Supporting arrangement for a presentation device

Abstract

An arrangement for supporting a presentation device, for example in the form of an image presentation screen, wherein a work surface is connected to the supporting arrangement, wherein the supporting arrangement and the work surface are both vertically and transversely movable and pivotally disposed, and wherein the pivotal movement of the work surface is forcibly coupled to the angular movement of the supporting arrangement such as to achieve simultaneously a change in the angle of the supporting arrangement in relating to a stand on the one hand, and a change in the angle of the work surface in relation to the stand on the other hand, in response to the influence exerted by a maneuvering device.

1 - 12 . (canceled)  
   
   
       13 . A presentation device comprising: 
 a stand;    an image screen mounted to said stand;    supporting apparatus pivotably mounted to said stand;    a work surface mounted to said supporting apparatus, said work surface and said supporting apparatus being vertically and transversely movable, the pivotal movement of said work surface is forcibly coupled to the pivotal movement of said supporting apparatus; and    maneuvering means coupled to said stand so as to simultaneously change the angle of said supporting apparatus and the angle of said work surface in relation to said stand.    
   
   
       14 . The device according to  claim 13 , wherein the forced angular movement is controlled by a link mechanism.  
   
   
       15 . The device according to  claim 14 , wherein said link mechanism includes a pivotal frame which is pivotable about a bearing in said stand, a forwardly located link arm, a rearwardly located link arm and an attachment arm, wherein said rearwardly located link arm is connected to said pivotal frame through the medium of a rearwardly located link bearing, and wherein said forwardly located link arm is connected to said pivotal frame through the medium of a forwardly located link bearing.  
   
   
       16 . The device according to  claim 15 , wherein one end of said rearwardly located link arm is provided with a stand bearing, which is movable in a guide groove in the stand.  
   
   
       17 . The device according to  claim 16 , wherein said maneuvering means is adapted to cause displacement of said stand bearing in said guide groove.  
   
   
       18 . The device according to  claim 17 , wherein said maneuvering means has the form of a pneumatic piston-cylinder device, which is connected at one end to said stand bearing and at the other end to said stand.  
   
   
       19 . The device according to  claim 13 , and further comprising: 
 a vertically extendable leg support; and    a further maneuvering means;    wherein said supporting apparatus, said work surface, said maneuvering means, and said stand are mounted on an upper part of said leg support.    
   
   
       20 . The device according to  claim 14 , and further comprising: 
 a vertically extendable leg support; and    a further maneuvering means;    wherein said supporting apparatus, said work surface, said maneuvering means, and said stand are mounted on an upper part of said leg support.    
   
   
       21 . The device according to  claim 15 , and further comprising: 
 a vertically extendable leg support; and    a further maneuvering means;    wherein said supporting apparatus, said work surface, said maneuvering means, and said stand are mounted on an upper part of said leg support.    
   
   
       22 . The device according to  claim 16 , and further comprising: 
 a vertically extendable leg support; and    a further maneuvering means;    wherein said supporting apparatus, said work surface, said maneuvering means, and said stand are mounted on an upper part of said leg support.    
   
   
       23 . The device according to  claim 17 , and further comprising: 
 a vertically extendable leg support; and    a further maneuvering means;    wherein said supporting apparatus, said work surface, said maneuvering means, and said stand are mounted on an upper part of said leg support.    
   
   
       24 . The device according to  claim 18 , and further comprising: 
 a vertically extendable leg support; and    a further maneuvering means;    wherein said supporting apparatus, said work surface, said maneuvering means, and said stand are mounted on an upper part of said leg support.    
   
   
       25 . The device according to  claim 16 , wherein at least a part of said guide groove is rectilinear.  
   
   
       26 . The device according to  claim 17 , wherein at least a part of said guide groove is rectilinear.  
   
   
       27 . The device according to  claim 18 , wherein at least a part of said guide groove is rectilinear.  
   
   
       28 . The device according to  claim 19 , wherein at least a part of said guide groove is rectilinear.  
   
   
       29 . The device according to  claim 25 , wherein said guide groove extends selectively in a horizontal direction or defines an angle with the horizontal.  
   
   
       30 . The device according to  claim 25 , wherein said guide groove also includes a part which is angled in relation to said rectilinear part.  
   
   
       31 . The device according to  claim 30 , wherein said angled part of said guide groove is selectively rectilinear or includes part of the arc of a circle with its radius in the bearing of said pivotal frame.  
   
   
       32 . The device according to  claim 13 , wherein said maneuvering means is controlled by vertical or angular movements, or both, of the cushion or backrest, or both, of a chair.