US2250290A - Pocket tool - Google Patents

Pocket tool Download PDF

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Publication number
US2250290A
US2250290A US265171A US26517139A US2250290A US 2250290 A US2250290 A US 2250290A US 265171 A US265171 A US 265171A US 26517139 A US26517139 A US 26517139A US 2250290 A US2250290 A US 2250290A
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Prior art keywords
tool
pin
rack
teeth
blade
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US265171A
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Berg Martin
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Berg Martin
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B1/00Hand knives with adjustable blade; Pocket knives
    • B26B1/02Hand knives with adjustable blade; Pocket knives with pivoted blade
    • B26B1/04Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position
    • B26B1/048Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position with a locking member being slidable or movable along the handle

Description

' Jul 22,1941 f M. BERG 2,250,290
. POCKET TOOL Filed March 31. 1939 INVENTOR /1/4fi 77/1 62776 ATTORNEY.
Patented July 22, 1941 osirso smrss PATENT orrics POCKET TOOL Martin Berg, New York, N. Y.
Application March 31, 1939, Serial No. 265,171
8 Claims.
This invention relates to pocket tools and particularly to one in which the tool is pivotally opened and closed in a sheath-handle by a longitudinally sliding rack. Patent 1,647,405 to Giesen illustrates a pocket knife of such general construction. The prior tools of this type contained an undue number of parts, resulting in relatively expensive and complicated construction besides having accompanying imperfections in operation and lack of dependability.
The primary object of my present invention is to provide a pocket tool involving substantially an irreducible number of parts with resulting inexpensiveness, compactness, ease of operation, and dependability. I accomplish these objects by first forming suitable material into a troughlike or folded handle or frame preferably having a closed back with at least one open end and an open side, near each end of which is fixed a pin or rivet which acts to strengthen the handle and hold side portions spaced apart. On one pin is pivoted the tool and behind the other pin is arranged a rack member having teeth engaged with corresponding teeth on the shoulder of the tool, so as to slide back and forth in guided movements against the inside of the back of the handle. The rack may extend integrally beyond that end of the handle opposite the tool pivot, whereby, upon pulling out the rack, the tool is projected in open position, and upon. pushing in the rack the tool is projected into closed position. The rack member is so formed as to give it some resiliency in the handle to prevent rattling of the parts in all positions without interposing undue resistance to sliding the rack, as well as to act to snap a holding part on the rack into a cooperating part on the handle to resiliently lock the tool in the open and closed positions.
My present invention is applicable to all types of pocket tools having a sheath-handle and is useful for a knife, file, comb, razor, household cutlery and the like. The following description of the invention is of a preferred embodiment applied to a pocket knife construction as illustrated in the drawing, in which:
Fig. 1 is a side view of the pocket knife with the blade in closed position; Fig. 2 is a crosssectional view through the pocket knife with the blade in closed position; Fig. 3 is a similar crosssectional view of the blade extended in the open position; and Fig. 4 is a cross-sectional view through the knife taken along the line 4-4 of Fig. 2.
The sheath-handle Ill may be made of suitable material, bent, molded or pressed to finished form in a single piece. It is preferably of a metal plate, as sheet steel or brass, stamped out and bent to the folded'form. However, plastic or other molded material may be used. Sheath H! has fiat side portions connected by an integral slightly rounded back portion I2. Rivets I4 and I5 grip side portions together and act to strengthen the sheath-handle rigidly holding the side portions in suitable spaced relation. The tool blade l6 has a cutting edge I! and a shoulder I8 which is pivoted on pin M so as to turn freely thereon from its closed position of Fig. 2 to its open position of Fig. 3. Along the bottom and outer sides of shoulder l8 are teeth or projections l9 and 20.
A rack member 2| of metal has teeth or projections 22 and 23 and tip 24 engageable with corresponding teeth or projections I9, 20 of the blade. Member 2| slides against backportion I2 of handle in behind pin i5 and is guided therein for a push and pull movement. Member 2| has an integral extension 25 projecting in closed position (Fig. 2) beyond the end of handle ||J opposite to that of blade pivot 4. End 25 has a cutout at 26 suitable for gripping to operate it, as well as for attaching a key ring, chain or the like. Rack member 2| is preferably stamped out of sheet metal sufiiciently thick for forming suitable teeth and projections 22, 23 and having sufiicient resiliency for its operation as hereinafter described.
