Control system for hydraulic coupling

Details Control system for hydraulic coupling Control system for hydraulic coupling

1973-06-19

1976-04-06

Cohen, Irwin C.

Motors: expansible chamber type

Differential

60468, 91421, 91451, 91464, 192 8719, 192109F, F15B 1116, F15B 1306, F16D 2506

Patent

active

039481468

ABSTRACT:
A dual hydraulic clutch with two operating positions and an intermediate neutral position receives pressure fluid through a three-position selector valve communicating with a pair of piston cylinders which are alternately under high and low fluid pressure in operation and are both under low pressure in neutral. Shifting the control valve partly unloads one of the cylinders into a throttled discharge line with generation of a pressure drop therein to actuate a bypass valve for instantly lowering the pressure in a supply line; the disappearance of this pressure drop upon termination of shifting gradually recloses the bypass valve for progressively raising the supply pressure to its operating level.

REFERENCES:
patent: 1964196 (1934-06-01), Cuttat
patent: 2501483 (1950-03-01), Taylor
patent: 2683966 (1954-07-01), Tyler
patent: 2981287 (1961-04-01), Caslow
patent: 3351170 (1967-11-01), Hengstler
patent: 3398650 (1968-08-01), Garnjost
patent: 3429123 (1969-02-01), Burroughs
patent: 3527328 (1970-09-01), Maurice
patent: 3584538 (1971-06-01), Petersen

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