Makita Corporation

Dolmar Gmbh

Johannes Luegger

Carsten Ziegs

Harry Radel

Michael Schönfeld

Michael Schoenfeld

To create an internal combustion engine including a crankcase and a cylinder, wherein a piston is guided in the cylinder to perform a stroke movement and movably defines a combustion chamber, and wherein at least one transfer channel, through which ignition mixture is guided from the crankcase into the combustion chamber, is arranged in the cylinder, which leads to a further improvement of the exhaust gas quality and/or of the fuel consumption, in particular for creating an improved metering of ignition mixture into the fuel chamber, it is proposed for the piston to encompass a lower piston edge, which interacts with at least one counter body such that an inlet cross section of the transfer channel for the inflow of the ignition mixture from the crankcase into the transfer channel can be controlled by the stroke movement of the piston by the lower piston edge.

Internal combustion engine, in particular two-stroke internal combustion engine

In order to design a motor chain saw with a chain brake device releasable as a back kick brake and as a coasting brake comprising a tension lever ( ), movable with respect to the housing of the motor chain saw, which can be moved between a brake position (B) and a ready position (b), a release lever ( ) which can take up a coasting brake position (A) and a disengaging position (f), in combination with a supplementary brake device known as a coasting brake, it is proposed that the tension lever ( ) is placed linearly slidingly movable with respect to the housing of the motor chain saw and that the release lever ( ) is placed slidingly movable with respect to the tension lever ( ), whereby both axles of the sliding movement are parallel to each other.

Growing community of inventors

Hamburg, Germany

Johannes Luegger