Robert Boschgmbh

Joerg Albrecht

Adolf Zaiser

Juergen Stoeger

Juergen Wiker

Rudolf Fuchs

Jens Ulbrich

Michael Soellner

Peter Ibele

Christoph Cramer

Josef Wehberg

Wolfgang Hirschberger

Violaine Holtzmann

Joao Jorge Bergner

Nuray Tekogul

The handheld power saw includes a drive mechanism with a lifting rod; a saw blade with an elongated recess in a guide region thereof and a retaining region with a T-shaped extension; a coupling device for retaining and driving the saw blade located on the lifting rod, which includes a clamping sleeve configured to receive the T-shaped extension to connect the saw blade to the lifting rod; a guide assembly for guiding oscillatory motion of the saw blade, which includes two lateral bracing devices arranged on opposite sides of the saw blade that shield the coupling device from shear forces; a pressure roller supported on a bolt, which is arranged to bear on an edge of the saw blade and a pressure bolt arranged in the elongated recess to directly guide the saw blade.

Handheld power saw

A portable power tool has at least one housing part () and a guide channel () for carrying chips and/or abrasive particles away from a working area (). At least one wall region () of the guide channel () is movable relative to the housing part () for cleaning purposes.

Portable power tool with a guide channel

An electronic control device for an electric motor (10), particularly an electrically commutated (EC) motor, whose motor windings (11 to 13), in order to control the winding current, are connected in series with respective control transistors (15 to 17) whose control connections are charged by control pulses which are triggered by commutation signals and which have a predeterminable pulse-duty factor (block control). At the same time, the control device varies the amplitudes of the control pulses to control and permit the operation of the control transistors (15 to 17) in their amplifying range (linear control). Block control dominates in the upper rpm range in order to improve efficiency with respect to pure linear control, and linear control dominates in the lower rpm range in order to prevent severe current peaks, and hence an increased noise development that would occur with pure block control.

Electronic control device for an electronically commutative motor

Growing community of inventors

Wolfschlugen, Germany

Joerg Albrecht