A fuel tank valve apparatus includes a valve port configured to allow inside and outside of a fuel tank to communicate with each other, a valve chamber formed under the valve port, a float body disposed movably up and down inside the valve chamber, and a seal member having elasticity with respect to the valve port and mounted on an upper portion of the float body. The seal member includes a main body configured to close the valve port, a combining portion with respect to the upper portion of the float body, and an extending portion laterally extending from the main body. The float body includes a combined portion combined with the combining portion with up-and-down movements of the seal member allowed in a predetermined range, and a hook portion located above the extending portion.

There is provided an anti-siphon device for securing in a fluid tank inlet. The anti-siphon device comprises a housing, an inlet to the housing adapted to receive a fluid dispensing nozzle, the inlet at a proximal end of the hosing, and an outlet at a distal end of the housing. The anti-siphon device further comprises an obstruction disposed within the housing, where an outer surface of the obstruction and an inner wall of the housing define a first flow passageway. The obstruction comprises, a chamber disposed within the obstruction and configured to receive fluid, an inlet aperture in a first portion of the obstruction, and an outlet aperture in a second portion of the obstruction, where the inlet aperture, chamber, and outlet aperture define a second flow passageway, the second flow passageway being configured such that, in use, fluid can flow from the inlet aperture to the outlet aperture via the second flow passageway, whilst fluid flows from the inlet to the outlet via the first flow passageway.

A valve device includes: a housing having a valve chamber and a ventilation chamber divided by a dividing wall, the dividing wall having an opening, and the housing having a discharge opening formed at a peripheral surface on the ventilation chamber side; a float valve coming into and out of contact with the opening; and a fuel vapor pipe connected with the discharge opening outside the housing. The ventilation chamber is provided with a tubular wall which communicates with the discharge opening and which extends from the discharge opening toward the inside of the ventilation chamber. The tubular wall has a surface on the dividing wall side which is provided with a ventilation hole communicating with the ventilation chamber. An end portion on the extending direction side of the tubular wall is closed.

A fuel storage device includes a fuel tank, a circulation passage, a canister, a vapor passage, and an adjuster. The fuel tank is configured to store fuel. The circulation passage fluidly connects the fuel tank and a vicinity of a fuel supply port. The canister is configured to recover gas generated in the fuel tank. The vapor passage fluidly connects the fuel tank and the canister. The adjuster is configured to adjust a circulation flow rate of the gas flowing through the circulation passage in supply of the fuel, using a negative pressure.

A fuel control valve includes a case and a movable body that is movably housed in the case. The case has a valve seat surface shaped in an inner cone shape whose inner diameter increases toward a tip. A valve element surface is operable by the movable body, and is in contact with the valve seat surface along a seal line in a valve closed state. The valve element surface is separated from the valve seat surface in a valve open state. Plural grooves are disposed between the tip and the seal line to expand radially outside from the valve seat surface. Plural projections are defined between the grooves to intermittently leave the valve seat surface.

A vent control valve includes: a first case shaped in a tube that forms a passage for ventilation; a movable valve object arranged in the first case to open and close the passage; an inner case arranged in the first case to support the movable valve object; a second case disposed at a lower end of the first case; a first connection mechanism defined between the first case and the inner case, the first connection mechanism connecting the first case and the inner case with each other; and a second connection mechanism defined between the first case and the second case, the second connection mechanism connecting the first case and the second case with each other.

A device for discharging fuel vapor from a fuel supply system for an internal combustion engine has a container which is situated in the fuel supply system and contains liquid fuel under an upwardly limited pressure. A discharge line, which leads to a tank venting system, leads out of the container. The device also has a detector for detecting vaporous fuel in the container and a blocking device which is coupled to the detector and with which the discharge line can be opened or blocked depending on the detection. A method for discharging fuel vapor from a fuel supply system for an internal combustion engine continuously detects whether vaporous fuel is also present in the container which is situated in the fuel supply system and contains the liquid fuel under an upwardly limited pressure; opens the discharge line if the vaporous fuel has been detected and blocks the discharge line if no vaporous fuel has been detected; and discharges the vaporous fuel through the opened discharge line while retaining the liquid fuel.

A valve suitable for a fuel tank may include a valve housing having a housing part, and a float configured for closing a vent opening, the float being movably arranged inside the valve housing along a middle longitudinal axis running in an axial direction upward or downward. A lower section of the float faces away from the vent opening and faces toward the housing part of the valve housing. At least one spring element is at least partially arranged in or on the housing part and/or is at least partially formed by the housing part. The spring element contacts the float at least when the float moves downward in the valve housing.

A fully-integrated, flow-control module for top-fill fuel tanks is designed to operate with a fuel line attached that supplies fuel under constant pressure. A main flow control valve within the flow-control module closes automatically when the fuel tank is full, and automatically opens when the fuel level drops a certain amount below the full level. A spring-biased valve plunger of the main flow control valve has a bleed aperture that diverts a small amount of incoming fuel to a bleed path that is controlled by a fuel level float that operates on a lever arm that either opens or closes the bleed path. When closed, fuel pressure beneath the valve plunger increases sufficiently that the plunger biasing spring is able to exert a force sufficient to close the valve plunger. Bleed path control hysteresis prevents rapid cycling of the main flow control valve.

There is provided a valve device, including: a housing in which, via a partition wall, a valve chamber is provided below the partition wall and a vent chamber is provided above the partition wall, and a vent hole through which the valve chamber and the vent chamber communicate with each other is provided in the partition wall; and a float valve. A valve seat is formed on a side of the valve chamber of the partition wall, and an opening is provided on an inner side of the valve seat. The opening includes a first opening and a second opening extending outward in a slit shape from an outer periphery of the first opening. A seal part having elasticity that contacts with and separates from the valve seat to close and open the first opening and the second opening, is disposed above the float valve.