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US 9,250,610 B2Granted
Split collet with a non-circular opening
AssigneeRolex SA
InventorJerome Daout
Life of this patent
Estimating the term…
Abstract
A split collet in which the contour of the central opening that is intended to receive a balance staff is not circular. The collet is characterized in that the contour (3) of the central opening (2) comprises a limited number of supporting parts (4, 5, 12, 14, 15) intended to co-operate with the balance shaft, said number being greater than two.
Claims24
A split collet comprising:
- a central opening designed to receive a balance staff,
- wherein the central opening is noncircular,
- wherein a contour of the central opening comprises a limited number greater than two of bearing portions designed to interact with said balance staff, and
- wherein the contour of the central opening has substantially a symmetry of reflection that is orthogonal relative to a straight line passing through a split of the collet and through a center of the contour of the central opening, the straight line being parallel to a plane containing an upper face of the collet.
1 more element
A split collet comprising:
- a central opening designed to receive a balance staff,
- wherein the central opening is noncircular,
- wherein a contour of the central opening comprises a limited number greater than two of bearing portions designed to interact with said balance staff,
- wherein at least one of the bearing portions is situated on an arm, and
- wherein the bearing portions are configured so as to each define a precise point of contact with the balance staff.
2 more elements
Dependencies are inferred from the claim text.