With means for re-entry of working fluid to blade set (e.g., re-entry type device, passage, etc.) > Plural, independent, serially acting re-entry means > Having additional blade set in re-entry path > Patents

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Class Information
Number: 415/57.2
Name: Rotary kinetic fluid motors or pumps > With means for re-entry of working fluid to blade set (e.g., re-entry type device, passage, etc.) > Plural, independent, serially acting re-entry means > Having additional blade set in re-entry path
Description: Device comprising a second blade* row which contacts the working fluid* after the first blade or blade row but before one of the reentry means has directed the working fluid back to the first blade or blade row.

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7600961	Fluid transfer controllers having a rotor assembly with multiple sets of rotor blades arranged in proximity and about the same hub component and further having barrier components configured to	Oct. 13, 2009
6494673	Turbine engine	Dec. 17, 2002
6361270	Centrifugal pump for a gas turbine engine	Mar. 26, 2002
6004093	Portable air-blowing working machine	Dec. 21, 1999
4167854	Torque converter with internally reversible turbine shaft	Sep. 18, 1979