Power steering system

Details Power steering system Power steering system

2007-01-02

2007-01-02

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

Apparatus having means responsive to or ameliorating the...

C060S468000

Reexamination Certificate

active

11073525

ABSTRACT:
In a hydraulic power steering system employing a power cylinder accommodating therein a piston connected to a steering mechanism for steering assistance, and having first and second hydraulic chambers defined on both sides of the piston, hydraulic pressure is supplied through first and second fluid lines to the respective hydraulic chambers. A communicating circuit is provided to intercommunicate the first and second fluid lines therevia. A directional control valve, disposed in the communicating circuit, has a poppet valve mechanism, which is switched to a valve-open position in presence of a hydraulic power steering system failure, to intercommunicate the first and second fluid lines with the poppet valve mechanism opened.

REFERENCES:
patent: 6152254 (2000-11-01), Phillips
patent: 6283243 (2001-09-01), Bohner et al.
patent: 6513620 (2003-02-01), Igawa et al.
patent: 6647721 (2003-11-01), Heyne et al.
patent: 2002-145087 (2002-05-01), None
patent: 2002145087 (2002-05-01), None

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