Compressor

Details Compressor Compressor

2005-11-29

2005-11-29

Solak, Timothy P. (Department: 3746)

Pumps

Motor driven

Electric or magnetic motor

C417S410300, C418S201100, C418S141000, C277S412000

Reexamination Certificate

active

06969242

ABSTRACT:
To counter downstream oil infiltration through a shaft seal, a small portion of the compressed fluid is diverted from downstream to upstream through a passageway in a rotor. The diverted fluid is introduced to a space at a downstream side of the seal. An exemplary implementation is in a compressor having a central male rotor intermeshed with a pair of female rotors. The seal is located at an upstream (inlet) end of the lobed working portion of the male rotor.

REFERENCES:
patent: 3063378 (1962-11-01), Hart
patent: 3156191 (1964-11-01), Lauck
patent: 3811805 (1974-05-01), Moody et al.
patent: 4375156 (1983-03-01), Shaw
patent: 4983106 (1991-01-01), Wright et al.
patent: 5051077 (1991-09-01), Yanagisawa et al.
patent: 6095780 (2000-08-01), Ernens
patent: 6485279 (2002-11-01), Zhong et al.

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