Patents by Inventor Laude E. Hartrum

Laude E. Hartrum 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: 5335986
    Abstract: An interlock assembly (20) for two or more horizontally sliding drawers (11, 13) in a cabinet (10) to prevent opening more than one drawer at a time is described. The interlock assembly is characterized by each drawer having rotating cam members (21, 23) with lobes (21A, 23A) and valleys (21B, 23B) which mate with blocks (25, 27, 29, 31) having corresponding lobes (25A, 27A, 29A, 31A) and valleys (25C, 27C, 29C, 31C). When a first cam member (23) is rotated by opening a drawer (13) the lobes (23A) of the cam member (23) engage lobes (29A, 31A) of the corresponding blocks (29, 31) to move the blocks (25, 27, 29, 31 ) and cam member (23) towards the cabinet (10) to provide the interlock for the drawers so that the other drawer (11) can not be opened.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: August 9, 1994
    Assignee: Metalworks, Inc.
    Inventors: Laude E. Hartrum, Raymond J. Smuda
  • Patent number: 4732434
    Abstract: An interlock assembly (20) for two or more horizontally sliding drawers (11, 12) in a cabinet (10) to prevent opening more than one drawer at a time is described. The interlock assembly is characterized by each drawer having rotating cam members (22, 23) with lobes (23a and 23b) and valleys (23c and 23d) which mate with corresponding lobes (26a, 27a) and valleys (26c, 27c) in blocks (26 and 27). When the cam member (23) is rotated the lobes (23a, 23b) and (23c and 23d) engage lobes (26a and 27a) of the blocks (26 and 27) to move the blocks and cam members as a train so as to engage the cabinet (10) to provide the interlock of the drawers.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: March 22, 1988
    Assignee: Metalworks, Inc.
    Inventor: Laude E. Hartrum