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Expired Canadian patentCanada

Drive system for automatic washer

CA 1301469 C · Owner: Bottas, Michael John · Inventors: Burk, Jeffrey Lee; Bottas, Michael John

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 system for an automatic washer includes a high slip motor connected to a drive reduction mechanism for driving an energy absorbing agitator preferably having flexible vanes. The high slip motor is driven with spaced alternating pulses so that the agitator accelerates in one direction and then slows after the end of the pulse followed by acceleration and then slowing in a second direction so that sinusoidal agitation is produced by a pulse input to the motor.

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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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
  • 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 11, 1988
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301469 C
Classification (IPC)D06F17/08 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJan 11, 1988Patent grantedMay 26, 1992Term endedMay 26, 2009

Sources & verification

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