B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
29/19
B23B 31/12 (2006.01) B23B 31/22 (2006.01)
Patent
CA 1290929
ABSTRACT A self-gradually locking chuck for drills or similar devices particularly suitable for portable drills used in surgery. It includes a cylindrical sleeve which can be coaxially fixed to a rotating shaft, a ferrule having a conical section provided internally with lobes, a cylindrical portion at one or its ends for engagement with said sleeve and a cylindrical portion at the other end. A mounting, perforated longitudinally by a hole, includes a central body having locking jaws which are movable in holes in a direction convergent upon the axis of the chuck, an anterior portion and a posterior portion opposite to said central body. Biasing means and a centering device are provided. A cylindrical ferrule is threaded to a part of the anterior portion of the mounting as it projects from the first-mentioned ferrule. The mounting moves axially in relation to the first-mentioned ferrule and to the cylindrical sleeve; Retaining devices are provided for releasably securing the first-mentioned ferrule to the cylindrical ferrule and the posterior portion of the mounting to the sleeve. In a second embodiment or the chuck the ferrule having a conical section moves axially in relation to the cilindrical sleeve and to the mounting.
548102
Aldegheri Roberto
Brivio Lodovico Renzi
de Bastiani Giovanni
Faccioli Giovanni
Marks & Clerk
Orthofix S.r.l.
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