Festo Ag & Co

Other

Argillon Gmbh

Michael Weinmann

Martin Maichl

Markus Hoffmann

Michael Riedel

Andreas Joseph Schmid

Karl Lubitz

Gebhard Munz

Peter Post

Herbert Vollmer

Kurt Stoll

Helmut F Schlaak

Hannes Wirtl

Metin Giousouf

Herbert Frisch

Andreas Muth

Rolf Berger

Stefan Klump

Heinz K&uuml;ck

Hans Scheurenbrand

Frank P&ouml;hlau

J&uuml;rgen Sestak

Hubert Kr&auml;mer

Udo T&ouml;pfer

Markus Hoffman

Andreas Münzenmaier

J&uuml;rgen Stingel

Wolfgang Soblik

Carsten Pein

Michael Jentschke

Wolfgang Eberhardt

A flexural actuator is fitted with an actuator means, the flexural actuator being fitted at its functional section with a sensor means for determination of the longitudinal stretch. This sensor means is placed at a position, and/or is placed in the longitudinal direction symmetrically on either side of such position, at which there is a constant longitudinal stretch independent from the setting force when the functional section is thrusting against a resistance.

Flexural actuator and an actuator means fitted with same

A method for the manufacture of a valve having at least one valve opening surrounded by at least one valve seat and an elongated valve member able to be brought into different positions by pivoting. In order to adjust the switching stroke of the valve member the valve member is, for instance using a laser, locally and briefly heated until superficial plastification occurs so that in the direction of the pivoting movement performed in operation it experiences a permanent flexural deformation.

Method for the production of a valve

A valve means having at least one microvalve secured in a substrate structure. For holding it in position the microvalve is clamped in rubber-elastic substrate material of the substrate structure. As a result simple and economic fitting of the valve is possible.

Valve means

A piezoelectric valve whose housing defines a valve chamber wherein at least one piezoelectric flexural transducer is located. The piezoelectric flexural transducer possesses a contact face, which faces a first outer wall of the valve housing. This first outer wall is in the form of a wiring support which possesses a support body consisting of plastic material, which at the outer side opposite to the valve chamber bears a wiring arrangement. The wiring arrangement is in electrical contact by way of a via extending through a cutout in the support body with the piezoelectric flexural transducer, since the via consists of an electrically conductive elastic plug, against which the at least one contact face is thrust at the inner face of the support body.

Piezoelectric valve

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 microvalve, which contains a valve member ( ) dividing a valve chamber ( ) into two chamber parts ( and ). A first chamber part ( ) is delimited by a duct layer ( ), which has an input flow opening ( ) and at least one output flow opening ( and ). Fluid transfer between the input flow opening ( ) and the output flow opening ( and ) may be controlled by the valve member ( ). Furthermore pressure relieving means are provided which are effective in the open position of the valve member ( ), such means comprising at least one expansion recess ( ) provided on the valve member and with at least partial overlap opposite to the output flow opening ( and ), same permitting an expansion of the transferring fluid. It is connected through valve member ( ) with the second chamber part ( ) so that a counter pressure may build up here causing the relief of pressure.

Microvalve

A piezo valve having a flexural transducer unit which includes two flexural transducers adapted to be deflected in opposite directions. The flexural transducers are fixedly joined together at one terminal part of the flexural transducer unit with the formation of a common bearing section. The flexural transducer unit is pivotally mounted in relation to the housing. At least one flexural transducer serves for the control of a valve opening associated with it, the other flexural transducer being able to be biased by the application of a drive voltage toward a support face arranged in a deflection path in order to for instance to increase the displacement path of the other flexural transducer.

Piezo valve

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.

A microvalve array, which possesses a plurality of microvalves ( ) produced by microfabrication. It is furthermore provided with an electronic control means ( ), which comprises at least one function preset unit ( ) for the programmed grouped functional linking of the microvalves ( ). A fluid ducts system ( ) is connected with the microvalves ( ), the fluid ducts ( &prime;; and &prime;) of such system being individually connected for customization, starting with a standardized arrangement in a fashion dependent on the functional valve linking, predetermined by the function preset unit ( ) by opening and/or closing of passages.

Microvalve battery

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.

Control member for a piezo-valve

A micro-valve arrangement whose micro-valve has a housing containing two opposite housing layers, between which a valve chamber is delimited, wherein a valve member is located. A fluid duct extending in one housing layer opens into the valve chamber and is controlled by the valve member. By means of an electrically operated actuator it is possible for the position of the valve member to be predetermined. Furthermore a position detector is present, which on the basis of the measured capacitance of a capacitor renders it possible to find the position of the valve member. This capacitor comprises two capacitor faces which are provided opposite to each other in the direction of motion of the valve member and on one of the housing layers.

Growing community of inventors

Plüderhausen, Germany

Michael Weinmann