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Expired Canadian patentCanada

Gas turbine engine fuel control system

CA 1293131 C · Owner: Smith, Trevor S. · Inventors: Smith, Trevor S.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A gas turbine engine fuel control has spill valve responsive to an input control signal, for spilling fuel from a supply passage. A pressurising valve controls flow from the supply passage to the engine in, response to the pressure in the supply passage. A throttle valve in series with the pressurising valve maintains the pressure difference across the pressurising valve substantially constant. A selector valve is operable to shut both the pressurising valve and a shut-off element in the throttle valve.

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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 December 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 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.
FiledDecember 8, 1986
GrantedDecember 17, 1991
Term endedDecember 17, 2008
Patent numberCA 1293131 C
Classification (IPC)F02C9/36

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 8, 1986Patent grantedDec 17, 1991Term endedDec 17, 2008

Sources & verification

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