1. Field of the Invention
The present invention relates generally to hand tools and accessories. Particularly, the present invention relates to a drop-prevention apparatus for a hand tool.
2. Description of the Prior Art
Hand tools are widely used in construction, maintenance, and industrial facilities operations. The user of a tool often stores tools in a bag, box, pouch, or tool belt when the tool is not being used. The user then selects the appropriate tool for a given task and returns the tool to its storage location after the task is complete. For tasks performed at elevated heights, dropping a tool can cause injury to individuals or damage to objects below the worker. The dropped tool also is a significant inconvenience for workers who must spend time to retrieve the dropped tool.
Lanyards, tethers, hooks, and similar restraints are used to prevent accidental dropping of tools. These restraints are particularly useful for workers at height and in environments where a tool drop can cause substantial damage or harm to plant equipment, to workers, or to objects below a worker who accidentally drops a tool.
One method of tethering a tool includes clipping one end of a tether to an opening in the handle of a tool (e.g., an adjustable wrench) and to clip the other end of the tether to the worker's belt or to a nearby structure. When workers properly tether a tool in this way, accidental drops can be eliminated or greatly reduced.
One method of addressing the problem of dropped tools has been to mold a sleeve snugly over and taking the shape of the tool's handle or grip. The sleeve has a solid end with an opening in the solid end through which a tether may be attached. For example, one line of tools includes hammers, hinged pliers, and adjustable spanners that have a rubber sleeve molded over the handle of the tool with a solid end portion of the sleeve extending beyond the end of the handle. A ring passes through an opening or grommet in the solid end portion of the rubber sleeve. The user clips one end of a lanyard to the ring and attaches the other end of the lanyard to the user's tool belt, scaffolding, ladder, or other object.
Another approach to preventing dropped tools is disclosed in U.S. Pat. No. 6,216,319 to Elkins for a hardware receptacle. The receptacle is a cylindrically-shaped rubber cap with an open end and a closed end. The receptacle is adapted to fit over the end of tools and pieces of hardware of different sizes and generally has a thin wall so as to be pliable and moldable to the various tools and components. Holes extend through the closed end of the receptacles to provide vents that help alleviate suction that may occur when removing a tool or piece of hardware from the receptacles, thus making it easier to remove the hardware.
A further approach to preventing dropped tools is disclosed in US published application no. 2010/0229347-A1 to Kish. The Kish published application discloses a holder adapted to be attached to a tool to prevent a dropped tool from being lost or forgotten during use. The holder has a hollow member with an open end and a closed end. The closed end has a centrally-located opening through which a swivel connector is attached. The hollow member is made of rubber or plastic and the wall of the hollow member frictionally engages or grips a tool located in the hollow member.
Other tool tethering devices include a D-ring attached to a strip of webbing where the webbing is then taped to a tool such as a wrench by wrapping the tape around the webbing to create an attachment point for a lanyard. The D-ring and webbing may also include a cord attachment that cinches to a tool. Instead of using tape on the D-ring, shrink tubing has also been used to surround the webbing and a portion of the tool to create an attachment point for a lanyard.
There exist various devices for creating a lanyard attachment point on a hand tool. The purpose of these devices is to create a point of attachment on a hand tool to which a tool safety lanyard can be attached. The tool safety lanyard is important for those workers working at a height since at some point each worker will experience inadvertently dropping a tool. The dropped tool is dangerous as it may cause damage to expensive equipment or injury to others below.
The existing devices typically use tape or heat shrink tubing to secure a D-ring webbing to a hand tool to create an attachment point for the safety lanyard. Because tape and/or heat shrink tubing is used to secure the D-ring webbing to the hand tool, the D-ring webbing is positioned on the hand tool in a location where a portion of the hand tool adjacent to the attachment point on the hand tool is wider than the attachment point. This is done so that the D-ring webbing cannot be pulled past the wider portion of the hand tool. This is especially important when a hand tool attached to a tool safety lanyard is inadvertently or accidentally dropped. The forces exerted on the D-ring webbing when the tool safety lanyard arrests the dropping tool are sufficiently strong that the tape and/or shrink tubing could be caused to slide off of the hand tool but for the wider portion of the hand tool preventing this from happening.
These devices suffer from a serious disadvantage when they are used on a metal shaft of punch pins, on alignment pins and/or on drift pins such as those used in steel construction for aligning bolt holes. Because the weight of these alignment pins and/or drift pins are several pounds, dropping one of these tools imparts relatively large forces on the D-ring webbing attached with tape or shrink tubing to the tool when the dropped tool is suddenly stopped from falling by the tool safety lanyard. Where alignment pins and/or drift pins are typically elongated rods with a taper over an end portion of the rod or with a taper over the entire rod from one end to the other, the D-ring webbing has no “shoulder” on the hand tool that would prevent the D-ring webbing secured with tape or heat shrink tubing from potentially being pulled over the end of the alignment pin and/or drift pin and releasing the hand tool to continue its fall.
