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Expired Canadian patentCanada

Fan drive fluid circulation apparatus

CA 1049356 A · Owner: Wallace Murray Corporation · Inventors: Maci, Raymond 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

A shear liquid fan drive assembly for radiator cooling system of an internal combustion engine of the type wherein a temperature responsive valve controls the degree of rotary coupling between the engine and a radiator cooling fan by controlling the quantity of shear liquid between a driving disc and a driven housing carrying the fan. The specific improvement relates to a modification for redirecting flow of shear liquid to inhibit breakdown of the shear liquid due to overheating.

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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 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 27, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedFebruary 27, 1979
Term endedFebruary 27, 1996
Patent numberCA 1049356 A
Classification (IPC)F01P7/02 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedFeb 27, 1979Term endedFeb 27, 1996

Sources & verification

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