Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Vane or deflector
Reexamination Certificate
2007-10-31
2011-12-06
Nguyen, Ninh H (Department: 3745)
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Vane or deflector
C415S213100
Reexamination Certificate
active
08070431
ABSTRACT:
A retention pin for fastening retaining lugs of an outer sidewall, of a turbine nozzle, within a groove between a forward land and an aft land of a retaining ring. The retention pins fit through coaxial holes in the lug and the lands, securing the radial and circumferential location of the nozzles as well as allowing transitional motion. While maintaining limited contact with both the nozzles and the retaining ring they significantly reduce conductive heat transfer from the nozzle to the retaining ring. By positioning the nozzles, they also set the desired nozzle throat areas for targeted turbine performance. The pins have been designed such that the nozzle cannot disengage within the assembly due to the pin backing out of its nominal axial position, and the pin will not fail due to low cycle fatigue, creep, or yielding, all of which prevent nozzle fallout.
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Benjamin Edward D.
Harter Ariel K.
Humanchuk David J.
Snook Daniel D.
Dority & Manning P.A.
General Electric Company
Nguyen Ninh H
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