Two stage check valve for automatic transmission system

Details Two stage check valve for automatic transmission system Two stage check valve for automatic transmission system

2008-02-04

2011-10-25

Estremsky, Sherry (Department: 3655)

Planetary gear transmission systems or components

With transmission cooling or heating means

C137S516270

Reexamination Certificate

active

08043186

ABSTRACT:
The two stage check valve for the automatic transmission system provides a first member that opens in response to a first pressure and a second member which opens in response to a second pressure where the second pressure is higher than the first pressure.

REFERENCES:
patent: 2625056 (1953-01-01), Kelley
patent: 2717673 (1955-09-01), Zeidler
patent: 2720124 (1955-10-01), Polomski
patent: 2786368 (1957-03-01), Cook
patent: 2861480 (1958-11-01), Curtis
patent: 3010278 (1961-11-01), Winchell et al.
patent: 3099166 (1963-07-01), Schou
patent: 3103832 (1963-09-01), Foerster
patent: 3303726 (1967-02-01), Christenson
patent: 3749123 (1973-07-01), Fletcher et al.
patent: 3977502 (1976-08-01), Chana
patent: 6951209 (2005-10-01), Yanase et al.

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