Rock-breaking implement for percussive machines
CA 1105000 A · Owner: Institut Gornogo Dela Sibirskogo Otdelenia Akademii Nauk Sssr · Inventors: Tupitsyn, Sergei K.; Varnello, Eduard P.; Kamensky, Veniamin V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rock-breaking implement preferably for a self-pro, pelled percussive machine for driving boreholes having a, body, at least a part of the body facing the borehole faces being cylindrical in shape. The body is provided with rock- -breaking wedges which are arranged in such a manner that their blades extend radially at the end face of said body. The body has grooves opening outside to the periphery of the body and designed to remove broken rock said grooves, extending along helical lines and intersecting one another so that portions of the body located between the intersecting grooves define said rock-breaking wedges. Edges of said wedges which extend on the periphery of the body within the …
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 July 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 1998.
- 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.