Expansion dowel
US4289062A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1979 |
| Grant date | Sep 15, 1981 |
| Priority date | — |
| Expiry date | Apr 27, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/908
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An expansion dowel for insertion through an opening in a structural member into a hollow space within the structural member, is formed of a shaft portion, a pair of expansion arms connected to the shaft portion and a pair of webs, each joined to one of the expansion arms and connected to one another. In the inserting position, the expansion arms and webs are folded inwardly and extend along the projection of the axis of the shaft portion. When the dowel is displaced into the expansion position, the expansion arms extend approximately perpendicularly to the axis of the shaft portion and each web is disposed at an acute angle to the expansion arm to which it is joined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.