Viscous fluid heater
CA 2230466 A1 · Owner: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho · Inventors: Minami, Kazuhiko; Suzuki, Shigeru; Ban, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heater containing viscous fluid, which is sheared to generate heat. The heater is provided with an electromagnetic solenoid that includes a case a solenoid, coil housed in the case, and a core extending through the case. The heater further has a heating chamber and a sub-oil chamber. Viscous fluid is moved between the heating chamber and the sub-oil chamber through a communication bore. The core extends toward the communication bore. A coil spring urges the core toward the communication bore. Excitation of the electromagnetic solenoid moves the core away from the communication bore. The core opens and closes the communication bore and pumps the viscous fluid into the communication bore …
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 February 25, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 25, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2020.
- 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.