Locked Blade Patents (Class 30/160)
  • Patent number: 10688672
    Abstract: A folding knife assembly includes a blade system which is disposable between an open configuration and a closed configuration using a single hand. The blade system includes a fixed blade member and a movable blade member, wherein the fixed blade member and moveable blade member are cooperatively structured to operatively engage one another when the blade system is disposed in an open configuration. The folding knife assembly also includes a positioning system structured to facilitate disposition of the blade system between an open configuration and a closed configuration. A locking system is provided and is structured to operatively engage at least a portion of the positioning system to releasably secure the blade system in the open configuration, and to operatively disengage the positioning system to permit disposition of the blade system into a closed configuration.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: June 23, 2020
    Inventor: Michael Gregory Perez
  • Patent number: 10493613
    Abstract: Provided is a tool that includes a handle assembly including a top portion and a bottom portion. The tool also includes a lock plate disposed between the top and bottom portions and having a deflectable arm having a free end biased towards the top portion, a fixed end opposite the free end, an inner edge, an outer edge, and a detent near the free end and the inner edge. The tool additionally includes a blade having first and second ends, an indent in a bottom surface of the blade near the first end for engaging the detent in a closed position, and a ramp on the bottom surface near the indent defining a reduced thickness portion of the blade that reduces in thickness from the indent towards an edge of the blade to reduce contact between the detent and the blade during rotation of the blade.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: December 3, 2019
    Assignee: SWIMC LLC
    Inventors: Victor J. Levand, Sharad Gaurav, Sarah Bridget Mulroy, Joshua R. Robertson, Edward Ray Goodwin, Randi Boss, Michael C. Lambertson
  • Patent number: 10357887
    Abstract: A handle having illuminating features, such as on a utility tool, the handle having a housing made up of a first housing section and a second housing section that mate with each other to define a cavity, the first housing section having a plurality of slots through which an internally positioned set of LEDs can emit. The second housing section may similarly have a plurality of protrusions and a second set of LEDs to transmit light. Translucent diffusers may be positioned between the LEDs and their respective housing sections. The utility tool may have additional tools that are spring-loaded to facilitate opening the tools and maintaining the tools in a closed configuration.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: July 23, 2019
    Assignee: SIYA, INC.
    Inventor: Sudhir Mundhra
  • Patent number: 10160122
    Abstract: A folding knife having a blade pivotably connected to a handle. The blade has a tang including a contoured peripheral surface and an open block engagement tang surface, and an axis of rotation. The handle has a slot having at least one top surface. The knife has a locking block translatable on a plane orthogonal to the axis of rotation of the blade. The locking block has an engagement surface positioned to contact at least one of the contoured peripheral surface and the open block engagement tang surface when the blade is in an open position. The locking block has at least two bearing surfaces engaging the at least one top surface along two lines, with the at least two bearing surfaces positioned so that a force applied by the blade to the engagement surface is directed along a line between the at least two bearing surfaces.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: December 25, 2018
    Inventor: Jerry P. Busse
  • Patent number: 10035272
    Abstract: A folding knife has an elongated frame defining a major plane and having a pivot element at a pivot end and defining a pivot axis and the frame defining a blade receptacle, an elongated blade occupying the major plane having a tip end and a base end, a spine edge and a cutting edge, and opposed major faces, the base end connected to the pivot element, the blade being operable to pivot between a stowed position in which the blade is received in the blade receptacle and an extended position in which the tip end of the blade extends away from the frame, and the blade having a lock feature proximate the base end, a button lock element connected to the frame proximate the pivot element and operable to selectably engage the lock feature when the blade is in the extended position.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: July 31, 2018
    Assignee: HOGUE TOOL & MACHINE, INC.
