Pumps – With condition responsive pumped fluid control – Pressure responsive relief or bypass valve
Patent
1983-03-28
1985-06-11
Freeh, William L.
Pumps
With condition responsive pumped fluid control
Pressure responsive relief or bypass valve
417308, F04B 4908
Patent
active
045225680
ABSTRACT:
A valve plate, inserted between the cylinder body and head parts of a compressor, holds the usual compression valve, which opens to connect the compression and pressure chambers during the compression stroke of the piston, and the suction valve which opens to connect the suction and compression chambers during the piston intake stroke. A separate plate-type idle valve also within the plate is positioned to open into a recess of the compression chamber so that there is no interference with the movement of the piston. The idle valve is controlled by an idle piston actuated by pressurized air admitted through a pressure regulator which opens when the reservoir pressure exceeds a predetermined level. Opening the idle valve shifts the compressor operation from compression to idle condition by permitting unhindered passage of air between suction and compression chambers.
REFERENCES:
patent: 718132 (1903-01-01), Lamplough
patent: 1810540 (1931-06-01), Thomas
patent: 2626100 (1953-01-01), McIntyre
patent: 4408967 (1983-10-01), Unger et al.
Gelse Hans-Dieter
Heger Werner
Kramer Manfred
Freeh William L.
Olds T.
WABCO Fahrzeugbremsen GmbH
Williamson, Jr. A. G.
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