Vacuum and other devices for cutting tools

Abstract

Vacuum and other devices for use with cutting tools. Vacuum systems comprise a vacuum head comprising a housing configured to be secured to and released from a cutting tool. The housing has an inlet opening for collection of cutting tool debris and an outlet opening configured to be connected to a vacuum source for suctioning of the cutting tool debris away from the housing. The vacuum head may comprise a clamp for securing the vacuum head to the cutting tool. The vacuum system may further comprise a fastener for securing the clamp to the cutting tool. Other devices, such as a depth limiter device, a level, robotic controls or components, or other attachments, are secured to a chain saw by clamping against opposite sides of a saw bar. The device may include a key that projects in a slot of the saw bar.

Description

VACUUM AND OTHER DEVICES FOR CUTTING TOOLSCROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to U.S. Provisional Patent Application No. 63 / 562,791, filed March 8, 2024, entitled “Vacuum Systems for Cutting Tool Debris.” The entire contents of this application are incorporated herein by reference.

[0002] This application is related to U.S. Patent Application Publication No. 2022 / 0032489 Al, published February 3, 2022, entitled “Chain Saws, Components for Chain Saws, and Systems for Operating Saws,” U.S. Patent Application Publication No. 2022 / 0273315 Al, published September 1, 2022, entitled “Cutting Guide Systems and Methods,” U.S. Patent Application Publication No. 2022 / 0395999 Al, published December 15, 2022, entitled “Devices for Maintaining Tension in Chain Saws,” U.S. Patent Application Publication No. 2023 / 0278241 Al, published September 7, 2023, entitled “Knives and Other Tools and Devices Incorporating Cutting Chains,” U.S. Patent Application Publication No. 2023 / 0364821 Al, published November 16, 2023, entitled “Controls, Feedback, Cutting Variations, and Accessories for Chain Saws,” U.S. Non-Provisional Patent Application No. 18 / 393,784, filed December 22, 2023, entitled “Systems and Methods for Construction with Detection, Guidance, and / or Feedback,” and U.S. Provisional Patent Application No. 63 / 512,962, filed July 11, 2023, entitled “Devices with Cutting Chains and Link Configurations.” The entire contents of these applications are incorporated herein by reference.TECHNICAL FIELD

[0003] The present disclosure is directed to vacuums and other devices for cutting tools, including vacuum systems for removing debris from the operation of cutting tools, such as saws.BACKGROUND

[0004] Various saws, knives, and other tools and devices are known for performing cutting tasks in various fields, such as construction, landscaping, surgery, and others.

[0005] U.S. Patent No. 9,616,512 to Viola discloses a chain saw which may be used, for example, for cutting bone in surgery or for construction applications, among other possible uses. The disclosure of U.S. Patent No. 9,616,512 is herebyincorporated by reference herein in its entirety. U.S. Non-Provisional Patent Application No. 17 / 443,646, filed July 27, 2021, entitled “Chain Saws, Components for Chain Saws, and Systems for Operating Saws,” published as U.S. Patent Application Publication No. 2022 / 0032489 Al on February 3, 2022, the disclosure of which is incorporated by reference herein in its entirety, discloses chain saws, components for chain saws, methods of making chain saws and components, and methods of using chain saws and components.

[0006] U.S. Non-Provisional Patent Application No. 18 / 102,910, filed January 30, 2023, entitled “Knives and Other Tools and Devices Incorporating Cutting Chains,” published as U.S. Patent Application Publication No. 2023 / 0278241 Al on September 7, 2023, the disclosure of which is incorporated by reference herein in its entirety, discloses knives and other tools and devices incorporating cutting chains.

[0007] A need exists for improvements to the operation of cutting tools.SUMMARY

[0008] The present disclosure is directed to vacuums and other devices for cutting tools, including improvements to vacuum systems for debris from operation of cutting tools, such as saws.

[0009] In some examples, a vacuum system for cutting tool debris comprises a vacuum head comprising a housing, wherein the housing is configured to be secured to a cutting tool and released from the cutting tool. At least when the housing is secured to the cutting tool, the housing has an inlet opening for collection of cutting tool debris into the housing and an outlet opening configured to be connected to a vacuum source for suctioning of the cutting tool debris away from the housing. The housing also may have a back opening for allowing the cutting tool to pass through the vacuum head.

[0010] The vacuum head may comprise a clamp for securing the vacuum head to the cutting tool. The vacuum system may further comprise a fastener for securing the clamp to the cutting tool. The clamp may be integral with the housing. The cutting tool may be a chain saw with a saw bar and a cutting chain, and the clamp may comprise a first clamp jaw for pressing against a first lateral side of the saw bar and a second clamp jaw for pressing against a second lateral side of the saw bar.

[0011] The vacuum head may comprise a key configured to project into a longitudinal slot of the saw bar of a chain saw. The key may be configured such that when the key is in the longitudinal slot of the saw bar, the key inhibits rotation of thevacuum head relative to the saw bar. The key may be configured such that when the key is in the longitudinal slot of the saw bar and the vacuum head is not fully secured to the saw bar, the key allows movement of the vacuum head in the direction of the longitudinal slot the saw bar. The key may be integral with the housing.

[0012] The housing may include a first housing part and a second housing part, wherein the first housing part and the second housing part may be secured together around the cutting tool and released from the cutting tool. The first housing part and the second housing part may have clamp jaws for securing the vacuum head to the cutting tool, e.g., to first and second lateral sides of a saw bar of a chain saw. The housing may further comprise a key configured to project into a longitudinal slot of the saw bar. When the first housing part and the second housing part are secured together around the cutting tool, the housing may have an inlet opening, an outlet opening, and a back opening for allowing the cutting tool to pass through the vacuum head. The vacuum system may further comprise a fastener for securing the first housing part and the second housing part together.

[0013] The vacuum system may further comprise tubing configured to connect the vacuum head to a vacuum source. The outlet opening of the housing may be configured to be connected by the tubing to a vacuum source for suctioning of the cutting tool debris away from the housing.

[0014] In some examples, the vacuum head of a vacuum system may also serve as a depth limiter device that limits the depth that a saw bar can be advanced into a material being cut.

[0015] In some examples, other devices, with or without vacuum functionality, are configured to be secured to a chain saw in a configuration as described herein. The device may be any suitable device that is useful when secured to a chain saw as described herein, including but not limited to a depth limiter device, a level, robotic controls or components, or other attachments. The device comprises a clamp for securing the device to the saw bar of a chain saw, wherein the clamp comprises a first clamp jaw for pressing against a first lateral side of the saw bar and a second clamp jaw for pressing against a second lateral side of the saw bar. The device may further comprise a key configured to project into a longitudinal slot of the saw bar. The key is configured such that when the key is in the longitudinal slot of the saw bar and the device is not fully secured to the saw bar, the key allows movement of the device in the direction of the longitudinal slot the saw bar. When the device is a depthlimiter device, the depth limiter device is adapted to limit a depth that the saw bar can be advanced into a material being cut. When the device is a level, the level allows the user to determine and / or to see a precise measurement of the angular displacement of the chain saw bar. When the device comprises robotic control or components, the device allows robotic and computer control for various functionality.

