EP 2286308 B1 20220504 - BARREL SPRING AND METHOD OF SHAPING IT
Title (en)
BARREL SPRING AND METHOD OF SHAPING IT
Title (de)
FEDER VON AMORPHEM METALL FÜR FEDERHAUS UND VERFAHREN ZUR IHRER FORMGEBUNG
Title (fr)
PROCÉDÉ POUR LA MISE EN FORME D'UN RESSORT DE BARILLET EN VERRE METALLIQUE
Publication
Application
Priority
- EP 08405153 A 20080610
- EP 08405192 A 20080804
- CH 2009000191 W 20090609
Abstract (en)
[origin: EP2133756A2] The mainspring is formed from a metallic glass monolithic ribbon, where thickness of the mainspring amounts approximately between 50 and 150 micrometers. Shape of the mainspring in a free state is defined by a radius of an nth turn in a wound state so that the mainspring, which is wound into Archimedean spiral, is stressed to the maximum bending stress over the entire length. The radius is produced by adding the radius of a barrel core with multiplication of a number of winding turns and the ribbon thickness.
IPC 8 full level
CPC (source: EP US)
G04B 1/145 (2013.01 - EP US)
Citation (examination)
- US 2007133355 A1 20070614 - HARA TATSUO [JP], et al
- EP 1296798 A1 20030402 - TRICO PRODUCTS COMPANY [US]
- US 3343573 A 19670926 - DILLON JOHN J
- CH 510283 A 19710331 - CITIZEN WATCH CO LTD [JP]
Designated contracting state (EPC)
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 SE SI SK TR
DOCDB simple family (publication)
EP 2133756 A2 20091216; EP 2133756 A3 20110413; EP 2133756 B1 20160720; CH 698962 A2 20091215; CH 698962 B1 20141031; CN 101604141 A 20091216; CN 101604141 B 20120627; CN 102057336 A 20110511; CN 102057336 B 20130703; EP 2286308 A1 20110223; EP 2286308 B1 20220504; EP 4092489 A1 20221123; JP 2009300439 A 20091224; JP 2011523066 A 20110804; JP 5518852 B2 20140611; JP 5656369 B2 20150121; US 2009303842 A1 20091210; US 2011072873 A1 20110331; US 8348496 B2 20130108; US 8720246 B2 20140513; WO 2010000081 A1 20100107
DOCDB simple family (application)
EP 09405089 A 20090527; CH 2009000191 W 20090609; CH 8092009 A 20090526; CN 200910159542 A 20090609; CN 200980121741 A 20090609; EP 09771888 A 20090609; EP 22170104 A 20090609; JP 2009136880 A 20090608; JP 2011512804 A 20090609; US 47994709 A 20090608; US 99654209 A 20090609