EP 0915231 A4 20001115 - SPIRAL-SHAPED ROLLER CUTTER AND TUNNEL EXCAVATOR CUTTER HEAD PROVIDED WITH SAME
Title (en)
SPIRAL-SHAPED ROLLER CUTTER AND TUNNEL EXCAVATOR CUTTER HEAD PROVIDED WITH SAME
Title (de)
SPIRALFÖRMIGER ROLLENBOHRMEISSEL UND TUNNELBOHRMASCHINE BESTÜCKT DAMIT
Title (fr)
ORGANE CYLINDRIQUE DE COUPE A SPIRALES ET TETE DE COUPE POUR FOREUSE DE GALERIE LE COMPORTANT
Publication
Application
Priority
- JP 9702512 W 19970722
- JP 21058096 A 19960722
Abstract (en)
[origin: WO9803772A1] A spiral-shaped roller cutter (3), which can efficiently and surely cut reinforcement (7) embedded in existing pipes (6), and a tunnel excavator cutter head (1) provided with the same. Thus the spiral-shaped roller cutter (3) is provided with a plurality of spiral-shaped blade portions (3a). Also, the cutter head (1) is provided with respective roller cutters (3, 3) which extend substantially radially of the cutter head and are rotatable about respective axes (2, 2) of rotation.
IPC 1-7
IPC 8 full level
E21B 10/16 (2006.01); E21B 29/10 (2006.01); E21D 9/06 (2006.01); E21D 9/10 (2006.01)
CPC (source: EP)
E21B 10/16 (2013.01); E21B 29/10 (2013.01); E21D 9/104 (2013.01)
Citation (search report)
- No further relevant documents disclosed
- See references of WO 9803772A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9803772 A1 19980129; EP 0915231 A1 19990512; EP 0915231 A4 20001115; JP H1037680 A 19980210
DOCDB simple family (application)
JP 9702512 W 19970722; EP 97930849 A 19970722; JP 21058096 A 19960722