Patents by Inventor John C. Zahniser

John C. Zahniser 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 steering system with input horsepower limiting circuit and increased fan speeds at low engine RPM
    Patent number: 7360357
    Abstract: A hydraulic system that provides hydraulic fluid to a power steering system of a vehicle at a substantially constant flow rate and can also divert excess hydraulic fluid to the air cooling fan of an associated vehicle at low engine speeds is disclosed. The resulting hydraulic system increases fan speed and increases cooling at low engine speeds while also limiting the input horsepower to one or more driving pumps based at least in part on the outlet pressure of the hydraulic pump unit.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: April 22, 2008
    Assignee: Parker-Hannifin Corporation
    Inventor: John C. Zahniser