Method and device for installing a self-drilling expandable rock bolt and a self-drilling expandable rock bolt
CA 2542261 C · Owner: Kanflod, Morgan · Inventors: Kanflod, Morgan; Oeberg, Fredrik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method and a device for installing in a rock wall or roof, a self-, drilling expandable rock bolt (2) having a drill bit portion (5) an expansion , portion (9) and a connecting portion (10) in a rock breaking step, the self-, drilling rock bolt (2) is provided with a rock breaking movement and flushing fluid for producing a bore hole, and in an expansion step pressurized , expansion fluid is introduced into the expansion portion (9) in order to expand it so as to be fixed to the inside of the bore hole. Expansion fluid is introduced by means of a swiveling device (6) so that the rock bolt (2) is free to move during the rock breaking step and be tightened against the rock , bolt (2) …
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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
- Filed October 20, 2004 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 20, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.