Chain having extended threaded pin and variations thereof

Abstract

A chain assembly system with extended threads on the end of the pin to help facilitate disassembly of a chain assembly. Multiple variations are proposed incorporating these extended thread including variations to the fastener / nut, washers, cups, and so forth.

Description

CHAIN HAVING EXTENDED THREADED PIN AND VARIATIONS THEREOFCROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to United States Provisional Patent Application No.63 / 739,175 filed on December 27, 2024, the entire contents of which are incorporated herein by reference.BACKGROUND

[0002] Industrial chains are used in a variety of industries including conveyor (or elevator) systems for mines, processing plants, agricultural plants, recycling plants, refineries, foundries, and so forth. While certain chains may last longer than others, all chains in continual use eventually require repair (for example, by failing) as components wear on one another during operation. Rather than replacing the entire chain, which would be quite costly, chain links are frequently repaired in the field to bring the conveyor system back into operation.

[0003] However, repairing chains in the field still can be laborious, difficult, cumbersome, and slow. In many instances, the site of repair may be cramped or difficult for the repairperson to access. Still further, tools are often required as part of the repair process and, either based on the size of the tools (given the space and conditions of the working space for repair) or the availability of the power systems to run the tools, it can be physically and logistically difficult to execute a repair. Downtime can be very costly if a repair cannot be quickly implemented and so there remains a high demand for a robust and efficient system for repairing chains.

[0004] Some solutions have been proposed for repair of chain assemblies including U.S. Patent No. 11,958,102 which issued on April 16, 2024 to Rexnord Industries, LLC and U.S. Patent No. 12,181,019 which issued December 31, 2024 to Rexnord Industries, LLC, both of which are incorporated herein for all purposes. U.S. Patent No. 11,958, 102 proposes a design in which a multi-jack bolt tensioner is utilized to pull a pin through a sidebar of a chain to create an interference or press fit between the pin and outer sidebar. While this multi -jackbolt design can be used to create great forces with hand tools or low-power tools, such a repair assembly includes more components and the pin may need to have additional length to permit the attachment of the multi -jack bolt tensioner, which additional length may need to be removed. U.S. Patent No. 12,181,019 also proposes the creation of an interference fit duringQBM00091243.1 1 790063.02531pin insertion, but the interference fit can be formed by the tightening of a single nut. Therein, an axial stop is used to limit the movement of the pin which may prevent overtightening.SUMMARY

[0005] Such earlier chain repair and chain assembly concepts primarily focused on the assembly and / or repair of a chain. However, they did not address how an already-installed pin could be removed from a sidebar. In particular, once locked together by an interference or press fit, a sizable amount of torque would then be necessary to remove such a press-fit pin. So, while such earlier work focused on assembly and repair, little to no consideration was made as to how to accommodate disassembly of a pin in place. Accordingly, there could be significant benefits resulting from improved assemblies and methods that take into consideration not only the assembly or repair of the chain, but also contemplate improved disassembly. Disclosed herein are chain structures and related methods that can better accommodate installation and repair. While such structures and methods can be utilized as described herein, it is also contemplated that individualized aspects of these structures and methods could be implemented to improve existing chain structures and repair methods.

[0006] According to one aspect of this disclosure, a chain assembly system is disclosed. The chain assembly system includes an inner chain link, an outer sidebar (which is one of a pair of sidebars), a pin, a cup, and a nut. The inner chain link defines an inner bore. The outer sidebar defines an outer bore. The pin includes a body, a head end, and a threaded end opposite to the head end and having threads. The cup has an opening configured to receive the threaded end of the pin external to the outer sidebar. The nut is configured to threadingly engage the threads of the threaded end of the pin external to the cup. The threaded end of the pin is configured to be inserted through the inner bore and the outer bore that are aligned, inserted through the opening of the cup that is configured to be externally positioned to the outer sidebar, and threadingly engaged with the nut that is configured to be externally positioned relative to the cup. When the nut is threadingly engaged with the threaded end of the pin, the pin is pulled from an interference fit between the pin and the outer sidebar to disassemble the chain assembly system.QBM00091243.1 2 790063.02531

[0007] In some forms, the cup has a first length measured along an axis of the pin and the outer sidebar has a second length measured along the axis of the pin, the first length being greater than or equal to the second length.

[0008] In some forms, when the pin is pulled from the interference fit, the body of the pin is received in the opening of the cup.

[0009] In some forms, as the nut is further tightened, the pin is further removed from the interference fit until a shoulder of the cup contacts the body of the pin to block further advancement.

[0010] In some forms, the cup and the nut are integrally formed as an integral nut cap having a cup portion and a nut portion.

[0011] In some forms, the integral nut cap has a unitary diameter along an entirety of the integral nut cap.

[0012] According to another aspect of this disclosure, a fastener configured to assemble and disassemble a chain link assembly is provided. The fastener includes a main body, a first opening, a second opening, and a shoulder. The main body extends between a first end face and a second end face. The first opening extends partially through the main body from the first end face. The second opening extends partially through the main body from the second end face and has threads. The first opening and the second opening intersect with one another and extend an axial length of the main body. The shoulder defines where the first opening and the second opening intersect. To form a press-fit between a pin and an outer sidebar of the chain link assembly, the second end face contacts the outer sidebar of the chain link assembly. And, to remove the press-fit between the pin and the outer sidebar of the chain link assembly, the first end face contacts the outer sidebar of the chain link assembly.

[0013] In some forms, at least one of the first end face and the second end face includes a groove that extends around at least one of the first opening and the second opening.

[0014] In some forms, the main body has a hexagonal shape and includes chamfered corners where the main body meets at least one of the first end face and the second end face.

[0015] In some forms, the second end face contacts the main body of the pin and blocks the pin from further advancement when the press-fit is formed.

[0016] In some forms, the shoulder contacts the main body of the pin and blocks the pin from further advancement when the press-fit is removed.QBM00091243.1 3 790063.02531

[0017] According to yet another aspect, a method of assembling and disassembling a chain link assembly with a fastener is provided. The fastener is provided. The fastener comprises, a main body, a first opening, and a second opening. The main body extends between a first end face and a second end face. The first opening extends partially through the main body from the first end face. The second opening extends partially through the main body from the second end face and has threads. During assembly, a pin is inserted through aligned bores of an inner link and an outer sidebar, the threads of the second opening are threadingly engaged with the pin, the fastener is advanced along the pin until the second end face contacts the outer sidebar, and an axial force is transmitted through the second end face to draw the main body of the pin through a bore of the outer sidebar to form a press-fit between the pin and the outer sidebar. During disassembly, the pin is inserted through the first opening of the fastener, the pin is threadingly engaged with the threads of the second opening, the fastener is advanced along the pin until the first end face contacts the outer sidebar; and an axial force is transmitted through the first end face to pull the pin from the bore of the outer sidebar to remove the press-fit.

[0018] According to another aspect of this disclosure, another chain assembly system is provided. The chain assembly system includes an inner chain link, an outer sidebar (which is one of a pair of sidebars), a pin, a fastener, and a cap. The inner chain link defines an inner bore. The outer sidebar defines an outer bore. The pin includes a body, a head end, and a threaded end opposite to the head end and having threads. The fastener includes a main body, a first opening, and a second opening. The main body extends between a first end face and a second end face. The first opening extends partially through the main body from the first end face. The second opening extends partially through the main body from the second end face and has threads. The cap is coupled to the first end face of the fastener. The cap covers the second opening and the pin.

[0019] In some forms, the cap extends between a first end and a second end. The first end has an internal recess configured to receive the threaded end of the pin.

[0020] In some forms, the internal recess includes threads configured to threadingly engage with the threaded end of the pin to couple the cap to the pin.QBM00091243.1 4 790063.02531

[0021] In some forms, the cap includes a groove that extends around a periphery of the cap. The groove is configured to receive a portion of the main body of the fastener to couple the cap to the fastener.

[0022] In some forms, the groove includes a first set of threads and the main body of the fastener includes a second set of threads. The first set of threads are configured to threadingly engage with the second set of threads.

[0023] In some forms, the cap includes a recess configured to receive a power tool to drive the cap.

[0024] According to yet another aspect of this disclosure, another chain assembly system is provided. The chain assembly system includes an inner chain link, an outer sidebar (which is one of a pair of sidebars), a pin, and a pin adapter. The inner chain link defines an inner bore. The outer sidebar defines an outer bore. The pin includes a first pin end and a second pin end opposite to the first pin end. The first pin end has a first engagement feature. The pin adapter comprises a pin engaging portion having a second engagement feature and a pin extender portion opposite the pin engaging portion. The pin extender portion includes external threads. The first engagement feature of the first pin end is configured to engage with the second engagement feature of the pin adapter thereby coupling the pin and the pin extender and providing the pin with external threading.

[0025] In some forms, the first engagement feature is a threaded recess and the second engagement feature is external threading configured to threadingly engage with the threaded recess.

[0026] In some forms, a cross-sectional area of the external threading of the pin extender is larger than a cross-sectional area of the pin.

[0027] In some forms, the cross-sectional area of the external threading of the pin extender is larger than a cross-sectional area of the outer bore.

[0028] In some forms, one of the first engagement feature and the second engagement feature includes a tongue and the other one of the first engagement feature and the second engagement feature includes a groove. The groove is configured to receive the tongue to couple the pin to the pin adapter.

[0029] According to yet another aspect of this disclosure, another chain assembly system is provided. The chain assembly system includes an inner chain link, an outer sidebar (whichQBM00091243.1 5 790063.02531is one of a pair of sidebars), a pin, a washer, and a fastener. The inner chain link defines an inner bore. The outer sidebar defines an outer bore. The pin includes a body, a head end, and a threaded end opposite to the head end and having threads. The pin includes a groove extending from the threaded end of the pin. The washer comprises a washer opening, a first tongue, an outer diameter, and a second tongue. The washer opening is defined by an inner diameter. The washer opening is configured to receive the threaded end of the pin. The first tongue extends radially inward from the inner diameter. The outer diameter defines a periphery of the washer. The second tongue extends radially outward from the outer diameter. The fastener is configured to threadingly engage the threads of the threaded end of the pin external to the washer. The groove of the pin receives the first tongue when the washer opening receives the threaded end of the pin thereby locking relative rotation between the washer and the pin. The second tongue is configured to be bent around the fastener thereby locking relative rotation between the washer and the fastener.

[0030] In some forms, the washer opening and the threaded end of the pin form a clearance fit when the washer opening receives the threaded end of the pin.According to yet another aspect, a method of preventing rotation of a pin and a fastener in a chain link assembly is provided. A pin having a threaded end and a groove is inserted through aligned bores of an inner link and an outer sidebar. A washer is positioned on the threaded end of the pin such that a first tongue of the washer engages the groove to lock rotation between the washer and the pin. A fastener is threadingly engaged with the threaded end of the pin external to the washer. The second tongue of the washer is bent around the fastener to lock rotation between the washer and the fastener.

[0031] In some forms, the second tongue is one of a set of second tongues.

[0032] According to yet another aspect of this disclosure, a pin assembly configured to be used for disassembly of a chain assembly is described. The pin assembly comprises a pin and a pin adapter. The pin extends along a pin axis and the pin includes a pin end having a tongue and a first alignment feature. The pin adapter extends along a pin adapter axis. The pin adapter includes a groove configured to receive the tongue, a second alignment feature, and external threading opposite the groove. The first alignment feature engages with the second alignment feature when the pin axis and the pin adapter align.QBM00091243.1 6 790063.02531

[0033] In some forms, the first alignment feature is on the tongue and includes a first recess. The second alignment feature is on the groove and includes a ball at least partially received within a second recess.

[0034] In some forms, when the groove receives the tongue and the pin rotational axis and the pin adapter rotational axis align, a biasing member biases the ball and the first recess receives at least a portion of the ball.

[0035] According to yet another aspect of this disclosure, a chain assembly system for assembling a chain link is described. The chain assembly system includes an inner sidebar, an outer sidebar, a pin, a washer assembly, and a fastener. The inner side bar has an inner bore. The outer sidebar has an outer bore. The pin extends through the inner bore and the outer bore. The washer assembly has a first washer coupled to a second washer. The washer assembly is configured to be fit onto an end of the pin external to the outer sidebar. The fastener is configured to be fit onto the end of the pin external to the washer assembly. The first washer includes a first plurality of steps and the second washer includes a second plurality of steps. The first plurality of steps is configured to engage with the second plurality of steps.

[0036] In some forms, the first plurality of steps includes a first sub-step having a first height, a second sub-step having a second height, the second height being greater than the first height, and a third sub-step having a third height, the third height being greater than the second height.

[0037] In some forms, when the fastener is rotated along a rotational axis of the pin in a first direction, the washer assembly moves to a spaced configuration. When the fastener is rotated along the rotational axis of the pin in a second direction opposite the first direction, the washer assembly moves to a compressed configuration.

[0038] In some forms, an axial gap is defined between the fastener and the washer when the washer assembly moves to the compressed configuration.

[0039] In some forms, the washer assembly includes a biasing member positioned between the first washer and the second washer.

[0040] In some forms, the washer assembly includes a biasing member positioned between the first washer and the second washer. The biasing member is configured to move the washer assembly to the spaced configuration from the compressed configuration.QBM00091243.1 7 790063.02531

[0041] According to yet another aspect of this disclosure, a pin extender assembly configured to engage a pin of a chain assembly is described. The pin extender assembly comprises a pin adapter, a fastener, and an internal assembly. The pin adapter extends along a central axis. The pin adapter has a pin engaging end configured to engage with the pin and a pin extending end opposite the pin engaging end. The pin extending end has threads. The fastener is configured to threadingly engage with the threads of the pin extending end. The internal assembly is housed within the fastener. The internal assembly includes a washer assembly having a first washer coupled to a second washer. The first washer includes a first plurality of steps and the second washer includes a second plurality of steps. The first plurality of steps is configured to engage with the second plurality of steps.

[0042] In some forms, the pin adapter, fastener, and internal assembly are arranged in a subassembly configured to engage the pin.

[0043] In some forms, the internal assembly includes a thrust ring having a notch. The pin adapter includes an adapter shoulder positioned between the pin engaging end and the pin extending end. The fastener includes a fastener shoulder. The pin extender assembly is configured to move between a retracted position where the notch contacts the adapter shoulder and an extended position where the fastener shoulder contacts the adapter shoulder.

[0044] In some forms, the engagement feature is configured to engage with the pin when in the retracted position and the threads of the pin adapter extend past the fastener when in the extended position.

[0045] In some forms, the threads of the pin adapter are internal threads. The fastener includes a bolt that configured to threadingly engage with the internal threads of the pin adapter.

[0046] In some forms, the internal assembly includes a thrust ring having a notch. The pin adapter includes an adapter shoulder positioned between the pin engaging end and the pin extending end. The pin extender assembly is configured to move between a retracted position where the notch contacts the adapter shoulder and an extended position where the fastener contacts the pin extending end.

