Title:
OPENING AND CLOSING DEVICE OF FISH-LADDER GATE
Document Type and Number:
Japanese Patent JP3113766
Kind Code:
B2
Abstract:
PURPOSE: To allow fish to go upstream more effectively.
CONSTITUTION: A plurality of gates 1 are arranged at every specified distance and the tap height of the gate 1 is variable with the rotary movement of a rod arm 3. In such a fish ladder, a link arm 20 pin-connected at the middle and vertically arranged for the rotary movement of rod arm 3 and two lines of link rods 14a, 14b connected to the upper and lower ends of the link arm 3 respectively and driven horizontally, are equipped at the end of rod arm 3. The connecting position 19 of the rod arm 3 with the link arm 20 can be changed in turn from the upstream side gate to the downstream side gate.
Inventors:
Minoru Nakamura
Umeda Yoshio
Koji Mikumo
Michiyuki Abe
Kazumi Tanaka
Hirotaka Kosugi
Takeo Ohtsuki
Umeda Yoshio
Koji Mikumo
Michiyuki Abe
Kazumi Tanaka
Hirotaka Kosugi
Takeo Ohtsuki
Application Number:
JP27046993A
Publication Date:
December 04, 2000
Filing Date:
October 28, 1993
Export Citation:
Assignee:
Water Resources Development Corporation
Nippon Steel Tube Co., Ltd.
Nippon Steel Tube Co., Ltd.
International Classes:
E02B7/20; E02B8/08; (IPC1-7): E02B7/20; E02B8/08
Domestic Patent References:
| JP5927228U | ||||
| JP5931628U | ||||
| JP6162929U |
Attorney, Agent or Firm:
Takehiko Suzue
Previous Patent: JPH03113765
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