Friction rock stabilizers
CA 1061612 A · Owner: Scott, James J. · Inventors: Scott, James J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Friction rock stabilizers for anchoring a structure such as a roof or side wall of a mine shaft or other undergound opening, comprising a generally annular body having longitudinally extending edge portions which overlap one another circumferentially of the body and are relatively movable to permit substantial circumferential compression of the body. The body is circumferentially compressed for installation in a bore of diameter substantially smaller than the normal maximum outer diameter of the body whereby after such instal-, lation, the resilience of the body causes the body outer circumference to anchor by frictional engagement with the surrounding wall of the bore.
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 September 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 4, 1996.
- 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.