[0047] According to yet another aspect of this disclosure, a pin extender assembly configured to engage a pin of a chain assembly is described. The pin extender assembly comprises a pin adapter, a fastener, and an external assembly. The pin adapter extends alongQBM00091243.1 8 790063.02531a central axis. The pin adapter has a pin engaging end configured to engage with the pin and a pin extending end opposite the pin engaging end. The pin extending end has threads. The fastener is configured to threadingly engage with the threads of the pin extending end. The external assembly is coupled to the fastener. The external assembly includes a washer assembly having a first washer coupled to a second washer. The first washer includes a first plurality of steps and the second washer includes a second plurality of steps. The first plurality of steps is configured to engage with the second plurality of steps.

[0048] In some forms, the pin adapter, fastener, and external assembly are arranged in a subassembly.

[0049] In some forms, the pin adapter further includes a recess that is configured to receive a retaining ring. The pin adapter includes an adapter shoulder positioned between the pin engaging end and the pin extending end. The fastener includes a fastener shoulder. The pin extender assembly is configured to move between a retracted position where the fastener contacts the retaining ring and an extended position where the fastener shoulder contacts the adapter shoulder.

[0050] In some forms, the engagement feature is configured to engage with the pin when in the retracted position and the threads of the pin adapter extend past the fastener when in the extended position.

[0051] According to yet another aspect of this disclosure, another chain assembly system is provided. The chain assembly system includes an inner chain link, an outer sidebar (which is one of a pair of sidebars), a pin, a fastener, and a locking device. The inner chain link defines an inner bore. The outer sidebar defines an outer bore. The pin includes a body, a head end, and a threaded end opposite to the head end and having threads. The pin is configured to be received through the inner bore and the outer bore. The fastener is configured to threadingly engage the threads of the threaded end of the pin external to the outer sidebar. The locking device is configured to be received within the opening of the outer sidebar and contact the fastener when the fastener is rotated about a rotational axis, thereby blocking rotation of the fastener.

[0052] In some forms, the locking device is a pin and the opening is a through hole that extends entirely through the outer sidebar.QBM00091243.1 9 790063.02531

[0053] In some forms, the opening includes threads and the locking device is configured to threadingly engage with the threads of the opening.

[0054] In some forms, the fastener has a hexagonal shape and the locking device protrudes from the outer sidebar when the opening receives the locking device.

[0055] According to yet another aspect of this disclosure, a chain assembly system for assembling a chain link is provided. The chain assembly system includes an inner sidebar, an outer sidebar, a pin, and an accessory. The inner sidebar has an inner bore. The outer sidebar has an outer bore. The pin extends through the inner bore and the outer bore. The pin has an engagement feature on an end of the pin. The accessory prevents rotation of the pin. The accessory extends from a first end to a second end. The accessory includes a first side, a second side, a groove, and a handle. The first side is configured to engage the outer sidebar. The second side is opposite the first side and includes a handle. The groove is on the first side. The groove extends from the first end to the second end. The groove is configured to receive the engagement feature of the pin. To prevent rotation of the pin, a user is configured to grasp the handle while the engagement feature of the pin is received by the groove.

[0056] The foregoing and other aspects and advantages of the present disclosure will appear from the following description. In the description, reference is made to the accompanying drawings that form a part hereof, and in which there is shown by way of illustration one or more exemplary versions. These versions do not necessarily represent the full scope of the disclosure.BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The following drawings are provided to help illustrate various features of nonlimiting examples of the disclosure and are not intended to limit the scope of the disclosure or exclude alternative implementations.

[0058] FIG. 1 is a top, front, and right isometric view of a chain assembly according to a first embodiment.

[0059] FIG. 2 is a top view of the chain assembly of FIG. 1.

[0060] FIG. 3 is a top, front, and right isometric view of inner links that are to be assembled in the chain assembly of FIG. 1.QBM00091243.1 10 790063.02531

[0061] FIG. 4 is a top, front, and right isometric view of outer link parts that are to be assembled in the chain assembly of FIG. 1.

[0062] FIG. 5 is a top, front, and right isometric view of a pin that is to be assembled in the chain assembly of FIG. 1.

[0063] FIG. 6 is a cross-sectional top view of an example chain assembly with a cup for facilitating disassembly of the pin from the sidebar, according to a second embodiment.

[0064] FIG. 7 is a top, front, and left isometric view of a cup that is to be utilized in the disassembly of the chain assembly of FIG. 6.

[0065] FIG. 8 is a top, back, and right isometric view of a cup that is to be utilized in the disassembly of the chain assembly of FIG. 6.

[0066] FIG. 9A is a top, front, and left isometric view of an embodiment of a nut cap that are to be assembled in the chain assembly of FIG. 6 in which the nut and the cap are integrated with one another as a nut cap.

[0067] FIG. 9B is a top, back, and right isometric view of the nut cap of FIG. 9A.

[0068] FIG. 9C through FIG. 9F are cross-sectional views of multiple embodiments of nut caps that are to be assembled in the chain assembly of FIG. 6 in which the nut and the cup are integrated with one another as a nut cap.

[0069] FIG. 10 is a top, front, and right isometric view of an example chain assembly with a threaded cup positioned for chain assembly, according to a third embodiment.

[0070] FIG. 11 is a top, front, and right isometric view of an example chain assembly with a threaded cup positioned for chain disassembly, according to a third embodiment.

[0071] FIG. 12 is a front, bottom, and right isometric view of a threaded cup that is to be utilized in the chain assembly of FIG. 11.

[0072] FIG. 13 is a cross-sectional right side view of a threaded cup that is to be utilized in the chain assembly of FIG. 11.

[0073] FIG. 14 is a bottom view of a threaded cup that is to be utilized in the chain assembly of FIG. 11.

[0074] FIG. 15 is a top view of a threaded cup that is to be utilized in the chain assembly of FIG. 11.

[0075] FIG. 16 is a cross-sectional view of an example chain assembly with a threaded cup positioned for chain disassembly, according to the third embodiment.QBM00091243.1 11 790063.02531

[0076] FIG. 17 is a top, front, and right isometric view of an example chain assembly of FIG. 10 with a protective cap.

[0077] FIG. 18A through 18D are cross-sectional side views of multiple embodiments of the chain assembly with a protective cap in FIG. 17.

[0078] FIG. 19 is a cross-sectional view of an example chain assembly of FIG. 6 with a protective cap installed.

[0079] FIG. 20 is an exploded view of an example pin assembly that is to be assembled in a chain assembly, according to a fourth embodiment in which an internal to external thread adapter is implemented.

[0080] FIG. 21A is a cross-sectional view of the example pin assembly of FIG. 20 with the adapter in the pin.

[0081] FIG. 2 IB is a cross-sectional view of the example pin assembly of FIG. 20 with the adapter in the pin and the adapter further having a central hex form between the threaded sections.

[0082] FIG. 22 is an exploded view of an example pin assembly that is to be assembled in a chain assembly.

[0083] FIGS. 23 A and 23B are cross-sectional views of example pin assembly of FIG. 22.

[0084] FIG. 24 is an exploded view of an example pin assembly that is to be assembled in a chain assembly, according to a fifth embodiment in which a dovetail slotted interface is used to attach a threaded extension to an axial end of the pin.

[0085] FIGS. 25 A and 25B are cross-sectional views of example pin assembly of FIG. 24 with different sized threaded adapters being attached to an otherwise identical pin using a similarly sized dovetail structure.

[0086] FIG. 26 is a top, front, and left isometric view of an example pin that is to be assembled in a pin assembly, according to a sixth embodiment with a double dovetail design.

[0087] FIG. 27 is a top, front, and left isometric view of an example adapter that is to be assembled in a pin assembly with the example pin in FIG. 26.

[0088] FIG. 28 is a detailed side view of the example pin of FIG. 26 and the example pin adapter of FIGS. 27 in a pin assembly illustrating the double dovetail connection.

[0089] FIG. 29 is a detailed side view of an example pin assembly that is to be assembled in a chain assembly, according to a seventh embodiment involving an adhesive interface.QBM00091243.1 12 790063.02531

[0090] FIG. 30 is a detailed side view of an example pin assembly that is to be assembled in a chain assembly, according to an eighth embodiment involving a magnetic matrix.

[0091] FIG. 31 is a top, front, and right isometric view of an example chain assembly with a locking device or stake for blocking rotation of a fastener, according to a ninth embodiment.

[0092] FIG. 32 is a partially exploded view of an example chain assembly with a locking washer for blocking rotation of a fastener, according to a tenth embodiment.

[0093] FIG. 33 is a top, front, and left isometric view of an example chain assembly of FIG. 32 after assembly and some of the tabs of the locking washer are bent.

[0094] FIG. 34 is a top, front, and right isometric view of a pin that is to be assembled in the chain assembly of FIG. 32, apart from the rest of the assembly.

[0095] FIG. 35 is a front view of the pin of FIG. 34 that is to be assembled in the chain assembly of FIG. 32.

[0096] FIG. 36 is a top, front, and right isometric view of a locking washer that is to be assembled in the chain assembly of FIG. 32 with every other tab bent.

[0097] FIG. 37 is a front view of an alternative locking washer in which a central tab has been replaced with slits.

[0098] FIG. 38 is a right side view of the alternative locking washer of FIG. 37.

[0099] FIG. 39 is an isometric view of an example pin assembly that is to be assembled in a chain assembly, according to an eleventh embodiment in which the pin assembly includes a ball and groove alignment feature.

[0100] FIG. 40 is a top, front, and left isometric view of a pin adapter of the pin assembly of FIG. 39, apart from the rest of the pin assembly.

[0101] FIG. 41 is a cross-sectional side view of the pin adapter of FIG. 40.

[0102] FIG. 42 is a side view of the pin assembly of FIG. 40, in which the pin adapter is engaging the pin.

[0103] FIG. 43 is an isometric view of a chain assembly, according to a twelfth embodiment in which the chain assembly includes a washer assembly and a fastener.

[0104] FIG. 44 is a side view of the chain assembly of FIG. 43 in which the washer assembly is in a spaced configuration.

[0105] FIG. 45 is a side view of the chain assembly of FIG. 43 in which the washer assembly is in a compressed configuration.QBM00091243.1 13 790063.02531

[0106] FIG. 46 is a cross-sectional side view of the washer assembly of FIG. 43 in which the washer assembly includes a biasing member.

[0107] FIG. 47A is a cross-sectional side view of a pin extender assembly, according to a thirteenth embodiment in which the pin extender assembly includes a pin extender, a fastener, and an internal assembly housed within the fastener and the pin extender assembly is in a retracted position.

[0108] FIG. 47B is a cross-sectional side view of the pin extender assembly of FIG. 47A, in which the pin extender assembly is in an extended position.

[0109] FIG. 48A is a cross-sectional side view of a pin extender assembly, according to a fourteenth embodiment in which the pin extender assembly includes a pin extender, a fastener, and an external assembly coupled to the fastener and the pin extender assembly is in a retracted position.

[0110] FIG. 48B is a cross-sectional side view of the pin extender assembly of FIG. 48A, in which the pin extender assembly is in an extended position.

[0111] FIG. 49 is a cross-sectional side view of an integral nut cap, according to a fifteenth embodiment in which the integral nut cap includes a cover that has a recess for engagement with a power tool.

[0112] FIG. 50A is a cross-sectional side view of a pin extender assembly, according to a sixteenth embodiment in which the pin extender assembly includes a pin extender having internal threading and the fastener includes a bolt and the pin extender assembly is in a retracted position.

[0113] FIG. 50B is a cross-sectional side view of the pin extender assembly of FIG. 50A, in which the pin extender assembly is in an extended position.

[0114] FIG. 50C is a cross-sectional side view of the pin extender assembly of FIG. 50A, in which the pin extender assembly includes a different internal assembly having a different washer assembly.

[0115] FIG. 51 is a top, front, and right isometric view of an accessory system, according to a seventeenth embodiment in which a groove of the accessory system is configured to engage with a pin end of a chain assembly.QBM00091243.1 14 790063.02531

[0116] FIG. 51 is a top, front, and right isometric view of an accessory system, according to a seventeenth embodiment in which a groove of the accessory system is engaged with pin ends of a chain assembly.

[0117] FIG. 52 is a top, back, and right isometric view of the accessory system of claim 51 in which the accessory system holds components of a pin assembly system.DETAILED DESCRIPTION

[0118] As described above, repairing chains can be a difficult and time-consuming process. Typically, repairing chains, regardless of how the failure occurs, requires replacing one or more pins to rejoin the disconnected ends of the chain. For example, a replacement pin is inserted through a pair of bores, each through opposing ends of the chain to couple the chain links together. However, conventional repair methods have significant downsides.

[0119] For example, in one conventional approach, a welding torch can be used to physically join the end of the replacement pin to one of the chain links. However, welding often requires a combustible fluid to drive melting of the welding rod that deposits material to join the two components together. And because industrial chains often operate in enclosed spaces without ventilation, the welding approach cannot be used in this scenario (for example, due to fear of leaking of the combustible fluid into the enclosed space). So, in many instances, if welding is to be used, the chain must be taken offsite for repairs. Additionally, the welding approach - assuming it is possible in a given situation - requires extensive operator skill. Not every operator, and certainly not many, if at all present at the location the chain is being used at, are even capable (or available) to repair the chain. Still further, because the replacement pin has to be entirely inserted through both ends of each bore before welding, an interference fit is not formed at the coupling location between the chain link and the pin. This can be undesirable at least because each chain link is joined to its adjacent chain link with an interference fit, which is typically a stronger interface than the welded joint. And, because the welded joint is weaker, this is more likely to cause a subsequent failure at this weaker location rather than at different locations, which can be a hindrance for the site location that is using the chain (for example, because this repaired chain is weaker than a new chain).

[0120] As another example, in a second conventional approach, a grinder can be used to physically join the end of the replacement pin to one of the chain links. However, a grindedQBM00091243.1 15 790063.02531joint has similar issues as the welded joint. For example, grinding the joint also requires the replacement pin to be entirely inserted through both ends of each bore before welding, and so an interference fit is also not formed at the coupling location between the chain link and the pin. While the grinder does not usually use combustible fluid and thus it can be used in enclosed spaces, it does require a battery that must be charged to power the grinder. And so, the operator must remember to charge the battery prior to repair, and to remember to bring the charged battery to the repair location (along with the grinder). As with the welding approach, the grinding approach also requires a skilled operator to join the components together, which may be difficult to locate someone with this skill set at the repair site. Thus, the chain may need to be brought to an offsite location for repairs, which increases downtime for the conveyor system (for example, the time that the conveyor system cannot be used while the chain is being repaired).

[0121] As yet another example, in a third conventional approach, a hand powered pneumatic actuator, such as the Rexnord® Linkmaster and Rexnord® Drivemaster, can be used to create an interference fit between one end of the replacement pin and one of the chain links to physically join these components together. In this approach, the replacement pin is inserted through both bores as far as possible, and a drive assembly is placed around and in contact with both ends of the replacement pin. Then, an operator continuously drives the manual hand powered pump to force the replacement pin through the bore of the chain link thereby generating an interference fit between these components. While this approach does create an interference fit, multiple operators (for example, three) are required to steady (or align) opposing sides of drive assembly (for example, to ensure proper contact with the pin), and to operate the pneumatic pump to force to the drive assembly together to create the interference fit. Additionally, because this approach utilizes a hand-powered pneumatic actuator, it can take a significant amount of time and considerable manual effort to drive the pump and create the interference fit.

