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US 8,134,439 B2Granted
Solenoid
AssigneeDipl- Ing. Wolfgang E. Schultz
InventorsGeorg J. Scherer, Helmut J. Mang
Life of this patent
Estimating the term…
Abstract
A solenoid, in particular for switching pressure controllers or pressure valves, including an armature movable in an armature space, and a coil which can be impinged by current. When the coil is impinged by current, a magnetic field is generated serving for moving the armature, and the armature space can be filled with oil. For de-airing the armature space at least one de-airing channel is provided. In the de-airing channel at least one backflow-preventing element is provided which is permeable in the direction of de-airing.
Claims4
Solenoid for switching pressure controllers or pressure valves, comprising
- an armature movable in an armature space and a coil impingable by current,
- the coil generating a magnetic field serving for a movement of the armature when impinged by current,
- the armature space being fillable with oil,
- at least one de-airing channel for de-airing the armature space, and
- a flange located directly at one end of the coil, a backflow-preventing element being provided in a cavity of the flange, the cavity bordering the de-airing channel at the one end of the coil, the backflow-preventing element being a lip seal, the lip seal including a thickening in a direction of air flow, and the thickening being slotted, opposite to a direction of de-airing, the thickening being movable in the de-airing direction of air to allow air to move out of the de-airing channel and said thickening being movable to seal against backflow of air and soiling into the de-airing channel.
2 more elements
Dependencies are inferred from the claim text.