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US 7,622,178 B2Granted
Metallic doubler repair of composite arcuate flanges
AssigneeUnited Technologies Corporation
InventorsWilliam F. Bogue, Christopher J. Hertel, Brian K. Holland
Life of this patent
Estimating the term…
Abstract
An assembly includes a composite flange, an insert, an adhesive and a support. The composite flange has at least one damaged aperture. The insert is positioned in the damaged aperture and extends therefrom to provide compressive load transfer through the composite flange. The adhesive is positioned directly on at least a portion of the composite flange proximate the damaged aperture. The support is positioned over the adhesive and contacts the insert.
Claims21
An assembly comprising:
- a bolt;
- a composite flange having at least one damaged bolt hole with a crack extending from the bolt hole to an outer edge of the composite flange;
- an insert positioned in the damaged bolt hole and extending therefrom, the insert adapted to receive the bolt to provide for compressive load transfer through the composite flange and thereby minimize application of compressive load produced by the bolt on the composite flange;
- an adhesive accommodating of thermal expansion differences positioned on at least a portion of the composite flange proximate the damaged bolt hole;
- and
- a support positioned over the adhesive and contacting the insert.
3 more elements
An assembly comprising:
- a bolt;
- a thermoplastic structure having at least one damaged bolt hole with a crack extending from the bolt hole to an outer edge of the thermoplastic structure;
- an insert positioned in the damaged bolt hole and extending therefrom, the insert adapted to receive the bolt to provide for compressive load transfer through the thermoplastic structure and thereby minimizing application of compressive load produced by the bolt on the thermoplastic structure;
- an adhesive accommodating of thermal expansion differences that is stable in harsh environments and is positioned on the thermoplastic structure;
- and
- an overlapping support positioned on the expandable adhesive and contacting the insert.
3 more elements
A repair assembly comprising:
- a plurality of bolts;
- a composite flange having first plurality of bolt holes at least one of which is a damaged bolt hole with a crack extending from the bolt hole to an outer edge of the composite flange;
- a support positioned over a surface of the composite flange and having a second plurality of bolt holes which align with the first plurality of bolt holes in the composite flange including the damaged bolt hole;
- a plurality of inserts disposed in the first plurality of bolt holes and contacting the support, the inserts adapted to receive the bolts to provide for compressive load transfer through the composite flange which minimizes application of compressive load produced by the bolts on the composite flange;
- and
- an adhesive accommodating of thermal expansion differences positioned on at least a portion of the composite flange proximate the first plurality of bolt holes to bond the support to the composite flange.
3 more elements
Dependencies are inferred from the claim text.