B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
B23B 31/117 (2006.01)
Patent
CA 2493219
A chuck (10) for retaining the shank of a tool bit or accessory, having a fixed diameter, inserted in a central channel (42) at a distal end of said chuck (10), comprising at least one torsion spring (14) mounted axially within a housing (12) and having an inner dimension and shape comparable to said shank's outer dimension and shape, and mechanical means (32a, 32b, 34) for winding and unwinding said torsion spring to respectively grip or release said shank, said winding being in a rotational direction consistent with a normal operating rotational direction of said chuck such that said shank (10) tends to further wind said torsion spring (14) for further self-tightening in normal operation.
L'invention concerne un mandrin qui permet de retenir la tige d'un outil rapporté ou d'un accessoire, présente un diamètre fixe, et est inséré dans un canal central à une extrémité distale dudit mandrin, et comprend au moins un ressort de torsion monté dans le sens axial dans un logement et possédant une dimension et une forme internes comparables à la dimension et à la forme externes dudit mandrin, ainsi que des moyens mécaniques permettant d'enrouler et de dérouler ledit ressort de torsion afin de respectivement saisir ou libérer le mandrin, cet enroulement étant dans un sens de rotation qui correspond à un sens de rotation de fonctionnement normal du mandrin afin que ce dernier enroule davantage le ressort de torsion de manière à se resserrer davantage en fonctionnement normal.
Allan Scott W.
Hasan Maz A.
Singh Satnam
Vasudeva Kailash C.
Armstrong R. Craig
Maxtech Manufacturing Inc.
Team Fair Holdings Limited
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