Rotary drill bit
CA 1203403 A · Owner: Ford Motor Company Of Canada, Limited · Inventors: Skidmore, Michael L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a rotary drill bit suitable for drilling fiber reinforced plastic, which drill bit comprises a spade drill head comprising a primary cutting edge; a disc-shaped base integral with and axially aligned with the drill head, having a diameter substantially equal to the width of the drill head wherein the radially outer edge of the rearward face of the base is of sufficiently small radius to form a fiber-cutting reverse cutting edge; a reduced diameter portion integral with and axially aligned with the base, having diameter substantially less than that of the base; and preferably, a shank integral with and axially aligned with the reduced diameter portion having diameter …
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 April 22, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 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.