Hilti Aktiengesellschaft

Klaus Raggl

Albert Binder

Chafic Abu Antoun

Michael Wierer

Christoph Boehm

Dario Bralla

Jochen Kuntner

Donato Clausi

Nikolaus Hannoschoeck

The invention relates to a hand tool machine for placing a nail having a push button that can be activate by a user for placing a nail. A combustion chamber is provided, in which a mixture of combustible gas and air can be ignited. In the combustion chamber, a piston is arranged in a movable manner in order to be accelerated by the combustion gases in the direction of placement. In the direction of placement, the piston has a punch protruding from the piston for driving the nail. A compressor compresses the air in the combustion chamber prior to igniting. The compressor has a fan wheel and an electric motor. At an operating speed of the electric motor, the fan wheel has a rotational speed of at least 2,000 rotations per second.

Control method for hand tool machine

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

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

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Zurich, Switzerland

Klaus Raggl