E - Fixed Constructions – 02 – B
Patent
E - Fixed Constructions
02
B
61/44
E02B 13/00 (2006.01) E02B 7/20 (2006.01) E02B 7/44 (2006.01)
Patent
CA 1124532
ABSTRACT OF THE DISCLOSURE A gate for an irrigation ditch includes a rectangular frame, in which a pair of gates are pivotally mounted on shafts for rotation around vertical axes at the sides of the frame; helical springs connected to the top ends of the shafts and to the frame for regulating the water pressure required to open the gates; and tensioning elements for changing the length and consequently the tension of the springs, so that the pressure required to open the gates can be adjusted.
340844
Dunsmuir George H.
Langeman Peter J.
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