Variable displacement pump

Details Variable displacement pump Variable displacement pump

2011-04-26

2011-04-26

Kramer, Devon C (Department: 3746)

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

C418S026000, C418S030000, C277S589000, C277S903000

Reexamination Certificate

active

07931450

ABSTRACT:
In a variable displacement pump, an outer peripheral surface approximately in an opposite side to a portion supported to an oscillation supporting point in a cam ring with respect to a pump shaft is formed as a convex surface portion holding a seal member brought into slidable contact with an inner peripheral surface of an outer case, and an inner peripheral surface of the outer case with which the seal member held to the convex surface portion of the cam ring is brought into slidable contact is formed as a circular arc surface around the oscillation supporting point.

REFERENCES:
patent: 6155797 (2000-12-01), Kazuyoshi
patent: 6790013 (2004-09-01), Hunter et al.
patent: 7128542 (2006-10-01), Suzuki et al.
patent: 2001-59481 (2001-03-01), None

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