Sucker rod pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 28, 1992
Grant Date -
N/A
app pub date -
Feb 27, 1991
filing date -
Feb 27, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A subsurface well pump is provided which is resistant to vapor locking. The pump is a reciprocating sucker rod pump which has a top inlet valve, and a means to vent vapors from the barrel of the pump on each stroke.
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