Pneumatic sewage ejector

Details Pneumatic sewage ejector Pneumatic sewage ejector

1976-05-05

1978-04-11

Freeh, William L.

Pumps

One fluid pumped by contact or entrainment with another

Liquid pumped by supplying or exhausting gaseous motive...

137416, 137433, 210104, 210121, 417138, 417147, F04F 106

Patent

active

040836614

ABSTRACT:
A pneumatic sewage ejector includes a tank for holding fluid sewage. When the sewage reaches a predetermined high level in the tank, it is ejected by pressurized air forced into the tank through a valve located inside the tank. The ejection of the fluid is initiated by a float which responds to the high fluid level in the tank by ascending and thereby moving the valve to an air-input position to admit pressurized air into the tank to expel fluid. The valve remains in the air-input position until the fluid reaches a low level, at which time the float descends and moves the valve to a vent position to vent the pressurized air to the atmosphere. The float moves the valve between the air-input position and the vent position in one discrete step so that the valve cannot stop in an intermediate position.

REFERENCES:
patent: 775443 (1904-11-01), Carpenter
patent: 1558607 (1925-10-01), Hazeltine
patent: 2270434 (1942-01-01), Gould
patent: 2373935 (1945-04-01), Winter
patent: 2383834 (1945-08-01), Yeomans
patent: 2481894 (1949-09-01), Yeomans

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