Puffer-type gas-blast circuit-interrupter having variable-area stationary composite piston structure
CA 1072158 A · Owner: Westinghouse Electric Corporation · Inventors: Rostron, Joseph R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
45,674, PUFFER-TYPE GAS-BLAST CIRCUIT- INTERRUPTER HAVING VARIABLE-AREA, STATIONARY COMPOSITE PISTON STRUCTURE ABSTRACT OF THE DISCLOSURE, A puffer-type gas-blast circuit-interrupter is provided having an operating cylinder movable over a fixed composite piston structure, the fixed composite piston structure providing a variable cross-sectional area by means of a secondary piston area, preferably annular in configuration which is releasably latched in a fixed forward position and, subsequently, during the opening operation of the breaker, collapsed to a retracted position. The composite piston arrangement may be such that upon collapse of the secondary "fixed" piston the diameter, of the …
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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 February 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 1997.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.