Power steering system

Details Power steering system Power steering system

2007-02-13

2007-02-13

Morris, Lesley D. (Department: 3611)

Motor vehicles

Steering gear

With fluid power assist

C180S439000, C180S441000, C180S417000, C060S473000, C060S476000, C060S475000, C091S437000

Reexamination Certificate

active

10900189

ABSTRACT:
A power steering system includes a reversible-type oil pump supplying hydraulic fluid to first and second pressure chambers of a hydraulic power cylinder through first and second passages and having first and second discharge ports, and a branch passage conveying part of hydraulic fluid discharged from the discharge ports of the oil pump to the outside of the pressure chambers of the power cylinder, wherein the branch passage has a passage sectional area greater than a total leak sectional area of the oil pump.

REFERENCES:
patent: 4838767 (1989-06-01), Ohe et al.
patent: 5279380 (1994-01-01), Frank et al.
patent: 5513720 (1996-05-01), Yamamoto et al.
patent: 5547349 (1996-08-01), Kimura et al.
patent: 6953102 (2005-10-01), Kurata et al.
patent: 2003/0024758 (2003-02-01), Fujita
patent: 2003/0178241 (2003-09-01), Yokota et al.
patent: 2005/0161278 (2005-07-01), Hamischfeger et al.
patent: 2002-145088 (2002-05-01), None

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