Patents by Inventor Charles H Sisk

Charles H Sisk 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).

  • Patent number: 9726444
    Abstract: An improved tactical adaptive rifle stock is taught which includes a multi-axis adjustable buttstock, and a fore-end consisting of a receiver portion and a forestock, together forming a combined set, which is attached to a flanged stock bolt of the buttstock. The receiver portion includes a cavity forming a receiver bedding interface surface precluding peripheral interference. The receiver portion has a recoil lug pocket with threaded fasteners engaging a rifle action recoil lug. A locking wedge is positioned in a recess of the receiver portion and dovetail grooves are included in a forward end. The forestock incorporates dovetail grooves that mate with the receiver portion grooves when secured with a wedge and wedge threaded fastener. The buttstock, receiver portion and forestock have lightening areas for reducing overall weight. A second embodiment utilizes an adapter, a connector and an AR-15 style handguard or a suppressor, replacing the forestock and a third embodiment employs a one piece fore-end.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: August 8, 2017
    Inventor: Charles H. Sisk
  • Patent number: 9574840
    Abstract: A mount is taught which incorporates a Picatinny rail and a handguard interface. The mount has an offset L-shape which includes an integral Picatinny rail portion for accessory mounting and an integral threaded handguard adapter portion that attaches to an existing firearm handguard. The mount has a body with the handguard adapter portion protruding outwardly on a front side, a body vertical leg and the Picatinny rail formed integrally on the bottom of a body horizontal leg. The handguard adapter has a hollow inside diameter adapted to conform to a handguard interface surface and a lockring is provided for manual adjustment of the handguard. A second embodiment omits the legs and incorporates an offset shape.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: February 21, 2017
    Inventor: Charles H. Sisk
  • Patent number: 8720099
    Abstract: A multi-axis adjustable buttstock is taught that incorporates a buttstock, having, a grip neck, and a butt along with an interfaced set of two serrated grip retainers attached onto the buttstock grip neck, for buttstock tilt adjustment. A plurality of selectable flat and tapered grip spacers engage the grip serrated retainers for trigger grip length, cast and drop adjustment of the buttstock. A flanged stock bolt is disposed through a portion of the buttstock retaining the spacers and grip retainers while being embraced tightly by a first lock ring. A threaded rod is inserted into the buttstock a desired distance for length of pull adjustment and a second threaded lock ring is positioned on the threaded rod for securement. A recoil pad adapter plate, having a plurality of concentric holes, is attached to the threaded rod, for recoil pad slant adjustment, and a recoil pad is attached to the adapter plate aligned with selected recoil pad holes for recoil pad height and angle adjustments.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: May 13, 2014
    Inventor: Charles H. Sisk
  • Patent number: 8230633
    Abstract: A set of multiple recoil lugs for a rifle is taught, consisting of a rifle barrel with receiver end and a muzzle end. The receiver end of the barrel having a cartridge chamber therein and receiver threads with an extended chamber portion over the cartridge chamber and at least one set of forward lug attaching threads located between the receiver end and the muzzle end. A threaded receiver recoil lug jointly engages a rifle receiver on the receiver threads which forms a recoil absorbing surface with a rifle stock. One or more forward recoil lugs are mated with the forward lug attaching threads, forming additional recoil absorbing surfaces with the rifle stock. A barrel lock nut is attached to each set of forward lug attaching threads engaging each forward recoil lug, firmly locking each forward recoil lug securely in place. An alternate embodiment is used when the rifle receiver incorporates an integral recoil lug thereby eliminating the necessity of the receiver recoil lug.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: July 31, 2012
    Inventor: Charles H. Sisk
  • Patent number: D533615
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: December 12, 2006
    Inventors: Charles H Sisk, Richard A Mann, II
  • Patent number: D737921
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: September 1, 2015
    Inventor: Charles H. Sisk