Cooling system
CA 2106052 C · Owner: Jones, Robert H. · Inventors: Jones, Robert H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cooling system for an electric motor is designed to be mounted on an end of the electric motor. The cooling system includes an independently powered electric motor which is designed as an inverted induction motor in which a, ring-shaped rotor rotates about an annular stator. The annular shape of the stator provides a cavity into (and/or through) which the shaft of the electric motor can protrude. The ring shaped rotor is supported and maintained in place about the stator by a bearing-mounted fan.
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 September 13, 1993 and granted August 19, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 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.