Segmented fastener

Abstract

Embodiments of the presently disclosed technology provide a segmented fastener that can be manipulated – segment by segment – into a hole / passage that would otherwise be inaccessible to a single-piece fastener of comparable length due to a small entrance / exit gap for inserting a fastener into the hole / passage. The segmented fastener may comprise a head segment, and one or more shank segments which are hingedly connected to each other. For example, a first shank segment may extend away from the head segment along a first axis. The first axis may correspond with an axial direction of the segmented fastener when all segments are aligned along the first axis. The first shank segment may be hingedly connected to the head segment such that the shank segment is configured to pivot, relative to the head segment, about a second axis perpendicular to the first axis.

Description

SEGMENTED FASTENERCross-Reference to Related Application

[0001] This application claims the benefit of U.S. Provisional Patent Application No. 63 / 555,804, filed on February 20, 2024, which is incorporated herein by reference in its entirety.Field of the Invention

[0002] The present disclosure relates generally to fastener and hardware technologies, and more particularly, some embodiments relate to a segmented fastener.Description of the Related Art

[0003] A fastener is a hardware device that can be used to mechanically join two bodies. Examples of fasteners include pins, screws, bolts, etc.

[0004] Certain fasteners may comprise a head and a shank extending away from the head along a first axis (i.e., along an axial direction of the shank). The head may have a wider diameter than the shank, and may be dimensioned and shaped to receive, or be received by, a fastening tool (e.g., a wrench, a screwdriver, etc.). The fastening tool can be used to rotate / spin the fastener about the first axis thereby driving the fastener into a hole / passage along the first axis. In certain applications, the shank may comprise threads that are received by female threads of the hole / passage in order to secure the fastener within the hole / passage.

[0005] In certain applications, instead of or in addition to mechanically joining two bodies, a fastener can be used as a physical stop for aligning machine components. For example, an alignment fastener (e.g., an alignment pin, alignment bolt, an alignmentscrew, etc.) can be inserted into an alignment hole / passage of an internal combustion engine. When a head of the alignment fastener is flush with a wall of the internal combustion engine, a tip of the alignment fastener (i.e., a distal end of the alignment fastener opposite the head) may define a physical stop for aligning a rotational shaft (e.g., a crankshaft or camshaft) of the internal combustion engine. In other words, components of the rotational shaft may rest against the tip of the alignment fastener during an alignment procedure for the rotational shaft.Brief Summary of Embodiments

[0006] According to various embodiments of the disclosed technology, a segmented fastener is provided. The segmented fastener may comprise: (1) a head segment; and (2) a shank segment extending away from the head segment along a first axis. The shank segment may be hingedly connected to the head segment such that the shank segment is configured to pivot, relative to the head segment, about a second axis perpendicular to the first axis.

[0007] In certain embodiments, the segmented fastener may further comprise a second shank segment extending away from the shank segment along the first axis. The second shank segment may be hingedly connected to the shank segment such that the second shank segment is configured to pivot, relative to the shank segment, about a third axis perpendicular to the first axis.

[0008] In various embodiments, at least one of the shank segment and the second shank segment may comprise a threaded sub-segment.

[0009] In some embodiments, the segmented fastener may further comprise a third shank segment extending away from the second shank segment along the first axis. The third shank segment can be hingedly connected to the second shank segment such that the third shank segment is configured to pivot, relative to the second shank segment, about a fourth axis perpendicular the first axis. In various of these embodiments, the thirdshank segment may comprise a raised sub-segment of wider diameter than the shank segment and the second shank segment.

[0010] In certain embodiments, the shank segment may comprise a prong extending away from the shank segment along the first axis. The second shank segment may then comprise a recess dimensioned to receive the prong when the shank segment and the second shank segment are hingedly connected. In such embodiments, the segmented fastener may further comprise a pin inserted through holes of the prong and holes of the recess when the shank segment and second shank segment are hingedly connected such that the second shank segment is configured to pivot, relative to the shank segment, about the pin.

[0011] In various embodiments, the head segment may comprise a magnet. Magnetic forces of the magnet can attract ferrous elements in the shank segment to pull the head segment and shank segment together and / or resist forces that cause the head segment to pivot relative to the shank segment.

[0012] In some embodiments, the shank segment may comprise a second magnet. Magnetic forces of the second magnet can attract ferrous elements in the second shank segment to pull the shank segment and the second shank segment together and / or resist forces that cause the shank segment to pivot relative to the second shank segment. In certain of these embodiments, magnetic forces of the second magnet can attract ferrous elements in the head segment to pull the head segment and the shank segment together and / or resist forces that cause the head segment to pivot relative to the shank segment. In various embodiments, poles of the first magnet and the second magnet may be aligned with the first axis such that magnetic forces between the first magnet and the second magnet pull the head segment and the shank segment together and / or resist forces that cause the head segment to pivot relative to the shank segment.

[0013] In some embodiments, the head segment may comprise a passage within the head segment in a direction parallel to the first axis. Relatedly, the shank segment may comprise a second passage through the shank in a direction parallel to the first axis. Here, the segmented fastener may further comprise a flexible body inserted through the passageand the second passage when the head segment and the shank segment are hingedly connected. Accordingly, tension forces along the flexible body can pull the head segment and the shank segment together and / or resist forces that cause the head segment to pivot relative to the shank segment.

[0014] In certain embodiments, the segmented fastener may further comprise a spring mechanically attached to the head segment and the shank segment. Accordingly, restoring forces of the spring can pull the head segment and the shank segment together and / or resist forces that cause the head segment to pivot relative to the shank segment. In some of these embodiments, the spring may comprise at least one of a torsion spring, a flat spring, and a tension spring.

[0015] In various embodiments, a length of the segmented fastener may be dimensioned for insertion into an alignment passage of an internal combustion engine for aligning a rotational shaft of the internal combustion engine.

[0016] Other features and aspects of the disclosed technology will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the features in accordance with embodiments of the disclosed technology. The summary is not intended to limit the scope of any inventions described herein, which are defined solely by the claims attached hereto.Brief Description of the Drawings

[0017] The technology disclosed herein, in accordance with one or more various embodiments, is described in detail with reference to the following figures. The figures are provided for purposes of illustration only and merely depict typical or example embodiments of the disclosed technology. These figures are provided to facilitate the reader's understanding of the disclosed technology and shall not be considered limiting of the breadth, scope, or applicability thereof.

[0018] FIG. 1 illustrates an internal combustion engine with an alignment hole / passage through which an alignment fastener may be inserted to align a rotational shaft of the internal combustion engine.

[0019] FIG. 2 illustrates an example segmented fastener, in accordance with various embodiments of the presently disclosed technology.

[0020] FIG. 3 illustrates an exploded view of the example segmented fastener of FIG. 2, in accordance with various embodiments of the presently disclosed technology.

[0021] FIG. 4A illustrates the example segmented fastener of FIG. 2 when assembled and aligned along a first axis, in accordance with various embodiments of the presently disclosed technology.

[0022] FIG. 4B illustrates a cross-section view of the example segmented fastener of FIG. 2 when assembled and aligned along a first axis, in accordance with various embodiments of the presently disclosed technology.

[0023] FIG. 5 illustrates the example segmented fastener of FIG. 2 during a first step of inserting the example segmented fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0024] FIG. 6 illustrates the example segmented fastener of FIG. 2 during a second step of inserting the example segmented fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0025] FIG. 7 illustrates the example segmented fastener of FIG. 2 during a third step of inserting the example segmented fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0026] FIG. 8 illustrates the example segmented fastener of FIG. 2 during a fourth step of inserting the example segmented fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0027] FIG. 9 illustrates the example segmented fastener of FIG. 2 during a fifth step of inserting the example segmented fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0028] FIG. 10 illustrates an example segmented fastener comprising a flexible body to pull segments of the example segmented fastener together and / or resist forces that would cause the segments to pivot relative to each other, in accordance with various embodiments of the presently disclosed technology.

[0029] FIG. 11 illustrates a portion of an example segmented fastener comprising a torsion spring to pull segments of the example segmented fastener together and / or resist forces that would cause the segments to pivot relative to each other, in accordance with various embodiments of the presently disclosed technology.

[0030] FIG. 12 illustrates a portion of an example segmented fastener comprising a flat spring to pull segments of the example segmented fastener together and / or resist forces that would cause the segments to pivot relative to each other, in accordance with various embodiments of the presently disclosed technology.

[0031] FIG. 13 illustrates a portion of an example segmented fastener comprising a tension spring to pull segments of the example segmented fastener together and / or resist forces that would cause the segments to pivot relative to each other, in accordance with various embodiments of the presently disclosed technology.

[0032] FIG. 14 illustrates an example segmented mating fastener, in accordance with various embodiments of the presently disclosed technology.

[0033] FIG. 15 illustrates an exploded view of the example segmented mating fastener of FIG. 14, in accordance with various embodiments of the presently disclosed technology.

[0034] FIG. 16A illustrates the example segmented mating fastener of FIG. 14 when assembled and aligned along a first axis, in accordance with various embodiments of the presently disclosed technology.

