Method of filling a borehole
CA 2087923 A1 · Owner: Multi Construction Chemicals (Proprietary) Limited · Inventors: Gouws, Johannes Jacobus; Clark, Lloyd Mclean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a grout gun for filling a rockbolt borehole with measured doses of grout. The grout gun includes a grout breech for accommodating a predetermined quantity of grout which is usually in the, form of a grout capsule. An elongate tubular barrel extends from the grout breech. Catalyst dosing means, comprising a catalyst dosing chamber communicating with the grout breech and a catalyst inlet pipe provide a, measured dose of catalyst. A compressed air inlet communicates with the catalyst dosing chamber, and a manual trigger valve is provided for controlling the flow of compressed air through the inlet. The valve is operable to propel both the measured dose of the catalyst …
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
- Filed January 22, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2015.
- 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.