Multicylinder swash plate compressor piston ring arrangement

Details Multicylinder swash plate compressor piston ring arrangement Multicylinder swash plate compressor piston ring arrangement

1980-05-20

1982-09-28

Freeh, William L.

Expansible chamber devices

Relatively movable working members

Interconnected with common rotatable shaft

417269, F04B 118

Patent

active

043512275

ABSTRACT:
A compact lightweight multicylinder swash plate compressor is disclosed having a metallic double-ended piston with piston heads reciprocated in aligned metallic cylinder bores. Each piston head has a diametrical dimension substantially less than the diametrical dimension of its respective bore to provide a substantial annular space therebetween and a solid seal-support ring of slippery material is expanded over each piston head and contracts into a circumferential groove therein. Each ring is sufficiently thick that the memory recovery thereof after further contraction forced by a tool causes the ring to sealingly engage its respective bore immediately after assembly with its piston head therein. The metal of the piston head on opposite sides of the groove is thereby prevented from touching the metal of its respective bore throughout its reciprocation in the bore. Each ring groove is formed with a plurality of projections which are spaced about and project outward from the bottom thereof. The projections project sufficiently outward and are configured so that they substantially bite or imbed themselves in the underside of the ring mounted thereover during assembly of the piston heads with the rings thereon in their respective bores. Each piston is thereby positively prevented from both rotary and longitudinal rubbing movement in its rings to thereby prevent the rings from wearing away the metal of the piston heads at the bottom and shoulders of their groove whereby both sealing and prevention of metal to metal contact between the piston heads and their respective bores is maintained by the rings.

REFERENCES:
patent: 3215341 (1965-11-01), Francis
patent: 3885460 (1975-05-01), Park
patent: 3904320 (1975-09-01), Kishi et al.
patent: 3924968 (1975-12-01), Gaines et al.
patent: 3930758 (1976-01-01), Park
patent: 3999894 (1976-12-01), Nakayama
patent: 4101250 (1978-07-01), Nakayama et al.
patent: 4135862 (1979-01-01), Degawa

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