    Inventor: James David Bruhns
  • Patent number: 9975259
    Abstract: The invention discloses a folding knife, comprising: a blade, whose upper part is configured with a lockup switch mounting hole; a handle, whose lower part is configured with a stopping slot; a lockup switch provided in the lockup switch mounting hole and having a lockup part located on the first side of the blade, the lockup part has a lockup position at which it is clapped in the stopping slot when the blade and the handle are buckled up and an unlock position at which it is released from the stopping slot when the blade is separated from the handle. The folding knife of the invention enables safe locking after the blade is folded in the handle by making use of the lockup switch having a lockup part, the structure of the folding knife is simple and easy to implement, and safety performance of the folding knife is improved.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: May 22, 2018
    Assignees: Power Source Industries Co. Ltd., Nextorch Industries Co., Ltd., Wave Power Source Police Equipments Co., Ltd
    Inventor: Guanpeng Liu
  • Patent number: 9943970
    Abstract: A locking mechanism for a folding knife is provided. More specifically, the locking mechanism is a rotational wedge locking mechanism that maintains the folding knife's blade in an extended position and prevents the blade from inadvertently closing when the knife is in use in the extended position. The rotational wedge locking mechanism also impedes the folding knife from inadvertently opening when the blade is in a closed position of storage. The rotational wedge locking mechanism generally comprises a lock pin, a means for moving the lock pin, and a biasing member, which work in conjunction with the tang of the blade and the back spacer to securely retain the folding knife in an open or closed position.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: April 17, 2018
    Assignee: Spyderco, Inc.
    Inventor: Louis Sal Glesser
  • Patent number: 9908231
    Abstract: Provided is a tool that includes a handle assembly including a top portion and a bottom portion. The tool also includes a lock plate disposed between the top and bottom portions and having a deflectable arm having a free end biased towards the top portion, a fixed end opposite the free end, an inner edge, an outer edge, and a detent near the free end and the inner edge. The tool additionally includes a blade having first and second ends, an indent in a bottom surface of the blade near the first end for engaging the detent in a closed position, and a ramp on the bottom surface near the indent defining a reduced thickness portion of the blade that reduces in thickness from the indent towards an edge of the blade to reduce contact between the detent and the blade during rotation of the blade.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: March 6, 2018
    Assignee: The Sherwin-Williams Company
    Inventors: Victor J. Levand, Sharad Gaurav, Sarah Bridget Mulroy, Joshua R. Robertson, Edward Ray Goodwin, Randi Boss, Michael C. Lambertson, Jr.
  • Patent number: 9833912
    Abstract: Folding knife embodiments are disclosed herein comprising a blade operable to pivot relative to a handle, between an open position and a closed position, about a pivot axis extending through a tang portion of the blade having at least one locking recess. The knife can have a locking mechanism comprising a rod that extends along the pivot axis through the tang portion and a locking member coupled to the rod which engages the at least one locking recess of the tang portion when the blade is in at least one of the open position or the closed position. The knife can further comprise a push button coupled to the rod, wherein depression of the push button is configured to eject the locking member from the locking recess in the blade, thereby unlocking the blade.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: December 5, 2017
    Assignee: GB II Corporation
    Inventor: Flavio Yuji Ikoma
  • Patent number: 9815213
    Abstract: A folding knife has ambidextrously accessible trigger mechanism for releasing the blade from its open and locked position so that it may be moved to the closed position, and when the knife is fitted with an automatic opening mechanism, for releasing the blade from its closed and locked position to the open and locked position. When the blade reaches the open position a novel locking mechanism securely locks the blade open. The trigger mechanism comprises a button on each side of the knife handle. The user may fire the automatic opening mechanism by depressing either the right or left hand trigger button, or both simultaneously. The release mechanism may be incorporated in an auto-assist or manual knife. The locking mechanisms described herein may be incorporated into a manual opening knife or a knife with an auto-assist opening mechanism and in all cases, the knife incorporates a locking mechanism that locks the blade open in a highly secure manner.
    Type: Grant
    Filed: February 22, 2014
    Date of Patent: November 14, 2017
    Assignee: Benchmade Knife Co., Inc.
