Fluid handling – Pressure modulating relays or followers
Patent
1975-08-25
1976-04-27
Cohan, Alan
Fluid handling
Pressure modulating relays or followers
137608, G05D 1158
Patent
active
039527603
ABSTRACT:
A multiple low pressure selector relay having a housing provided with a plurality of low pressure relays each having an exhaust port. A movable selector is carried by the housing and has means for closing all of the exhaust ports except two thereof when the selector is in one position thereof, the selector having the means thereof opening other of the exhaust ports when the selector is moved to other positions thereof whereby the desired number of exhaust ports in addition to the two thereof can be opened.
REFERENCES:
patent: 3223105 (1965-12-01), Hogel
patent: 3602246 (1971-08-01), Hettinger
patent: 3785403 (1974-01-01), Kirk
Cohan Alan
Robertshaw Controls Company
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