Cyclically-operated hydraulic device particularly useful as a li

Details Cyclically-operated hydraulic device particularly useful as a li Cyclically-operated hydraulic device particularly useful as a li

1997-10-02

1999-11-23

Lee, Kevin

Fluid handling

Processes

13762414, 137211, F16K 5100

Patent

active

059881968

ABSTRACT:
A cyclically-operated hydraulic device includes: an air-liquid chamber which, during a first part of each cycle is partially filled with a liquid while air in the chamber is compressed, and during a second part of each cycle discharges under pressure a portion of said liquid from the chamber; and an air-replenishing device which inlets a small quantity of air into the air-liquid chamber during each cycle to replenish air contained in the liquid discharged under pressure.

REFERENCES:
patent: 3981319 (1976-09-01), Holt
patent: 4002184 (1977-01-01), Tubbs et al.
patent: 4949747 (1990-08-01), Rosenberg
patent: 5738136 (1998-04-01), Rosenberg

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