Battery for orthopedic drive assembly
CA 1281374 C · Owner: Minnesota Mining And Manufacturing Company · Inventors: Palensky, Frederick J.; Mongeon, Douglas R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cordless rechargeable replaceable battery assembly powered drive assembly including a motor for driving orthopedic surgical instruments in which the battery has silver and zinc oxide electrodes in sodium hydroxide electrolyte to provide low voltage high current power. The battery cells are vented through a porous polymeric curtain to restrict expulsion of electrolyte, a two speed transmission is provided to change drive speeds and a brush, holder on the motor has contacts adapted to be connected in different combinations to change the motor rotation direction.
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 March 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 12, 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.