High pressure piston pump and wiper, sealing, valving structure

Details High pressure piston pump and wiper, sealing, valving structure High pressure piston pump and wiper, sealing, valving structure

1975-08-19

1977-06-14

Freeh, William L.

Pumps

Expansible chamber type

Control by withdrawal or tilting of pump piston relative to...

92168, 417403, 417540, 417900, F04B 704

Patent

active

040294420

ABSTRACT:
A high pressure piston pump especially suitable for moving heavy high viscosity and abrasive materials, which has its piston in substantial clearance relation in a cylinder, is operable in a pumping stroke to drive into a flexibly deflectable, elastic combination valving, wiping and sealing elastomeric ring which not only maintains tensioned sealing engagement with the piston but also reacts to pump pressure to improve the sealing engagement during pumping stroke of the piston, and permits relaxation of grip on the piston and leakage forwardly along the piston during return stroke suction in front of the piston.

REFERENCES:
patent: 1043267 (1912-11-01), Stallsworth
patent: 1819381 (1931-08-01), Palmer
patent: 2393096 (1946-01-01), Fitzgerald
patent: 2569903 (1951-10-01), Santarelli
patent: 2593316 (1952-04-01), Kraft
patent: 2951450 (1960-09-01), Fisher
patent: 3233554 (1966-02-01), Huber et al.
patent: 3802805 (1974-04-01), Roeser

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