Hydraulic pump with integrated sump and accumulator

Details Hydraulic pump with integrated sump and accumulator Hydraulic pump with integrated sump and accumulator

1987-05-22

1988-04-19

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

Responsive to accumulation of pumped liquid in receiver

417 44, 417307, F04B 4902

Patent

active

047385952

ABSTRACT:
A hydraulic pump assembly includes a housing having a bore, and a sump piston, a pump piston and an accumulator piston received coaxially within the bore. The pistons respectively define a sump chamber, a pump chamber, and an accumulator chamber within the housing. A motor reciprocates the pump piston to pump fluid fron the sump chamber into the accumulator chamber.

REFERENCES:
patent: 2802424 (1957-08-01), Lee
patent: 3143969 (1964-08-01), Eames et al.
patent: 3270634 (1966-09-01), Pasquali
patent: 3716306 (1973-02-01), Martin
patent: 3724972 (1973-04-01), Guetersloh
patent: 3832095 (1974-08-01), Akima
patent: 3834162 (1974-09-01), Keady
patent: 4371317 (1983-02-01), Heibel

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