Quarter-turn detent twistlock

F - Mech Eng,Light,Heat,Weapons – 16 – B

Patent

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24/58

F16B 21/08 (2006.01) A44B 99/00 (2010.01) A45C 13/12 (2006.01) F16B 21/02 (2006.01)

Patent

CA 2009054

A twistlock fastener is constructed of a latching member and a base member. The base member has a socket portion with a square-shaped internal bore. The latching member is formed with head portion and a shank portion. The shank portion has a cylindrical section adjacent to the head portion and has a pair of resilient bifurcated leg elements integrally formed with the cylindrical section. Each of the leg elements have a radial surface to provide a latching shoulder. Each latching lateral shoulder is formed with a width sufficient to retain the shank portion in the square-shaped internal bore. Each of the opposite side surfaces at the opposite ends of the latching shoulder for both leg elements lie in a common flat plane which is perpendicular to the latching shoulders. The surface on each of the leg elements that extends axially from and adjacent to each latching shoulder is flat, and the corner surfaces along each of the leg elements adjacent to each of the opposite side surfaces are rounded along the length of the leg elements.

Verrou tournant constitué d'un élément de verrouillage et d'un élément de base. L'élément de base possède un emboîtement présentant un alésage interne en carré. L'élément de verrouillage comprend une tête et une tige. La tige possède une section cylindrique qui est adjacente à la tête, ainsi qu'une paire de pattes bifurquées et résilientes formées intégralement avec la section cylindrique. Chacune des pattes présente une surface radiale fournissant un épaulement de verrouillage. Chaque épaulement latéral de verrouillage est de largeur suffisante pour retenir la tige dans l'alésage en carré. Chacune des surfaces latérales opposées aux extrémités opposées de l'épaulement de verrouillage des deux pattes repose en un plan plat commun qui est perpendiculaire aux épaulements de verrouillage. La surface de chacune des pattes s'étendant axialement depuis chacun des épaulements, et qui sont adjacentes à ceux-ci, est plane. Les surfaces de coin le long de chacune de ces pattes adjacentes à chacune des surfaces latérales opposées sont arrondies sur la longueur des pattes.

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