Title:
BUCKET DRIVE DEVICE FOR EARTH DRILL MACHINE
Document Type and Number:
Japanese Patent JP3505711
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To facilitate the disconnecting/connecting work of a hydraulic hose without generating an internal pressure in hydraulic thruster cylinders by fixing a Kelly drive when mounting a bucket drive device on a frame.
SOLUTION: A fixing metal fixture 15 regulating the movement of the Kelly drive 9 is provided between a Kelly frame 7 and the Kelly drive 9 of the bucket drive device 5 to prevent the internal pressure from being generated in the hydraulic thruster cylinders 8 and 8.
Inventors:
Norio Murate
Application Number:
JP2001003479A
Publication Date:
March 15, 2004
Filing Date:
January 11, 2001
Export Citation:
Assignee:
Nippon Vehicle Manufacturing Co., Ltd.
International Classes:
E21B3/04; E21B11/00; (IPC1-7): E21B3/04; E21B11/00
Domestic Patent References:
| JP58156687A | ||||
| JP5863281U |
Attorney, Agent or Firm:
Kazuhiko Kido