Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1986-06-23
1988-01-26
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
291568R, 29DIG11, 29DIG18, 72344, 72354, 72359, 72377, B23P 1500
Patent
active
047208996
ABSTRACT:
A method of manufacturing a scroll member for use in a rotary compressor has the steps of heating a material which has been preformed into a substantially frusta-conical body consisting of a flat upper surface portion provided with a cylindrical projection integrally formed in the center portion thereof and a lower surface portion having a conical surface and a flat projecting surface, and forging the material by a forging apparatus. The heating step compriss a first heating at a temperature in the range from 100.degree. to 200.degree. C. and a second heating at a temperature of 440.degree. C. which is carried out after coating the material with graphite, the coating being applied to the material between the first and the second heatings.
REFERENCES:
patent: 1213878 (1917-01-01), Jacocks
patent: 2369299 (1945-02-01), Kafowi
patent: 2629923 (1953-03-01), Johnson, Jr.
patent: 2835960 (1958-05-01), Rork
patent: 3434326 (1969-03-01), Serret
Ando Hiroyuki
Matsumoto Isamu
Goldberg Howard N.
Kabushiki Kaisha Komatsu Seisakusho
Wallace Ronald S.
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