Drill and a method of producing it
CA 1214055 A · Owner: Guhring Ohg · Inventors: Guhring, Knut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drill having a metal bit carrier on which a sintered metal bit is mounted. The bit has at least one enclosed helical cooling channel which continues in alignment into a corresponding cooling channel in the bit carrier The cooling channel in the bit carrier may be spiral or straight. It may run in a flight of the carrier or may be formed in the carrier made as a double creased tube. The bit may be single or double lipped with one or more cooling channels formed in it. The drill has great mechanical and thermal stability, and is not adversely affected by the system of cooling channels in the interior of the drill. Service life and cutting power of the drill can be increased. The geometry of …
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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 November 18, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 18, 2003.
- 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.