Vacuum drainage system

Details Vacuum drainage system Vacuum drainage system

1977-08-22

1979-05-22

Spitzer, Robert H.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Diverse sensing means

210170, 210220, 137236R, C02C 100, E03D 100

Patent

active

041558510

ABSTRACT:
A vacuum drain system including a collecting tank and a sewage drain vacuum conduit line for conveying sewage from service connections to the collecting tank under the influence of vacuum in the system. Each service connection for admitting sewage includes a suction valve which also admits a volume of air to facilitate movement of sewage in the system. In order to prevent accumulation of sewage during prolonged periods of low usage of the system, such as at night, an auxiliary aeration system is provided for introducing a volume of air independently of the air admitted through operation of the suction valves.

REFERENCES:
patent: RE28189 (1974-10-01), Liljendahl
patent: 3115148 (1963-12-01), Liljendahl
patent: 3229707 (1966-01-01), Suchan
patent: 3239849 (1966-03-01), Liljendahl
patent: 3525685 (1970-08-01), Edwards
patent: 3730884 (1973-05-01), Burns et al.
patent: 3788338 (1974-01-01), Burns
patent: 3807431 (1974-04-01), Svanteson
patent: 3959142 (1976-05-01), Dupre

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