Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Plural – independent – serially acting re-entry means
Reexamination Certificate
2007-03-06
2007-03-06
Look, Edward K. (Department: 3745)
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Plural, independent, serially acting re-entry means
C415S057400, C415S058500, C415S058700
Reexamination Certificate
active
10471859
ABSTRACT:
A recirculation structure for turbo-compressors has an annular chamber that is positioned in the area of the free blade ends of a rotating blade ring and that radially borders the main flow channel, and has a multitude of guide vanes arranged in the annular chamber and distributed around its circumference. The annular chamber enables the passage of air flow in the forward and/or rear areas, and the guide vanes are firmly fixed to at least one wall of the annular chamber and otherwise are designed to be free-standing. The tips of the guide vanes that face the annular chamber extend along and/or near the contour of the main flow channel, and axially overlap the free blade ends or axially border the area of the free blade ends.
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German Office Action dated Aug. 23, 2004, with English translation.
English translation of previously filed German Office Action date Mar. 3, 2004.
English translation and copy of previously filed German Office Action dated Feb. 20, 2003.
German office action dated Mar. 3, 2004.
Crowell & Moring LLP
Look Edward K.
MTU Aero Engines GmbH
Wiehe Nathan
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