Gas-impermeable elastic membrane and hydropneumatic accumulator equipped with this membrane
US6058976A · kind A · utility
7Cited by
6References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 17, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Feb 17, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2201/32
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.