Pumps – Motor driven – Fluid motor
Patent
1980-12-22
1983-05-10
Smith, Leonard E.
Pumps
Motor driven
Fluid motor
92129, F04B 3500
Patent
active
043827500
ABSTRACT:
A free piston compressor for gases and liquids in which the positive pressure of the incoming fluid holds the piston against the piston rod during the intake stroke. In a specific form, the cylinder head is a plug of larger diameter than the piston which can be unscrewed to permit removal and replacement of the piston for service.
REFERENCES:
patent: 1081784 (1913-12-01), Spohrer
patent: 1372391 (1921-03-01), Barner
patent: 1729430 (1929-09-01), Machtolf
patent: 2216573 (1940-10-01), Owsley
patent: 2991003 (1961-07-01), Peterson
patent: 3077838 (1963-02-01), Maglott
patent: 3771912 (1973-11-01), Conlee
Robertson Walter W.
Robertson, Jr. Walter W.
Hammar Ralph
Hydro-Pac, Inc.
Smith Leonard E.
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