Bimodal, non-venting pneumatic relay

Details Bimodal, non-venting pneumatic relay Bimodal, non-venting pneumatic relay

1980-04-01

1982-04-20

Cohan, Alan

Fluid handling

Convertible

Unit orientable in a single location between plural positions

13762566, 13762569, 251324, 251361, 92 59, F16K 1107

Patent

active

043254020

ABSTRACT:
A bimodal, non-venting pneumatic relay senses the presence or absence of a first pressurized fluid and controls the supply or temination of a second pressurized fluid to associated equipment. The relay includes a segmented housing defining plural grooves which accept annular seals, a valve stem against which the seals seat and a reversible piston. The reversible piston can be selectively oriented and installed to provide either, manual rest operation to interrupt the supply of the second fluid if the first fluid supply is interrupted, the relay requiring manual resetting to reestablish supply of the second fluid, or automatic reset operation, wherein restoration of the second fluid supply is achieved automatically if the first fluid pressure is re-established subsequent to an interruption.

REFERENCES:
patent: 3516442 (1970-06-01), Munroe
patent: 3542065 (1970-11-01), Holbrook
patent: 3943974 (1976-03-01), Connelly
patent: 4073466 (1978-02-01), Snyder
patent: 4242946 (1981-01-01), Toliusis

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