Bladder type fluid accumulator for hydraulic system

Details Bladder type fluid accumulator for hydraulic system Bladder type fluid accumulator for hydraulic system

1986-08-01

1987-12-22

Phillips, Charles E.

Pipes and tubular conduits

With pressure compensators

Variable capacity chambers

200 83L, F16L 5504

Patent

active

047140933

ABSTRACT:
A gas-pressurized collapsible bladder inside a fluid accumulator in a hydraulic system has a detection device that informs a user about the state of inflation of the bladder. Abnormalities in system operation, e.g., a gas leak from the collapsible bladder or sudden turning on of the fluid-actuated device in the system can cause bladder deflation whereas clogging of lines or sudden stoppage of a fluid-actuated device may cause fluid pressure rise in the system, and hence, deflation of the collapsible bladder to actuate the detection device. In one aspect of the invention, the condition of the bladder is detected by use of a permanent magnet that actuates a reed relay. In another aspect of the invention, a light-emitting diode, a reflector and a photosensor detect the bladder condition.

REFERENCES:
patent: 2444352 (1948-06-01), Hoffman et al.
patent: 3206572 (1965-09-01), Buehler
patent: 3654956 (1972-04-01), Tsubouchi
patent: 3741692 (1973-06-01), Rupp
patent: 3859619 (1975-01-01), Ishihara et al.
patent: 4014213 (1977-03-01), Parquet
patent: 4107494 (1978-08-01), Tuegel
patent: 4487226 (1984-12-01), Chun

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