[0035] FIG. 16B illustrates a cross-section view of the example segmented mating fastener of FIG. 14 when assembled and aligned along a first axis, in accordance with various embodiments of the presently disclosed technology.

[0036] FIG. 17 illustrates a side elevational view of the example segmented mating fastener of FIG. 14 in which the head segment is pivoted 90 degrees relative to the first axis.

[0037] FIG. 18 illustrates the example segmented fastener of FIG. 14 during a first step of inserting the example segmented mating fastener into a hole / passage of a plate or wall, in accordance with various embodiments of the presently disclosed technology.

[0038] FIG. 19 illustrates the example segmented fastener of FIG. 14 during a second step of inserting the example segmented mating fastener into a hole / passage of a plate or wall, in accordance with various embodiments of the presently disclosed technology.

[0039] FIG. 20A illustrates the example segmented fastener of FIG. 14 during a first step of inserting the example segmented mating fastener through a hole / passage of a second plate or wall and into a hole / passage of a first plate or wall, in accordance with various embodiments of the presently disclosed technology.

[0040] FIG. 20B illustrates the example segmented fastener of FIG. 14 during a second step of inserting the example segmented mating fastener through a hole / passage of a second plate or wall and into a hole / passage of a first plate or wall, in accordance with various embodiments of the presently disclosed technology.

[0041] FIG. 21 illustrates an example segmented smaller-diameterfastener comprising a flexible body to pull segments of the example segmented smaller-diameter fastener together and / or resist forces that would cause the segments to pivot relative to each other, in accordance with various embodiments of the presently disclosed technology.

[0042] FIG. 22 illustrates an exploded view of the example segmented smaller- diameter fastener of FIG. 21, in accordance with various embodiment of the presently disclosed technology.

[0043] FIG. 23A illustrates the example segmented smaller-diameter fastener of FIG.21 when assembled and aligned along a first axis, in accordance with various embodiments of the presently disclosed technology.

[0044] FIG. 23B illustrates a cross-section view of the example segmented smaller- diameter fastener of FIG. 21 when assembled and aligned along a first axis, in accordance with various embodiment of the presently disclosed technology.

[0045] FIG. 24 illustrates the example segmented smaller-diameter fastener of FIG. 21 during a first step of inserting the example segmented smaller-diameter fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0046] FIG. 25 illustrates the example segmented smaller-diameter fastener of FIG. 21 during a second step of inserting the example segmented smaller-diameter fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0047] FIG. 26 illustrates the example segmented smaller-diameter fastener of FIG. 21 during a third step of inserting the example segmented smaller-diameter fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0048] FIG. 27 illustrates the example segmented smaller-diameter fastener of FIG. 21 during a fourth step of inserting the example segmented smaller-diameter fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0049] FIG. 28 illustrates the example segmented smaller-diameter fastener of FIG. 21 during a fifth step of inserting the example segmented smaller-diameter fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0050] FIG. 29 illustrates an example segmented smaller-diameter fastener comprising a plurality of circular ring magnets to pull segments of the example segmented smaller- diameter fastener together and / or resist forces that would cause the segments to pivotrelative to each other, in accordance with various embodiments of the presently disclosed technology.

[0051] FIG. 30 illustrates an exploded view of the example segmented smaller- diameter fastener of FIG. 29, in accordance with various embodiment of the presently disclosed technology.

[0052] FIG. 31A illustrates the example segmented smaller-diameter fastener of FIG. 29 when assembled and aligned along a first axis, in accordance with various embodiments of the presently disclosed technology.

[0053] FIG. 31B illustrates a cross-section view of the example segmented smaller- diameter fastener of FIG. 29 when assembled and aligned along a first axis, in accordance with various embodiment of the presently disclosed technology.

[0054] FIG. 32 illustrates the example segmented smaller-diameter fastener of FIG. 29 during a first step of inserting the example segmented smaller-diameter fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0055] FIG. 33 illustrates the example segmented smaller-diameter fastener of FIG. 29 during a second step of inserting the example segmented smaller-diameter fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0056] FIG. 34 illustrates the example segmented smaller-diameter fastener of FIG. 29 during a third step of inserting the example segmented smaller-diameter fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0057] FIG. 35 illustrates the example segmented smaller-diameter fastener of FIG. 29 during a fourth step of inserting the example segmented smaller-diameter fastener into an alignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0058] FIG. 36 illustrates the example segmented smaller-diameter fastener of FIG. 29 during a fifth step of inserting the example segmented smaller-diameter fastener into analignment hole / passage of the internal combustion engine of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0059] The figures depict various embodiments of the disclosed technology for purposes of illustration only, wherein the figures use like reference numerals to identify like elements. The figures are not exhaustive and do not limit the disclosure or the disclosed embodiments to the precise form disclosed. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated in the figures can be employed without departing from the principles of the disclosed technology described herein.Detailed Description

[0060] Typical fasteners comprise a single, inflexible piece. Such construction can be problematic where length of a (single, inflexible) fastener is longer than an external entrance / exit gap available to insert the fastener into a hole / passage. In such a case, disassembly of various components may be required to create a large enough external entrance / exit gap for inserting the fastener into the hole / passage.

[0061] The above-described problem arises frequently in applications where an alignment fastener (e.g., an alignment pin, alignment bolt, alignment screw, etc.) needs to be inserted into an alignment hole / passage of an internal combustion engine in order to align a rotational shaft (e.g., a crankshaft or camshaft) of the internal combustion engine. Namely, in many cases there is not a sufficiently large external entrance / exit gap for inserting the alignment fastener into the alignment hole / passage. This may be the case because various side attachments of the internal combustion engine obstruct / restrict the external entrance / exit gap. This can also be the case where the internal combustion engine is installed in a machine - and components of the machine obstruct / restrict the external entrance / exit gap for inserting the alignment fastener into the alignment hole / passage. In either case, disassembly of various components (e.g., engine components and / or machine components surrounding the internal combustion engine) may berequired in order to insert the alignment fastener into the alignment hole / passage. This disassembly can result in excess time and labor costs.

[0062] Against this backdrop, embodiments of the presently disclosed technology provide a segmented fastener that can be manipulated - segment by segment - into a hole / passage that would otherwise be inaccessible to a single-piece fastener of comparable length due to a small entrance / exit gap for inserting a fastener into the hole / passage. The segmented fastener may comprise various types of fasteners such as a segmented pin, a segmented bolt, a segmented screw, etc.

[0063] The segmented fastener may comprise a head segment, and one or more shank segments which are hingedly connected to each other. Forexample, a first shank segment may extend away from the head segment along a first axis. The first axis may correspond with an axial direction of the segmented fastener when all segments are aligned along the first axis. The first shank segment may be hingedly connected to the head segment such that the shank segment is configured to pivot, relative to the head segment, about a second axis perpendicular to the first axis.

[0064] It should be understood that the segmented fastener may comprise additional shank segments (e.g., a second shank segment, a third shank segment, a fourth shank segment, etc.). For example, the segmented fastener may comprise a second shank segment extending away from the first shank segment along the first axis. The second shank segment may also be hingedly connected to the first shank segment such that the second shank segment is configured to pivot, relative to the first shank segment, about a third axis perpendicularto the first axis. Here, the third axis may be parallel to the second axis.

[0065] Various components / mechanisms may be used to hingedly connect the segments of the segmented fastener. For example, in certain embodiments the head segment may comprise a prong at a distal end of the head segment (i.e., an end of the head segment proximate to the first shank segment). The first shank segment may comprise a reciprocal recess at a proximal end of the first shank segment (i.e., an end of the first shank segment proximate to the head segment). The recess may be dimensionedto receive the prong of the head segment. The prong and recess may each have holes that define a passage along the second axis (i.e., the axis about which the first shank segment is configured to pivot relative to the head segment). Accordingly, the segmented fastener may further comprise a pin that hingedly connects the head segment with the first shank segment when the pin is inserted through the holes of the prong and the recess along the second axis. Accordingly, the first shank segment may be configured to pivot, relative to the head segment, about the pin.

[0066] E mbodiments may also utilize various components / mechanisms to stabilize the segmented fastener along the first axis. In other words, such components / mechanisms may pull segments together and / or resist forces that would cause segments to pivot relative to each other. For example, a respective segment of the segmented fastener may comprise a magnet. Magnetic forces between the magnet and ferrous elements of an adjacent segment can pull the segments together and / or resist forces that would cause the segments to pivot relative to each other, thereby stabilizing the segmented fastener along the first axis. As another example, each segment may comprise a passage through the segment in a direction parallel to the first axis. The segmented fastener may then further comprise a flexible body (e.g., a string, a flexible band, etc.) that is inserted through the passages of the segments. Tension forces along the flexible body can pull the segments together and / or resist forces that would cause the segments to pivot relative to each other, thereby stabilizing the segmented fastener along the first axis. Springs (e.g., torsion springs, flat springs, tension springs, etc.) mechanically attached between segments can also be used to pull the segments together and / or resist forces that would cause the segments to pivot relative to each other, thereby stabilizing the segmented fastener along the first axis.

