Variable-displacement vane-pump

Details Variable-displacement vane-pump Variable-displacement vane-pump

1990-12-27

1992-02-25

Bertsch, Richard A.

Rotary expansible chamber devices

With changeable working chamber magnitude

Spring or fluid biased movable member

418 30, F04C 1504

Patent

active

050908812

ABSTRACT:
A variable-displacement vane-pump has a rotor which is rotatably supported by a pump housing in coaxial relationship therewith, and a cam ring interposed between the rotor and the pump housing in eccentric relationship with the pump housing. The rotor has radially outwardly slidable vanes on its outer peripheral surface in contact with an inner surface of the cam ring. Two side plates are disposed on both sides of the vanes, thereby defining pump chambers between every adjacent vanes. An arc-shaped intake port and an arc-shaped exhaust port are formed in one of two side plates, and respectively open into the pump chambers along one side face of the cam ring. In the other side face of the cam ring, a groove is formed except for the region corresponding to the exhaust port, and a partially cut off annular friction ring is disposed within the groove while urged by a seal ring into close contact with the other side plate. A pressure compensating recess having a configuration which conforms to that of the exhaust port and communicating with the pump chambers is formed in the other side face of the cam ring except for the region wherein the groove for the friction ring is formed.

REFERENCES:
patent: 3523746 (1970-08-01), Dadian
Karmel, A. M., "Stability and Regulation of a Variable-Displacement Vane-Pump", Journal of Dynamic Systems Measurement & Control, vol. 110, Jun. 1988, pp. 203-209.

Affiliated with

Also associated with

Rating

Variable-displacement vane-pump does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable-displacement vane-pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable-displacement vane-pump will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1889621