Seat valve

Abstract

A diaphragm actuator has a first frame part and a second frame part, between which at least two diaphragm layers are disposed in a stacked manner and formed as electro-active polymer layers. Furthermore, a method for producing a diaphragm actuator is described.

1 . A diaphragm actuator which has a first frame part and a second frame part, and having at least two diaphragm layers which are disposed in a stacked manner and formed as electro-active polymer layers and are arranged between said first frame part and said second frame part. 
     
     
         2 . The diaphragm actuator as claimed in  claim 1  wherein said diaphragm layers are arranged so as to be immediately adjacent. 
     
     
         3 . The diaphragm actuator as claimed in  claim 1  wherein said first frame part contacts a first surface of said diaphragm layers and/or said second frame part contacts a second surface of said two diaphragm layers which is opposite to said first surface. 
     
     
         4 . The diaphragm actuator as claimed in  claim 1  wherein a first connecting part is provided which mechanically contacts said first surface of said diaphragm layers and/or wherein a second connecting part is provided which mechanically contacts said second surface of said diaphragm layers. 
     
     
         5 . The diaphragm actuator as claimed in  claim 4  wherein said first connecting part and/or said second connecting part is/are arranged centrally on said surface. 
     
     
         6 . The diaphragm actuator as claimed in  claim 1  wherein said diaphragm layers each have an opening which is provided centrally in said diaphragm layer. 
     
     
         7 . The diaphragm actuator as claimed in  claim 6  wherein said opening is circular. 
     
     
         8 . The diaphragm actuator as claimed in  claim 1  wherein said diaphragm layers have one of a circular or substantially rectangular shape. 
     
     
         9 . The diaphragm actuator as claimed in  claim 1  wherein at least one of said first and second frame parts has one of a circular or substantially rectangular shape. 
     
     
         10 . The diaphragm actuator as claimed in  claim 1  wherein at least one of said first and second frame parts is at least partially flexible. 
     
     
         11 . The diaphragm actuator as claimed in  claim 1  wherein said diaphragm layers each comprise at least one electrode. 
     
     
         12 . The diaphragm actuator as claimed in  claim 11  wherein said electrodes of directly adjacent diaphragm layers are disposed offset with respect to one another. 
     
     
         13 . The diaphragm actuator as claimed in  claim 1  wherein said first frame part has a first terminal and/or said second frame part has a second terminal. 
     
     
         14 . The diaphragm actuator as claimed in  claim 13  in combination with  claim 11  wherein said electrodes of said diaphragm layers are electrically contacted, wherein said electrodes of every second of said diaphragm layers are coupled to said first terminal and the other of said diaphragm layers are coupled to said second terminal. 
     
     
         15 . A method for producing a diaphragm actuator comprising the following steps:
 a) providing a first tool part, a first frame part and a polymer film made from an electro-active material.   b) disposing said first frame part on said first tool part,   c) clamping said polymer film,   d) mechanically expanding said polymer film,   e) fixing said polymer film on said first tool part, and   f) cutting said polymer film so that a diaphragm layer is produced.   
     
     
         16 . The method as claimed in  claim 15  wherein a step g) is carried out in which said electrode is attached to said diaphragm layer. 
     
     
         17 . The method of  claim 16  wherein step g) is being carried out after steps c) to e).  18 , The method as claimed in  claim 15  wherein steps c) to g) are carried out repeatedly in order to form a plurality of diaphragm layers. 
     
     
         19 . The method as claimed in  claim 15  wherein said electrodes of directly adjacent diaphragm layers are disposed offset with respect to one another. 
     
     
         20 . The method as claimed in  claim 15  wherein a second frame part is provided which is disposed on a side of said diaphragm layer which opposite to said first frame part. 
     
     
         21 . The method as claimed in  claim 15  wherein said polymer film is expanded unidirectionally or radially in step d). 
     
     
         22 . The method of  claim 21  wherein said polymer film is being expanded in a uniform manner. 
     
     
         23 . The method as claimed in  claim 15  wherein said first tool part is moved in step d) in order to mechanically expand said polymer film. 
     
     
         24 . The method as claimed in  claim 15  wherein a second tool part is provided which is likewise moved in order to expand said polymer film. 
     
     
         25 . The method as claimed in  claim 24  wherein said second tool part has a structure which substantially corresponds to said first frame part. 
     
     
         26 . The method of  claim 24  wherein said second tool part is positioned opposite said first frame part. 
     
     
         27 . The method as claimed in  claim 15  wherein said first diaphragm layer is fastened to said first frame part. 
     
     
         28 . The method of  claims 27  wherein said first diaphragm layer is fastened to said first frame part by one of an adhesive or welding method.  29 , The method as claimed in  claim 15  wherein said first tool part is a working table or a working drum which has a plurality of working surfaces. 
     
     
         30 . The method as claimed in  claim 15  wherein said first tool part formed as a working drum is rotated about an axis of rotation and so a polymer film portion of said polymer film allocated to a working surface is supplied to different working stations.