Accumulator having a diaphragm or bladder with a metallized barrier film
US11028954B2 · kind B2 · utility
0Cited by
14References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2019 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Oct 16, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2307/732
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A diaphragm and a bladder for an accumulator each include a thermoplastic film formed in a dome or bulbous shape. A metallic vapor deposition layer is disposed on at least one side of the thermoplastic. Inner and outer rubber layers are adhered on opposite sides of the metallic coated film so that the metallized thermoplastic film provides a barrier film to effectively slow the permeation of a gas such as nitrogen through the diaphragm or bladder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.