Reciprocating pump

Details Reciprocating pump Reciprocating pump

1985-11-22

1988-01-05

Croyle, Carlton R.

Pumps

Motor driven

Fluid motor

92 51, F04B 910

Patent

active

047173173

ABSTRACT:
The reciprocating pump is provided with a sleeve between the piston and the casing. The sleeve is disposed in spaced relation to define an annular gap both with respect to the piston and with respect to the casing. The sleeve is also biased by a spring into sealing engagement with the end wall of the casing. The end of the sleeve adjacent to the spring provides a permanent connection between the gap between the casing and sleeve and the pressure medium used to drive the piston of the pump so that the same pressure prevails on the inside and outside surfaces of the sleeve.

REFERENCES:
patent: 512776 (1894-01-01), Weathehead
patent: 2428460 (1947-10-01), Inglis
patent: 2828694 (1958-04-01), Nallinger
patent: 3482401 (1969-12-01), Waite
patent: 3490344 (1970-01-01), Archer et al.
patent: 3572035 (1971-03-01), Beroset
patent: 3877349 (1975-04-01), Schindel
patent: 3932989 (1976-01-01), Demetrescu
patent: 4438872 (1984-03-01), Dooley et al.
patent: 4527464 (1985-07-01), Frey
patent: 4536135 (1985-08-01), Olsen et al.

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