Operating valve assembly for a power steering

Details Operating valve assembly for a power steering Operating valve assembly for a power steering

1980-02-15

1982-09-07

Michalsky, Gerald A.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91467, F15B 910

Patent

active

043477801

ABSTRACT:
An operating valve assembly for a power steering unit comprises inner and outer sleeves in sliding contact with each other and relatively rotatable in response to the twisting of a torsion bar corresponding to a steering load. The outer sleeve is formed in its inner circumferential surface with a plurality of recesses circumferentially spaced apart and having circular opening edges, which recesses are alternately connected to a pump and a drain chamber. The inner sleeve is formed in its outer circumferential surface with grooves establishing communication between adjacent ones of the aforesaid recesses. The outer sleeve is formed with apertures opening into the respective grooves, with the apertures being alternately connected to one or the other of the power cylinder chambers. The operating valve assembly is inexpensive and easy to manufacture.

REFERENCES:
patent: 3525362 (1970-08-01), Briggs
patent: 3591136 (1971-07-01), Bishop

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