Reinforced opening
US4428317A · kind A · utility
1Cited by
4References
9Claims
0Family size
Inventors
Key dates
| Filing date | Aug 24, 1981 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Aug 24, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H9/067
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A reinforced opening for sail cloth, tarpaulins, tent material, awnings and the like sheet material comprising a bead surrounding the opening comprised of a rigid ring positioned about the opening and enfolded within material bounding the opening and a liner positioned within the enfolded ring folded symmetrically outward over the bead at opposite sides into clinching engagement with the surface of the material outwardly of the bead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.