Wall fastener
US4765788A · kind A · utility
18Cited by
11References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Jan 9, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B15/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved wall fastener for hollow walls, the fastener having two spreadable anchoring blades designed to spread behind the wall following insertion of a screw thereinbetween. The fastener is made of thin sheet metal which has been hardened through a heat treating process, such as quenching. Complementary engaging means on the blades are used to hold the blades together during the heat treatment and to prevent the separation thereof until the screw insertion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.