Title:
SOIL DISCHARGE DEVICE
Document Type and Number:
Japanese Patent JP3119467
Kind Code:
B2
Abstract:
PURPOSE: To eliminate loss of soil discharge quantity due to reverse rotation of a screw in the case of carrying out foundation improvement by way of injecting a solidifying agent and to certainly carry out soil discharge in required quantity.
CONSTITUTION: Holding blades 4 to hold drilled soil taken in on screws 3 at the time of reverse rotation are axially supported free to rotate around a vertical shaft or fixed between the screws 3 at least of one any pitch of the screws 3 projectively provided on the outer periphery of a hollow pipe 2. The holding blades 4 avoid falling of the drilled soil from on the screws 3 and draw up the drilled soil on the ground as the hollow pipe 2 is drawn out at the time of reverse rotation of the hollow pipe 2.
Inventors:
Kunihiro Sano
Tomonori Ohsaki
Tomonori Ohsaki
Application Number:
JP16035494A
Publication Date:
December 18, 2000
Filing Date:
July 12, 1994
Export Citation:
Assignee:
Daisho Shinki Co., Ltd.
International Classes:
E21B17/22; E02D3/12; E21B3/02; E21B3/025; E21B7/00; (IPC1-7): E21B7/00; E21B17/22
Domestic Patent References:
| JP4247115A | ||||
| JP169896U |
Attorney, Agent or Firm:
Tomo Hisakado
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