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Expired Canadian patentCanada

Method and apparatus for preventing surge in a dynamic compressor

CA 1291737 C · Owner: Compressor Controls Corporation · Inventors: Mirsky, Saul; Reinke, Paul A.; Staroselsky, Naum

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Abstract From the Canadian patent

A method is disclosed for efficiently protecting dynamic compressors from surge under changing inlet conditions and in response to flow disturbances of varying size and speed. An antisurge control system based on this disclosed method will compute the relative proximity of the compressor operating point to its surge limit as a multi-variable parameter which is self-compensated for changes in gas composition, inlet temperature and pressure, compressor efficiency, guide-vane position and, rotational speed. A combination of adaptive closed- and open-loop control responses is used to maintain a margin of safety between the operating point and the surge limit. Both the safety margin and 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 November 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 5, 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.
FiledApril 12, 1989
GrantedNovember 5, 1991
Term endedNovember 5, 2008
Patent numberCA 1291737 C
Classification (IPC)F04D27/02

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedApril 12, 1989Patent grantedNov 5, 1991Term endedNov 5, 2008

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.