US2012237351A1PendingUtilityA1

Retention for bonded hollow fan blade cover

36
Individually held — no corporate assignee on recordPriority: Mar 17, 2011Filed: Mar 17, 2011Published: Sep 20, 2012
Est. expiryMar 17, 2031(~4.6 yrs left)· nominal 20-yr term from priority
Inventors:Michael A. Weisse
B64C 11/24F01D 5/147F01D 25/24F04D 29/324F01D 5/18
36
PatentIndex Score
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Cited by
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Claims

Abstract

A two part airfoil has a suction side, a pressure side, a rib extending from one of the pressure side or the second side, the rib having a groove therein, and a riblet extending from an other of the pressure side or the suction side, the riblet fitting within the groove.

Claims

exact text as granted — not AI-modified
1 . A two part airfoil comprising:
 a suction side,   a pressure side,   a rib extending from one of said pressure side or said second side, said rib having a groove therein, and   a riblet extending from an other of said pressure side or said suction side, said riblet fitting within said groove.   
     
     
         2 . The two part airfoil of  claim 1  further comprising:
 a glue disposed between said rib and said riblets wherein motion between said suction side and said pressure side is damped. 
 
     
     
         3 . The two part airfoil of  claim 2  wherein said glue is a urethane glue. 
     
     
         4 . The two part airfoil of  claim 1  wherein said groove is longitudinal. 
     
     
         5 . The two part airfoil of  claim 1  wherein one of said suction side and said pressure side has a trench adjacent an outer profile thereof and wherein an other of said suction side and said pressure side has a bead that fits in said trench. 
     
     
         6 . The two part airfoil of  claim 5  wherein said trench is adjacent a leading edge and a trailing edge of said airfoil. 
     
     
         7 . The two part airfoil of  claim 5  wherein said trench is adjacent a leading edge and a base of said airfoil. 
     
     
         8 . The two part airfoil of  claim 7  wherein a rib extends from said trench adjacent a base of said airfoil to said trench adjacent a leading edge of said airfoil. 
     
     
         9 . The two part airfoil of  claim 8  wherein said trench is adjacent a leading edge and a trailing edge of said airfoil. 
     
     
         10 . The two part airfoil of  claim 9  wherein a rib extends from said trench adjacent said leading edge to said trench adjacent said trailing edge. 
     
     
         11 . The two part airfoil of  claim 5  wherein said trench is in said pressure side. 
     
     
         12 . The two part airfoil of  claim 1  wherein said rib extends from said pressure side. 
     
     
         13 . The two part airfoil of  claim 1  wherein said riblet extends from said suction side. 
     
     
         14 . A two-part airfoil comprising:
 a suction side,   a pressure side,   a rib extending from one of said pressure side or said second side, said rib having a groove therein said groove having a first contour, and   a riblet extending from an other of said pressure side or said suction side, said riblet having a second contour fitting within said first contour of said groove such that an effect of tear and shear force affecting said suction side and said pressure side are lessened.   
     
     
         15 . The two-part airfoil of  claim 14  wherein said first contour and said second contour mate. 
     
     
         16 . The two-part airfoil of  claim 14  wherein said first contour and said second contour are rectangular. 
     
     
         17 . The two part airfoil of  claim 14  further comprising:
 a glue disposed between said first contour and said second contour wherein motion between said suction side and said pressure side is damped. 
 
     
     
         18 . The two part airfoil of  claim 17  wherein said glue is a urethane glue.

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