Patent Yard Sign in
Expired Canadian patentCanada

Two wing non-intermeshing rotors for increased performance for usein internal batch mixing machines

CA 1286657 C · Owner: Nortey, Narku O. · Inventors: Nortey, Narku O.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

Non-intermeshing two-wing rotors for use in high intensity mixing machines of the batch type provide new sequences and new characteristics of dynamic interactions for achieving advantageously increased mixing effectiveness, improved performance and productivity for such machines. These new rotors are adapted for driving at unequal speed (unsynchronized rotation) or at equal speed (synchronized rotation) and, thus they are adapted for retrofitting into existing mixing machines. The optimum results are achieved by turning the two rotors at synchronous speed with a phase angle relationship of about 180° between rotors as shown by various well-known performance criteria. These criteria are …

Read the whole patent

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, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 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.
FiledOctober 13, 1987
GrantedJuly 23, 1991
Term endedJuly 23, 2008
Patent numberCA 1286657 C
Classification (IPC)B29B7/18

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedOct 13, 1987Patent grantedJuly 23, 1991Term endedJuly 23, 2008

Sources & verification

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