US2007201974A1PendingUtilityA1

Nested core gas turbine engine

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Individually held — no corporate assignee on recordPriority: Sep 5, 2000Filed: Mar 5, 2007Published: Aug 30, 2007
Est. expirySep 5, 2020(expired)· nominal 20-yr term from priority
Inventors:Sudarshan Paul Dev
F05D 2220/327F23R 3/38F02C 7/10F02C 3/067F02C 3/16F02C 3/145F05D 2220/328F02C 3/064F02K 3/00F02C 3/045F02C 3/10F05D 2220/90F05D 2220/323F02K 3/068F05D 2220/325F05D 2220/80F05D 2220/326Y02T50/60F05D 2220/324
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Claims

Abstract

A fan for creating lift or thrust having a fan hub and fan blades depending from the fan hub. The fan blades have slots formed therein with openings facing substantially aft, relative to a rotation direction of the fan blades, wherein air blowing from the fan hub into the fan blades and out of the openings of the slots contribute to the aerodynamic performance of the fan blades to enhance the aerodynamic performance of the fan blades.

Claims

exact text as granted — not AI-modified
1 . A fan for creating lift or thrust comprising a fan hub and fan blades depending from the fan hub, the fan blades having slots formed therein with openings facing substantially aft, relative to a rotation direction of the fan blades, wherein air blowing from the fan hub into the fan blades and out of the openings of the slots contribute to the aerodynamic performance of the fan blades to enhance the aerodynamic performance of the fan blades.  
   
   
       2 . The fan according to  claim 1 , wherein the air blowing out of the openings of the slots is at least in part exhaust from an engine.  
   
   
       3 . The fan according to  claim 2 , wherein the air blowing out of the openings of the slots is at least in part exhaust from a gas turbine engine.  
   
   
       4 . The fan according to  claim 3 , wherein the openings of the slots are located on an upper surface of the fan blades.

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