Engine preheaters
CA 1193159 A · Owner: Harwood (Ct) Limited · Inventors: Barcy, Michael F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improvements in or relating to engine preheaters ABSTRACT OF THE DISCLOSURE, An air heating device for the inlet air flow to an air-breathing internal combustion engine comprises a helically coiled electrical resistance in the air entry conduit and a rigid retaining member passing through the coils of resistance along its length. The member is securely fixed at both ends to opposite sides of the conduit structure and is spaced from the coils of the resistance so that these are fully exposed to the air flow. In the event of the coiled resistance breaking loose from its normal mountings the retaining member will hold it to ensure damage is not caused by the resistance reaching a combustion …
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 September 10, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 2002.
- 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.