Spring-opened Patents (Class 30/159)
  • Patent number: 10750846
    Abstract: A buckle, such as for a strap or belt, houses a compact multi tool that is removable from the buckle. The arrangement includes a retention mechanism so the removable multi tool stays secure even with excessive body motion. The buckle can be any type of buckle for a belt or other type of strap. The buckle can couple a belt or strap to itself to create a loop or can couple strap portions to one another. The buckle functionality can be provided by any suitable arrangement, such as a cam lock mechanism, a pin or post-in-hole arrangement or a snap-fit arrangement, for example and without limitation. The multi-tool can include one or more articulating (e.g., foldable) tool elements. In some configurations, the multi-tool comprises a sleeve that receives a body of the multi-tool. The sleeve can include tool features.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: August 25, 2020
    Assignee: FIX MANUFACTURING, LLC
    Inventors: Anthony Norman Zentil, Robert Jerome Stemen
  • Patent number: 10321752
    Abstract: A buckle, such as for a strap or belt, houses a compact multi tool that is removable from the buckle. The arrangement includes a retention mechanism so the removable multi tool stays secure even with excessive body motion. The buckle can be any type of buckle for a belt or other type of strap. The buckle can couple a belt or strap to itself to create a loop or can couple strap portions to one another. The buckle functionality can be provided by any suitable arrangement, such as a cam lock mechanism, a pin or post-in-hole arrangement or a snap-fit arrangement, for example and without limitation. The multi-tool can include one or more articulating (e.g., foldable) tool elements. In some configurations, the multi-tool comprises a sleeve that receives a body of the multi-tool. The sleeve can include tool features.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: June 18, 2019
    Assignee: Fix Manufacturing, LLC
    Inventors: Anthony Norman Zentil, Robert Jerome Stemen
  • Patent number: 10264872
    Abstract: A wearable device is disclosed. A wearable device according to an embodiment relates to a mechanism, including: a wearing unit configured to be mounted on any one of a human, an animal, and a mechanical device; a housing configured to be coupled to the wearing unit and to accommodate a tool having a predetermined function; and a power transmission unit configured such that one end thereof is coupled to a part of the wearing unit and the other end thereof comes into contact with the tool, thereby moving in conjunction with movement of the human, animal or mechanical device and transmitting force to the tool; wherein when a part of the human, animal, or mechanical device moves, the tool receives force from the power transmission unit and projects out of the housing, and to the utilization of the mechanism.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: April 23, 2019
    Assignees: SPHEREDYNE CO., LTD.
    Inventor: Sug-Whan Kim
  • Patent number: 10131059
    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, a blade-locking member disposed in the handle and being moveable in a first direction between an unlocked position and a locked position to retain the blade in at least one of the open or closed positions. The folding knife may further comprise a safety member mounted on the blade-locking member and being moveable relative thereto in a second direction between a release position and a safety position. Wherein when the safety member is in the safety position, the safety member and the blade-locking member are blocked from moving in the first direction, and wherein when the safety member is in the release position, the safety member and the blade-locking member can be moved in the first direction to move the blade-locking member to the unlocked position.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: November 20, 2018
    Assignee: GB II Corporation
    Inventor: Flavio Yuji Ikoma
  • Patent number: 9908245
    Abstract: A folding knife, including a handle, with at least two parts connected to form a cavity therebetween, and a blade having a sharpened edge and a tang. The blade is rotatable between an open position and a closed position. The blade defines a first plane inside the cavity. The tang includes a step protrusion and a rounded protrusion. A stop pin restricts movement of the blade in an opening direction. The folding knife also includes a locking member rotatable from a first position, allowing the blade to rotate, to a second position blocking rotation of the blade by engaging one of the tang's protrusions. The engagement of the locking member with the step protrusion of the tang locks the blade in its open position, and the engagement of the locking member with the rounded protrusion of the tang locks the blade in its closed position.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: March 6, 2018
    Assignee: Sport Manufacturing Group Inc.
