Tightening screw

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

Patent

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Details

F16B 31/00 (2006.01)

Patent

CA 2125502

A tightening screw in which a rotating ring is rotatably held on a flange-ring, a screw member having female threads in the same pitch as the male threads of the bolt to be fitted, with the female thread diameter formed larger than the male thread diameter, is rotably held eccentrically so that some of female threads of the screw member may be engaged with the male threads preliminarily, and the flange is fixed at the time of tightening so that the rotating ring may revolve the screw member, and thereby the decelerated rotation created in the screw member produces a large tightening force to increase the torque.

Un écrou de serrage comportant un anneau tournant supporté dans une rondelle à collerette et un double élément taraudé dont les filets présentent le même pas que ceux du boulon à poser mais ont un diamètre supérieur à celui des filets de l'élément mâle. Ledit double élément taraudé est maintenu en position excentrée dans l'anneau tournant de sorte que le filetage mâle puisse s'engrener dans le filetage femelle. Au moment du serrage, la rondelle à collerette est fixe, de sorte que l'anneau peut tourner autour du double élément taraudé, ce qui ralentit la rotation de ce dernier et crée une force de serrage importante qui augmente le couple.

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