Vacuum toilet system with single pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 23, 2002
Grant Date -
N/A
app pub date -
Dec 19, 2000
filing date -
Dec 19, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A multi-position (e.g. three way) valve is operatively connected to a combined vacuum/holding tank for a vacuum toilet system, and to a pump capable of pumping both air and sewage. When the valve is in one position air is pulled from the tank through the pump to increase the vacuum level in the tank, e.g. to above 10 in/Hg. When the valve is moved to a second position by either a float or manual switch operation, the sewage is pumped out of the tank through the pump while surrounding air moves through the valve into the tank.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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