Title:
溝開削方法及び機械
Document Type and Number:
Japanese Patent JP4087794
Kind Code:
B2
Abstract:
Trenching apparatus comprises a cutting device (23), preferably an endless chain cutter, mounted on a prime mover (21) for positioning the cutting device in a trench (18) with the prime mover movable on the ground surface (22) above the level of the trench. Where the cutting device is a chain cutter, the boom projects forwardly and downwardly relative to the direction of cutting the trench, and drive means are arranged to drive the chain in a direction to carry the cutting elements upwardly around the distal end of the boom and rearwardly along the upper run (30) of the endless chain cutter (23). In operation the distal end of the chain cutter (23) is positioned against the end face of the trench at the bottom of the trench (18); the prime mover (21) moves the chain cutter forwardly in the trench while operating the chain cutter, so as to produce an undercut (55) in the end face (54) of the trench; and the lifting means (25) lifts the cutting device (23) upwardly from the undercut through the material of the end face so as to cut material from the end face of the trench.
Inventors:
Kelly, Keith Richard
Girhord, Jack
Girhord, Jack
Application Number:
JP2003545895A
Publication Date:
May 21, 2008
Filing Date:
November 13, 2001
Export Citation:
Assignee:
MASTENBROEK LTD.
International Classes:
E02F5/06; E02F3/06; E02F3/10; E02F3/20; E02F5/00; E02F5/10; E02F5/14; E02F3/08; E02F3/18; E02F5/02
Foreign References:
| US5074063 |
Attorney, Agent or Firm:
Taku Takeuchi
Shoji Okamoto
Shoji Okamoto