[0016] Further examples and features of embodiments of the invention will be evident from the drawings and detailed description.BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings illustrate examples disclosed herein and, together with the description, serve to explain the principles of the present disclosure.

[0018] FIG. 1A shows an example embodiment of a chain saw cartridge.

[0019] FIG. IB shows a segment of a chain of cutting links.

[0020] FIG. 1C shows an enlarged view of a portion of the chain saw cartridge of FIG. 1 A, with part of the chain removed.

[0021] FIG. ID shows an enlarged perspective view of a portion of the chain saw cartridge of FIG. 1 A, showing a cross-section through two links and the saw bar.

[0022] FIG. IE shows two coupled cutting links pivoted with respect to each other.

[0023] FIG. 2A shows a perspective view of an example embodiment of a vacuum system for cutting tool debris, attached to a chain saw cartridge.

[0024] FIG. 2B shows a top view of the vacuum system of FIG. 2A, attached to a chain saw cartridge.

[0025] FIG. 2C shows an end portion of the vacuum system of FIG. 2A, in cross-section.

[0026] FIG. 3A shows a perspective view of the vacuum head component of the vacuum system of FIG. 2A, attached to a chain saw cartridge.

[0027] FIG. 3B shows a similar view as FIG. 3A, with a first (upper) housing part removed.

[0028] FIG. 3C shows a top view of the vacuum head component of the vacuum system of FIG. 2A, attached to a chain saw cartridge, with a first (upper) housing part and thumb screw removed.

[0029] FIG. 3D shows a perspective view of the vacuum head component of the vacuum system of FIG. 2A, attached to a chain saw cartridge, with a first (upper) housing part and thumb screw removed.

[0030] FIG. 4A shows a front view of the vacuum head component of the vacuum system of FIG. 2A.

[0031] FIG. 4B shows a cross-sectional view of the vacuum head component of the vacuum system of FIG. 2A, attached to a chain saw cartridge.

[0032] FIG. 4C shows another cross-sectional view of the vacuum head component of the vacuum system of FIG. 2A, attached to a chain saw cartridge.

[0033] FIG. 4D shows another cross-sectional view of the vacuum head component of the vacuum system of FIG. 2A, attached to a chain saw cartridge.

[0034] FIG. 4E shows a perspective view of an alternative vacuum head component of a vacuum system attached to a chain saw cartridge, with a first (upper) housing part and thumb screw removed.

[0035] The accompanying drawings may be better understood by reference to the following detailed description.DETAILED DESCRIPTION

[0036] For the purpose of promoting an understanding of the principles of the disclosure, reference will now be made to the examples illustrated in the drawings, and specific language will be used to describe those and other examples. It will nevertheless be understood that no limitation of the scope of the claims is intended by the examples shown in the drawings or described herein. Any alterations and further modifications to the illustrated or described systems, devices, components, or methods, and any further application of the principles of the present disclosure, are fully contemplated as would normally occur to one skilled in the art to which the disclosure relates. Features, components, and / or steps described with respect to one implementation of the disclosure may be combined with features, components, and / or steps described with respect to other implementations of the disclosure.

[0037] The designations “first” and “second” as used herein are not meant to indicate or imply a particular positioning or other characteristic. Rather, when the designations “first” and “second” are used herein, they are used only to distinguish one component or part from another. The terms “attached,” “connected,” “coupled,” and the like mean attachment, connection, coupling, etc., of one part to another either directly or indirectly through one or more other parts, unless direct or indirect attachment, connection, coupling, etc., is specified. The term “user” refers to one or more persons using the devices, systems, and / or methods described herein, such asone or more tradespersons, surgeons, physicians, operators, or other persons using the devices, systems, and / or methods.

[0038] Disclosed herein are various vacuum systems for cutting tool debris. The cutting tool may be, for example, a chain saw, knife, router, or other cutting device (e.g., tool) with or without a cutting chain. Aspects of the chain saw or other cutting device (e.g., drive cog assembly, drive mechanism, etc.) used with systems or components as disclosed herein may be similar to, but are not limited to, those disclosed in U.S. Patent No. 9,616,512, U.S. Patent Application Publication No. 2022 / 0032489 Al, published February 3, 2022, entitled “Chain Saws, Components for Chain Saws, and Systems for Operating Saws,” U.S. Patent Application Publication No. 2023 / 0278241 Al, published September 7, 2023, entitled “Knives and Other Tools and Devices Incorporating Cutting Chains,” and U.S. Provisional Patent Application No. 63 / 512,962, filed July 11, 2023, entitled “Devices with Cutting Chains and Link Configurations,” the disclosures of which are incorporated herein by reference.

[0039] FIG. 1A shows an example embodiment of a chain saw cartridge 10. The chain saw cartridge 10 may be coupled to a housing with a suitable drive mechanism, together forming a chain saw. The chain saw may be used in various applications, such as construction, landscaping, surgery, etc. The chain saw may be used, for example, for cutting workpieces in construction, such as drywall, plaster, wood, plastic, and other materials. The chain saw cartridge 10 in FIG. 1A comprises a saw bar 20, a plurality of cutting links 40A, 40B (cutting links 40A and 40B referred to herein collectively as cutting links 40) assembled together in a cutting chain around the bar 20, and a drive cog assembly 68. The chain saw cartridge 10 may include other components not shown in FIG. 1A, such as a housing, chain tensioning mechanism, and / or other components.

[0040] FIG. IB shows a segment of a chain of cutting links 40A, 40B for a cutting chain of a chain saw such as the cutting chain of chain saw cartridge 10 in FIG. 1A. Each link 40A, 40B comprises a top or cutting side, a bottom or bar side, a first adjacent link side, a second adjacent link side, a first lateral side, and a second lateral side. In the chain segment of FIG. IB, first cutting links 40A alternate with second cutting links 40B.

[0041] Each link 40A, 40B has a hook 50 and a recess 52. The link 40A, 40B has a rounded feature or projection 54 that defines one side of the recess 52. In thisexample embodiment, the hook 50 extends outward on the second adjacent link side and upward from the bottom side, and the rounded projection extends downward from the top side and inward from the first adjacent link side. The recess 52 extends upward from the bottom side and is shaped to receive a hook 50 of an adjacent link 40.

