Apparatus for grinding twist drills
CA 1236697 A · Owner: Intermedium Ag · Inventors: Wurscher, Raimund A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for grinding twist drills comprises a drive shaft and a grinding wheel, which is coupled to said shaft and is mounted thereon to be axially movable relative to the shaft and is spring-loaded toward a drill-guiding structure facing the grinding surface of the grinding wheel. The drill-guiding structure comprises guiding passages for guiding drills differing in diameter against the grinding surface and in association with each guiding passage comprises at least one guide lug for extending into a flute of the twist drill extending through the associated guiding passage, and a drill stop for limiting the advance of the twist drill in the guiding passage against the elastically …
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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 May 17, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2005.
- 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.