US2013156558A1PendingUtilityA1

Annular gas turbine engine case and method of manufacturing

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Assignee: PRATT & WHITNEY CANADAPriority: Oct 2, 2006Filed: Feb 14, 2013Published: Jun 20, 2013
Est. expiryOct 2, 2026(~0.2 yrs left)· nominal 20-yr term from priority
Inventors:Barry BarnettSteven HuntCzeslaw Wojtyczka
F05D 2250/232F05D 2230/232F05D 2250/231F01D 25/24F05D 2240/14F05D 2230/26Y02T50/60Y10T29/4932
46
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Claims

Abstract

The method is used for making an annular gas turbine engine case from a preform. The method comprises comprising flowforming at least one section of the preform, and then outwardly bending at least one portion of the perform.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . An annular gas turbine engine case comprising:
 at least one flowformed section; and   at least one outwardly bent portion at each distal end thereof.   
     
     
         2 . The annular case as defined in  claim 1 , wherein the outwardly bend portion is a flange. 
     
     
         3 . The annular case as defined in  claim 2 , wherein the case comprises at least one machined portion on each flange. 
     
     
         4 . The annular case as defined in  claim 3 , wherein the case is a fan case.

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