Fluid handling – Processes
Patent
1980-10-17
1983-08-30
Cohan, Alan
Fluid handling
Processes
137596, 192 13R, F16D 6704
Patent
active
044011326
ABSTRACT:
A crawler tractor vehicle having steering clutches and associated steering brake includes a control apparatus for each clutch and brake system, including a valve made up of a valve body, and a clutch valving spool and a brake valving spool movably associated therewith. In one embodiment, the clutch valving spool and brake valving spool are identical in configuration, and are disposed in a common bore. Actuator means are associated with such clutch valving spool and brake valving spool, in one embodiment including an actuator assembly made up of a plurality of plungers movable relative to each other and relative to the valve body to provide particular movement of the clutch and brake valving spools. In another embodiment, the actuator means comprise mechanical linkage means, for providing movement of brake and clutch valving spools positioned in respective separate bores defined by the valve body.
REFERENCES:
patent: 2589731 (1952-03-01), Ratkoviak
patent: 2733732 (1956-02-01), Baker
patent: 2829670 (1958-04-01), Nix
patent: 3092131 (1963-06-01), Lamb
patent: 3101738 (1963-08-01), Horlacker
patent: 3335756 (1967-08-01), McPherson
patent: 3757817 (1973-09-01), Wheeler
patent: 4027474 (1977-06-01), Damase
Burdette Stephen D.
Cackley George W.
Hakes Gary A.
Morris Hugh C.
Shook Norma G.
Caterpillar Tractor Co.
Cohan Alan
Grant John W.
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