[0042] As shown in FIGS. 1A and IB, a plurality of links 40A, 40B can be connected together in a chain to move along a predetermined path P around the bar 20. The recess 52 of one link receives the hook 50 of an adjacent link, whereby the hook 50 fits into the recess 52. The hook 50 of one link thereby interlocks with the rounded projection 54 of an adjacent link. When two adjacent links are in an aligned or non-articulated configuration with one another, such as along a straight part A of the bar 20, the distance between the tip of the hook 50 and the end of the recess 52 leaves a clearance, allowing for articulation. When two adjacent links are in an articulated configuration along a convex path with one another, such as along a convexly curved part B of the bar 20, the articulation causes the hook 50 to engage further into the recess 52, and distance between the tip of the hook 50 and the end of the recess 52 is smaller than along the straight part A. In some embodiments, at the full extent of articulation, i.e., the maximum degree of pivot between adjacent links during use, the tip of the hook 50 is at its closest point to, and in some embodiments may touch, the end of the recess 52.

[0043] The configuration of the links 40A, 40B with the hooks 50 and corresponding recesses 52 allows the links 40 to pivot with respect to each other and to remain connected to each other even as they pivot away from each other along a convexly curved path. Thus, the chain saw comprises saw bar and a plurality of links arranged in a chain around the saw bar, wherein a first link comprises a hook that engages a recess of a second link, thereby coupling the first link and the second link together and allowing the first and second link to articulate with respect to each other without decoupling as the chain is driven around the saw bar. The links 40A, 40B remain connected, avoiding longitudinal disarticulation, without the need for separate connecting elements such as rivets, pins, or other connectors. The width of the chain is as thin as the width of the cutting links 40, allowing a thin chain, for a thin kerf.

[0044] The bottom side of each link 40A, 40B has a drive cog engagement recess 64. The drive cog engagement recess 64 is for engagement by a drive cog of the drive cog assembly 68.

[0045] In the example chain segment in FIG. IB, there are two versions of cutting links 40, namely first cutting links 40A and second cutting links 40B. When the links 40 are connected together in a chain as shown in FIG. IB, the first cutting links 40A alternate with the second cutting links 40B. That is, a first cutting link 40A is coupled at its first adjacent link side to a second cutting link 40B and at its second adjacent link side to another second cutting link 40B. Similarly, a second cutting link 40B is coupled at its first adjacent link side to a first cutting link 40A and at its second adjacent link side to another first cutting link 40 A.

[0046] At the top or cutting side, each cutting link 40A, 40B has one or more cutting elements or teeth. In the illustrated embodiment, each first cutting link 40A has a cutting tooth positioned on the first lateral side of the cutting link 40A, while each second cutting link 40B has a cutting tooth positioned on the second lateral side of the cutting link 40B. The cutting elements or teeth may have any suitable shape and size. A single link or single chain may have any number of teeth and may have the same or a mix of different sizes, heights, and shapes of cutting teeth.

[0047] The cutting width of the links 40A, 40B (i.e., the width of the cut made by the chain) may be equal to or greater than the width of the saw bar so that the saw does not bind up. For example, in such embodiments, the width of the cut made by the chain typically is equal to or greater than the width of the bar. In some embodiments, such as the example illustrated in FIGS. 1A-1B, the cutting elements do not extend laterally beyond the planes of the lateral sides of the links 40A, 40B. In other examples, the cutting elements may extend beyond the lateral sides of the links 40A, 40B. Cutting elements do not need to be on every link.

[0048] The saw bar 20 is generally planar, with a main body 22 that contributes the primary strength and stability of the bar and allows the links to transmit a normal load with respect to the downward pressure of cutting, i.e., a load that is directed normal to the chain path P and toward the saw bar 20. The bar has two sides 24, 26 in the longitudinal direction and a distal end 25 that in the embodiment of FIG. 1A is curved or semicircular. The bar has a recess at the proximal end, for accommodating a drive cog of the drive cog assembly 68. The sides 24, 26 may have extensions that facilitate transfer of the continuous link chain from the bar to the drive cog and from the drive cog to the bar. The first longitudinal side 24, the second longitudinal side 26, and the distal end 25 define at least part of a chain path P around the saw bar 20.

[0049] The saw bar 20 can have various other configurations. For example, the distal end 25 can be symmetrical and semicircular as shown in FIG. 1A, or it can have other shapes. In one alternative, the distal end can be asymmetrical, presenting a sloped face with rounded ends that projects more on one side of the saw than the other.

[0050] FIG. 1C shows an enlarged view of a portion of the saw bar 20, with part of a chain of links 40A, 40B assembled on the bar 20. FIG. ID shows an enlarged perspective view of a portion of the chain saw cartridge of FIG. 1 A, showing a crosssection through two links and the saw bar.

[0051] As shown in FIGS. 1C and ID, the bar 20 has a rail 30 extending from the main body 22 of the bar 20. The rail 30 extends, in whole or in part, along the sides 24, 26 and the distal end 25 of the bar 20. In alternative embodiments, the rail 30 may extend only along part(s) of the chain path P around the saw bar 20. The rail 30 acts as a monorail along which the links 40A, 40B of the chain travel. The rail 30 generally extends in a direction away from the main body 22 of the bar 20. Although not included in the illustrated embodiment, the rail 30 in some embodiments may include a projection that extends laterally beyond one or both sides of the rail 30. The projection may act as a link lock or retention element that prevents the links 40A, 40B from coming off of the rail 30 in a direction away from the bar, i.e., in a direction away from the bar generally perpendicular to the direction of travel of the chain. In the example illustrated in FIGS. 1C and ID, the rail 30 does not include such a projection.

[0052] The links 40A, 40B have grooves 55 in them so that the links 40A, 40B fit over and straddle the monorail 30. As shown in FIG. ID, each of the illustrated links 40A, 40B has a groove 55 that extends from the bottom side of the link 40A, 40B upward part of the way to the top side of the link 40A, 40B. The top end of the groove 55 is labeled as top end 56. The groove 55 runs parallel to and is located between the first lateral side and the second lateral side of each link 40A, 40B. The groove 55 extends the longitudinal length of each link 40A, 40B, from the first adjacent link side through the rounded projection 54 through the link body and the second adjacent link side and through the hook 50. In alternative embodiments (not shown), the groove 55 may include a notch that extends laterally beyond one or both sides of the groove 55, with the notch being shaped to accommodate a lateral projection of the rail 30 (in the event the rail 30 includes such a projection).

