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Expired Canadian patentCanada

Method and apparatus for dividing and uniting the flows of high-consistency fibre suspensions

CA 1280337 C · Owner: Ahlstrom Machinery Oy · Inventors: Niskanen, Toivo; Reponen, Voitto

CIPO record

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Abstract From the Canadian patent

A method and an apparatus for dividing and uniting flows of high-consistency fibre suspensions. To prevent clogging of the distributor the fibre suspension is caused to flow into a space uniting the inlet and the outlet flows, where a turbulent flow extending to the valves regulating the discharge flow created. The distributor comprises a vortex chamber provided with an inlet and outlets and with regulating valves connected to the outlets and disposed at a short distance from the outlets. According to a preferred embodiment of the the invention, a rotor provided with vanes is disposed in the vortex chamber,

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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 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 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.
FiledJanuary 24, 1986
GrantedFebruary 19, 1991
Term endedFebruary 19, 2008
Patent numberCA 1280337 C
Classification (IPC)D21F1/02 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedJan 24, 1986Patent grantedFeb 19, 1991Term endedFeb 19, 2008

Sources & verification

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