It is an object of the present invention to provide a tool collet for creating a lanyard attachment point on a hand tool.
It is another object of the present invention to provide a tool collet for creating a lanyard attachment point on a hand tool that has an elongated body with either a tapered longitudinal cross-section or a constant longitudinal cross-section to one end of the hand tool.
The present invention achieves these and other objectives by providing a tool collet for creating a lanyard attachment point on a hand tool that includes a collet body, a lanyard ring connected to the collet body and one or more fastening members. In one embodiment, the collet body has a first body side, a second body side, a peripheral body surface between the first body side and the second body side, a collet through opening with an opening surface, and an annular groove in one of the first body side, the second body side or the peripheral body surface of the collet body. The collet through opening extends through the collet body transversely from the first body side and to the second body side. The collet body is typically divided radially relative to the collet through opening defining a first body component and a second body component that is fixedly attached to the first body component where the through opening is formed by the first body component and the second body component. The lanyard ring has an annular end disposed and captured within the annular groove where the lanyard ring freely slides along the annular groove. The one or more fastening members extend between the first body component and the second body component where the fastening members are adapted to securely fix the first body component to the second body component and the tool collet to the hand tool.
In another embodiment of the present invention, the tool collet includes a gripping member disposed within the collet through opening adjacent the surface of the collet through opening.
In a further embodiment of the present invention, the gripping member is one of (1) the surface of the collet through opening having a gripping finish, (2) an insert having an insert through opening where the insert is disposed within the through opening of the collet body, (3) one or more inserts disposed within one or more corresponding recesses in the opening surface of the through opening, and (4) one or more setscrews that penetrate radially through the tool collet to the through opening to engage the hand tool.
In still another embodiment, the insert is flexibly resilient.
In yet another embodiment, the collet body is annularly shaped.
In one embodiment of the present invention, the annular groove is a single annular groom located within the peripheral body surface of the collet body.
In another embodiment of the present invention, the annular groove includes a first annular groove in the first body side of the collet body and a second annular groove in the second body side of the collet body opposite the first annular groove where the first annular groove and the second annular groove are adjacent the peripheral body surface of the collet body.
In another embodiment of the present invention, the annular groove has a cross-section that is T-shaped and the captured annular end of the lanyard ring within the annular groove has a cross-section that is T-shaped.
In another embodiment of the present invention, the collet through opening has a cross-section selected from the group consisting of a circular cross-section and a polygonal cross-section.
In a further embodiment of the present invention, the gripping finish of the opening surface is a knurled finish.
In still another embodiment of the present invention, the insert with a through opening has an outer insert surface with a cross-section that is circular when the collet through opening is circular or an outer insert surface with a matching polygonal cross-section when the collet through opening is a polygon.
In yet another embodiment, the insert disposed within a recess in the opening surface is an elongated, resilient, gripping member disposed within the recess and extending a predefined distance away from the opening surface and into the through opening.
In another embodiment of the present invention, there is a combination hand tool and a tool collet for creating a lanyard attachment point on the hand tool. The combination includes a hand tool having an elongated body that extends to a first hand tool end where the elongated body has a predefined cross-sectional diameter that is equal to or larger than a cross-sectional diameter of the first hand tool end. The combination also includes a tool collet attached to the elongated body of the hand tool, a lanyard ring, and one or more fastening members. The tool collet has a collet body having a first body side, a second body side, a peripheral body surface between the first body side and the second body side, a collet through opening with an opening surface, and an annular groove in one of the first body side, the second body side or the peripheral body surface of the collet body. The collet body may be divided into a first body component and a second body component fixedly attached to the first body component and where the through opening is formed by the first body component and the second body component. The through opening surrounds and securely attaches to the elongated body of the hand tool. The lanyard ring has an annular end adapted to be disposed and captured within the annular groove where the lanyard ring is adapted to freely slide along the annular groove. The one or more fastening members extend between the first body component and the second body component where the one or more fastening members are adapted to securely fix the first body component to the second body component.
In another embodiment, there is disclosed a tool collet kit for creating a lanyard attachment point on a hand tool that includes a collet body with a through opening, an annular groove in one of a first body side of the collet body, a second body side of the collet body or a peripheral body surface of the collet body, a lanyard ring having an annular end adapted to be disposed and captured within the annular groove where the lanyard ring is adapted to freely slide along the annular groove, and one or more fastening members adapted to securely fix the collet body around an elongated body of a hand tool.
