Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1998-07-02
2000-11-07
Denion, Thomas
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418178, 418 554, 418142, 2988822, F04C 1800
Patent
active
061427551
ABSTRACT:
An oil-free scroll compressor used for compression of air or the like, comprises an orbiting scroll having a spiral-shaped lap or laps formed on one or both sides of an end plate, and a stationary scroll having a lap or laps adapted to mate with the orbiting scroll to define a compression chamber or chambers.
Grooves are formed on tips of the respective scroll laps, and elastic tip seals are fitted into the grooves in order to prevent leakage of compressed gas from between the laps and the end plates. Those surfaces of the orbiting scroll and of the stationary scroll or scrolls, which define the compression chamber or chambers, are subjected to surface treatment in order to prevent seizure or the like caused by sliding of the tip seals and the laps. The stationary scroll or scrolls are subjected to an anodizing coating treatment while the orbiting scroll is subjected to Ni--P--B treatment.
REFERENCES:
patent: 4732550 (1988-03-01), Suzuki et al.
patent: 5357164 (1994-10-01), Imabayashi et al.
patent: 5775892 (1998-07-01), Miyashaka et al.
patent: 5897965 (1999-04-01), Itoh et al.
Kawabata Natsuki
Kawano Isamu
Machida Shigeru
Mizumoto Muneo
Natori Tatsuo
Denion Thomas
Hitachi , Ltd.
Trieu Thai-Ba
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