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公开(公告)号:US11592784B2
公开(公告)日:2023-02-28
申请号:US16713079
申请日:2019-12-13
Inventor: Jean-Jacques Born , Dominique Lechot , Yves Winkler , Christophe Vincent
IPC: G04B31/02 , G04B13/02 , G04B31/012
Abstract: A bearing for an arbor or staff of a rotary wheel set of a timepiece movement, the bearing including a bearing block provided with a housing and an endstone arranged inside the housing, the endstone having a main body provided with a cavity configured to receive a pivot of the arbor of the rotary wheel set, the pivot having the shape of a first cone having a first solid angle, the apex of the first cone being rounded with a predefined first radius of curvature in a range from 0.2 μm to 50 μm, the cavity having a second cone shape with a second solid angle, greater than the first solid angle, so that the pivot can rotate in the cavity, the apex of the second cone being rounded and having a predefined second radius of curvature. The second radius of curvature is smaller than the first radius of curvature.