Membrane-air pump adapted to function as a tachometer

Details Membrane-air pump adapted to function as a tachometer Membrane-air pump adapted to function as a tachometer

1973-11-15

1976-02-03

Freeh, William L.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

73521, 346 18, F04B 4900, G01D 900, G01P 326

Patent

active

039362370

ABSTRACT:
A membrane-air pump functioning as a tachometer, having a first flow circuit whose pneumatic flow or pressure values serve as speed-dependent guide parameters for control or regulating apparatus. A second flow circuit leads from the pressure or delivery side of the membrane-air pump to the suction side thereof, and in which there is incorporated a flow throttle and a spring-loaded relief pressure valve in series connection with the second flow circuit. Preferably, the flow throttle, as well as the relief pressure valve are adjustable.

REFERENCES:
patent: 42956 (1864-05-01), Mackerley
patent: 862867 (1907-08-01), Eggleston
patent: 1052369 (1913-02-01), Nelson
patent: 2210154 (1940-08-01), Stevens et al.
patent: 2457571 (1948-12-01), Leibing
patent: 2509022 (1950-05-01), Turnquist
patent: 3036524 (1962-05-01), Johnson
patent: 3103891 (1963-09-01), Fulton et al.
patent: 3184978 (1965-05-01), General et al.
patent: 3189909 (1965-06-01), Suter
patent: 3415194 (1968-12-01), Connelly
patent: 3509776 (1970-05-01), Schaeffer
patent: 3547559 (1970-12-01), Tittmann

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