Vacuum circuit interrupter having heat exchanger for temperature control
CA 1290797 C · Owner: Westinghouse Electric Corporation · Inventors: Milianowicz, Stanislaw Adam
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Overheating of the contacts and associated current-carrying parts of a vacuum type circuit breaker is prevented by fastening a U-shaped heat exchanger component of non-magnetic sheet metal to a protruding portion of the stem that is located at the top of the breaker bottle and is integral with the stationary contact. The U-shaped heat exchanger component is secured in inverted position on the stationary stem and the downwardly-extending skirts of the heat exchanger are slotted to provide a series of spaced ribs which form planar grid structures that allow ambient air to flow through the heat exchanger component and enhance its heat transfer characteristics. The heat exchanger component is …
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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
- Granted October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
- 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.