Pumps – Condition responsive control of pump drive motor – Responsive to accumulation of pumped liquid in receiver
Patent
1997-04-17
1999-08-03
Freay, Charles G.
Pumps
Condition responsive control of pump drive motor
Responsive to accumulation of pumped liquid in receiver
417 53, 4431, F04B 4900
Patent
active
059316420
ABSTRACT:
A vacuum sewage handling assembly particularly for boats and recreational vehicles or caravans has a minimum of components because the conventional vacuum and holding tanks have been combined into a single substantially unreinforced, non-cylindrical, all plastic tank. The tank has a contoured, convoluted, discontinuous surface (e.g. formed by grooves, channels, and other discontinuities) so that it has no continuous flat surface area of more than about 80 square inches. The combined vacuum and holding tank may mount a vacuum pump, and optionally mounts a sewage discharge pump. The tank preferably has a generally parallelepiped configuration, and an interior volume of between about 45-65 liters, has a maximum vacuum level of about 26 cm of mercury, and is connected to other conventional portions of a vehicle toilet system, including outlets penetrating the exterior of the vehicle. The tank may have wheels and a handle.
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Friedman William J.
McKiernan Edward
Sigler James A.
Freay Charles G.
Ratcliffe Paul L.
Sealand Technology, Inc.
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