Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1991-12-06
1992-12-29
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 57, F04C 1804, F04C 2910
Patent
active
051747391
ABSTRACT:
A scroll-type compressor comprising an eccentricity adjusting bushing interposed between an orbiting scroll member and a driving shaft in order to prevent a radial leakage of a compressed fluid, a driving pin of the driving shaft being received in an inner opening of the bushing, and stoppers for limiting a rotation of the bushing with respect to the pin to a predetermined extent. The stoppers comprise a plane side surface provided at a side of an inner opening of the bushing and a cutoff plane surface provided at a side of the driving pin. The compressor of this invention provides advantage in that opposite directional rotation of the bushing with respect to the driving pin is limited to an angular range by virtue of mutual interference between the stoppers, thereby causing the change of a radius of orbital movement of the orbiting scroll, that is, a change of a distance between centers of the bushing and the driving shaft to be limited to a desired minute range.
REFERENCES:
patent: 4415317 (1983-11-01), Butterworth
patent: 4439118 (1984-03-01), Iimori
patent: 4580956 (1986-04-01), Takahashi et al.
patent: 4597724 (1986-07-01), Sato et al.
patent: 4836758 (1989-06-01), Elson et al.
Gold Star Co. Ltd.
Vrablik John J.
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