Lubricant-tight vane rotary vacuum pump

Details Lubricant-tight vane rotary vacuum pump Lubricant-tight vane rotary vacuum pump

2007-12-12

2010-12-21

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Multistage

Sliding vane

C418S088000, C418S096000, C418S259000, C418S270000, C417S281000, C417S295000

Reexamination Certificate

active

07854601

ABSTRACT:
A lubricant-tight vane rotary vacuum pump includes at least one pump stage (17, 18) having a safety valve (3) for controlling gas flow to the pump stage, a lubricant pump, a lubricant reservoir (30) at least partially surrounding the pump stage housing (10, 40), and a hydraulic conduit (31) connecting the lubricant pump outlet (22) with the safety valve (3), with a pressurized lubricant flow through the hydraulic conduit (31) opening the safety valve (3), and a channel (32) branching from the hydraulic conduit (31) for delivering a pressurized lubricant into the lubricant reservoir (30).

REFERENCES:
patent: 3838950 (1974-10-01), Andriulis
patent: 4276005 (1981-06-01), Bassan
patent: 4483667 (1984-11-01), Berges et al.
patent: 4898521 (1990-02-01), Sakurai et al.
patent: 4968223 (1990-11-01), DaCosta
patent: 5232355 (1993-08-01), Fujii et al.
patent: 2005/0260082 (2005-11-01), Conrad et al.
patent: 4443387 (1996-01-01), None
patent: 102004024554 (2005-12-01), None
patent: 60090998 (1985-05-01), None

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