Pumps – One fluid pumped by contact or entrainment with another – Liquid pumped by supplying or exhausting gaseous motive...
Patent
1999-06-04
2000-08-01
Freay, Charles G.
Pumps
One fluid pumped by contact or entrainment with another
Liquid pumped by supplying or exhausting gaseous motive...
251 65, 137102, F04F 106
Patent
active
06095759&
ABSTRACT:
A submersible pump is disclosed for use in a body of liquid such as a well or sump. The pump has an air intake port and an air outlet port, as well as a liquid intake port and a liquid discharge tube. A valve mounted within the pump selectively permits the pump's chamber to communicate with either the air intake port or the air discharge port. When liquid enters the pump's chamber, the air displaced by the incoming liquid is permitted by the valve to escape via the air outlet port. When the pump's chamber is sufficiently full of liquid, the valve closes off the air outlet port and permits compressed air to enter the pump's chamber via the air inlet port in order to force the accumulated liquid out the liquid discharge tube. A float in the pump's chamber rises and falls with the level of liquid in the chamber to actuate the valve. In one embodiment the valve comprises a movable member mounted for linear reciprocating movement within a valve housing to selectively bring a carried through-passage into fluidic communication with the appropriate air port. In a second embodiment, the valve comprises a movable member mounted for rotating reciprocating movement within a valve housing to selectively bring a carried through-passage into fluidic communication with the appropriate air port.
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