Electromagnetic re-draw sleeve actuator
CA 2091570 C · Owner: Stuart, Keith O. · Inventors: Stuart, Keith O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A linear electromagnetic actuator (22, 22') has its core (26; 26') mounted to a can body forming apparatus (10) and its coil (28) attached to re-draw sleeve (14) of such apparatus (10). The actuator (22 22') provides for the axial movement of the re-draw sleeve (14) between its fully retracted position and its fully extended position. The re-draw sleeve (14) and the coil are coaxially mounted to each other so that the force exerted on the re-draw sleeve (14) is also coaxial. Once the re-draw sleeve is in its fully extended position, an electromagnet (142) is turned,on so that the re-draw sleeve (14) exerts the requisite force on the can material preform (17). The electromagnet (142) is …
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 July 15, 1992 and granted November 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 2014.
- 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.