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Expired Canadian patentCanada

Kinetic engine control

CA 1189404 A · Owner: Hume, Douglas Wm. · Inventors: Hume, Douglas Wm.

CIPO record

Overview

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

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Abstract From the Canadian patent

An internal combustion engine in which the displacement in the cylinders is automatically varied to match the power output of the engine to power requirements. One or more kinetic controllers external to the cylinders connect engine piston cross-shafts to the engine crankshaft. Each kinetic controller is capable of changing its length through the use of damped elastic components. At high RPM the engine intake and power strokes are lengthened relative to that at low RPM as controller length increases. Also at high RPM the engine compression stroke is lengthened as controller length decreases. Thus, at higher engine RPM greater, fuel charge, higher compression and greater power are obtained …

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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 June 25, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 12, 1982
GrantedJune 25, 1985
Term endedJune 25, 2002
Patent numberCA 1189404 A
Classification (IPC)F02B75/04 +1 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedAug 12, 1982Patent grantedJune 25, 1985Term endedJune 25, 2002

Sources & verification

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