Reciprocating hydraulic pump

Details Reciprocating hydraulic pump Reciprocating hydraulic pump

1991-07-08

1992-12-01

Bertsch, Richard A.

Pumps

Expansible chamber type

Pumping member position controlled port

417495, 417554, F04B 704

Patent

active

051674955

ABSTRACT:
A hydraulic pump comprises at least one reciprocating piston (2) sliding in a stationary cylinder (4), a non-return suction valve (12) arranged between a source of fluid under low pressure and a working chamber (10) defined in the cylinder (4), and a first non-return delivery valve (16) arranged between the working chamber (10) and an outlet chamber (14) for the fluid under high pressure. A conduit (24) connects the outlet chamber (14) and the working chamber (10), the piston (2) leaving this conduit (24) open at the end of the suction period and at the start of the delivery period and closing it during the rest of the cycle.

REFERENCES:
patent: 2081056 (1937-05-01), Loweke
patent: 2193020 (1940-03-01), Collins
patent: 2230622 (1971-02-01), L'Orange
patent: 2696788 (1954-12-01), Funston
patent: 3058455 (1962-10-01), Hofer
patent: 3357363 (1967-12-01), Raymond
patent: 3578881 (1971-05-01), Mowbray
patent: 4792096 (1988-12-01), Gregory

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