[0053] As shown in FIG. 1C, the grooves 55 of the links 40A, 40B accommodate the rail 30 of the saw bar 20, to allow the links 40A, 40B to travel around the saw bar 20, while keeping the links 40A, 40B aligned along the path P. In the illustrated example, when the links 40A, 40B are assembled on the rail 30, a clearance space is present between the top of the rail 30 and the top end 56 of the groove 55. Also, in this example, the width of the groove 55 is slightly wider than the width of the rail 30. This allows some small movement or play of the links 40A, 40B in a lateral direction with respect to the bar 20, while the rail 30 and grooves 55 inhibit excessive movement of the links 40 in a lateral direction with respect to the bar 20.

[0054] The configurations of the links 40A, 40B and the saw bar 20 result in the vertical load from the links 40A, 40B, i.e., the load in a direction normal to the chain path P directed into the saw bar, being taken up by the main body 22 of the saw bar 20 as opposed to the rail 30 itself. Vertical forces from the cutting elements of the links 40A, 40B are transmitted from the links 40A, 40B directly to the skids or ledges 33 of the saw bar 20 on either side of the rail 30. The rail 30 itself is not significantly loaded by these vertical forces. This arrangement tends to press the links 40A, 40B into place, while the rail 30 provides resistance to lateral movement or rocking motions of the links 40A, 40B.

[0055] In other words, the ledges 33 are where the normal downward load from the links 40A, 40B is primarily carried. The tangent sections at the bottom of the links 40A, 40B, i.e., the tangent sections at the bottom of the hook 50 and the projection 54, contact the ledges 33 on either side of the rail 30. Because of the groove 55, each link 40 straddles the rail 30, with one side of the link 40 contacting the ledge 33 on one side of the rail 30 and the other side of the link 40 contacting the ledge 33 on the other side of the rail 30. The separation of the right link side to ledge contact and left link side to ledge contact provides inherent stability and planar control of the link with respect to the bar. The ledges 33 bear the downward forces from the links 40A, 40B, resulting in stabilizing the links 40A, 40B and maintaining the links 40A, 40B in the same plane as the plane of the bar. This helps assure that the lateral sides of the links 40A, 40B remain substantially coplanar with the lateral sides 27, 29 of the bar 20 (in those embodiments in which the links 40A, 40B are substantially the same width as the bar 20).

[0056] FIG. IE shows a pair of coupled cutting links 40A, 40B, with the second cutting link 40B pivoted or articulated with respect to the first cutting link 40A. Each of the cutting links 40A, 40B has a fin 70 in the form of an extension from the hook 50 and a pocket 72 in the form of a hook extension pocket in its interior. The pocket 72 serves as a groove or channel within which the hook extension 70 of an adjacent, coupled link may be retained during use of the chain of links 40. As used herein, the terms “fin” and “pocket” are cooperating parts. The pocket is a groove or channel within which the fin can be positioned when two adjacent cutting links are coupled. The fin may be an extension, tab, ridge, narrowed structure, or other element capable of being positioned in the pocket. The pocket has a side wall on each side. When the fin is positioned in the pocket, the pocket allows movement of the fin within the pocket in the plane of the pocket (i.e., the x-y plane shown in FIG. IE, as described below), while side walls of the pocket inhibit movement of the fin in a lateral direction with respect to the pocket. Similarly, the fin allows movement of the adjacent link (i.e., the link having the pocket in which the fin is positioned) in the plane of the pocket, while the fin inhibits movement of the side walls of the pocket of the adjacent link in a lateral direction with respect to the fin. The permitted relative movement between the fin and pocket in the plane of the pocket allows the two adjacent cutting links to be pivoted with respect to each other while keeping the lateral sides of the cutting links coplanar and inhibiting the cutting links from decoupling.

[0057] In the embodiment of FIG. IE, the fin or hook extension 70 may be narrower than the hook 50. The illustrated hook extension 70 is shaped as a partial circular disk or crescent, but numerous other shapes are possible.

[0058] For ease of reference in describing various functionality herein, FIG. IE include x-axis and y-axis labels, and the following positional references are used herein (although it will be understood that the positioning is relative and other nomenclature may be used). The saw bar, such as saw bar 20 in FIG. 1A, is considered to be in the x-y plane, with the sides 24, 26 aligned parallel with the x-axis (the x-axis and y-axis move with the saw bar as the saw bar is moved, such that saw bar remains in the x-y plane and the sides 24, 26 remain aligned parallel with the x- axis). The direction of travel of the cutting links 40, 140 around the saw bar 20 is generally in the x-y plane. Along the straight parts A of the saw bar 20, adjacent links 40 are in an aligned or non-articulated configuration in a longitudinal direction,parallel to the x-axis. In the example illustrated in FIG. IB, the links are in an aligned or non-articulated configuration in a longitudinal direction, parallel to the x-axis. The coupled links are pivotable with respect to each other around a pivot axis extending in the lateral direction, parallel to the z-axis (perpendicular to the page in FIGS. 1A-1E). The pivot axis is labeled as pivot axis 99 in FIG. IE. In the example illustrated in FIG. IE, one link has been pivoted with respect to the other around its pivot axis 99.

[0059] When the cutting links 40A, 40B are assembled together as shown in FIG. IB, the fin or hook extension 70 within the corresponding hook extension pocket 72 helps resist lateral dislocation or separation of the links 40A, 40B from each other. In other words, movement of one link 40A relative to the adjacent coupled link 40B in the lateral direction is resisted. The resistance of such lateral dislocation is facilitated by the overlap of the two coupled links 40A, 40B at the area of the fin or hook extension 70 when viewed laterally (i.e., from the side, as shown in FIG. IB). As can be seen in FIG. IB, when viewed laterally, a significant portion (or in some embodiments all) of the hook extension 70 overlaps with the side walls on each side of the hook extension pocket 72 of the adjacent link (resulting in the hook extensions 70 being hidden in FIG. IB). The side walls of the hook extension pocket 72 resist movement of the hook extension 70 in the lateral direction. Similarly, the hook extension 70 resists movement of the side walls of the hook extension pocket 72 in the lateral direction. Thus, the hook extension 70 together with the side walls of the hook extension pocket 72 resist movement of the coupled links 40A, 40B with respect to each other in the lateral direction.

[0060] As can be seen in FIG. IE, the rotation or pivoting of one link with respect to a coupled link occurs around the pivot axis 99. The engaged hook 50 and recess 52 pivot with respect to each other. The inner surface of the hook 50 slides with respect to the outer surface of the rounded feature or projection 54. Along at least part of the outer surface of the rounded feature or projection 54, the outer surface of the rounded feature or projection 54 is the same as the inner surface of the recess 52. The outer surface of the hook 50 slides with respect to the outer surface of the recess 52.

