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Expired Canadian patentCanada

Toggle link trip mechanism

CA 1109721 A · Owner: Plow King Industries, Inc. · Inventors: Geurts, Cletus J.

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

An earthworking unit having a toggle trip mechanism for holding an earthworking tool in an earthworking position and allowing the tool to move upwardly to a release position. The toggle trip mechanism has a pair of links pivotally connected with an eccentric pin. One link is connected to a pivoting mount held in a normal position with a flexure bar. The other link is connected to a standard carrying the earthworking tool. A control arm connected to the pin and a control rod is operable to rotate the eccentric pin 91 to adjust the overall length of the toggle links.

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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 September 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 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.
FiledSeptember 4, 1979
GrantedSeptember 29, 1981
Term endedSeptember 29, 1998
Patent numberCA 1109721 A
Classification (IPC)A01B61/04

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedSep 4, 1979Patent grantedSep 29, 1981Term endedSep 29, 1998

Sources & verification

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