Hilti Aktiengesellschaft

Jochen Kuntner

Albert Binder

Christoph Hakenholt

Chafic Abu Antoun

Dieter Profunser

Hanspeter Schad

Dario Bralla

Peer Schmidt

Serhey Khandozhko

Peter Brugger

Johann Dorfmeister

Guenther Sanchen

Klaus Raggl

Sherhey Khandozhko

Günther Sanchen

A power toolincluding a bit socketwhich is configured to hold a chiseling bitso that the latter can move along an axis of movement. A magneto-pneumatic striking mechanismincludes a primary drivethat is arranged around the axis of movementand that has a first magnet coil, a permanently and radially magnetizable ring magnetand a second magnet coilarranged consecutively in the striking direction. On the axis of movement, inside the magnet coils, the striking mechanismhas a strikerand a striking blockarranged consecutively in the striking direction. An air cushionacts upon the strikerin the striking direction

Power tool with magneto-pneumatic striking mechanism

The invention relates to a fastening tool comprising a handheld housing with a piston element (), which is received in the housing and which can be moved in a driven manner, for transmitting energy to a fixing element (). The piston element () is guided in a cylinder () and can be accelerated towards the fixing element () by a drive force, and the piston element () can be held in a starting position by a magnetic force of a retaining element (). The retaining element () has a first magnetically conductive stop () and a second magnetically conductive stop (). The magnetic stops () are connected by a magnetically conductive counter piece () arranged on a piston element when the piston element () is being held, and excitation magnet () is arranged between the magnetically conductive stops ().

Fastening tool with magnetic piston holder

A control method according for an impact wrench includes ascertaining whether the impact wrench applies an impact when the drive shaft rotates in a lower speed range. The speed of the drive shaft then is increased to a higher speed range as a function of an ascertained impact during the rotation in the lower speed range.

Impact wrench and control method for an impact wrench

A striking mechanism includes a working space whose first section is surrounded by a first electromagnet and whose second section is surrounded by a second electromagnet; a striking element that can move along a striking axis inside the working space and that has a magnetizable material; an anvil whose striking surface delimits the working space in the striking direction and which protrudes into the first magnetic coil and which is made of a magnetically soft material. A spring element is provided which exerts a force onto the striking element in every position in the working space in the direction of the anvil.

Striking mechanism and hand-held power tool

A screw has a head whose underside has impressions or embossings and faces towards the tip. The underside is divided into at least five sectors of the same size. Three-fifths of the sectors exhibit an identical pattern of impressions or embossings and at least one sector is provided with a different pattern of impressions or embossings or else with no impressions or embossings.

Screw and method to identify the screw

Growing community of inventors

Dornbirn, Austria

Jochen Kuntner