Piston and piston rod construction for pumps and method of flush

Details Piston and piston rod construction for pumps and method of flush Piston and piston rod construction for pumps and method of flush

1972-08-09

1977-05-17

Cohen, Irwin C.

Expansible chamber devices

Passage in cylinder for application of separate fluid to...

92 87, 92112, 92160, F01B 3100

Patent

active

040234690

ABSTRACT:
A piston and piston rod construction for use in a double-acting reciprocating pump, and a method of flushing a piston-type pump. The piston has spaced apart rubbers mounted on a body intermediate its length. The rubbers have confronting lips. Each rubber alternately is the working rubber and the idle rubber as the pump operates. Fluid under a pressure greater than the pump discharge pressure is introduced to the space between rubbers, where it is effective to flush particles from the surface of the liner in front of the working rubber.

REFERENCES:
patent: 1818187 (1931-08-01), Bailey
patent: 2188105 (1940-01-01), Caldwell
patent: 2315012 (1943-03-01), Park
patent: 2367185 (1945-01-01), Cary
patent: 2827860 (1958-03-01), Roberts
patent: 3104619 (1963-09-01), Swarthout
patent: 3279383 (1966-10-01), Smith

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