[0067] As alluded to above, in various implementations the segmented fastener may be used as an alignment fastener for an engine alignment procedure. Here, when the segments of the segmented fastener are axially aligned along the first axis, they may form a specified length for the engine alignment procedure. Accordingly, when the segmented fastener is inserted within an alignment passage of an internal combustion engine, and thehead segment is flush against a wall of the internal combustion, the distal end of the segmented fastener may provide a physical stop for aligning a rotational shaft (e.g., a crankshaft or camshaft) of the internal combustion engine.

[0068] Before describing embodiments in greater detail in conjunction with the figures, it should be appreciated that express or implied reference in this specification to an embodiment, version, example, instance of the present technology, or the like means that a particular feature, design, structure, method, process, or characteristic described in connection with the embodiment is included in at least one embodiment of the disclosure. The appearance or description of an embodiment in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Moreover, whether or not there is express reference to an embodiment or the like, various features are described, which may be variously combined and included in some embodiments, but also variously omitted in other embodiments. Similarly, various features are described that may be preferences or requirements for some embodiments, but not other embodiments.Alignment Fastener Embodiments

[0069] FIG. 1 illustrates an internal combustion engine 100 with an alignment hole / passage 101 through which an alignment fastener may be inserted to align a rotational shaft of the internal combustion engine. While in the specific example of FIG. 1, internal combustion engine 100 is an internal combustion engine, in various embodiments internal combustion engine 100 may comprise another type of engine that comprises a rotational shaft (e.g., a camshaft or crankshaft) that needs to be aligned. In various other embodiments, the fastener may be used for purposes other than alignment, such as attaching two objects together.

[0070] As depicted, internal combustion engine 100 comprises an alignment hole / passage 101. As alluded to above, an alignment fastener (e.g., an alignment pin, alignment bolt, an alignment screw, etc.) can be inserted into alignment hole / passage 101. When a head of the alignment fastener is flush with a wall of internal combustion engine100, a tip of the alignment fastener (i.e., a distal end of the alignment fastener opposite the head) may define a physical stop for aligning a rotational shaft (e.g., a crankshaft or camshaft) of internal combustion engine 100. In other words, components of the rotational shaft may rest against the tip of the alignment fastener during an alignment procedure for the rotational shaft.

[0071] As alluded to above, in many cases there is not a sufficiently large external entrance / exit gap for inserting the alignment fastener into alignment hole / passage 101. This may be the case because various side attachments of internal combustion engine 100 obstruct / restrict the external entrance / exit gap. This can also be the case where internal combustion engine 100 is installed in a machine - and components of the machine obstruct / restrict the external entrance / exit gap for inserting the alignment fastener into alignment hole / passage 101. In either case, disassembly of various components (e.g., engine components and / or machine components surrounding the internal combustion engine 100) may be required in order to insert the alignment fastener into alignment hole / passage 101. This disassembly can result in excess time and labor costs.

[0072] As alluded to above, and as described in greater detail below, embodiments of the presently disclosed technology address this technical challenge by providing a segmented fastener. The disclosed segmented fastener can be manipulated - segment by segment - into a hole / passage (e.g., alignment hole / passage 101) that would otherwise be inaccessible to a single-piece fastener of comparable length due to a small entrance / exit gap for inserting a fastener into the hole / passage.

[0073] FIG. 2 illustrates an example segmented fastener 200, in accordance with various embodiments of the presently disclosed technology.

[0074] As depicted, segmented fastener 200 comprises five segments: (1) a head segment 201; (2) a first shank segment 202 extending away from the head segment 201 along a first axis (i.e., an axis along the axial direction of segmented fastener 200); (3) a second shank segment 203 extending away from the first shank segment 202 along the first axis; (4) a third shank segment 204 extending away from the second shank segment203 along the first axis; and (5) a fourth shank segment 205 extending away from the third shank segment 204 along the first axis.

[0075] As depicted, in various embodiments at least one of the shank segments of segmented fastener 200 may comprise threads. In the specific example of FIG. 2, first shank segment 202 comprises a threaded sub-segment (such a threaded sub-segment may span the entire length of first shank segment 202, or only a partial length of first shank segment 202). However in other embodiments one or more other shank segments may comprise a threaded sub-segment.

[0076] If segmented fastener 200 were to be inserted into alignment hole / passage 101 of FIG. 1, threaded sub-segment of first shank segment 202 may engage with female threads of alignment hole / passage 101 to secure segmented fastener 200 within alignment hole / passage 101.

[0077] As depicted, in various embodiments at least one of the shank segments of segmented fastener 200 may comprise a raised sub-segment of wider diameter than the other shank segments. In the specific example of FIG. 2, second shank segment 203 includes such a raised sub-segment (such a raised sub-segment may span the entire length of second shank segment 203, or only a partial length of second shank segment 203). In other embodiments one or more other shank segment may comprise a raised subsegment.

[0078] Here, the raised sub-segment of second shank segment 203 may further secure segmented fastener 200 within alignment hole / passage 101 during insertion. This may be because the greater diameter of the raised shank segment engages with interior walls of alignment hole / passage 101 (included threaded interior walls) during insertion. In some embodiments, the raised sub-segment of the second shank segment 203 may be threaded. This threading may facilitate the securing of the segmented fastener 200.

[0079] As alluded to above, each of the segments of segmented fastener 200 may be hingedly connected to each other via pins 206(a)-(d). An example of such hinged connection is depicted in greater detail in conjunction with FIG. 3.

[0080] In various embodiments, the lengths of the segments of the segmented fastener 200 can be dimensioned to accommodate differently sized external entrance / exit gaps for inserting the segmented fastener 200 into a hole / passage. For example, for relatively narrow external entrance / exit gaps, the lengths of the segments of the segmented fastener 200 may be dimensioned to be relatively shorter to account for the relatively narrower external entrance / exit gaps. By contrast, for relatively wide external entrance / exit gaps, the lengths of the segments of the segmented fastener 200 may be dimensioned to be relatively longer. With longer segments, the segmented fastener 200 may require fewer segments and less manipulation, which can make insertion quicker for a user.

[0081] FIG. 3 illustrates an exploded view of the example segmented fastener 200 of FIG. 2, in accordance with various embodiments of the presently disclosed technology.

[0082] As depicted in this exploded view, head segment 201 comprises a prong at its distal end (i.e., an end of head segment 201 proximate to first shank segment 202). First shank segment 202 comprises a recess at its proximal end (i.e., an end of first shank segment 202 proximate to head segment 201). As depicted, the recess of first shank segment 202 is dimensioned to receive the prong of head segment 201.

[0083] F irst shank segment 202 also comprises a prong its distal end. Second shank segment 203 comprises a recess at its proximal end. The recess of second shank segment 203 is dimensioned to receive the prong of first shank segment 202.

[0084] Relatedly, second shank segment 203 also comprises a prong its distal end. Third shank segment 204 comprises a recess at its proximal end. The recess of third shank segment 204 is dimensioned to receive the prong of second shank segment 203.

[0085] Relatedly, third shank segment 204 also comprises a prong its distal end. Fourth shank segment 205 comprises a recess at its proximal end. The recess of fourth shank segment 205 is dimensioned to receive the prong of third shank segment 204.

[0086] As depicted, the prongs and recesses of the segments of segmented fastener 200 each comprise a pair of holes defining a passage along an axis perpendicular to the first axis (i.e., where the first axis is the axis along the axial direction of segmentedfastener). Accordingly, when the prongs of the segments are received within corresponding recesses of the segments, pins 206(a)-(d) may be inserted through the holes of the prongs and the holes of the recesses to hingedly connect the segments together. For example, pin 206(a) may be inserted through the holes of the prong of head segment 201 and the holes of the recess of first shank segment 202 to hingedly connect head segment 201 to first shank segment 202. Accordingly, first shank segment 202 may be configured to pivot, relative to head segment 201, about pin 206(a). As alluded to above, this pivot axis may be perpendicular to the first axis (i.e., the axis along the axial direction of segmented fastener 200).

[0087] P ins 206(a)-(d) may comprise various types of pins such as a solid pin, a slotted pin, a coiled pin, or a threaded pin. Selection of pin type may depend on the overall size of segmented fastener 200. In various embodiments, pins 206(a)-(d) may be press fit into the outer flanges of the recesses, and slip fit into the prongs. In some embodiments, the ends of the pins 206(a)-(d) can be bonded or glued to the outer flanges of the recesses. In such embodiments, central portions of the pins 206(a)-(d) that engage with the prongs may remain unbonded / un-glued to facilitate rotation. In certain embodiments pins 206(a)-(d) may be deformed upon insertion to reduce the likelihood of slipping out during repeated use. For example, a set pin tool can be used to apply force to the ends of the pins upon insertion to deform the ends of the pins so that they cannot slip out.

[0088] It should be understood that FIG. 3 only depicts an example embodiment for hingedly connecting segments of segmented fastener 200 together. For example, in certain embodiments the arrangement of prongs and recesses may be reversed - i.e., head segment 201 may comprise a recess at its distal end, first shank segment may comprise a prong at its proximal end and a recess at its distal end, etc.

