Hilti Aktiengesellschaft

Nikolaus Hannoschoeck

Christoph Boehm

Peter Bruggmueller

Donato Clausi

Ulrich Schiestl

Hans Gschwend

Albert Binder

Michael Wierer

Dario Bralla

Serhey Khandozhko

Klaus Raggl

Rosa Maria Gonzalez

In a control method for a hand-held power tool, a striking mechanism is driven with an electric motor, wherein an exciter piston of the pneumatic striking mechanism is driven periodically by the electric motor and a striking piston of the striking mechanism is coupled to the exciter piston via a pneumatic chamber. The method includes detecting the acceleration of a machine housing along a striking direction of the striking piston in different phases of the movement of the exciter piston; and controlling a rotational speed of an electric motor according to the detected acceleration in the different phases.

Hand-held power tool

A drive-in tool comprises a hand-held housing having an energy-transmitting element accommodated therein for transmitting energy to a fastener to be driven in; and a drive apparatus for driving the energy-transmitting element; wherein the drive apparatus comprises an energy accumulator having a gas chamber, which gas chamber can be filled with a driving gas at a defined overpressure, wherein the overpressure in the gas chamber is present as stored driving energy before a drive-in process is triggered, and wherein a piston of the energy-transmitting element forms a variable wall segment of the gas chamber, wherein the gas chamber has at least one further variable wall segment for changing the chamber volume, wherein a movement of the variable wall segment that enlarges the chamber volume charges a mechanical energy accumulator.

Drive-in tool having a pneumatic accumulator

A driving-in apparatus comprises a hand-held housing having an energy transmission element accommodated therein for transmitting energy to a fastening element to be driven in, and a drive device for driving the energy transmission element, wherein the drive device comprises an energy accumulator having a gas chamber which is fillable with a driving gas at a defined overpressure, wherein the overpressure is present in the gas chamber as stored driving energy prior to initiation of a driving-in operation, and wherein a piston of the energy transmission element forms a variable wall section of the gas chamber. The apparatus also includes a heating member providing thermal energy that is transferable into the driving gas enclosed in the gas chamber.

Driving-in apparatus having a heated pneumatic accumulator

The invention relates to a hand-held machine tool for setting a nail, having a safety mechanism which can be actuated by a user and a button which can be actuated to trigger a setting of the nail. A mixture of flammable gas and air can be ignited in a combustion chamber. A piston is movably arranged in the combustion chamber in order to be accelerated in the setting direction by the combustion gases. There is a stamp on the piston for driving the nail. A compressor for compressing the air in the combustion chamber is directly connected to the combustion chamber via a channel. A valve which connects the channel or the combustion chamber to the environment is opened between the actuating of the safety mechanism and the actuating of the button.

Control method for hand-held machine tool

A combustion-engined setting tool for driving fastening elements in a constructional component includes at least one combustion chamber () for receiving an oxidant-fuel gas mixture, a piston guide () located adjacent to the combustion chamber (), and in which a drive piston () for driving the fastening elements in is displaceable by combustion gases, a ventilator for creating turbulence in the combustion chamber (), and a compression device () for compressing gases fed into the combustion chamber () and driven by the ventilator drive ().

Growing community of inventors

Grabs, Switzerland

Nikolaus Hannoschoeck