Auxiliary force steering device for a vehicle

Details Auxiliary force steering device for a vehicle Auxiliary force steering device for a vehicle

2011-07-26

2011-07-26

Lazo, Thomas E (Department: 3745)

Motors: expansible chamber type

Working member position responsive motive fluid control

Bypassing between expanding chamber and closed or throttled...

C091S402000, C091S404000, C091S409000

Reexamination Certificate

active

07984669

ABSTRACT:
A power steering device for a vehicle which is disposed in the transmission path between a steering handle and a steerable vehicle wheel, comprises a servo cylinder having two pressure chambers, which are separated by a working piston and are each connected to a pressure supply unit. A valve plunger, which seals a bypass channel between the pressure chambers, is movably disposed on the working piston. Furthermore, an adjustment bushing comprising an adjustment section is disposed in the servo cylinder, the valve plunger being moved against this section upon approaching an axial limit position, thereby opening the bypass channel. The adjustment bushing is clamped into the servo cylinder, yet held displaceably, wherein, on the adjustment bushing, a sealing section is provided, which is to be moved into a sealing position with the working piston so as to interrupt the flow connection between the pressure chambers.

REFERENCES:
patent: 6161465 (2000-12-01), Hafermalz
patent: 6318232 (2001-11-01), Lemke et al.
patent: 4435848 (1996-04-01), None
patent: 0 937 206 (1999-08-01), None
patent: 1 052 159 (2000-11-01), None
patent: 8-183469 (1996-07-01), None

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