Abstract: A portable motor chain saw comprises a machine body (1) which a driving unit, a rear handle (2), a front handle which extends over the machine body, a guide bar (6), and a dog device (15) provided such that it can be pressed against the object to be worked by means of the machine, said dog device forming a center of rotation for turning the guide bar in the plane of the guide bar. The characterising features are that the dog member (15) is provided in front of the front handle (3), approximately on a level with that part (4) of the front handle which extends over the machine body, and is connected to the front handle, and that at least that part of the dog device which is provided to engage the object to be worked, consists of a polymeric material. Preferably, the height of the dog device over the guide bar corresponds to two to three times the vertical width of the guide bar.

Abstract: The invention concerns a motor powered saw with a saw chain (2) and a guide bar (1), the rear portion of which is covered by a side cover (3) and during operation clamped with a certain clamping force between the side cover and a counter support on that side of the guide bar which is turned towards the motor, tensioning elements being provided for tensioning the saw chain by displacing the guide bar forwards, when the guide bar has been loosened by easing the clamping force, and elements for securing the guide bar in a new position.

Abstract: The invention relates to a gasoline motor powered, hand-operated working machine, which is stopped by short-circuiting an electric circuit (70), said stop device being designed in the form of an electric switch comprising a stop control (11), which can be moved manually between two end positions; a drive position for start of the motor and for motion of the motor, in which drive position said circuit is not short-circuited, and a fixed stop position in which the circuit is short-circuited and the stop control is locked.

Abstract: The invention relates to a device on a handheld cutting or sawing machine with a rotatable cutting or sawing blade; a driving machinery for rotating the blade; means for supplying cooling or flushing water on the blade and/or a workpiece; a rear handle with controls for the driving machinery; a front handle bow with a front part (5) which is the normal gripping part of the handle bow; a right hand side part (6) and a left hand side part; and a water valve (8) for control of the flow of cooling or flushing water, said valve comprising a valve housing (27) with a valve house chamber (33); a valve body (36) which is turnable about an axis of rotation (23) by means of a lever (22); an inlet nipple (15) for the connection of a water hose (16) for incoming water to the valve; and an outlet nipple (17) for the connection of a water hose (10) for outgoing water from the valve; and securing means (35, 43) for mounting the water valve on the handle blow.

Abstract: The invention relates to a portable, hand-operated working machine (1) with a tool which is rotatable by an engine through a driving shaft (20), and a transmission comprising a centrifugal coupling, a driving belt (8) and a driving wheel with a groove (7) for the driving belt fitting in said groove, which driving wheel comprises an outer (3) and an inner (4, 4′) half of the driving wheel, wherein the outer half (3) of the driving wheel consists of an inner wall of a coupling drum (11) being part of the centrifugal coupling, which drum is rotated by the driving shaft when the centrifugal coupling is in the operative state.

Abstract: A device in connection with a hand-operated working machine with a water flow directed to the working tool comprises a first control which is a control (15) for a drive motor (3) for the tool, and a second control which is a control (17) for the water supply to the tool. A water control valve (45) in a water supply conduit (14) can be adjusted to adopt chosen opening positions, and is arranged constantly to be kept open in any chosen opening position when the motor is running the tool under influence of the drive motor control. The chosen opening positions are adjustable, i.e. the through opening of the valve can be increased or decreased by using water supply control (17).

Abstract: A portable, combustion engine powered cutting or sawing machine comprises a rear part (1) with a motor housing (3) with a combustion engine (4), an engine block (5) with a crank house, and a front part (2) with an annular blade (30) and a blade holder (31). The blade is provided in/or adjacent to a center blade (37) of the machine. The engine block forms a central body in the machine, including portions of said body on both sides of said center plane, and the blade holder comprises a blade holder chassis (35), which is provided substantially on a first side of said center plane. The blade holder chassis is fixedly connected on one hand with the portion of the engine block, which is located on said first side of the center blade, and on the other hand with a portion which is located on a second, opposite side of the center plane.

Abstract: A device in connection with a cutting machine with an annular saw blade and with a driving mechanism for off-center drive of the blade. The device includes two first rollers arranged to contact and roll against the web of the saw blade on one side of the blade and two second rollers arranged to contact and roll against the web of the blade on the other, opposite side of the blade. The first rollers are mounted on a first shaft, which is movable along a path against the plane of the saw blade, perpendicularly to the centerline of the shaft, for pressing the first rollers with a certain desired force against the blade web under counter force by the second rollers on the opposite side of the blade.

Abstract: A hand-operated cutting machine comprising a rotatable saw blade (3), a machine body with drive machinery for rotation of the saw blade, a rear manoeuvring handle (20) with control (17, 18) for a drive motor (2) included in said drive machinery and a front handle bow (25) which has the form of a crow which stretches from one side of the machine body over the machine body or over the saw blade to the other side of the machine body. The handle bow is rotatably attached to the machine body in a hinge (26) with an axis of rotation (24) which is located behind the saw blade and is perpendicular to the plane of the saw blade, that both ends of the handle bow are connected to each other through said hinge, and that the handle bow is fixingly adjustable in different rotational positions.

Abstract: The invention relates to an apparatus in an engine-driven machine having a tool carrier for a rotary tool and having a splinter shield cover (20) for the tool, which cover houses a section of the tool and has a through-running fixture hole (27) for the cover in a bearing side wall.

Abstract: The invention relates to a splinter shield comprising a protective cover (20) for a substantially plane, circular tool, e.g. a cutting wheel (6), circular-saw blade or the like, which is rotatable about a rotation axis (31) and which, together with the splinter shield, can be fitted on a tool carrier (5) on a manually operated machine (1), which protective cover (20) is intended to house a section of the tool and has a through-running fixture hole (27) for the splinter shield on the side facing the tool carrier. What distinguishes the invention is that the side of the protective cover which contains the fixture hole is double-walled around the fixture hole, the walls (30, 60) in a region around the fixture hole being arranged at a distance (H) apart.

Abstract: A starter device for an internal combustion engine comprises a unit (1) which is fixed relative to the engine, a movable unit (2) which is rotatable relative to the fixed unit about an axis of rotation (28), included in the movable unit (2) on the one hand a cord drum (42) with a starter cord (47) and on the other hand a driver device (58) for direct or indirect rotation of the engine shaft on rotation of the cord drum by pulling the starter cord, a return spring chamber (4) accommodating a return spring (3) arranged to be tensioned when the movable unit is rotated by pulling the starter cord and subsequently, by resilience, to return the cord drum to its initial position, and also at least one bearing between said fixed and movable units (2, 1).