Title:
UNDERDRAINAGE DEVICE
Document Type and Number:
Japanese Patent JP3699986
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an underdrainage device having drainage function stabilized for a long period by retarding the formation of iron oxide in a pipe, and a water level-regulating function required for underground irrigation and also capable of keeping a high water level when used for a paddy field.
SOLUTION: The underdrainage device draining underground water flowed in a water-permeable underdrainage pipe buried in the ground of a field through a water-impermeable drainage pipe 18 has a pool trap 24 bent in the lower direction and formed in the midway of the drainage pipe 18 to prevent the circulation of air in the drainage pipe 18 by the water stored in the pool trap 24. One opening of the pool trap is opened upward in the drainage pit 23, and a water level-regulating pipe 25 in the vertical direction is detachably attached to the opening to regulate the underground water level and to drain the water.
Inventors:
Tsuneo Onodera
Fujimori new work
Shigeyuki Ito
Ken Yamazato
Fujimori new work
Shigeyuki Ito
Ken Yamazato
Application Number:
JP2002101700A
Publication Date:
September 28, 2005
Filing Date:
April 03, 2002
Export Citation:
Assignee:
National Institute of Agricultural Engineering
Paddy Research Institute, Inc.
Sekisui Chemical Co.,Ltd.
Mitsubishi Plastics Co., Ltd.
Paddy Research Institute, Inc.
Sekisui Chemical Co.,Ltd.
Mitsubishi Plastics Co., Ltd.
International Classes:
A01G25/06; A01G25/00; E02B11/00; (IPC1-7): A01G25/06; A01G25/00; E02B11/00
Domestic Patent References:
| JP56170959U | ||||
| JP11289889A | ||||
| JP200234362A |
Attorney, Agent or Firm:
Kazuhiko Kido
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