Motor-driven hand tool for drilling or impact drilling operation

Details Motor-driven hand tool for drilling or impact drilling operation Motor-driven hand tool for drilling or impact drilling operation

1986-09-11

1988-10-11

Kazenske, E. R.

Tool driving or impacting

Drive controlled by relative movement of advance causing or...

173123, 173170, B25D 1112, B25D 1600

Patent

active

047764066

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.

REFERENCES:
patent: 2479986 (1949-08-01), Thomas
patent: 2617971 (1952-11-01), Stack
patent: 3720269 (1973-03-01), Wanner et al.

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