Drill blade with slot for removing cut materials
CA 2371454 A1 · Owner: Ykk Corporation Of America · Inventors: Ishikawa, Kiichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drill bit has an annular cutting edge to form a hole in a workpiece. The drill bit is, received within a drill and rotated above 20,000 revolutions per minute. A distal end of the drill, bit defines an annular edge surrounding a hollow cavity. The annular edge both cuts and melts the, workpiece during formation of the hole. The drill bit also defines an exit hole passing, perpendicular to an axial center of the drill bit. The exit hole and the hollow cavity join within an, interior of the drill bit to form a material passage way. Core material cut from the workpiece is, collected within the hollow area of the drill bit during operation. Rotational forces of the drill bit, eject the …
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
- Filed February 11, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 11, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2024.
- 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.