Vertical clutch device for timepiece
AssigneeChopard Manufacture SA
InventorKarl-Friedrich Scheufele
Life of this patent
Estimating the term…
Abstract
Clutch device for timepiece, comprising first and second coaxial rotary mobile parts (1, 2) able to take up a relative axial coupled position in which a rotation of the first mobile part (1) gives rise to a rotation of the second mobile part (2), and a relative axial uncoupled position in which a rotation of the first mobile part (1) does not give rise to a rotation of the second mobile part (2), characterised in that is also comprises a friction element of viscoelastic material (30) intercalated between the mobile parts (1, 2) in order to transmit the rotation of the first mobile part (1) in the coupled position to the second mobile part (2).
Claims14
A clutch device for a timepiece, comprising:
- first and second coaxial rotary mobile parts (1, 2) mounted on an axis (3) and able to take up a relative axial coupled position in which rotation of said first mobile part (1) causes rotation of said second mobile part (2) and a relative axial uncoupled position in which rotation of said first mobile part (1) does not cause rotation of said second mobile part (2);
- a clamp (20) moving said second mobile part axially relative to said first mobile part;
- said second mobile part comprising a pipe (11) surrounding said axis (3) and a member (10) surrounding and rigidly assembled to said pipe, said member (10) being actuable by said clamp (20);
- and
- a friction element of viscoelastic material (30) intercalated between said first and second mobile parts (1, 2) so as to transmit rotation of said first mobile part (1) to said second mobile part (2) in said coupled position, said friction element being housed partly in a cavity (31) defined by said pipe (11) and said member (10).
Dependencies are inferred from the claim text.