[0061] In the cutting links 40, the fins 70 are located at, or on, the outer surfaces of the hooks 50, while the pockets 72 are located at, or in, the outer surfaces of the recesses 52. In a variation, the pockets 72 may be located at, or in, the outer surfaces of the hooks 50, while the fins 70 may be located at, or on, the outer surfacesof the recesses 52. A single chain may comprise different types of links, with fins and pockets in different locations. The location of the fins 70 and pockets 72 along the outer surfaces of the hooks 50 and recesses 52 can provide advantages such as structural integrity, robustness, less susceptibility to failure, etc. The fins of the links engaging the pockets of the adjacent links keep the linkage together during assembly (e.g., assembly of the chain on the saw bar) and operation.

[0062] In the illustrated embodiment in FIGS. IB and IE, two cutting links 40A and 40B cannot be assembled together while both links are in the same x-y plane, due to the geometry of the links. In order to couple together the cutting links 40A, 40B, each cutting link 40A has a gate 90A located on its second lateral side, and each cutting link 40B has a gate 90B located on its first lateral side. The gate 90A, 90B is a space in one of the side walls of the hook extension pocket 72. The gate 90A, 90B is sized and shaped to allow the fin or hook extension 70 to be passed laterally through the gate 90A, 90B so that the fin or hook extension 70 can be positioned into, and removed from, the hook extension pocket 72. In order to assemble links 40A, 40B, the two links 40A, 40B are positioned in parallel planes, laterally displaced from one another, and angled (pivoted) with respect to each other so that the fin or hook extension 70 of one link is aligned with and next to the gate 90A or 90B of the other link (the relative angular position as shown in FIG. IE). Then, for assembly, the links 40A, 40B are moved into lateral alignment to move the fin or hook extension 70 laterally through the gate 90A or 90B and into the hook extension pocket 72. The fin 70 passes through the gate 90A or 90B, with the links still in parallel planes, until the links are coplanar, with the fin 70 positioned in the pocket 72. When the relative angle (pivot angle) between the links is decreased, the fin 70 is captive by the pocket 72 of the adjacent link. In order to disassemble links 40A, 40B, two links are angled (pivoted) with respect to each other so that the fin or hook extension 70 is aligned with the gate 90A or 90B (the relative angular position as shown in FIG. IE). Then, for disassembly, the links 40A, 40B are moved out of lateral alignment to move the hook extension 70 laterally through the gate 90A or 90B and out of the hook extension pocket 72.

[0063] The angle at which the links 40A, 40B must be positioned with respect to each other may be out of the range of angles that the links 40A, 40B pivot through during normal use of the chain saw. In one example embodiment, in order to position a fin or hook extension 70 into alignment with a gates 90A, 90B, the two adjacentcutting links 40A, 40B need to be pivoted to an angle of about 44 or 45 degrees with respect to each other, to the position shown in FIG. IE. In the same example, when positioned on the saw bar in the chain saw, the links 40A, 40B may need to pivot with respect to each other only to an angle of about 39 or 40 degrees as the chain moves around the curved distal end 25 of the saw bar or around the drive cog. At such an angle, the tip of the hook 50 is at not as close to the end of the recess 52 as the position shown in FIG. IE. Thus, during normal use of the chain saw, the cutting links 40A, 40B do not pivot enough to move the fins or hook extensions 70 into alignment with the gates 90A, 90B. Thus, the geometry helps avoid decoupling of the links 40 from each other during normal operation of the chain saw.

[0064] Additionally, while the gates may be on both sides of the cutting links (e.g., all the way through the cutting links), in the illustrated embodiment the gates are on only one side of the cutting links. Moreover, in the illustrated embodiment, the gates 90A in the cutting links 40A are on the second lateral side, while the gates 90B in the cutting links 40B are on the first lateral side, thereby alternating in the chain. In other embodiments, the gates 90A, 90B may be on the same sides of the cutting links 40A, 40B.

[0065] In an additional feature (not illustrated), the fins or hook extensions 70 on the cutting links 40A may have a shape and / or size that differs from the fins or hook extensions 70 on the cutting links 40B. The gates may be configured such that the fins or hook extensions 70 on the cutting links 40A only pass through the gates 90B of the cutting links 40B, while the fins or hook extensions 70 on the cutting links 40B only pass through the gates 90A of the cutting links 40A. This can help prevent the chain from being misassembled.

[0066] Components as disclosed herein may be made out of any suitable material, e.g., stainless steel, plastic, steel, other suitable metals, etc. Components as disclosed herein may have any suitable dimensions. As one of many possible examples, links as disclosed herein may have a width of 2 mm.

[0067] Components as disclosed herein may be manufactured in any suitable manner. For example, the links may be manufactured by direct metal laser sintering, CNC machining, plastic injection molding, or by metal injection molding. In some examples, the links may be manufactured using: (i) metal injection molding to mold a link having a first lateral side, a second lateral side, and a plurality of cutting teeth,and (ii) grinding (e.g., double disc grinding) to grind the first lateral side and the second lateral side of the link.

[0068] In some examples, a hard coating may be applied to the saw bar, to the links, to the contact surface of the saw bar, i.e., the surface of the saw bar that contacts the links, and / or to the contact surface of the links, i.e., the surface of the links that contacts the saw bar. The hard coating reduces friction and heat generation. The hard coating may also reduce wear and can avoid the need for lubricants.

[0069] Chain saws, and other tools and devices incorporating cutting chains, and cutting links as disclosed herein can achieve one or more advantages, such as: reduced number of tools needed, lower cost, easier use, easier storage, easier transportation, less failure, more precise cuts, lower work time, and / or better outcomes.

[0070] FIG. 2A shows a perspective view of an example embodiment of a vacuum system 110 for collecting debris from operation of a cutting tool, attached to a chain saw cartridge 10. FIG. 2B shows a top view of the vacuum system 110 of FIG. 2A, attached to the chain saw cartridge 10. FIG. 2C shows an end portion of the vacuum system 110 of FIG. 2A, in cross-section.

[0071] The chain saw cartridge 10 includes a chain of cutting links 40 around a saw bar 20, similar to the chain saw cartridge 10 shown in FIG. 1A. The chain saw cartridge 10 may include other components, such as a cartridge housing 12, chain tensioning mechanism, and / or other components.

[0072] In the illustrated example, the vacuum system 110 comprises a vacuum head 120. The vacuum system 110 optionally may include tubing 160 connected to the vacuum head 120. The vacuum system 110 optionally may also include a coupling 170 for coupling the tubing 160 at its outlet end to a vacuum source (not shown). The vacuum system 110 optionally may also include a coupling (not shown) for coupling the tubing 160 at its inlet end to the vacuum head 120.

