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: 20230278247
    Abstract: 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: Application
    Filed: March 7, 2022
    Publication date: September 7, 2023
    Inventor: Andrew Demko
  • Patent number: 11612995
    Abstract: 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: Grant
    Filed: February 23, 2020
    Date of Patent: March 28, 2023
    Assignee: GOOD SPORTSMAN MARKETING, LLC
    Inventor: Andrew Demko
  • Patent number: 11465300
    Abstract: 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: Grant
    Filed: November 27, 2019
    Date of Patent: October 11, 2022
    Assignee: GOOD SPORTSMAN MARKETING, L.L.C.
    Inventor: Andrew Demko
  • Patent number: 11305440
    Abstract: 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: Grant
    Filed: February 23, 2020
    Date of Patent: April 19, 2022
    Assignee: GOOD SPORTSMAN MARKETING, LLC
    Inventor: Andrew Demko
  • Publication number: 20210197411
    Abstract: 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: Application
    Filed: February 23, 2020
    Publication date: July 1, 2021
    Inventor: Andrew Demko
  • Publication number: 20210197359
    Abstract: 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: Application
    Filed: February 23, 2020
    Publication date: July 1, 2021
    Inventor: Andrew Demko
  • Patent number: 11020863
    Abstract: 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: Grant
    Filed: May 4, 2020
    Date of Patent: June 1, 2021
    Inventor: Andrew Demko
  • Publication number: 20210154867
    Abstract: 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: Application
    Filed: November 27, 2019
    Publication date: May 27, 2021
    Inventor: Andrew Demko
  • Patent number: 10870209
    Abstract: 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: Grant
    Filed: January 18, 2019
    Date of Patent: December 22, 2020
    Assignee: COLD STEEL, INC.
    Inventors: Andrew Demko, Mike Wallace
  • Publication number: 20200230831
    Abstract: 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: Application
    Filed: January 18, 2019
    Publication date: July 23, 2020
    Applicant: Cold Steel, Inc.
    Inventors: Andrew Demko, Mike Wallace
  • Publication number: 20200230830
    Abstract: 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: Application
    Filed: January 18, 2019
    Publication date: July 23, 2020
    Applicant: Cold Steel, Inc.
    Inventors: Andrew Demko, Mike Wallace
  • Patent number: 10632632
    Abstract: 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: Grant
    Filed: March 18, 2019
    Date of Patent: April 28, 2020
    Inventor: Andrew Demko
  • Patent number: 9950433
    Abstract: 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: Grant
    Filed: March 27, 2015
    Date of Patent: April 24, 2018
    Inventor: Andrew Demko
  • Publication number: 20160279810
    Abstract: 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: Application
    Filed: March 27, 2015
    Publication date: September 29, 2016
    Inventor: Andrew Demko
  • Publication number: 20150266188
    Abstract: 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: Application
    Filed: June 4, 2015
    Publication date: September 24, 2015
    Inventor: Andrew Demko
  • Patent number: 8196788
    Abstract: 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: Grant
    Filed: May 26, 2010
    Date of Patent: June 12, 2012
    Assignee: Cold Steel
    Inventors: Andrew Demko, Michael Travis Wallace
  • Patent number: 8123637
    Abstract: 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: Grant
    Filed: February 22, 2010
    Date of Patent: February 28, 2012
    Assignee: Cold Steel
    Inventors: Andrew Demko, Michael T. Wallace
  • Patent number: 8096292
    Abstract: 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: Grant
    Filed: March 24, 2010
    Date of Patent: January 17, 2012
    Assignee: Cold Steel
    Inventors: Andrew Demko, Michael T. Wallace
  • 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
  • Patent number: D816457
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: May 1, 2018
    Assignee: COLD STEEL
    Inventor: Andrew Demko