ClassID:

119090

C21D9/30 - CPC Classification

Classification description:

Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts

Recent Application in this class:
#1
20250360557
2025-11-27

SYSTEMS AND METHODS FOR IMPROVING IRON-BASED CAMSHAFT FATIGUE LIFE

#2
20250327479
2025-10-23

CRANKSHAFT AND METHOD OF MANUFACTURING THE SAME

#3
20240091847
2024-03-21

CRANKSHAFT AND METHOD OF MANUFACTURING FORGED MATERIAL FOR CRANKSHAFT

#4
20240044358
2024-02-08

Crankshaft and method of manufacturing the same

#5
20230304528
2023-09-28

CRANKSHAFT

#6
20220364195
2022-11-17

METHOD OF MANUFACTURING CAM PIECE FOR CONTINUOUSLY VARIABLE VALVE DURATION AND CAM PIECE MANUFACTURED THEREFROM

#7
20220177991
2022-06-09

Steel shaft component

#8
20220081736
2022-03-17

Method for controlling deformation of a large-scale crankshaft

#9
20220056545
2022-02-24

STEEL, PRODUCT MADE OF SAID STEEL, AND MANUFACTURING METHOD THEREOF

#10
20220010416
2022-01-13

Roughly-shaped steel material for nitrided part, and nitrided part

#11
20210348247
2021-11-11

STEEL MATERIAL FOR SLIDING MEMBERS AND METHOD OF MANUFACTURING THE SAME

#12
20210214814
2021-07-15

Method and system for heat treating a workpiece

#13
20210115966
2021-04-22

INDUCTION-HARDENED CRANKSHAFT AND METHOD OF MANUFACTURING ROUGHLY SHAPED MATERIAL FOR INDUCTION-HARDENED CRANKSHAFT

#14
20210087645
2021-03-25

Crankshaft and method of manufacture

#15
20200216924
2020-07-09

Method and device for work-hardening a crankshaft

#16
20200199704
2020-06-25

METHOD FOR HEAT TREATING WITH A GRADUAL TEMPERATURE PROFILE

#17
20200190616
2020-06-18

SLIDING CAMSHAFT AND METHOD OF MANUFACTURING

#18
20200181726
2020-06-11

Method of manufacturing cam piece for continuously variable valve duration and cam piece manufactured therefrom

#19
20200131594
2020-04-30

Steel for crankshaft and method of manufacturing crankshaft using the same

#20
20200048727
2020-02-13

Crankshaft and method of manufacture

#21
20190330709
2019-10-31

METHOD FOR HEAT TREATING A CRANKSHAFT FOR A VEHICLE PROPULSION SYSTEM

#22
20190218634
2019-07-18

LASER HEAT-TREATED SHAFT AND METHOD OF MAKING THE SAME

#23
20190143398
2019-05-16

LASER-HARDENED FILLET-ROLLED CRANKSHAFT

#24
20190136354
2019-05-09

Non-heat treated steel for induction hardening

#25
20190062861
2019-02-28

Steel, product created from said steel, and manufacturing method thereof

#26
20190010589
2019-01-10

LARGE CRANKSHAFT

#27
20190002997
2019-01-03

Method and system for laser hardening of a surface of a workpiece

#28
20180291486
2018-10-11

Hot forging steel and hot forged product

#29
20180251883
2018-09-06

Nitrided steel part and method of production of same

#30
20180179949
2018-06-28

Connecting rod for variable compression internal combustion engine

#31
20180155804
2018-06-07

Method and apparatus for heat treatment of a ferrous material using an energy beam

#32
20180087123
2018-03-29

Steel, product made of said steel, and manufacturing method thereof

#33
20180065205
2018-03-08

METHOD FOR PRODUCING A CAMSHAFT

#34
20170343038
2017-11-30

LASER HARDENED CRANKSHAFT

#35
20170284452
2017-10-05

Steel material, crankshaft, and automobile component

#36
20170283899
2017-10-05

CARBURIZING AUSTEMPERING PROCESS

#37
20170268083
2017-09-21

High-strength steel for steel forgings, and steel forging

#38
20170226606
2017-08-10

Method of manufacturing a sliding camshaft

#39
20170198368
2017-07-13

Laser hardened crankshaft

#40
20170165742
2017-06-15

Crankshaft and method of strengthening shaft component

#41
20170067140
2017-03-09

Steel for induction hardening

#42
20170044635
2017-02-16

Steel for surface-treated mechanical parts with high characteristics, and mechanical parts in this steel and manufacturing method thereof

#43
20170022584
2017-01-26

Method and system for laser hardening of a surface of a workplace

#44
20160298203
2016-10-13

High fatigue strength components requiring areas of high hardness

#45
20160281548
2016-09-29

CAMSHAFT ADJUSTING DEVICE

#46
20150376763
2015-12-31

Non-thermal refined soft-nitrided component

#47
20150259771
2015-09-17

High strength low alloy steel and method of manufacturing

#48
20150240335
2015-08-27

Steel for induction hardening roughly shaped material for induction hardening

#49
20150225805
2015-08-13

Single shot inductor for heat treatment of closely spaced multiple eccentric cylindrical components arranged along the longitudinal axis of a workpiece

