Scroll fluid machine having wrap start portion with thick base a

Details Scroll fluid machine having wrap start portion with thick base a Scroll fluid machine having wrap start portion with thick base a

1989-09-15

1991-08-06

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418150, F01C 104

Patent

active

050372793

ABSTRACT:
A scroll fluid machine in which a stationary scroll member and an orbiting scroll member each have an end plate and involute wrap on said end plate and mesh with each other. A winding-start portion of the wrap has such a section such that a base thereof is thick and the tip thereof is thin, with a curve of an inside line at each of the bases of the wraps is made as thick as possible while avoiding mutual interference between the wrap of fixed scroll member and the wrap of orbiting scroll member. A curve of an inside line at each of tips of the wraps has such a shape that it gradually thinned toward an inner periphery end thereof, and a section of each wraps in the wrap axial direction has such a shape that it is gradually reduced in thickness from the base toward the tip.

REFERENCES:
patent: 4594061 (1986-06-01), Terauchi
patent: 4666380 (1987-05-01), Hirano et al.
patent: 4678415 (1987-07-01), Hirano et al.

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