Fluid friction vehicle heaters
CA 2230462 A1 · Owner: Ban, Takashi · Inventors: Takenaka, Kenji; Hoshino, Nobuaki; Moroi, Takahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A viscous fluid type heater includes a heating chamber for holding viscous fluid and a rotor located in the heating chamber. A holding chamber is located below the heating chamber to communicate with the heating chamber. A plunger which is actuated by a solenoid, is movable between a forward position for maximizing the volume of the holding chamber and a rearward position for minimizing the volume of the holding chamber. When the plunger is at the forward position, viscous fluid is discharged from the heating chamber to the holding chamber. When the plunger is at the rearward position, viscous fluid is supplied from the holding chamber to the heating chamber. This allows the load of the …
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.