    Inventor: Wes Duey
  • Patent number: 9579807
    Abstract: A foldable knife with multiple switching modes comprises a knife handle, a blade and a switch device. The knife handle has a resisting elastic plate, a positioning plate and a top cover. The resisting elastic plate has an elastic portion. The positioning plate is connected to the resisting elastic plate and has an elastic arm extended in the positioning plate. The top cover is mounted on the positioning plate and has a slide slot. The slide slot is formed on the top cover. The blade has a pressing rod and a manual pushing rod which are respectively formed on a surface of the blade towards the positioning plate. The switch device is mounted in the slide slot and has a pushing block mounted through the top cover, and the switch device is used to switch between an assisted opening mode and a manual opening mode.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: February 28, 2017
    Inventors: Hui-Tung Chu, Jiun-Yu Chu
  • Patent number: 9387595
    Abstract: An exemplary folding knife has a handle including an inner liner portion and an outer panel. The inner liner portion includes a locking member that is operable to move between an unlocked position and a locked position. The folding knife includes a blade having a tang portion pivotally connected to the handle. The blade is operable to pivot relative to the handle about a pivot axis extending through the tang portion between a closed position and an open position. The tang portion engages the locking member when the blade is in the open position and the locking member is in the locked position. The folding knife also includes a lever member pivotally mounted to the locking member. The lever member is operable to block the locking member from moving from the locked position to the unlocked position when the blade is open.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: July 12, 2016
    Assignee: GB II Corporation
    Inventor: Flavio Ikoma
  • Patent number: 9327413
    Abstract: A locking mechanism for a folding knife is provided. More specifically, the locking mechanism is a two-piece backlock that maintains the folding knife's extended position and prevents the blade from inadvertently closing when the knife is in use in the extended position and impedes the folding knife from inadvertently opening when the knife is in a closed position of storage. The locking mechanism generally comprises a backlock, a toggle, and a biasing member. The toggle rotates between two positions and engages with the tang of the blade and the backlock.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: May 3, 2016
    Assignee: Spyderco, Inc.
    Inventor: Kimiyuki Sakai
  • Patent number: 9211649
    Abstract: A guard for a folding knife which guard protects the fingers of the user when the blade is open. The guards may be lifted by the movement of the blade by a link, spring, lifting pin, gears, underside of the blade or hooked by thumb stud or back of blade or by a flipping motion due to the contour of the handles. The guards may be of various shapes and may be recessed in an out-of-the-way position when the blade is closed. The guards may extend at opposite sides of the blade and opposite sides of the handle. The guards are adaptable to a wide variety of folding knife styles.
    Type: Grant
    Filed: September 9, 2012
    Date of Patent: December 15, 2015
    Inventors: Mark Mollick, Paul Mollick
  • Patent number: 8966768
    Abstract: Disclosed herein is a folding tool having a handle, a tool element and a ball bearing assembly. In some embodiments of the present disclosure, the handle of the folding tool includes a first, second side panel and a first, second side panel liner wherein the ball bearing assembly is positioned between the first side panel liner and the second side panel liner. The ball bearing assembly includes a first bearing race and a second bearing race each race having a ball housing. A plurality of balls reside partially within each ball housing and are positioned to contact an adjacent side surface of the tang of the tool element thereby allowing the plurality of balls to roll along opposing sides of the tang as the tool element is pivoted from the open position to the closed position. In some embodiments, the tool element is a knife blade.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: March 3, 2015
    Assignee: GB II Corporation
    Inventor: Kenneth J. Onion
  • Patent number: 8959779
    Abstract: A multi-angle positioned foldable knife includes a knife body (1), a handle (2) and a pin (3). The knife body (1) is pivotally connected with the handle (2) through the pin (3). A cam (4) is arranged on the connecting end of the knife body (1), and snap openings (41) on the outer edge of the cam are provided to position the knife body (1) at multi-angle relative to the handle (2). A positioning button (5) is arranged on the connecting end of the handle (2), and a snap edge (51) is provided on the interior end of the button (5). The snap edge (51) can connect with a snap opening (41) on the outer edge of the cam (4). Compared with prior art, the foldable knife has simple structure, controlled angle, safe use, convenient operation, simple preparation etc. The knife body (1) can be positioned at multi foldable position. Additionally, the rotation of the knife body (1) can be achieved only by pressing the button (5).
    Type: Grant
    Filed: September 26, 2010
    Date of Patent: February 24, 2015
    Assignee: Kunjek Handtools & Hardware Co., Ltd.
    Inventor: Hao Wen
  • Patent number: 8938883
    Abstract: A folding knife for applying a cutting action includes a blade assembly having a guard configured to cover the cutting edge of the blade when the knife is not in use. The guard is maintained in a normally blade covered position by a resilient member. The blade guard has a guard actuator for providing at least one motion for a user to move the blade guard from the normally blade covered position to an un-guarded or cutting position. The knife further includes an actuator for unlocking the blade assembly from the closed position to a locked open position. Upon depression of the actuator, the blade assembly will automatically open to a locked open position from a locked closed position.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: January 27, 2015
    Assignee: Allway Tools, Inc.
