Patents by Inventor Albert C. Zwicky

Albert C. Zwicky 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).

  • Hydraulic cab tilting system having full locking with controlled free-fall
    Patent number: 4410056
    Abstract: An hydraulic tilt system and method for its use with a cab pivotally mounted on a motor vehicle frame. An hydraulic piston-cylinder assembly pivotally connects between the cab and the frame. A remote control station has an hydraulic pump, a reservoir, and a control for operating the pump to tilt the cab. Hydraulic lines connect the control station with the piston-cylinder assembly. Check valves in the hydraulic lines stop the tilting motion of the cab in case of loss of hydraulic pressure. A controlled return free-fall valve is also disposed in the hydraulic lines to selectively restrict the flow of hydraulic fluid.
    Type: Grant
    Filed: May 27, 1981
    Date of Patent: October 18, 1983
    Assignee: PACCAR Inc.
    Inventors: Virgil E. Pound, James R. Jensen, Albert C. Zwicky