Expansible plug for fixing to a solid or hollow building material
US5143497A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Aug 26, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B13/128
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The expansible plug for fixing an element or frame member on solid or hollow building material, has a plug shank (1) having a plurality of expansion discs (3,4) arranged one after the other along the plug shank (1). The expansion discs (3,4) are provided with eccentric bores (12,13) located so that, without the fixing screw (23) inserted, the bores (12,13) of adjacent discs (3,4) are noncoaxial or staggered with respect to one another and overlap one another and so that the overlapping bores (12,13) form a constricted screw hole (15) through the plug shank (1). When a fixing screw (23) is screwed into the expansible plug the expansion discs (3,4) are displaced laterally so that the bores (12,13) in the expansion disks have a coaxial relationship and the expansion disks (3,4) are displaced laterally outwards from the plug shank to secure the expansible plug in a hole in which it is located. The expansion discs (3,4) are preferably attached to joining members (9,10) on opposite sides of the plug shank and every second successive expansion disc (3,4) is attached to a common resilient joining member (9,10).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.