Title:
掘削装置および掘削装置の操作方法
Document Type and Number:
Japanese Patent JP4864951
Kind Code:
B2
Abstract:
A drill drive (22) placed on a slide (30) guided on a derrick (20), drives a drill rod. An annular gear (40) is placed between the drill drive and drill rod and is placed on the drill drive in disengageable and reversible manner, for inverting gear ratio. An independent claim is included for drilling implement operating method.
Inventors:
Saint matias
Krollman Karl Johannes
Yais Melchior
Krollman Karl Johannes
Yais Melchior
Application Number:
JP2008236132A
Publication Date:
February 01, 2012
Filing Date:
September 16, 2008
Export Citation:
Assignee:
Bauer Maschinen Game Behr
International Classes:
E21B3/02; E21B7/00
Domestic Patent References:
| JP2002081285A | ||||
| JP57123890U | ||||
| JP1057190U | ||||
| JP63176585A | ||||
| JP2002021456A |
Attorney, Agent or Firm:
Kenji Yoshida
Jun Ishida
Jun Ishida