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Expired Canadian patentCanada

Governor device for internal combustion engine

CA 2129189 C · Owner: Takada, Yutaka · Inventors: Notsu, Ikurou; Miyata, Tatsuji; Takada, Yutaka

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

The present invention relates to a governor device for an internal combustion engine where a portion of the engine output is taken off as driving force for vehicle mounted accessory equipment which requires constant speed rotation with changes in load. By controlling the intake air quantity passing through a bypass passage which bypasses a mixing device for mixing fuel and intake air at a predetermined ratio, controlling a sub-throttle valve provided in an intake passage in series with a main throttle valve and controlling a supply, quantity of auxiliary gas fuel so that a detected air-fuel ratio is constant the, engine output is increase/decrease controlled in spite of changes in load in …

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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

  • Filed July 29, 1994 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2014.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2016.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 29, 1994
GrantedApril 6, 1999
Term endedJuly 29, 2014
Patent numberCA 2129189 C
Classification (IPC)F02D31/00 +2 more

Timeline

Timeline From CIPO dates

1995199719992001200320052007200920112013Application filedJuly 29, 1994Patent grantedApril 6, 1999Term endedJuly 29, 2014

Sources & verification

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