192 clutches and power-stop control – Elements – Thrust members – retarders – and stops
Patent
1976-01-02
1976-11-16
Wyche, Benjamin W.
192 clutches and power-stop control
Elements
Thrust members, retarders, and stops
1371163, 91447, F16D 2512, F16K 3112
Patent
active
039918653
ABSTRACT:
A device for gradually increasing hydraulic pressure in a hydraulic fluid supply control circuit for respective hydraulically operated cylinder-piston assemblies of clutches provided in a transmission, which has an inlet connected to a source of hydraulic pressure, an outlet connected to each of the cylinder-piston assemblies, a passage for communicating said inlet with said outlet, a quick return valve provided in said package and having a large diameter land portion and a plurality of small diameter land portions, means for gradually increasing hydraulic pressure including a cylindrical valve and a pressure regulating valve, wherein said pressure regulating valve is shut off from the main hydraulic circuit until the cylinder chamber of said clutch brake cylinder-piston assembly is filled with hydraulic fluid, whereby peak pressure is not produced immediately before the hydraulic pressure is started so as to permit the hydraulic pressure to be gradually increased.
REFERENCES:
patent: 2939557 (1960-06-01), Dabich et al.
patent: 3566716 (1971-03-01), Chatterjea
patent: 3583422 (1971-06-01), Dach et al.
patent: 3625322 (1971-12-01), Nagamatsu et al.
patent: 3674121 (1972-07-01), Copeland
patent: 3687152 (1972-08-01), Osaka
patent: 3709065 (1973-01-01), Starling
patent: 3722646 (1973-03-01), Oguma
Kabushiki Kaisha Komatsu Seisakusho
Wyche Benjamin W.
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