Abstract: In order to create an engine more preferably for a small working machine, for example for garden, forest and landscape work or for an engine-operated tool and the like, with a carburettor unit for mixture provision, in which carburettor unit via an inlet pipe is connected with a cylinder of the engine, wherein the cylinder extends along its piston running direction from its crankcase side as far as to its head end, and wherein a holding device is provided which serves for the mechanical holding of at least the carburettor unit and at least comprises an elastic element with an improved arrangement of the carburettor unit and easy removability of the carburettor, i.e.

Abstract: A motor-driven implement such as a hand-held tool or device for garden and landscape maintenance, includes an internal combustion engine having at least one cylinder and at least one carburettor, which is disposed in a carburettor chamber, is separated by an intermediate wall from an engine compartment. A housing is provided which at least partially encloses the engine compartment so that an upper part of the cylinder extends in the direction of the housing, and a fan wheel is further provided by which means air from the engine compartment can be introduced through a warm air opening in the intermediate wall into the carburettor chamber. For the motor-driven implement to have an improved carburettor pre-heating which enables easier operation, it is proposed that the warm air opening is disposed in the area of the intermediate wall which is disposed adjacently to the upper part of the cylinder.

Abstract: A work implement in the nature of a drive for a tool includes a starting and/or switching-off braking device for the tool. A brake button is provided which can be externally actuated by a user, with which a starting and/or switching-off brake can be released. A device is also provided which can change the rotational speed of the drive, the device having a throttle button capable of being actuated by the user from outside. The brake button and the throttle button are arranged on a handle so that they can be contacted simultaneously by the hand of a user, where the throttle button can be actuated when the starting and/or switching-off brake is applied.

Abstract: In order to create an engine more preferably for a small working machine, for example for garden, forest and landscape work or for an engine-operated tool and the like, with a carburettor unit for mixture provision, which carburettor unit via an inlet pipe is connected with a cylinder of the engine, wherein the cylinder extends along its piston running direction from its crankcase side as far as to its head end, and wherein a holding device is provided which serves for the mechanical holding of at least the carburettor unit and at least comprises an elastic element with an improved arrangement of the carburettor unit and easy removeability of the carburettor, i.e.

Abstract: In order to make available a clutch drum, which is connected to a toothed wheel, in particular a toothed wheel designed as a chain wheel for a motor saw, wherein a non-detachable connection of the toothed wheel and clutch drum is associated with a positive connection, and wherein the connection of the clutch drum and toothed wheel is a low cost, durable and reliable connection, it is proposed that the clutch drum is provided with a recess, wherein a rigid connection is provided between the toothed wheel and the clutch drum, which is welded from inside the clutch drum.

Abstract: A work implement in the nature of a drive for a tool includes a starting and/or switching-off braking device for the tool. A brake button is provided which can be externally actuated by a user, with which a starting and/or switching-off brake can be released. A device is also provided which can change the rotational speed of the drive, the device having a throttle button capable of being actuated by the user from outside. The brake button and the throttle button are arranged on a handle so that they can be contacted simultaneously by the hand of a user, where the throttle button can be actuated when the starting and/or switching-off brake is applied.

Abstract: In order to provide a carburettor unit for an internal combustion engine, which can be used in particular for motor-driven small apparatus, including a throttle unit contained in a housing which has a throttle valve which executes a rotary movement for controlling the power of the internal combustion engine, wherein the rotary movement can be initiated by means of a control cable via a throttle valve shaft and wherein the control cable includes a control cable casing and a pull cord according to the design of a Bowden cable, which has a simple receptacle of a control cable and requires a small space for connection to the carburettor unit, it is proposed that to initiate the rotary movement in the throttle valve shaft there is provided a lever element which is disposed on the throttle valve shaft and which can be actuated by means of the pull cord and wherein a retaining device is further provided for receiving the control cable casing, which is also arranged on the throttle valve shaft.

Abstract: The invention entails a handle for a pull-rope starter of a drive motor, especially of a chain saw. The invention includes at least one handle section, at least one fastening section for a starter rope, and a damping for smoothing out force peaks produced in the handle during the starting of the drive motor. The damping is arranged in the handle section.

Abstract: In order to make available a clutch drum, which is connected to a toothed wheel, in particular a toothed wheel designed as a chain wheel for a motor saw, wherein a non-detachable connection of the toothed wheel and clutch drum is associated with a positive connection, and wherein the connection of the clutch drum and toothed wheel is a low cost, durable and reliable connection, it is proposed that the clutch drum is provided with a recess, wherein a rigid connection is provided between the toothed wheel and the clutch drum, which is welded from inside the clutch drum.

