Cleaning and liquid contact with solids – Apparatus – For work having hollows or passages
Patent
1995-04-04
1996-06-11
Stinson, Frankie L.
Cleaning and liquid contact with solids
Apparatus
For work having hollows or passages
134169R, 134168R, 134169A, B08B 908
Patent
active
055246559
ABSTRACT:
A sewage collection and disposal system for a passenger transport vehicle comprises a sewage collection tank having a sewage inlet connected to a sewer pipe of the vehicle and a sewage discharge outlet for draining sewage from the sewage collection tank under control of a drain valve. A cleaning liquid supply pipe connects a source of cleaning liquid under pressure to a cleaning liquid supply connection for introducing cleaning liquid into the sewage collection tank. A precharge tank that is in fluid communication with the sewage collection tank is also connected to the cleaning liquid supply pipe, whereby cleaning liquid is supplied to the precharge tank when cleaning liquid is supplied to the cleaning liquid supply member. A blower establishes a partial vacuum in the sewage collection tank when the drain valve is closed, whereby pressure difference between the precharge tank and the sewage collection tank forces cleaning liquid present in the precharge tank into the sewage collection tank.
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Beatty George T.
Mulligan William P.
Powers Theodore C.
Envirovac Inc.
Stinson Frankie L.
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