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US 9,298,163 B2Granted
Timepiece wheel set with a unidirectional wheel
AssigneeETA SA Manufacture Horlogere Suisse
InventorCedric Decosterd
Life of this patent
Estimating the term…
Abstract
A timepiece wheel set with a unidirectional wheel including an arbor carrying a pinion and at least a first wheel that is coaxial with the pinion and pivotally mounted on the arbor. The first wheel is connected to the arbor by a first spring, which exerts a friction force on the first wheel. The wheel set also includes a second wheel pivotally mounted on the arbor, and connected to the arbor by a second spring, which exert a friction force on the second wheel.
Claims18
A timepiece wheel set, comprising:
- a unidirectional wheel including an arbor carrying a pinion;
- at least one first wheel that is coaxial with said pinion and pivotally mounted on said arbor, wherein said first wheel is connected to said arbor by a first spring, the first spring including an external coil in contact with a radially inward facing surface of the first wheel to apply a friction force to said first wheel, and the first spring including an internal part in contact with the arbor such that the first spring drives the arbor when the first spring is rotated by the first wheel in a locking direction of the first spring;
- and
- a second wheel pivotally mounted on said arbor and connected to said arbor by a second spring the second spring including an external coil in contact with a radially inward facing surface of the second wheel to apply a friction force to said second wheel, and the second spring including an internal part in contact with the arbor such that the second spring drives the arbor when the second spring is rotated by the second wheel in a locking direction of the second spring.
1 more element
Dependencies are inferred from the claim text.