Button bit grinding system
CA 1333334 C · Owner: Manqvist, Kallevi Keijo · Inventors: Sjolander, Robert; Manqvist, Kallevi Keijo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to an automated device for automatically grinding button bits for the kind of bits used mainly in drilling of underground mines quarries, blast holes, and water wells etc. In the prior art the grinding of button bits of mining and drilling equipment has been performed manually. This manual handling is time consuming and as it requires little skill is inefficient and wasteful. The present invention seeks to overcome the disadvantages by providing an automated device for grinding button drill bits.
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 December 6, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 6, 2011.
- 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.