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Expired Canadian patentCanada

Grinding mill drive arrangement

CA 1233344 A · Owner: Canadian General Electric Company Limited · Inventors: Shaver, Marvin B.; Stock, Norman A.

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 drive for a mill such as a heavy loaded grinding mill that rotates upon a rotational axis is provided by a motor driving two axially aligned spaced apart pinions that mesh with their respective ring gears positioned in spaced locations on the mill. The pinions are drivingly interconnected by a pair of vernier type couplings interconnected by a jack shaft so that the angular position of the two pinions may be accurately adjusted to balance the load carried by each of the pinions.

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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 March 1, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 1, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 21, 1985
GrantedMarch 1, 1988
Term endedMarch 1, 2005
Patent numberCA 1233344 A
Classification (IPC)F16H37/06 +1 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJune 21, 1985Patent grantedMarch 1, 1988Term endedMarch 1, 2005

Sources & verification

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