    Inventors: Donald Gringer, Yuan Fang Cheng
  • Patent number: 8939053
    Abstract: An assisted opening mechanism for folding knives, which helps hold the blade in the closed position, as well as, assists in moving the blade toward the open position. The mechanism includes a bar spring seated within one of the handle sides and a contact pin extending from the blade. The bar spring is seated within a recessed cavity formed on one side of the knife handle and engages the contact pin, which extends outward from one side of the blade through an arcuate slot in the handle side.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: January 27, 2015
    Inventor: Joseph R. Pardue
  • Patent number: 8939054
    Abstract: An improvement of a folding knife locking mechanism with an adjustable wedge to remove blade slop. The present mechanism allows for smooth opening and closing of the blade by limiting friction against the blade as it rotates. This knife has a bearing system for low friction blade rotation. Also the leaf strap lock is arranged so that it only comes into contact with the blade at the start of opening and at the end of opening, further limiting the friction forces against the blade. Provided is also an adjustment wedge to remove blade lock slop. In the manufacturing process loose tolerances can be adjusted out using the adjustment wedge. Normal use wear against the stop pins and handles can cause some looseness of the blade which can also be removed by the adjustment wedge.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: January 27, 2015
    Assignee: Buck Knives, Inc.
    Inventors: Grant Woodrow Hawk, Gavin D. Hawk
  • Patent number: 8863393
    Abstract: The present invention is to provide a folding knife with two-stage lock release, which comprises a handle including three plates, and a blade pivotally installed between first and second plates. The second plate has an elastic stop plate installed thereon having a first engage portion, such that after the blade is turned out from the handle completely, the elastic stop plate can abut against the blade. A positioning plate including a second engage portion is movably positioned between the second and third plates, and has an end extended out from the handle, such that when the blade is unfolded completely and the positioning plate is moved and fixed to a pressed position, the first and second engage portions can be engaged with each other, and the elastic stop plate can be separated from the blade, so as to enable the blade to be turned into the handle.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: October 21, 2014
    Inventor: Shun-Fu Chen
  • Patent number: 8813366
    Abstract: The present invention relates to a folding knife handle, which includes a first housing pivotally connected to a blade and formed with an arcuate guide groove through which a stud of the blade passes, a pushing element movably located on the first housing and having one end exposed from the handle, a pressing element connected to the pushing element and having one end provided with a pressing plate, and a second housing assembled to the first housing to cover the pressing element. When the stud is located at a first end of the arcuate guide groove and the pressing plate doesn't press against the stud, the blade is fully received in the handle and, when the pressing plate presses against and moves the stud toward a second end of the arcuate guide groove, the stud is driven by a resilient member to move the blade fully out of the handle.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: August 26, 2014
    Inventor: Chia-Ying Chen
  • Patent number: 8793882
    Abstract: A cutter apparatus includes a housing, multiple tools mechanically coupled to the housing, at least one of the tools including a cutting device, and a slider and lock wheel mechanically coupled to the housing and configured to selectively release only one of the tools at a time from being secured within the housing.
    Type: Grant
    Filed: July 30, 2011
    Date of Patent: August 5, 2014
    Assignee: Pacific Handy Cutter, Inc.
    Inventors: Glen Kanemoto, John Andrew Duval
  • Patent number: 8752298
    Abstract: A folding knife includes a lock blade and a handle. The handle includes a transfer bar assembly and a blade opener spring. When the lock blade is closed, a spring working in conjunction with the transfer bar assembly biases the lock blade closed. When the lock blade is opened past a certain point, a blade opening spring assists in moving the lock blade into its open locked position.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: June 17, 2014
    Inventors: Michael C. Collins, Jane Collins
  • Patent number: 8745878
    Abstract: A folding knife locking mechanism is provided which maintains the open and closed positions associated with the folding knife. A carrier assembly for the locking mechanism for changing the folding knife from the closed to the open position is also disclosed. In one embodiment, the folding knife comprises a carrier assembly for positioning a spherical locking mechanism against the tang of the knife, without the need for scales or other retaining elements typical in prior art knives.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: June 10, 2014
    Assignee: Spyderco, Inc.
