A rotary valve and float assembly for controlling a flow of liquid into a container including a plug valve portion and a divider portion. The plug valve portion including a set of plugs that seal against a set of openings in the divider portion when the rotary valve is in a closed position. Movement of the rotary valve between open and closed positions is controlled by the movement of the float assembly in the container. The float assembly typically moves according to a liquid level within the container.

Provided, in one aspect, is 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 ventilation control valve for a fuel tank is disposed in a ventilation passage which communicates an inside and an outside of a fuel tank. The ventilation control valve includes a float that floats on a liquid level of a fuel and moves up and down. The ventilation control valve includes a valve mechanism which switches a passage sectional area of the ventilation passage in conjunction with the float to an open state and a restricted state in which the passage sectional area is restricted from the opened state. The float has a volume chamber in which volume changes in accordance with a vertical movement of the float. A control gap as a flow rate adjusting mechanism is formed between the cylindrical wall of the float and the cylindrical wall of a case. Due to the control gap, the volume chamber functions as a damper.

A ventilation control valve for a fuel tank is disposed in a ventilation passage which communicates an inside and an outside of a fuel tank. The ventilation control valve includes a float that floats on a liquid level of a fuel and moves up and down. The ventilation control valve includes a valve mechanism which switches a passage sectional area of the ventilation passage in conjunction with the float to an open state and a restricted state in which the passage sectional area is restricted from the opened state. The float has a volume chamber in which volume changes in accordance with a vertical movement of the float. A control gap as a flow rate adjusting mechanism is formed between the cylindrical wall of the float and the cylindrical wall of a case. Due to the control gap, the volume chamber functions as a damper.

A valve assembly includes a valve housing, a cap coupled to the valve housing and defining a cap inlet, a float movably disposed inside the valve housing such that the float is movable relative to the valve housing, a ribbon coupled between the float and the cap such that the ribbon is movable relative to the valve housing upon movement of the float. The float includes a main float body and a retaining feature coupled to the main float body, and the retaining feature secures the ribbon attached to the float.

A valve assembly includes a valve housing, a cap coupled to the valve housing and defining a cap inlet, a float movably disposed inside the valve housing such that the float is movable relative to the valve housing, a ribbon coupled between the float and the cap such that the ribbon is movable relative to the valve housing upon movement of the float. The float includes a main float body and a retaining feature coupled to the main float body, and the retaining feature secures the ribbon attached to the float.

An apparatus for preventing fuel overflow of a vehicle fuel tank includes: a valve unit including a valve body, a housing configured to cover a lower part of the valve body, a float mounted on the valve body and configured to slide up and down, a vapor line opened and closed according to a movement of the float, and a fuel inlet hole; a cover unit coupled to and enveloping the housing, the cover unit having a plurality of windows along an outer circumferential surface at a height corresponding to the fuel inlet hole, thereby being formed to allow the fuel to be introduced into the valve unit; and a shielding unit mounted on the cover unit to shield open windows, the shielding unit able to rotate along a turning direction of the vehicle to form an inflow path of the fuel flowing into the fuel inlet hole.

An apparatus for preventing fuel overflow of a vehicle fuel tank includes: a valve unit including a valve body, a housing configured to cover a lower part of the valve body, a float mounted on the valve body and configured to slide up and down, a vapor line opened and closed according to a movement of the float, and a fuel inlet hole; a cover unit coupled to and enveloping the housing, the cover unit having a plurality of windows along an outer circumferential surface at a height corresponding to the fuel inlet hole, thereby being formed to allow the fuel to be introduced into the valve unit; and a shielding unit mounted on the cover unit to shield open windows, the shielding unit able to rotate along a turning direction of the vehicle to form an inflow path of the fuel flowing into the fuel inlet hole.

A fluid control system to control fluid flow within a drainage system is disclosed that includes a cage configured to couple an interior wall of a structure of the drainage system, wherein the cage at least partially surrounds an aperture of the interior wall, and a float device configured to be encapsulated within the cage, wherein while in a resting state, the float device at least partially covers an aperture of the structure of the drainage system. In some instances, when fluid contacts the float device at a flow rate of at least a flow threshold, the float device is configured to at least partially uncover the aperture of the interior wall, or further uncover the aperture of the interior wall. The float device may be formed from a buoyant material and configured to rise from the resting state in accordance with a rising fluid level within the structure.

A fluid control system to control fluid flow within a drainage system is disclosed that includes a cage configured to couple an interior wall of a structure of the drainage system, wherein the cage at least partially surrounds an aperture of the interior wall, and a float device configured to be encapsulated within the cage, wherein while in a resting state, the float device at least partially covers an aperture of the structure of the drainage system. In some instances, when fluid contacts the float device at a flow rate of at least a flow threshold, the float device is configured to at least partially uncover the aperture of the interior wall, or further uncover the aperture of the interior wall. The float device may be formed from a buoyant material and configured to rise from the resting state in accordance with a rising fluid level within the structure.