Indexable insert drill
CA 1094849 A · Owner: Valeron Corporation (The) · Inventors: Zweekly, Raymond T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An indexable insert drill with a parallelogram shaped insert positioned at a negative axial lead the insert having, a slanted recess which provides an angularly oriented cutting edge extending from a face cutting corner through or slightly under and substantially beyond the drill axis and a unique, notch in the cutting edge providing chip interruption and stabilized lead.
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 February 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 3, 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.