Member 2| has two grooves or stops 21 and 28 which engage pin !5 when the blade is in the closed and open positions, respectively. Member 2| is slightly cambered or has other suitable means coacting with the inside of the back portion l2 of the handle to give the member a degree of resiliency to prevent it and the blade from rattling in any position, as Well as to snap the grooves 27 and 28 around pin I5 to resiliently lock blade HS in open or closed position. The degree of resiliency is such as to permit an easy sliding movement of the rack and a ready disengagement of the grooves 21 and 28 from pin I5 in opening and shutting the knife.
The sheath-handle I0 is preferably formed of a folded-over sheet in a U-form as already described. The side portions of sheath ID are preferably slightly biased outwardly to insure suitable cooperation with the rivets or pins I6, l5. The resilient rack member 2| is cambered or bowed at the intermediate portion thereof and is sprung between the rack section containing teeth and projection 22, 23 and the opposite end which contains the notches 21, 28 cooperating with pin I5. The back of the intermediate portion of member 2I slides against back portion I2 of the sheath. The unitary rack member 2I insures simplicity of construction with a minimum number of parts and assembly factors for the knife, rendering it foolproof and inexpensive. The cambered or spring arrangement of member 2| insures a firm snap action in swinging the tool or blade I 6 between its open and closed positions as well as maintains the assembly in stable arrangement, as will be evident hereinafter.
Figs. 2 and 4 illustrate the blade I6 in its closed position. Rack member 2| is in its innermost position, wherein its teeth 22 coact with teeth I9 of the blade to maintain it closed. Projection 23 of the rack abuts an edge of blade shoulder I8 to limit its inward movement. The cambered, slightly convexed, or otherwise resiliently bowed rack member 2I continuously biases teeth 22 against blade teeth I9 to stably maintain it in its closed position. It will be noted that rack teeth 22 press against the blade teeth I9 and present a force resolved beyond the pivot pin I4 to keep it in this position preventing any incidental movement or jarring thereof. The opposite end 21, 28 of member 2| presses against pin I5. The resilient action of member 2I prevents slight movements or variations in the position of the blade when closed or open, and locks it in these positions through 21, 28.
Central long tudinal slots SI and 32 are provided in the projecting tooth 33 of member 2I adjacent groove 28 and in pin I respectively. Thus edge II of the blade which projects furthest into the handle II] is accommodated without contacting these components of the structure. The projecting end 25 of member 2I is made sufficiently large to permit ready manual gripping thereof for the push and pull action on the blade.
To effect the opening of the knife blade, projecting end 25 is pulled outwardly, raising groove 21 of member 2I from engagement with pin I5. As member 2I is pulled outwardly, surface portion 34 of member 2| is slid along the back portion of pin I5 until notch 28 reaches over pin I5. Projecting tooth 33 limits the outward excursion of member 2I when it abuts pin I5, as will now be evident. The pulling action on member 2I overcomes the stably resilient formation of closed position. Rack teeth 22 cooperate with blade teeth IQ to swing the blade clockwise to extend it to the open position as shown in Fig. 3. The tip 24 of member 2| forms a tooth cooperating with the last tooth I9 of blade I6 to stably maintain the blade in its open position. The resilient stabilizing action of cambered member 2I remains effective due to the continued bowing thereof between pin I5, back portion I2, and blade tooth I9. The rear surface 35 of shoulder I8 of the blade abuts the back sheath portion I2, limiting the swinging of the blade during its extension. Spring-pressed tip 24 of member 2I now continually biases the blade into the open or clockwise direction by its action on tooth I9 of the blade, as will now be evident.