The preferred embodiments of the present invention are illustrated in
Tool body 40 has a first body side 42, a second body side 44, a collet through opening 46, and a peripheral body surface 47. Each of first and second body side 42, 44 has an annular groove 48 that retains lanyard ring 80 in a captured but slidable orientation. In this embodiment, annular groove 48 includes a first annular groove 48awith an annular recess 49a and a second annular groove 48b with an annular recess 49b where second annular groove 48b is opposite first annular groove 48a. Each annular groove 48 of first and second bodysides 42, 44 is concentric with collet through opening 46. Within collet through opening 46, there is disposed an optional gripping member 100 that engages hand tool 500 and prevents the movement of tool collet 10 on hand tool 500.
Optional gripping member 100 may be a gripping structure 102 integrally made in an collet opening surface 50 of collet through opening 46 (i.e. the inside surface of through opening 46). One example of a gripping structure 102 includes but is not limited to a knurled finish on collet opening surface 50. Optional gripping member 100 may also be an insert 104 that is disposed within through opening 46. Insert 104 is typically made of a flexibly resilient material such as, for example, rubber or other similar material that is capable of creating frictional contact between tool collet 10 and hand tool 500. Another embodiment of gripping member 100 includes one or more of an optional setscrew 106 that mates with a collet radial through aperture 52. Collet radial through aperture 52 penetrates radially through tool collet 10 from peripheral body surface 47 to collet through opening 46. Setscrew 106 may include one or more setscrews that penetrate radially through tool collet 10 to the surface of hand tool 500. When setscrew 106 is tightened, it fixes tool collet 10 to hand tool 500. It is contemplated that setscrew 106 may also be used with or without insert 104.
Turning now to
Turning now to
Tool body 40 has a first body side 42, a second body side 44, a collet through opening 46, and a peripheral body surface 47. Each of first and second body side 42, 44 has an annular groove 48 that retains lanyard ring 80 in a captured but slidable orientation. In this embodiment, annular groove 48 includes a first annular groove 48awith an annular recess 49a and a second annular groove 48b with an annular recess 49b where second annular groove 48b is opposite first annular groove 48a. Each annular groove 48 of first and second bodysides 42, 44 is concentric with collet through opening 46. Within collet through opening 46, there is disposed an optional gripping member 100 that engages hand tool 500′ and prevents the movement of tool collet 10′ on hand tool 500′.
Optional gripping member 100 may be a gripping structure 102 integrally made in an collet opening surface 50 of collet through opening 46 (i.e. the inside surface of through opening 46). One example of a gripping structure 102 includes but is not limited to a knurled finish on collet opening surface 50. Optional gripping member 100 may also be an insert 104′ that is disposed within through opening 46. Insert 104′ is typically made of a flexibly resilient material such as, for example, rubber or other similar material that is capable of creating frictional contact between tool collet 10 and hand tool 500′. Like the embodiment illustrated in
The key difference in the embodiment shown in
Turning now to
Tool body 340 has a first body component 342, a second body component 344, a collet through opening 346, and a peripheral body surface 347. Each of first and second body component 342, 344 has an annular groove 348 in peripheral body surface 347 that retains lanyard ring 380 in a captured but slidable orientation. Each annular groove 348 of first and second body component 342, 344 is concentric with collet through opening 46. Each of first and second body component 342, 344 has a set of flanges 342a, 344a, respectively, that extend transversely and outwardly from the peripheral body surface 347 a predefined distance. In one embodiment, each of first and second body component 342, 344 has at least one flange 342a, 344a on one end 343a, 345a while the opposite ends 343b, 345b are hingedly connected. In another embodiment, each of first and second body component 342, 344 has at least one flange 342a, 344a on opposite ends 343b, 345b instead of being hingedly connected. The set of flanges 342a, 344a are adapted to be opposed to each other and have fastening member openings 353 for receiving fastener members 450. Fastening members 450 secure first body component 342 and second body component 344 to each other while simultaneously clamping tool body 340 around hand tool 500. In this embodiment, annular groove 348 includes a first annular groove 348a with an annular recess 349a. Annular groove 348 may completely circumscribe tool collet 300 or may only reside in a portion of the peripheral surface 347. Within collet through opening 346, there is disposed an optional gripping member 400 that engages hand tool 500 and prevents the movement of tool collet 10 on hand tool 500.
