Scroll type fluid displacement apparatus with decreased manufact

Details Scroll type fluid displacement apparatus with decreased manufact Scroll type fluid displacement apparatus with decreased manufact

1997-05-09

1999-08-17

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 555, 418 57, 418151, 29888022, F01C 104, F01C 1706

Patent

active

059384182

ABSTRACT:
In a scroll type fluid displacement apparatus in which a drive pin (151) is connected between a large-diameter portion (15) of a main shaft (13) and a bushing (33) rotatably held to a movable scroll (26) and which a rotation of the main shaft is transmitted to the bushing through the drive pin to make the movable scroll have an orbital motion around a predetermined axis, a balance weight (331) attached to the bushing has a positioning projection (331c) which is engaged with the large-diameter portion in a rotation direction of the bushing. Therefore, the movable scroll is positioned relative to the main shaft. In addition, the movable scroll defines fluid pockets in cooperation with a fixed scroll (25) therebetween. When the orbital motion of the movable scroll is caused in dependence on rotation of the main shaft with inhibiting rotation of the movable scroll around the predetermined axis, the fluid pockets are displaced between the movable and the fixed scrolls.

REFERENCES:
patent: 4201521 (1980-05-01), Carlson
patent: 4259043 (1981-03-01), Hidden et al.
patent: 4406600 (1983-09-01), Terauchi et al.
patent: 4439118 (1984-03-01), Iimori
patent: 4466784 (1984-08-01), Hiraga
patent: 4597724 (1986-07-01), Sato et al.
patent: 5040958 (1991-08-01), Arata et al.
patent: 5366360 (1994-11-01), Bookbinder et al.
patent: 5779461 (1998-07-01), Iisuka et al.

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