[0089] FIG. 3 also depicts an example mechanism for stabilizing segments of segmented fastener 200 along the first axis (i.e., along an axis aligned with the axial direction of segmented fastener 200). In other words, such components / mechanism may resist forces that would cause the segments to pivot relative to each other.

[0090] Namely, as depicted magnets 207(a)-(d) may be inserted into the segments. In some embodiments, the poles of magnets 207(a)-(d) may be aligned along the first axis when inserted. Magnetic forces between magnets 207(a)-(d) (and / or ferrous elements of the segments) can pull the segments together and / or resist forces that would cause the segments to pivot relative to each other, thereby stabilizing segmented fastener 200 along the first axis.

[0091] While magnets / ferrous elements are used in the specific example of FIG. 3, other embodiments may utilize different components / mechanisms for stabilizing segmented fastener 200 along the first axis. For example, FIG. 10 (described in greater detail below) depicts a segmented fastener that utilizes a flexible body inserted through passages of its segments for increased stability. FIGs. 11-13 (described in greater detail below) depict segmented fasteners that utilize springs mechanically connected between segments for a similar stabilizing functioning.

[0092] Before describing FIGs. 4A-4B, it may be noted that in FIG. 3 first shank segment 202 comprises a threaded sub-segment 208 (such a threaded sub-segment may span the entire length of first shank segment 202, or merely a portion of the length of first shank segment 202). Further, second shank segment 203 comprises a raised sub-segment 210 (such a raised sub-segment may span the entire length of second shank segment 203, or merely a portion of the length of second shank segment 203).

[0093] As alluded to above, if segmented fastener 200 were to be inserted into alignment hole / passage 101 of FIG. 1, threaded sub-segment 210 may engage with female threads of alignment hole / passage 101 to secure segmented fastener 200 within alignment hole / passage 101. Relatedly, the wider diameter of raised sub-segment 210 may engage with threaded or non-threaded interior walls of alignment hole / passage 101 to further secure segmented fastener 200 within alignment hole / passage 101.

[0094] Referring now to FIG. 4A, FIG. 4A illustrates the example segmented fastener 200 of FIG. 2 when assembled and aligned along a first axis, in accordance with various embodiments of the presently disclosed technology.

[0095] As depicted in FIG. 4A, fourth shank segment 205 may have a distal end 213. Likewise, head segment 201 may comprise a contact surface 212. In implementations where segmented fastener 200 is inserted in an alignment hole / passage of an internal combustion engine and used for aligning a rotational shaft of the internal combustion engine, distal end 213 may comprise a hard surface that provides a physical stop to the rotational shaft in an engine alignment procedure. Relatedly, during the engine alignment procedure contact surface 212 may be flush against a wall of the internal combustion engine. Accordingly, a length 214 spanning a distance between contact surface 212 and distal end 213 along the first axis (i.e., the axis along the axial direction of segmented fastener 200) may comprise a critical and specified length for the engine alignment procedure.

[0096] FIG. 4B illustrates a cross-section view of the example segmented fastener 200 of FIG. 2 when assembled and aligned along a first axis, in accordance with various embodiments of the presently disclosed technology.

[0097] FIG. 4B can help illustrate how pins 206(a)-(d) and magnets 207(a)-(d) can be inserted into the segments of segmented fastener 200.

[0098] FIG. 5 illustrates the example segmented fastener 200 of FIG. 2 during a first step of inserting segmented fastener 200 into alignment hole / passage 101 of internal combustion engine 100 of FIG. 1, in accordance with various embodiments of the presently disclosed technology.

[0099] As alluded to above, in many cases there is not a sufficiently large external entrance / exit gap for inserting a single-piece alignment fastener into an alignment hole / passage of an internal combustion engine. This may be the case because various side attachments of the internal combustion engine obstruct / restrict the external entrance / exit gap. This can also be the case where the internal combustion engine is installed in a machine - and components of the machine obstruct / restrict the external entrance / exit gap for inserting the alignment fastener into the alignment hole / passage. In either case, disassembly of various components (e.g., engine components and / or machine components surrounding the internal combustion engine) may be required in order toinsert a single-piece alignment fastener into the alignment hole / passage. This disassembly can result in excess time and labor costs.[OOlOOJAs depicted in FIGs. 5-9, an external entrance / exit gap 502 for inserting an alignment fastener into alignment hole / passage 101 is relatively small / narrow due to the presence of a physical body 215 proximate to internal combustion engine 100. In various implementations, physical body 215 may comprise a body that a machine internal combustion engine 100 is installed in and / or a side attachment to internal combustion engine 100.[OOlOlJGiven the narrow size of external entrance / exit gap 502, it would be difficult / impossible to insert a single-piece alignment fastener of comparable length to segmented fastener 200 without removing / disassembling physical body 215. However, as depicted in conjunction with FIGs. 5-9, segmented fastener 200 can be manipulated - segment by segment - into alignment hole / passage 101 without removing / disassembling physical body 215.

[0102] As a first step, segmented fastener 200 may be advanced towards alignment hole / passage 101 along a first axis approximately perpendicular to the passage defined by alignment hole / passage 101. This method of advancement may be necessary in order to avoid physical body 215. As depicted, during such advancement all the segments of segmented fastener 200 may be aligned with the first axis, which may correspond to an axial direction of segmented fastener 200 when all segments are aligned.

[0103] As depicted in FIG. 5, when fourth shank segment 205 is proximate to alignment hole / passage 101, fourth shank segment 205 may be pivoted relative to third shank segment 204 about pin 206(d). Third segment 204, second shank segment 203, first shank segment 202, and head segment 201 may all still align along the first axis at the first step.

[0104] As depicted, once pivoted to align with alignment hole / passage 101, fourth shank segment 205 may be inserted into alignment hole / passage 101.

[0105] FIG. 6 illustrates the example segmented fastener 200 of FIG. 2 during a second step of inserting segmented fastener 200 into alignment hole / passage 101.

[0106] As depicted, when third shank segment 204 is proximate to alignment hole / passage 101, third shank segment 204 may be pivoted relative to second shank segment 203 about pin 206(c). Second shank segment 203, first shank segment 202, and head segment 201 may all still align along the first axis at the second step.

[0107] As depicted, once pivoted to align with alignment hole / passage 101, third shank segment 204 may be inserted into alignment hole / passage 101.

[0108] FIG. 7 illustrates the example segmented fastener 200 of FIG. 2 during a third step of inserting segmented fastener 200 into alignment hole / passage 101.

[0109] As depicted, when second shank segment 203 is proximate to alignment hole / passage 101, second shank segment 203 may be pivoted relative to first shank segment 202 about pin 206(b). First shank segment 202 and head segment 201 may all still align along the first axis at the third step.[OOllOJAs depicted, once pivoted to align with alignment hole / passage 101, second shank segment 203 may be inserted into alignment hole / passage 101.

[0111] FIG. 8 illustrates the example segmented fastener 200 of FIG. 2 during a fourth step of inserting segmented fastener 200 into alignment hole / passage 101.

[0112] As depicted, when first shank segment 202 is proximate to alignment hole / passage 101, first shank segment 202 may be pivoted relative to head segment 201 about pin 206(a). Head segment 201 may still align along the first axis at the fourth step.

[0113] As depicted, once pivoted to align with alignment hole / passage 101, first shank segment 202 may be inserted into alignment hole / passage 101. Because first shank segment 202 comprises threaded sub-segment 208 this may comprise spinning / rotating the inserted segments around an axis aligned with the passage defined by alignment hole / passage 101.

[0114] FIG. 9 illustrates the example segmented fastener 200 of FIG. 2 during a fifth step of inserting segmented fastener 200 into alignment hole / passage 101.

[0115] As depicted, when head segment 201 is proximate to alignment hole / passage 101, head segment 201 may be pivoted about pin 206(a) to align with alignment hole / passage 101 and come back into alignment with the other segments.

[0116] As depicted, once pivoted to align with alignment hole / passage 101, head segment 201 may be inserted into alignment hole / passage 101 until contact surface 212 is flush with the wall of internal combustion engine 101. Because first shank segment 202 comprises threaded sub-segment 208, this may also comprise spinning / rotating the inserted segments around an axis aligned with the passage defined by alignment hole / passage 101.

[0117] 0nce segmented fastener 200 is fully inserted into alignment hole / passage 101, distal end 213 can provide a physical stop for aligning a rotational shaft of internal combustion engine 101.

[0118] FIG. 10 illustrates an example segmented fastener 300 comprising a flexible body 307 to pull segments of the segmented fastener 300 together and / or resist forces that would cause the segments to pivot relative to each other, in accordance with various embodiments of the presently disclosed technology.

