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Expired Canadian patentCanada

Steam purge of a piston/cylinder gap in a diesel engine

CA 1285837 C · Owner: General Electric Company · Inventors: Leonard, Gary L.; Correa, Sanjay M.

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

Abstract of the Disclosure, An improvement for a diesel engine uses a vapor to purge a gap between a piston and cylinder wall. The diesel engine includes at least one cylinder, a piston reciprocatingly mounted in the cylinder, and means for establishing a compression seal between the piston sidewall surface and cylinder wall surface. A chamber is disposed in the piston crown. Means are provided for conducting a liquid into the chamber and containing the liquid under pressure in the chamber. Further provided are means situated in the piston sidewall surface for conducting a vapor between the chamber and the gap between the piston and cylinder wall. In operation, a liquid such as water is …

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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 July 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 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.
FiledJanuary 16, 1987
GrantedJuly 9, 1991
Term endedJuly 9, 2008
Patent numberCA 1285837 C
Classification (IPC)F02F7/00 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJan 16, 1987Patent grantedJuly 9, 1991Term endedJuly 9, 2008

Sources & verification

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