F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 35/02 (2006.01) F16B 39/34 (2006.01)
Patent
CA 2603635
A fastener adapted to pass through aligned holes through workpieces is disclosed. The fastener includes a pin member having a transition portion wherein the diameter of the transition portion decreases radially as it extends from the smooth cylindrical shank portion to the threaded portion. The fastener may also comprise a sleeve member and a clamping means. The clamping means includes a collar, a nut, or any other possible clamping means. In exemplary embodiments, the workpieces can be formed with a plurality of materials, the materials including composite, metallic, or composite/metallic structures, any combination thereof. In particular embodiments, the fastener has interference capability of 0.0005 to 0.0100 inches in composite structures without risk of composite delamination or damage. As a result of the fastener interference, gaps between the fastener and the structure are eliminated thereby providing good electrical conductivity between components. As a result, the potential for electrical sparks is reduced, providing a safer fastener for use with aerospace applications.
Attache pouvant traverser des trous alignés dans des pièces à travailler. Cette attache comprend un axe muni d'une partie intermédiaire dont le diamètre diminue progressivement de la queue d'outil cylindrique lisse à la partie filetée. Cette attache peut aussi comprendre un manchon et des dispositifs de serrage. Ceux-ci comprennent une bague, un écrou ou un autre dispositif de serrage. Dans une application exemplaire, les pièces à travailler peuvent être composées de plusieurs matériaux, y compris des structures composites, des structures métalliques, des structures composites et métalliques ou une combinaison de celles-ci. Dans certaines applications, l'attache a une capacité d'obstruction de 0,0005 à 0,0100 po dans les structures composites et ne présente aucun risque de délaminage ou de dommage du matériau. Grâce à la capacité d'obstruction de l'attache, on élimine les écarts entre l'attache et la structure, améliorant ainsi la conductivité électrique entre les composants. On réduit donc le risque d'étincelles, obtenant ainsi une attache plus sécuritaire pour les applications aérospatiales.
Arciniega Oviedo
March Michael U.
Alcoa Global Fasteners Inc.
Barrigar Intellectual Property Law
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