Gas compression apparatus capable of preventing lubricant...

Details Gas compression apparatus capable of preventing lubricant... Gas compression apparatus capable of preventing lubricant...

2007-11-20

2007-11-20

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

With mechanical sealing

C418S201100

Reexamination Certificate

active

10961098

ABSTRACT:
In a gas compression apparatus, a space (41a) between oil seals (18, 23) and bearings (15, 21) is adapted to communicate with a low pressure lead hole (42) open to the atmosphere through a blow-down lead hole (41). The low pressure lead hole is opened/closed by an on-off valve (43) arranged on the side of the blow-down lead hole nearer to the low pressure lead hole. As a result, when the gas compression apparatus stops operation, the internal pressures of the space (41a) and a lubricant space (9) drop while the internal pressure of a compression chamber (10a) drops. A valve body (44) thus moves down and opens the low pressure lead hole, so that the internal pressure of the lubricant space becomes substantially equal to the atmospheric pressure. Thus, the lubricant is prevented from leaking from the lubricant space into the compression chamber.

REFERENCES:
patent: 4153395 (1979-05-01), O'Neill
patent: 4781553 (1988-11-01), Nomura et al.
patent: 5836753 (1998-11-01), Takei et al.
patent: 6612820 (2003-09-01), Staat et al.
patent: 6663366 (2003-12-01), Okada et al.
patent: 62261689 (1987-11-01), None
patent: A-5-312165 (1993-11-01), None
patent: A-2001-182680 (2001-07-01), None
patent: 1679059 (1991-09-01), None

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