Patents by Inventor James Jay Kempf

James Jay Kempf 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: 9097487
    Abstract: The spring suppressor preferably includes a housing, a piston rod, a compression spring and an end plug. The piston includes a bumper portion, a neck portion and a tail portion. The housing includes a bumper hole, a piston bore and a cap thread. The piston bore is formed through substantially a length of the housing. The bumper hole is sized to slidably receive an outer diameter of the bumper portion. The cap thread is formed in an entrance of the piston bore to threadably receive the end plug. The piston is pre-loaded by the compression spring. The end plug is threaded into an end of the piston bore to retain the compression spring and the piston rod. A second embodiment of the string suppressor preferably includes the bumper, the piston rod, the compression spring, a housing and an end rod.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: August 4, 2015
    Inventor: James Jay Kempf
  • Publication number: 20150013657
    Abstract: The spring suppressor preferably includes a housing, a piston rod, a compression spring and an end plug. The piston includes a bumper portion, a neck portion and a tail portion. The housing includes a bumper hole, a piston bore and a cap thread. The piston bore is formed through substantially a length of the housing. The bumper hole is sized to slidably receive an outer diameter of the bumper portion. The cap thread is formed in an entrance of the piston bore to threadably receive the end plug. The piston is pre-loaded by the compression spring. The end plug is threaded into an end of the piston bore to retain the compression spring and the piston rod. A second embodiment of the string suppressor preferably includes the bumper, the piston rod, the compression spring, a housing and an end rod.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 15, 2015
    Inventor: James Jay Kempf
  • Patent number: 8720424
    Abstract: The present invention pertains to the field of archery devices, specifically to devices known as crossbows. Historically. crossbows have had a single foot stirrup, centered at the front end of the crossbow, to assist the user in the cocking procedure. Though functional, a single stirrup does not allow the user to naturally center the crossbow with his body while cocking the crossbow, which may cause miss-alignment of the bow string, as well as possible loss of balance and fatigue. By placing a stirrup on both sides of the barrel of the crossbow, the user may use his left foot, right foot, or both feet to cock the crossbow, and the crossbow is automatically centered to the users body.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: May 13, 2014
    Inventor: James Jay Kempf
  • Publication number: 20130061836
    Abstract: The present invention pertains to the field of archery devices, specifically to devices known as crossbows. Historically. crossbows have had a single foot stirrup, centered at the front end of the crossbow, to assist the user in the cocking procedure. Though functional, a single stirrup does not allow the user to naturally center the crossbow with his body while cocking the crossbow, which may cause miss-alignment of the bow string, as well as possible loss of balance and fatigue. By placing a stirrup on both sides of the barrel of the crossbow, the user may use his left foot, right foot, or both feet to cock the crossbow, and the crossbow is automatically centered to the users body.
    Type: Application
    Filed: July 27, 2011
    Publication date: March 14, 2013
    Inventor: James Jay Kempf
  • Publication number: 20120125306
    Abstract: A quiver for holding arrows is one-hand releasably attachable to an archery bow. A quiver attachment bracket having opposing grooves is mountable to the bow. The quiver has two parallel elongated struts supporting an arrowhead hood and at least one arrow shaft holder. A clamp is mounted to and between the struts having biased first and second jaws extending transversely of the quiver with each jaw having an adjacent one-hand grippable handle extending transversely of the quiver opposite of the jaws. The biased jaws each have a tongue that is lockable into one of the grooves.
    Type: Application
    Filed: November 22, 2010
    Publication date: May 24, 2012
    Inventor: James Jay Kempf