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Expired Canadian patentCanada

Gas-turbine with link attachment of a sealing ring in a guide vane ring

CA 1292951 C · Owner: Abb Stal Ab · Inventors: Nordstrom, Karl-Johan; Torstenfelt, Ragnar

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 gas turbine with at least one fixed guide vane ring (1) with a sealing ring (3) cooperating with a sealing member on the turbine rotor (7), The sealing ring (3) is connected to the guide vane ring (1) through a number of links (19) which are suitably oriented in a substantially tangential direction. The attachment of the sealing ring (3) by means of the links (19) means a perfect centering of the sealing ring (3) relative to the rotor (7) when the guide vane ring (1) expands relative to the sealing ring (3). (Figure 3)

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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 December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 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.
FiledNovember 17, 1988
GrantedDecember 10, 1991
Term endedDecember 10, 2008
Patent numberCA 1292951 C
Classification (IPC)F02C7/28 +1 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedNov 17, 1988Patent grantedDec 10, 1991Term endedDec 10, 2008

Sources & verification

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