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Expired Canadian patentCanada

Internal combustion engine rocker arm arrangement having a readily replaceable plate spring

CA 1182011 A · Owner: Nissan Motor Co. Ltd. · Inventors: Honma, Masayuki

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 plate spring is formed to have a "spider-like" configuration with pairs of bent "spider leg-like" flexible fingers. The spring is fixed to the top of a rocker arm shaft mounting bracket so that each pair of fingers straddles the rocker arm shaft and biasingly contacts a lateral surface of a rocker arm pivotally mounted on said shaft. The fingers have a length adequate to allow for mass production tolerances while simultaneously biasing the rocker arm uniformly along the rocker arm shaft preventing any unwanted uneven wearing of the shaft or rocker arm. The spring may be replaced simply by removing a single bolt.

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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 February 5, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 2, 1981
GrantedFebruary 5, 1985
Term endedFebruary 5, 2002
Patent numberCA 1182011 A
Classification (IPC)F01L1/18 +1 more

Timeline

Timeline From CIPO dates

1982198519881991199419972000Application filedMarch 2, 1981Patent grantedFeb 5, 1985Term endedFeb 5, 2002

Sources & verification

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