SUMARY Comprises first and second pieces (10, 20) which have end configurations (11, 21) for installation and guide and respective coupling configurations (14, 24) plug-in fit at the ends of a third, tubular piece (30) which defines an intermediate, cylindrical section (31), for attachment of liners (40). The hydraulic device comprises two expansible sleeves (50) situated on the first and second pieces (10, 20) each with a circular cavity (51) connected to a longitudinal duct through the shaft containing a fluid capable of being subjected to pressure to make convex an external, deformable wall (52) of the sleeve. The longitudinal duct comprises first and second sections (12, 22) in the first and second pieces (10, 20) connected, by means of a flexible tube (60) located in the hollow interior of the third piece (30).

The device has a base plate (2) with socket for holding a side wall (4) and fixing means for rollers (5, 6) mounted on assembly plates (20). The socket has a further preferably iron plate (3) which is mounted fixed with the assembly plate on the base plate. The iron plate, assembly plate and base plate can have corresponding holes and grooves for screw fixing.

The device has mounting plates (6) each of which comprises fasteners that cooperate with maintenance elements of a rear side (10) of a drain board (5) of a roof eave trim (4). The plates have a dissymmetric contour. The fasteners are mounted in rotation with respect to the maintenance elements, between a release position and a locking position. The plates are released from the drain board, in the release position. The mounting plates are integrated with the drain board in a direction perpendicular to a longitudinal axis of the drain board, in the locking position.

The invention relates to a method for straightening a metal strip (1) which is guided in the direction of transportation (R) through a straightening machine (2) and is straightened. In the straightening device (2), the metal strip (1) is impinged upon by a straightening force (F) which is applied by a plurality of straightening rollers (3) in the direction (N) which is perpendicular to the surface of the metal strip (1). According to the invention, prior to the metal strip (1) entering into the straightening machine (2), the thickness (d) of the metal strip (1) is determined and the position (a) of the straightening rollers (3) in the direction (N) which is perpendicular to the surface of the metal strip (1) is taken into account according to the determined thickness (d).

The assembly has a housing defining a handle (4) and accommodating a motor for actuating the output member of a power tool e.g. drill bit or jigsaw blade. A flexible sheet (8) is mounted to the surface of the handle and has a series of protrusions (10) to be engaged by the hand of a user. The protrusions retain a gaseous vibration damping material e.g. air between flexible sheet and surface of handle.

The device (4) has a spiral brush (40) that is carried by a drive shaft (41) for being rotated around a horizontal axis. The device slides against an emptying device (3) for being rotated around a vertical axis. The brush due to its rotation intercepts and ejects a residual product volume towards a central bunker (102).