Patents Assigned to Truth Inc.
  • Self-locking window operator
    Patent number: 4617758
    Abstract: A self-locking window operator having one or more arms transmitting a force from a drive mechanism to a window sash for positioning thereof and with the arms mounted and driven for rotational movement in positioning of the window sash and also mounted and driven for linear movement when the window sash is closed to achieve a locking action between the window sash and the window frame by engaging a locking mechanism which locks the window against high window-opening loads.
    Type: Grant
    Filed: January 23, 1984
    Date of Patent: October 21, 1986
    Assignee: Truth Inc.
    Inventor: Gregory J. Vetter