Piston type accumulator for hydraulic system

Details Piston type accumulator for hydraulic system Piston type accumulator for hydraulic system

1990-01-09

1991-06-18

Kwon, John T.

Pipes and tubular conduits

With pressure compensators

Variable capacity chambers

92 5R, 91 1, 91DIG4, 138104, F16L 5504, F01B 2526

Patent

active

050242504

ABSTRACT:
A piston type accumulator has a detection device that informs a user about the position of the piston incorporated therein. Abnormalities in the hydraulic system operations e.g., a gas leak from a gas chamber bounded by the piston or the sudden turning on of a fluid-actuated device in the system, can cause an excessive movement of the piston; likewise, clogging of lines or the sudden stoppage of a fluid-actuated device may cause a fluid pressure rise in the system and, consequently, a displacement of the piston to actuate the detection device. In this invention, the position of the piston is detected by use of a permanent magnet that actuates a reed relay or moves a magnetic inductive indicator installed on the outside of a accumulator shell to be readily visible thereat.

REFERENCES:
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patent: 4207563 (1980-06-01), Soupal
patent: 4577663 (1986-03-01), Anderson et al.
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patent: 4691739 (1987-09-01), Gooden
patent: 4709653 (1987-01-01), Salomon
patent: 4714093 (1987-12-01), Kawano
patent: 4799048 (1989-01-01), Goshima et al.
patent: 4876945 (1989-10-01), Stoll et al.

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