Variable scroll tip hardness

Details Variable scroll tip hardness Variable scroll tip hardness

1994-06-06

1995-02-14

Bertsch, Richard A.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

2988802, 164122, 164137, 164348, F01C 104

Patent

active

053889738

ABSTRACT:
A process of casting a scroll member for a scroll compressor including forming the scroll wrap member portions of equal height. Unequal cooling of the scroll wrap when formed causes the hardness of the wrap to vary from radially outside to radially inside. The radially outside portions of the scroll wrap are formed harder therefore reducing wear-out of the scroll member while the radially inside portions are formed softer, thereby permitting quicker run-in of the scroll set during initial startup of the scroll compressor.

REFERENCES:
patent: 4456051 (1984-06-01), Hukuhara
patent: 4457674 (1984-07-01), Kawano
patent: 4472120 (1984-09-01), McCullough
patent: 4477238 (1984-10-01), Terauchi
patent: 4548555 (1985-10-01), Hiraga
patent: 4767293 (1988-08-01), Caillat

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