Optional gripping member 400 may be a gripping structure 102 integrally made into collet opening surface 350 of collet through opening 346 (i.e. the inside surface of through opening 346). As previously discussed, one example of a gripping structure 102 includes but is not limited to a knurled finish on collet opening surface 350. Optional gripping member 400 may also be insert 104 (previously discussed) that is disposed within through opening 346. Another embodiment of gripping member 400 includes a plurality of flexibly resilient members 405 embedded within gripping member grooves 352 formed in collet opening surface 350. The depth of grooves 352 is less than the cross-sectional thickness of members 405 so that member 405 extends inwardly beyond collet opening surface 350 of collet through opening 346 to contact hand tool 500 at all times after tool collet 300 is attached to hand tool 500.
Annular groove 348 has a cross-section that is T-shaped disposed within peripheral body surface 347. In this embodiment, annular groove 348 forms a full circle or ring around peripheral body surface 347. By forming a full circle, annular groove 348 allows lanyard ring 380 to slide completely around the circumference of collet body 340.
Lanyard ring 380 has a ring body 382 with a ring body shaft 384, a closed ring 386 fixedly attached on one end 384a of ring body shaft 384, and a circular ear 388 fixedly attached on an opposite end 384b of ring body shaft 384. Circular ear 388 has a larger cross-sectional diameter than ring end 384b. Circular ear 384 also has a cross-sectional diameter and a thickness less that the recessed groove 349a, of annular groove 34 and is adapted to allow lanyard ring 380 to be captured within annular groove 348 and to freely slide around the circumference of collet body 340. Lanyard ring 380 provides an attachment point for a tool lanyard.
Although the preferred embodiments of the present invention have been described herein, the above description is merely illustrative. Further modification of the invention herein disclosed will occur to those skilled in the respective arts and all such modifications are deemed to be within the scope of the invention as defined by the appended claims.
Number | Name | Date | Kind |
---|---|---|---|
2633375 | Wilcoxon | Mar 1953 | A |
5286130 | Mueller | Feb 1994 | A |
5405210 | Tsui | Apr 1995 | A |
5634734 | Schron, Jr. | Jun 1997 | A |
5842256 | Anscher | Dec 1998 | A |
5975786 | Chang | Nov 1999 | A |
6017071 | Morghen | Jan 2000 | A |
6032993 | Kwon | Mar 2000 | A |
6068310 | Fuller | May 2000 | A |
6199925 | Alba | Mar 2001 | B1 |
6216319 | Elkins | Apr 2001 | B1 |
6601747 | Chi Kuo | Aug 2003 | B1 |
6669394 | Rieber | Dec 2003 | B1 |
6953212 | Alba | Oct 2005 | B2 |
7036858 | Buck | May 2006 | B2 |
7114872 | Alba | Oct 2006 | B2 |
7354304 | Livingston | Apr 2008 | B2 |
7654027 | Grover | Feb 2010 | B1 |
8201867 | Thomeczek | Jun 2012 | B2 |
D675084 | Moreau | Jan 2013 | S |
8424638 | Guthrie | Apr 2013 | B1 |
8516732 | Burnsed, Jr. | Aug 2013 | B2 |
8562053 | Davidson | Oct 2013 | B2 |
8596701 | Alba | Dec 2013 | B2 |
8622675 | Chen | Jan 2014 | B2 |
8622676 | Chen | Jan 2014 | B2 |
8757693 | Fuller | Jun 2014 | B2 |
8979397 | Henry | Mar 2015 | B2 |
9067766 | Bateman | Jun 2015 | B1 |
9247787 | Dering | Feb 2016 | B2 |
9285658 | Xu | Mar 2016 | B2 |
D766058 | Moreau | Sep 2016 | S |
D766059 | Moreau | Sep 2016 | S |
D773270 | Moreau | Dec 2016 | S |
20080292303 | Kope | Nov 2008 | A1 |
20090208274 | Liang | Aug 2009 | A1 |
20090276979 | Kauffman et al. | Nov 2009 | A1 |
20100229347 | Kish | Sep 2010 | A1 |
20120048901 | Wong | Mar 2012 | A1 |
20120266414 | Moreau et al. | Oct 2012 | A1 |
20150060476 | Moreau | Mar 2015 | A1 |
20150289633 | Moreau et al. | Oct 2015 | A1 |
20150345546 | Moreau | Dec 2015 | A1 |
20160192766 | Moreau | Jul 2016 | A1 |
Number | Date | Country |
---|---|---|
2001-322075 | Nov 2001 | JP |
2008-284633 | Nov 2008 | JP |
Entry |
---|
PCT international search report for PCT/US2016/022257 dated Nov. 18, 2016. |
PCT written opinion of the international searching authority for PCT/US2016/022257 dated Nov. 18, 2016. |
Webpage of Python Safety (www.pythonsafety.com/product-groups/attachment-points/) printed Nov. 7, 2014. |
Number | Date | Country | |
---|---|---|---|
20160128455 A1 | May 2016 | US |