An axial bearing includes a first piston and a second piston. Axial contact surfaces between the pistons are arranged in the same pressure space. The same pressure fluid fed to the axial bearing acts on the contact surfaces and on working pressure surfaces of the pistons. A rock drilling machine is also provided with such an axial bearing.

A frame 1, removable, is assembled in front of a container 2 and a frame 3, it also removable, is assembled behind the above-mentioned container 2. The frame 1 keep a inflable fairing 4 and the frame (3) keep a inflable fairing 5.

A water treatment apparatus in which the various components that constitute the apparatus (prefilters (2,3), osmotic membrane filters (6,7,8), pump, et cetera) are contained in an enclosure. The enclosure includes a body provided with compartments that accommodate the components of the apparatus and at least one cap (12,13,14,15) provided internally with channels for conveying the water in output ...

A boiler (10) for steam production. The boiler (10) is composed of a lower body (11) and an upper body (12). The lower body (11) has a first border (14) on which the second border (18) of the upper body (12) is placed, with the second border (18) having a higher width than the first border (14) in such a way as to be completely folded over the first border (14) and plastically deformed to obtain h...

A boiler (10) for steam production. The boiler (10) is composed of a lower body (11) made of metal material and an upper body (12) made of plastic material. The two bodies (11, 12) are hermetically coupled by means of a joint (21) moulded on two flanges (14, 18) projecting outwards from the lower (11) and the upper (12) body, respectively.

A wheel, particularly for tracked vehicles, comprising at least one flange (4) adapted to connect concentrically the hub (2) to the rim (3) and affected by a distribution of substantially radial ripples (11).

The joint comprises two spiders 18 and a central core 16 forming a housing 24 for the sliding movement - in a transverse plane - of a basically discoidal constraint member 20 forming the seats 20A for the spherical end heads 10C, 14C of the two forks. The constraint member 20 moves about inside said housing 24. Between each of said two surfaces 24A, 24B and the opposing face of said constraint mem...

The joint comprises two spiders (10, 14) and a central core forming a cavity for sliding movement in a transverse plane for two constraint members (120) with seats (120A) for the spherical heads (10B; 14B) on the ends of the two forks (10, 14); a divider (150) divides said cavity into two housings (124) for the two constraint members (120).