Patents by Inventor John Heinsohn

John Heinsohn 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: 8006423
    Abstract: An improved magazine follower for use in existing magazines such as a 30 round magazine comprises a follower plate, a base plate, and a spring. The follower plate comprises a top plate, a convex follower leg, and a concave follower leg. The external shapes of the top plate, the convex follower leg, and the concave follower leg mirror the interior profile of the magazine, constraining the motion of the follower plate to a well-defined path within the magazine. The method of attaching the spring to the follower plate and the base plate in addition to the shape of the spring keeps the spring from “wobbling” or moving off a vertical axis of the spring as rounds of ammunition are loaded or dispensed. Consequently, the present system reduces binding or jams within the magazine, improving performance and life of the magazine follower.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: August 30, 2011
    Assignee: The Unites States of America as represented by the Secretary of the Army
    Inventors: Ronny Alzamora, John Heinsohn, Adam Foltz
  • Patent number: 7533483
    Abstract: An improved magazine for use in existing firearms comprises a housing, a follower, a spring, a spring hold and a cap. The housing comprises protruded surfaces for structural strength and a projection that acts as a stop member to define the maximum insertion of the magazine into the firearm magazine well. The follower comprises two follower legs and a spring retainer, and travels up and down the housing. The perimeters of the follower and follower legs mirror the internal profile of the magazine housing for a well-defined travel path within the magazine housing. The spring hold comprises a spring retainer and a round protrusion that locks it into the cap via a circular cut. The cap comprises flanges that slide into the slots against the end stop at the bottom of the housing.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: May 19, 2009
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ronny Alzamora, John Heinsohn, Adam Foltz
  • Patent number: 7478495
    Abstract: A weapon includes a receiver having a bolt carrier assembly therein; a buttstock disposed behind the receiver, the buttstock having a tubular opening adjacent an end of the bolt carrier assembly; a larger diameter spring disposed in the tubular opening; a smaller diameter spring disposed in the larger diameter spring; a rod disposed in the rear end of the smaller diameter spring; a bumper attached to the rod; and a cap disposed in the front end of the spring, the cap having a head wherein a front side of the head engages the end of the bolt carrier assembly and a front end of the larger diameter spring bears against a rear side of the head.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: January 20, 2009
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ronny Alzamora, John Heinsohn, Brian Donovan, Kevin Russell, Adam Foltz