Title:
地下水揚水装置
Document Type and Number:
Japanese Patent JP3974851
Kind Code:
B2
Abstract:
A groundwater pumping apparatus includes an outer tube, an inner tube, a shield member, a vacuum unit and a pump unit. The outer tube is buried in ground, and has a water-passing portion at its lower part. The inner tube has a substantially same length as the outer tube, and is placed in the outer tube such that the inner tube is spaced from the outer tube. The inner tube has a groundwater inlet at its bottom end, which is provided at a position lower than a top end of the water-passing portion. The shield member shields top ends of the outer tube and the inner tube. The vacuum unit reduces a pressure in the inner tube. The pump unit pumps groundwater that comes in the inner tube through the groundwater inlet.
Inventors:
Shigekichi Takahashi
Yoshiyuki Minamishima
Shuichi Matsumura
Toru Yamaguchi
Yoshiyuki Minamishima
Shuichi Matsumura
Toru Yamaguchi
Application Number:
JP2002517906A
Publication Date:
September 12, 2007
Filing Date:
July 31, 2001
Export Citation:
Assignee:
Nishimatsu Construction Co., Ltd.
Naruyuki Tone Co., Ltd.
Nippon Construction Machinery Trading Co., Ltd.
Limited company Asahi Techno
Naruyuki Tone Co., Ltd.
Nippon Construction Machinery Trading Co., Ltd.
Limited company Asahi Techno
International Classes:
E02D3/10; E02D19/10; E21B43/12
Domestic Patent References:
| JP2000027170A | ||||
| JP3070737Y2 | ||||
| JP53039611A | ||||
| JP8013463A | ||||
| JP61125539U | ||||
| JP8269938A |
Attorney, Agent or Firm:
Keisei Nishikawa
Atsuo Mori
Atsuo Mori