Global Patent Index - EP 3014362 A2

EP 3014362 A2 20160504 - TIMEPIECE SPRING MADE OF AUSTENITIC STAINLESS STEEL

Title (en)

TIMEPIECE SPRING MADE OF AUSTENITIC STAINLESS STEEL

Title (de)

UHRFEDER AUS AUSTENITISCHEM ROSTFREIEM STAHL

Title (fr)

RESSORT D'HORLOGERIE EN ACIER INOXYDABLE AUSTENITIQUE

Publication

EP 3014362 A2 20160504 (FR)

Application

EP 14711981 A 20140324

Priority

  • CH 11822013 A 20130627
  • EP 2014055858 W 20140324

Abstract (en)

[origin: WO2014206582A2] The invention relates to a timepiece spring (1) made of austenitic stainless alloy, steel comprising a base consisting of iron and chromium. The thickness thereof is smaller than 0.20 mm. Said spring comprises by weight: chromium having a minimum value of 15% and a maximum value of 25 %; manganese having a minimum value of 5% and a maximum value of 25 %; nitrogen having a minimum value of 0.10% and a maximum value of 0.90%; carbon having a minimum value of 0.10% and a maximum value of 1.00 %; the total of the contents by weight of carbon and of nitrogen as a proportion of the total is 0.40% to 1.50%; the (C/N) ratio of the content by weight of carbon as a proportion of the total relative to that of nitrogen is 0.125 to 0.550; impurities and added metals outside of iron having a minimum value of 0% and a maximum value of 12.0%; and iron having a value rounding out the 100 %. The invention is used with a barrel spring.

IPC 8 full level

G04B 1/14 (2006.01)

CPC (source: CH CN EP RU US)

C21D 6/002 (2013.01 - EP RU US); C21D 6/005 (2013.01 - EP RU US); C22C 38/001 (2013.01 - CH CN EP RU US); C22C 38/38 (2013.01 - CH CN EP RU US); C22C 38/44 (2013.01 - EP RU US); C22C 38/48 (2013.01 - EP RU US); C22C 38/58 (2013.01 - EP RU US); G04B 1/145 (2013.01 - CH CN EP RU US); G04C 5/005 (2013.01 - CH)

Citation (search report)

See references of WO 2014206582A2

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

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

DE 202014005288 U1 20140711; CH 708231 A2 20141231; CH 708231 B1 20170315; CH 708232 A2 20141231; CH 708232 B1 20180629; CN 105392910 A 20160309; CN 105392910 B 20190517; CN 204848989 U 20151209; EP 3014362 A2 20160504; FR 3007853 A1 20150102; FR 3007853 B1 20190816; HK 1222419 A1 20170630; JP 2016528377 A 20160915; JP 2018204112 A 20181227; RU 2016102576 A 20170801; RU 2635979 C2 20171117; US 10048649 B2 20180814; US 2016147195 A1 20160526; WO 2014206582 A2 20141231; WO 2014206582 A3 20151223

DOCDB simple family (application)

DE 202014005288 U 20140626; CH 11822013 A 20130627; CH 4452014 A 20140324; CN 201420353273 U 20140627; CN 201480036561 A 20140324; EP 14711981 A 20140324; EP 2014055858 W 20140324; FR 1401313 A 20140606; HK 16110595 A 20160906; JP 2016520320 A 20140324; JP 2018134739 A 20180718; RU 2016102576 A 20140324; US 201414896818 A 20140324