Method of manufacturing a movable scroll element and a scroll el

Details Method of manufacturing a movable scroll element and a scroll el Method of manufacturing a movable scroll element and a scroll el

1996-07-10

1998-01-27

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

29888022, F04C 1804, B23P 1700

Patent

active

057116598

ABSTRACT:
A movable scroll element for a scroll type compressor is produced by a combination of a mold casting process and a machining process. The mold casting process produces a cast product having an end-plate forming portion, a spiral-member-forming portion and a projecting portion for forming a drive power receiving portion. The cast product has an entire outer faces covered with black scale, and the machining process machines the end-plate-forming portion, a spiral member forming portion, the projecting portion by cutting. Nevertheless, at least an outer circumference of the drive power receiving portion, i.e., a boss portion of the movable scroll element is covered with an outermost layer consisting of black scale. Thus, a sufficient mechanical strength of the movable scroll element is obtained even if the wall thickness of the drive power receiving portion, i.e., the boss portion of the movable scroll element, is reduced.

REFERENCES:
patent: 4824345 (1989-04-01), Fukuhara et al.
patent: 5580401 (1996-12-01), Williamson

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