    Inventor: Anton Tkachenko
  • Patent number: 9862104
    Abstract: A folding knife has mechanisms for facilitating dual operational modes for opening the blade. In a first modality, the knife is opened and closed manually. In a second modality, the knife is fully automatic. When the blade is in the closed position the user may use either mode, manual or automatic, without any switching mechanism. A lock securely locks the blade in the open position when either opening modality is being used. To open the blade manually, the user rotates the blade from the closed to the open position—the lock automatically locks the blade open when the blade is fully open. To open the blade automatically, the lock mechanism functions as the trigger mechanism; the user slides the lock mechanism to actuate the automatic open mechanism. When the blade is in the fully open position the lock secures the blade open. A torsion spring around the pivot shaft that connects the blade to the handle and which is retained in a bushing drives the blade open in the automatic mode.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: January 9, 2018
    Assignee: Benchmade Knife Co., Inc.
    Inventor: Jason France
  • Patent number: 9707687
    Abstract: A knife includes a handle and a blade coupled to the handle so as to be movable between an open position in which the blade extends from the handle, and a closed position, in which the blade is received within the handle. An assisted opening mechanism is operatively coupled between the blade and the handle, and is configured to provide an opening-assist to the blade. An engagement mechanism is also provided, which is switchable between an engaged condition, in which the assisted opening mechanism is enabled, and a disengaged condition, in which the assisted opening mechanism is disabled such that it does not provide an opening assist to the blade.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: July 18, 2017
    Assignee: KAI U.S.A., LTD.
    Inventor: Kenneth J. Onion
  • Patent number: 9592612
    Abstract: A folding tool with improved locking features is provided. The locking feature comprises a substantially rigid member disposed between or proximal to a handle portion of the tool. The substantially rigid member comprises a bifurcated end forming at least one biased member for contacting a tang of the tool and securing the tool in at least one of a closed and an open position with additional locking features.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: March 14, 2017
    Assignee: Spyderco, Inc.
    Inventor: Tom D. Koenig
  • Patent number: 9492916
    Abstract: A folding tool with an improved locking mechanism is provided. The locking mechanism includes a biasing member interconnected to a handle of the tool and coupled to an engagement member, which may be a push button. In various embodiments, the biasing member biases the engagement member towards a locked position in which a portion of the engagement member interacts with a tang of an implement to prevent rotation of the implement.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: November 15, 2016
    Assignee: Spyderco, Inc.
    Inventors: Douglas S. Snyder, Tom D. Koenig
  • Patent number: 9364957
    Abstract: A folding knife has a handle portion and a safety liner with a spring biased portion that slides laterally lodging the end of the spring biased portion under the tang of the knife blade to hold the blade in a safe open position. An adjustment screw has an extended ball surface disposed in a sleeve extending through and attached to one side of the handle and the safety liner. A rotational safety has a safe on detent and a safe off detent for receiving the ball is disposed between the safety liner and the tang of the blade. The blade is secured in the open position by rotating the rotational safety to a safe on position, lodging a safety engagement end under an edge of the spring safety portion of the safety liner and lodging the ball surface into the safe on detent. The adjustment screw is adjusted by to maintain the safety of the knife over time.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: June 14, 2016
    Inventor: Ronald W. Lake
  • Patent number: 9302399
    Abstract: The present invention is to provide a folding knife, which includes a handle provided therein with first and second slots, wherein the first slot extends slantingly from a first end toward a second end of the handle; a pushing element formed with a third slot slantingly extending in a direction opposite to the first slot and at least one post; and a pressing element having one end pivotally provided in the handle and another end provided with at least one sliding block capable of moving in the first and third slots and an abutting portion capable of abutting against the blade. When the pushing element is pushed, the post moves along the second slot and drives the sliding block to move along the first and third slots, thereby enabling the abutting portion to apply force to the blade and rotate the blade out of the handle to a predetermined angle.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: April 5, 2016
    Inventor: Chih-Chen Kao
  • Patent number: 9132558
    Abstract: A folding knife with a handle and blade connected at a axle pin, with a tension spring within the handle pinned to the handle on one end and pinned to a flexible tendon in the form of a chain on the opposite end. The flexible tendon in the form of a chain is pinned at opposite ends to the spring and the blade at a distance from the blade axle pin. When the blade is folded about the axle pin energy is stored in the tension spring by force transferring from the blade through the flexible tendon in the form of a chain to the spring. When the blade is folded a catch blocks the blade from unfolding, and when the user actuates this blocking catch the stored energy in the tension spring is released thus causing the blade to rotate about the axis point and deploy to the opened position.
