Hilti Aktiengesellschaft

Hans B&ouml;ni

Roland Schaer

Hans-Werner Bongers-Ambrosius

Harald Schmitzer

Andrey Jarosevic

Peter Fabo

A microcontroller for controlling operation of a safety clutch of a hand-held electrical power tool and which is arranged in a force transmitting chain of the tool, with the microcontroller including a unit ( ) for processing at least one parameter of the power tool and for outputting a resulting parameter in form of a calculated torque (M ), and a control unit ( ) for comparing an actually measured torque (M) with the calculated torque (M ), and for outputting a control signal (&thgr;) when a difference between the actually measured and calculated torques exceeds a predetermined threshold.

Microcontroller for and a method of controlling operation of the safety clutch of a hand-held electric power tool

The method of and a device for using this method, on equipment or assigned to equipment for working a material, for investigating and identifying the nature of the material, which is to be worked and for making available at least one operating parameter for the optimized pre-setting of the working equipment, provides for the use of a sensor, preferably assigned directly to the working tool, such as a hammer drill, in order to detect shock waves generated or induced in the tool. From the shock wave signal measured, at least one distinguishing feature characteristic of the material to be worked, is extracted and evaluated for the comparative classification of the material by means of an algorithm. Preferably, an external force, especially the contacting force, acting on the working equipment, is taken into consideration for the algorithmic evaluation.

Method and device for investigating and identifying the nature of a material

A method of determining a time-dependent gradient of a shock wave in a percussion or subjected to a percussion load ferromagnetic element and including subjecting the ferromagnetic element to action of a magnetic flux, providing a voltage measuring instrument associated with the ferromagnetic element for determining a change of a magnetic flux velocity, which is determined as a change in a measuring voltage, during a percussion action, and determining the gradient of the shock wave by additive superimposition of the measuring voltage; and a device for effecting the method.

Growing community of inventors

Buchs/SG, Switzerland

Hans Böni

Growing community of inventors

Buchs/SG, Switzerland

Hans B&ouml;ni

Hans Böni