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Class Information
Number: 405/93
Name: Hydraulic and earth engineering > Fluid control, treatment, or containment > Flow control > Water gate or adjustable weir > Condition responsive > To weight of liquid separated from a main body
Description: Method or apparatus wherein the water gate has associated therewith which receives liquid therein from the body of liquid controlled by the water gate which means responds to the weight of the received liquid to control the position of the gate.

Patents under this class:

Patent Number Title Of Patent Date Issued
8511938 Flood flaps vent for sealed crawlspace Aug. 20, 2013
6719491 Fluid level control system Apr. 13, 2004
6171023 Water control gate Jan. 9, 2001
4963057 Sluice gate for automatically regulating a level Oct. 16, 1990
4449851 Energy-efficient automatic sluice gate for sustaining a fluid level May. 22, 1984
4242009 Apparatus for automatically and selectively discharging saline water Dec. 30, 1980

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