Device for breaking rocks and the like without explosives
CA 2409464 A1 · Owner: China, Ferruccio I. · Inventors: China, Ferruccio I.; China, Carlo B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The Rock Breaker Tool fits snuggly into the cores hole and Hardened Inserts expand, outward exerting tremendous force on the wall of the hole to break the rock or concrete. When the rock or concrete breaks. the breaking action is a gentle "burst" without flying, debris and loud exploding noises. This Rock Breaker Tool can be set-up in a series of units, spaced approximately 24 to 36 inches apart to bring an entire rock face down in quarries, and/or can be used as a single unit to break oversized rock or concrete into smaller pieces. This Tool can also be used to break up concrete walls or slabs in city limits where, explosives cannot be used.
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 October 22, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2024.
- 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.