Vacuum waste tank
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United States of America Patent
Stats
-
Nov 25, 2003
Grant Date -
May 31, 2001
app pub date -
Apr 21, 1999
filing date -
Apr 21, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A vacuum waste tank for use in a vacuum drainage system. The tank has a vacuum intake for attachment to a vacuum source and a waste water intake for attachment to a vacuum pipe. The vacuum source creates a negative pressure in the tank and vacuum pipe so that liquid entering the pipe is pulled into the tank. The tank is made of a thermoplastic material having a flexural modulus sufficient to withstand an external pressure loading caused by the vacuum in the tank without buckling.
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