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Expired Canadian patentCanada

Combined loader self-leveling implement tilt linkages for effecting true level and enhanced roll back and dump characteristics throughout lift range of loader

CA 2173396 C · Owner: Oka, Ken Kengi · Inventors: Friesen, Henry; Oka, Ken Kengi

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 front-end loader includes a pair of loader arms and features a parallelogram-shaped plate assembly associated with each arm and having first and second corners respectively pivotally mounted to the forward end of a respective loader arm and to an implement carrier holder and having third and fourth corners respectively pivotally coupled to leveling and tilt linkage assemblies. A tilt cylinder is mounted between the tilt linkage assembly and the parallelogram-shaped plate assembly. The parallelogram-shaped plate assembly serves to transfer leveling linkage and tilt cylinder inputs to an implement carrier holder coupled to a mounting bracket at the rear side of a bucket.

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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

  • Filed April 3, 1996 and granted July 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2018.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 3, 1996
GrantedJuly 6, 1999
Term endedApril 3, 2016
Patent numberCA 2173396 C
Classification (IPC)E02F3/34 +1 more

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedApril 3, 1996Patent grantedJuly 6, 1999Term endedApril 3, 2016

Sources & verification

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