AMENDED CLAIMS

received by the International Bureau on 19.Oct.2018 (19.10.2018

[Claim 1] - System for assembling removable elements, comprising a first locking device (1), a second locking device (2), a third locking device (3) and a cube-shaped angular connector (4, 5); said first locking device (1) having a hollow or solid central locking element (1.1) extending along the longitudinal axis thereof; said second locking device (2) having an externally cylindrical hollow central locking element (2.1) extending along the longitudinal axis thereof; said central locking element (2.1) of the second locking device (2) housing - therein - the central locking element (1.1) of the first locking device (1) and having an inner section equivalent to the outer section of the central locking element (1.1) of the first locking device (1); said central locking element (1.1) of the first locking device (1) has at least one first guide (1.4) having a longitudinal axis parallel to that of the central locking element (1.1); an end of the first guide (1.4) starts from the free end of the central locking element (1.1); the central locking element (1.1) of the first locking device (1) further comprising at least one second guide (1.5) having a longitudinal axis orthogonal to that of the central locking element (1.1), extending for at least 90°; the second end of each longitudinal guide

(1.4) is in communication with an end of each second orthogonal guide

(1.5) and each pair of guides (1.4, 1.5), arranged to form an L shape, delimits a fin (1.6); said third locking device (3) consists in a hollow sleeve (3.1) and houses the central locking element (2.1) of the second locking device (2) therein and rotates about itself; externally, the hollow sleeve (3.1) has faces for facilitating the manual rotation thereof;

said system being characterised in that:

- an end of the central locking element (1.1) of said first locking device (1) is fixed on a face of a support (1.2); on an opposite face of the support (1.2) of the first locking device (1) is fixed a gripping element (1.3) connectable to a first removable element or a gripping element (1.7) capable of connecting the first locking device (1) to the angular connector (4, 5);

- an end of said hollow central locking element (2.1) of the second locking device (2) is fixed on a face of a support (2.2); on an opposite face of the support (2.2) of the second locking device (2) is fixed a gripping element (2.3) connectable to a second removable element or a 17

gripping element (2.6) capable of connecting the second locking device (2) to the angular connector (4, 5); said hollow central locking element (2.1) of the second locking device (2) having - on the wall - at least one guide (2.4) extending for at least 90°; each guide (2.4) has a longitudinal axis orthogonal to that of the central locking element (2.1); the second locking device has at least one guide element (2.5);

- said third locking device (3) is formed by at least two parts and it is provided with at least one pin (3.2) projecting towards the internal.

[Claim 2] - System for assembling removable elements, according to claim 1, characterised in that each of said gripping elements (1.3,) of the first locking device (1) and gripping elements (2.3) of the second locking device (2) connectable - by pressure or coupling fashion - to a removable element consists in a body insertable into the inner cavity of the removable element.

[Claim 3] - System for assembling removable elements, according to claim 1, characterised in that at least one guide element (2.5) of the second locking device (2) is male- shaped and it is fixed on the inner wall of the central locking element (2.1); each guide element (2.5) is ac- commodable in the end of the first longitudinal guide (1.4) of the central locking element (1.1) of the first locking device (1).

[Claim 4] - System for assembling removable elements, according to claim 1, characterised in that at least one guide element (2.7, 2.8) is present on the support of the second locking device (2) inside the central locking element (2.1).

[Claim 5] - System for assembling removable elements, according to claim 4, characterised in that said guide element (2.7) is male-shaped and it is capable to be housed in the end of a first longitudinal guide (1.4) of the central locking element (1.1) of the first locking device (1) or in at least one cavity having an equivalent shape obtained in the free end of such central locking element (1.1).

[Claim 6] - System for assembling removable elements, according to claim 4, characterised in that said guide element (2.8) is female-shaped; each female-shaped guide element (2.8) is capable to house an equivalently- shaped male- shaped projection obtained in the free end of the central locking element (1.1) of the first locking device (1).

[Claim 7] - System for assembling removable elements, according to claim 1, characterised in that the central locking element (1.1) of the first locking device (1) has - in the outer wall - at least one projecting edge 18

(1.9) constituting a guide element with longitudinal axis parallel to that of the central locking element (1.1) of the first locking device (1); said edge (1.9) is capable to be housed in a groove obtained in the inner wall of the central locking element (2.1) of the second locking device (2).

[Claim 8] - System for assembling removable elements, according to any one of claims 1, 3, 4, 5 and 6, characterised in that each guide element (2.5, 2.7, 2.8) of the second locking device (2) has two sides arranged according to axes parallel to those of the central locking element (2.1) on which the two parallel opposite sides of each guide of the first locking device (1) slide, guaranteeing the axial alignment between the two locking devices (1, 2) and thus avoiding the rotation thereof.

[Claim 9] - System for assembling removable elements, according to claim 1, characterised in that the at least one gripping element (1.7, 2.6) fixed to said support (1.2, 2.2) of the first and of the second locking device (1, 2) is female or male-shaped or threaded and it is capable of connecting the locking device (1, 2) to a male-shaped (5.4) or female-shaped (4.1, 5.3) or threaded gripping element of the angular connector (4, 5); said angular connector (4, 5) is cube-shaped and it enables obtaining a 90° connection between at least two removable elements.

[Claim 10] - System for assembling removable elements, according to claims 1 and

9, characterised in that it uses a cube-shaped angular connector (5) to enable the connection between at least two removable elements even with angles different from 90°; said angular connector (5) comprises a cylindrical element (5.2) rotating therein; said cylindrical element (5.2) having male-shaped (5.4) or female-shaped (5.3) or threaded gripping elements which are assembled to the female-shaped or male-shaped or threaded gripping elements (1.7, 2.6) fixed to the support (1.2, 2.2) of each first and second locking device (1, 2).