Solid state motor starter
CA 2018329 C · Owner: Schaltenbrand, Robert W. · Inventors: Shepherd, Donald; Schaltenbrand, Robert W.; Seman, Brian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A solid state motor starter assembly having controlled semiconductors mounted between heat sink members. Electrical power to the assembly can be connected and disconnected by an electrically operated solenoid that actuates a movable contact into engagement with a stationary contact mounted on the incoming heat sink. To reduce the heat generated in the semiconductor device during steady state full voltage operation a, shunting current path is established between the adjacent heat sinks by an electrically operated solenoid which moves a movable contact bar to engage stationary contact surfaces mounted directly on the heat sinks. Electrically joining the incoming line heat sink to the outgoing …
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 June 5, 1990 and granted January 16, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2012.
- 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.