Patents by Inventor Andrew Demko
Andrew Demko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20230278247Abstract: A knife sheath assembly having a knife blade receiving opening chamber with a knife handle engagement stopper. A pair of rigid sheath shells are secured together by edge shell engagement fittings. Each sheath shell defines a contoured recess knife receiving portion that encloses the knife blade when assembled. The sheath shells are formed of non-abrasive synthetic material to safely engage and hold the knife blade without insertion or retrieval damage thereto.Type: ApplicationFiled: March 7, 2022Publication date: September 7, 2023Inventor: Andrew Demko
-
Patent number: 11612995Abstract: An axe head is attached to a handle in a manner that utilizes the inertia of the axe head to bear against a structure that resists separation of the axe head from the handle. In one example, that structure is a key that fits within the handle after the axe head is slid onto the handle, resisting passage of the axe head past the key. In another example, at least one end piece is joined to a narrowed, toothed section of the handle, forming an assembly with a friction fitted portion and an end portion with a diameter that exceeds the diameter of the hole in the axe head, retaining the axe head on the friction fitted portion of the handle assembly.Type: GrantFiled: February 23, 2020Date of Patent: March 28, 2023Assignee: GOOD SPORTSMAN MARKETING, LLCInventor: Andrew Demko
-
Patent number: 11465300Abstract: A Balisong knife includes a latch that resists compression of the back end of the handles towards each other under grip pressure by the user, thus increasing the columns strength of the handles when the knife is in a latched open configuration. A crossmember is provided adjacent to the latch pivot, resisting movement of the latch into any position wherein interference between the latch and tip of the blade could occur. Integral, friction reducing surfaces are provided on components of the knife. The knife can be assembled using snap fit pivot pins. The blade includes portions of varying thickness, providing additional thickness in the region of the points for greater strength, while allowing center edges for more effective cutting.Type: GrantFiled: November 27, 2019Date of Patent: October 11, 2022Assignee: GOOD SPORTSMAN MARKETING, L.L.C.Inventor: Andrew Demko
-
Patent number: 11305440Abstract: A knife includes interchangeable blades that are secured within the handle using a locking mechanism having a lock pin disposed between the distal end of the lock bar and the blade. In addition to strengthening the lock, the lock pin also serves as a safety catch n the unlikely event of lock failure, resisting rotation of the blade into a position in which the user's fingers would be cut.Type: GrantFiled: February 23, 2020Date of Patent: April 19, 2022Assignee: GOOD SPORTSMAN MARKETING, LLCInventor: Andrew Demko
-
Publication number: 20210197359Abstract: An axe head is attached to a handle in a manner that utilizes the inertia of the axe head to bear against a structure that resists separation of the axe head from the handle. In one example, that structure is a key that fits within the handle after the axe head is slid onto the handle, resisting passage of the axe head past the key. In another example, at least one end piece is joined to a narrowed, toothed section of the handle, forming an assembly with a friction fitted portion and an end portion with a diameter that exceeds the diameter of the hole in the axe head, retaining the axe head on the friction fitted portion of the handle assembly.Type: ApplicationFiled: February 23, 2020Publication date: July 1, 2021Inventor: Andrew Demko
-
Publication number: 20210197411Abstract: A knife includes interchangeable blades that are secured within the handle using a locking mechanism having a lock pin disposed between the distal end of the lock bar and the blade. In addition to strengthening the lock, the lock pin also serves as a safety catch n the unlikely event of lock failure, resisting rotation of the blade into a position in which the user's fingers would be cut.Type: ApplicationFiled: February 23, 2020Publication date: July 1, 2021Inventor: Andrew Demko
-
Patent number: 11020863Abstract: A folding knife having an improved locking mechanism that keeps the knife in open extended use position until specific close actions are initiated. The improved locking mechanism provides a safety pin that is secured within the frame element so as to be positioned between the knife blade and the free end of the locking bar that is spring urged there against imparting movement force transfer locking structure thereto with wear adjustable pivot engagement points of locking mechanism under spring urged locking engagement.Type: GrantFiled: May 4, 2020Date of Patent: June 1, 2021Inventor: Andrew Demko
-
Publication number: 20210154867Abstract: A Balisong knife includes a latch that resists compression of the back end of the handles towards each other under grip pressure by the user, thus increasing the columns strength of the handles when the knife is in a latched open configuration. A crossmember is provided adjacent to the latch pivot, resisting movement of the latch into any position wherein interference between the latch and tip of the blade could occur. Integral, friction reducing surfaces are provided on components of the knife. The knife can be assembled using snap fit pivot pins. The blade includes portions of varying thickness, providing additional thickness in the region of the points for greater strength, while allowing center edges for more effective cutting.Type: ApplicationFiled: November 27, 2019Publication date: May 27, 2021Inventor: Andrew Demko
-
Patent number: 10870209Abstract: A folding knife has an elongated blade having a pivot end and an opposed free end, the pivot end of the blade pivotally connected to a handle, the blade being movable between a closed position in which the blade is protectively received by the handle and an open position in which the blade extends away from the handle, a back lock element pivotally connected to the handle and having a block portion, the back lock element movable between a locked position in which the block portion operably contacts a portion of the pivot end of the blade to prevent movement of the blade from the open position to the closed position, and an unlocked position in which movement of the blade from the open position to the closed position is enabled, and a safety element movable between an engaged position and a disengaged position.Type: GrantFiled: January 18, 2019Date of Patent: December 22, 2020Assignee: COLD STEEL, INC.Inventors: Andrew Demko, Mike Wallace
