Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1979-12-11
1982-10-12
Michalsky, Gerald A.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91444, 91467, 13762524, F15B 910
Patent
active
043532888
ABSTRACT:
A rotary plug steering valve of the worm gear type for auxiliary power steering of motor vehicles is provided with a rotary plug valve and a coacting valve sleeve including means for flow passage of return hydraulic fluid to a servomotor via an inner ported sleeve disposed within the valve plug, which sleeve also serves as an alignment and bearing member for the valve plug. The advantage achieved by thus providing additional serial flow control edges between the rotary plug and a return connection via the inner sleeve is the reduction of hissing flow noises in steering operations, by a throttling of return oil flow during the relative rotation of the valve plug and the inner sleeve. This reduces the cross section of return oil flow passage, but causes no throttling in neutral position of the valve for straight ahead steering when respective passages of the valve plug and inner sleeve are in full register.
REFERENCES:
patent: Re25126 (1962-02-01), Charlson
patent: 4063490 (1977-12-01), Duffy
patent: 4194531 (1980-03-01), Bishop
Michalsky Gerald A.
Zahnradfabrik Friedrichshafen AG
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