Expansion dowel assembly
CA 1237005 A · Owner: Hilti Aktiengesellschaft · Inventors: Herb, Armin; Froehlich, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An expansion dowel assembly includes an axially extending dowel and an expansion member. In the expansion step the, expansion member is axially displaced over a surface on the dowel to provide form-locking enlargement of the dowel assembly within a borehole. The surface of the dowel, over which the expansion member is displaced. is made up of two serially arranged frusto-conical surface sections. Each surface section is disposed at a different acute angle to the dowel axis.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.