Abstract: In order to improve a limiter cap (300; 300?) for limiting the adjustability of at least two set screws or valves (200), which are arranged side by side, with each set screw or valve (200) including at least one retaining nose or stop leg (240), extending in the transition area between the screw head (210) and the screw needle or valve needle (220) in a ring shape around the external circumference of the screw needle or valve needle (220), in particular for limiting the adjustment of the fuel flow through a carburetor (400; 400?), in such a way that inadvertently pushing the limiter cap onto the screw needle thus prematurely blocking said screw needle, already at the time when the (basic) carburetor adjustment takes place, is safely prevented, it is proposed that the limiting cap (300; 300?) is attached to each of the set screws (200) in particular in a way so as to be self-attaching, and/or in particular such that the limiter caps (300; 300?) engage each other with locking action, and/or without any further

Abstract: In order to improve a limiter cap (300; 300?) for limiting the adjustability of at least two set screws or valves (200), which are arranged side by side, with each set screw or valve (200) comprising at least one retaining nose or stop leg (240), extending in the transition area between the screw head (210) and the screw needle or valve needle (220) in a ring shape around the external circumference of the screw needle or valve needle (220), in particular for limiting the adjustment of the fuel flow through a carburetor (400; 400?), in such a way that inadvertently pushing the limiter cap onto the screw needle thus prematurely blocking said screw needle, already at the time when the (basic) carburetor adjustment takes place, is safely prevented, it is proposed that the limiting cap (300; 300?) is attached to each of the set screws (200) in particular in a way so as to be self-attaching, and/or in particular such that the limiter caps (300; 300?) engage each other with locking action, and/or without any further

Abstract: The invention entails a handle for a pull-rope starter of a drive motor, especially of a chain saw. The invention includes at least one handle section, at least one fastening section for a starter rope, and a damping for smoothing out force peaks produced in the handle during the starting of the drive motor. The damping is arranged in the handle section.

Abstract: A tank cap has an upper longish handle portion engageable by a user's hand to open and close the cap relative to the tank. The handle also has, on each of its two sides, an indentation into which a screwdriver or the like can be inserted to aid in rotating the cap in the opening direction, the indentation being shaped so that if the inserted screwdriver is moved in the direction corresponding to closing of the cap the screwdriver will be cammed out of the indentation without over-tightening the cap in the closing direction.

Abstract: For an internal combustion engine carburetor (10) having a throttle valve (14) and a choke (22), the throttle valve (14) and the choke (22) can be brought in dependence on each other to different sets of predetermined operating positions which are appropriate respectively for the operating of the engine at no-load, for a cold start, and for a warm start, with a safe and definite adjustment being achieved in that the switch (19) is placed directly on the carburetor (10) and is connected with the choke (22) and in that the choke (22) and the throttle valve (14) are coupled with each other over mechanical couplings (16, . . . 21) with the switch (19) having a different position for each set of throttle valve and choke operating positions.

Abstract: The invention relates to a case seal (6) for cross-divided crank cases, comprising an upper section (1) and a lower shell (2) (see figure). Both halves of the crank case have bearing seats (3, 4) for bearing (5) a shaft. The inventive case seal (6) is characterized in that it is configured as a single-piece elastic shaped part which can be placed on one half of a crank case along the sealing surfaces (7, 8) and the bearing seats (3, 4). Preferably, the case seal also consists of a second elastic shaped part (11) which can be inserted into the bearing seat (3) of the second half (1) of the crank case that is not provided with the first sealing part (6).

Abstract: A tank cap has an upper longish handle portion engageable by a user's hand to open and close the cap relative to the tank. The handle also has, on each of its two sides, an indentation into which a screwdriver or the like can be inserted to aid in rotating the cap in the opening direction, the indentation being shaped so that if the inserted screwdriver is moved in the direction corresponding to closing of the cap the screwdriver will be cammed out of the indentation without over-tightening the cap in the closing direction.

Abstract: For a system for actuating a carburetor (10) of an internal combustion engine, the carburetor (10) comprising a throttle valve (14) and a choke (22), actuating system for which a switch (19) is provided for with which the throttle valve (14) and the choke (22) can be brought in dependence on each other to different predetermined operating positions which are characteristic of the operating of the engine at no-load, for a cold start and a warm start, a safe and definite adjustment is achieved in that the switch (19) is placed directly on the carburetor (10) and is connected with the choke (22) and that the choke (22) and the throttle valve (14) are coupled with each other over mechanical coupling means (16, . . . 21) so that the switch (19) takes another position in each operating position.

Abstract: To improve a carburetor including a main housing portion (12), in which a Venturi tube (2) and a throttling part (2a) are defined and which has an air intake side and an engine exit side, and a fuel pump (5) to the effect that, on the other hand a better starting procedure is provided and, on the other hand, the carburetor and, consequently, the engine are reliably prevented from getting flooded, it is suggested to supply fuel to the fuel pump (5) via a fuel intake (8) which is connected to the fuel tank (63) through a fuel line (64), and a fuel vapor supply (or vent) line (60) is provided which with its one end (61) is connected to the fuel intake feed channel (28) and with its other end (62) is connected to the fuel tank (63), and that in the route of the fuel vapor supply line (60) a check valve (66) is provided.