Description  Claims  Drawing  Cited references 

WO61605829A   [0001] 
WO61605831A   [0001] 
DE102010017904A1   [0005] 
DE102008062763B3   [0005] 
US5072522A   [0005] 
US20030106236A1   [0005] 
US4253342A   [0017]