Cooper Industries, Inc.

Cooper Power Tools Gmbh + Co.

Wolfgang Josef Alender

Heinz-Gerhard Anders

Hermann J Leuthner

A screwdriver comprises at least one housing and a rotatably driven screw-tightening tool projecting beyond said housing. For improving the screwdriver in such a way that, even under poor illumination conditions, it can be used safely and accurately without any additional expenditure of work on the part of the user, an illumination means is arranged at least partially on the housing especially for illumination in the direction of the location of use of the screw-tightening tool.

Screwdriver

A power screwdriver or nutsetter has an output shaft provided with a torque measuring transducer and a shaft rotation angle transducer mounted thereon. Tool output torque or final turning of a screw or nut can be measured directly and transmitted to a control unit through a shaft mounted slipring assembly. In one embodiment a bevel gear drive is connected to the output shaft and a force measuring transducer is mounted between the shaft and the tool housing for measuring gear reaction forces corresponding to tool output torque.

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Aalen, Germany

Wolfgang Josef Alender