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Single-sided fastener

A fastener, single-sided technology used in aircraft applications to solve problems such as spark ignition of fuel or any fuel vapors

Pending Publication Date: 2022-05-13
AIRBUS OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] If this arcing occurs in the fuel tank, there is a risk that the spark could ignite the fuel or any fuel vapors

Method used

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  • Single-sided fastener
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Examples of the invention described in the following discussion relate to blind fasteners. Each blind fastener according to the present invention has a bolt portion, a sleeve portion, and a tubular insulating sheath. The bolt portion is at least partially received within the sleeve portion. The first end of the sheath is retained on the bolt portion such that relative axial movement between the first end of the sheath and the bolt portion is substantially prevented. Each blind fastener is movable between a pre-installed configuration in which the sleeve portion has a first axial position relative to the bolt portion and a predetermined portion of the sheath in the pre-installed configuration. The segment is adjacent to the outer surface of the sleeve part, in the installed configuration, the sleeve part has a different second axial position relative to the bolt part, and the predetermined section of the sheath is adjacent to the inner surface of the sleeve part. adjac...

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PUM

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Abstract

The invention provides a single-sided fastener. The single-sided fastener includes a bolt portion, a sleeve portion, and a tubular insulating sheath. The bolt portion is at least partially received within the sleeve portion. The first end of the sheath is retained on the bolt portion such that relative axial movement between the first end of the sheath and the bolt portion is substantially prevented. The single-sided fastener is movable between a pre-installed configuration in which the sleeve portion has a first axial position relative to the bolt portion and a predetermined section of the jacket is adjacent an outer surface of the sleeve portion, and a post-installed configuration in which the predetermined section of the jacket is adjacent the outer surface of the sleeve portion. The sleeve portion has a different second axial position relative to the bolt portion, and a predetermined section of the jacket is adjacent an inner surface of the sleeve portion.

Description

technical field [0001] The present invention relates to blind fasteners, to fuel tanks fastened together by such blind fasteners, and to aircraft comprising such fuel tanks and / or blind fasteners. Background technique [0002] There is an increasing trend to manufacture aircraft structures from composite materials. In aircraft, composite structural members are typically fastened to each other and / or to metallic structural members using metallic fasteners. Composite materials used in aircraft structures are generally much less conductive than metals, at least under normal operation of the aircraft. If the current density exceeds the current carrying capacity of the joint between the composite structure and the metal fastener / structure, charges moving on and in the composite structure may transfer from the composite structure to the adjacent metal Fasteners or structural members arc. [0003] When lightning strikes such an aircraft, a large charge is placed on the composite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B37/00F16B35/02F16B5/02
CPCF16B37/00F16B35/02F16B5/02F16B19/1072B64D45/02F16B19/1036F16B29/00F16B5/0258F16B5/04F16B2200/93B64D37/32F16B33/004
Inventor 马修·韦布斯特安德鲁·费伊马修·克罗斯
Owner AIRBUS OPERATIONS GMBH