Method of securing an anchor with extrusion plastic molding in a solid wall substrate
US5161296A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1991 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Jul 30, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49966
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method and an anchoring element for high strength solid wall anchoring in which a solid plastic plug is inserted in a hole in a solid wall of a porous material such as concrete. The invention provides a high strength compressive bonding between the plastic plug and the wall which simulates high strength chemical bonding. In order to effect the high strength compressive bonding, the plug is inserted into a hole in the wall having nominally the same dimension as the plug. A screw of substantially the same diameter as the plastic plug is inserted into the plug to provide the anchoring. The plastic of the plug is an extrudible material such as polypropylene, high density polyethylene and co-polymers, which is extruded against and into the solid wall of the hole by the rotary insertion of the screw. Continued rotation of the screw causes a very high compression of the plastic between adjacent threads of the screw and a thin, very highly compressed film, which substantially covers the threads. The extrusion and the highly compressed areas of plastic provide phenomenally high resistance to pull-out of the plug from the wall. The plastic plug further contains one or more hairline separat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.