Beschreibung     Ansprüche     Zeichnung  

DE202006014216U1   [0004] 
DE102009015503B4   [0005] 
EP0598986A1   [0006] 
US4085808A   [0007] 
FR2689479A1   [0007] 
EP0083759A2   [0008] 
GB2255814A   [0008] 
WO2016062664A1   [0009]