[0073] FIG. 3A shows a perspective view of the vacuum head 120 of the vacuum system 110 of FIG. 2A, attached to the chain saw cartridge 10. The vacuum head 120 includes a housing 122 comprising a first housing part 122A and a second housing part 122B. The first housing part 122A and the second housing part 122B are in a clamshell arrangement, whereby when they are closed together, they form the housing 122 around a hollow interior 142. The first housing part 122A and the second housing part 122B may be secured together in the closed position by a bolt or screw,such as thumb screw 150, or by any other suitable fastener or other securement. In an alternative embodiment, the first housing part 122A and the second housing part 122B may be parts of a single piece. For example, the first housing part 122A and the second housing part 122B may be connected at a hinge, such as a living hinge, at the back of the housing 122, the side of the housing 122, or at any other suitable location.

[0074] FIG. 3B shows a similar view as FIG. 3A, but with the first housing part 122A removed. In this example, and for ease of reference to the drawings, the first housing part 122A may be referred to herein as the upper housing part, and the second housing part 122B may be referred to herein as the lower housing part.

[0075] FIG. 3C shows a top view of the vacuum head 120 of the vacuum system 110 of FIG. 2A, attached to the chain saw cartridge 10, with the first (in this case, upper) housing part 122A and thumb screw 150 removed. FIG. 3D shows a perspective view of the vacuum head 120 of the vacuum system 110 of FIG. 2A, attached to the chain saw cartridge 10, again with the first housing part 122A and thumb screw 150 removed.

[0076] FIG. 4A shows a front view of the vacuum head 120 of the vacuum system 110 of FIG. 2A. In the illustrated example, when the housing parts 122A, 122B are closed together, the housing parts 122A, 122B form the housing 122 around a hollow interior 142. The housing 122 may be any suitable shape. In the illustrated example, the housing parts 122A, 122B include covers 123A, 123B, respectively, and clamp jaws 130A, 130B, respectively. The covers 123A, 123B may be continuously curved or may have more defined separate walls, such as a top (or bottom) wall, back wall, and side walls. In the illustrated example, the covers 123 A, 123B are rounded with mating edge surfaces 126A, 126B at the back 124 and sides 125. When closed together, the housing parts 122A, 122B leave an inlet opening 127 at the front or inlet side of the housing 122, to face the distal end of the saw bar 20. In addition, when closed together, the housing parts 122A, 122B leave an opening 128 at the back 124 of the housing 122, to allow the saw bar 20 and chain of links 40 to pass completely through the housing 122, while allowing the saw to operate. In addition, when closed together, the housing parts 122A, 122B leave an outlet opening 146 for debris to be suctioned from the interior 142 of the housing 122 to the tubing 160. This outlet opening 146 may be at the side of the housing 122, or in any other suitable position, such as the top, bottom, or back of the housing 122. In one example, the outlet opening 146 is at the side of the housing adjacent the side of the chain of the chainsaw that performs the cutting (or the majority of the cutting) and thus generates debris for removal.

[0077] At the inlet opening 127, the housing 122 may be shaped to facilitate the capture of debris. In the illustrated example, the covers 123 A, 123B have flared portions 129A, 129B that flare outwardly to form a flared inlet 129. At the back 124 of the housing 122, the opening 128 may be kept to a small size, large enough to allow operation of the chain saw while still having a sufficient barrier at the back 124 of the housing 122 to help block or inhibit the exit of debris through a location other than the housing outlet 144. The mating edge surfaces edge surfaces 126A, 126B close together and close with (e.g., touch or abut) each other at the back 124 and sides 125 of the housing 122 to form a barrier for debris at these areas. In some examples, the mating edge surfaces 126 A, 126B may have an optional elastomeric or plastic seal or other element between them to facilitate sealing when they are closed together.

[0078] FIGS. 4B, 4C, and 4D shows cross-sectionals view of the vacuum head 120 of the vacuum system 110 of FIG. 2A, attached to the chain saw cartridge 10. The cross-section of FIG. 4B is taken perpendicular to the saw bar 20 and through the center of the thumb screw 150. The cross-section of FIG. 4C is taken perpendicular to the saw bar 20 but offset from the thumb screw 150. The cross-section of FIG. 4D is taken parallel to the longitudinal axis of the saw bar 20 and through the center of the thumb screw 150.

[0079] As shown in the drawings, each of the housing parts 122A, 122B has a clamp jaw 130A, 130B, respectively. The clamp jaws 130A, 130B together form a clamp 130. When the housing parts 122A, 122B are secured together, the clamp jaws 130A, 130B secure the vacuum head 120 to the saw bar 20. In the illustrated example, the saw bar 20 has a first lateral surface 27 and a second lateral surface 29. In this example, and for ease of reference to the drawings, the first lateral surface 27 may be referred to herein as the upper surface of the saw bar 20, and the second lateral surface 29 may be referred to herein as the lower surface of the saw bar 20. When the vacuum head 120 is positioned on the saw bar, the fastener 150 extends through a longitudinal slot 28 in the saw bar 20. In the illustrated embodiment, the fastener 150 secures the first housing part 122A and the second housing part 122B together. The fastener 150 also connects the clamp jaws 130A, 130B together and is used for securing the clamp 130 to the saw (or other cutting tool). When the fastener 150 is turned in a securing direction, it brings the first and second housing parts 122A, 122Btogether, as well as the clamp jaws 130A, 130B together, securing the vacuum head 120 to the bar 20. The clamping surfaces 132A, 132B of the first and second clamp jaws 130A, 130B press against the first and second lateral surfaces 27, 29, respectively, of the saw bar 20. The clamping surfaces 132A, 132B of the clamp jaws 130A, 130B press and hold the saw bar 20 between them, thereby securing the vacuum head 120 to the saw bar 20. To release the vacuum head 120 from the saw bar 20, the fastener 150 is turned in the opposite, releasing direction.

[0080] In the illustrated embodiment, the housing 122 has a key 134. The key 134 may be formed of key components 134A, 134B of the first and second housing parts 122A, 122B, respectively. In alternative embodiments, the key 134 may be on only one of the housing parts. The key 134, and in some examples the key components 134A, 134B, is / are designed to project into the longitudinal slot 28 in the saw bar 20. The slot 28 may have straight sides extending in the longitudinal direction, and the key 134 (and in some examples the key components 134A, 134B) may have guiding sides 135 A, 135B (which may be straight) that guide the key 134 along the slot 28 in the longitudinal direction of the saw bar 20. In some embodiments, the key 134 helps prevent the vacuum head 120 from rotating. The key 134 also may help in adjusting the longitudinal position of the vacuum head 120 along the saw bar 20, by keeping the vacuum head 120 aligned centrally when sliding the vacuum head 120 along the saw bar 20 (when the fastener 150 is loosened).

