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one-sided fasteners

A fastener and inclined surface technology, applied in the direction of threaded fasteners, locking fasteners, connecting components, etc., can solve the problems of increasing the weight of the fasteners, increasing the blind side protrusion, etc.

Active Publication Date: 2021-05-14
MONOGRAM AEROSPACE FASTENERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Composi-Lok IIa ® fasteners include changes to the nose angle of the nut and also change the length of the sleeve, both of which increase the blind side protrusion, which also increases fastener weight

Method used

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Examples

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Embodiment Construction

[0023] Reference will now be made to certain embodiments, and specific language will be used to describe the same. It will be understood, however, that no limitation of the scope of the disclosure and claims is thereby intended, and that such variations, other adaptations, and other applications of the principles described herein are contemplated to be within the skill of the art to which the disclosure pertains staff normally think. In several figures where identical or similar elements are present, those elements are marked with identical or similar reference numerals.

[0024] see Figure 1A , a prior art Composi-Lok 3® fastener is shown as fastener 50. Fastener 50 includes nut 60 , bolt 70 , sleeve 80 and drive nut 90 . The nut 60 includes a tapered end 62 and a head 64 and the bolt 70 includes a breaking groove 72 . Sleeve 80 includes a recess 82 that retains an insert 84 and defines a deformable portion 86 .

[0025] see Figure 1B , the fastener 50 is shown in the ...

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PUM

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Abstract

This invention relates to blind fasteners. Specifically, a fastener is disclosed comprising a nut with a threaded bore, the nut comprising a head at one end, a cylindrical outer surface and a tapered bevel at the other end; a bolt comprising a head, The portion of the thread that engages the threaded opening, the recess next to the head of the thread, and the enlarged shank between the thread and the recess, where the outer diameter of the recess is smaller than the major diameter of the threaded opening of the nut, and where the outer diameter of the shank greater than the major diameter of the bolt threads; and a sleeve with an unthreaded opening positioned between the tapered ramp and the bolt head, with one end crimped into the recess so that the crimped sleeve opening has a smaller inside diameter than the The major diameter of the thread.

Description

technical field [0001] The present disclosure relates to blind fasteners having a large bearing surface on the blind side of a structure after installation. Background technique [0002] Composi-Lok® fasteners sold by Monogram Aerospace Fasteners (Applicant) have been in use for over 30 years. Composi-Lok ® fasteners are single face fasteners that provide a large blind side expansion that distributes the bearing load over a large area, which has proven useful in modern aircraft manufacturing where composite layups are widely utilized. Composite laminates are capable of withstanding high loads, but can experience delamination when fastened with some conventional fasteners that do not adequately distribute the bearing load. By providing a large blind side expansion, the Composi-Lok® fastener distributes the load over a large area, overcoming damage to the composite. The characteristic large blind side load area or "footprint" allows the fastener to impart high clamping loads...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B35/04F16B31/00F16B37/00F16B39/282
CPCF16B31/00F16B35/048F16B37/00F16B39/282F16B5/04F16B19/1054F16B19/1072F16B19/1063
Inventor E.库恩茨E.K.塔马施罗J.米契尔
Owner MONOGRAM AEROSPACE FASTENERS
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