EP 0893570 A1 19990127 - Multiple head drilling unit for loose soil drill
Title (en)
Multiple head drilling unit for loose soil drill
Title (de)
Mehrfachbohrkopfeinheit für lockeren Untergrund
Title (fr)
Dispositif de forage à plusieurs têtes dans un sol meuble
Publication
Application
Priority
IT AN970037 U 19970711
Abstract (en)
This invention concerns a multiple head drilling unit for loose soil drills characterised in that its drilling heads are mounted parallel and close to each other on a common sliding trolley on a single rail. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 7/00 (2006.01); E21B 7/18 (2006.01); E21D 9/04 (2006.01); E21D 9/10 (2006.01)
CPC (source: EP)
E21B 7/002 (2013.01); E21B 7/18 (2013.01); E21D 9/04 (2013.01); E21D 9/1066 (2013.01)
Citation (search report)
- [A] GB 2196276 A 19880427 - MCGREGOR
- [A] DE 826896 C 19520107 - FRIED KRUPP BERGWERKE ESSEN
- [A] US 5575345 A 19961119 - SHIBASAKI MITSUHIRO [JP], et al
- [A] DE 3041666 A1 19820609 - FISCHER ADOLF
- [A] US 4681170 A 19870721 - OHI TOSHIO [JP]
- [A] FR 2623242 A1 19890519 - CONTANT PAUL [FR]
- [A] EP 0308083 A2 19890322 - MANCHAK FRANK
Designated contracting state (EPC)
BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
EP 0893570 A1 19990127; IT 243298 Y1 20020304; IT AN970037 U1 19990111
DOCDB simple family (application)
EP 98830409 A 19980703; IT AN970037 U 19970711