    Inventor: Eric G. Glesser
  • Patent number: 8732958
    Abstract: A locking mechanism for a folding knife includes a thumb post which longitudinally moves along slots in the handle of the knife. The thumb post is urged by a spring loaded locking lever into a notch in the base of the blade of the knife. When so positioned the thumb post retains the blade in an extended position. When the user pushes the thumb post out of the notch, the blade can be folded into the handle of the knife. In another embodiment the thumb post is an integral part of the locking lever, and it is a tab on the locking lever rather than the thumb post engages the notch in the base of the blade.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: May 27, 2014
    Inventor: Yi Huang
  • Publication number: 20140115899
    Abstract: A folding knife having a back bar configured to engage the tang portion of a blade. A release member mechanism is utilized to engage the back bar to apply force thereto to at least partially disengage the back bar from the tang portion of the blade for purposes of repositioning the blade with respect to the handle.
    Type: Application
    Filed: October 29, 2012
    Publication date: May 1, 2014
    Inventor: Spencer Frazer
  • Patent number: 8707564
    Abstract: A hand saw includes a saw blade, a handle, and a blade carrier. The saw further includes a blade clamp assembly having a locking member that removably couples the saw blade to the blade carrier so that the saw blade pivots with the blade carrier about a pivot axis. An actuating button is manually movable generally transverse to a longitudinal axis of the saw blade by the user between an engaged position and a disengaged position. In the engaged position, the actuating button engages the blade carrier to retain the blade carrier and the saw blade in one of an extended position and a folded position. In the disengaged position, the actuating button is disengaged from the blade carrier so that the blade carrier and the saw blade can be pivoted between the extended and the folded positions of the saw blade.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: April 29, 2014
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Wade Burch, Michael S. Steele, Jason R. Crowe, Michael Naughton
  • Patent number: 8683702
    Abstract: A folding knife capable of preventing automatic folding, which includes a handle having first, second and third plates, and a blade pivotally connected between the first and second plates by a pivot. The second plate is provided with a resilient stopper having a first end fixed to the second plate and a second end extending toward the first plate in a slanting manner. The third plate has one side corresponding in position to the second plate and concavely provided with an engaging hole. When the blade is fully rotated out of the handle, the second end of the resilient stopper presses against one end of the blade and thereby keeps the blade fully rotated out of the handle. Thus, when a force applied to the blade is excessively large, the resilient stopper will not be shifted away from the position against the blade.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: April 1, 2014
    Inventor: Yen-Fen Lo
  • Patent number: 8646184
    Abstract: In a folding knife in which a release button is used to lock the blade in the open and/or closed positions, and to release the blade from being locked, the release button has a dual tapered sidewall surface on the locking portion of the button.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: February 11, 2014
    Assignee: Mentor Group, L.L.C.
    Inventor: James Westerfield
  • Patent number: 8607460
    Abstract: A single spring arm assisted knife includes a base frame and a blade. A spring arm is formed as an integral portion of the base frame. A frame lock is also formed as an integral portion of the base frame. One end of the blade is pivotally retained by one end of the base frame at a blade pivot point. A thumb stud is secured to the blade. A stop pin is pressed into the base frame, adjacent the blade pivot point. A roller is pivotally retained on one end of the spring arm. An assist cam surface is formed on the one end of the blade to receive the roller. A second embodiment of the single spring arm assisted knife includes a spring arm which is not an integral portion of the base frame, but is attached to the base frame.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: December 17, 2013
    Inventors: Matthew J. Lerch, Kenneth A. Steigerwalt
  • Patent number: 8601699
    Abstract: A utility knife includes a handle having a blade track system with a pivot point and a blade mounted in the blade track system. The blade includes a cutting/scraping edge extending along a side of the blade. In an implementation, the blade is shiftable between a closed configuration, where the cutting/scraping edge is enclosed within the handle, to a first open configuration, where the blade extends longitudinally outward from an end of the handle. The shift between the closed and first open configurations can occur by rotating the blade about the pivot point and in the blade track system. Also, the blade is shiftable along the blade track system between the first open configuration and a second open configuration, where the blade is located towards another end of the handle such that the cutting/scraping edge extends downwards from a bottom of the handle.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: December 10, 2013
    Assignee: Blade-Tech Industries, Inc.
