A clamping chuck for tool inserts, in particular for screw drivers
CA 2131179 A1 · Owner: Helfer & Co. Kg · Inventors: Hornung, Ewald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A clamping chuck for tool inserts in particular for screw drivers, The invention relates to a screw driver according to the precharacterising clause of Claim 1. In order to simplify such a clamping chuck and thus to reduce the manufacturing costs to a minimum and to increase the durability of said chuck, with the clamping chuck having the features of the precharacterising clause of Claim 1 it is proposed in accordance with the invention to provide at, the end of the female part close to the screw driver the, seat for a compression spring, which acts on a disk-like member through which the screw driver passes so that during, the relaxation of the compression spring it is tilted with respect …
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 March 6, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2015.
- 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.