Description  Claims  Drawing  Cited references 

CN201966324U   [0006] 
US20140071009A1   [0007] 
EP1950831A1   [0008] 
US20020175874A1   [0009] 
US7358912B1   [0011] 
US20140022131A1   [0012] 
US20090153423A1   [0013]