An improved hole-saw assembly

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 51/04 (2006.01) B27B 33/08 (2006.01) B27B 33/18 (2006.01)

Patent

CA 2460989

A hole-saw assembly including a hole-saw having at one end a plurality of cutting teeth and at the other end two shafts. The assembly includes a mandrel coaxially aligned with said hole-saw and including a body having two bores therethrough coaxially aligned with said shafts. An annulus located on top of the body is coaxially aligned with said mandrel and hole saw and includes two holes, the annulus rotatable around its longitudinal axis from a first to a second position. In the first position the annulus holes are aligned with the bores and shafts allowing the shafts to be freely insertable and removable and in the second position the holes are misaligned to lock the shafts to the annulus. Such an arrangement allows the hole-saw and the mandrel to be easily and quickly mountable and demountable.

L'invention concerne un système de scie trépan comprenant une scie trépan qui présente à une extrémité, une pluralité de dents coupantes et à l'autre extrémité, deux tiges. Ledit système comprend un mandrin aligné dans le sens coaxial avec ladite scie trépan et comprenant un corps comportant deux trous traversants alignés dans le sens coaxial avec lesdites tiges. Une couronne circulaire située au sommet du corps est alignée dans le sens coaxial avec le mandrin et la scie trépan et comporte deux trous, ladite couronne circulaire passant d'une première à une seconde position, par rotation autour de son axe longitudinal. En première position, les trous de la couronne circulaire sont alignés avec les trous et les tiges, ce qui permet aux tiges d'être insérées et sorties librement et en seconde position, les trous sont décalés pour bloquer les tiges contre la couronne circulaire. Une telle configuration permet de monter et de démonter aisément et rapidement la scie trépan et le mandrin.

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