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US 6,578,818 B1Granted
Valve device
AssigneeRobert Bosch GmbH
InventorsErwin Krimmer, Wolfgang Schulz, Tilman Miehle
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AssigneeRobert Bosch GmbH
InventorsErwin Krimmer, Wolfgang Schulz, Tilman Miehle
Estimating the term…
The current invention relates to a valve device (1), in particular for tank ventilation in motor vehicles, having a valve housing (6, 7, 8) with an inlet fitting (10) and an outlet fitting (11), having an armature (26) that is provided inside the valve housing (6, 7, 8) and can be moved by means of an electromagnet (22), having 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 it when the electromagnet (22) is supplied with power wherein the free cross sectional area between the inlet fitting (10) and the outlet fitting (11) can be continuously changed, and having a spring element (50) which presses the closing body (40) with a slight pressure against the sealing seat (13). In order to assure a reliable seal of the sealing seat (13) in a simple manner, according to a first embodiment according to the invention, the spring element (50) is comprised of a leaf spring (48) which is connected on the one end to the armature (26) and on the other end to the closing body (40) and furthermore, is pre-stressed against the closing body (40). As an alternative embodiment possibility, a spring element (50) with a spiral spring (49) is proposed, which deforms exclusively in the direction of its longitudinal axis even during the stroke motion of the valve device (1).
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).
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), a free cross sectional area between the inlet fitting and the outlet fittings, an 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), the closing body being connected to and supported on the armature (26) only by a (leaf spring) element (48, 50) and closing a sealing seat (13) of the outlet fitting (11) when the electromagnet (22) is without power and opening the outlet fitting when the electromagnet (22) is supplied with power whereby the free cross sectional area between the inlet fitting (10) and the outlet fitting (11) can be continuously changed, the armature (26) having a flat surface (47) whose plane is oriented obliquely relative to a plane of the sealing seat (13) and the closing body (40), said spring element (50) engaging and pressing the closing body (40) with a pressure against the sealing seat (13) and having a leaf spring (48), which is connected on one end to the oblique flat surface (47) of the armature (26), and on another end to the closing body (40), wherein the leaf spring (48) is pre-stressed in such a way that the leaf spring presses the closing body (40) against the sealing seat (13).
Dependencies are inferred from the claim text.