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Expired Canadian patentCanada

Accelerator pump for carburetor

CA 1114253 A · Owner: Hitachi Ltd. · Inventors: Nakagawa, Tohru; Tamaki, Sigeo

CIPO record

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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 accelerator pump for a carburetor comprises a piston assembly located in a cylindrical well formed in a carburetor body, a link mechanism for actuating the piston assembly in response to movement of a throttle valve and, a tapered stopper. The piston assembly is separated from the link mechanism and engages with it only during acceleration. The tapered stopper is inserted in a hole made in said carburetor body, which hole is perpendicular to the cylindrical well, extending through a hole made in the piston assembly. A gap defined between the tapered stopper and the peripheral portion of the hole of the piston assembly determines the stroke of the piston …

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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, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 1998.
  • 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, 1979
GrantedDecember 15, 1981
Term endedDecember 15, 1998
Patent numberCA 1114253 A
Classification (IPC)F02M7/08

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJan 16, 1979Patent grantedDec 15, 1981Term endedDec 15, 1998

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