The pocket tool of my present invention is formed of essentially five elements, mutually coacting to constitute a simple, stable and foolproof structure. The tool or blade is rendered extremely firm and stable in either opened or closed position. The possibility of rattling or loosening of any of the component parts is greatly minimized due to the continuous spring-biasing action by the unitary cambered rack member 2| Member 2I is firmly fixed in position between the pin I5, the blade at teeth I9 as well as the back portion I2 of handle I0. Manual movement of the projecting end 25 thereof effects the longitudinal shifting of member 2I between its inward and outward positions as defined by notches 2'! and 28 with respect to pin I5. This sliding action of rack member 2I effects the swinging of the tool to its positions inside or outside of the sheath-handle.
The cambered member 2I is shown sprung against back portion I2 of sheath-handle I0. Naturally a separate back stop and guide for member 2I for its sliding action may be used. Such a back stop may well constitute a partition piece within the sheath, particularly where more than one tool element is incorporated in the structure. I therefore use the term back portion in the specification and claims as generic to such back stop or portion lying between or otherwise joining with the two sides of the sheathhandle.
Although I have specifically described and illustrated my invention in connection with a single-blade pocket knife, it is to be understood that the invention may be applied to multi-tool units in general where more than one tool section is used. Each tool may have an independent manually actuable member corresponding to member 2| of the illustrated form. The back stop corresponding to portion I2 of handle I 0 may be intermediate between the edges of the sides I I. Likewise, disclosed pins I4 and I5 may be replaced by equivalent mechanical expedients performing the respective functions of pivoting the tool I 6 and coacting with rack section 34 and notches 27, 23. Furthermore, the tool element may be of any desired form such as a file, comb, surgical instrument and the like. I am aware that the modifications falling within the broader spirit and scope of the invention are feasible and accordingly I do not intend to be limited except as set forth in the following claims.
Having thus described my invention what I claim is:
1. In a pocket tool, a one-piece handle having two side portions connected by a back portion to form a trough-like structure open at its front and at least one of its ends, pins connecting said side portions near the two ends of the handle, a tool member pivoted on one of said pins and having projections, and a rack member having projections engageable with the tool projections for turning the tool on its pivot, said rack member being longitudinally slidable along the inside of said back portion and in slidable contact with the second one of said pins for keeping the tool member in stable position, said rack member having longitudinally spaced notches arranged to be snapped about said second pin when moved to operate said tool in open and closed positions.
2. In a pocket tool. a frame comprising a handle having two side portions, a back portion between said side portions, and pin elements mounted on said side portions near the two ends thereof; a tool pivoted within said frame on one of said pin elements and carrying projections; and a rack member having projections engageable with said tool projections and being slidable along the inside of said back portion and in contact with the back of the second one of said pin elements, said member being arranged to cooperate with said back portion to resiliently hold it in sliding contact with the back of said second pin element and also to hold said projections of the rack and tool member in firm engagement with each other, said rack member having two longitudinally spaced notches arranged to be snapped about said second pin element when moved to operate said tool into closed and open positions and maintain said tool stable in the positions and having an integral handle extending outside the frame for manually operating said tool into said positions.
3. In a pocket tool, a frame comprising a handle having two opposed sides, a back portion between said sides, and a pin element near each of the two ends thereof connecting said sides; a tool pivoted within said frame on one of said pin elements and carrying projections; and a rack member having projections engageable with the tool projections and being slidable along the inside of said back portion of the frame behind the second one of said pin elements, said rack having a camber cooperating with said back frame portion to resiliently hold it in sliding engagement with said second pin element and firmly hold its projections in engagement with said tool projections, and having an integral handle extending outside the frame for manually sliding said rack member and operating said tool.
4. In a pocket tool of the character described, a frame comprising two opposed sides resiliently biased apart, a back connecting with said sides, and a pin fixed near each end thereof holding said sides apart a predetermined distance; a tool pivoted on one of said pins and carrying projecting teeth near the pivoted portion thereof; and a member having projecting teeth near one end thereof engageable with the tool teeth and having two longitudinally spaced notches near the other end thereof selectively engageable with the second of said pins, the intermediate portion of said member being arranged to slide against said back frame portion to press the member teeth and notches respectively into firm cooperative relation with the tool teeth and second pin to maintain said tool stable when in open and closed positions.
