Pumps – One fluid pumped by contact or entrainment with another – Liquid pumped by supplying or exhausting gaseous motive...
Patent
1998-08-13
2000-10-24
Walberg, Teresa
Pumps
One fluid pumped by contact or entrainment with another
Liquid pumped by supplying or exhausting gaseous motive...
F04F 106
Patent
active
061357219
ABSTRACT:
A vacuum operated pumping system is disclosed, and may include a single-, dual-, triple- or multiple-chamber arrangement. In one embodiment, the pumping system comprises a first chamber having a first liquid inlet, a first liquid outlet, and a first air port communicating with a first air line. An inlet conduit communicates with the first liquid inlet and a liquid supply source. An inlet check valve is adapted to prevent liquid from flowing from the first chamber toward the liquid supply source, while an outlet check valve is adapted to prevent liquid from flowing through the first liquid outlet toward the first chamber. A second chamber is provided having a second liquid outlet. The second chamber communicates with the first liquid outlet. A vacuum generator is placed in operable communication with the first air line and a compressed air source. A sensor such as a float assembly detects a level of liquid contained in the first chamber. Also provided are one or more solenoid valves and pressure regulators for directing air flow from the compressed air source to the vacuum generator in response to a detected low level of liquid contained in the first chamber, and for directing the air flow to the first air line in response to a detected high level of liquid contained in the first chamber.
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Patel Vinod D
Walberg Teresa
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