Combination accumulator and variable volume sump

Details Combination accumulator and variable volume sump Combination accumulator and variable volume sump

1987-06-25

1988-09-13

Garrett, Robert E.

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

60582, 138 31, F16L 5504

Patent

active

047699906

ABSTRACT:
The combination accumulator and variable volume sump (50) comprises a housing (52) having therein a stepped bore (56). An H-shaped piston and a U-shaped piston (60, 80) are diaposed within the stepped bore (56), the first piston comprising an accumulator piston (60) and defining with the housing (52) and stepped bore (56) a first chamber (70) containing therein pressurized medium. The second piston (80) defines with the housing (52) and stepped bore (56) a second chamber (90) containing therein pressurized fluid. Open ends of the U-shaped pistons (60, 80) are received one within another, and a spring (95) is disposed between interior openings (62, 82) of pistons (60, 80) to bias them apart. The housing (52) has a pair of openings (54, 59) for communicating pressurized fluid, one opening (54) communicating with the second chamber (90) and the other opening (59) communicating with the stepped bore (56) in order to communicate pressurized fluid to the first piston (60). Displacement of the first piston (60) along the stepped bore (56) results in a corresponding increased displacement of the second piston (80) relative to the housing (52).

REFERENCES:
patent: 2968320 (1961-01-01), Gratzmuller
patent: 3863676 (1975-02-01), Tarsha
patent: 3898808 (1975-08-01), Ewald et al.
patent: 4138846 (1979-02-01), Sakakibara
patent: 4351357 (1982-09-01), Orme
patent: 4471806 (1984-09-01), Strock
patent: 4651782 (1987-03-01), Fulmer
patent: 4685491 (1987-08-01), Fulmer et al.

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