Power steering valve assembly mechanism with offset valve sleeve

Details Power steering valve assembly mechanism with offset valve sleeve Power steering valve assembly mechanism with offset valve sleeve

1991-02-04

1992-05-05

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

13762523, 74388PS, F15B 910

Patent

active

051097532

ABSTRACT:
In a valve assembly of a power steering device, the center line of a cylindrical bore of a valve sleeve intersects the center line of a radially extending pin hole in the valve sleeve and is displaced from the center line of the valve assembly toward the side of the sleeve opposite to the pin hole. The valve sleeve is thicker at its periphery adjacent to the pin hole, thereby increasing the engagement length of a drive pin with the pin hole. Consequently, the pressure-receiving area of the pin hole is increased, and the unit area engagement force of the valve sleeve is thus reduced. The bending moment on the drive pin is also reduced, which adds to the durability of the drive pin. Since a bearing stress is thus reduced, a driver never feels unexpected reaction, due to wear, applied to a steering wheel while the driver is manually turning the steering wheel.

REFERENCES:
patent: 3295624 (1967-01-01), Lee et al.
patent: 3470758 (1969-10-01), Liebert
patent: 3700004 (1972-10-01), Tobias
patent: 4128046 (1978-12-01), Rosell
patent: 4544131 (1985-10-01), Adams
patent: 4699174 (1987-10-01), Bishop
patent: 4823839 (1989-04-01), Rayner

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