Piezoelectric actuator with a sheathing composed of a composite material
AssigneeDaimler AG
InventorsRainer Capellmann, Gregor Renner, Holger Stark
Life of this patent
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Abstract
A piezoelectric actuator for flowing-around media, with a piezo element arranged between two end caps. The piezo element is surrounded by a ring-shaped sheathing connected to the end caps. The sheathing consists, at least in portions, of a composite material with at least two layers, at least one layer consisting of a metallic material and at least one layer consisting of a polymer.
Claims6
A piezoelectric actuator for flowing-around media, said actuator comprising:
- a piezo element arranged between two end caps;
- and
- a ring-shaped sheathing which is connected on its end faces to the end caps, and which, at least in regions, surrounds the piezo element;
- wherein,
- the sheathing consists, at least in portions, of a composite material with at least two layers;
- at least one layer is made of a metallic material;
- at least one layer is made of a polymer;
- and
- the composite material contains at least one layer made of pure aluminum or of an aluminum alloy.
A piezoelectric actuator for flowing-around media, said actuator comprising:
- a piezo element arranged between two end caps;
- and
- a ring-shaped sheathing which is connected on its end faces to the end caps, and which, at least in regions, surrounds the piezo element;
- wherein,
- the sheathing consists, at least in portions, of a composite material with at least two layers;
- at least one layer is made of a metallic material;
- at least one layer is made of a polymer;
- the sheathing comprises a sleeve which is provided in locally delimited regions with perforations;
- the perforations are spanned by an elastic and expandable film connected sealingly to the sleeve;
- and
- the sleeve is made of a composite material with at least one metallic layer and with at least one polymer layer.
A piezoelectric actuator for flowing-around media, said actuator comprising:
- a piezo element arranged between two end caps;
- and
- a ring-shaped sheathing which is connected on its end faces to the end caps, and which, at least in regions, surrounds the piezo element;
- wherein,
- the sheathing consists, at least in portions, of a composite material with at least two layers;
- at least one layer is made of a metallic material;
- at least one layer is made of a polymer;
- the sheathing comprises a sleeve which is provided in locally delimited regions with perforations;
- the perforations are spanned by an elastic and expandable film connected sealingly to the sleeve;
- and
- the film is made of a composite material with at least one metallic layer and with at least one polymer layer.
Dependencies are inferred from the claim text.