Heat generator
CA 2314558 C · Owner: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho · Inventors: Hoshino, Tatsuyuki; Suzuki, Shigeru; Niwa, Masami
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a heat generator of the invention in which a drive shaft 8 is made of an iron-type metal a rotor 9, includes a main rotor body 9a made of an aluminum-type metal for shearing a silicone oil SO and a bush 9b made of an iron-type metal inserted in the main rotor body 9a and secured to the drive shaft 8 while being positioned in contact with the inner race 7a of a bearing device 7. The main rotor body 9a has at least a gap .DELTA. relative to the inner race 7a of the bearing device 7 and is, permitted to undergo thermal expansion.
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 20, 2000 and granted August 26, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2022.
- 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.