Patents by Inventor David Schweninger

David Schweninger 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).

  • Turn wheel locking device
    Patent number: 6161849
    Abstract: A turn wheel locking device for use with shopping carts having at least one turn wheel. The locking device functions to automatically disable the cart when it is removed from a prescribed area by locking the turn wheel in a turned configuration so that the cart can travel only along a generally circular path.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: December 19, 2000
    Inventor: Q. David Schweninger
  • Turn wheel locking device
    Patent number: 6102414
    Abstract: A turn wheel locking device for use with shopping carts having at least one turn wheel. The locking device functions to automatically disable the cart when it is removed from a prescribed area by locking the turn wheel in a turned configuration so that the cart can travel only along a generally circular path.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: August 15, 2000
    Inventor: David Schweninger
  • Toggle brake assembly for a wheel of a shopping cart or the like
    Patent number: 5823302
    Abstract: For a shopping cart wheel, for example, a toggle brake assembly which can be automatically actuated by an audio frequency signal when the cart is taken out of a designated area. When actuated, a battery-powered solenoid coil of the brake assembly is energized, drawing a coil spring catch away from a locking position on a toggle. The toggle then drops with a pivotal or axial movement to a braking position against the wheel, either against the outside or inside of the wheel depending on the brake embodiment used. As the wheel rotates in either direction, the toggle wedges or hooks to brake the wheel.
    Type: Grant
    Filed: May 23, 1996
    Date of Patent: October 20, 1998
    Inventor: Quentin David Schweninger