Friction rock stabilizer and a method of isolating the same from a bore surface
CA 1164230 A · Owner: Ingersoll-Rand Company · Inventors: Larson, John A.; Chaiko, Walter M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of isolating the outer surface of a friction rock stabilizer, in a closed-end earth structure bore from, the surface of the bore. The method comprises interposing only a single lining, of pre-formed, plastic sheet material, which lining has a smooth low-friction surface, between at, least a portion of the surface of the bore and the stabilizer. The interposing step comprises disposing the smooth low-, friction surface in direct, contacting and only a slidable engagement with the outer surface of the stabilizer to facilitate a relative slidable movement between the surfaces.
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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
- Granted March 27, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2001.
- 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.