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Expired Canadian patentCanada

Captured radial key for steam turbine wheels

CA 1237370 A · Owner: General Electric Company · Inventors: Emeterio, Eloy V.; Klufas, Oleg; Deallenbach, Robert E.

CIPO record

Overview

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

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Abstract From the Canadian patent

Abstract of the Disclosure, In a steam turbine a device for keying, hubs of adjacent wheels together wherein the wheels are, not an integral part of the shaft of a rotor of the steam turbine and may be secured to the shaft by an interference shrink-fit at the surface of a bore through the hub of the wheel, comprises a substantially I-beam shaped key disposed in a keyway formed between adjacent hubs. A lip extends axially from the outer periphery of a pair of opposing end faces of adjacent hubs the, outboard surface of one lip of the pair of opposing end faces being in close proximity to the outboard lip of the other lip of the pair of opposing end faces. A respective pair of lands on each …

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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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 10, 1985
GrantedMay 31, 1988
Term endedMay 31, 2005
Patent numberCA 1237370 A
Classification (IPC)F01D5/00 +1 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedMay 10, 1985Patent grantedMay 31, 1988Term endedMay 31, 2005

Sources & verification

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