    Inventor: Isaac Vellekamp
  • Patent number: 8595942
    Abstract: A safe utility knife is provided having a housing, a blade sliding seat, a pushing force generator, an acceleration detector, a stopper, a stopper pushing portion, and a sliding switch. When activated with a blade protruding out, and an acceleration due to a sudden dropping movement occurs, the acceleration detector moves from a low acceleration position to a high acceleration position. It also presses down the sliding switch and the stopper so that the stopper moves from a locking position to a non-locking position. The blade sliding seat is pulled by the pulling force generator to a blade storing position to protect against accidental injury. The knife can be operated by one hand and is suitable for regular blades available on the market. In addition, it can be switched to manual automatic blade returning mode.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: December 3, 2013
    Inventor: Chun-Feng Ho
  • Patent number: 8584367
    Abstract: A pocketknife has a handle, a blade, an assistant assembly and a locking assembly. The handle has a cavity defined in the handle. The blade is mounted pivotally at one end of the handle. The assistant assembly is mounted on the handle, assists to extend the blade out or retract the blade in the cavity and has a dial, a biasing lever and a spring. The dial is mounted rotatably in the handle and is connected securely on a proximal end of the blade. The biasing lever is mounted in the handle and is mounted eccentrically and pivotally on the dial. The spring is mounted around the biasing lever and biases the biasing lever to rotate the dial in two rotational directions to retract or extend the blade. The assistant assembly assists the user to open or close the pocketknife.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: November 19, 2013
    Inventors: Hui-Tung Chu, Jiun-Yu Chu
  • Publication number: 20130291389
    Abstract: The present invention relates to a folding knife handle, which includes a first housing pivotally connected to a blade and formed with an arcuate guide groove through which a stud of the blade passes, a pushing element movably located on the first housing and having one end exposed from the handle, a pressing element connected to the pushing element and having one end provided with a pressing plate, and a second housing assembled to the first housing to cover the pressing element. When the stud is located at a first end of the arcuate guide groove and the pressing plate doesn't press against the stud, the blade is fully received in the handle and, when the pressing plate presses against and moves the stud toward a second end of the arcuate guide groove, the stud is driven by a resilient member to move the blade fully out of the handle.
    Type: Application
    Filed: June 29, 2012
    Publication date: November 7, 2013
    Inventor: Chia-Ying CHEN
  • Patent number: 8572851
    Abstract: A folding knife incorporates an opening assist mechanism that functions to drive the blade from the closed to the open position. A torsion spring is retained axially on the blade axis pin and within a bushing that is stationary relative to the knife handle. One leg of the spring is fixed relative to the handle. The opposite leg of the spring extends through and rides in a partial annular groove in the bushing and acts on the blade as it is moved between the open and closed positions.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: November 5, 2013
    Assignee: Mentor Group, L.L.C.
    Inventor: Wes Duey
  • Patent number: 8567069
    Abstract: A folding utility knife with a blade lock and release mechanism is provided, and the knife comprises: a handle pivotally connected to a blade holding compartment, the handle comprising at least two side walls forming a space, the space of the handle is designed to encase at least a portion of the blade holding compartment during a folded position, the blade holding compartment comprising at least one side wall having at least two internal cavities, the first cavity for holding a blade with at least two indentations, at least a portion of the blade holding compartment designed to be situated within the space of the handle during a folded position, the blade holding compartment comprises a front end, a rear end and a faceplate for covering the internal cavities, the front end of the blade compartment holder and at least a portion of the faceplate forming an opening at the front end of the blade holding compartment which allows a portion of the blade to protrude from the blade holding compartment; and a blade lo
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: October 29, 2013
    Assignee: IBT Holdings, LLC
    Inventors: Glenn Robinson, Michael Martinez
  • Patent number: 8499461
    Abstract: A locking mechanism for a folding knife. The locking mechanism has a locking sleeve and an opposed locking bolt which are coaxial and biased to a locking position by a spring. In the locked position, either with the blade extended or folded, both a lug on the bolt and a surface on the sleeve engage a locking surface on the blade tang area. Simultaneous manual force must be applied by the user to oppositely release buttons on the opposite handles to move both the locking bolt and locking sleeve to positions to disengage them from the locking surface to allow the blade to be folded or unfolded.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: August 6, 2013
    Inventors: Mark Mollick, Paul Mollick
  • Patent number: 8458913