-
Publication number: 20200230830Abstract: A folding knife has an elongated blade having a pivot end and an opposed free end, the pivot end of the blade pivotally connected to a handle, the blade being movable between a closed position in which the blade is protectively received by the handle and an open position in which the blade extends away from the handle, a back lock element pivotally connected to the handle and having a block portion, the back lock element movable between a locked position in which the block portion operably contacts a portion of the pivot end of the blade to prevent movement of the blade from the open position to the closed position, and an unlocked position in which movement of the blade from the open position to the closed position is enabled, and a safety element movable between an engaged position and a disengaged position.Type: ApplicationFiled: January 18, 2019Publication date: July 23, 2020Applicant: Cold Steel, Inc.Inventors: Andrew Demko, Mike Wallace
-
Publication number: 20200230831Abstract: A folding knife has an elongated blade having a pivot end and an opposed free end, the pivot end of the blade pivotally connected to a handle, the blade being movable between a closed position in which the blade is protectively received by the handle and an open position in which the blade extends away from the handle, a liner lock element connected to the handle and having a block portion, the liner lock element movable between a locked position in which the block portion operably contacts a portion of the pivot end of the blade to prevent movement of the blade from the open position to the closed position, and an unlocked position in which movement of the blade from the open position to the closed position is enabled, and a safety element movable between an engaged position and a disengaged position.Type: ApplicationFiled: January 18, 2019Publication date: July 23, 2020Applicant: Cold Steel, Inc.Inventors: Andrew Demko, Mike Wallace
-
Patent number: 10632632Abstract: A folding knife having a blade pivoted from a closed position to an open locked position with a combined self-activating sliding release and locking arm. The sliding locking arm is mounted within the knife handle on dual fixed guide and pivot pins within respective arm openings being spring urged there against. Arm projections are engaged by the blade shank during operation moving the locking arm back and up then releasing to slide forward locking the blade in open use position until manual arm engagement by the user against the spring for release and transitional closure.Type: GrantFiled: March 18, 2019Date of Patent: April 28, 2020Inventor: Andrew Demko
-
Patent number: 9950433Abstract: A folding knife having an improved locking engagement mechanism that will maintain and hold the knife in an open locked use position or in a locked folded position. The improved locking engagement provides a spring urged dual locking bar engaged directly on the knife blade for an improved imparted force transfer. A positional locking activation safety button is resiliently registerably against an apertured pivot arm extension of the locking bar for locking and unlocking engagement.Type: GrantFiled: March 27, 2015Date of Patent: April 24, 2018Inventor: Andrew Demko
-
Publication number: 20160279810Abstract: A folding knife having an improved locking engagement mechanism that will maintain and hold the knife in an open locked use position or in a locked folded position. The improved locking engagement provides a spring urged dual locking bar engaged directly on the knife blade for an improved imparted force transfer. A positional locking activation safety button is resiliently registerably against an apertured pivot arm extension of the locking bar for locking and unlocking engagement.Type: ApplicationFiled: March 27, 2015Publication date: September 29, 2016Inventor: Andrew Demko
-
Publication number: 20150266188Abstract: A folding knife incorporating an opening assist mechanism that enables the blade from a closed to open position by providing a spring for selective initial blade engagement. A single integral bifurcated spring acts to continuously engage a spring urge locking bar retaining the blade in open locked position and to provide initial spring urged deployment of the blade from blade closed position to blade locked open position during user initiated deployment.Type: ApplicationFiled: June 4, 2015Publication date: September 24, 2015Inventor: Andrew Demko
-
Patent number: 8196788Abstract: A scabbard for axes or tomahawks that provides a lightweight and foldable integrated head cover configuration that encloses the respective sharpened surfaces of the weapon in multiple pivoted hard case covers for safety and transport on the person of the user.Type: GrantFiled: May 26, 2010Date of Patent: June 12, 2012Assignee: Cold SteelInventors: Andrew Demko, Michael Travis Wallace
-
Patent number: 8123637Abstract: A stun dart having a solid impact head with a conical shaped tail portion interconnected by a solid cylindrical elongated body. The impact head has a contoured front surface with intersecting grooves and a tapered trailing body surface to impart flight stability and maximum travel distance and impact delivery to the target.Type: GrantFiled: February 22, 2010Date of Patent: February 28, 2012Assignee: Cold SteelInventors: Andrew Demko, Michael T. Wallace
-
Patent number: 8096292Abstract: A multi-dart blow gun projectile holder that provides for insertion and launching of multiple blow gun darts from a blow gun. The projectile holder has dual hollow open engagement cones secured together in oppositely disposed relation to one another. Multiple wire darts are selectively positioned by their base in one of said cones while the remaining cone imparts an air seal within the blow gun under user applied air pressure propelling and holding the position darts as they travel out of the blow gun during use.Type: GrantFiled: March 24, 2010Date of Patent: January 17, 2012Assignee: Cold SteelInventors: Andrew Demko, Michael T. Wallace
-
Patent number: RE43908Abstract: 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: GrantFiled: November 1, 2010Date of Patent: January 8, 2013Assignee: Cold SteelInventor: Andrew Demko
-
Patent number: D816457Type: GrantFiled: January 6, 2017Date of Patent: May 1, 2018Assignee: COLD STEELInventor: Andrew Demko