[0122] Some embodiments of this disclosure provide solutions to these issues (and others) by providing improved systems and methods for assembling, repairing, and disassembling chains. For example, some embodiments of the disclosure provide chain assembly system including a cup that reduces the need for specialized tools and minimizes manual effort, enabling faster and safer repairs in confined or difficult-to-access environments. TheseQBM00091243.1 16 790063.02531systems can create and release interference fits without requiring heavy equipment or multiple operators, thereby reducing downtime and operational costs. Additionally and notably, the disclosed designs allow for controlled disassembly of press-fit components, improving serviceability and reducing the risk of damage to chain parts during maintenance. By simplifying both assembly and disassembly, these embodiments enhance reliability, extend the lifespan of chain assemblies, and improve overall efficiency in industrial applications. Some embodiments of the disclosure also provide for caps to protect the chain assembly system from contaminants that could enter the chain assembly system.

[0123] Some embodiments of the disclosure provide adapters for converting a pin without external threads into a pin having external threads. In doing so, the adapter enables the pin to accept axial forces during assembly and disassembly, which facilitates the creation and release of interference fits without requiring specialized tools or excessive manual effort. This configuration can also reduce the risk of thread damage compared to directly threading the pin, thereby improving durability and serviceability. By allowing the adapter to be attached only when needed, the pin remains lighter and less susceptible to environmental contaminants during normal operation, which enhances corrosion resistance and extends component life. Additionally, the use of adapters provides flexibility in selecting thread sizes and engagement features independent of the constraints of the chain assembly.

[0124] Some embodiments of the disclosure provide components that prevent rotation of a fastener on a pin to lock the fastener in place. These components, such as a rotational stop washer or a locking device, create a mechanical interlock that resists loosening under vibration or torque loads. This design eliminates the need for adhesives or secondary locking devices, simplifies assembly, and allows for easy disassembly without damaging parts.

[0125] FIGS. 1 and 2 show a chain assembly 100 that has inner links 102, 104, which are coupled together by outer sidebars 174, 176, as part of an outer link which includes outer link parts 170, 172 to form the chain assembly 100.

[0126] As shown in FIG. 3, the inner link 102 includes inner sidebars 106, 108 separated from each other. The inner sidebars 106, 108 are coupled together by bushings 110, 112 to form the inner link 102. Although the inner sidebars 106, 108 are illustrated as being planar and rectangular with rounded edges, the inner sidebars 106, 108 can be implemented to have different shapes or geometries.QBM00091243.1 17 790063.02531

[0127] With continued reference being had to FIG. 3, each inner sidebar 106, 108 has openings that can at least partially define a respective bore. For example, the inner sidebar 106 has openings 120, 122, 124 that are directed entirely through the inner sidebar 106, and the inner sidebar 108 has openings 126, 128, 130 that are directed entirely through the inner sidebar 108. Although the inner sidebars 106, 108 are illustrated as having three openings, the inner sidebars 106, 108 can include any number of openings. In some examples, the openings of the inner sidebars 106, 108 can provide a coupling location for the bushings 110, 112. For example, the bushing 110 can be coupled to the inner sidebars 106, 108 by inserting a first end of the bushing 110 through the opening 120 of the inner sidebar 106 and by inserting a second end of the bushing 110 through the opening 126 of the inner sidebar 108. As such, the bushing 110 is coupled to the inner sidebars 106, 108 at the openings 120, 126 (e.g., by an interference fit). Similarly, the bushing 112 can be inserted through a different one of the openings of the inner sidebars 106, 108. For example, as illustrated, the bushing 112 is inserted through the opening 124 of the inner sidebar 106 and through the opening 130 of the inner sidebar 108 to couple the bushing 112 to the inner sidebars 106, 108.

[0128] As shown in FIG. 1 through FIG. 3, the bushings 110, 112 define bores 114, 116, which can each provide an access channel through and between the inner sidebars 106, 108. As such, each bore 114, 116 is configured to receive a pin, such as from an adjacent link and / or sidebars, or a portion thereof, to support the formation or repair of a chain. In some examples, such as illustrated in FIG. 1, the bushings 110, 112 can each entirely define their respective bore 114, 116, with the bores 114, 116 being coaxially positioned relative to the openings of the plates 106, 108. For example, the bore 114 is coaxially positioned relative to the openings 120, 126, and the bore 116 is coaxially positioned relative to the openings 124, 130. In other examples, bores of other links or sidebars can be defined by their openings of their sidebars.

[0129] In some examples, the bushings 110, 112 can include respective rollers coaxially received around the bushings 110, 112. In other examples, the bushings 110, 112 can be bushed rollers (such as steel bushed rollers). Regardless of the particular implementation, an interior surface of each bushing 110, 112 can provide a bearing surface that is configured to receive a pin through one of the bushings 110, 112 to easily roll over its interior surface. In some examples, the interior surface may be lubricated, however, in alternative configurations, the interior surface of the bushings 110, 112 may not be lubricated. The inner link 104 isQBM00091243.1 18 790063.02531structured in a similar manner as the inner link 102, and thus, includes similar features as the inner link 102.

[0130] Although the chain assembly 100 is illustrated as only having inner links 102, 104, it is to be appreciated that the chain assembly 100 has other links that are coupled to and extend from the inner links 102, 104 in both directions in addition to the outer link centrally connecting the two. In other words, while the inner links 102, 104 each have only a single link as illustrated, the chain links 102, 104 can have other numbers of links such as, for example, a series of chain links so as to form a longer chain that, in most instances, will loop onto itself.

[0131] Referring now to FIG. 4, the chain assembly 100 also includes the outer link parts 170, 172 as part of the outer link, which are coupled to the inner links 102, 104. As illustrated, the outer links parts 170, 172 can collectively define aligned, albeit spaced, bores for reception of a pin therethrough. In particular, the outer link 170 has bores 182, 184 and the outer link 172 has bores 186, 188, where the bores 182, 186 can collectively define a set of aligned bores and where the bores 184, 188 can collectively define another set of aligned bores. The bores 186, 188 can be substantially larger than the bores 182, 184 so that, for example, a pin inserted through the set of aligned bores can fit through the bores 186, 188 with relative ease, while forming an interference fit with the bores 182, 184 or a close clearance fit in accordance with many of the subsequently described embodiments. In some examples, the outer link parts 170, 172 can be structured similarly to each other (e g., both having the same shape, such as being rectangular with rounded edges). In other examples, the outer link parts 170, 172 can be structured differently. In some examples, the outer link parts 170, 172 can be structured similarly to the inner links 102, 104, while in other cases, each of the outer link parts 170, 172 can be structured in a different manner as the inner links 102, 104. For example, the outer link part 170 can have a flange 190 that extends away from an outer sidebar 174 of the outer link part 170, which includes the bores 182, 184. Similarly, the outer link part 172 can have a flange 192 that extends away from an outer sidebar 176 of the outer link part 172, which includes the bores 186, 188. In some examples, the flanges 190, 192 can extend away from each other in opposing directions, and each flange 190, 192 can include one or more openings directed therethrough for providing a coupling location (for example, a fastening location) for components to be coupled to the chain assembly 100. For example, each flange 190, 192 can include one or more openings that can facilitate the attachment of conveyor components (suchQBM00091243.1 19 790063.02531as buckets, trays, and so forth) by inserting fasteners (such as, for example, bolts) of the conveyor component through the one or more respective holes to couple the conveyor component to the chain assembly 100. Although FIG. 2 illustrates that the flanges 190, 192 extend from the respective outer sidebars 174, 176 at an angle that is substantially (that is, deviating by less than 10 percent from) 90 degrees, in other examples, the flanges 190, 192 can be angled relative to the respective outer sidebar 174, 176 at a different angle (or be omitted altogether).

[0132] In the chain assembly 100 illustrated in FIGS. 1 through 4, each of the set of aligned bores are configured to receive a pin. For example, a pin 200 has a main body 202 with a head end 204 and a threaded end 206 opposite the head end 204. The pin 200 can be first inserted through the bore 186 of the outer sidebar 176. In some examples, the pin 200 and the outer sidebar 176 may be pre-fit together as a subassembly. With the pin 200 inserted through the outer sidebar 176, the pin 200 can be further inserted through the inner link 102. For example, the pin 200 is configured to extend entirely through the bore 116 of the inner link 102 and is configured to then extend through the bore 182 of the opposing outer sidebar 174 (that is, the threaded end 206 of the pin 200 being inserted through the bore 182 so that the threaded end 206 is external to the outer sidebar 174). Similarly, another pin can be inserted in a similar manner through the bore 188 of the outer sidebar 176, through the inner link 104, and extend through the bore 184 of the opposing outer sidebar 174.

[0133] With the pin 200 extended through the outer sidebar 176, the inner links 102, 104, and the other outer sidebar 174, in the most general case, a nut 208 can be engaged with the pin 200. As the nut 208 is tightened and advanced along the threaded end 206 of the pin 200 towards a head end 204 of the pin 200 opposite the threaded end 206, the nut 208 forces the pin 200 through the bore 182 of the outer sidebar 174 to create an interference fit between the pin 200 and the outer sidebar 174 at the bore 182

[0134] The general description of a chain assembly has been provided to provide an exemplary case of general chain construction upon which the following embodiments, which constitute further improvements and new variations on that design. That is to say, the general description is provided so that the reader will have a general understanding of the parts of a chain and how they may be constructed. Hereinafter, various embodiments are provided which involve variations and improvements on that general construction. Notably, although not soQBM00091243.1 20 790063.02531depicted in FIGS. 1-5, it should be appreciated that what is depicted as the head end, could also include threading with the pin effectively having threading (or the ability to have threading through adapters) on both ends of the pin in order to permit some of the pressing and pin disassembly actions described herein.

[0135] Referring now to FIG. 6, an example embodiment of a chain assembly 300 is shown. For example, FIG. 6 illustrates a chain assembly 300 that is otherwise similar to the chain assembly 100. Unless indicated otherwise, the components, functionality, and advantages of the inner sidebars 106, 108, the bushings 110, 112, the outer sidebars 174, 176, and the pin 200 illustrated in FIG. 1 apply similarly to the illustrated example of FIG. 6. Generally speaking, all of the embodiments now further described involve components that aid in disassembly of the chain assembly.

[0136] With additional forward reference being made to FIG. 7 and 8, in some exemplary forms, a cup 310 is provided for use with the chain assembly 300 to facilitate disassembly of the pin 200 in the outer sidebar 174 and, ultimately, the chain assembly 300. The cup 310 comprises a main body 312 that extends between a first axial end face 314 (e.g., an outer sidebar-engaging side) and a second axial end face 316 (e.g., a nut-engaging side). In some examples, the end faces 314, 316 are substantially parallel with one another. The cup 310 defines an axial opening 318 that extends through the main body 312 and is configured to receive at least a portion of the pin 200. The axial opening 318 extends through a center of the main body 312. As illustrated, the cup 310 has a length LI that is greater than or equal to a width W1 of the outer sidebar 174.

[0137] In some examples, the axial opening is a through-bore having a uniform crosssection across the main body from the first end face to the second end face. In other examples, such as the illustrated example, the axial opening 318 is stepped and includes a cup shoulder 320. The shoulder 320 can be formed by a counterbore that enlarges the axial opening 318 on one of the faces 314, 316 to define the shoulder 320. Correspondingly, one of the end faces 314, 316 defines an opening that is larger than an opening defined by the other end face 314, 316. In the illustrated example, a first opening 322 defined by the first end face 314 on the outer sidebar-engaging side is larger than a second opening 324 defined by the second end face 316 on the nut-engaging side. Since the second opening 324 is smaller than the first opening 322, the second end face 316 has a larger surface than the first end face 314. Accordingly, theQBM00091243.1 21 790063.02531second end face 316 can provide a larger surface for a tightening device (e g., a nut) to contact when a user desires to disassemble the chain assembly 300.

[0138] Referring now back to FIG. 6, to facilitate disassembly of the chain assembly 300 (for example, by dislodging the pin 200 from an interference fit previously created between the pin 200 and the outer sidebar 174), the cup 310 can be fit around the pin 200. That is, the axial opening 318 of the cup 310 can receive the threaded end 206 of the pin 200 that is external to the outer sidebar 174. In some examples, the axial opening 318 and the pin 200 can form a clearance fit, which allows for simplified assembly of the cup 310 onto the threaded end 206 of the pin 200. The cup 310 can be translated along the pin 200 until the first end face 314 engages with the outer sidebar 174. A nut 330 can then be received on the pin 200 and threadingly engage the threaded end 206 of the pin 200. As this occurs, the cup 310 is positioned between the nut 330 and the outer sidebar 174. When the nut 330 is further tightened around the pin 200, the nut 330 moves along the pin 200 from the threaded end 206 toward the head end 204 until the nut 330 engages with the second end face 316 on the nutengaging side of the cup 310. The cup 310 thereby blocks further advancement of the nut 330 towards the head end 204 of the pin 200. Since the cup 310 blocks advancement of the nut 330, as the nut 330 is continued to be tightened around the pin 200, the cup 310 then acts as a press to transmit force from the nut 330 onto the second end face 316 of the cup 310 to the outer sidebar 174 via the first end face 314 of the cup 310. Correspondingly, as the nut 330 is further tightened, the pin 200 is pulled from the interference fit with the outer sidebar 174.

[0139] Since the length LI of the cup 310 is greater than or equal to the width W1 of the outer sidebar 174, the cup 310 provides sufficient spacing for the nut 330 to pull the pin 200 through the region of interference fit. That is, the length LI of the cup 310 is a sufficient length to pull the pin 200 through the set of aligned bores and overcome the interference fit zone. Further, it is also contemplated that the pin 200 includes a sufficient amount of threading along the threaded end 206 (e.g., a sufficient length of threading) so that the nut 330 can be tightened until the pin 200 is dislodged from the interference fit. If the threading is of insufficient length, the nut 330 could run out of threads to engage with, and may not be further tightened while the pin 200 and the outer sidebar 174 still form an interference fit.

[0140] It is contemplated that, rather than being discrete and separate components, a nut and cup can be formed into an integral unit. Referring now to FIGS. 9A through 9F, in otherQBM00091243.1 22 790063.02531alternative embodiments incorporating such a cup-as-a-press member concept, an integral nut cap 400 can be used to facilitate disassembly of a chain assembly (for example, chain assembly 100). Referring to FIGS. 9A and 9B, the integral nut cap 400 includes a base cup portion 410 that defines a cup end 412 and a cup opening 414 and that has similar characteristics as the cup 310. The integral nut cap 400 also includes a nut cap portion 420 that defines a nut end 422 and a nut opening 424 having threads. The nut cap portion 420 has similar characteristics as the nut 330. Some or all of the outer diameter of nut cap 420 can have a shaped outer profile (e g., hex shaped) to receive a driver or tool; it is also possible that said profile for receiving a driver or tool could be formed in the axial end. The base cup portion 410 and the nut cap portion 420 are integrally formed with one another to form the integral nut cap 400. As such, the discussion above with regard to the cup 310 and the nut 330 applies to the integral nut cap 400 here.

