Oil pump

Details Oil pump Oil pump

2005-11-28

2011-12-13

Kramer, Devon C (Department: 3746)

Pumps

Motor driven

Pump and motor interconnected by endless flexible...

C418S168000, C418S171000

Reexamination Certificate

active

08075284

ABSTRACT:
An oil pump includes a shaft bearing bore, a drive shaft supported by the shaft bearing bore, an annular space between an inner peripheral surface of the shaft bearing bore and an outer peripheral surface of the drive shaft, a communication passage portion formed on the side of a pumping chamber inside the shaft bearing bore, and a communication groove formed opposite to the communication passage portion inside the shaft bearing bore. The communication passage portion is communicated between a discharge port and the annular space, and the communication groove is communicated with the annular space. Oil is stored in the annular space from the discharge port via the communication passage portion, and the oil flows into sliding clearance spaces of first and second journal portions via the annular space and the communication passage portion and the communication groove.

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patent: 59-146591 (1984-09-01), None
patent: 09-329093 (1997-12-01), None
patent: 10-205317 (1998-08-01), None
patent: 2003-239869 (2003-08-01), None
Partial English Translation of Japanese Patent Publication Nos. 10-205317 and 9-329093.

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