Abstract: A wave absorber element (100) of the front pivot type for the absorption of wave energy from a body of water has a front end (101) comprising a front pivot axis (1) around which the absorber element (100) swings under operation, and an absorber element body (103) being substantially defined by a front side (4) extending from the front end (101) to a lower rear edge (2), a rear side (5) extending from an upper rear edge (3) to the lower rear edge (2), a top side (6) extending from the front end (101) to the upper rear edge (3), and lateral sidewalls (7, 8) defining the width Fw of the absorber body (103) in an axial direction parallel to the front pivot axis (1). The lower rear edge (2) is located in a first radial direction (11) at a first distance from the pivot axis (1), the upper rear edge (3) is located in a second radial direction (12) at a second distance from the pivot axis (1), and the first and second radial directions (11, 12) define an acute tip angle (alpha) of the absorber element (100).

Abstract: A portable, hand-held, combustion engine powered working machine comprises a tool unit (1) including a rotatable working tool (3), and a machine unit (2) including an internal combustion engine (11), an assembly (16) for supplying air and fuel to the engine, and an air cleaning system, which comprises a filter assembly (10) including at least two filters (84, 85), referred to as pre-filter (84) and main filter (85), for cleaning the air that shall be supplied to the engine.

Abstract: A portable, hand-held, combustion engine powered working machine comprises a tool unit (1) including a rotatable working tool (3), and a machine unit (2) including an internal combustion engine (11), an assembly (16) for supplying air and fuel to the engine, and an air cleaning system, which comprises a filter assembly (10) including at least two filters (84, 85), referred to as pre-filter (84) and main filter (85), for cleaning the air that shall be supplied to the engine.

Abstract: A portable working machine comprising a tool unit (1) with a disc guard and a circular, disc-shaped tool (3), which can be rotated about an axis of rotation (4), which is horizontal in the normal upraised position of the machine, and a machine unit (2), which includes at least a filter system (10), which is at least partly accommodated in a top part of the machine unit, an internal combustion engine (11) with an engine cylinder (13) with bore (12) having a centre line (30), a crankshaft (14) and a crankcase (15), as assembly (16) comprising members for supplying air and fuel to the engine, a fuel tank (17), a muffler (18) with an entrance port (46) provided in the rear side (42) of the muffler and facing an exhaust port (47) of the cylinder (13), i.e.