    Type: Grant
    Filed: August 18, 2013
    Date of Patent: September 15, 2015
    Inventor: Allen Millhouse
  • Patent number: 8978253
    Abstract: A modular spring assembly configured for interconnection with a folding tool is provided. The modular spring assembly may be positioned coaxially with a pivot axis of the folding tool and interconnected to the folding tool. In one embodiment, the modular spring assembly includes a cup and a torsion spring.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: March 17, 2015
    Assignee: Spyderco, Inc.
    Inventor: Douglas S. Snyder
  • Publication number: 20150047206
    Abstract: A folding knife with a handle and blade connected at a axle pin, with a tension spring within the handle pinned to the handle on one end and pinned to a flexible tendon on the opposite end. The flexible tendon is pinned at opposite ends to the spring and the blade at a distance from the blade axle pin. When the blade is folded about the axle pin energy is stored in the tension spring by force transferring from the blade through the flexible tendon to the spring. When the blade is folded a blade release catch blocks the blade from unfolding, and when the user actuates the blade release catch the stored energy in the tension spring is released thus causing the blade to rotate about the axle pin and deploy to the opened position.
    Type: Application
    Filed: August 18, 2013
    Publication date: February 19, 2015
    Inventor: ALLEN MILLHOUSE
  • 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: 8893389
    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: Grant
    Filed: May 31, 2011
    Date of Patent: November 25, 2014
    Assignee: Fiskars Brands, Inc.
    Inventor: Jeff Freeman
  • Publication number: 20140259687
    Abstract: A folding knife includes a handle, a pivot axle, a knife blade, a spring and a catch mechanism. The handle has an elongate opening and the pivot axle is adjacent one end of the handle. The knife blade has a tang at one end thereof that is pivotally mounted to the handle for pivotal movement about the pivot axle. The spring is at least partially fitted within the handle and fitted about the pivot axle for urging the knife blade from a closed position toward an open position. The catch mechanism releasably secured the knife blade at or near its closed position despite the urging of the spring.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: Bear & Son Cutlery, Inc.
    Inventor: Matthew E. GRIFFEY
  • Publication number: 20140115898
    Abstract: A method of operating a spring assisted folding knife includes the steps of: providing a spring assisted folding knife including a handle, a blade, a transfer bar assembly contained in a transfer bar assembly recess, a helical spring, and a coiled torsion spring; and pivotally moving the blade to overcome a blade closed bias force provided by the helical spring pressing against the transfer bar assembly followed by a blade opened bias provided by the coiled torsion spring, or to overcome a blade opened bias provided by the coiled torsion spring followed by a blade closed bias force provided by the helical spring pressing against the transfer bar assembly.
    Type: Application
    Filed: January 7, 2014
    Publication date: May 1, 2014
    Inventor: Jane Collins
  • Publication number: 20140053409
    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: Application
    Filed: August 27, 2012
    Publication date: February 27, 2014
    Inventor: Joseph R. Pardue
  • 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: 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
  • Publication number: 20130283620
    Abstract: A modular spring assembly configured for interconnection with a folding tool is provided. The modular spring assembly may be positioned coaxially with a pivot axis of the folding tool and interconnected to the folding tool. In one embodiment, the modular spring assembly includes a cup and a torsion spring.
    Type: Application
    Filed: April 30, 2012
    Publication date: October 31, 2013
    Applicant: SPYDERCO, INC.
