Pumps – Successive stages – Reciprocating rigid stages
Patent
1993-05-03
1994-06-28
Bertsch, Richard A.
Pumps
Successive stages
Reciprocating rigid stages
417397, F04B 300
Patent
active
053241754
ABSTRACT:
A two stage free piston pneumatically operated air compressor having an integral and coaxial power piston, first stage piston and second stage piston. The discharge of the compressor first stage is the inlet for the compressor second stage. A piston-type throttling valve is used to control the speed of the reciprocating piston. The piston-type throttling valve is responsive to the pressure drop across a fixed orifice.
REFERENCES:
patent: 3249289 (1966-05-01), Maglott
patent: 4102609 (1978-07-01), Wood
patent: 4104008 (1978-08-01), Hoffmann et al.
patent: 4382750 (1983-05-01), Robertson et al.
patent: 4653986 (1987-03-01), Ashton
patent: 4684332 (1987-08-01), Hartley et al.
Robinson Ward H.
Sorensen Harold P.
Basichas Alfred
Bertsch Richard A.
Minns Michael H.
Northern Research & Engineering Corporation
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