5. In a pocket tool of the character described, a frame comprising two opposed sides, a back connecting with said sides, and a pin fixed near each end thereof holding said sides apart a predetermined distance; a tool pivoted on one of said pins and carrying projecting teeth near one end thereof; and a member having projecting teeth near one end thereof engageable with the tool teeth and having two longitudinally spaced notches near the other end thereof selectively engageable with the second of said pins, theintermediate portion of said member being resilient and bowed towards said back frame portion and arranged to slide against said back portion to press the memher teeth and notches respectively into firm cooperative relation with the tool teeth and second pin to maintain said tool stable when in open and closed positions, a section fof said member projecting beyond said second pin and outside the corresponding frame end arranged for manual gripping for longitudinally sliding the member to snap either of the notches thereof about said second pin to correspondingly operate the tool in its open and closed positions.
6. In a. pocket tool of the character described; a frame comprising a back portion, pivotal means mounted near one end of said frame, and a projection near the other end thereof; a tool pivoted on said pivotal means and carrying projecting teeth near the pivoted portion thereof; and a member having projecting teeth engageable with the tool teeth and having spaced notches selectively engageable with the frame projection, a portion of said member being arranged to slide against said frame back portion and to press the member teeth and notches respectively into firm cooperative relation with the tool teeth and the frame projection to maintain said tool stable in its open and closed positions. j
7. In a pocket tool; a frame comprising a handle having two opposed sides and a portion arranged between said sides; pivotal means near one end of said frame and a projection near the other end thereof; a tool pivoted on said pivotal means and carrying toothed projections; and a rack member having toothed projections engageable with the tool toothed projections and being slidable between the frame portion and the frame projection, said rack member having a resiliently cambered section cooperating with said frame portion to resiliently press said member against said frame projection and said member projections into firm engagement with said tool projections, said rack member having two longitudinally spaced notches arranged to be selectively snapped about said frame projection when moved to operate said tool into its closed and open positions and maintain the tool stable in said positions.
8. In a pocket tool of the character described; a frame comprising a back portion, pivotal means mounted near one end of said frame, and a projection near the other end thereof; a tool pivoted on said pivotal means and carrying projecting teeth near the pivoted portion thereof; and a member having projecting teeth engageable with the tool teeth, spaced notches selectively engageable with the frame projection, and an integral handle having an opening extending outside the frame opposite the end at which said tool is pivoted.
MARTIN BERG.
US265171A 1939-03-31 1939-03-31 Pocket tool Expired - Lifetime US2250290A (en)

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177560A (en) * 1977-10-22 1979-12-11 Hiroshi Sakurai Safety knife
US4525928A (en) * 1983-09-08 1985-07-02 Foster John E Blade opening scabbard for folding knife
US4741106A (en) * 1984-12-12 1988-05-03 Kai Cutlery Co., Ltd. Pocket Knife
FR2609923A1 (en) * 1987-01-26 1988-07-29 Peylaire Michel Mechanism for blocking the blade of a closing item of cutlery
