Pumps – Combined
Patent
1998-09-03
2000-10-03
Yuen, Henry C.
Pumps
Combined
277345, 184 26, F04B 2300
Patent
active
061264113
ABSTRACT:
In open drive refrigerant compressors, the location where the shaft extends through the casing provides a potential location for leakage of refrigerant. Where a shaft seal is used which requires an oil seal, the draining of oil from the shaft seal cavity, upon stopping the compressor, is prevented by placing a check valve downstream of the shaft seal cavity which forms a part of the oil distribution system. An optional check valve may be located upstream of the shaft seal cavity.
REFERENCES:
patent: 3617155 (1971-11-01), Hansen et al.
patent: 4071254 (1978-01-01), Raimondi et al.
patent: 5176505 (1993-01-01), Horii et al.
patent: 5772214 (1998-06-01), Stark
Flanigan Paul J.
Johns Curtis E.
Carrier Corporation
Castro Arnold
Yuen Henry C.
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