Clutch cylinder circuit and charging valve therefor

Details Clutch cylinder circuit and charging valve therefor Clutch cylinder circuit and charging valve therefor

1973-04-02

1978-01-24

Cohen, Irwin C.

Fluid handling

Systems

Multi-way valve unit

138 43, 251126, F16K 326, F16K 4712

Patent

active

040698432

ABSTRACT:
Hydraulic mechanism in a transmission for engaging a clutch for forward or reverse before a clutch for first, second, or third speed. Flow of pressure fluid to the latter clutch is by way of a quick fill spool having a large orifice, a rate of rise spool, and a poppet therein having a small orifice. A restricted orifice of appreciable, straight longitudinal or helically turned length is used in connection with the spools and the poppet in such a way that, after the power unit for the clutch for first, second, or third speed is filled with fluid, pressure of the fluid in the power unit is raised at controlled rate to its maximum.

REFERENCES:
patent: 2374593 (1945-04-01), Ernst et al.
patent: 2402729 (1946-06-01), Buchanan
patent: 3018041 (1962-01-01), Bidwell
patent: 3221770 (1965-12-01), Faisandier
patent: 3460577 (1969-08-01), Weathers

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