[0141] During disassembly, the integral nut cap 400 acts as a press to remove the pin 200 from the interference fit between the pin 200 and the outer sidebar 174. To do so, the integral nut cap 400 is received onto the pin 200 by inserting the pin 200 through the cup opening 414 until the pin 200 threadingly engages with the threads in the nut opening 424. As the integral nut cap 400 is tightened around the pin 200, the integral nut cap 400 moves along the pin 200 until the cup end 412 contacts the outer sidebar 174. As the integral nut cap 400 is further tightened, the cup end 412 presses against the outer sidebar 174 to dislodge the pin 200 from the interference fit.

[0142] The base cup portion 410 has a length L2. In some examples, the cup opening 414 also has the length L2. The length L2 corresponds with the size of the pin 200, so that the cup opening 414 has sufficient size to accommodate the pin 200 when the pin 200 is pulled from the interference fit. For example, the cup opening 414 has the length L2 and the length L2 is greater than or equal to the width W1 of the outer sidebar 174. In this way, the pin 200 is pulled free from the interference fit and the cup opening 414 accommodates the pin 200.

[0143] Referring now to FIGS 9C through 9F, the integral nut cap 400 can be stepped, closed, or combinations thereof. For example, as illustrated in FIG. 9C, the base cup portion 410 and the nut cap portion 420 have the same outer diameter so that the integral nut cap 400 has a uniform construction. That is, the integral nut cap 400 has a uniform outer diameter along the entirety of the integral nut cap 400. The nut cap portion 420 includes a nut coverQBM00091243.1 23 790063.02531426 in FIG. 9C that closes the outer end of the nut cap portion 420. Thus, when the pin 200 is inserted in the cup opening 414, the pin 200 is closed off from the outside environment. In other examples, such as illustrated in FIG. 9D, the base cup portion 410 has a larger outer diameter than the nut cap portion 420 so that the integral nut cap 400 has a stepped construction. In other examples, such as illustrated in FIG. 9E, the nut opening 424 extends through the nut end 422 so that the integral nut cap 400 is open on both the cup end 412 and the nut end 422. In other examples, such as illustrated in FIG. 9F, the integral nut cap 400 has a stepped configuration and is open on both the cup end 412 and the nut end 422.

[0144] It is also contemplated that the integral nut cap can include an engagement feature on the nut cover configured to allow driving of the integral nut cap by a power or non-power tool, such as an impact driver. Referring ahead to FIG. 49, another exemplary embodiment of an integral nut cap 1800 is shown, having parts that are generally parallel to the integral nut cap 400 shown in FIGS. 9A through 9F. In this example, however, the integral nut cap 1800 includes a nut cap portion 1820 having a nut cover 1826 with an engagement feature 1850 on the nut cap portion 1820. Unless indicated otherwise, the components, functionality, and advantages of the integral nut cap 400 illustrated in FIGS. 9A through 9F apply similarly to the illustrated example in FIG. 49. Correspondingly, similar components and features of the “400” series of reference numerals are denoted in the "1800" series of reference numerals, unless otherwise provided.

[0145] In some examples, the integral nut cap 1800 includes the nut cover 1826 that extends from the nut cap portion 1820 and extends over the threaded end 206 of the pin 200. As such, the integral nut cap 1800 houses the threaded end 206 of the pin 200 so that the threaded end 206 does not protrude out of the integral nut cap 1800. This protects the threaded end 206 from dust and debris from the outside environment. In some examples, the nut cap portion 1826 and the nut cover 1826 include an external hex geometry.

[0146] In some examples, the nut cap portion 1826 includes the engagement feature 1850 that is configured to engage with a power or non-power tool, such as an impact driver. In some examples, the nut cover 1826 includes the engagement feature 1850. In some examples, such as the illustrated example, the engagement feature 1850 is a recess. The recess has an internally rectangular shape that is configured to directly mate with a power tool, such as an impact driver 1860. In some examples, the recess has an internally square shape configured to mate with theQBM00091243.1 24 790063.02531impact driver 1860. By allowing the integral nut cap 1800 to directly mate with the impact driver 1860, the integral nut cap 1800 also serves the role of a socket. Thus, the integral nut cap 1800 reduces the need for the user to provide a socket.

[0147] Referring back to FIGS. 10 through 19, another exemplary embodiment of a chain assembly 500 is shown, having parts that are generally parallel to the chain assembly 100 of FIGS. 1 through 4 (e.g., pins, inner links, and outer sidebars). In this example, however, a threaded cup 510 can be used to facilitate both assembly and disassembly of the chain assembly 500 by flipping the orientation of the threaded cup 510. FIG. 10 illustrates the threaded cup 510 engaged with the pin 200 during assembly of the chain assembly 500, and FIG. 11 illustrates the threaded cup 510 engaged with the pin 200 during disassembly of the chain assembly 500. During assembly, the threaded cup 510 is fit onto the pin 200 in a first orientation, and during disassembly, the threaded cup 510 is fit onto the pin 200 a second orientation different than the first orientation. Accordingly, the threaded cup 510 is operable for both assembly and disassembly of the chain assembly 500, with its function determined by the orientation in which the threaded cup 510 engages the pin 200.

[0148] Referring to FIGS. 12 through 15, the threaded cup 510 has a hexagonal main body 512 which allows the threaded cup 510 to be driven by a variety of power and non-power tools (e.g., wrench, socket with ratchet, nut driver, etc.). The main body 512 extends between a first end face 514 (i.e., bottom axial end face) and a second end face 516 (i.e., top axial end face) which are parallel with one another. The main body 512 defines an axial opening 518 that extends partially through the main body 512. In some examples, the axial opening 518 extends through a center of the main body 512. The main body 512 further defines a threaded axial opening 520 that extends partially through the main body 512. In some examples, the threaded axial opening 520 has a smaller cross-sectional area than a cross-sectional area of the axial opening 518. In the illustrated example, the axial opening 518 cuts in from the first end face 514 toward the second end face 516, and the threaded axial opening 520 cuts in from the second end face 516 toward the first end face 514. Since the axial opening 518 and the threaded axial opening 520 have different cross-sectional areas, a shoulder 522 is defined at the intersection of the axial opening 518 and the threaded axial opening 520. In this way, the axial opening 518, the threaded axial opening 520, and the shoulder 522 can resemble a shape of the pin 200 so that the pin 200 can be received within the openings 518, 520 of the threaded cup 510.QBM00091243.1 25 790063.02531

[0149] During assembly of the chain assembly 500, the threaded cup 510 can be used to form the interference fit between the pin 200 and the outer sidebar 174. With the pin 200 extended through the outer sidebar 176, the inner links 102, 104, and the outer sidebar 174, the threaded cup 510 can be fit onto the pin 200 with the threaded axial opening 520 first receiving the pin 200. Specifically, the threaded axial opening 520 can receive the pin 200 and threadingly engage with the threaded end 206 of the pin 200. When the threaded cup 510 is tightened, the threaded cup 510 moves along the pin 200 from the threaded end 206 toward the head end 204 until the second end face 516 contacts the outer sidebar 174 which blocks further advancement of the threaded cup 510. When the threaded cup 510 is further tightened, the threaded cup 510 transmits force to the outer sidebar 174, and the pin 200 is pulled through the bore of the outer sidebar 174 to create an interference fit. The pin 200 cannot be further pulled through, and thus the threaded cup 510 cannot be further tightened, when the threads on the threaded end 206 extend past the threads of the threaded axial opening 520, or when the main body 202 of the pin 200 contacts the second end face 516 of the threaded cup 510.

[0150] Referring now to FIG. 16, during disassembly of the chain assembly 500, the threaded cup 510 can be used to remove the pin 200 from the interference fit formed between the pin 200 and the outer sidebar 174. With the threaded end 206 of the pin 200 extended through the outer sidebar 174, the threaded cup 510 can be fit onto the pin 200 with the axial opening 518 first receiving the pin 200. The pin 200 is received within the axial opening 518 and then is received by and threadingly engages with the threaded axial opening 520. When the threaded cup 510 is tightened, the threaded cup 510 moves along the pin 200 from the threaded end 206 toward the head end 204 until the first end face 514 contacts the outer sidebar 174 which blocks further advancement of the threaded cup 510. When the threaded cup 510 is further tightened, the first end face 514 transmits a force against the outer sidebar 174 and pulls the pin 200 through the bore of the outer sidebar 174. Since the first end face 514 contacts the outer sidebar 174, the threaded axial opening 520 is spaced a distance 524 from the outer sidebar 174, which allows the threads of the threaded axial opening 520 to threadingly engage with the threads of the pin 200 for further advancement of the pin 200 through the bore 184 of the outer sidebar 174. In this way, the axial opening 518 is positioned to receive the main body 202 of the pin 200 while the pin 200 is pulled from the interference fit. The pin 200 cannot be further pulled through, and thus the threaded cup 510 cannot be further tightened, when theQBM00091243.1 26 790063.02531main body 202 of the pin 200 contacts the shoulder 522 of the threaded cup 510, which blocks further advancement of the pin 200. When this occurs, the pin 200 is already dislodged from the chain assembly 500, disassembling the chain assembly 500.

[0151] In some examples, the threaded cup 510 can include grooves 526, 528 formed on respective end faces 514, 516 to receive and retain a lubricant such as grease. The grooves 526, 528 provide a lubricant reservoir so that a consistent film of lubricant remains in the interface between the threaded cup 510 and adjacent components (e.g., the outer sidebar 174). In doing so, the grooves 526, 528 reduce friction during operation between the threaded cup 510 and the outer sidebar 174, thereby lowering the torque required for assembly and disassembly of the chain assembly 500. Since the threaded cup 510 is configured such that the first end face 514 contacts the outer sidebar 174 during disassembly and the second end face 516 contacts the outer sidebar 174 during assembly, the threaded cup 510 includes grooves 526, 528 on each end face 514, 516. In some examples, the grooves 526, 528 are annular grooves that extend around the openings 518, 520 of the threaded cup 510. In other examples, the grooves 526, 528 can be a plurality of grooves that surround the openings 518, 520 of the threaded cup 510.

[0152] In some examples, to further reduce friction between the threaded cup 510 and other components of the chain assembly 500, the main body 512 of the threaded cup 510 can include chamfered corners 530 where the hexagonal sides meet the first end face 514 and the second end face 516. The chamfered corners 530 minimize edge contact and stress concentration during tightening and loosening operations and create a smooth transition between the hexagonal main body 512 and the first end face 514 and the second end face 516.

[0153] In some examples, the chain assembly 500 includes protection to guard against contaminants entering the interface between the pin 200 and the threaded cup 510. Debris and particulate matter can accumulate on the threaded end 206 of the pin 200 and the threaded cup 510. When debris accumulates in the threads, the debris can prevent the threaded cup 510 and the pin 200 from properly engaging. This can lead to increased friction, misalignment, or even failure to assemble or disassemble the chain assembly. To address this potential issue, the chain assembly 500 can include a protective cap 540 as depicted in FIGS. 17, 18A-18D, and 19 that is configured to cover the threaded end 206 of the pin 200 and the threaded cup 510, creating a barrier that prevents contaminants from reaching the threads. This protection helpsQBM00091243.1 27 790063.02531maintain the integrity of the threads of the pin 200 and the threaded cup 510, ensuring proper engagement during assembly and disassembly.

[0154] The protective cap 540 includes a cap body 542 extending between an outer cap end 544 and an inner cap end 546. A cap recess 548 extends inward from the inner cap end 546 defining an internal cavity. A cross-sectional area of the cap recess 544 is at least as large as the cross-sectional area of the threaded end 206 of the pin 200 so that the cap recess 548 is configured to receive the threaded end 206 of the pin 200. The cap recess 548 defines an internal wall surface 550 perpendicular to the cap ends 544, 546 and an internal stop surface 552 parallel to the cap ends 544, 546. When positioned for use in the chain assembly 500, the outer cap end 544 faces the external environment and acts as a barrier to debris and contaminates from entering the threaded region while the inner cap end 546 faces the chain assembly 500. In some examples, the outer cap end 544 and the inner cap end 546 have a circular shape and the cap body 542 has a cylindrical or disc shape.

[0155] The protective cap 540 can be coupled to the chain assembly 500 in a variety of ways, including to the pin 200 or to the threaded cup 510. In some examples, the protective cap 540 may be threadingly engaged with the pin 200 to couple the protective cap 540 to the chain assembly 500. Referring to FIG. 18A, the internal wall surface 550 includes threads that are configured to threadingly engage the pin 200. When the protective cap 540 is fit onto the threaded end 206 of the pin 200 and is tightened, the protective cap 540 moves along the pin 200 from the threaded end 206 toward the head end 204. The protective cap 540 continues along the pin 200 until the protective cap 540 is blocked from further advancement. In some examples, the inner cap end 546 contacts the first end face 514 of the threaded cup 510 which blocks further advancement of the protective cap 540 along the pin 200. In other examples, the internal stop surface 552 contacts the threaded end 206 of the pin 200 which blocks further advancement of the protective cap 540 along the pin 200. In some examples, such as the illustrated example, the protective cap 540 is configured so that the inner cap end 546 contacts the first end face 514 of the threaded cup 510 when the internal stop surface 552 contacts the threaded end 206 of the pin 200 so that both contacts block the protective cap 540 from further advancement along the pin 200. That is, the cap recess 544 has a depth 562 that corresponds to a length that the pin 200 extends past the first end face 514 of the threaded cup 510.QBM00091243.1 28 790063.02531

[0156] In some examples, the protective cap 540 couples to the threaded cup 510. For example, the protective cap 540 can threadingly engage with the threaded cup 510 to couple the protective cap 540 to the chain assembly 500. Referring to FIG. 18B, the inner cap end 546 includes an outer groove 554 that extends around a periphery of the protective cap 540. In some examples, the outer groove 554 includes threads 556 that threadingly engage with corresponding threads 558 of the threaded cup 510. In other examples, such as the illustrated example in FIG. 18C, the outer groove 554 is shaped to nest into the threaded cup 510. Yet, in other examples, such as the illustrated example in FIG. 18D, the outer groove 554 includes an internal groove 560 to receive a corresponding ridge 564 of the threaded cup 510. Yet, in other examples, such as the illustrated example in FIG. 19, the protective cap 540 can be used to cover the chain assembly 300 in FIGS. 6 through 8. Accordingly, the protective cap 540 can be used to cover chain assemblies including the cup 310.

[0157] Referring now to FIGS. 20 through 23b, an embodiment of a pin assembly 600 is shown, to be assembled in a chain assembly similar to the chain assembly 100 of FIGS. 1 through 4. In this example, however, the pin does not have external threading on either end of the pin. Without the extended external threads, the pin can have a lower mass while the chain assembly is in-use and between assembly, disassembly, and repair of the chain assembly. By lacking external threads, the pin is also better protected from the outside environment (e.g., dust, debris, corrosion, etc.), which can damage external threads, making assembly and disassembly more difficult. However, despite these drawbacks of external threads, external threads provide benefits such as allowing for greater axial forces to be generated on the pin, which can aid the user in assembling and disassembling the chain assembly. External threads of a pin are also less likely to be damaged (e.g., strip) when using a power tool to tighten or loosen the pin. Accordingly, there is a desire to combine the benefits of pins without external threads and pins having external threads.

