Motors: expansible chamber type – Differential
Patent
1974-07-29
1976-09-14
Cohen, Irwin C.
Motors: expansible chamber type
Differential
91445, 91447, 91454, 91461, 137523, 13759614, 214138C, E02F 328, F15B 1116, F15B 1308
Patent
active
039800008
ABSTRACT:
The invention is a control system for a hydraulic clamping device adapted to be connected to a source of pressurized hydraulic fluid and to a hydraulically operated clamp, which system comprises a path for supply of pressurized fluid to and from the clamp, a check valve in the said path, a hydraulically operated pilot piston movable between a non-actuating position and an actuating position in which it urges open the check valve, means to hold the pilot piston in the actuating position and thereby maintains the check valve open and a switching means for controlling the supply of pressurized fluid to and from the pilot piston, the switching means being capable of occupying a neutral position, a position in which pressurized fluid is supplied to the pilot piston to urge the pilot piston to the actuating position to open the check valve and a position in which pressurized fluid is supplied to the pilot piston to return the pilot piston to the non-actuating position and thereby permit the check valve to close.
REFERENCES:
patent: 2515395 (1950-07-01), Court
patent: 2547861 (1951-04-01), Fletcher
patent: 3030929 (1962-04-01), Hipp
patent: 3088489 (1963-05-01), Stacey
patent: 3397620 (1968-08-01), Skelton et al.
patent: 3429550 (1969-02-01), Grove
patent: 3608930 (1971-09-01), Moriceau et al.
patent: 3792640 (1974-02-01), Shore
patent: 3800669 (1974-04-01), Distler
Iijima Katsuhiko
Jomen Katsumasa
Cohen Irwin C.
Mitsubishi Jukogyo Kabushiki Kaisha
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