[0081] The housing 122 may include a housing outlet 144 including outlet parts 144A, 144B that mate when the housing 122 is closed. The outlet 144 may provide a passage to the outlet opening 146 and may provide an area for connection of the vacuum head 120 to the tubing 160.

[0082] The second housing part 122B may have an internally threaded hole 154 (or a nut) for mating with the external threads of the fastener 150. The first housing part 122A may have a hole 152 through it that allows the externally-threaded stem of the fastener 150 to pass through the first housing part 122A. By turning the head of the fastener 150 above the first housing part 122A, the user can secure the housing parts 122A, 122B together, or, by turning in the opposite direction, loosen / release them.

[0083] The following describes an example operation of the vacuum system 110. A user attaches the outlet end of the tubing 160 to a vacuum source (not shown), which optionally may be by a coupling 170. The inlet end of the tubing 160 may bepre-attached to the vacuum head 120 or attached to the vacuum head 120 by the user either before or after securing the vacuum head 120 to the saw bar 20 (depending on the embodiment), optionally by a coupling. The attachment directs flow from the outlet opening 146 of the vacuum head 120 to the tubing 160.

[0084] The user places the first and second housing parts 122A, 122B on opposite lateral sides of the saw bar 20. The housing parts 122A, 122B may be separate pieces or connected, such as at a hinge, which hinge may be at any suitable location. The user positions the appropriate housing part(s) such that the fastener 150 passes through the slot 28 of the saw bar and so that the key 134 is in the slot 28 of the saw bar. The first and second housing parts 122A, 122B are moved into an opposing (closing) position, but with the fastener 150 not yet turned enough to secure the vacuum head 120 to the saw bar 20. The user may adjust the longitudinal position of the vacuum head 120 along the saw bar 20, with the fastener 150 and the key 134 sliding within the slot 28. Once in the desired position, the user may turn the fastener 150 in the securing direction until the clamp jaws 130A, 130B press sufficiently against the saw bar 20 to secure the vacuum head 120 to the saw bar.

[0085] By allowing the positioning of the vacuum head 120 to be adjusted along the length of the saw bar 20, the vacuum performance may be optimized based on the material and thickness of material being cut. In addition, the vacuum head 120 can also be used as a depth limiter, with or without vacuum suction being applied. That is, with the position of the vacuum head 120 adjusted along the saw bar 20 and locked in position, the vacuum head 120 limits how far the blade can be advanced into the material to be cut.

[0086] The user may turn on the vacuum source, creating suction through the tubing 160 and hollow interior 142 of the vacuum head 120. As the user operates the saw to perform a cutting operation, debris from the cutting is suctioned into the vacuum head 120 through the inlet opening 127. The debris is suctioned through the interior 142 of the vacuum head 120 and out of the outlet opening 146, through the tubing 160, and to the waste receptacle or outlet by the vacuum source.

[0087] To release the vacuum head 120 from the saw bar 20, the user turns the fastener 150 in the releasing direction. The user may reposition the vacuum head 120 for further cutting and suctioning of debris, if desired.

[0088] Many variations of the embodiments described above are possible. For example, the vacuum head may have a housing that is a single piece or in two or morepieces. The vacuum head may include a clamp that may be used to secure the housing to the saw bar. The clamp may be integral with the housing (like the illustrated clamp 130), or the clamp may be a separate piece from the housing.

[0089] For example, the housing may be a single piece that is cup- shaped, with the bottom of the cup having an opening (similar to opening 128) to allow the cutting tool to pass through. A fastener may pass through a top side of the cup and may pass through or be supported by the bottom side of the cup (or vice versa).Clamp jaws may be positioned along the fastener for pressing against opposite sides of a saw bar inside the housing. In one example, the fastener may be oppositely threaded on opposite sides of the saw bar, so that turning the fastener in one direction brings the clamps jaws closer together and turning the fastener in the opposite direction moves the clamp jaws apart. In other words, turning the fastener moves the clamp jaws on the top and bottom of the saw bar, either to secure the clamp (and housing) to the saw bar, or, by turning in an opposite direction, to release the clamp (and housing) from the saw bar.

[0090] In another variation, shown in FIG. 4E, the outlet 144 may be shaped to provide an expansion 180, to facilitate debris removal. The expansion may serve as a reservoir or enlarged outlet channel. As illustrated, the expansion 180 may be elongated to provide suction along a longer length of the chain. In alternative embodiments, the expansion 180 may have other lengths and may be in other positions, such as nearer the proximal end of the vacuum head, so as to provide an enlarged area for debris that is directed toward the back of the housing.

[0091] In some examples, other devices, with or without vacuum functionality, are configured to be secured to a chain saw in a similar manner as a vacuum head as described herein. The device may be any suitable device that is useful when secured to a chain saw as described herein, including but not limited to a depth limiter device, a level, robotic controls or components, or other attachments. When the device is configured without vacuum functionality, the features specific to the vacuum function, such as inlet and outlet ports, may be omitted. The device is configured to be secured to a chain saw bar having a slot, using a clamp and key as described herein.

[0092] In an example, a depth limiter device (shaped like part 120) comprises a clamp 130 for securing the device to the saw bar 20 of a chain saw, wherein the clamp 130 comprises a first clamp jaw 130A for pressing against a first lateral side ofthe saw bar 20 and a second clamp jaw 130B for pressing against a second lateral side of the saw bar 20. The device may further comprise a key 134 configured to project into a longitudinal slot 28 of the saw bar 20. The key 134 is configured such that when the key 134 is in the longitudinal slot 28 of the saw bar 20 and the depth limiter device is not fully secured to the saw bar 20, the key 134 allows movement of the depth limiter device in the direction of the longitudinal slot 28 the saw bar 20. Other features associated with vacuum head 120, such as fastener 150, may be used in the depth limiter device. With the key 134 in the slot 28, the device may be loosened, e.g., using a fastener 150, and the position of the device along the length of the saw bar 20 may be adjusted. Once the device is in the desired position along the saw bar 20, the device may be locked in place along the saw bar 20, e.g., using the fastener 150. The depth limiter device is adapted to limit a depth that the saw bar can be advanced into a material being cut, and this depth is adjustable by adjusting the position of the depth limiting device along the saw bar.