    Abstract: The present invention is to provide an assisted-opening folding knife, which includes a handle having a first positioning groove and a first recess, a blade capable of pivotally springing out of the handle, and a pushing device. A first post on the blade is moved along the first recess while being rotated into the handle, and a second post on the blade is exposed outside the handle while being received in the handle. The pushing device includes a pushing element located in the first positioning groove and a second spring provided between the pushing element and the first positioning groove, so as for the pushing element to move along the groove. Thus, while the blade is rotated into the handle, the first post presses and passes the tip of the pushing element and is then blocked by the pushing element, thereby preventing the blade from springing out of the handle.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: June 11, 2013
    Inventor: Yen-Fen Lo
  • Publication number: 20130133205
    Abstract: The present invention is to provide an assisted opening folding knife, which includes a handle, a blade pivotally connected to the handle, a sliding key, and a first resilient element having one end positioned in the handle and an opposite end pressing against an end of the blade. The sliding key is provided adjacent to a front end of the handle, and has a sliding portion exposed from the handle and a pressing portion opposite to the sliding portion. When the blade is received in the handle and the sliding portion is driven to move the sliding key and release the blade, the pressing portion presses the blade to rotate a predetermined angle for enabling the first resilient element to pop the blade out of the handle. Thus, a user only has to slide the sliding key to release and pop the blade out of the handle automatically.
    Type: Application
    Filed: January 11, 2012
    Publication date: May 30, 2013
    Inventor: Yen-Fen LO
  • Patent number: 8438738
    Abstract: The present invention is to provide a safety folding knife comprising a blade having an end pivotally coupled to an end of a handle, such that the other end of the blade can be rotated out of or into the handle. The handle includes an elastic stop plate therein, which has an end fixed onto the handle and the other end tilted and extended towards a side of the blade. When the blade is turned fully out of the handle, the other end of the elastic stop plate can be abutted against the end of the blade so as to maintain the blade in a fully opened state, and a resisting block installed inside the handle then moves and firmly blocks the elastic stop plate to avoid the blade from being accidentally turned backward to the handle.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: May 14, 2013
    Inventor: Yen-Fen Lo
  • Patent number: 8413338
    Abstract: A folding knife includes a handle, an axle coupled to a first end of the handle, and a blade rotatably coupled to the axle. The blade includes a working portion and a tang, the blade having an open position in which the working portion extends from the handle and a closed position in which the working portion is substantially received within the handle. The folding knife further includes a lock having a locked position in which the lock prevents rotation of the blade and an unlocked position in which the lock permits rotation of the blade. The knife further includes a spring arm in the handle and a safety coupled to the handle, the safety having a first position in which the safety deflects the spring arm into the path of the lock to maintain the lock in the locked position and a second position in which the safety permits the lock to move from the locked position to the unlocked position.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: April 9, 2013
    Assignee: Fiskars Brands, Inc.
    Inventor: Jeffrey Freeman
  • Patent number: 8402662
    Abstract: A removable knife opening assist for a folding knife. The removable knife opening assist includes a hook and an attachment portion. The folding knife is configured to be stored in a folded condition in a container. The removable knife opening assist is configured to snag the container so that the folding knife is automatically opened for use when the folding knife is withdrawn from the container, without the need to manipulate the knife, other than the simple withdrawal of the folding knife from the container.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: March 26, 2013
    Inventor: Ronald E. Douzanis
  • Publication number: 20130061478
    Abstract: A cutter apparatus includes a housing with an opening, and a blade carrier coupled to the housing to permit rotational movement of the blade carrier between a refracted position and a deployed position and to permit movement of the blade carrier toward a distal end of the cutter in response to a cutting edge of the blade coming into contact with a workpiece, the blade carrier being coupled to the housing and configured for holding and deploying a blade at a plurality of selectable blade depths and for preventing the blade carrier from rotating back into the housing when the blade carrier is deployed at any of the selectable blade depths and advanced to a cutting position.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 14, 2013
    Inventors: Joseph L. Lutgen, Markus E. Gropl, Brandon L. Spoelstra, Joseph P. Garavaglia
  • Publication number: 20130047439
    Abstract: An improvement of a folding knife locking mechanism with an adjustable wedge to remove blade slop. The present mechanism allows for smooth opening and closing of the blade by limiting friction against the blade as it rotates. This knife has a bearing system for low friction blade rotation. Also the leaf strap lock is arranged so that it only comes into contact with the blade at the start of opening and at the end of opening, further limiting the friction forces against the blade. Provided is also an adjustment wedge to remove blade lock slop. In the manufacturing process loose tolerances can be adjusted out using the adjustment wedge. Normal use wear against the stop pins and handles can cause some looseness of the blade which can also be removed by the adjustment wedge.