[0119] Like segmented fastener 200 of FIGs. 2-9, segmented fastener 300 comprises five segments: (1) a head segment 301; (2) a first shank segment 302 extending away from the head segment 301 along a first axis (i.e., an axis along the axial direction of segmented fastener 300); (3) a second shank segment 303 extending away from the first shank segment 302 along the first axis; (4) a third shank segment 304 extending away from the second shank segment 303 along the first axis; and (5) a fourth shank segment 305 extending away from the third shank segment 304 along the first axis.

[0120] As depicted, first shank segment 302 comprises a threaded sub-segment 308 analogous to threaded sub-segment 208 of first shank segment 202. Second shank segment 303 comprises a raised sub-segment 310 analogous to raised sub-segment 210 of second shank segment 203. Fourth shank segment 305 comprises a distal end 313 analogous to distal end 213 of fourth shank segment 205.

[0121] Segmented fastener 300 also comprises pins 306(a)-(d) analogous in form and function to pins 206(a)-(d) of segmented fastener 200. The segments of segmented fastener 300 also comprise prongs and recesses in the same / similar manner as segmented fastener 200.

[0122] As depicted in the specific example of FIG. 10, each of the segments of segmented fastener 300 also comprises a passage within the segment in a direction parallel to the first axis. Namely, head segment 301 comprises passage 316(a). Passage 316(a) may span the full length of head segment 301 or only a portion of the length of head segment 301. First shank segment 302 comprises passage 316(b). Passage 316(b) may span the full length of first shank segment 302. Second shank segment 303 comprises passage 316(c). Passage 316(c) may span the full length of second shank segment 303. Third shank segment 304 comprises passage 316(d). Passage 316(d) may span the full length of third shank segment 304. Fourth shank segment 305 comprises passage 316(e). Passage 316(e) may span the full length of fourth shank segment 305, or only a portion of the length of fourth shank segment 305.

[0123] As depicted, segmented fastener 300 may further comprise a flexible body 307. Flexible body 307 may comprise various types of flexible structures and various materials (e.g., a flexible string, a flexible band such as a rubber band, etc.). Here, flexible body 307 may be inserted within / through passages 316(a)-(e). Where passage 316(a) and / or passage 316(e) only span a portion of the length of their respective segments, flexible body 307 may be bonded within passages 316(a) and / or passage 316(e) (e.g., with glue or another bonding material).

[0124] As alluded to above, tension forces along flexible body 307 can pull the segments of the segmented fastener 300 together and / or resist forces that would cause the segments to pivot relative to each other, thereby stabilizing segmented fastener 300 along the first axis. Such stabilization can provide greater ease of use when inserting segmented fastener 300 into a hole / passage.

[0125] FIG. 11 illustrates a portion an example segmented fastener 400 comprising a torsion spring 407 to pull segments of the example segmented fastener 400 together and / or resist forces that would cause the segments to pivot relative to each other, in accordance with various embodiments of the presently disclosed technology.

[0126] As depicted, segmented fastener 400 comprises a first shank segment 403 and a second shank segment 404. First shank segment 403 may comprise a raised sub-segment410. Second shank segment 404 may be hingedly connected to first shank segment 403 via pin 406 such that second shank segment 404 can pivot relative to first shank segment 403 about pin 406.

[0127] As depicted in the specific example of FIG. 11, segmented fastener400 may also comprise a torsion spring 407 mechanically attached to first shank segment 403 and second shank segment 404 such that torsion forces produced by torsion spring 407 pull the first shank segment 403 and the second shank segment 404 together and / or resist forces that would cause second shank segment 404 to pivot relative to first shank segment 403. As depicted, an axis of torsion spring 407 may align with an axis that pin 406 is inserted along (and that second shank segment 404 pivots about).

[0128] It should be understood that segmented fastener 400 may comprise additional segments which are not pictured. Such additional segments may be mechanically attached to torsion springs similar to torsion spring 407 in form and function.

[0129] FIG. 12 illustrates a portion of an example segmented fastener 500 comprising a flat spring 507 to pull segments of the example segmented fastener 500 together and / or resist forces that would cause the segments to pivot relative to each other, in accordance with various embodiments of the presently disclosed technology.

[0130] As depicted, segmented fastener 500 comprises a first shank segment 503 and a second shank segment 504. First shank segment 503 may comprise a raised sub-segment 510. Second shank segment 504 may be hingedly connected to first shank segment 503 via pin 506 such that second shank segment 504 can pivot relative to first shank segment 503 about pin 506.

[0131] As depicted in the specific example of FIG. 12, segmented fastener 500 may also comprise a flat spring 507 mechanically attached to first shank segment 503 and second shank segment 504 such that restoring forces produced by flat spring 507 pull the first shank segment 503 and the second shank segment 504 together and / or resist forces that would cause second shank segment 504 to pivot relative to first shank segment 503.

[0132] It should be understood that segmented fastener 500 may comprise additional segments which are not pictured. Such additional segments may be mechanically attached to flat springs similar to flat spring 507 in form and function.

[0133] FIG. 13 illustrates a portion of an example segmented fastener 600 comprising a tension spring 607 to pull segments of the example segmented fastener 600 together and / or resist forces that would cause the segments to pivot relative to each other, in accordance with various embodiments of the presently disclosed technology.

[0134] As depicted, segmented fastener 600 comprises a first shank segment 603 and a second shank segment 604. First shank segment 603 may comprise a raised sub-segment 610. Second shank segment 604 may be hingedly connected to first shank segment 603 via pin 606 such that second shank segment 604 can pivot relative to first shank segment 603 about pin 606.

[0135] As depicted in the specific example of FIG. 13, segmented fastener 600 may also comprise a tension spring 607 mechanically attached to first shank segment 603 and second shank segment 604 such that restoring forces produced by tension spring 607 pull the first shank segment 603 and the second shank segment 604 together and / or resist forces that would cause second shank segment 604 to pivot relative to first shank segment 603.

[0136] It should be understood that segmented fastener 600 may comprise additional segments which are not pictured. Such additional segments may be mechanically attached to tension springs similar to tension spring 607 in form and function.

[0137] It should be understood that the presently disclosed segmented fasteners may comprise various materials such as, without limitation, plastics, composites, metals, or any combinations thereof. In addition, segments can be manufactured / fabricated using various techniques, such as, without limitation, 3D printing, injection molding, precision forging, compression forging, and machining, among other processes.

[0138] While embodiments have been described as mainly as an engine timing locating pin, applications can extend to bolted connection where the various parts have threads, or to other needed locating pins, bolts, or screws for various assemblies and applications.Mating Fastener Embodiments

[0139] As described above, embodiments of technology disclosed herein are directed toward a pin that is configured to provide a hard stop, such as a Top Dead Center (TDC) pin that is configured to stop a rotating crankshaft at a particular position. The pin can come in different lengths and diameters, and can be made of different materials, such as steel, aluminum, titanium, plastics, composites, and other materials that meet strength and other physical requirements.

[0140] In other applications, embodiments of the technology disclosed herein can be used to affix or mate several separate pieces together where standard, non-flexible pins, bolts, or other fastening mechanisms would not be not able to access the fastener opening in the pieces due to geometric or other constraints. Such applications often use a fastener having a smaller diameter than that of a typical alignment fastener, although such applications may use a fastener having the same diameter or a larger diameter.

[0141] In one embodiment, the fastener comprises two or more segments, with at least one of these segments being threaded. At least one of the two or more segments has an overhang or a shoulder to act as a stop against one of the pieces being affixed or mated together. In addition, one or more hinges may couple the segments together such that the one or more hinges allow the segments to pivot from a configuration in which the segments are non-aligned to a configuration in which the segments are aligned, with hard mating surfaces between the segments.

[0142] The head of the fastener can have a triangular shape, a square shape, a hexagonal shape, or another shape to facilitate mating the head with an installation tool. In other embodiments, the head of the fastener can have smooth features or knurls to facilitate hand tightening. In embodiments where the fastener is an alignment fastener, the distal tip of the fastener can act as a stop.

[0143] Referring to the drawings, and in particular to FIGs. 14-20, there is shown an embodiment of a segmented fastener 700 comprising two segments: (1) a head segment 701; and (2) a threaded segment 702 extending away from the head segment 701 along afirst axis, the first axis extending along the length of the segmented fastener 700. The threaded segment 702 contains a plurality of threads 708 that cover at least part of the threaded segment 702. The head segment 701 and the threaded segment 702 are configured to pivot relative to each other about a hinge defined in part by a pin 706.

[0144] FIG. 15 is an exploded perspective view of the segmented fastener 700. As shown in FIG. 15, the segmented fastener 700 further comprises a magnet 707(b) to help align the threaded segment 702 with the head segment 701 so that both segments mutually extend along the first axis. A magnetic force between the magnet 707(b) and ferrous elements of the threaded segment 702 resists other forces that would otherwise urge the threaded segment 702 to pivot away from the head segment 701.

[0145] FIG. 15 shows the magnet 707(b) as being located within a recess in the head segment 701. On other embodiments, the magnet 707(b) may be located within a recess in the threaded segment 702.

