Patents-Review.com
ClassID:

38249 ⎘

B21C23/20 - CPC Classification

Classification description:

Extruding metal; Impact extrusion; Making uncoated products by backward extrusion

Sub-classes:
Recent Application in this class:
#1
20210299727
2021-09-30

Method of forming thick-walled cylinder by spinning

 #2
20200391265
2020-12-17

Electromagnetic extrusion

 #3
20200009628
2020-01-09

Forward and backward extrusion composite forming method using mould having open inner cavity

 #4
20180056353
2018-03-01

Rotary extrusion producing mold for producing inner ring rib with large aspect ratio formed of hollow billet

 #5
20160290178
2016-10-06

Ball plunger for use in a hydraulic lash adjuster and method of making same

 #6
20160052035
2016-02-25

System and method for hydrostatic backward extrusion

 #7
20120234067
2012-09-20

Ball plunger for use in a hydraulic lash adjuster and method of making same

 #8
20120090375
2012-04-19

ZONING CLOSED-DIE EXTRUDING DEVICE AND METHOD

 #9
20100071649
2010-03-25

BALL PLUNGER FOR USE IN A HYDRAULIC LASH ADJUSTER AND METHOD OF MAKING SAME

 #10
20080047125
2008-02-28

Method for forming tapered piston pins

 #11
20070107484
2007-05-17

Forging method, forged article and forging apparatus

 #12
20070107201
2007-05-17

Method of forming a housing of a vehicle occupant protection apparatus

 #13
20060213246
2006-09-28

Backward extrusion process for inner profiles

 #14
20060185148
2006-08-24

Method of forming axles with internally thickened wall sections

 #15
20060174737
2006-08-10

Manufacturing method of die for manufacturing liquid ejecting head, and material block used in the same

 #16
20060156847
2006-07-20

Methods of producing an annulus gear and drive shell

 #17
20050126250
2005-06-16

Cold form nozzle for laser processing

 #18
20050126249
2005-06-16

Splined clutch hub and method of making same

 #19
20050115296
2005-06-02

Method for manufacturing universal joint yoke, forging die and preform