[0158] A pin assembly can include an adapter that effectively transforms a pin without external threads into a pin having external threads. The adapter engages the pin via an engagement feature on the pin and the adapter. A user can provide such an adapter when the user desires to assemble, disassemble, or replace a pin in the chain assembly. Accordingly, during assembly, disassembly, and repair of the pin, the user can attach the adapter to the pin so that the pin can accept greater axial forces with reduced risk of stripping the threads, and,QBM00091243.1 29 790063.02531during operation of the chain assembly, the user can detach the adapter from the pin so that the pin can be lighter weight and better protected from the outside environment.

[0159] Referring now to FIGS. 20, 21A, and 21B, the pin assembly 600 includes a pin 610 having a first pin end 612 and a second pin end 614 opposite the first pin end 612. The pin 610 includes an engagement feature on either end 612, 614. In the illustrated example, the engagement feature is configured as internal threading so that the first pin end 612 has a first threaded recess 616 and the second pin end 614 has a second threaded recess 618.

[0160] To provide external threads for the pin 610, a pin adapter 620 can be provided to engage with the engagement feature. Here, the pin adapter 620 includes a pin engaging shaft 622 having external threads that are configured to threadingly engage the threaded recesses 616, 618. To enable the pin adapter 620 and the pin 610 to engage with each other, the pin engaging shaft 622 has a cross-sectional area corresponding to a cross-sectional area of the threaded recesses 616, 618. The pin adapter 620 further includes a pin extender 624 coupled to the pin engaging shaft 622. In some examples, the pin engaging shaft 622 and the pin extender 624 are integrally formed as a unitary construction. The pin extender 624 includes external threading and is configured to engage with assembly and disassembly components (e.g., nuts, thrust-cups, washers, etc.). In some examples, the pin extender 624 of the pin adapter 620 has a cross-sectional area greater than the pin engaging shaft 622 but less than the cross-sectional area of the pin 610. When the pin adapter 620 couples to the pin 610, the pin extender 624 extends a length of the pin 610.

[0161] In some examples, such as the illustrated example in FIG. 21 A, the pin adapter 620 can include a mid-body section that can be driven with power and non-power tools (e.g., an impact driver, wrench, etc.). In the illustrated example, the mid-body section is configured as a hex 626 coupled to the pin extender 624. When the pin adapter 620 includes the hex 626, the user can direct force to the hex 626 rather than the pin extender 624 during assembly, disassembly, and repair of the chain assembly. While the illustrated example in FIGS. 20 and 20b depict the pin adapter 620 as having a mid-body section configured as the hex 626, it is also contemplated that the pin adapter 620 does not include a mid-body section (see FIG. 21 A). In those examples, the pin extender 624 can engage with another component during assembly and disassembly of the chain assembly.QBM00091243.1 30 790063.02531

[0162] By providing an adapter to the pin, the user can include thread sizes of driving components during assembly, disassembly, and repair that are not constrained by the cross-sectional shape / size of the bores of the outer sidebar. For example, referring to FIGS. 22, 23 A, and 23B, the pin extender 624 has a larger cross-sectional area than the pin 610, the pin engaging shaft 622, and the bore 184 of the outer sidebar 174. This allows the pin extender 624, when engaging with assembly and disassembly components, to generate greater axial forces during assembly, disassembly, and repair of the chain assembly, while not being constrained by the shape and size of the bore of the outer sidebar. In some examples, the pin adapter 620 includes a mid-body section (see FIG. 23 A, the pin adapter includes mid-body section configured as hex 626), and in other examples, the pin adapter 620 does not include a mid-body section (see FIG. 23B).

[0163] With continued reference to FIGS. 23 A and 23B, in some examples, the pin adapter 620 includes a driving recess 628 on an end of the pin extender 624. As such, the pin adapter 620 can optionally be driven by a power tool, such as an impact driver, to drive the pin adapter 620 to couple to the pin 610. That is, the driving recess 628 can engage an impact driver to couple the pin adapter 620 to the pin 610 by threadingly engaging the pin engaging shaft 622 with the threaded recess 616. With forward reference to FIG. 49, the driving recess 628 has many of the same advantages discussed below as the engagement feature 1850.

[0164] In some examples, there is a desire to include engagement features that are easier to clean (e g., remove debris and contaminants) to extend the life span of the pin and pin adapter. Referring to FIGS. 24 through 25B, another embodiment of a pin assembly 700 is shown, similar to the pin assembly 600 of FIGS. 20 through 23B. In this example, however, a pin 710 includes engagement features on either pin end 712, 714 configured as tongues 716, 718 (i.e., a male engagement portion). Correspondingly, a pin adapter 720 includes an engagement feature configured as a groove 722 (i.e., a female engagement portion) that allows the pin adapter 720 to engage with the tongues 716, 718 and couple to the pin 710. Together, the tongues 716, 718 of the pin ends 712, 714 engage with the groove 722 of the pin adapter 720 as “dovetail” features. Tongues and grooves allow for simplified assembly, disassembly, and repair of the chain assembly since the pin adapter 720 can be coupled to the pin 710 via a hand of the user. Further, tongues and grooves are lower cost to machine or cold-head than internal and external threads, which saves in production cost. While the illustrated example inQBM00091243.1 31 790063.02531FIGS. 24, 25 A, and 25B depict the pin ends 712, 714 as having the tongues 716, 718 and the pin adapter 720 as having the groove 722, it is also contemplated that the pin ends have grooves and the pin adapter has a tongue. Further, while the illustrated example in FIGS. 24, 25 A, and 25B depict the tongues 716, 718 as being formed from an extrusion cut made circumferentially around the pin ends 712, 714, the tongues 716, 718 can also be formed from a straight extruded cut on a face of the pin ends 712, 714 (see FIGS. 39 through 42 for an example of the tongues formed via a straight extruded cut).

[0165] In some examples, the pin adapter 720 can include a pin extender 724 that includes threads in a similar fashion as the pin extender 624 of the pin assembly 600. Also similarly, the pin extender 724 can have a variety of cross-sectional areas not constrained by the shape / size of the bore of the outer sidebar. For example, as illustrated in FIG. 25A, the cross-sectional area of the pin extender 724 can be smaller than the cross-sectional area of the pin 710 and smaller than the cross-sectional area of the bore 184 of the outer sidebar 174. In other examples, as illustrated in FIG. 25B, the cross-sectional area of the pin extender 724 can be larger than the cross-sectional area of the pin 710 and larger than the cross-sectional area of the bore 184 of the outer sidebar 174.

[0166] Turning now to FIGS. 26 through 28, yet another embodiment of a pin assembly 800 is shown, similar to the pin assembly 700 of FIGS. 24 through 25B. In this example, however, a pin 810 and a pin adapter 820 include engagement features that each contain at least one groove (i.e., at least one female engagement portion) and at least one tongue (i.e., at least one male engagement portion). In the illustrated example, the pin 810 has engagement features on either end 812, 814 that include a first tongue 816a, 818a and a second tongue 816b, 818b separated by a middle groove 816c, 818c. Correspondingly, the pin adapter 820 has an engagement feature including a first groove 822a and a second groove 822b separated by a middle tongue 822c. As such, the pin 810 and the pin adapter 820 are configured to couple to one another via their respective tongues and grooves.

[0167] Turning now to FIG. 29, another embodiment of a pin assembly 900 is shown, similar to the pin assembly 600 of FIGS. 20 through 23B. In this example, however, a pin 910 includes an engagement feature on a pin end 912 that is configured as an adhesive surface 916. The adhesive surface 916 includes an adhesive strong enough, such as epoxy, acrylic, polyurethane, etc., to couple the pin 910 to the pin adapter 920. In some examples, the pinQBM00091243.1 32 790063.02531adapter 920 can correspondingly include an adhesive surface 922. Thus, the pin end 912 and the pin adapter 920 can couple to one another via their respective adhesive surfaces to couple the pin 910 to the pin adapter 920.

[0168] Turning now to FIG. 30, another embodiment of a pin assembly 1000 is shown, similar to the pin assembly 600 of FIGS. 20 through 23B. In this example, however, a pin 1010 includes an engagement feature on a pin end 1012. A pin insert 1030 is configured to couple to the engagement feature on the pin end 1012. In some examples, the pin insert 1030 includes a pin engaging shaft 1032 having threads and the engagement feature on the pin end 1012 is configured as a threaded recess 1016. As such, the pin insert 1030 can threadingly engage the threaded recess 1016.

[0169] Continuing with FIG. 30, the pin insert 1030 further includes an engagement feature coupled to the pin engaging shaft 1032 for engaging with and coupling to a pin adapter 1020. When the pin engaging shaft 1032 is threadingly engaged with the pin 1010, the engagement feature of the pin insert 1030 faces away from the pin 1010. In some examples, the engagement feature of the pin insert 1030 is configured as a magnet 1034. Correspondingly, the pin adapter 1020 can include a magnet 1022 configured to engage with the magnet 1034 of the pin insert 1030, which allows the pin adapter 1020 to couple to the pin 1010 via magnetic coupling with the pin insert 1030.

[0170] Referring now to FIG. 31, another embodiment of a chain assembly 1100 is shown, similar to the chain assembly 100 of FIGS. 1 through 4, however the chain assembly 1100 includes a locking device or stake 1102 that can be implemented with the previously mentioned chain assemblies to prevent loosening of a fastener / cup / nut 1104 on the threaded end 206 of the pin 200 during operation of the chain assembly. The locking device 1100 acts as a rotational stop by physically contacting the fastener 1104, thereby blocking rotation of the fastener 1104. In the illustrated example, a cross-sectional shape of the locking device 1102 is circular, however, it is also contemplated that a cross-sectional shape of the locking device 1102 is square, rectangular, hexagonal, or any other shape.

[0171] The locking device 1102 is coupled to the outer sidebar 174 of the chain assembly 1100 and extends away from the outer sidebar 176. In some examples, the outer sidebar 174 includes a locking device opening 1110 that is configured to receive the locking device 1102. For example, the locking device 1102 can be a pin (e.g., roll pin, spring pin, dowel pin, groovedQBM00091243.1 33 790063.02531pin, taper pin, cotter pin, hitch pin, lynch pin, clevis pin, detent pin, etc.) and the locking device opening 1110 is configured to receive the pin. In other examples, the locking device 1102 is threaded (e.g., a cap screw, setscrew, etc.) and the locking device opening 1110 is correspondingly threaded to receive the locking device 1102. In some examples, the locking device opening 1110 is a through-hole that extends entirely through the outer sidebar 174. In other examples, the locking device opening 1102 extends partially through the outer sidebar 174.

[0172] In some examples, to disengage the locking device 1102 from the chain assembly 1100, force can be applied directly to the fastener 1104 using a tool, such as a wrench or impact driver. The force must be large enough that it can overcome the counteractive force of the locking device 1102 and rotate the fastener 1104 free. In other examples, to disengage the locking device 1102 from the chain assembly 1100, the locking device 1102 can be removed from the outer sidebar 174, to eliminate the physical stop preventing rotation of the fastener 1104. When the locking device 1102 is removed, the fastener 1104 can be loosened manually or with a tool. By offering multiple disassembly options, the chain assembly 1100 gives operators flexibility to choose the most practical method for their situation and ensures that disassembly can be completed efficiently under different field conditions, while still maintaining control and safety throughout the process.

[0173] Turning now to FIGS. 32 through 36, another embodiment of a chain assembly 1200 is shown, similar to the chain assembly 100 of FIGS. 1 through 4. In this example, however, the chain assembly 1200 includes a rotational stop washer 1210 that is fit onto a pin 1202 and advanced toward the outer sidebar 174. A fastener 1220 is also fit onto the pin 1202 so that the rotational stop washer 1210 is positioned between the outer sidebar 174 and the fastener 1220. It is noted that, in the exploded view, all outer tabs on the washer should actually be radially extended outward and they are only bent in the axial direction once the washer 1210 has been secured in place by the fastener 1220 to help prevent the fastener 1220 from loosening via rotation.

[0174] Referring now to FIGS. 34 and 35, the pin 1202 has a main body 1203 with a head end 1204 and a threaded end 1206 opposite the head end 1204 having threads. The pin 1202 includes a groove 1208 extending from the threaded end 1206 to a shoulder 1209 of the pin 1202.QBM00091243.1 34 790063.02531

[0175] Referring now to FIG. 36, the rotational stop washer 1210 includes an inner diameter 1212 and an outer diameter 1214. The rotational stop washer 1210 has an annular shape including a washer opening 1211 defined by the inner diameter 1212. In some examples, the inner diameter 1212 is at least as large as a diameter of the threaded end 1206 of the pin 1202. The rotational stop washer 1210 includes an inner diameter tongue 1216 extending radially inward from the inner diameter 1212. The inner diameter tongue 1216 corresponds to a shape and size of the groove 1204 of the pin 1202 so that the inner diameter tongue 1216 can be received by the groove 1208 when the rotational stop washer 1210 is fit onto the pin 1202. The rotational stop washer 1210 includes a set of outer diameter tongues 1218 extending radially outward from the outer diameter 1214. In some examples, the set of outer diameter tongues 1218 includes at least six outer tongues, however, other numbers of tongues are also contemplated. For example, the illustrated example depicts the set of outer diameter tongues 1218 as having twelve tongues. Note that, while the twelve tongues are illustrated with every other one bent, initially all tongues be radially outward (and not bent as depicted) and only then bent in the manner illustrated after assembly.

[0176] When the rotational stop washer 1210 is positioned on the threaded end 1206 of the pin 1202, the groove 1208 receives the inner diameter tongue 1216, and the washer opening 1211 receives the threaded end 1206. This tongue-and-groove engagement between the inner diameter tongue 1216 and the groove 1208 creates a mechanical interlock that prevents relative rotation between the rotational stop washer 1210 and the pin 1202 under normal operating conditions. The rotational stop washer 1210 is advanced axially along the threaded end 1206 toward the head end 1208 until the rotational stop washer 1210 contacts the outer sidebar 174.

[0177] When the fastener 1220 is positioned on the threaded end 1206 of the pin 1202 and is tightened, the fastener 1220 advances toward the head end 1204 until the fastener 1220 contacts the rotational stop washer 1210. At this point, at least portion of the set of outer diameter tongues 1218 are bent around the fastener 1220 form a physical lock, locking the fastener 1220 in place. The bent tongues act as tabs that mechanically restrain the fastener 1220 from rotating relative to the rotational stop washer 1210. Since the washer 1210 is then locked to the pin 1202 via the inner diameter tongue 1216 and groove 1208 interface, and the fastener 1220 is locked to the rotational stop washer 1210 via the bent outer diameter tongues 1218, the pin 1202, the rotational stop washer 1210, and the fastener 1220 are collectivelyQBM00091243.1 35 790063.02531blocked from rotation. Together, these features ensure that the assembly remains secure under vibration, torque loads, and other operational stresses, thereby reducing the risk of loosening during service.

[0178] Turning now to FIGS. 37 and 38, another embodiment of a rotational stop washer 1310 is shown, similar to the rotational stop washer 1210 in FIGS. 32 through 36. In this example, however, instead of the central tab that prevents rotation of the washer relative to the pin, the rotational stop washer 1310 includes a set of slits 1313 extending radially outward from an inner diameter 1312 toward an outer diameter 1314 that form compression elements against the outer surface of the pin once installed. The set of slits 1313 effectively divide the rotational stop washer 1310 into flexible segments that allow the inner diameter 1312 to elastically deform when the rotational stop washer 1310 is installed onto a pin 1302. A washer opening 1311 is dimensioned and configured to receive a threaded end 1306 of the pin 1302, and the set of slits 1313 provide compliance so that the rotational stop washer 1310 can be press-fit onto the pin 1302.

