Damper drive in heating appliance or the like
CA 1213002 A · Owner: Sharp Kabushiki Kaisha · Inventors: Nakanishi, Takao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heating appliance such as a hot-air circulating microwave oven has a shape memory alloy as a damper spring for operating a damper controlling the supply of air into a heating chamber. The damper spring is disposed in an air path inside a duct for delivering air from a cooling fan to both the heating chamber and a magnetron so that the damper spring is also cooled.
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
- Granted October 21, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 21, 2003.
- 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.