    Inventor: Douglas S. Snyder
  • Publication number: 20130263455
    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: Application
    Filed: April 9, 2012
    Publication date: October 10, 2013
    Inventor: Jane Collins
  • Patent number: 8511208
    Abstract: An assisted opening multitool handle comprising a handle housing having a longitudinal axis and a lateral axis, the handle housing having first and second longitudinal regions, the handle housing having an interior surface defining a channel region. The assisted opening multitool handle further comprises a tool member pivotally attached to the handle housing and operatively configured to be positioned in a closed orientation within the channel region and configured to rotate in an opening direction to an open orientation.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: August 20, 2013
    Assignee: SOG Specialty Knives and Tools, LLC
    Inventor: Spencer Frazer
  • Patent number: 8505206
    Abstract: In certain embodiments of the present disclosure, a folding knife has a biasing mechanism, such as a spring, that applies an opening force to the blade when the blade is in the closed, or folded, position (i.e., the force of the spring creates a moment in the opening direction of the blade). The folding knife includes a latching mechanism that holds the blade in a closed and latched position against the opening force of the spring. To open the blade, manual pressure is applied to the upper edge of the blade (the edge opposite the sharpened edge) to move the blade slightly to a closed and unlatched position to release the blade from being held from the latching mechanism whereupon the blade is then free to pivot under the opening force of the spring.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: August 13, 2013
    Assignee: GB II Corporation
    Inventor: Edward Tate VanHoy
  • Patent number: 8499460
    Abstract: A spring-assisted folding knife, including a one-piece knife blade having a proximal end and including a receiver on one side of its proximal end having a through bore; a blade insert made of a separate piece of material than the blade having a rear surface configured to be seated into the receiver, an opposite front surface, and a central bore extending between the rear surface and the front surface; and a coil spring received on the rear surface of the blade insert, the coil spring having a first end secured to the blade insert and an opposite second end secured to a fixed rigid surface of the knife.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: August 6, 2013
    Inventor: Robert E. Pearman
  • Publication number: 20130160300
    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: Application
    Filed: May 15, 2012
    Publication date: June 27, 2013
    Inventor: Guanpeng Liu
  • 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
  • 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
  • Publication number: 20130067750
    Abstract: The present invention is to provide an assisted folding knife, which includes a handle; a blade having a first end pivotally connected to a first end of the handle; a first resilient element having a first end positioned proximate to a second end of the handle and a second end extending to the pivotally connecting position of the handle and blade, such that when the blade has been rotated out from the handle by a predetermined angle, the first resilient element produces a torque tending to rotate the blade out of the handle; a post fixed on the blade, and exposed outside the handle when the blade is completely received in the handle; and a poking element pivotally provided in the handle and having a first end lying outside rotation of the blade, and a second end pressed against the post when the blade is completely received in the handle.
    Type: Application
    Filed: September 15, 2011
    Publication date: March 21, 2013
    Inventor: Chih-Chen KAO
  • 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
  • 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
  • Publication number: 20120222314
    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: Application
    Filed: March 2, 2011
    Publication date: September 6, 2012
    Inventor: Yen-Fen LO
  • Publication number: 20120159789
    Abstract: A biasing system for the blade of a folding knife includes one component or assembly applying a force tending to move the knife blade from a closed position, nested in the handle, to an open position, extending from the handle. A second component or assembly resists opening of the blade, particularly when the blade is in or near the closed position. The resisting force is overcome by the opening force after the blade has been moved through a predetermined angle relative to the handle, so that the blade then opens automatically. A safety can be actuated to block opening and/or closing of the blade. The blade can have a blunt projection upon which a user may press to move the blade through the predetermined opening angle. A clip can be provided for convenient attachment of the folding knife to an object such as a garment.
    Type: Application
    Filed: December 7, 2007
    Publication date: June 28, 2012
    Inventor: Spencer Frazer
  • Patent number: 8171645
    Abstract: A folding knife incorporates an opening assist mechanism that functions to drive the blade from the closed to the open position. A pair of torsion springs held axially on the blade axis pin and within a pair of bushings are stationary relative to the knife handle. One leg of each spring is fixed to a bushing. The opposite leg of the spring rides in a pocket formed in the surface on the blade axially around the opening through which the blade axis pin is inserted. As the blade rotates from the closed position toward the open position, the legs of the springs rotate through and cooperate with structures formed on the bushings to transfer the spring pressure instantly to the blade to drive the blade open.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: May 8, 2012
    Assignee: Mentor Group, L.L.C.