US4823463A (en) * 1987-07-13 1989-04-25 Denis Lemaire Pocket-knife having a handle provided with a slidable blade
US5349753A (en) * 1993-05-19 1994-09-27 Patrick Gaffney One-handed knife system
EP0783938A3 (en) * 1996-01-11 1998-09-09 Buck Knives, Inc. Hand tool with multiple locking blades controlled by a single locking mechanism and release
US5839194A (en) * 1995-10-19 1998-11-24 Bezold; Urs Folding knife
US6460433B1 (en) 1997-10-16 2002-10-08 C-Tech Ag Multipurpose hand device
US6622328B2 (en) * 2000-10-31 2003-09-23 Leatherman Tool Group, Inc. Folding multipurpose pocket tool with floating springs
US20040034937A1 (en) * 1995-07-29 2004-02-26 Peter Ackeret Multipurpose hand-held implement of the pocket-knife type
US6779425B2 (en) 2000-11-27 2004-08-24 Ctech Ag Multipurpose handheld implement
US20050217032A1 (en) * 2002-03-06 2005-10-06 Beatrice Bruggisser Multi-purpose hand-held device
US20060080841A1 (en) * 2001-01-10 2006-04-20 Buck Knives, Inc. Fixed-blade knife with pivotable side pieces
US20060130337A1 (en) * 2004-12-21 2006-06-22 Robert Voros Hand knife
US20060272157A1 (en) * 2005-06-07 2006-12-07 Zeng Min Z Foldable knife
US20060277762A1 (en) * 2005-06-14 2006-12-14 Leatherman Tool Group Folding knife
US20070180702A1 (en) * 2006-02-06 2007-08-09 Kai U.S.A., Ltd., Dba Kershaw Knives Folding knife with sealed mechanism
US7284329B1 (en) * 2004-12-16 2007-10-23 Randall King Knives, Inc. Folding knife with cantilevered retainer
US20070245497A1 (en) * 2006-04-25 2007-10-25 Leatherman Tool Group, Inc. Hand tool
US20080086895A1 (en) * 2006-10-17 2008-04-17 Thomas Jerald Parks Utility knife with integrated hole punch
US20090090225A1 (en) * 2007-10-05 2009-04-09 Leatherman Tool Group, Inc. Tool And Associated Bit Driver
US20090288301A1 (en) * 2008-05-21 2009-11-26 Kai U.S.A., Ltd., Dba Kershaw Knives Safety lock mechanism for folding knives
USD626810S1 (en) 2009-11-06 2010-11-09 Leatherman Tool Group, Inc. Hand tool
US7913591B2 (en) 2007-01-10 2011-03-29 Leatherman Tool Group, Inc. Multipurpose tool
AU2008200134B2 (en) * 2005-06-14 2011-10-20 Leatherman Tool Group, Inc. Folding Tool
US20110265332A1 (en) * 2010-04-30 2011-11-03 Daniel Cornell Foldable tethered hand tool
US8161653B2 (en) 2007-11-12 2012-04-24 Leatherman Tool Group, Inc. Folding tool having a rotatable locking mechanism
US20130133205A1 (en) * 2011-11-29 2013-05-30 Yen-Fen Lo Assisted opening folding knife with sliding key

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177560A (en) * 1977-10-22 1979-12-11 Hiroshi Sakurai Safety knife
US4525928A (en) * 1983-09-08 1985-07-02 Foster John E Blade opening scabbard for folding knife
US4741106A (en) * 1984-12-12 1988-05-03 Kai Cutlery Co., Ltd. Pocket Knife
FR2609923A1 (en) * 1987-01-26 1988-07-29 Peylaire Michel Mechanism for blocking the blade of a closing item of cutlery
US4823463A (en) * 1987-07-13 1989-04-25 Denis Lemaire Pocket-knife having a handle provided with a slidable blade
US5349753A (en) * 1993-05-19 1994-09-27 Patrick Gaffney One-handed knife system
US6941604B2 (en) 1995-07-29 2005-09-13 Ctech Ag Multipurpose hand-held implement of the pocket-knife type
US20040034937A1 (en) * 1995-07-29 2004-02-26 Peter Ackeret Multipurpose hand-held implement of the pocket-knife type
US5839194A (en) * 1995-10-19 1998-11-24 Bezold; Urs Folding knife
EP0783938A3 (en) * 1996-01-11 1998-09-09 Buck Knives, Inc. Hand tool with multiple locking blades controlled by a single locking mechanism and release
US6460433B1 (en) 1997-10-16 2002-10-08 C-Tech Ag Multipurpose hand device
US6948409B2 (en) 1998-10-16 2005-09-27 Ctech Ag Multipurpose handheld implement
US20050022635A1 (en) * 1998-10-16 2005-02-03 Peter Ackeret Multipurpose handheld implement
