Title:
作業機械および地面に対して作業する方法
Document Type and Number:
Japanese Patent JP6790242
Kind Code:
B2
Abstract:
The invention relates to a working machine and a method for working the ground with the working machine, having a mast, along which, by means of a positioning means, a rotary head is moved vertically, by which a telescopic Kelly rod having at least two Kelly bars is displaced and guided. According to the invention the Kelly bars are locked or unlocked automatically by means of a control, wherein by means of a first detection means a rotation angle of at least one Kelly bar is detected and/or by means of a second detection means a force, torque or pressure change is detected in a hydraulic system. By the control a locking and/or unlocking of the Kelly bars is determined depending on the detected rotation angle and/or the detected change.
Inventors:
Bauer Sebastian
Fisher christian
Showbar andreas
Fisher christian
Showbar andreas
Application Number:
JP2019510964A
Publication Date:
November 25, 2020
Filing Date:
July 12, 2017
Export Citation:
Assignee:
Bauer Maschinen Game Behr
International Classes:
E21B3/02; E21B7/00
Domestic Patent References:
| JP2001329778A | ||||
| JP8199966A | ||||
| JP4202996A | ||||
| JP11141261A | ||||
| JP11200756A | ||||
| JP11217985A | ||||
| JP61053995A | ||||
| JP9203288A | ||||
| JP60126489A | ||||
| JP2011247082A | ||||
| JP2000034879A |
Foreign References:
| DE102012019850A1 | ||||
| US5368083 |
Attorney, Agent or Firm:
Patent Corporation yki International Patent Office