E21D9/081 - CPC Classification Index

ClassID:

135994 ⎘

E21D9/081 - CPC Classification

Classification description:

Sub-classes:

E21D2009/084 » {with rotary drilling heads having variable diameter} 0
E21D9/082 » {the shield being provided with devices for lining the tunnel, e.g. shuttering} 0

Recent Application in this class:

20150042146

2015-02-12

Earth pressure balance shield machine without cutter disk

20140357461

2014-12-04

Bit exchange method and bit exchange device for shield tunneling machine

20140232167

2014-08-21

Device for monitoring the state of rotation of a disk cutter arrangement of a shield tunnel boring machine and disk cutter arrangement for a shield tunnel boring machine

20140217805

2014-08-07

Drill bit exchange device for shield tunneling machine

20140084668

2014-03-27

Excavation machine

20130264860

2013-10-10

Cutting head tool for tunnel boring machine