Piston compressor for gaseous fluids

Motors: expansible chamber type – With motive fluid valve – Valved piston

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Details

92181P, 92187, 92194, 92240, 417552, F04B 2104, F15B 1304, F16J 908

Patent

active

040234673

ABSTRACT:
To permit dry operation of a piston within the cylinder, the cylinder is made of metal, and the piston is made of polytetrafluorethylene; the piston, preferably, is formed with an annular ring groove extending downwardly from an end face thereof to leave a circumferential lip, the groove having a spring located therein biasing the lip outwardly against the cylinder wall, to provide for sealing contact of the lip against the cylinder wall, which is additionally reinforced by pressure of the gas being compressed by movement of the piston within the cylinder, tending to expand the lip against the piston surface, at the time when the compression is highest, and sealing is the most desired.

REFERENCES:
patent: 714097 (1902-11-01), Caille
patent: 734277 (1903-07-01), Niemeyer
patent: 2106829 (1938-02-01), Christenson
patent: 2449740 (1948-09-01), Felser, Jr.
patent: 2516811 (1950-07-01), Thomas
patent: 2992052 (1961-07-01), DeJohn
patent: 3125004 (1964-03-01), White
patent: 3182568 (1965-05-01), Davis
patent: 3229855 (1966-01-01), Eggert, Jr.
patent: 3295419 (1967-01-01), Vielmo et al.
patent: 3295453 (1967-01-01), Scott
patent: 3375972 (1968-04-01), Raufeisen
patent: 3388638 (1968-06-01), Brinkel

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