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Expired Canadian patentCanada

Internal combustion engine and operating cycle

CA 1209925 A · Owner: Kristiansen, Haakon H. · Inventors: Kristiansen, Haakon H.

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

49-, "INTERNAL COMBUSTION ENGINE AND OPERATING CYCLE" ABSTRACT OF THE DISCLOSURE, A cylindrical rotor is mounted for rotation in a stator and the rotor includes a plurality of cylindrical bores disposed annularly around the axis thereof which are generally parallel to the stator bore. Pistons reciprocate within these bores and connecting rods or links of the pistons engage within the profile of an annular cam secured to the stator so that as the rotor rotates, the pistons reciprocate due to the cam profile. The cycle can be of a diesel type with a fuel injection or of the gasoline/air mixture type with conventional spark plugs. Of importance, is the ease with which the expansion ratio can …

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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 August 19, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 6, 1980
GrantedAugust 19, 1986
Term endedAugust 19, 2003
Patent numberCA 1209925 A
Classification (IPC)F02B57/00 +2 more

Timeline

Timeline From CIPO dates

19811984198719901993199619992002Application filedMay 6, 1980Patent grantedAug 19, 1986Term endedAug 19, 2003

Sources & verification

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