Patents by Inventor Walter H. Chapman

Walter H. Chapman 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).

  • Bumper assisted for cart accumulator
    Patent number: 4246847
    Abstract: An apparatus for transmitting force between a wheeled cart and an in-floor conveyor chain that includes a pin mounted on the cart which pivots out of engagement with the chain when a predetermined thrust is exceeded. A bumper connected to the pin via a resilient link assists the pin in retracting from engagement with the chain when the bumper strikes an obstacle in the path of the cart.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: January 27, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Walter H. Chapman, David E. Hiland, Erwin B. Knies
  • Apparatus for connecting tow carts to a conveyor
    Patent number: 4211172
    Abstract: An apparatus for transmitting force between a tow cart and an in-floor conveyor that includes a pin that pivots out of engagement with the conveyor when the cart meets an obstruction. The motion of the pin when disengaging from the conveyor places another pin in position to engage another drawing position of the conveyor. The pins are movable along their longitudinal axes to follow the profile of the conveyor when moving into and out of engagement with it.
    Type: Grant
    Filed: March 31, 1978
    Date of Patent: July 8, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Walter H. Chapman, David E. Hiland, Erwin B. Knies, Robert E. Oberlin