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Expired Canadian patentCanada

Cylinder specific piston clearance minimizing system for multicylinder compressors

CA 1311457 C · Owner: Tecumseh Products Company · Inventors: Fry, Emanuel D.

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

A compressor cylinder head assembly for a compressor which has a crankcase and a plurality of cylinders disposed in the crankcase. Each valve plate is spaced from the cylinder head by a valve plate gasket which is selected to have a thickness to provide the proper amount of clearance between the top of the piston and the valve plate to thereby keep the cylinder clearance in a predetermined range.

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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 15, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 2009.
  • 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 13, 1987
GrantedDecember 15, 1992
Term endedDecember 15, 2009
Patent numberCA 1311457 C
Classification (IPC)B23P15/00 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJan 13, 1987Patent grantedDec 15, 1992Term endedDec 15, 2009

Sources & verification

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