Title:
PNEUMATIC SOIL EXCAVATOR
Document Type and Number:
Japanese Patent JP2963263
Kind Code:
B2
Abstract:
PURPOSE: To excavate a square hole having an optional section in a pneumatic soil excavator which crashes soil by utilizing positive and negative air pressure while ejecting the crashed soil and sand.
CONSTITUTION: Soil is crashed circularly by pressurized air and a square hole excavating tubular head 60 having a square section for example is disposed around an excavating head 44 for ejecting automatically the crashed soil and sand with a vacuum suction force so that the head 60 is supported to hold the stationary state. An air outlet 62 for further excavating the soil to form a square hole on the basis of the circular one by jetting similarly the high speed-pressurized air to the soil to be crashed is 18 provided in at least corner parts 60a of the square hole excavating head 60.
Inventors:
KOGA MOTOYUKI
SATO TOORU
SATO TOORU
Application Number:
JP35026291A
Publication Date:
October 18, 1999
Filing Date:
December 09, 1991
Export Citation:
Assignee:
HATSUKOO KK
International Classes:
E21B7/00; E21B7/18; (IPC1-7): E21B7/18; E21B7/00
Domestic Patent References:
| JP539696A | ||||
| JP539695A | ||||
| JP4327689A | ||||
| JP4327688A | ||||
| JP4327687A | ||||
| JP4327686A | ||||
| JP4327685A | ||||
| JP4327682A |
Attorney, Agent or Firm:
Nobuhiro Kobashi (1 outside)
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