Variable capacity type viscous heater
CA 2204649 C · Owner: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho · Inventors: Goto, Kunifumi; Ban, Takashi; Mori, Hidefumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
24, A variable capacity type viscous heater is provided which can carry out the capacity control reliably, and which can inhibit the endurable heat-generating efficiency of a viscous fluid from deteriorating even after a long period of service. For instance its rear housing 6 is provided with a control chamber 9 which is communicated with a central region of a heat-generating chamber 7 and which, has an internal volume capable of expanding and contracting. When a rotor 14 is kept rotated, a silicone oil held, in the heat-generating chamber 7 expands theinternal volume of the control chamber 9 by the Weissenberg effect in the capacity reduction. As a result, the heating is relieved because …
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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 5, 1996 and granted July 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2018.
- 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.