Patent ID: 6176162
Filing Date: 2001-01-23
Classification: B25B

Abstract:
A power-driven screwdriver comprising:a housing comprising means for receiving a depth stop;a tool drive shaft, arranged axially displaceably within said housing and having a first and a second end;a tool receptacle arranged at said first end of said tool drive shaft;a drive shaft;a motor-driven drive gear, arranged on said drive shaft rotatably and axially displaceable, said drive gear having a first side facing toward said tool receptacle, and having a second side opposite said first side;an intermediate ring mounted rotatably on said drive shaft and having a first side facing toward said drive gear, and a second side;a cam ring mounted rotatably on said tool drive shaft and having a first side facing toward said intermediate ring, and a second side;first cam elements arranged on said drive gear and coacting with second cam elements arranged on said first side of said intermediate ring;third cam elements arranged on said second side of said intermediate ring and coacting with associated fourth cam elements arranged on said cam ring;first catch elements arranged on said intermediate ring;second catch elements arranged on said cam ring and coacting with said first catch elements;a throwout ring mounted on said tool drive shaft axially displaceably against a resilient means;a first spring element arranged between said cam ring and said throwout ring for preloading said cam ring in a direction toward said drive gear;a second spring element, supported between the housing and said second side of said drive gear;first claw elements, arranged on said throwout ring; andsecond claw elements arranged on said second side of said cam ring and coacting with said first claw elements.