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Expired Canadian patentCanada

Rotating piston machine

CA 1307744 C · Owner: Schukey, Jurgen · Inventors: Schukey, Jurgen

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 rotating piston machine has a casing with a shaft borne in the casing . In an annular space there are arranged rotating elements which bear in sealing manner against the walls of the annular space . Each rotating element has four outwardly extending sectorshaped vanes . The two rotating elements are arranged coaxially; their vanes engage in one another, so that in each case one vane of the one rotating element is arranged between two vanes of the other rotating element. By a cam track control it is achieved that, on rotation of the shaft , both rotating elements execute rotations with cyclic changes in the speed of rotation and the distances between the vanes The cam track control has in …

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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 September 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 2009.
  • 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 15, 1988
GrantedSeptember 22, 1992
Term endedSeptember 22, 2009
Patent numberCA 1307744 C
Classification (IPC)F01C1/06

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJan 15, 1988Patent grantedSep 22, 1992Term endedSep 22, 2009

Sources & verification

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