Piston for use in a gas pump

Details Piston for use in a gas pump Piston for use in a gas pump

1988-05-27

1989-11-21

Garrett, Robert E.

Expansible chamber devices

Piston

Nonmetallic portion

92258, 92172, 277216, 277221, F16J 900

Patent

active

048814555

ABSTRACT:
A piston slidably inserted in the cylinder of a gas pump, said cylinder having a cylinder head and an outlet valve located near the cylinder head. The piston comprises a cylindrical piston body and a wear-reducing sheet wound one time around the piston body. The opposing edges of the wear-reducing sheet are cut stepwise, such that at least two gaps are formed between the edges, which are set apart from each other for a predetermined distance in the circumferential direction of the piston body, and such that no gap portion is formed between the edges, which connects the two gaps and extends substantially in the circumferential direction of the piston body.

REFERENCES:
patent: 603376 (1898-05-01), Field et al.
patent: 1179283 (1916-04-01), Cooper
patent: 1390577 (1921-09-01), Nagy
patent: 2464653 (1949-03-01), Phipps
patent: 2759777 (1956-08-01), Anderson
patent: 3655208 (1972-04-01), Walker
patent: 4189161 (1980-02-01), Grimm
patent: 4719938 (1988-01-01), Pandorf
Journal of Teflon pp. 6-7 Tests try "Teflon" for Diesel Engine Piston Rings, Sugimoto Copyright 6/1966.

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