Abstract: The subject disclosure is directed to a liquid purification assembly featuring an inclined cell separator located within a chamber. The separator features a plurality of plates oriented perpendicular between opposing spaced-apart substantially vertical weirs. The plurality of plates are substantially parallel to one another and extend longitudinally within the chamber. The first and second weirs can have a plurality of orifices extending therethrough between their front and rear surfaces. The chamber features an influent chamber, an effluent chamber and a sediment collection area along the bottom of the chamber below the cell separator. A net extending from the top edge of the first weir and over a portion of the cell separator is further provided. The assembly features a hinged baffle suspended below the bottom edge of the second weir.

Abstract: The present invention utilizes a vertically upward force of a water when a tsunami smashes into a building to close openings that exist in an elevated location such as air supply and exhaust ducts, powerlessly and without a manual operation. The present invention serves as a disaster prevention panel which closes an opening 2a disposed in a wall of a building 2. A door bumper 3 is disposed on an outer peripheral wall of the opening 2a, and side door bumpers 4 are disposed on both sides of the door bumper 3. A door body 1, which closes the opening 2a and which has a specific gravity lower than a seawater, is attached between the side door bumpers 4 on both sides so as to freely swing upwards, with a lower portion of the door bumper 3 serving as a fulcrum.

Abstract: Some examples provide methods, systems, devices and/or apparatus related to reducing and/or restricting water from entering underground transportation system, and more Specifically, to reducing and/or restricting water from entering underground transportation systems via vents based on the weight of the water, while not restricting ventilation airflow when water is not present. Some example systems for restricting water flow in a surface vent may include a frame that receives water, a door pivotally coupled to the frame(where the door may pivot between a first position and a second position), and a reservoir pivotally coupled to the door. The reservoir may collect the received water and may cause the door to pivot between the first position and the second position based on weight of the collected water.

Abstract: An opening/closing device 1 according to the present invention includes a gate 10 that receives a flow of a sewage W in an upright state, and can fall toward a downstream side of the flow and a first spring 52a that generates a force for bringing the gate 10 into an upright state, wherein the first spring 52 generates a force insufficient for bringing the gate 10 into the upright state if the gate 10 is in a fallen state, and generates a force sufficient for bringing the gate into the upright state if the gate 10 is tilted by an angle equal to or less than a predetermined angle.

Abstract: An opening/closing device includes a gate that receives a flow of a sewage, and can fall toward a downstream side of the flow, a fall prevention unit that prevents the gate from falling by supporting the gate, a support release unit that releases the support for the gate by the fall prevention unit, a first float that is arranged on the upstream side of the gate, and is smaller in specific gravity than the sewage, a surfacing prevention unit that prevents the first float from surfacing, a second float that is arranged on the upstream side of the gate, above the first float, and is smaller in specific gravity than the fluid, and a surfacing-prevention release unit that releases, resulting from surfacing of the second float, the prevention of the surfacing of the first float by the surfacing prevention unit. Further, the support release unit is activated resulting from surfacing of the first float.

Abstract: A gate system for an opening through which fluid flows, such as the opening to a storm drain typically found in the curb of an urban street. The system is biased to a closed condition to keep trash out of the drain during dry and low fluid flow situations, then automatically converts to an open condition during heavy fluid flow situations, and then returns to a closed condition when the heavy fluid flow condition abates. The system has a gate portion that rotates between an open position and a closed position adjacent the opening, being biased to the closed position, and a trip plate, which is also biased to a closed position.

Abstract: A tidal gate system for a regulating the flow of tidal waters between a first side and a second side of a main opening. The tidal gate system comprises a primary door member defining a regulated opening, a secondary door member sized and dimensioned to cover the regulated opening, a door float, and a regulation float Gravity biases the primary and secondary door members into their closed positions. The door float causes the secondary door assembly to move out of its closed position when a primary water level on the first side of the main opening exceeds a predetermined regulated opening level. The regulation float is operatively connected to the secondary door assembly such that the regulation float forces the secondary door assembly into its closed position when the primary water level exceeds a predetermined regulation float level.

Abstract: A flood gate is provided that includes a frame defining a fluid passageway, a door pivotally mounted in the frame for movement between a plurality of open positions to permit flow of fluid therethrough, and at least one latching mechanism for holding the door in the closed position. The latching mechanism can release the door when the fluid force meets a preset level, by floatation, or by flow actuation. In addition, the latching mechanism can reset the door to the closed position when the fluid force acting on the door drops below the preset level. The door can include a ventilation opening, an automatic louver assembly for controlling air flow through the ventilation opening and a screen covering the ventilation opening. The flood gate may include a retention mechanism for preventing the door from opening when the structure in which the flood gate is mounted, such as an overhead garage door is rotated or otherwise moved.

Abstract: A flood gate is provided which includes a frame defining a fluid passageway therethrough, a door pivotally mounted in the frame for movement between a plurality of open positions to permit flow of fluid therethrough, and at least one latching mechanism for holding the door in the closed position. The latching mechanism can sense a fluid force acting on the door and can release the door when the fluid force meets a preset level. In addition, the latching mechanism can reset the door to the closed position when the fluid force acting on the door drops below the preset level. The door can include a ventilation opening, an automatic louver assembly for controlling air flow through the ventilation opening and a screen covering the ventilation opening. The automatic louver assembly can contain at least one louver, a temperature sensitive actuating device and a member connecting the louver to the temperature sensitive actuating device and can open and close in response to ambient temperatures.

Abstract: A pump device includes a motor, a pump body having a first body portion and a second body portion, a shaft connected to the motor and extending into the pump body and an impeller mounted on the shaft between the first and second body portions. A four valve assembly is provided in the pump body. The first and second valves are provided in the first body portion, and the third and fourth valves are provided in the second body portion. This pump device may be used to move an attached gate through fluid. When the gate door is to be moved through the fluid in a first direction, the first valve and the fourth valve are opened (and the second and third valves are closed) so that the fluid moves through the pump body from the fourth valve to the first valve. When the gate door is to be moved in a second direction, the second valve and the third valve are opened (and the first and fourth valves are closed) so that the fluid moves through the pump body from the third valve to the second valve.