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: 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.