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US 5,516,257 AGranted
Aircraft fan containment structure restraint
AssigneeUnited Technologies Corporation
InventorsRobert F. Kasprow, Kurt M. Dembeck, Grant Eckfeldt
Life of this patent
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Abstract
Woven fiber ballistic fabric (22) of multiple layers surrounds an isogrid support structure (20). A cuff portion (38) has shorter warp threads than the major portion (3) and also is impregnated with epoxy resin. A diameter restrains the fabric from aft movement during a blade ejection event.
Claims9
An aircraft fan containment system for a turbofan engine having a rotating plurality of fan blades comprising:
- a cylindrical case surrounding said fan blades;
- a large diameter containment portion of said case throughout the major part of the length of said case;
- a reduced diameter neck restraint portion of said case at the forward end of said case;
- a multiple layer winding of ballistic fabric surrounding both said containment portion and said restraint portion of said case;
- said fabric having warped yarns extending circumferentially of said case;
- and
- said warped yarns in the portion of said winding surrounding said restraint portion being shorter than the warped yarns in the portion of said winding surrounding said containment portion at equal strain.
4 more elements
Dependencies are inferred from the claim text.