Tool for enlarging hole
CA 2257758 A1 · Owner: Emhart Inc. · Inventors: Freeman, Glenn D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tool for enlarging the size of an existing bore to a selected enlarged size. The tool has a drill sized to define the enlarged bore and a guide, having a cylindrical body sized so that the guide can be rotated in the existing bore. The guide and drill including cooperating structures for releasably interconnecting the guide and the drill with the guide and drill coaxially aligned whereby with the, guide releasable secured to the drill the guide can, be located within the original hole to guide the cutting action of the drill as it enlarges the original hole.
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 January 4, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 2021.
- 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.