Combination drilling and dressing bit
CA 1285403 C · Owner: Riley, Arthur D. · Inventors: Riley, Arthur D.; Defries, Rene F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure The bit (1, 101, 201) includes a pointed tapered drill portion (10, 110, 210) with cutting edges (14 114, 214), an abrasive frustoconical grinder portion (20 120, 220), and an abrasive cylindrical reamer portion (30. 130 230). The drill portion (10, 110, 210) produces a hole. The grinder portion (20, 120, 220) grinds and enlarges the hole. The reamer portion (30, 130, 230) finishes the hole. The drill portion (10 110, 210) is carried by a shaft (12, 112 212) that is received into an axial opening (40 140, 240) through the grinder and reamer portions (20 30, 120, 130, 220, 230). The drill portion (10) and grinder portion (20) may form a substantially continuous …
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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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2008.
- 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.