Apparatuses, systems, and methods are disclosed for fluid flow control. A container is shaped to receive a liquid. An inlet is configured to allow the liquid to enter the container. An outlet is configured to allow the liquid to exit the container. A float is disposed within the container. A valve is actuated based on a position of the float within the container to open the valve at a first liquid level within the container and to close the valve at a different liquid level within the container.

A float for use with a fluid flow control device. The float, in at least one aspect, includes a fluid impermeable exterior, and a base material having one or more cavities positioned within the fluid impermeable exterior, the base material formed using an additive manufacturing process.

A float for use with a fluid flow control device. The float, in at least one aspect, includes a fluid impermeable exterior, and a base material having one or more cavities positioned within the fluid impermeable exterior, the base material formed using an additive manufacturing process.

An opening/closing device according to the present invention includes a gate, a fall prevention unit, a support release unit, a first float, a floating prevention unit, a second float, and a floating prevention release unit. The gate receives a flow of fluid, and is able to fall down toward a downstream direction of the flow. The fall prevention unit supports the gate, thereby preventing the gate from falling down. The support release unit releases the support for the gate by the fall prevention unit. The first float is arranged on an upstream side of the gate, is arranged on one of the left side and the right side of the gate viewed from upstream, and is less in the specific gravity than the fluid. The floating prevention unit prevents the first float from floating.

An opening/closing device according to the present invention includes a gate, a fall prevention unit, a support release unit, a first float, a floating prevention unit, a second float, and a floating prevention release unit. The gate receives a flow of fluid, and is able to fall down toward a downstream direction of the flow. The fall prevention unit supports the gate, thereby preventing the gate from falling down. The support release unit releases the support for the gate by the fall prevention unit. The first float is arranged on an upstream side of the gate, is arranged on one of the left side and the right side of the gate viewed from upstream, and is less in the specific gravity than the fluid. The floating prevention unit prevents the first float from floating.

A fill limit vent valve for a fuel system includes a housing assembly, an outlet port and a flow dam. The housing assembly has a main housing including a cylindrical body and an upper housing portion. The upper housing portion has a lower wall that defines an orifice and an outer cylindrical wall that defines an upper housing chamber. The outlet port is formed on the main housing and fluidly communicates fuel vapor out of the fill limit valve. The orifice is offset from a centerpoint of the lower wall in a direction away from the outlet port. The flow dam extends from the lower wall into the upper housing chamber and connects on opposite ends to the outer cylindrical wall. The flow dam and upper housing chamber cooperating to form a liquid trap that mitigates the possibility of liquid fuel from reaching the outlet port from the orifice.

An automatic water regulator includes a water tank component and a base component disposed thereunder. The water tank component includes a box body, a water inlet arranged in a middle portion of the box body, a spring, a sealing ring, an ejector rod sleeved by the spring and inserted into an intermediate position of the water inlet, an ejector shaft, a tray disposed on a side of the ejector rod, a floating bucket disposed at a bottom portion of the box body and away from the side of the ejector rod, and a floating bucket shaft disposed on a middle portion of the floating bucket. The base component includes a main base body and a supporting rib therein and below the tray. The sealing ring is disposed on top of the ejector rod. A bottom end of the ejector rod is connected to the floating bucket.

An automatic water regulator includes a water tank component and a base component disposed thereunder. The water tank component includes a box body, a water inlet arranged in a middle portion of the box body, a spring, a sealing ring, an ejector rod sleeved by the spring and inserted into an intermediate position of the water inlet, an ejector shaft, a tray disposed on a side of the ejector rod, a floating bucket disposed at a bottom portion of the box body and away from the side of the ejector rod, and a floating bucket shaft disposed on a middle portion of the floating bucket. The base component includes a main base body and a supporting rib therein and below the tray. The sealing ring is disposed on top of the ejector rod. A bottom end of the ejector rod is connected to the floating bucket.

A tank refilling system is configured to keep liquid in a destination tank close to a predetermined destination tank fill line. The tank refilling system has a source tank connected to a destination tank with a flow through secondary process therebetween. Liquid flows between the tanks by gravity fed drainage. A single liquid supply channel to transfer pressurized supply liquid is comprised of a plurality of piping segments and one or more valves, all connected in series. A source tank mounted valve is configured to permit liquid to flow until the height of liquid level in the source tank reaches a predetermined level. A destination tank mounted valve is configured to permit liquid to flow until the height of liquid level in the destination tank reaches a predetermined level. The apparatus of the invention also prevents tank overflow for both the source tank and the destination tank.

A water shut-off device is disclosed. The water shut-off device has an inlet port and an outlet port. The water shut-off device includes: a housing fluidly connected to the inlet port and the outlet port, the housing having an opening at its upper end and including: a valve for switching the device between an open configuration and a closed configuration, the valve permitting flow of water through the device in the open configuration and prohibiting flow of water through the device in the closed configuration; a gear wheel secured to the housing and operatively coupled to the valve, the valve being actuated by rotations of the gear wheel; and an anchor in mechanical communication with the gear wheel, the anchor including: a container for receiving water flowing through the opening; and at least one pallet connected to the container, the at least one pallet being configured to catch against one or more teeth of the gear wheel, the anchor being rotatably mounted at a fixed pivot in the housing such that the anchor swings about the pivot as water collects in the container, the swinging of the anchor about the pivot causing the at least one pallet to alternately catch and release a tooth of the gear wheel, thereby causing the gear wheel to rotate in a first direction.