US7146668B2 (en) 2000-10-31 2006-12-12 Leatherman Tool Group, Inc. Folding multipurpose pocket tool with floating springs
US20040019973A1 (en) * 2000-10-31 2004-02-05 Rivera Benjamin C. Folding multipurpose pocket tool with floating springs
US6622328B2 (en) * 2000-10-31 2003-09-23 Leatherman Tool Group, Inc. Folding multipurpose pocket tool with floating springs
US20050217033A1 (en) * 2000-10-31 2005-10-06 Leatherman Tool Group, Inc. Folding multipurpose pocket tool with floating springs
US7415745B2 (en) 2000-10-31 2008-08-26 Leatherman Tool Group, Inc. Folding multipurpose pocket tool with floating springs
US6957466B2 (en) 2000-10-31 2005-10-25 Leatherman Tool Group, Inc. Folding multipurpose pocket tool with floating springs
US7213283B2 (en) 2000-10-31 2007-05-08 Leatherman Tool Group, Inc. Folding multipurpose pocket tool with floating springs
US20070209121A1 (en) * 2000-10-31 2007-09-13 Leatherman Tool Group, Inc. Folding multipurpose pocket tool with floating springs
US20060236465A1 (en) * 2000-10-31 2006-10-26 Leatherman Tool Group, Inc. Folding multipurpose pocket tool with floating springs
US6779425B2 (en) 2000-11-27 2004-08-24 Ctech Ag Multipurpose handheld implement
US20060080841A1 (en) * 2001-01-10 2006-04-20 Buck Knives, Inc. Fixed-blade knife with pivotable side pieces
US20050217032A1 (en) * 2002-03-06 2005-10-06 Beatrice Bruggisser Multi-purpose hand-held device
US7284329B1 (en) * 2004-12-16 2007-10-23 Randall King Knives, Inc. Folding knife with cantilevered retainer
US7451545B2 (en) * 2004-12-21 2008-11-18 Heinr, Boker Baumwerk Gmbh Hand knife
US20060130337A1 (en) * 2004-12-21 2006-06-22 Robert Voros Hand knife
US20060272157A1 (en) * 2005-06-07 2006-12-07 Zeng Min Z Foldable knife
AU2008200134B2 (en) * 2005-06-14 2011-10-20 Leatherman Tool Group, Inc. Folding Tool
AU2006202242B2 (en) * 2005-06-14 2007-10-11 Leatherman Tool Group, Inc. Improved folding knife
EP1733854A2 (en) * 2005-06-14 2006-12-20 Leatherman Tool Group, Inc. Improved folding knife
EP1733854A3 (en) * 2005-06-14 2007-01-17 Leatherman Tool Group, Inc. Improved folding knife
US7676931B2 (en) 2005-06-14 2010-03-16 Leatherman Tool Group, Inc. Folding knife
US20060277762A1 (en) * 2005-06-14 2006-12-14 Leatherman Tool Group Folding knife
US8291597B2 (en) * 2006-02-06 2012-10-23 Kai U.S.A. Ltd. Folding knife with sealed mechanism
US20070180702A1 (en) * 2006-02-06 2007-08-09 Kai U.S.A., Ltd., Dba Kershaw Knives Folding knife with sealed mechanism
US7337486B2 (en) 2006-04-25 2008-03-04 Leatherman Tool Group, Inc. Hand tool
US20070245497A1 (en) * 2006-04-25 2007-10-25 Leatherman Tool Group, Inc. Hand tool
US20080086895A1 (en) * 2006-10-17 2008-04-17 Thomas Jerald Parks Utility knife with integrated hole punch
US7913591B2 (en) 2007-01-10 2011-03-29 Leatherman Tool Group, Inc. Multipurpose tool
US7712399B2 (en) 2007-10-05 2010-05-11 Leatherman Tool Group, Inc. Tool and associated bit driver
US20090090225A1 (en) * 2007-10-05 2009-04-09 Leatherman Tool Group, Inc. Tool And Associated Bit Driver
US8161653B2 (en) 2007-11-12 2012-04-24 Leatherman Tool Group, Inc. Folding tool having a rotatable locking mechanism
US7979990B2 (en) 2008-05-21 2011-07-19 Kai U.S.A., Ltd. Safety lock mechanism for folding knives
US20090288301A1 (en) * 2008-05-21 2009-11-26 Kai U.S.A., Ltd., Dba Kershaw Knives Safety lock mechanism for folding knives
USD626810S1 (en) 2009-11-06 2010-11-09 Leatherman Tool Group, Inc. Hand tool
US20110265332A1 (en) * 2010-04-30 2011-11-03 Daniel Cornell Foldable tethered hand tool
US20130133205A1 (en) * 2011-11-29 2013-05-30 Yen-Fen Lo Assisted opening folding knife with sliding key

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