Andreas Stihl Ag Co. Kg

Stabilus Gmbh

Daniel Herbst

Georg Maier

Wolfgang Layher

Dirk Schweinberger

Frank Berbig

Klaus-Martin Uhl

Rolf Mintgen

Heiko Rosskamp

Volker Reber

Axel Knopp

Harald Mang

Rainer Massmann

Stefan Bonnekessel

Karl-Heinz Darscheid

Alexander Erkert

Sebastian Hansen

Joachim Völlinger

Marcus Saak

Torsten Rickenberg

Jörg-Erwin Scheuer

A water supplying device of a hand-held power tool has a water-conveying line and a valve arrangement arranged in the line for controlling the water flow through the line. The valve arrangement has a control valve with a valve body adjustable across a positioning travel. The opening cross-section of the control valve, as a function of the positioning travel, has a progressive characteristic line. An arrangement for actuating the water supplying device has an actuator that is separate from additional control elements of the power tool.

Water supply for a hand-held power tool

A spring system has a first pulling part with a first fastening element connected by a tension spring to a second pulling part with a second fastening element. The pulling parts are moveable relative to one another so as to increase or relieve stressing on the tension spring. A damping device damps the movement of the pulling parts in relation to one another. A cylinder is fastened on the first pulling part and a piston 3 is axially displacesably arranged therein, subdividing the interior of the cylinder into a first cylinder chamber and a second cylinder chamber. A piston rod connected to the piston is arranged on the second pulling part. The interior of the cylinder is connected to the surroundings via one or more restrictor openings.

Spring system

A device for supplying water to a cutting wheel of a hand-held cut-off machine has a water-conducting line and a valve arrangement arranged in the line. The valve arrangement has a shut-off valve for controlling the water flow flowing through the line. The shut-off valve is actuated as a function of an operating signal of the cut-off machine such that in operation of the cut-off machine the water flow through the line is released by the shut-off valve. The shut-off valve interrupts the water flow through the line when the operating signal is absent.

A portable handheld work apparatus has a drive motor as well as an adjusting element for controlling the drive motor. The work apparatus has at least one actuating element. A movement of the actuating element is transmitted to the adjusting element via a transmitting unit. A good operator control is achieved when at least one transmitting characteristic () of the transmitting unit runs nonlinearly as a function of the actuating displacement (s) of the actuating element.

Portable handheld work apparatus

Growing community of inventors

Karlsruhe, Germany

Daniel Herbst