Steering force control apparatus for power steering system

Details Steering force control apparatus for power steering system Steering force control apparatus for power steering system

1989-07-17

1991-02-26

Jones, W. Gary

Liquid purification or separation

Structural installation

Closed circulating system

210232, 2104165, 210428, 210432, 2104331, 210451, 210453, 21049701, 180141, 60454, 137549, B01D 3502

Patent

active

049959700

ABSTRACT:
A steering force control apparatus for a power steering system includes a hydraulic path, a branch path, and a cylindrical filter. The hydraulic path extends from a pump to a power steering side. The branch path has one end open to a wall midway along the hydraulic path and extends to a hydraulic reaction mechanism. The cylindrical filter is adjacent to the wall of the hydraulic path and has a mesh portion for filtering a pressurized oil. The mesh portion is formed at a portion of the cylindrical filter at which the hydraulic path communicates with the branch path. The portion of the filter at which the hydraulic path communicates with the branch path has a tapered stepped portion mechanically formed at the downstream side of the branch path. The cylindrical filter has upper and lower ring frame members to be fitted in the hydraulic path. The lower ring frame member is formed to have an outer diameter smaller than that of the upper ring frame member. The lower ring frame member has a tapered portion which is formed at a bottom portion of the lower ring frame member so as to be inclined inwardly in accordance with the tapered stepped portion of the hydraulic path, and a small-diameter portion extending from the tapered portion to the downstream side thereof.

REFERENCES:
patent: 3193102 (1965-07-01), Bottoms et al.
patent: 4133768 (1979-01-01), Theriot
patent: 4459208 (1984-07-01), Lemon
patent: 4471796 (1984-09-01), Sonoda et al.
patent: 4787469 (1988-11-01), Yoshida et al.
patent: 4790401 (1988-12-01), Sonada

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