[0179] During installation, the pin 3102 is aligned with the washer opening 1311 and advanced axially through the washer opening 1311. As the pin 1302 passes through the washer opening 1311, the set of slits 1313 enable the inner diameter 1312 to expand slightly, accommodating the pin 1302 while maintaining a high -friction interface between the rotational stop washer 1310 and the pin 1302. This frictional engagement creates a locking effect that resists relative rotation between the rotational stop washer 1310 and the pin 1302 under operational loads. The set of slits 1313 also allow the rotational stop washer 1310 to exert a radial clamping force on the pin 1302, further enhancing the anti -rotation lock.

[0180] Referring to FIG. 38, when the rotational stop washer 1310 is fully seated against the outer sidebar 174, the elastic deformation caused by the set of slits 1313 results in the rotational stop washer 1310 adopting a slightly bowed or conical shape. This bowing generates axial preload between the rotational stop washer 1310 and the adjacent components, which increases the locking force and prevents loosening. The combination of radial clamping from the set of slits 1313 and axial preload from the bowing effect creates a locking mechanism that secures the pin 1302 in place without additional fastening components. Again, once the washer 1310 is compressed between the sidebar and some variety of nut or fastener during installation, some or all of the tabs 1318 can be bent up to prevent the loosening of the fastener / nut.QBM00091243.1 36 790063.02531

[0181] In some examples, there is a desire to include an alignment feature that aids the user in aligning a pin with a respective pin adapter. Alignment features ensure that the pin adapter is received correctly on the pin to reduce the risk of improper engagement which could lead to uneven load distribution and a shortened life span of the pin and pin adapter. Alignment features also can improve efficiency of the user during installation, which is especially valuable in field repairs where time and accessibility are limited.

[0001] Referring to FIGS. 39 through 42, another embodiment of a pin assembly 1400 is shown, similar to the pin assembly 700 of FIGS. 24 through 25B. Unless indicated otherwise, the components, functionality, and advantages of the pin assembly 700 illustrated in FIGS. 24 through 25B apply similarly to the illustrated example in FIGS. 39 through 42. Correspondingly, similar components and features of the “700” series of reference numerals are denoted in the "1400" series of reference numerals, unless otherwise provided.

[0182] In this example, a pin 1410 includes a pin alignment feature 1430. Correspondingly, a pin adapter 1420 includes an adapter alignment feature 1440. In some examples, the pin alignment feature 1430 is located on the engagement feature of the pin 1410, and the adapter alignment feature 1440 is located on the engagement feature of the pin adapter 1420. For example, the pin alignment feature 1430 can be located on a tongue 1416 of the pin 1410, and the adapter alignment feature 1440 can be located on a groove 1422 of the pin adapter 1420.

[0183] The pin alignment feature 1430 is positioned on the pin 1410 and the adapter alignment feature 1440 is positioned on the pin adapter 1420, such that when the pin 1410 engages with the pin adapter 1420, the pin alignment feature 1430 aligns with the adapter alignment feature 1440. That is, when the engagement feature of the pin 1410 engages with the engagement feature of the pin adapter 1420, the pin alignment feature 1430 aligns with the adapter alignment feature 1440. In some examples, the pin alignment feature 1430 is located along a rotational axis 1432 of the pin 1410. Correspondingly, the adapter alignment feature 1440 is located along a rotational axis 1442 of the pin adapter 1420. Accordingly, the alignment features 1420, 1430 are configured to assist the user in aligning the rotational axis 1432 of the pin 1410 with the rotational axis 1442 of the pin adapter 1420.

[0184] In some examples, the adapter alignment feature 1440 is a spring-activated ball nestled into the pin 1420. For example, the adapter alignment feature 1440 includes an adapterQBM00091243.1 37 790063.02531recess 1446 located on the groove 1422 of the pin adapter 1420. The adapter recess 1446 receives at least a portion of an alignment ball 1444. The alignment ball 1444 is coupled to a biasing member 1448, which biases the alignment ball 1444 to an extended position. In the extended position, the alignment ball 1444 protrudes from the adapter recess 1446 past a surface of the groove 1422. A retaining member 1450 that is received in the adapter recess 1446 blocks the alignment ball 1444 from entirely removing from the adapter recess 1446.

[0185] The pin alignment feature 1430 includes a pin recess 1432. The pin recess 1432 has a cross-sectional area smaller than a cross-sectional area across a diameter of the alignment ball 1444. As such, the alignment ball 1444 can be partially, but not entirely, received within the pin recess 1432.

[0186] When the pin 1410 (e.g., the tongue 1416 of the pin 1410) engages the pin adapter 1420 (e.g., the groove 1422 of the pin adapter 1420), a surface of the tongue 1416 contacts a surface of the groove 1422. As the tongue 1416 slides into alignment with the groove 1422, the surface of the tongue 1416 engages with the alignment ball 1444 and forces the alignment ball 1444 into the recess 1446 to a retracted position. The biasing member 1448 compresses as the alignment ball 1444 moves from the extended position to the retracted position. When the rotational axis 1432 of the pin 1410 and the rotational axis 1442 of the pin adapter 1420 are aligned, the biasing member 1448 biases the alignment ball 1444 towards the extended position. The alignment ball 1444 is biased toward the extended position until the alignment ball 1444 contacts an edge between the pin recess 1432 and the surface of the tongue 1416. is blocked by the pin recess 1432. In other words, a portion of the alignment ball 1444 is received within the pin recess 1432. Since the cross-sectional area of the alignment ball 1444 is larger than the cross-sectional area of the pin recess 1432, the alignment ball 1444 cannot be received entirely within the pin recess 1432 and is partially seating within the pin recess 1432. This engagement between the alignment ball 1444 and the pin recess 1432 resists axial and rotational movement between the pin 1410 and the pin adapter 1420 and indicates that the pin 1410 and the pin adapter are correctly aligned along rotational axes 1432, 1442.

[0187] Referring now to FIGS. 43 through 46, other alternative embodiments of the disclosure include a washer assembly to alleviate axial loads present after the pin and sidebar form an interference fit during assembly. Building upon the prior discussion of the chain assembly 300 with the cup 310 and the nut 330, and the integral nut cap 400, such a cup-as-a-QBM00091243.1 38 790063.02531press member concepts result in significant pre-load on the cup device at the end of the assembly procedure. This pre-load can create challenges during disassembly, such as galling, and there may be a desire to reduce this pre-load. To address these issues, a washer assembly with anti-galling properties can be used in the chain assembly systems discussed herein.

[0188] The chain assembly system 1500 includes a washer assembly 1510 that is configured to be positioned between a fastener 1560 and an outer sidebar 174 before the fastener 1560 is tightened onto a pin 200 of the chain assembly system 1500. While the illustrated example shows the washer assembly 1510 used in the chain assembly 1500 with the fastener 1560 depicted as an integral nut cap, it is contemplated that the washer assembly 1510 can be used in other chain assembly systems.

[0189] The washer assembly 1510 includes a first washer 1520 and a second washer 1540. The first washer 1520 comprises an annular body having a first side 1522 and a second side 1524 and defining a central opening 1526 configured to receive the pin 200. The annular body extends radially between the central opening 1526 and an outer periphery 1528. A plurality of steps 1530 are disposed along the outer periphery 1528 and extend from the annular body on the first side 1522. The plurality of steps 1530 are spaced apart from one another surrounding the central opening 1526. In some examples, each of the plurality of steps 1530 include a first sub-step 1530a, a second sub-step 1530b, and a third sub-step 1530c. A height of the first substep 1530a is less than a height of the second sub-step 1530b and the height of the second substep 1530b is less than a height of the third sub-step 1530c.

[0190] The plurality of steps 1530 of the first washer 1520 are configured to couple to a washer having a corresponding plurality of steps. For example, the second washer 1540 is substantially similar to the first washer 1520. The second washer 1540 comprises an annular body having a third side 1542 and a fourth side 1544. The third side 1542 includes a plurality of steps 1550 having a first sub-step 1550a, a second sub-step 1550b, and a third sub-step 1550c. A height of the first sub-step 1550a is less than a height of the second sub-step 1550b and the height of the second sub-step 1550b is less than a height of the third sub-step 1550c. Accordingly, the first washer 1520 and the second washer 1540 are configured to couple to one another when the first side 1522 of the first washer 1520 engages with the third side 1542 of the second washer 1540.QBM00091243.1 39 790063.02531

[0191] The first washer 1520 and the second washer 1540 can rotate relative to one another to move the washer assembly 1510 between a spaced configuration and a compressed configuration. The plurality of steps 1530, 1550 of the washers 1520, 1540 align differently depending on the configuration. For example, when the washer assembly 1510 is in the spaced configuration, the first sub-step 1530a of the first washer 1520 is spaced from the first sub-step 1550a of the second washer 1540, the second sub-step 1530b of the first washer 1520 contacts the third sub-step 1550c of the second washer 1540, and the third sub-step 1530c of the first washer 1520 contacts the second sub-step 1550b of the second washer 1540. When the washer assembly 1510 is in the compressed configuration, the first sub-step 1530a of the first washer 1520 contacts the third sub-step 1550c of the second washer 1540, the second sub-step 1530b of the first washer 1520 contacts the second sub-step 1550b of the second washer 1540, and the third sub-step 1530c of the first washer 1520 contacts the first sub-step 1550a of the second washer 1540. In some examples, the plurality of steps 1530 of the first washer 1520 and the plurality of steps 1550 of the second washer 1540 are flush with one another when the washer assembly 1510 is in the compressed configuration.

[0192] In operation, the washer assembly 1510 is fit onto the end of the pin 200. The washer assembly 1510 is slid toward the head end of the pin 200 until the second side 1524 of the first washer 1520 contacts the outer sidebar 174. The fastener 1560 is fit onto the end of the pin 200, and as the fastener 1560 moves toward the head end of the pin 200, the fastener 1560 contacts the washer assembly 1510 (e.g., the fourth side 1544 of the second washer 1540). The washer assembly 1510 is positioned between the fastener 1560 and the outer sidebar 174 and maintains space between the fastener 1560 and the outer sidebar 174. When the fastener 1560 is rotated in a tightening direction 1562, the second washer 1540 is rotated relative to the first washer 1520 due to axial pre-load being stored in the washer assembly 1510 and frictional force with the fastener 1560. As such, the washer assembly 1510 is moved to the spaced configuration, as illustrated in FIG. 44. In the spaced configuration, the washer assembly 1510 includes spaces and is configured to transmit axial load from the outer sidebar 174 to the fastener 1560 through the washer assembly 1510. The washer assembly 1510 stores the axial pre-load when in the spaced configuration. When the fastener 1560 is rotated in a loosening direction 1564, the axial pre-load is released and the second washer 1540 is rotated relative to the first washer 1520 to move the washer assembly 1510 to the compressed configuration, asQBM00091243.1 40 790063.02531illustrated in FIG. 45. Tn the compressed configuration, the plurality of steps 1550 of the second washer 1540 and the plurality of steps 1530 of the first washer 1520 interlock, and an axial gap 1570 is formed between the washer assembly 1510 and the fastener 1560. That is, the axial gap 1570 is formed between the fourth side 1544 of the second washer 1540 and the fastener 1560. Since the axial gap 170 is between the washer assembly 1510 and the fastener 1560, the washer assembly 1510 does not transmit axial load from the outer sidebar 174 to the fastener 1560. As such, the fastener 1560 can continue to be rotated in the loosening direction 1564 to remove the fastener 1560 from the pin 200 with a relatively low amount of force. Accordingly, by positioning the washer assembly 1510 between the fastener 1560 and the outer sidebar 174, axial loads from the outer sidebar 174 can be eliminated after the fastener 1560 is loosened a relatively small amount.

[0193] Referring to FIG. 46, in some examples, the washer assembly 1510 includes a biasing member 1580 between the first washer 1520 and the second washer 1540. Since the biasing member 1580 is between the first washer 1520 and the second washer 1540, the biasing member 1580 biases the first washer 1520 and the second washer 1540 in opposing axial directions. In other words, the biasing member 1580 exerts a force that moves the first washer 1520 and the second washer 1540 apart from one another. Accordingly, the biasing member 1580 can provide a self-resetting feature for the washer assembly 1510. That is, the biasing member 1580 can move the washer assembly 1510 from the compressed configuration to the spaced configuration without input from a user.

[0194] In operation, when the washer assembly 1510 is in the spaced configuration and the fastener 1560 is rotated in the loosening direction 1564, the axial pre-load is released. This causes the second washer 1540 to rotate relative to the first washer 1520 to move the washer assembly 1510 to the compressed configuration. The axial gap 1570 allows the fastener 1560 to be removed from the pin 200 with relative ease. As the washer assembly 1510 moves to the compressed configuration, the plurality of steps 1530, 1550 interlock and the first washer 1520 and the second washer 1540 move toward each other, compressing the biasing member 1580. The biasing member 1580 forces the first washer 1520 and second washer 1540 in opposing directions, automatically moving the washer assembly 1510 to the spaced configuration. Accordingly, the biasing member 1580 allows the washer assembly 1510 to return to theQBM00091243.1 41 790063.02531spaced configuration without input from the user while allowing the fastener 1560 to be loosened with a relatively small amount of force.

[0195] Referring now to FIGS. 47A through 48B, a pin extender assembly 1600, with features similar to the chain assembly 1500 in FIGS. 43 through 46. However, in this example, rather than being discrete and separate components, the pin extender assembly 1600 includes a pin adapter 1610, a fastener 1620, and an internal assembly 1630, including a washer assembly 1632, that are formed as an integral unit having a same central axis 1640. The pin extender assembly 1600 is configured to move between a retracted position where an external threading 1611 of the pin adapter 1610 are entirely contained within an end of the fastener 1620 and an extended position where the external threads 1611 of the pin adapter 1610 extend past the end of the fastener 1620. The pin adapter 1610 is like the pin adapter 700, except where expressly stated differently. The fastener 1620 is like the integral nut cap 400, except where expressly stated differently. The washer assembly 1632 is like the washer assembly 1510, except where expressly stated differently.

[0196] The pin extender assembly 1600 includes the pin adapter 1610 that is configured to engage with a pin to facilitate assembly and disassembly of a chain assembly. The pin adapter 1610 has an engagement feature 1613 on a pin engaging end 1612 and external threading 1611 on a pin extending end 1614 opposite the pin engaging end 1612. In some examples, the external threading 1611 extends from the engagement feature 1613 to the pin extending end 1614. The pin adapter 1610 includes an adapter shoulder 1616 located on a position between the pin extending end 1614 and the pin engaging end 1612. The adapter shoulder 1616 has a first side 1616a proximal to the external threading 1611 and a second side 1616b proximal to the engagement feature 1613. In some examples, the adapter shoulder 1616 is positioned between the engagement feature 1613 and the external threading 1611. The adapter shoulder 1616 extends outward from the pin adapter 1612. In some examples, the engagement feature 1613 is configured as a dovetail shape.