    Type: Application
    Filed: August 28, 2012
    Publication date: February 28, 2013
    Applicant: Buck Knives, Inc.
    Inventors: Grant Woodrow Hawk, Gavin D. Hawk
  • Patent number: 8375590
    Abstract: A folding knife incorporates an opening assist mechanism that functions to drive the blade from the closed to the open position. A torsion spring is retained axially on the blade axis pin and within a bushing that is stationary relative to the knife handle. One leg of the spring is fixed relative to the handle. The opposite leg of the spring extends through and rides in a partial annular groove in the bushing and acts on the blade as it is moved between the open and closed positions.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: February 19, 2013
    Assignee: Mentor Group, L.L.C.
    Inventor: Wes Duey
  • Patent number: 8375589
    Abstract: A folding knife in exemplary embodimentsTong comprises a handle portion, a blade, a locking cross-bolt, and a motion limiting member coupled to the handle. When the blade is in the closed position, the motion limiting member is in a first position that prevents the cross-bolt from moving to its locked position. When pivoting the blade to the open position, the motion limiting member moves to a second position that does not prevent the cross-bolt from moving to its locked position. A biased safety mechanism can also be used to block the cross-bolt from moving to an unlocked position.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: February 19, 2013
    Assignee: GBII Corporation
    Inventors: Rodney L. Bremer, Douglas B. Flagg, Tong Chiu
  • Publication number: 20120324738
    Abstract: A pocketknife has a handle, a blade, an assistant assembly and a locking assembly. The handle has a cavity defined in the handle. The blade is mounted pivotally at one end of the handle. The assistant assembly is mounted on the handle, assists to extend the blade out or retract the blade in the cavity and has a dial, a biasing lever and a spring. The dial is mounted rotatably in the handle and is connected securely on a proximal end of the blade. The biasing lever is mounted in the handle and is mounted eccentrically and pivotally on the dial. The spring is mounted around the biasing lever and biases the biasing lever to rotate the dial in two rotational directions to retract or extend the blade. The assistant assembly assists the user to open or close the pocketknife.
    Type: Application
    Filed: June 24, 2011
    Publication date: December 27, 2012
    Inventors: Hui-Tung Chu, Jiun-Yu Chu
  • Publication number: 20120304470
    Abstract: A folding tool includes a handle and an implement pivotally coupled to the handle. The implement is adapted to travel between a closed position and an open position. The implement includes a tang having a contoured surface. The folding tool also includes a locking device movable between a locked position and an unlocked position along an axis that is transverse to a plane defined by the implement. The folding tool further includes a cantilever spring having a first end coupled to the handle and a second end adapted to interact with the tang of the implement. The spring exerts a closing force on the implement when the blade is in a closed position. The spring exerts an opening force on the implement during at least a portion of the travel of the implement between the closed position and the open position.
    Type: Application
    Filed: May 31, 2011
    Publication date: December 6, 2012
    Inventor: Jeff Freeman
  • Patent number: 8296958
    Abstract: A folding knife having a back bar configured to engage the tang portion of a blade. A release member mechanism is utilized to engage the back bar to apply force thereto to at least partially disengage the back bar from the tang portion of the blade for purposes of repositioning the blade with respect to the handle.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: October 30, 2012
    Assignee: SOG Specialty Knives and Tools, LLC
    Inventor: Spencer Frazer
  • Patent number: RE43908
    Abstract: An improvement for a dual handle fighting knife having interlocking handles when in open position and multiple spring blades stabilization in open and closed position. The handle blade spring engagement provides for a safe, straight-forward interlocking blade position and spacing of said cutting edge engagement with said handle when in closed position.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: January 8, 2013
    Assignee: Cold Steel
    Inventor: Andrew Demko