Piston ring manufacturing method

Details Piston ring manufacturing method Piston ring manufacturing method

1987-07-01

1989-06-06

Eley, Timothy V.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291565R, 29428, 72352, B23P 1506

Patent

active

048358568

ABSTRACT:
A method for manufacturing a piston ring for use in a refrigerant compressor is disclosed. The method includes the steps of disposing the piston ring in an annular groove which is formed on one end surface of a fixed holder; and pressuring the piston ring in the groove by a lower end surface of a press until the lower end surface of the press contacts the upper end surface of the fixed holder. At least one projection formed on either the fixed holder or the press contacts the piston ring. A plurality of grooves are thereby formed on one end surface of the piston ring as the pressing operation progresses.

REFERENCES:
patent: 1803309 (1931-04-01), Budlong
patent: 1815354 (1931-07-01), Grant
patent: 2372979 (1945-04-01), Phillips
patent: 3670383 (1972-06-01), Gavrun
patent: 3698054 (1972-10-01), Prasse
patent: 3758929 (1973-09-01), Fabregat

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