Patent ID: 8800408
Filing Date: 2014-08-12
Classification: G04D

Abstract:
1. A tool system for the extraction of a watch bezel, including: (a) a holding body; (b) a bell-chuck, arranged to rest on the periphery of a bezel mounted on a middle part of a watch; (c) an expansion mechanism or a retraction mechanism, operable on the bell-chuck, wherein the holding body is arranged to cooperate with the expansion mechanism or the retraction mechanism; and (d) thrust means, mounted coaxially inside the bell-chuck and arranged to rest on a crystal driven into the middle part, wherein the thrust means exerts a sufficient thrust force on the crystal to displace the bell-chuck relative to the crystal, wherein the thrust means includes a support member that is arranged to press on a middle part of the crystal and includes a recess towards the centre thereof, so as to rest on a circle of larger diameter of the crystal in order to best distribute the thrust force, wherein the holding body includes an internal thread that cooperates with the threaded art of an arbour, wherein the support member is mounted at a first end of the arbour and wherein a second end of the arbour has an operating handle for exerting the thrust force on the crystal.