Abstract: A tank cap has a cap part, a filler neck for receiving a refueling nozzle wherein the neck can be closed by the cap part via a rotary closure having at least two seals arranged on the cap part and active between the cap part and the neck. The sealing surfaces on the neck are provided behind a raised region of a protuberance and below at least one projection.

Abstract: Device for preventing the overfilling of a fuel tank (1) provided with a filler neck and a filling vent line (6), an operational vent line (11), which leads to the outside or to a collecting tank, opening into the fuel tank above the opening into the filling vent line, in which operational vent line there is connected a valve device (13) which is closed during filling of the fuel tank and is open in the remaining time, the valve device having a valve closing member (13′) which can be engaged with a valve seat (19′) in the direction leading away from the fuel tank, is preloaded into the open position and is bridged, at least in the blocked state, by a flow-restricting partial-flow path (14), the valve seat (19′) for its part being movably mounted, forming a pressure relief valve clearance (25) with an inner shoulder (24) of the valve device (13), and being preloaded into the closed position and in the direction of the valve closing member (13′).

Abstract: Driving device for a closing arrangement of a vehicle-tank filler neck, having a housing (1), an input shaft (2), which is intended for the connection of a drive motor (3), an output shaft (5), which is intended for driving the closing arrangement, and a gear mechanism (11, 12) which is arranged in the housing (1) and acts between the input shaft (2) and the output shaft (5), the gear mechanism (11, 12) being a worm wheel/worm mechanism with a self-locking action in the direction from the output shaft to the input shaft, a clutch (13-17) being arranged between the gear mechanism (11, 12) and the output shaft (5), and a manual actuating arrangement (18-24) with a predetermined actuating travel being provided which, over a first part (FIGS. 3b-4b) of the actuating travel, moves the clutch (13-17) into the disengaged position and, over a second part (FIGS. 4b-4c) of the actuating travel, drives the output shaft (5).

Abstract: In motor vehicles with an onboard refueling vapor recovery (ORVR) system, a filling pipe with a reduced cross-section is provided. The pipe portion with reduced cross-sectional area has at least one longitudinally directed bead which gradually merges into the adjoining cylindrical regions to reduce flow resistance and prevent turbulent flow. The bead can be produced without impairing the strength of the filling pipe. When two or more beads are provided, they are preferably distributed equiangularly.

Abstract: A check valve for use in a filler pipe of a motor-vehicle fuel system, having a housing fixed in the interior of the pipe and a movably mounted flap closure which is opened by the flow of fuel through the filler pipe to the fuel tank, and closes again automatically when fueling stops. According to the invention, a configuration that is particularly favorable in terms of flow dynamics is provided wherein the flap closure comprises two valve flaps which are movably mounted jointly in the region of the center of the housing.

Abstract: Valve mechanism for controlling the fluid flows when refueling a fuel tank provided with a filler neck, having: a housing in which there are constructed a first opening, a second opening and a third opening; a valve member which is mounted movably in the housing between a first and a second position and has at least one sealing surface; a valve seat which in the housing is arranged between the openings and cooperates with the sealing surface(s) of the valve member in order, in the first position, to set up a first fluid connection between the first opening and the second opening, and a second fluid connection between the second opening and the third opening, and, in the second position, to interrupt the first and the second fluid connections; and a third fluid connection which is constructed in the housing between the second opening and the third opening and has a higher flow resistance than the second fluid connection.

Abstract: Closure cap for the acoustical indication of a predetermined torque being exceeded during securing, having a closure part which can be secured in a sealing manner on the opening; a gripping part for applying the torque; a rotational connection between the closure part and gripping part, which connection permits relative rotation between said two parts; springs which act between the closure part and gripping part in the direction of the relative rotation and subject the extent of the relative rotation to the torque applied; and at least one arrangement comprising a resilient tongue and a snap-in bead, one part of the arrangement being arranged the gripping part and the other part being arranged on the closure part, and at one point during the relative rotation the tongue, by being temporarily deflected, passing the snap-in bead.

Abstract: A cap assembly (4) for a filler neck, especially of a motor vehicle fuel tank, with a somewhat pot-shaped insert (7) insertable to form a seal for the end of the filler neck (1), having projections (6) at its outer periphery engaging in bayonet or threaded grooves (5) in the filler neck and covered at its upper end projecting from the filler neck by a cap (8), and fitted with an over/underpressure valve (11) which acts via apertures (35, 39) in the base of the insert (7) and in its upper end and/or in the cap (8) between the inside of the filler neck and the atmosphere. The entire insert (7) is pressed from sheet steel and the over/underpressure valve (11) is encapsulated in a valve housing (12) fitted in the insert (7) and having a peripheral flange secured by the folded edge (14) of the insert (7).