#50
20150211083
2015-07-30

Method and system for laser hardening of a surface of a workpiece

#51
20150053044
2015-02-26

Camshaft for HP common rail oil pump, manufacturing method thereof and interference assembly device thereof

#52
20140373351
2014-12-25

Process for producing forged product

#53
20140326365
2014-11-06

Nitrocarburized crankshaft and method of manufacturing the same

#54
20140261921
2014-09-18

Process to improve fatigue strength of micro alloy steels, forged parts made from the process and an apparatus to execute the process

#55
20140246126
2014-09-04

Method for producing steel component

#56
20140183174
2014-07-03

Heat treatment device for crank shaft

#57
20140099228
2014-04-10

Steel with excellent rolling-contact fatigue properties

#58
20140007428
2014-01-09

Heating device

#59
20130263980
2013-10-10

Method for improving fatigue strength of cast iron material

#60
20130156630
2013-06-20

Steel for induction hardening and crankshaft manufactured using the same

#61
20130087014
2013-04-11

Forged crankshaft

#62
20130025747
2013-01-31

Steel for induction hardening, roughly shaped material for induction hardening, producing method thereof, and induction hardening steel part

#63
20120247619
2012-10-04

Carburized steel and its process of manufacture

#64
20120241058
2012-09-27

CAST IRON CAST PART AND METHOD FOR PRODUCTION THEREOF

#65
20120187113
2012-07-26

Undercut crankshaft hardening coil

#66
20120186320
2012-07-26

METHOD AND MACHINE TOOL FOR THE PROCESSING AND HARDENING OF METALLIC WORKPIECES

#67
20120168039
2012-07-05

Cryogenic treatment of martensitic steel with mixed hardening

#68
20120168035
2012-07-05

Steel for machine structural use, manufacturing method for same, case hardened steel component, and manufacturing method for same

#69
20120082587
2012-04-05

High strength low alloyed sintered steel

#70
20120063945
2012-03-15

Steel for machine structural use

#71
20110308487
2011-12-22

Method for linking elements to hollow shafts, preferably for producing camshafts, and resulting camshaft

#72
20110089167
2011-04-21

Arrangement Structure of Guide Chip for High-Frequency Induction Heating Coil

#73
20110089164
2011-04-21

Device for hardening a cylindrical section of a workpiece and use of such a device

#74
20110084063
2011-04-14

Arrangement and method for powering inductors for induction hardening

#75
20110073591
2011-03-31

Guide Chip Structure for High-Frequency Induction Heating Coil

#76
20110017351
2011-01-27

Nitrocarburized raw material for crankshafts and method for manufacturing the same

#77
20110005645
2011-01-13

AUSTENITIC STAINLESS STEEL, AND METHOD FOR REMOVING HYDROGEN THEREFROM

#78
20100200122
2010-08-12

Case hardenable nickel-cobalt steel

#79
20100181305
2010-07-22

Induction heat treatment of complex-shaped workpieces

#80
20100126638
2010-05-27

Method of making a diesel-engine crankshaft

#81
20100084059
2010-04-08

Method of producing locally austempered ductile iron

#82
20100081004
2010-04-01

Forged product and crankshaft manufactured from it

#83
20100032059
2010-02-11

PROCESS TO MANUFACTURE SHAFT AND GUIDE PINS AS USED FOR PLANETARY SYSTEMS

#84
20100012648
2010-01-21

Method of treating a crankshaft

#85
20090308501
2009-12-17

Undercut crankshaft hardening coil

#86
20090188910
2009-07-30

Heat treatment system and method using active feedback

#87
20090159157
2009-06-25

Heat treating device and heat treating method

#88
20090045556
2009-02-19

Equipment and method for hardening treatment of metallic parts

#89
20080276753
2008-11-13

Method of Manufacturing Cam Shaft, Cam Shaft, and Cam Lobe Material Used in the Same

#90
20080264530
2008-10-30

Hot forged product with excellent fatigue strength, method for making the same, and machine structural part made from the same

#91
20080229877
2008-09-25

CRANKSHAFT, INTERNAL COMBUSTION ENGINE, TRANSPORTATION APPARATUS, AND PRODUCTION METHOD FOR CRANKSHAFT

#92
20080149229
2008-06-26

Rolling member and producing method thereof

#93
20080000553
2008-01-03

Soft-nitrided parts made of non-heat treated steel

#94
20070163687
2007-07-19

Component for machine structural use and method for making the same

#95
20070157997
2007-07-12

Method for surface treatment of metal material

#96
20070154339
2007-07-05

Iron-based sintered alloy and manufacturing method thereof

#97
20070143997
2007-06-28

Crankshaft comprising a combined gear wheel and method for the production and use of said crankshaft

#98
20070138169
2007-06-21

Heat treatment apparatus and heat treatment method

#99
20070056959
2007-03-15

Device for induction hardening

#100
20070017273
2007-01-25

Warm forming of metal alloys at high and stretch rates

#101
20060157160
2006-07-20

Machinable austempered cast iron article having improved machinability, fatigue performance, and resistance to environmental cracking

#102
20060027569
2006-02-09

Apparatus for hardening a cylindrical bearing on a shaft by means of induction heating utilizing an elastic element

#103
20050257860
2005-11-24

Rolling member and producing method thereof

#104
20050081378
2005-04-21

Arrangement for crankshaft straightening