    Inventor: Wes Duey
  • Publication number: 20120102758
    Abstract: An assisted-opening knife has a spring tied to a front of a blade carrier and a movable slider assembly within a slot formed through the blade carrier, so that a blade can be rapidly extended by the elastic force without going through stepwise movement. An expanded portion of the slot engaging the slider assembly allows the blade to be received in a holder and ejected only when the slider assembly fully disengages from the expanded portion, thereby generating no sudden ejection of the blade. Additionally, a safety latch securely locks the blade when the blade is fully retracted. When the blade is fully extended, a stopper engages the slider assembly to prevent the blade from being retracted during cutting and stabbing. Accordingly, the assisted-opening knife addresses a solution to rapidly extend the blade for cutting and stabbing without compromising the safety considerations.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 3, 2012
    Inventor: Ming-Tsan LEE
  • Patent number: 8020302
    Abstract: A folding knife includes a handle, a blade, a resilient element and a poking element. The blade can be turned into or out from the handle. The resilient element has an end fixed to the handle and another end extended to a position of connecting the handle and the blade. If the blade is stored in the handle, the resilient element produces a torque to turn the blade into the handle. When a force is applied to turn the blade out from the handle, the resilient element produces a torque to pop the blade out from the handle automatically. The poking element is provided for turning the blade. When the blade is in the handle, the poking element presses against the blade, such that if a user pokes an end of the poking element, another end of the poking element turns the blade out from the handle.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: September 20, 2011
    Inventor: Chih-Chen Kao
  • Publication number: 20110203115
    Abstract: A knife includes a handle and a blade coupled to the handle so as to be movable between an open position in which the blade extends from the handle, and a closed position, in which the blade is received within the handle. A detent mechanism is configured to resist movement of the blade from the closed position toward the open position while less than a threshold bias is applied to the blade toward the open position, but to release the blade to move toward the open position when at least the threshold bias is applied to the blade toward the open position. The threshold bias is of such a degree that, when the blade is released by the detent mechanism, sufficient energy is imparted by the bias to the blade to carry the blade from the closed position to the open position.
    Type: Application
    Filed: May 3, 2011
    Publication date: August 25, 2011
    Inventor: Kenneth J. Onion
  • Publication number: 20110099817
    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: Application
    Filed: January 11, 2011
    Publication date: May 5, 2011
    Applicant: Mentor Group, L.L.C.
    Inventor: Wes Duey
  • Patent number: 7886444
    Abstract: A foldable knife comprises a blade having an end pivotally connected to an end of a handle, and a spring having two ends connected to the handle and blade respectively, so that the spring can apply a torque to the blade to rotate the blade out of the handle. A blocking element is provided at an inner portion of the handle. A switch element pivotally connected to the inner portion of the handle has a first end extended out of the handle. When the blade is completely received in the handle, a second end of the switch element bears against the blade. When the user pushes the first end of the switch element, a positioning portion formed on the blocking element is disengaged from an engaging portion formed on the blade, so that the torque of the spring drives the blade to spring out of the handle.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: February 15, 2011
    Inventor: Chih-Chen Kao
  • Publication number: 20110010947
    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: Application
    Filed: July 14, 2009
    Publication date: January 20, 2011
    Inventor: Jeffrey Freeman
  • Patent number: 7854067
    Abstract: A folding knife has a slot disposed in the thickness of the tang with a roller cam extending outside of the perimeter of the tang and rotatably attached within the slot. A safety assembly disposed within the handle has a stud extending through a slot in the handle and moves the assembly between a safe and an unsafe position. In the safe position the safety assembly is forced against the tang thereby preventing opening. An adjustable bias element assists the blade in exiting the blade slot. The bias element is in spring communication with the roller cam. Applying pressure to the stud urges the blade from the closed position as the bias element is centered with the roller cam and the blade is forced to an open position by the spring force of the bias element on the roller cam.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: December 21, 2010
    Inventor: Ronald W. Lake
  • Patent number: 7827697
    Abstract: A low friction folding knife has a blade with a distal end and a tang. The tang has a slot disposed in the thickness of the tang with a roller cam extending slightly outside of the perimeter of the tang and rotatably attached within the slot. There is a safety assembly disposed within the first outer handle that has a safety stud extending through a safety slot in the first outer handle for moving the safety assembly between a safe position and a safe off position. There is an adjustable bias element disposed between the first liner and the second liner. The adjustable bias element is positioned to assist the blade in exiting the blade slot.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: November 9, 2010
    Inventor: Ronald W. Lake
  • Publication number: 20100257742
    Abstract: A folding knife has a slot disposed in the thickness of the tang with a roller cam extending outside of the perimeter of the tang and rotatably attached within the slot. A safety assembly disposed within the handle has a stud extending through a slot in the handle and moves the assembly between a safe and an unsafe position. In the safe position the safety assembly is forced against the tang thereby preventing opening. An adjustable bias element assists the blade in exiting the blade slot. The bias element is in spring communication with the roller cam. Applying pressure to the stud urges the blade from the closed position as the bias element is centered with the roller cam and the blade is forced to an open position by the spring force of the bias element on the roller cam.
