| 摘要 |
<p>A device for limiting the filling of, and for applying air to and removing it from containers, in particular fuel tanks of motor vehicles, whereby part of the container volume serves as a pressure compensation space (19) to allow for temperature fluctuations, and the device possesses an air injection or removal system which opens into the air injection or removal spout (11, 110) and has a filling vent (14) which determines the still permissible maximum liquid position (18) and an operating venting system (15, 16) which is responsible for injecting air into or removing it from the pressure compensation space (19) in such a way that the operating venting system is closed by spring action (42, 133) when the tank filler cap (44, 141) is put in position against the force of the spring. To control the operating venting system (15, 16) there is a valve (35, 35a, 123) integrated in the air injection and removal line (14, 15, 16, 27), the body (39, 127) of the valve being movable against the resistance of a spring (42, 133) by a piston rod (40, 128). The valve (38) is arranged in such a manner in the filler spout (11, 110) that the piston rod (40, 128) lies parallel or essentially parallel to the wall of the filler spout (11, 110) inside the latter, and projects with its free end from the filler spout when the filler cap is removed. Such an air injection and removal device is characterized by the fact that it is simple and inexpensive to produce and at the same time offers considerable operating safety. Furthermore, it advantageously enables the incorporation of a separate valve in the form of a so-called roll-over valve.</p> |