[0146] In another embodiment, instead of using a magnet 707(b), the segmented fastener 700 may comprise a flexible body inserted through a passage in the head segment 701 and a passage in the threaded segment 702 in order to counteract forces that would otherwise urge the threaded segment 702 to pivot away from the head segment 701, similar to the flexible body described above for the alignment fastener. In yet another embodiment, instead of using a magnet 707(b), the segmented fastener 700 may comprise a spring mechanically attached to the head segment 701 and to the threaded segment 702 in order to counteract forces that would otherwise urge the threaded segment 702 to pivot away from the head segment 701, similar to the spring described above for the alignment fastener. The spring may be a torsion spring, a flat spring, a tension spring, or anothertype of spring.

[0147] In one embodiment, the segmented fastener 700 further comprises a second magnet 707(a) coupled to the head segment 701 to facilitate storing the segmented fastener 700 onto a metal surface when not in use. A contact surface 712 on the head segment 701 is configured to act as a hard stop against a surface of an object being affixed or mated to another object.

[0148] Similar to the alignment fastener described above, the pin 706 extends along a second axis that is perpendicular to the first axis. The head segment 701 comprises a prong extending away from the head segment 701 along the first axis. The threaded segment 702 comprises a recess dimensioned to receive the prong when the head segment 701 and the threaded segment 702 are hingedly connected. The pin 706 is inserted through holes in the threaded segment 702 and a hole in the prong of the head segment 701 so that the threaded segment 702 can pivot, relative to the head segment, about the pin 706.

[0149] FIGs. 16A and 16B are side elevational and cross-sectional views of the segmented fastener 700 in which the head segment 701 and the threaded segment 702 are aligned so that both segments mutually extend along the first axis.

[0150] FIG. 17 is a side elevational view of the segmented fastener 700 in which the head segment 701 is pivoted 90 degrees relative to the first axis (the axis of the threaded segment 702). To the extent that the threaded segment 702 does not otherwise comprise a ferromagnetic material, the threaded segment 702 may have a ferromagnetic region 714 comprising a ferromagnetic material that is attracted to the magnet 707(b).

[0151] FIG. 18 is a side elevational view of the segmented fastener 700 positioned to be inserted into a plate or wall 800 (shown in cross-section), with the head segment 701 pivoted 90 degrees from the first axis (the axis of the threaded segment 702). The plate or wall 800 has a threaded hole 801 and a flat surface 811.

[0152] In FIG. 18, the surface 811 of the plate or wall 800 is separated from another surface 715 by a gap 502, which is the only space available for inserting the segmented fastener 700. As shown in FIG. 18, the segmented fastener 700 is longer than the gap 502 if the head segment 701 and the threaded segment 702 are aligned along the first axis. The head segment 701, however, is configured to pivot around the pin 706, so that in the non-aligned configuration shown in FIG. 18, the segmented fastener 700 can fit in the gap 502. In the non-aligned configuration, the segmented fastener 700 can be positioned in the gap 502 so that a distal end surface 713 of the segmented fastener 700 is facing the threaded hole 801.

[0153] FIG. 19 is a side elevational view of the segmented fastener 700 installed into the plate or wall 800 (shown in cross-section). As shown in FIG. 19, the head segment 701 has been pivoted about the pin 706 into alignment with the threaded segment 702.

[0154] FIG. 20A is a side elevational view of the segmented fastener 700 positioned to be inserted through a second plate or wall 1000 (shown in cross-section) and into a first plate or wall 900 (also shown in cross-section), with the head segment 701 pivoted 90 degrees from the first axis (the axis of the threaded segment 702). The first plate or wall 900 has a threaded hole 901. The second plate or wall 1000 has a flat surface 1011 and a through hole 1002. While the through hole 1002 shown in FIG. 20A is unthreaded, the through hole 1002 can, in anotherembodiment, be a threaded hole similarto the threaded hole 901 in the first plate or wall 900.

[0155] In FIG. 20A, the surface 1011 of the second plate or wall 1000 is separated from another surface 715 by a gap 502, which is the only space available for inserting the segmented fastener 700. As shown in FIG. 20A, the segmented fastener 700 is longer than the gap 502 if the head segment 701 and the threaded segment 702 are aligned along the first axis. The head segment 701, however, is configured to pivot around the pin 706, so that in the non-aligned configuration shown in FIG. 20A, the segmented fastener 700 can fit in the gap 502. In the non-aligned configuration, the segmented fastener 700 can be positioned in the gap 502 so that a distal end surface of the segmented fastener 700 is facing the through hole 1002. This figure shows the ability of the segmented fastener 700 to fasten together two or more items with limited space to access a common hole extending through the two or more items.

[0156] FIG. 20B is a side elevational view of the segmented fastener 700 installed into the first plate or wall 900 (shown in cross-section) through the second plate or wall 1000 (also shown in cross-section). As shown in FIG. 20B, the head segment 701 has been pivoted about the pin 706 into alignment with the threaded segment 702 so that the first plate or wall 900 and the second plate or wall 1000 are fastened together.Smaller Diameter Embodiment Using a Flexible Body

[0157] In some embodiments of the technology disclosed herein, the shank segments have a smaller diameter than the threaded sub-segments. In one embodiment, the smaller-diameter design uses flexible body such as a string, a wire, a rubber band, or another means to transmit tension force, with the flexible body being coupled to a weight or another source of tension force at a proximal end in order to straighten the fastener segments. The flexible body may be coupled at a distal end to a distal-most one of the shank segments using an adhesive like an epoxy adhesive, a friction force created by squeezing the distal end between the inner surface of a hole in the distal-most shank segment and a rod forced into the hole, or another coupling means. In a particular embodiment, the flexible body may be a fluorocarbon 0.022-inch diameter fishing line having a 40-pound line weight, low stretch, and high abrasion resistance.

[0158] In one embodiment, the segmented fastener is made from a ferrous material. In another embodiment, the segmented fastener is made from a non-ferrous material like aluminum, titanium, bronze, or plastic, a non-ferrous composite material, a combination of the foregoing, or a combination of the foregoing with a ferrous material.

[0159] In one embodiment, a magnet coupled to the head segment to facilitate storing the segmented fastener onto a metal surface when not in use is offset to one side of the head segment to permit a hole for the flexible body to be centrally located within the head segment.

[0160] In one embodiment, the through-hole in the shank segments and the head segment for the flexible body has a diameter of 0.037 inches.

[0161] Referring to the drawings, and in particular to FIGs. 21-28, there is shown an embodiment of a segmented fastener 1100 comprising five segments: (1) a head segment 1101; (2) a first shank segment 1102 extending away from the head segment 1101 along a first axis, the first axis extending along the length of the segmented fastener 1100; (3) a second shank segment 1103 that has a smaller diameter than the first shank segment 1102 and that extends away from the first shank segment 1102 along the first axis; (4) a thirdshank segment 1104 extending away from the second shank segment 1103 along the first axis; and (5) a fourth shank segment 1105 extending away from the third shank segment 1104 along the first axis.

[0162] A flexible body 1109, such as a wire, a string, a rubber material, an elongated tension spring, or another means of transmitting tension force, provides the force to bring the segments into a straight axis. In certain embodiments, particularly embodiments using a rubber material, an elongated tension spring, or another elongated elastic or resilient material, a distal end of the material is fixed to a distalmost one of the shank segments (the fourth shank segment 1105 in the embodiment of FIGs. 21-28), and a proximal end of the material is fixed to the head segment 1101. The head segment 1101 and the shank segments 1102-1105 are configured to pivot relative to each other about hinges defined in part by pins 1106(a)-(d).

[0163] FIG. 22 is an exploded perspective view of the segmented fastener 1100. As shown in FIG. 22, the flexible body 1109 extends through holes along the axis of the segments. The tip shank segment 1105 may have a through hole or a hole that does not penetrate the tip surface. The flexible body 1109 is configured to counteract forces that would otherwise urge the head segment 1101 and the shank segments 1102-1105 to pivot away from each other, similar to the flexible bodies described above for the alignment fastener and the mating fastener.

[0164] The flexible body 1109 may have a friction coating so that the flexible body 1109 is not loose and provides resistance to slippage. In another embodiment, the holes for the flexible body in one or more of the head segment 1101 and the shank segments 1102-1105 have a friction coating so that the flexible body 1109 is not loose and provides resistance to slippage.

[0165] In another embodiment, instead of using the flexible body 1109, the segmented fastener 1100 may comprise springs mechanically connecting the segments in order to counteract forces that would otherwise urge the segments to pivot away from each other, similar to the springs described above for the alignment fastener and the mating fastener. The springs may be torsion springs, flat springs, tension springs, or another type of spring.

[0166] In one embodiment, the segmented fastener 1100 further comprises a magnet1107 coupled to the head segment 1101 to facilitate storing the segmented fastener 1100 onto a metal surface when not in use.

[0167] S imilar to the alignment fastener and mating fastener described above, the pins 1106(a)-(d) extend in a direction that is perpendicular to the first axis. The head segment 1101 and the shank segments 1102-1104 each comprise a prong extending away from the segment along the first axis. The shank segments 1102-1105 each comprise a recess dimensioned to receive the prong of an adjoining segment when the two segments are hingedly connected. The pins 1106(a)-(d) are inserted through holes in the segments so that segments can pivot relative to each other.

