Global Patent Index - EP 3502785 B1

EP 3502785 B1 20200812 - HAIRSPRING FOR CLOCK MOVEMENT AND METHOD FOR MANUFACTURING SAME

Title (en)

HAIRSPRING FOR CLOCK MOVEMENT AND METHOD FOR MANUFACTURING SAME

Title (de)

SPIRALFEDER FÜR UHRWERK, UND IHR HERSTELLUNGSVERFAHREN

Title (fr)

RESSORT SPIRAL POUR MOUVEMENT D'HORLOGERIE ET SON PROCÉDÉ DE FABRICATION

Publication

EP 3502785 B1 20200812 (FR)

Application

EP 17209682 A 20171221

Priority

EP 17209682 A 20171221

Abstract (en)

[origin: CN109946945A] The present invention relates to a spiral spring for balance wheel of niobium and titanium alloy with an essentially single-phase structure, and a manufacturing method which comprises: a step of producing a blank in a niobium-based alloy consisting of: niobium: balance at 100% by weight, titanium: between 40 and 49% by weight, trace elements selected from the group consisting of O, H, C, Fe, Ta, N, Ni, Si, Cu, Al between 0 and 1600 ppm by weight individually, with a total of less than 0.3% by weight, a step of type beta quenching of said blank to a given diameter, so that the titanium of the alloy based on niobium is essentially in the form of a solid solution with niobium in the beta-phase, the alpha-phase titanium content being less than or equal to 10% by volume, at least one step of deforming the said alternating alloy with at least one heat treatment step , the number of stages of heat treatment and d formation being limited so that the resulting niobium-based alloy retains a structure in which the titanium of the niobium-based alloy is substantially in the form of a solid solution with niobium in the beta-phase, the alpha-phase titanium content being less than or equal to 10%by volume and has a yield strength greater than or equal to 600 MPa and a modulus of elasticity of less than or equal to 100 GPa, a step of strapping to form the spiral spring being performed beforethe last step heat treatment.

IPC 8 full level

G04B 17/06 (2006.01); C22C 14/00 (2006.01); C22C 27/02 (2006.01)

CPC (source: EP US)

C22C 27/02 (2013.01 - EP US); C22F 1/00 (2013.01 - EP US); C22F 1/18 (2013.01 - EP US); G04B 17/06 (2013.01 - US); G04B 17/066 (2013.01 - EP US); C22C 14/00 (2013.01 - EP US)

Citation (examination)

Citation (opposition)

Opponent : e-Patent SA

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Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 3502785 A1 20190626; EP 3502785 B1 20200812; CN 109946945 A 20190628; CN 109946945 B 20210420; JP 2019113528 A 20190711; JP 2020187134 A 20201119; JP 2024016031 A 20240206; JP 6764915 B2 20201007; JP 7515678 B2 20240712; RU 2696327 C1 20190801; US 11586146 B2 20230221; US 11966198 B2 20240423; US 2019196405 A1 20190627; US 2023088320 A1 20230323

DOCDB simple family (application)

EP 17209682 A 20171221; CN 201811412811 A 20181123; JP 2018204827 A 20181031; JP 2020130704 A 20200731; JP 2023175743 A 20231011; RU 2018144937 A 20181218; US 201816143764 A 20180927; US 202218060228 A 20221130