Over-center hollow wall anchor with enhanced holding strength
US4993901A · kind A · utility
6Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1990 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Feb 26, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B13/0808
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A plastic over-center hollow wall anchor having increased strength without increase in thickness of load bearing members and necessitation of a larger insertion aperture. The bending motion stress on the load bearing arms, which causes the weakening or failure mode of the anchor, is substantially retarded by the inclusion of a small reinforcing boss across the bending area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.