[0093] In other examples, another device, such as a level, robotic controls or components, or another attachment, comprises a clamp 130 for securing the device to the saw bar 20 of a chain saw, wherein the clamp 130 comprises a first clamp jaw 130A for pressing against a first lateral side of the saw bar 20 and a second clamp jaw 130B for pressing against a second lateral side of the saw bar 20. The device may further comprise a key 134 configured to project into a longitudinal slot 28 of the saw bar 20. The key 134 is configured such that when the key 134 is in the longitudinal slot 28 of the saw bar 20 and the device is not fully secured to the saw bar 20, the key 134 allows movement of the device in the direction of the longitudinal slot 28 the saw bar 20. Other features associated with vacuum head 120, such as fastener 150, may be used in the device. With the key 134 in the slot 28, the device may be loosened, e.g., using a fastener 150, and the position of the device along the length of the saw bar 20 may be adjusted. Once the device is in the desired position along the saw bar 20, the device may be locked in place along the saw bar 20, e.g., using the fastener 150. When the device is a level, the level allows the user to determine and / or to see a precise measurement of the angular displacement of the chain saw bar. When the device comprises robotic control or components, the device allows robotic and computer control for various functionality.

[0094] Components of vacuum systems and other devices as disclosed herein may be made out of any suitable material, e.g., plastic, stainless steel, other suitablematerials. The components may be rigid or flexible, depending upon the embodiment. In one example, the vacuum head housing is made of plastic. The plastic may have some flexibility, for example to allow parts to be snapped together and pulled apart, and / or to allow hinged elements to be closed together (e.g., in a clamshell arrangement with a living hinge).

[0095] The tubing 160 may be manufactured integral with the vacuum head and / or vacuum source or may be attachable at either end. The tubing 160 may be, for example, plastic or elastomeric. In one example, the tubing 160 is flexible (e.g., elastomeric), and the outlet end of the tubing 160 is enlarged to allow it to fit around a range of vacuum source inlets. A clamp may be used to secure the tubing 160 to the vacuum source. In another example, the tubing 160 is flexible (e.g., elastomeric), and the outlet end of the tubing 160 is narrowed so that it needs to be stretched to fit around the vacuum source inlet, whereby it can be secured by its own resilient force. An optional clamp may be used to secure the tubing 160 to the vacuum source. In other embodiments, different size couplings 170 may be used for connections to different size vacuum sources. As illustrated in the example of FIG. 2C, the coupling(s) 170 may seal to the outside diameter of the tubing 160, allowing the tubing 160 to then pass through the coupling 170 and into the vacuum. This can help prevent clogging of the tubing 160 by not restricting the tubing 160 at any point along its length. Similar configurations as described above for securing the tubing 160 to the vacuum source may be used for securing the tubing 160 to the vacuum head 120.

[0096] Persons of ordinary skill in the art will appreciate that the embodiments encompassed by the disclosure are not limited to the example embodiments illustrated in the drawings or described above. While illustrative embodiments have been shown and described, a wide range of modifications, changes, and substitutions is contemplated in the foregoing disclosure. It is understood that such variations may be made to the foregoing without departing from the scope of the disclosure.

Claims

CLAIMSWhat is claimed is:

1. A vacuum system for cutting tool debris comprising: a vacuum head comprising a housing, wherein the housing is configured to be secured to a cutting tool and released from the cutting tool; wherein at least when the housing is secured to the cutting tool, the housing has an inlet opening for collection of cutting tool debris into the housing and an outlet opening configured to be connected to a vacuum source for suctioning of the cutting tool debris away from the housing.

2. The vacuum system of claim 1, wherein the vacuum head comprises a clamp for securing the vacuum head to the cutting tool.

3. The vacuum system of claim 2, further comprising a fastener for securing the clamp to the cutting tool.

4. The vacuum system of claim 2, wherein the clamp is integral with the housing.

5. The vacuum system of claim 2, wherein the cutting tool is a chain saw with a saw bar and a cutting chain, and wherein the clamp comprises a first clamp jaw for pressing against a first lateral side of the saw bar and a second clamp jaw for pressing against a second lateral side of the saw bar.

6. The vacuum system of claim 1, wherein the cutting tool is a chain saw with a saw bar and a cutting chain, and wherein the vacuum head comprises a key configured to project into a longitudinal slot of the saw bar.

7. The vacuum system of claim 6, wherein the key is configured such that when the key is in the longitudinal slot of the saw bar, the key inhibits rotation of the vacuum head relative to the saw bar.

8. The vacuum system of claim 7, wherein the key is configured such that when the key is in the longitudinal slot of the saw bar and the vacuum head is notfully secured to the saw bar, the key allows movement of the vacuum head in the direction of the longitudinal slot the saw bar.

9. The vacuum system of claim 6, wherein the key is integral with the housing.

10. The vacuum system of claim 1, wherein at least when the housing is secured to the cutting tool, the housing has a back opening for allowing the cutting tool to pass through the vacuum head.

11. The vacuum system of claim 1, wherein the housing includes a first housing part and a second housing part, wherein the first housing part and the second housing part may be secured together around the cutting tool and released from the cutting tool.

12. The vacuum system of claim 11, wherein the cutting tool is a chain saw with a saw bar and a cutting chain, and wherein the first housing part and the second housing part have clamp jaws for securing the vacuum head to first and second lateral sides of the saw bar.

13. The vacuum system of claim 11, wherein the housing further comprises a key configured to project into a longitudinal slot of the saw bar.

14. The vacuum system of claim 11, wherein when the first housing part and the second housing part are secured together around the cutting tool, the housing has the inlet opening, the outlet opening, and a back opening for allowing the cutting tool to pass through the vacuum head.

15. The vacuum system of claim 11, further comprising a fastener for securing the first housing part and the second housing part together.

16. A vacuum system for cutting tool debris comprising: a vacuum head comprising a housing, wherein the housing is configured to be secured to a cutting tool and released from the cutting tool; and tubing configured to connect the vacuum head to a vacuum source;wherein at least when the housing is secured to the cutting tool, the housing has an inlet opening for collection of cutting tool debris into the housing and an outlet opening configured to be connected by the tubing to a vacuum source for suctioning of the cutting tool debris away from the housing.

17. A device configured to be secured to a chain saw, wherein the chain saw comprises a saw bar and a cutting chain, wherein the device comprises: a clamp for securing the device to the chain saw; wherein the clamp comprises a first clamp jaw for pressing against a first lateral side of the saw bar and a second clamp jaw for pressing against a second lateral side of the saw bar.

18. The device of claim 17, wherein the device comprises a key configured to project into a longitudinal slot of the saw bar.

19. The device of claim 18, wherein the key is configured such that when the key is in the longitudinal slot of the saw bar and the device is not fully secured to the saw bar, the key allows movement of the device in the direction of the longitudinal slot the saw bar.

20. The device of claim 17, wherein the device is part of a vacuum system.

21. The device of claim 17, wherein the device is a depth limiter adapted to limit a depth that the saw bar can be advanced into a material being cut.

22. The device of claim 17, wherein the device comprises a level.

23. The device of claim 17, wherein the device comprises robotic controls or components.

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