MULTISTAGE OIL PUMP
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United States of America Patent
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Issued Date -
Jun 18, 2015
app pub date -
May 16, 2013
filing date -
May 17, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Conventional multistage oil pumps could not have been used in an application where the pressure and the temperature are high. A multistage oil pump including two rotors that are connected in series in the direction of the rotation axis, wherein the respective rotors are accommodated in a rotor case separately across a spacer, the inside thereof being partitioned by the spacer part. The rotor case is in the form of an integral cylindrical part, and the spacer is integral with the rotor case. The rotors and the rotor case are made of a ferrous material, and the rotor case is fixed to a housing by positioning pins.
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