Other

Festo Ag & Co

Markus Hoffmann

Michael Weinmann

Karl Lubitz

Martin Maichl

Michael Riedel

Andreas Joseph Schmid

Rolf Berger

Wolfgang Soblik

Martin Godel

Michael Jentschke

J&uuml;rgen Stingel

A piezoelectric bending transducer includes a support body, a stack of piezo-ceramic layers, arranged thereon and flat electrodes arranged between the layers. On the side of the support body facing the stack, an adaptation layer is arranged with essentially the same coefficient of expansion as the piezo-ceramic. The bending transducer displays a good actuating power and a low thermal natural distortion with economical production costs. The transducer is particularly suitable for application in a valve.

Piezoceramic bending transducer and use thereof

A piezoelectric flexural transducer having an elongated support body ( ) which on at least one longitudinal side is provided with a piezoelectric unit ( ). The piezoelectric unit ( ) has one or more piezoelectric material layers ( ) and electrodes ( and ) associated with same. Furthermore, the piezoelectric unit ( ) includes an electrically insulating coating surrounding the body ( ) right round it, the section ( ) of the coatings lying between the piezoelectric body ( ) and the support body ( ) being provided with one or more electrically conductive vias ( and ). The latter provide the necessary electrical connection between the electrodes ( and ) and the support body ( ).

Piezoelectric flexural transducer and use thereof

A piezoelectric flexural transducer having an elongated support body ( ), that on at least one longitudinal side is provided with a piezoelectric multi-layer body ( ). In the interior of the support body ( ) and/or between the support body ( ) and the piezoelectric multi-layer body ( ) and/or between neighboring piezoelectric material layers of the piezoelectric multi-layer body ( ) at least one component ( and ) of an electronic ( ) and/or sensor ( ) system is accommodated employed for the operation of the piezoelectric flexural transducer.

Piezoelectric bending transducer and use thereof

A valve means which comprises a control chamber in a valve housing and into which several fluid duct open. In the control chamber there is at least one pivoting control rocker member serving for the control of at least one of the fluid duct openings and able to be moved between two terminal positions, one pivotal position of such control rocker member being influenced by an electrically activated flexible element. The flexible element may act within the control chamber on an actuating part of the control rocker member. The latter is biased by spring means into a first terminal position, the flexible element engaging the actuating portion of the control rocker member in the electrically non-excited state mechanically free of stress and without any spring bias.

Valve means

A drive device comprising at least one drive unit having two mutually spaced apart pressing bodies. On the pressing bodies mutual facing pressing faces are provided diverging in a drive direction and having between them a stroke unit engaging the pressing faces of both pressing bodies. Furthermore drive means are present by means of which a drawing together of the pressing bodies may be caused and, as a result of this a displacement of the stroke unit in the drive direction along the pressing faces for the purpose of producing a drive movement able to be externally employed.

Drive device

A control member for a piezo-valve having an elongated flexible element, which at one of its two axial ends has a respective sealing face on oppositely placed longitudinal side faces. The two sealing elements are a common component of a sealing body, which possesses a connecting section extending between the two sealing elements and formed integrally with same, such connecting section having an opening of the flexible element extending through it. The two sealing elements overlap the marginal section, delimiting the opening, of the flexible element and in the peripheral part of the opening engage the respectively associated longitudinal side face of the flexible element.

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Wolfschlugen, Germany

Markus Hoffmann