Gas vane pump, and method of operating the pump

Details Gas vane pump, and method of operating the pump Gas vane pump, and method of operating the pump

2005-03-08

2009-12-08

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Interconnected vanes

Integrally connected

C418S093000, C418S094000, C418S099000, C418S100000

Reexamination Certificate

active

07628595

ABSTRACT:
A gas vane pump wherein a lubricant is intermittently introduced into a housing during rotation of a rotor, through a supply passage formed through the housing and the rotor, and the relative position between the rotor having a diametric hole and the housing having a communication groove is determined such that when the rotor is at an angular position in the middle of a predetermined angular range relative to the housing and the hole is in communication with the groove, a point of contact between a vane movably held by the rotor and the inner circumferential surface of the housing is located at the lowest position of the inner circumferential surface. When the rotor is stopped within the predetermined angular range, the vane divides the remaining lubricant into two portions, which are discharged at different times, making it possible to reduce the load on the vane upon restarting the pump.

REFERENCES:
patent: 2305317 (1942-12-01), Nickell
patent: 3499600 (1970-03-01), McGregor
patent: 3877851 (1975-04-01), Komiya et al.
patent: A 58-8289 (1983-01-01), None
patent: 60060288 (1985-04-01), None
patent: U 3-1294 (1991-01-01), None
patent: A 3-115792 (1991-05-01), None
patent: A 7-189971 (1995-07-01), None

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