Motor-driven hand tool for drilling or impact drilling operations
AssigneeRobert Bosch GmbH
InventorKarl Wanner
Life of this patent
Estimating the term…
Abstract
A motor-driven hand drill includes a housing, in which between a motor and a drill receptacle, a safety coupling for limiting a torque, applied to a drill, is positioned. For specific conditions, for example for drilling in armoring iron, the torque applied to the drill must be increased. The drill is provided with an electro-magnetic device which is operatively connected to the safety coupling to adjust the limiting torque applied to the drill. The magnetic device is actuated by means of a pushbutton positioned in the same gripping region as the pushbutton for actuating an electric motor of the drill to switch the same on and off.
Claims7
A motor-driven hand tool for drilling and impact-drilling operations, comprising a drive;
- a safety coupling operatively connected to said drive and translating a torque from said drive to a drill and limiting a translation torque applied to a drill;
- a hand grip having a gripping area;
- a first pushbutton positioned in said gripping area and actuated by an operator for switching on and off a motor of the tool;
- means for adjusting said torque and including an adjusting element which acts upon said safety coupling so as to increase said torque translated by said safety coupling;
- and a second pushbutton provided on said hand grip and operative for actuating said adjusting means so that by actuating of said adjusting element by said second pushbutton the adjusting element acts upon said safety coupling.
A motor-driven hand tool for drilling and impact-drilling operations, comprising a drive;
- a safety coupling (17) operatively connected to said drive and translating a torque from said drive to a drill and limiting a translation torque applied to a drill;
- a hand grip (3) having a gripping area;
- a first pushbutton (24) positioned in said gripping area and actuated by an operator for switching-on-and-off a motor of the tool;
- means (19) for adjusting said torque, said safety coupling and said adjusting means being formed so that said translated torque is increasable thereby;
- and a second pushbutton (22) for actuating said adjusting means, said second pushbutton being positioned in said gripping area.
Dependencies are inferred from the claim text.