Rock anchor
CA 1295155 C · Owner: Gd-Anker Gmbh · Inventors: Gruber, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rock anchor consists of a body member formed as a drilling rod, which at one end carries a drill-head and has externally over its whole length a coarse thread for example, an approximately round thread. The drill-head is welded to the drilling-rod. The drilling-rod has only at its forward region, that is adjacent the drill-head peripheral bores whereby the aforesaid forward region, from the drill-head extend over a length of at most 20 cm. The bores extend as an angle to the axis of the drilling rod, namely from inside to, outside in a direction from the drill-head. This rock anchor serves simultaneously for making a drilling whereby the, tubular body member serves for the supply of the …
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 February 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 4, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.