Gas-impermeable elastic membrane and hydropneumatic accumulator equipped with this membrane
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United States of America Patent
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May 9, 2000
Grant Date -
N/A
app pub date -
Feb 17, 1998
filing date -
Feb 17, 1997
priority date (Note) -
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Abstract
Hydropneumatic accumulator of the type comprising a sphere having an internal cavity subdivided into two chambers, one chamber containing a gas and the other a liquid. The subdivision is accomplished by an elastic impermeable membrane for the gas and liquid, the membrane being formed and comprising a copolymeric impermeable film including OH groups, and being impermeable to gas, two layers between which the film is incorporated and including an elastic material of a copolymer having blocks of polyamides and blocks of polyethers and a rubber coating of elastic material positioned on at least one of the layers.
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