Patents by Inventor William H. Cliff

William H. Cliff 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: 6038898
    Abstract: An axial pin tumbler lock and key assembly comprise a housing with an axial pin tumbler barrel fixed within the housing and including passages for storage of key change tumblers. A rotatable forward barrel and spindle include axial pin tumblers movable in response to the insertion of an appropriate key of the type having a hollow cylindrical barrel for engagement with the tumblers. The key includes detents on the inside surface of the cylindrical barrel and radial ribs on the outside surface thereof for actuation of the front barrel.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: March 21, 2000
    Assignee: Compx International, Inc.
    Inventor: William H. Cliff
  • Patent number: 5979200
    Abstract: A removable core, axial pin tumbler lock includes an inner cylinder assembly which is retained within a housing for the lock by means of a spring biased disc which may be decoupled from the housing by means of insertion of a pick through a passageway defined in the inner cylinder assembly when the components parts of the assembly are appropriately aligned.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: November 9, 1999
    Assignee: Compx International, Inc.
    Inventor: William H. Cliff
  • Patent number: 5678438
    Abstract: A cabinet lock is disclosed which is easily convertible between a drawer lock and a door lock, by rotating the lock cylinder 90 degrees within the lock body. The cabinet lock includes a lock body with a mounting plate and an extending sleeve that defines a central opening. A portion of the sleeve is indented inward to form a two-sided right angle notch that projects into the internal cavity of the sleeve, with an aperture through each side of the notch. The lock cylinder has first and second notch mating sections, rotated 90 degrees from one another about the cylinder, each having a threaded bore therein. The lock cylinder can be inserted into the sleeve in a first position, or in a second position rotated 90 degrees from the first position, and fixed in place with a screw that passes through one of the bores and one of the apertures. A lock plug with a bolt driving mechanism is adapted to fit within a longitudinal opening in the lock cylinder, and a bolt is operatively attached to the bolt driving mechanism.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 21, 1997
    Inventors: Donald J. Kolkman, William H. Cliff