Fail-safe fluid control valve

Details Fail-safe fluid control valve Fail-safe fluid control valve

1976-05-12

1978-05-23

Cohen, Irwin C.

Motors: expansible chamber type

With motive fluid valve

For double-acting motor

91363A, 137596, 13762569, F15B 1304

Patent

active

040904296

ABSTRACT:
A fail-safe fluid control valve including a first sleeve fixedly accommodated in a valve housing, a second sleeve reciprocably movably received in the first sleeve. The first and second sleeves are suitably grooved and ported, and the valve spool is formed properly with annular flanges. When there occur such abnormal conditions that the second sleeve and the valve spool are jammed or stuck to each other, the second sleeve is adapted to be moved in unison with the valve spool to actuate the fail-safe fluid control valve under entirely the same conditions as normal conditions.

REFERENCES:
patent: 2613650 (1952-10-01), Mott
patent: 2771907 (1956-11-01), Joy
patent: 3152610 (1964-10-01), McAfee, Jr.
patent: 3253613 (1966-05-01), Richolt
patent: 3439707 (1969-04-01), York et al.
patent: 3556155 (1971-01-01), Morris et al.
patent: 3768376 (1973-10-01), Orme
patent: 3899001 (1975-08-01), Orme

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