Hose inner layer formed of ECO blended with NBR/PVC
US10066766B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2017 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | May 25, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A hose includes an inner tube containing an alloy of NBR/PVC mixed with ECO, and the inner tube has a tube wall thickness of from 2 mm to 4 mm. A first reinforcement layer surrounds the inner tube, and includes a first yarn layer spiral wound over the inner tube in a first winding direction, as well as a second yarn layer spiral wound over the first yarn layer in a second winding direction opposite the first winding direction. A friction layer is disposed over the first reinforcement layer. A second reinforcement layer surrounds the friction layer, and includes a third yarn layer spiral wound over the friction layer in a third winding direction, and a fourth yarn layer spiral wound over the third yarn layer in a fourth winding direction opposite the third winding direction. A cover layer is disposed over the second reinforcement layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.