Device for imparting a rotary driving motion to tools
CA 2181181 C · Owner: Neubert, Heinz · Inventors: Wierspecker, Horst; Neubert, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The proposal is for a device on hand machine tools for the rotary drive of percussion and/or drilling tools having at least three locking sections and an axial lock uniformly distributed around the circumference of the tool spindle (11) and chuck (13) of a tool holder (10). The locking sections consist of axial recesses (17, 19, 21) on the tool spindle (11) running axially towards the spindle end and engaging axial projections (18 20, 22) around the circumference of the chuck (13). To prevent jerky overload, it is proposed to design the locking sections (21 22) in, the circumferential region opposite the axial lock in such a way that their recess (21) and projection (22) run as a chord to …
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 December 24, 1994 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 2016.
- 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.