Patent ID: 6578818
Filing Date: 2003-06-17
Classification: F02M,F16K

Abstract:
A valve device (1), for tank ventilation in motor vehicles, comprising a valve housing (6, 7, 8) with an inlet fitting (10) and an outlet fitting (11), and armature (26) that is provided inside the valve housing (6, 7, 8) and is moved by means of an electromagnet (22), a closing body (40) that is connected to the armature (26) and closes a sealing seat (13) of the outlet fitting (11) when the electromagnet (22) is without power and opens the outlet fitting (11) when the electromagnet (22) is supplied with power whereby a free cross sectional area between the inlet fitting (10) and the outlet fitting (11) can be continuously changed, a spring element (50) which presses the closing body (40) with a pressure against the sealing seat (13), the spring element (50) having a spiral spring (49) which deforms exclusively in the direction of its longitudinal axis, even during a stroke motion of the valve device (1), said armature (26) having a fastening device (52) mounting the closing body (40) for movement with said armature, and a groove in said housing guiding same fastening device to secure the armature (26) against rotating around a longitudinal axis (5).