Impermeable elastic membrane
US5645922A · kind A · utility
7Cited by
1References
9Claims
0Family size
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Inventor
Key dates
| Filing date | Jan 12, 1994 |
| Grant date | Jul 8, 1997 |
| Priority date | — |
| Expiry date | Jan 12, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31909
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An impermeable elastic membrane for hydropneumatic accumulators is made from an impermeable film of completely hydrolyzed polyvinyl alcohol, with a high molecular weight, and plasticized, with protective layers on both sides of polyamide, ethylene vinyl alcohol, or ethylene vinyl acetate. The membrane may be used in the hydropneumatic suspension of an automobile. The film can be obtained by extrusion, by injection molding, or by pressure molding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.