High pressure liquid piston pump

Details High pressure liquid piston pump High pressure liquid piston pump

1982-09-27

1985-08-20

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

417437, F04B 910

Patent

active

045361355

ABSTRACT:
A piston and a cylinder within a pump housing cooperate with the inner walls of the housing to form a high-pressure reservoir surrounding the cylinder to provide a continuous compressive force thereon to prevent tensile stresses in the cylinder during pumping operations to prevent failure of the cylinder due to metal fatigue. A check valve between the cylinder and the reservoir permits high-pressure fluid to flow from the cylinder into the reservoir during pumping operations to maintain substantially the maximum cylinder pressure within the reservoir. The cylinder further includes therein an inlet with an associated check valve. Stationary seals in the pump use the high pressures in the cylinder and the reservoir for producing the sealing forces necessary to prevent leakage. The primary piston seal consists of a long, controlled clearance gap which permits a small leakage but has only minor contact and thereby low sliding stresses and a long life.

REFERENCES:
patent: 2075428 (1937-03-01), Dickson
patent: 2497300 (1950-02-01), Elliott
patent: 3087433 (1963-04-01), Cerveny
patent: 3306042 (1967-02-01), Crooks
patent: 3323467 (1967-06-01), Heintz
patent: 3338170 (1967-08-01), Swartz
patent: 4304531 (1981-12-01), Fisher
Jet Cutting Technology, Apr. 6-8, 1982, 6 pages.

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