Abstract: A protective cover of a hand-held cut-off machine has a cover member having an interior. At least two injection nozzles for spraying a cooling liquid into the interior are arranged on the cover member. A supply line for supplying the cooling liquid to the at least two injection nozzles is provided. A bow is arranged outside of the cover member. The supply line has a line section that extends from a first injection nozzle to a second injection nozzle through the bow.

Abstract: A handheld work apparatus has an internal combustion engine (14, 44, 94) which has a crankshaft (15, 45, 95) which, in turn, drives a work tool of the work apparatus. The work apparatus has a first component group which includes the crankshaft (15, 45, 95) and which is driven in a first rotational direction (10, 40, 70, 90). In order to hold the gyroscopic forces low which act during operation, the work apparatus has a second component group which includes the work tool and which is driven in a second rotational direction (11, 41, 71, 91) opposite to the first rotational direction (10, 40, 70, 90).

Abstract: A protective cover for a cutting wheel of a hand-held cut-off machine driven by an internal combustion engine has a circumferential wall and two opposed sidewalls adjoining the circumferential wall. The circumferential wall and the two sidewalls are a monolithic component made of cast light metal. The circumferential wall in a circumferential direction has at least over sections thereof a first integral thicker portion. The two sidewalls are thinner than the first integral thicker portion. Preferably, the protective cover is made of diecast magnesium.

Abstract: A protective cover for a cutting wheel of a hand-held cut-off machine driven by an internal combustion engine has a circumferential wall and two opposed sidewalls adjoining the circumferential wall. The circumferential wall and the two sidewalls are a monolithic component made of cast light metal. The circumferential wall in a circumferential direction has at least over sections thereof a first integral thicker portion. The two sidewalls are thinner than the first integral thicker portion. Preferably, the protective cover is made of diecast magnesium.

Abstract: A protective cover of a hand-held cut-off machine has a cover member having an interior. At least two injection nozzles for spraying a cooling liquid into the interior are arranged on the cover member. A supply line for supplying the cooling liquid to the at least two injection nozzles is provided. A bow is arranged outside of the cover member. The supply line has a line section that extends from a first injection nozzle to a second injection nozzle through the bow.

Abstract: The invention relates to an intake arrangement (1) for the combustion air (2) of an internal combustion engine (3) of a handheld portable work apparatus (4), such as a cutoff machine, motor-driven chain saw or the like. An air filter (5) is provided for purifying the combustion air (2). Dust-laden combustion air is directed onto the air filter via openings (6) of a filter housing (7). The combustion air (2) is purified by the air filter (5) and is drawn by suction by the engine (3) via an intake pipe (25) of a carburetor (8). A carrier airflow (10) is provided in a flow channel (15) for continuously or intermittently transporting away dust (11) deposited on the air filter (5). The combustion air (2) and the carrier airflow (10) are spatially separated via a discharge tube (13). In this way, a minimization of the dust load of the air filter (5) is ensured on the one hand and a continuous transport away of the dust (11) from the air filter (5) is ensured on the other hand.

Abstract: The invention relates to an intake arrangement (1) for the combustion air (2) of an internal combustion engine (3) of a handheld portable work apparatus (4), such as a cutoff machine, motor-driven chain saw or the like. An air filter (5) is provided for purifying the combustion air (2). Dust-laden combustion air is directed onto the air filter via openings (6) of a filter housing (7). The combustion air (2) is purified by the air filter (5) and is drawn by suction by the engine (3) via an intake pipe (25) of a carburetor (8). A carrier airflow (10) is provided in a flow channel (15) for continuously or intermittently transporting away dust (11) deposited on the air filter (5). The combustion air (2) and the carrier airflow (10) are spatially separated via a discharge tube (13). In this way, a minimization of the dust load of the air filter (5) is ensured on the one hand and a continuous transport away of the dust (11) from the air filter (5) is ensured on the other hand.