Robert Bosch

Heinz Walz

Steffen Wunsch

Peter Stierle

Fritz Schadlich

Erich Borst

Gunter Zilly

Albert Ruess

Vinzenz Harle

Brigitte Hertell

A device for clamping sandpaper to a sanding plate of a vibration sander has a spring-loaded clamping member for holding the sandpaper, the clamping member having a handle part for actuation and being holdable on the sanding plate so as to be swivelably arranged optionally in a clamping position, and disengaged position, the clamping member being formed as a bistable flip-flop mechanism.

Device for clamping sandpaper on a vibrating sander

Hand sander

A torque limiting power screwdriver includes a housing in which there is supported for rotation and axial displacement a screwdriver spindle. A transmission transmits power from a motor to the screwdriver spindle. A torque overload coupling and a separating coupling are interposed in the transmission, being operative for interrupting the transmission of torque from the motor to the screwdriver spindle. The separating coupling is coupled and uncoupled in response to axial displacement of the screwdriver spindle between its coupling and uncoupling positions. The axial movement of the spindle is accomplished by a trigger movably mounted on the housing and connected by a Bowden cable or a lever transmission to the spindle. The spindle is connected by an axially movable coupling with an output member, especially with a bevel gear transmission accommodated in an angular head housing portion. A switching trigger is used to energize and de-energize the motor. The trigger and the switching trigger can be combined into a trigger unit, thus making possible one-hand operation. The trigger and switching trigger are so constructed and arranged that they force the succession of energization of the motor and coupling of the separating coupling during the commencement of operation, and the succession of uncoupling the separating coupling and de-energization of the motor during the termination of operation.

Torque limiting power screwdriver

A power screwdriver has a drive motor and a tool holder arranged in a housing, a driving coupling including a driving coupling part driven by the motor and a driven coupling part, and a locking coupling arranged between the driving coupling and the tool holder, wherein the couplings are arranged so that when the tool holder is pressed against a screw the coupling parts of the driving coupling are connected with one another and torque from the motor is transmitted to the tool holder in a normal manner, when thereafter a limit torque is attained the locking coupling is overrun, the driving coupling part of the driving coupling is arrested, and the driven coupling part of the driving coupling is disconnected from the driving coupling part, and when the tool holder is pressed stronger against the screw which is difficult to screw in the driven coupling part displaces and follows the driving coupling part and is again connected with the latter so as to again provide for transmission of the torque from the motor to the tool holder.

Power screwdriver

Growing community of inventors

Stuttgart, Germany

Heinz Walz