Self-gradually locking chuck
CA 1290929 C · Owner: Aldegheri, Roberto · Inventors: De Bastiani, Giovanni; Aldegheri, Roberto; Renzi Brivio, Lodovico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A self-gradually locking chuck for drills or similar devices particularly suitable for portable drills used in surgery. It includes a cylindrical sleeve which can be coaxially fixed to a rotating shaft a ferrule having a, conical section provided internally with lobes a cylindrical portion at one, or its ends for engagement with said sleeve and a cylindrical portion at the other end. A mounting, perforated longitudinally by a hole includes a, central body having locking jaws which are movable in holes in a direction convergent upon the axis of the chuck, an anterior portion and a posterior portion opposite to said central body. Biasing means and a centering device are provided. A …
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 October 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 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.