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Expired Canadian patentCanada

Piston for an internal combustion engine

CA 1092453 A · Owner: Cummins Engine Company, Inc. · Inventors: Wade, James A.; Belush, Richard

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

This disclosure deals with a reciprocating piston for an internal combustion engine, particularly for a diesel engine. The piston is made of a relatively high strength metal such as iron, and no more material is used than is necessary to withstand the thermal and mechanical loads encountered in use. A circular piston dome is supported by a support part which extends between the dome and a pair of piston pin bosses. The bosses also support arcuate side thrust pads. A ring hand is connected to the outer periphery of the dome by a connecting part which is relatively thin and flexible. The dome the ring band and the support part are generally symmetrical about the axis of the piston. 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 December 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 1997.
  • 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 17, 1976
GrantedDecember 30, 1980
Term endedDecember 30, 1997
Patent numberCA 1092453 A
Classification (IPC)F16J1/20

Timeline

Timeline From CIPO dates

1977198019831986198919921995Application filedMay 17, 1976Patent grantedDec 30, 1980Term endedDec 30, 1997

Sources & verification

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