Positive displacement pump
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United States of America Patent
Stats
-
Oct 3, 2000
Grant Date -
N/A
app pub date -
May 18, 1998
filing date -
May 22, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A positive displacement pump is provided which is high both in reliability and in durability being durable in a continuous operation for a long period of time with the suction side of the pump temperature-controlled. In the positive displacement pump, rotors (21, 22) are accommodated in a pump housing (10) to form a plurality of operating chambers (31, 32), in such a manner that the operating chambers (31, 32) are increased on the suction side and decreased on the discharge side. A temperature control system (40) for controlling the temperature (12) of the suction inlet (12) of the pump is provided.
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