Title: Hydraulic steering limit control

Abstract: In an auxiliary power steering system, a steering linkage actuated limit valve assembly is maintained depressurized in its inactive state by one-way check valves blocking flow from the pressurized chambers of the steering servomotor and by by-pass valves which control the connection of the differential pressure operated valve to the vented chambers of the servomotor.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Karcher, Karl-Friedrich (Lorch, DE, US)
Merkle, Otto (Schwabisch Gmund, DE, US)

Application Number: 968413
Filing Date: 1978-12-11
Publication_date: 1980-02-19
Assignee: Zahnradfabrik Friedrichshafen AG (Friedrichshafen, DE)
Primary Class(es): 180/442 91/400, 91/451
Other Classes:
US Patent Ref:

3878763	Apr, 1975	Lang	180/139.
3945457	Mar, 1976	Olsen	91/400.
3968733	Jul, 1976	Lang	91/451.
4006662	Feb, 1977	Olsen	91/451.

Other Refs:
Primary Examiner: Peters, Jr., Joseph F.
Assistant Examiner: McGiehan, Donn
Attorney: Zalkind & Shuster