Global Patent Index - EP 2024527 A2

EP 2024527 A2 2009-02-18 - METHOD FOR HARDENING RUNNING SURFACES OF ROLLER BEARING COMPONENTS

Title (en)

METHOD FOR HARDENING RUNNING SURFACES OF ROLLER BEARING COMPONENTS

Title (de)

VERFAHREN ZUM HÄRTEN VON LAUFFLÄCHEN VON WÄLZLAGERKOMPONENTEN

Title (fr)

PROCÉDÉ PERMETTANT DE FAIRE DURCIR DES SURFACES DE ROULEMENT DE COMPOSANTS DE PALIER À ROULEMENT

Publication

EP 2024527 A2 (DE)

Application

EP 07764340 A

Priority

  • DE 2007000932 W
  • DE 102006025008 A

Abstract (en)

[origin: WO2007137557A2] The invention relates to a method for hardening running surfaces (3) of roller bearing components (2), in particular external bearing rings. In order to provide the edge area (functional layer) of the roller bearing components with a deep layer which is particularly hard and resistant to corrosion, the roller bearing component (2) undergoes nitration for a long period of time at a temperature of between 450 and 650 °C and for at least 25 hours. During said treatment no carburizing and/or subsequently hardening takes place.

IPC 8 full level (invention and additional information)

C23C 8/26 (2006.01); C23C 8/02 (2006.01); C23C 8/38 (2006.01)

CPC (invention and additional information)

C23C 8/26 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/52 (2013.01); C23C 8/02 (2013.01); C23C 8/22 (2013.01); C23C 8/36 (2013.01); C23C 8/38 (2013.01); F16C 33/14 (2013.01); F16C 33/64 (2013.01); F16C 2220/70 (2013.01); F16C 2223/02 (2013.01); F16C 2223/06 (2013.01); F16C 2223/12 (2013.01); F16C 2223/14 (2013.01); F16C 2223/16 (2013.01); F16C 2240/18 (2013.01); Y10T 29/49643 (2013.01); Y10T 29/49689 (2013.01); Y10T 29/49707 (2013.01); Y10T 29/49709 (2013.01)

Citation (search report)

See references of WO 2007137557A3

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

EPO simple patent family

DE 102006025008 A1 20071206; EP 2024527 A2 20090218; US 2010058592 A1 20100311; US 8479396 B2 20130709; WO 2007137557 A2 20071206; WO 2007137557 A3 20081211

INPADOC legal status


2017-09-06 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20170325

2015-03-04 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG

2014-03-19 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG

2012-03-14 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG

2009-11-18 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) (DELETED)

2009-05-13 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20090416

2009-02-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20081128

2009-02-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

2009-02-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL BA HR MK RS