[0197] The external threading of the pin adapter 1610 threadingly engages threads 1621 of the fastener 1620 to couple the pin adapter 1610 to the fastener 1620. The fastener 1620 includes a cup portion 1622 and a nut portion 1624 having threads 1621 integrally formed together. The cup portion 1622 defines a cup opening 1623 and the nut portion 1624 defines a nut opening 1624. The cup portion 1622 includes a cup shoulder 1626 protruding into theQBM00091243.1 42 790063.02531cup opening 1622, which, in some examples, helps retain the internal assembly 1630 of the pin extender assembly 1600 (e.g., washers, bearings, retaining rings, thrust rings, etc.). In some examples, the cup opening 1623 has a cross-sectional area that is larger than a cross-sectional area of the nut opening 1625. Since the cross-sectional area of the cup opening 1623 is larger than the cross-sectional area of the nut opening 1625, a nut shoulder 1628 is defined where the cup portion 1622 and the nut portion 1624 meet. The nut shoulder 1628 is configured to engage with the adapter shoulder 1616 (e.g., the first side 1616a of the adapter shoulder 1616) when the pin extender assembly 1600 is in the extended position, as will be discussed in greater detail below. In some examples, the fastener 1620 includes a recess 1629. In some examples, the recess 1629 is configured to receive at least one component of the internal assembly 1630.

[0198] The fastener 1620 houses at least a portion of the internal assembly 1630. In some examples, the internal assembly 1630 is coupled to the fastener 1620. The internal assembly 1630 includes the washer assembly 1632 and a thrust ring 1634. The thrust ring 1634 includes a notch 1635 that is configured to engage with the adapter shoulder 1616 (e.g., the second side 1616b of the adapter shoulder 1616), as will be described in greater detail below. In some examples, the internal assembly 1630 includes a thrust bearing 1636 to support axial loads and reduce friction. In some examples, the thrust bearing 1636 is positioned between the washer assembly 1632 and the thrust ring 1634. In some examples, the thrust bearing 1636 is a needle bearing sub-assembly, a single-sided Duralon Thrust Washer, a double-sided Duralon Thrust Washer, etc. In some examples, the internal assembly 1630 includes a retaining ring 1638 that can be received in the recess 1629. In some examples, the retaining ring 1638 defines a first end of the internal assembly 1630 and the cup shoulder 1626 defines a second end of the internal assembly 1630. That is, in some examples, the internal assembly 1630 is held within a space defined between the recess 1629 and the cup shoulder 1626.

[0199] Referring to FIG. 47A, the pin extender assembly 1600 is in the retracted position. The notch 1635 of the thrust ring 1634 engages the second face of the adapter shoulder 1616 and the fastener 1620 (e g., the nut portion 1624 of the fastener 1620) extends past the external threading of the pin adapter 1610. Since the notch 1635 engages the adapter shoulder 1616, the adapter shoulder 1616 blocks the fastener 1620 and the internal assembly 1630 from moving toward the pin extending end 1614 of the pin adapter 1610. The engagement feature extends past the fastener 1620 and the internal assembly 1630 so that the pin adapter assemblyQBM00091243.1 43 790063.025311600 (e.g., the pin adapter 1610) is configured to engage with a pin having a corresponding engagement feature.

[0200] To move the pin extender assembly 1600 from the retracted position to the extended position, the fastener 1620 is rotated about the central axis 1640. As the fastener 1620 rotates about the central axis 1640, the fastener 1620 moves from the pin extending end 1614 towards the pin engaging end 1612. When the fastener 1620 (e.g., the nut shoulder 1628) engages with the shoulder 1616 of the pin adapter 1610, the shoulder 1616 blocks the fastener 1620 from further advancement.

[0201] Referring to FIG. 47B, the pin extender assembly 1600 is in the extended position. The nut shoulder 1628 of the fastener 1620 engages the first face of the adapter shoulder 1616 and fastener 1620 (e.g., the cup portion 1624 of the fastener 1620) extends past the engagement feature of the pin adapter 1610. Since the nut shoulder 1628 engages the adapter shoulder 1616, the adapter shoulder 1616 blocks the fastener 1620 and the internal assembly 1630 from moving toward the pin engaging end 1612 of the pin adapter 1610. The external threading extends past the fastener 1620.

[0202] Since the internal assembly 1630 includes the washer assembly 1632 which includes similar features as the washer assembly 1510 as discussed above, the discussion above with regard to the washer assembly 1510 and the chain assembly 1500 applies to the pin extender assembly 1600 here.

[0203] It is also contemplated that the internal assembly can be externally coupled to the fastener to allow a user increased accessibility to the components of the internal assembly. Referring now to FIGS. 48 A and 48B, another exemplary embodiment of a pin extender assembly 1700 is shown, having parts that are generally parallel to the pin extender assembly 1600 of FIGS. 47A and 48B. In this example, however, an external assembly 1730 replaces the internal assembly 1630 and the pin extender assembly 1700 includes different structures to block movement of the pin extender assembly 1700. Unless indicated otherwise, the components, functionality, and advantages of the pin extender assembly 1700 illustrated in FIGS. 47A and 47B apply similarly to the illustrated example in FIGS. 48A and 48B. Correspondingly, similar components and features of the “1600” series of reference numerals are denoted in the "1700" series of reference numerals, unless otherwise provided.QBM00091243.1 44 790063.02531

[0204] A pin adapter 1710 includes an extension portion 1718 between external threads 1721 of the pin adapter 1710 and a pin extending end 1714. In some examples, the pin adapter 1710 further includes an adapter recess 1719. In some examples, the pin recess 1719 is positioned on the extension portion 1738. An adapter retaining ring 1750 is received within the pin recess 1719. The adapter retaining ring 1750 is configured to engage a fastener 1730 when the pin extender assembly 1700 is in the retracted position to block further movement of the fastener 1730 towards the pin extending end 1714.

[0205] The fastener 1730 includes a cup shoulder 1726 on an external surface of the fastener 1730. In some examples, the cup shoulder 1726 is on the cup portion 1722 of the fastener 1730. In some examples, the fastener 1730 includes a recess 1729 positioned on the external surface of the fastener 1730. As such, the external assembly 1730 is positioned external to the fastener 1730. This allows increased accessibility for a user during operation.

[0206] Since the internal assembly 1730 includes a washer assembly 1732 which includes similar features as the washer assembly 1510 as discussed above, the discussion above with regard to the washer assembly 1510 and the chain assembly 1500 applies to the pin extender assembly 1700 here.

[0207] It is also contemplated that the pin adapter has internal threading rather than external threading and that the fastener includes a bolt having external threading, rather than a nut portion, to engage with the internal threading of the pin adapter. Referring now to FIGS.50A through 50C, another exemplary embodiment of a pin extender assembly 1900 is shown, having parts that are generally parallel to the pin extender assembly 1600 of FIGS. 47A and 48B. In this example, however, the pin extender assembly 1900 includes a pin adapter 1910 having internal threading 1911 extending along the pin adapter 1910 from a pin extending end 1914 towards a pin engaging end 1912 rather than external threading. Also, the pin extender assembly 1900 includes a fastener 1920 having a bolt 1924 and a fastener shoulder 1928 rather than a nut portion and a nut shoulder. Unless indicated otherwise, the components, functionality, and advantages of the pin extender assembly 1600 illustrated in FIGS. 48 A and 48B apply similarly to the pin extender assembly 1900 illustrated in example FIGS. 50A through 50C. Correspondingly, similar components and features of the “1600” series of reference numerals are denoted in the "1900" series of reference numerals, unless otherwise provided.QBM00091243.1 45 790063.02531

[0208] The fastener 1920 includes the bolt 1924, which has external threading 1925a and a bolt head 1925b. The external threading 1925a extends from an adapter engaging end 1925c to the bolt head 1925b. The external threading 1925a is configured to threadingly engage with the internal threading 1911 of the pin adapter 1910. In some examples, the bolt head 1925b has a hexagonal shape configured to engage with a power or non-power tool to rotate the bolt 1924 about a central axis 1940.

[0209] Referring to FIG. 50A, with the pin extender assembly 1900 in a retracted position, the external threading 1925a of the bolt 1924 proximal to the adapter engaging end 1925c threadingly engages with the internal threading 1911. As such, an engagement feature 1913 of the pin adapter 1910 protrudes from the fastener 1920 and an internal assembly 1930. Similar to the pin extender assembly 1600, a thrust ring 1934 of the internal assembly 1930 (e.g., a notch 1935 of the thrust ring 1934) contacts an adapter shoulder 1916 of the pin adapter 1910 (e.g., a second side 1916b of the adapter shoulder 1916) to block further movement of the fastener 1920 and the internal assembly 1930 towards the pin extending end 1914.

[0210] To move the pin extender assembly 1900 from the retracted position to an extended position, the fastener 1920 (e.g., the bolt 1924) is rotated along the central axis 1940 and the fastener 1920 moves towards the pin engaging end 1912 of the pin adapter 1910. The fastener 1920 continues toward the pin engaging end 1912 until a first side 1928a of the fastener shoulder 1928 contacts the pin extending end 1914 of the pin adapter 1910 in the extended position. Referring to FIG. 50B, in the pin extended position, the first side 1928a contacts the pin extending end 1914 and a second side 1928b of the fastener shoulder 1928 contacts the bolt head 1924b. As such, the bolt 1924 is blocked from further advancement towards the pin engaging end 1912.

[0211] Since an internal assembly 1930 includes a washer assembly 1932 which includes similar features as the washer assembly 1510 as discussed above, the discussion above with regard to the washer assembly 1510 and the chain assembly 1500 applies to the pin extender assembly 1900 here. Referring to FIG. 50C, it is also contemplated that the internal assembly 1930 can includes other washers, such as aDuralon thrust washer, and include any combination of the components described with respect to the internal assembly 1630.

[0212] While the pin extender assembly 1900 is illustrated as a sub-assembly, it is also contemplated that the components in the pin extender assembly 1800 (e.g., the washerQBM00091243.1 46 790063.02531assembly, fastener, pin adapter, bolt, etc.) can be separate components as described in the chain assembly system 1500 shown in FIGS. 43 through 46.

[0213] Accessory systems that connect to the pin adapters described herein are also contemplated. In some examples, the accessory system can provide anti-torque qualities when connected to the pin adapters. In doing so, the accessory system can be attached to one end of the pin (i.e., one of the adapters of the pin) while the other pin end is worked on. In doing so the pin is prevented from rotating while working on the opposite end of the pin. In some examples, the accessory systems can also provide a system that holds the pin adapters during user transport.

[0214] Referring to FIGS. 51 and 52, an accessory system 2000 is shown. The accessory system 2000 includes a main accessory body 2010 that extends from a first end 2012 to a second end 2014. The main accessory body 2010 has a first side 2016 configured to engage a sidebar of a chain assembly and a second side 2018 opposite the first side 2016 that is configured to face away from a sidebar of a chain assembly. In some examples, the main accessory body 2010 has a rectangular prism shape, although other shapes are also contemplated. The first side 2016 includes a groove 2020 that is configured to receive at least one pin end having an engagement feature (e.g., a tongue of a pin in a chain assembly) and block the pin end from rotating. In some examples, the groove 2020 extends from the first end 2012 to the second end 2014. In some examples, the groove 2020 is substantially straight. The second side 2018 of the main accessory body 2010 includes a handle 2022. In some examples, the handle 2022 includes an ergonomic grip for a user of the main accessory body 2010.

[0215] In operation, the groove 2020 receives a first pin end protruding through an outer sidebar of a chain assembly. The groove 2020 receives the first pin end on the first end 2012 of the main accessory body 2010. The main accessory body 2010 slides toward a second pin end protruding through the outer sidebar of the chain assembly. The groove 2020 receives the first pin end on the first end 2012 of the main accessory body 2010. As a result, the first pin end and the second pin end are both received in the groove 2020. Since the groove 2020 is substantially straight, the pin ends are prevented from rotating about the axis of the pin. As such, the accessory system 2000 can be used when working on the opposite ends of the first and second pins to prevent the pins from rotating while attaching and detaching pin adapters on the opposite end.QBM00091243.1 47 790063.02531

[0216] The present disclosure has described one or more preferred embodiments, and it should be appreciated that many equivalents, alternatives, variations, and modifications, aside from those expressly stated, are possible and within the scope of the invention.

[0217] It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The disclosure is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms “mounted,” “connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, “connected” and “coupled” are not restricted to physical or mechanical connections or couplings.

[0218] As used herein, unless otherwise limited or defined, discussion of particular directions is provided by example only, with regard to particular embodiments or relevant illustrations. For example, discussion of “top,” “front,” or “back” features is generally intended as a description only of the orientation of such features relative to a reference frame of a particular example or illustration. Correspondingly, for example, a “top” feature may sometimes be disposed below a “bottom” feature (and so on), in some arrangements or embodiments. Further, references to particular rotational or other movements (e.g., counterclockwise rotation) is generally intended as a description only of movement relative a reference frame of a particular example of illustration.

[0219] Certain operations of methods according to the disclosure, or of systems executing those methods, may be represented schematically in the figures or otherwise discussed herein. Unless otherwise specified or limited, representation in the figures of particular operations in particular spatial order may not necessarily require those operations to be executed in a particular sequence corresponding to the particular spatial order. Correspondingly, certain operations represented in the figures, or otherwise disclosed herein, can be executed in different orders than are expressly illustrated or described, as appropriate for particular embodiments of the disclosure. Further, in some embodiments, certain operations can beQBM00091243.1 48 790063.02531executed in parallel, including by dedicated parallel processing devices, or separate computing devices configured to interoperate as part of a large system.

[0220] In some implementations, devices or systems disclosed herein can be utilized or installed using methods embodying aspects of the disclosure. Correspondingly, description herein of particular features, capabilities, or intended purposes of a device or system is generally intended to inherently include disclosure of a method of using such features for the intended purposes, a method of implementing such capabilities, and a method of installing disclosed (or otherwise known) components to support these purposes or capabilities. Similarly, unless otherwise indicated or limited, discussion herein of any method of manufacturing or using a particular device or system, including installing the device or system, is intended to inherently include disclosure, as embodiments of the disclosure, of the utilized features and implemented capabilities of such device or system.

[0221] As used herein, unless otherwise defined or limited, ordinal numbers are used herein for convenience of reference based generally on the order in which particular components are presented for the relevant part of the disclosure. In this regard, for example, designations such as “first,” “second,” etc., generally indicate only the order in which the relevant component is introduced for discussion and generally do not indicate or require a particular spatial arrangement, functional or structural primacy or order.

[0222] As used herein, unless otherwise defined or limited, directional terms are used for convenience of reference for discussion of particular figures or examples. For example, references to downward (or other) directions or top (or other) positions may be used to discuss aspects of a particular example or figure, but do not necessarily require similar orientation or geometry in all installations or configurations.

[0223] This discussion is presented to enable a person skilled in the art to make and use embodiments of the disclosure. Various modifications to the illustrated examples will be readily apparent to those skilled in the art, and the generic principles herein can be applied to other examples and applications without departing from the principles disclosed herein. Thus, embodiments of the disclosure are not intended to be limited to embodiments shown, but are to be accorded the widest scope consistent with the principles and features disclosed herein and the claims below. The following detailed description is to be read with reference to the figures, in which like elements in different figures have like reference numerals. The figures,QBM00091243.1 49 790063.02531which are not necessarily to scale, depict selected examples and are not intended to limit the scope of the disclosure. Skilled artisans will recognize the examples provided herein have many useful alternatives and fall within the scope of the disclosure.