[0168] The first shank segment 1102 contains a plurality of threads 1108 that cover at least part of the first shank segment 1102.

[0169] FIGs. 23A and 23B are side elevational and cross-sectional views of the segmented fastener 1100 in which the head segment 1101 and the shank segments 1102- 1105 are aligned so that all segments mutually extend along the first axis. A contact surface 1112 on the head segment 1101 facing the shank segments 1102-1105 is configured to act as a hard stop against a surface of an object to which the segmented fastener 1100 is being fastened. The shank segments 1102-1105 extend for a length 1114 between the contact surface 1112 and a distal end surface 1113 of the segmented fastener 1100.

[0170] FIG. 24 is a side elevational view of the segmented fastener 1100 positioned to be inserted into a portion of an internal combustion engine 100 (shown in cross-section), with the fourth shank segment 1105 pivoted 90 degrees from the axis of the first through third shank segments 1102-1104 and the head segment 1101. The internal combustion engine 100 has a threaded hole 101 and a flat surface 1111.

[0171] In FIG. 24, the surface 1111 of the internal combustion engine 100 is separated from another surface 1115 by a gap 502, which is the only space available for inserting the segmented fastener 1100. As shown in FIG. 24, the segmented fastener 1100 is longer than the gap 502 if the segments are aligned along the first axis. The segments, however,are configured to pivot around the pins 1106(a)-(d), so that in the first non-aligned configuration shown in FIG. 24, the segmented fastener 1100 can fit in the gap 502. In the first non-aligned configuration, the segmented fastener 1100 can be positioned in the gap 502 so that the distal end surface 1113 of the segmented fastener 1100 is facing the threaded hole 101.

[0172] FIG. 25 is a side elevational view of the segmented fastener 1100 partially installed into the internal combustion engine 100 (shown in cross-section). As shown in FIG. 25, the fourth shank segment 1105 has been fully inserted into the threaded hole 101 of the internal combustion engine 100, the third shank segment 1104 has been pivoted about the pin 1106(d) into alignment with the fourth shank segment 1105, and the third shank segment 1104 has also been partially inserted into the threaded hole 101. The pivoting action can be accomplished by hand or with a gripping tool. The aligned segments can be pulled together by pulling the proximal end of the flexible body 1009 by hand or with a weight, or by otherwise putting tension on the flexible body 1009. In one embodiment, because the path of the flexible body 1009 is offset from the pins, the flexible body will tend to bring the segments into alignment along the first axis.

[0173] FIG. 26 is a side elevational view of the segmented fastener 1100 further installed into the internal combustion engine 100 (shown in cross-section). As shown in FIG. 26, the third shank segment 1104 has been fully inserted into the threaded hole 101 of the internal combustion engine 100, the second shank segment 1103 has been pivoted about the pin 1106(c) into alignment with the third shank segment 1104, and the second shank segment 1103 has also been partially inserted into the threaded hole 101.

[0174] FIG. 27 is a side elevational view of the segmented fastener 1100 further installed into the internal combustion engine 100 (shown in cross-section). As shown in FIG. 27, the second shank segment 1103 has been fully inserted into the threaded hole 101 of the internal combustion engine 100, the first shank segment 1102 has been pivoted about the pin 1106(b) into alignment with the second shank segment 1103, and the first shank segment 1102 has also been partially inserted into the threaded hole 101. Becausethe first shank segment comprises a plurality of threads 1108, the first shank segment needs to be rotated as it is inserted into the threaded hole 101.

[0175] FIG. 28 is a side elevational view of the segmented fastener 1100 fully installed into the internal combustion engine 100 (shown in cross-section). As shown in FIG. 28, the first shank segment 1102 has been fully inserted into the threaded hole 101 of the internal combustion engine 100, and the head segment 1101 has been pivoted about the pin 1106(a) into alignment with the first shank segment 1101. The head segment 1101 is maintained in alignment with the shank segments because the contact surface 1112 on the head segment 1101 is flush against the surface 1111 of the internal combustion engine 100.

[0176] In one embodiment, after the segmented fastener 1100 is fully pushed into the threaded hole 101 and the threads 1108 are tightened until the contact surface 1112 presses against the surface 1111 of the internal combustion engine 100, the flexible body 1109 is then pulled by hand or with a weight so that all of the segments are straightened out and stop on their flat surfaces axially. Tightening the flexible body 1109 thus forces the segmented fastener 1100 to be straight along the axis. The process allows the segments initially to be inserted loose into the threaded hole 101 without tension on the flexible body 1109; once all of the segments are in the hole 101 and threaded, then the tension is applied to the flexible body 1109 to ensure that all segments are axially in a straight line and not drooping.Smaller Diameter Embodiment Using Ring Magnets

[0177] Referring to the drawings, and in particular to FIGs. 29-36, there is shown an embodiment of a segmented fastener 1200 comprising five segments: (1) a head segment 1201; (2) a first shank segment 1202 extending away from the head segment 1201 along a first axis, the first axis extending along the length of the segmented fastener 1200; (3) a second shank segment 1203 that has a smaller diameter than the first shank segment 1202 and that extends away from the first shank segment 1202 along the first axis; (4) a third shank segment 1204 extending away from the second shank segment 1203 along the firstaxis; and (5) a fourth shank segment 1205 extending away from the third shank segment 1204 along the first axis. The head segment 1201 and the shank segments 1202-1205 are configured to pivot relative to each other about hinges defined in part by pins 1206(a)-(d) .

[0178] In certain embodiments, similar to the shank segment 203 shown for example in FIG. 2, one or more of the shank segments 1202-1205 may comprise a raised subsegment of wider diameter than an adjoining shank segment to promote stability when the segmented fastener 1200 is in an aligned configuration.

[0179] FIG. 30 is an exploded perspective view of the segmented fastener 1200. Similar to embodiments described above, the pins 1206(a)-(d) extend in a direction that is perpendicularto the first axis. The head segment 1201 and the shank segments 1202-1204 each comprise a prong extending away from the segment along the first axis. The shank segments 1202-1205 each comprise a recess dimensioned to receive the prong of an adjoining segment when the two segments are hingedly connected. The pins 1206(a)-(d) are inserted through holes in the segments so that the segments can pivot relative to each other.

[0180] As shown in FIG. 30, the segmented fastener 1200 further comprises a magnet 1207(b) to help align the shank segment 1202 with the head segment 1201 so that both segments mutually extend along the first axis. A magnetic force between the magnet 1207(b) and ferrous elements of the shank segment 1202 resists other forces that would otherwise urge the shank segment 1202 to pivot away from the head segment 1201.

[0181] FIG. 30 shows the magnet 1207(b) as being located within a recess in the head segment 1201. On other embodiments, the magnet 1207(b) may be located within a recess in the shank segment 1202.

[0182] As shown in FIG. 30, the segmented fastener 1200 further comprises circular ring magnets 1207(al)-(a3). Each ring magnet 1207(al)-(a3) is a cylindrical shell having a central hole that is sized and shaped to fit securely around one of the prongs extending away from one of the shank segments 1202-1204. The ring magnets 1207(al)-(a3) help to align the shank segments 1202-1205 so that the shank segments 1202-1205 all extend along the first axis. A magnetic force between each ring magnet 1207 and ferrouselements of an adjoining shank segment resists other forces that would otherwise urge the shank segments to pivot away from each other.

[0183] In one embodiment, the segmented fastener 1200 further comprises a magnet 1207(a) coupled to the head segment 1201 to facilitate storing the segmented fastener 1200 onto a metal surface when not in use.

[0184] The first shank segment 1202 contains a plurality of threads 1208 that cover at least part of the first shank segment 1202.

[0185] FIGs. 31A and 31B are side elevational and cross-sectional views of the segmented fastener 1200 in which the head segment 1201 and the shank segments 1202- 1205 are aligned so that all segments mutually extend along the first axis. A contact surface 1212 on the head segment 1201 facing the shank segments 1202-1205 is configured to act as a hard stop against a surface of an object to which the segmented fastener 1200 is being fastened. The shank segments 1202-1205 extend for a length 1214 between the contact surface 1112 and a distal end surface 1213 of the segmented fastener 1200.

[0186] FIG. 32 is a side elevational view of the segmented fastener 1200 positioned to be inserted into a portion of an internal combustion engine 100 (shown in cross-section), with the fourth shank segment 1205 pivoted 90 degrees from the axis of the first through third shank segments 1202-1204 and the head segment 1201. The internal combustion engine 100 has a threaded hole 101 and a flat surface 211.

[0187] In FIG. 32, the surface 211 of the internal combustion engine 100 is separated from another surface 215 by a gap 502, which is the only space available for inserting the segmented fastener 1200. As shown in FIG. 32, the segmented fastener 1200 is longer than the gap 502 if the segments are aligned along the first axis. The segments, however, are configured to pivot around the pins 1206(a)-(d), so that in the first non-aligned configuration shown in FIG. 32, the segmented fastener 1200 can fit in the gap 502. In the first non-aligned configuration, the segmented fastener 1200 can be positioned in the gap 502 so that the distal end surface 1213 of the segmented fastener 1200 is facing the threaded hole 101.

