Title:
EXCAVATION BUCKET WITH EXPANDING BLADE
Document Type and Number:
Japanese Patent JP3227079
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To press-fit a manhole, etc., easily, and to improve operating efficiency.
SOLUTION: An excavation bucket 18, in which excavation blades are installed on a base, and a kelly-bar 10 lifted and lowered while being rotated and driven are connected through a connecting member 24 in a rotatable and transmissible manner and in a manner that a fixed quantity can be moved between the place of excavation and a hung place in the axial direction of the kelly-bar 10. Expanding blades 32, 33 and the connecting member 24 are joined by links 34, 35 so that the expanding blades 32, 33 are supported on the excavation bucket 18 in a protrusible manner in the radial direction while the expanding blades 32, 33 are protruded by movement to the place of excavation and the expanding blades 32, 33 are pulled to the side inner than the outer circumference of the excavation bucket 18 by movement to the hung place.
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Inventors:
Masahiro Nakashima
Application Number:
JP29863295A
Publication Date:
November 12, 2001
Filing Date:
November 16, 1995
Export Citation:
Assignee:
Nippon Vehicle Manufacturing Co., Ltd.
International Classes:
E21B11/00; (IPC1-7): E21B11/00
Domestic Patent References:
| JP5044002U | ||||
| JP5633391U | ||||
| JP63156288U | ||||
| JP52102801U | ||||
| JP329591U |
Attorney, Agent or Firm:
Tsutomu Adachi