Hydraulic device especially a hydropneumatic accumulator

Details Hydraulic device especially a hydropneumatic accumulator Hydraulic device especially a hydropneumatic accumulator

1981-01-28

1983-03-01

Bryant, III, James E.

Pipes and tubular conduits

With pressure compensators

Variable capacity chambers

138 26, F16L 5504

Patent

active

043752276

ABSTRACT:
A hydraulic device, such as a hydropneumatic piston accumulator, having a freely displaceable piston which divides the cylinder into a liquid chambers and a gas chamber on opposite sides of the piston. In order to reduce the friction of the piston seals and the heat produced thereby and at the same time guarantee an effective sealing the piston during its initial or terminal movement close to its end position cooperates with a second sealing member at the end wall of the liquid chamber through a first sealing member, and between these sealing members a friction seal is arranged for preventing back flow of liquid from the liquid chamber to the inlet at the end wall but in flow of liquid in the opposite direction in additional the first sealing member is axially displaceable in relation to the piston to a limited extent.

REFERENCES:
patent: 2742978 (1956-04-01), Peterson et al.
patent: 3043340 (1962-07-01), Rehbock
patent: 3893486 (1975-07-01), Meyer
patent: 3907001 (1975-09-01), Vanderlaan et al.
patent: 4000758 (1977-01-01), Meisenheimer

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