    Type: Application
    Filed: June 18, 2010
    Publication date: October 14, 2010
    Inventor: Ronald W. Lake
  • Publication number: 20100236078
    Abstract: A folding knife incorporates an opening assist mechanism that functions to drive the blade from the closed to the open position. A pair of torsion springs held axially on the blade axis pin and within a pair of bushings are stationary relative to the knife handle. One leg of each spring is fixed to a bushing. The opposite leg of the spring rides in a pocket formed in the surface on the blade axially around the opening through which the blade axis pin is inserted. As the blade rotates from the closed position toward the open position, the legs of the springs rotate through and cooperate with structures formed on the bushings to transfer the spring pressure instantly to the blade to drive the blade open.
    Type: Application
    Filed: June 3, 2010
    Publication date: September 23, 2010
    Applicant: Mentor Group, L.L.C.
    Inventor: Wes Duey
  • Publication number: 20100212163
    Abstract: A leaf spring assisted opener for a folding tool such as a folding knife. The folding tool includes tool pivotally carried by a handle. The tool defines tang at the proximal end, and on which is carried a cam. A first liner defines a leaf spring for assisting in the opening of the tool. The leaf spring defines an elongated, arcuate configuration having a distal end adapted to engage the cam of the tool. The tang of the tool defines a shoulder strategically configured and positioned such that when the tool is in the closed position, the leaf spring engages a first side of the shoulder to bias the tool in the closed position. As the tool is pivoted from the closed position, the leaf spring eventually engages a second side of the shoulder and encourages the tool to its open orientation.
    Type: Application
    Filed: February 23, 2009
    Publication date: August 26, 2010
    Applicant: Ray International Enterprises Co., Ltd.
    Inventor: Zonghu LIU
  • Patent number: 7748122
    Abstract: A folding knife incorporates an opening assist mechanism that functions to drive the blade from the closed to the open position. A pair of torsion springs held axially on the blade axis pin and within a pair of bushings are stationary relative to the knife handle. One leg of each spring is fixed to a bushing. The opposite leg of the spring rides in a pocket formed in the surface on the blade axially around the opening through which the blade axis pin is inserted. As the blade rotates from the closed position toward the open position, the legs of the springs rotate through and cooperate with structures formed on the bushings to transfer the spring pressure instantly to the blade to drive the blade open.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: July 6, 2010
    Assignee: Mentor Group, L.L.C.
    Inventor: Wes Duey
  • Patent number: 7698821
    Abstract: The folding knife of the present invention includes a handle having first and second handle members that are maintained in spaced, parallel relation to one another by spacing elements that define a groove therebetween. The blade is pivotally attached to the handle at its tang portion and is movable into and out of the groove between its fully open and fully closed positions. A coil spring, or equivalent, may be interconnected between the tang and handle to provide an assisted opening mechanism. A blade lock includes a user actuated button that passes through an elongated slot formed through one of the handle members and through a circular opening formed through a bias plate that is positioned within the handle, and a plunger element that is spring biased in a direction transverse to the longitudinal axis of the blade.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: April 20, 2010
    Inventor: Darrel Ralph
  • Patent number: 7694421
    Abstract: A flick knife with a lever frame has a hilt, a blade, a lever frame and a spring. The blade has a proximal end pivotally mounted in the hilt. The lever frame is mounted through the hilt and has a front connector that abuts the proximal end of the blade to rotate the blade, and a rear connector. The spring is mounted inside the hilt and connects the hilt to the rear connector of the lever frame and eases opening of the blade and prevents the blade from opening. Because the spring is mounted in the hilt, the knife is thinner than prior art and therefore more convenient.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: April 13, 2010
    Inventor: Paul Lin
  • Patent number: 7676932
    Abstract: A knife with a spring-assisted articulation mechanism for assisting the user in the folding and unfolding of the blade from the pocket of the liner. The spring-assisted articulation mechanism also helps retain the blade in the folded position to prevent the blade from becoming unintentionally unfolded. The knife includes a pocketed liner and a blade attached to liner at one end of the liner by a pivot pin. The blade has a pointed end and a base end, the base end pivotally secured to the second end of the liner by the pivot pin such that the blade is capable of pivoting between a folded “closed” position and an unfolded “open” position. A guide pin is also attached to the blade of the knife at the base. A spring is provided to exert a closing force on the blade when the blade is in the closed position and an opening force on the blade when the user moves the blade into a partially open position.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: March 16, 2010
    Inventors: Jerry L. Grice, Tycelia Grice, legal representative