Patents by Inventor George L. Engstrom

George L. Engstrom 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: 4588221
    Abstract: The subject of this patent application is a door assembly (10) having a knob (38) which, during shipment, is segregated from the rest of the assembly (10) for ease in packaging and storage. The invention includes a unique locking element (62) for securing the knob (38) to the door closure panel (12) when the panel (12) is at a location at which it is to be installed.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: May 13, 1986
    Assignee: Ideal Security Hardware Corporation
    Inventors: Cardell E. Miller, Gene A. Tracy, George L. Engstrom, John Thorson
  • Patent number: 4570985
    Abstract: A locking bar (3) for use with a slideable panel (9), for example, sliding glass patio doors. The bar (3) includes first and second telescoping members (14 and 15) and a locking mechanism (16) at the point of attachment of the two members. The first member (14) is fixed against movement toward and away from the second member (15). The second member (15) is capable of telescoping movement relative to the first member (14). The locking bar further includes a bracket (19) for holding the second member (15) against movement relative to the slideable panel (9).
    Type: Grant
    Filed: April 23, 1982
    Date of Patent: February 18, 1986
    Assignee: Ideal Security Hardward Corporation
    Inventors: Russell W. Waldo, Cardell E. Miller, Louis D. Huot, George L. Engstrom
  • Patent number: 4332407
    Abstract: An automatically locking crossbolt deadlock (2). Deadlock (2) includes a vertically movable crossbolt (36) which may be moved between locked and unlocked positions. A lock button (200) is movable between a first position in which the lock button (200) positively holds crossbolt (36) in its locked position and a second position in which crossbolt (36) is free to move. A drive lever (43) is provided for moving crossbolt (36) between its locked and unlocked positions. Lock button (200) is moved from its first to its second position upon rotation of a handle (130) so that a panic exit may be accomplished without manually unlocking lock button (200). In addition, lock button (200) is movable to a third position for holding crossbolt (36) in its unlocked position to provide an anti-lock out feature. Rotatable handle (130) includes a lock cylinder (63) therein.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: June 1, 1982
    Assignee: Ideal Security Hardware Corporation
    Inventors: Russell W. Waldo, George L. Engstrom