Strap with articulated links
AssigneeRolex SA
InventorJames Rejzner
Life of this patent
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Abstract
Said strap with articulated links, in particular for a watch, comprises at least three adjacent rows of links offset from one adjacent row to another, in which at least one friction surface (3, 13, 23-163) of each joint is made of a material of which the hardness is >800 HV. Said bearing surface (3, 13, 23-163) is in contact with at least one joint element (5, 15, 25-165) having at least one friction surface made of a second material selected from the following materials: ceramic, ceramic-metal composite, amorphous carbon, stainless steel without nickel, cobalt alloy, gold or gold alloy, platinum or platinum alloy, platinoid or platinoid alloy, titanium or titanium alloy, capable of reducing the frictional wear with the friction surface (3, 13, 23-163).
Claims18
Strap with articulated links for a watch, comprising:
- at least three adjacent longitudinal rows of links offset longitudinally from one adjacent row to another, said links comprising transverse passages,
- connecting rods received in said transverse passages so that said rows of links are connected and positioned by said connecting rods.
- said strap comprising joints, wherein each joint comprises:
- (i) friction surfaces with axial guidance and
- (ii) friction surfaces with lateral guidance,
- wherein all the friction surfaces of each joint consist of a pair of materials formed from a first material having a hardness of more than 800 HV and a second material selected from the following materials:
- ceramic, ceramic-metal composite, amorphous carbon, stainless steel without nickel, cobalt alloy, gold, gold alloy, platinum, platinum alloy, platinoid, platinoid alloys, titanium, titanium alloy,
- each of the pairs of materials making it possible to reduce substantially the wear between said friction surfaces relative to any other pair of materials.
Dependencies are inferred from the claim text.