Patent ID: 9244432
Filing Date: 2016-01-26
CPC Classification: G04B

Claim Text:
1. A shockproof timepiece wheel for driving a component having unbalance relative to a pivot axis of said wheel, said wheel includes, on the one hand, an arbour for pivotally guiding the wheel about said pivot axis, and on the other hand, a drive means arranged or assembled on a flange of said wheel, said wheel including at least one flexible element between said arbour and said flange, wherein said flange includes a cylindrical shoulder cooperating in abutment for centring purposes with a complementary cylindrical shoulder comprised in said arbour to ensure the perfect concentricity of said drive means with said arbour, and wherein said flexible element is either confined between said flange and a locking washer held on said arbour or snapped onto said flange and/or said arbour, and wherein said flexible element includes bosses arranged, in normal operation, to transmit a drive torque between said arbour and said flange, and, in the event of any shock, to absorb the torsion between said arbour and said flange, to dissipate part of the energy from said shock by friction to modify the effect on said drive means of the amplitude and the duration of said shock by reducing the amplitude and increasing the duration thereof, and to form an elastic return means returning said flange to a position of realignment relative to said arbour after said shock.