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Expired Canadian patentCanada

Auger-fed sawdust burner with revolving hopper

CA 1190803 A · Owner: Messersmith, Gailyn · Inventors: Messersmith, Gailyn

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 furnace for burning particulate fuels such as, sawdust and the like, and which includes a rotating auger mounted in a rotating cylindrical hopper for feeding the sawdust to a sawdust burner. The hopper is rotatably mounted in a position adjacent a sawdust burner which is located in a housing to form a furnace enclosure. The auger is rotatably mounted in a fixedly mounted conveyor tube which is axially mounted through the hopper. Power means is provided for rotating the auger and the hopper. The hopper has an opening enclosed by a door for inserting sawdust. The hopper has paddles for agitating the sawdust and dropping it onto an open upper side of the auger which then conveys it onto a …

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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 July 23, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 20, 1981
GrantedJuly 23, 1985
Term endedJuly 23, 2002
Patent numberCA 1190803 A
Classification (IPC)F23K3/14 +1 more

Timeline

Timeline From CIPO dates

1982198519881991199419972000Application filedMay 20, 1981Patent grantedJuly 23, 1985Term endedJuly 23, 2002

Sources & verification

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