[0224] Various features and advantages of the disclosure are set forth in the following claims.QBM00091243.1 50 790063.02531

Claims

1. CLAIMSWhat is claimed is:

1. A chain assembly system comprising:an inner chain link defining an inner bore;an outer sidebar defining an outer bore;a pin comprising a body, a head end, and a threaded end opposite to the head end and having threads;a cup having an opening configured to receive the threaded end of the pin external to the outer sidebar; anda nut configured to threadingly engage the threads of the threaded end of the pin external to the cup;wherein the threaded end of the pin is configured to be:inserted through the inner bore and the outer bore that are aligned, inserted through the opening of the cup that is configured to be externally positioned to the outer sidebar, andthreadingly engaged with the nut that is configured to be externally positioned relative to the cup; andwherein when the nut is threadingly engaged with the threaded end of the pin, the pin is pulled from an interference fit between the pin and the outer sidebar to disassemble the chain assembly system.

2. The chain assembly of claim 1, wherein the cup has a first length measured along an axis of the pin and the outer sidebar has a second length measured along the axis of the pin,wherein the first length is greater than or equal to the second length.

3. The chain assembly of claim 1, wherein when the pin is pulled from the interference fit, the body of the pin is received in the opening of the cup.QB\100091243.1 51 790063.025314. The chain assembly of claim 3, wherein as the nut is further tightened, the pin is further removed from the interference fit until a shoulder of the cup contacts the body of the pin to block further advancement.

5. The chain assembly of claim 1, wherein the cup and the nut are integrally formed as an integral nut cap having a cup portion and a nut portion.

6. The chain assembly of claim 5, wherein the integral nut cap has a unitary diameter along an entirety of the integral nut cap.QBM00091243.1 52 790063.025317. A fastener configured to assemble and disassemble a chain link assembly, wherein the fastener includes:a main body extending between a first end face and a second end face;a first opening that extends partially through the main body from the first end face; a second opening that extends partially through the main body from the second end face, the second opening having threads, the first opening and the second opening intersecting with one another and extending an axial length of the main body; anda shoulder defined where the first opening and the second opening intersect, wherein, to form a press-fit between a pin and an outer sidebar of the chain link assembly, the second end face contacts the outer sidebar of the chain link assembly, and wherein, to remove the press-fit between the pin and the outer sidebar of the chain link assembly, the first end face contacts the outer sidebar of the chain link assembly.

8. The fastener of claim 7, wherein at least one of the first end face and the second end face includes a groove that extends around at least one of the first opening and the second opening.

9. The fastener of claim 7, wherein the main body has a hexagonal shape and includes chamfered corners where the main body meets at least one of the first end face and the second end face.

10. The fastener of claim 7, wherein the second end face contacts the main body of the pin and blocks the pin from further advancement when the press-fit is formed.

11. The fastener of claim 7, wherein the shoulder contacts the main body of the pin and blocks the pin from further advancement when the press-fit is removed.QBM00091243.1 53 790063.0253112. A method of assembling and disassembling a chain link assembly with a fastener, the method comprising:providing the fastener comprising:a main body extending between a first end face and a second end face, a first opening that extends partially through the main body from the first end face, anda second opening that extends partially through the main body from the second end face, the second opening having threads;during assembly of the chain link assembly:inserting a pin through aligned bores of an inner link and an outer sidebar; threadingly engaging the threads of the second opening with the pin, advancing the fastener along the pin until the second end face contacts the outer sidebar, andtransmitting axial force through the second end face to draw the main body of the pin through a bore of the outer sidebar to form a press-fit between the pin and the outer sidebar; andduring disassembly:inserting the pin through the first opening of the fastener,threadingly engaging the pin with the threads of the second opening, advancing the fastener along the pin until the first end face contacts the outer sidebar; andtransmitting axial force through the first end face to pull the pin from the bore of the outer sidebar to remove the press-fit.QBM00091243.1 54 790063.0253113. A chain assembly system comprising:an inner chain link defining an inner bore;an outer sidebar defining an outer bore;a pin comprising a body, a head end, and a threaded end opposite to the head end and having threads;a fastener including:a main body extending between a first end face and a second end face;a first opening that extends partially through the main body from the first end face; anda second opening that extends partially through the main body from the second end face, the second opening having threads; anda cap coupled to the first end face of the fastener, the cap covering the second opening and the pin.

14. The chain assembly system of claim 13, wherein the cap extends between a first end and a second end, the first end having an internal recess configured to receive the threaded end of the pin.

15. The chain assembly system of claim 14, wherein the internal recess includes threads configured to threadingly engage with the threaded end of the pin to couple the cap to the pin.

16. The chain assembly system of claim 14, wherein the cap includes a groove that extends around a periphery of the cap,wherein the groove is configured to receive a portion of the main body of the fastener to couple the cap to the fastener.

17. The chain assembly system of claim 16, wherein the groove includes a first set of threads and the main body of the fastener includes a second set of threads,wherein the first set of threads are configured to threadingly engage with the second set of threads.QBM00091243.1 55 790063.0253118. The chain assembly system of claim 13, wherein the cap includes a recess configured to receive a power tool to drive the cap.QBM00091243.1 56 790063.0253119. A chain assembly system comprising:an inner chain link defining an inner bore;an outer sidebar defining an outer bore;a pin comprising a first pin end and a second pin end opposite to the first pin end, the first pin end having a first engagement feature; anda pin adapter comprising a pin engaging portion having a second engagement feature and a pin extender portion opposite the pin engaging portion;wherein the pin extender portion includes external threads; andwherein the first engagement feature of the first pin end is configured to engage with the second engagement feature of the pin adapter thereby coupling the pin and the pin extender and providing the pin with external threading.

20. The chain assembly system of claim 19, wherein the first engagement feature is a threaded recess and the second engagement feature is external threading configured to threadingly engage with the threaded recess.

21. The chain assembly system of claim 19, wherein a cross-sectional area of the external threading of the pin extender is larger than a cross-sectional area of the pin.

22. The chain assembly system of claim 21, wherein the cross-sectional area of the external threading of the pin extender is larger than a cross-sectional area of the outer bore.

23. The chain assembly system of claim 19, wherein one of the first engagement feature and the second engagement feature includes a tongue and the other one of the first engagement feature and the second engagement feature includes a groove,wherein the groove is configured to receive the tongue to couple the pin to the pin adapter.QBM00091243.1 57 790063.0253124. A chain assembly system comprising:an inner chain link defining an inner bore;an outer sidebar defining an outer bore;a pin comprising a body, a head end, and a threaded end opposite to the head end and having threads, the pin including a groove extending from the threaded end of the pin;a washer comprising:a washer opening defined by an inner diameter, the washer opening configured to receive the threaded end of the pin,a first tongue extending radially inward from the inner diameter, an outer diameter defining a periphery of the washer, anda second tongue extending radially outward from the outer diameter; and a fastener configured to threadingly engage the threads of the threaded end of the pin external to the washer;wherein the groove of the pin receives the first tongue when the washer opening receives the threaded end of the pin thereby locking relative rotation between the washer and the pin; andwherein the second tongue is configured to be bent around the fastener thereby locking relative rotation between the washer and the fastener.

25. The chain assembly system of claim 24, wherein the washer opening and the threaded end of the pin form a clearance fit when the washer opening receives the threaded end of the pin.QBM00091243.1 58 790063.0253126. A method of preventing rotation of a pin and a fastener in a chain link assembly, the method comprising:inserting a pin having a threaded end and a groove through aligned bores of an inner link and an outer sidebar;positioning a washer on the threaded end of the pin such that a first tongue of the washer engages the groove to lock rotation between the washer and the pin;threadingly engaging a fastener with the threaded end of the pin external to the washer; andbending a second tongue of the washer around the fastener to lock rotation between the washer and the fastener.

27. The method of claim 26, wherein the second tongue is one of a set of second tongues.QBM00091243.1 59 790063.0253128. A pin assembly configured to be used for disassembly of a chain assembly, the pin assembly comprising:a pin extending along a pin axis, the pin including a pin end having a tongue and a first alignment feature; anda pin adapter extending along a pin adapter axis, the pin adapter including:a groove configured to receive the tongue,a second alignment feature, andexternal threading opposite the groove,wherein the first alignment feature engages with the second alignment feature when the pin axis and the pin adapter align.

29. The pin assembly of claim 28, wherein the first alignment feature is on the tongue, the first alignment feature including a first recess, andwherein the second alignment feature is on the groove, the second alignment feature including a ball at least partially received within a second recess.

30. The pin assembly of claim 29, wherein when the groove receives the tongue and the pin rotational axis and the pin adapter rotational axis align, a biasing member biases the ball and the first recess receives at least a portion of the ball.QBM00091243.1 60 790063.0253131. A chain assembly system for assembling a chain link, the chain assembly system including:an inner sidebar having an inner bore;an outer sidebar having an outer bore;a pin extending through the inner bore and the outer bore;a washer assembly having a first washer coupled to a second washer, the washer assembly configured to be fit onto an end of the pin external to the outer sidebar; anda fastener configured to be fit onto an end of the pin external to the washer assembly; wherein the first washer includes a first plurality of steps and the second washer includes a second plurality of steps, andwherein the first plurality of steps is configured to engage with the second plurality of steps.

32. The chain assembly system of claim 31, wherein the first plurality of steps includes:a first sub-step having a first height,a second sub-step having a second height, the second height being greater than the first height, anda third sub-step having a third height, the third height being greater than the second height.

33. The chain assembly system of claim 31, wherein as the fastener is rotated along a rotational axis of the pin in a first direction, the washer assembly moves to a spaced configuration, andwherein as the fastener is rotated along the rotational axis of the pin in a second direction opposite the first direction, the washer assembly moves to a compressed configuration.

34. The chain assembly system of claim 33, wherein an axial gap is defined between the fastener and the washer when the washer assembly moves to the compressed configuration.QBM00091243.1 61 790063.0253135. The chain assembly system of claim 31 , wherein the washer assembly includes a biasing member positioned between the first washer and the second washer.

36. The chain assembly system of claim 34, wherein the washer assembly includes a biasing member positioned between the first washer and the second washer, and wherein the biasing member is configured to move the washer assembly to the spaced configuration from the compressed configuration.QBM00091243.1 62 790063.0253137. A pin extender assembly configured to engage a pin of a chain assembly, the pin extender assembly comprising:a pin adapter extending along a central axis, the pin adapter having a pin engaging end configured to engage with the pin and a pin extending end opposite the pin engaging end and having threads;a fastener configured to threadingly engage with the threads of the pin extending end; andan internal assembly housed within the fastener, the internal assembly including a washer assembly having a first washer coupled to a second washer,wherein the first washer includes a first plurality of steps and the second washer includes a second plurality of steps, andwherein the first plurality of steps is configured to engage with the second plurality of steps.

38. The pin extender assembly of claim 37, wherein the pin adapter, fastener, and internal assembly are arranged in a subassembly configured to engage the pin.

39. The pin extender assembly of claim 38, wherein the internal assembly includes a thrust ring having a notch,wherein the pin adapter includes an adapter shoulder positioned between the pin engaging end and the pin extending end,wherein the fastener includes a fastener shoulder,wherein the pin extender assembly is configured to move between a retracted position where the notch contacts the adapter shoulder and an extended position where the fastener shoulder contacts the adapter shoulder.

40. The pin extender of claim 39, wherein the engagement feature is configured to engage with the pin when in the retracted position, andwherein the threads of the pin adapter extend past the fastener when in the extended position.QBM00091243.1 63 790063.0253141. The pin extender assembly of claim 37, wherein the threads of the pin adapter are internal threads, andwherein the fastener includes a bolt that is configured to threadingly engage with the internal threads of the pin adapter.

42. The pin extender assembly of claim 45, wherein the internal assembly includes a thrust ring having a notch,wherein the pin adapter includes an adapter shoulder positioned between the pin engaging end and the pin extending end,wherein the pin extender assembly is configured to move between a retracted position where the notch contacts the adapter shoulder and an extended position where the fastener contacts the pin extending end.QBM00091243.1 64 790063.0253143. A pin extender assembly configured to engage a pin of a chain assembly, the pin extender assembly comprising:a pin adapter extending along a central axis, the pin adapter having a pin engaging end configured to engage with the pin and a pin extending end opposite the pin engaging end and having threads;a fastener configured to threadingly engage with the threads of the pin extending end; andan external assembly coupled to the fastener, the external assembly including a washer assembly having a first washer coupled to a second washer,wherein the first washer includes a first plurality of steps and the second washer includes a second plurality of steps, andwherein the first plurality of steps is configured to engage with the second plurality of steps.

44. The pin extender assembly of claim 43, wherein the pin adapter, fastener, and external assembly are arranged in a subassembly.

45. The pin extender assembly of claim 44, wherein the pin adapter further includes a recess, the recess configured to receive a retaining ring,wherein the pin adapter includes an adapter shoulder positioned between the pin engaging end and the pin extending end,wherein the fastener includes a fastener shoulder,wherein the pin extender assembly is configured to move between a retracted position where the fastener contacts the retaining ring and an extended position where the fastener shoulder contacts the adapter shoulder.

46. The pin extender of claim 45, wherein the engagement feature is configured to engage with the pin when in the retracted position, andwherein the threads of the pin adapter extend past the fastener when in the extended position.QBM00091243.1 65 790063.0253147. A chain assembly system for blocking rotation of a fastener, the chain assembly system comprising:an inner chain link defining an inner bore;an outer sidebar defining an outer bore and an opening;a pin comprising a body, a head end, and a threaded end opposite to the head end and having threads, the pin being configured to be received through the inner bore and the outer bore;a fastener configured to threadingly engage the threads of the threaded end of the pin external to the outer sidebar; anda locking device configured to be received within the opening of the outer sidebar; wherein the locking device is configured to contact the fastener when the fastener is rotated about a rotational axis, thereby blocking rotation of the fastener.

48. The chain assembly system of claim 47, wherein the locking device is a pin and the opening is a through hole that extends entirely through the outer sidebar.

49. The chain assembly system of claim 47, wherein the opening includes threads and the locking device is configured to threadingly engage with the threads of the opening.

50. The chain assembly system of claim 47, wherein the fastener has a hexagonal shape and the locking device protrudes from the outer sidebar when the opening receives the locking device.QBM00091243.1 66 790063.0253151. A chain assembly system for assembling a chain link, the chain assembly system including:an inner sidebar having an inner bore;an outer sidebar having an outer bore;a pin extending through the inner bore and the outer bore, the pin having an engagement feature on an end of the pin; andan accessory for preventing rotation of the pin, the accessory extending from a first end to a second end, wherein the accessory includes:a first side that is configured to engage the outer sidebar;a second side opposite the first side, the second side including a handle; and a groove on the first side, the groove extending from the first end to the second end, wherein the groove is configured to receive the engagement feature of the pin; andwherein, to prevent rotation of the pin, a user is configured to grasp the handle while the engagement feature of the pin is received by the groove.QBM00091243.1 67 790063.02531

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