Peter Hellmann

Method of and apparatus for preventing accidents during working with hand-held tools with a rotatable working tool

Switching device for multifunctional hand-held machine tool

Safety circuit for a rotary electric hand tool

Safety module for a multifunctional handheld tool

Method and device for handheld machine tools to prevent accidents caused by tool blockage

Safety clutch for electrical hand-held tool

Safety switch device for a rotary powered hand tool

Circuit and process for regulating the speed of universal electric motors

Safety device for multi-function handtool

Handheld electrical power tool has direct current voltage intermediate circuit with two intermediate circuit capacitors to increase useful network voltage operating range