[0188] FIG. 33 is a side elevational view of the segmented fastener 1200 partially installed into the internal combustion engine 100 (shown in cross-section). As shown in FIG. 33, the fourth shank segment 1205 has been fully inserted into the threaded hole 101 of the internal combustion engine 100, the third shank segment 1204 has been pivoted about the pin 1206(d) into alignment with the fourth shank segment 1205, and the third shank segment 1204 has also been partially inserted into the threaded hole 101.

[0189] In one embodiment, the ring magnets 1207 are part of the body segments. Each ring magnet 1207 acts as a stop and as an attraction between the various segments once the segments are axially aligned. The pin centerline is located such that the segments will pivot around the center of the pin and come to a stop when adjoining segments are axially aligned.

[0190] FIG. 34 is a side elevational view of the segmented fastener 1200 further installed into the internal combustion engine 100 (shown in cross-section). As shown in FIG. 34, the third shank segment 1204 has been fully inserted into the threaded hole 101 of the internal combustion engine 100, the second shank segment 1203 has been pivoted about the pin 1206(c) into alignment with the third shank segment 1204, and the second shank segment 1203 has also been partially inserted into the threaded hole 101.

[0191] FIG. 35 is a side elevational view of the segmented fastener 1200 further installed into the internal combustion engine 100 (shown in cross-section). As shown in FIG. 35, the second shank segment 1203 has been fully inserted into the threaded hole 101 of the internal combustion engine 100, the first shank segment 1202 has been pivoted about the pin 1206(b) into alignment with the second shank segment 1203, and the first shank segment 1202 has also been partially inserted into the threaded hole 101. Because the first shank segment comprises a plurality of threads 1208, the first shank segment needs to be rotated as it is inserted into the threaded hole 101.

[0192] FIG. 36 is a side elevational view of the segmented fastener 1200 fully installed into the internal combustion engine 100 (shown in cross-section). As shown in FIG. 36, the first shank segment 1202 has been fully inserted into the threaded hole 101 of the internal combustion engine 100, and the head segment 1201 has been pivoted about the pin1206(a) into alignment with the first shank segment 1201. The head segment 1101 is maintained in alignment with the shank segments by the magnet 1207(a) and because the contact surface 1212 on the head segment 1201 is flush against the surface 211 of the internal combustion engine 100.

[0193] In other embodiments, compression springs in combination with leaf springs can be used instead of one or more of the ring magnets 1207(al-(a3) to align the segments along a common axis.

[0194] As used herein, the term "or" may be construed in either an inclusive or exclusive sense. Moreover, the description of resources, operations, or structures in the singular shall not be read to exclude the plural. Conditional language, such as, among others, "can," "could," "might," or "may," unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments include, while other embodiments do not include, certain features, elements and / or steps.

[0195] Terms and phrases used in this document, and variations thereof, unless otherwise expressly stated, should be construed as open ended as opposed to limiting. As examples of the foregoing, the term "including" should be read as meaning "including, without limitation" or the like. The term "example" is used to provide exemplary instances of the item in discussion, not an exhaustive or limiting list thereof. The terms "a" or "an" should be read as meaning "at least one," "one or more" or the like. The presence of broadening words and phrases such as "one or more," "at least," "but not limited to" or other like phrases in some instances shall not be read to mean that the narrower case is intended or required in instances where such broadening phrases may be absent.

Claims

ClaimsWhat is claimed is:

1. A segmented fastener comprising: a head segment; and a shank segment extending away from the head segment along a first axis; wherein the shank segment is hingedly connected to the head segment such that the shank segment is configured to pivot, relative to the head segment, about a second axis perpendicular to the first axis.

2. The segmented fastener of claim 1, further comprising a second shank segment extending away from the shank segment along the first axis, wherein the second shank segment is hingedly connected to the shank segment such that the second shank segment is configured to pivot, relative to the shank segment, about a third axis perpendicular to the first axis.

3. The segmented fastener of claim 2, wherein at least one of the shank segment and the second shank segment comprise a threaded sub-segment.

4. The segmented fastener of claim 2, further comprising a third shank segment extending away from the second shank segment along the first axis, wherein: the third shank segment is hingedly connected to the second shank segment such that the third shank segment is configured to pivot, relative to the second shank segment, about a fourth axis perpendicular the first axis; and the third shank segment comprises a raised sub-segment of wider diameter than the shank segment and the second shank segment.

5. The segmented fastener of claim 1, wherein: the shank segment comprises a prong extending away from the shank segment along the first axis;the second shank segment comprises a recess dimensioned to receive the prong when the shank segment and the second shank segment are hinged ly connected; and the segmented fastener further comprises a pin inserted through holes of the prong and holes of the recess when the shank segment and second shank segment are hingedly connected such that the second shank segment is configured to pivot, relative to the shank segment, about the pin.

6. The segmented fastener of claim 1, wherein: the head segment comprises a magnet; and magnetic forces between the magnet and ferrous elements of the shank segment resist forces that cause the head segment to pivot relative to the shank segment.

7. The segmented fastener of claim 1, wherein: the head segment comprises a passage through the head segment in a direction parallel to the first axis; the shank segment comprises a second passage through the shank in a direction parallel to the first axis; the segmented fastener further comprises a flexible body inserted through the passage and the second passage when the head segment and the shank segment are hingedly connected; and tension forces along the flexible body resist forces that cause the head segment to pivot relative to the shank segment.

8. The segmented fastener of claim 1, wherein: the segmented fastener further comprises a spring mechanically attached to the head segment and the shank segment; and restoring forces of the spring resist forces that cause the head segment to pivot relative to the shank segment.

9. The segmented fastener of claim 8, wherein the spring comprises at least one of a torsion spring, a flat spring, and a tension spring.

10. The segmented fastener of claim 1, wherein a length of the segmented fastener is dimensioned for insertion into an alignment passage of an internal combustion engine for aligning a rotational shaft of the internal combustion engine.

11. A segmented fastener comprising: a head segment comprising a prong; a shank segment extending away from the head segment along a first axis, the shank segment comprising a recess dimensioned to receive the prong; and a pin inserted through holes of the prong and holes of the recess along a second axis perpendicular to the first axis, wherein the pin hingedly connects the head segment and the shank segment such that the shank segment is configured to pivot, relative to the head segment, about the pin.

12. The segmented fastener of claim 11, wherein the prong extends away from the head segment along the first axis.

13. The segmented fastener of claim 11, wherein: the segmented fastener further comprises a second shank segment extending away from the shank segment along the first axis and a second pin; the shank segment further comprises a second prong at an opposing end of the shank segment as the recess; the second shank segment comprises a second recess dimensioned to receive the second prong; the second pin is inserted through holes of the second prong and holes of the second recess along a third axis perpendicular to the first axis; andthe second pin hingedly connects the shank segment and the second shank segment such that the second shank segment is configured to pivot, relative to the shank segment, about the second pin.

14. The segmented fastener of claim 13, wherein the second prong extends away from the shank segment along the first axis.

15. The segmented fastener of claim 13, wherein at least one of the shank segment and the second shank segment comprises a threaded sub-segment.

16. The segmented fastener of claim 11, wherein: the head segment comprises a magnet; and magnetic forces between the magnet and ferrous elements of the shank segment resist forces that cause the head segment to pivot relative to the shank segment.

17. The segmented fastener of claim 11, wherein: the head segment comprises a passage through the head segment in a direction parallel to the first axis; the shank segment comprises a second passage through the shank segment in a direction parallel to the first axis; the segmented fastener further comprises a flexible body inserted through the passage and the second passage when the head segment and the shank segment are hingedly connected; and tension forces along the flexible body resist forces that cause the shank segment to pivot relative to the head segment.

18. A segmented fastener comprising: a head segment comprising a recess dimensioned to receive a prong of a shank segment;the shank segment extending away from the head segment along a first axis, the shank segment comprising the prong; and a pin inserted through holes of the recess and holes of the prong along a second axis perpendicular to the first axis, wherein the pin hingedly connects the head segment and the shank segment such that the shank segment is configured to pivot, relative to the head segment, about the pin.

19. The segmented fastener of claim 18, wherein: the segmented fastener further comprises a second shank segment extending away from the shank segment along the first axis and a second pin; the shank segment further comprises a second recess at an opposing end of the shank segment as the prong, the second recess dimensioned to receive a second prong of the second shank segment; the second shank segment comprises the second prong; the second pin is inserted through holes of the second recess and holes of the second prong along a third axis perpendicular to the first axis; and the second pin hingedly connects the shank segment and the second shank segment such that the second shank segment is configured to pivot, relative to the shank segment, about the second pin.

20. The segmented fastener of claim 18, wherein: the head segment further comprises a magnet; and magnetic forces between the magnet and ferrous elements of the shank segment resist forces that cause the head segment to pivot relative to the shank segment.

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