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US 2018/0046141 A1Published application
Device for winding a timepiece movement
AssigneeRolex SA
InventorsSergio de Almeida Graça, Vannina Linck
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Abstract
A component of a winding device, in particular an automatic winding device, of a timepiece movement, wherein it is made of austenitic stainless steel and wherein it comprises at least one friction surface hardened by carbon or nitrogen type atoms introduced into the austenitic stainless steel over a predetermined depth.
Claims21
A winding device of a timepiece movement, comprising:
- two metal components that cooperate through an interface that is subjected to friction,
- wherein at least one of the two metal components is an austenitic stainless steel component, comprising at least one friction surface hardened by carbon or nitrogen type atoms introduced into the austenitic stainless steel over a predetermined depth.
Dependencies are inferred from the claim text.