Vane pump having an abradable coating on the rotor

Details Vane pump having an abradable coating on the rotor Vane pump having an abradable coating on the rotor

2006-08-08

2006-08-08

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

C418S178000

Reexamination Certificate

active

07086845

ABSTRACT:
A vane pump includes a cylindrical rotor rotatable inside of an oval-shaped rotor chamber of cam ring disposed between a pressed plate and a pressure plate. The rotor has opposite sides and a peripheral outer surface in which radial vane slots are formed and guide slideable vanes. The rotor is coated on its surfaces with a film of abradable coating material which reduces the operating clearance between the rotor and the thrust and pressure plates and cam ring so as to increase the volumetric efficiency of the pump.

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European Search Report dated Apr. 16, 2004 for EP Ser. No. 04075066.3.

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