Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Axially extending shroud ring or casing
Reexamination Certificate
2002-09-02
2008-09-30
Edgar, Richard (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Axially extending shroud ring or casing
C416S222000
Reexamination Certificate
active
07429164
ABSTRACT:
A turbine moving blade has a blade portion extending from the basal portion to the tip of the moving blade. The blade root portion is formed at the basal portion of the blade portion and engaged with a corresponding disk groove of a turbine rotor on a one-by-one basis, and the integral cover is formed at the tip of the blade portion integrally with the blade portion. The integral cover includes at least a pair of pressure and suction sloped surfaces inclined relative to the direction of the rotational axis of a turbine so as to restrain the elastic restoring force of the moving blade torsionally deformed at the time of installation of the moving blade by bringing the integral covers of mutually adjacent blades into contact.
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patent: 5829955 (1998-11-01), Saito et al.
patent: 6283713 (2001-09-01), Harvey et al.
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patent: 11-159302 (1999-06-01), None
Nuemann et al. article, “Thirty Years Experience with Integrally Shrouded Blades”; 1989; pp. 1-8.
Ikeuchi Kazuo
Machida Masato
Namura Kiyoshi
Saitou Eiji
Takasumi Masakazu
Edgar Richard
Hitachi , Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
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