Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1981-12-28
1985-05-14
Cline, William R.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91467, 13759612, 251121, F15B 910
Patent
active
045164711
ABSTRACT:
A power steering gear for controlling the dirigible wheels of an automotive vehicle comprising steering gear elements and a fluid motor adapted to drive the steering gear elements to supplement the manual steering effort comprising a rotary valve assembly for controlling distribution of steering pressure from a pressure source to the fluid motor including a sleeve element and a spool element, each valve element having cooperating lands for controlling distribution of pressurized fluid therethrough to effect a pressure buildup in a pressure supply port that communicates with a working chamber of the fluid motor and chamfered surfaces on the valve lands of the internal valve element whereby pressure drop in the pressurized fluid circulated through the valve system and fluid noise is reduced and response of the valve system to steering maneuvers is improved.
REFERENCES:
patent: 2919681 (1960-01-01), Schultz
patent: 3022772 (1962-02-01), Zeigler et al.
patent: 3312246 (1967-04-01), Tarn
patent: 3516437 (1970-06-01), Folkerts
patent: 3645494 (1972-02-01), Stelzer
patent: 3746045 (1973-07-01), Bunker et al.
patent: 4063490 (1977-12-01), Duffy
patent: 4137989 (1979-02-01), Rehfeld
patent: 4232586 (1980-11-01), Elser
patent: 4353288 (1982-10-01), Holub
Cline William R.
Ford Motor Company
Smith Randolph A.
Zerschling Keith L.
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