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Expired Canadian patentCanada

Apparatus for actuating a breakaway conveyor section

CA 1285237 C · Owner: Grosjean, Robert M. · Inventors: Grosjean, Robert M.

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 apparatus for actuating a breakaway conveyor section includes an actuating means positioned below a lower edge of a fire door adapted to move vertically downward along an outside wall of a building to close an opening. A breakaway conveyor section is pivotally connected to an end of a fixed conveyor section outside the building and extends adjacent to an end of a fixed conveyor section inside the building and extending into the opening in the wall. The actuating means includes an actuating plate positioned below a lower edge of the fire door and pivotally connected to a pair of generally vertically extending slides by a pair of lever arms. The slides are maintained in an upper position …

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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 June 25, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 4, 1988
GrantedJune 25, 1991
Term endedJune 25, 2008
Patent numberCA 1285237 C
Classification (IPC)B65G43/00

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedMarch 4, 1988Patent grantedJune 25, 1991Term endedJune 25, 2008

Sources & verification

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