Scroll member and method of forming a scroll member

Details Scroll member and method of forming a scroll member Scroll member and method of forming a scroll member

1991-10-21

1992-06-16

Look, Edward K.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

29888022, 409131, 407 53, F01C 102, B23P 1534

Patent

active

051220407

ABSTRACT:
A scroll member is formed using a scroll profile cutter including a first portion generating a diameter equal to the desired width between scroll involute flanks, where the first portion also is of a length determined by a distance between the tip of the cutter and a second portion of greater diameter. The length of the first portion determines the scroll wrap height. Radii are provided at both ends of the first portion of the scroll profile cutter so that a fillet is generated at the base of the corresponding scroll wrap and a radius is generated at the edges of the scroll wrap tip to improve the strength of the scroll wrap and to remove sharp corners which could burr or interfere with the base of the opposing scroll wrap.

REFERENCES:
patent: 3758222 (1973-09-01), Oakes
patent: 3857305 (1974-12-01), Licht
patent: 4411563 (1983-10-01), Moon
patent: 4441870 (1984-04-01), Ikegawa et al.
patent: 4512066 (1985-04-01), McCullough
patent: 4615091 (1986-10-01), Niwa et al.
patent: 4666380 (1987-05-01), Hirano et al.
patent: 4726100 (1988-02-01), Etemad et al.

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