Abstract: The present invention relates to a brake disc (1) comprising a bell (2) having a bell base (3) and a tubular wall (4) protruding axially (A-A) from said bell base (3), said brake disc (1) further comprising a braking band (5) having a band opening (6), wherein the tubular wall (4) of said bell (2) comprises a cup toothing system (7) extending along an outer circumference of said tubular wall (4) and having cup teeth (8) protruding outwards in a radial direction (R-R), said cup teeth (8) are circumferentially (C-C) spaced out by empty cup gaps (9), wherein each empty cup gap (9) is in the circumferential direction (C-C) between adjacent cup teeth (8), the braking band (5) comprises a ring toothing system (10) having an annular ring body (11) from which ring teeth (12) radially inwardly protruding at the band opening (6) extend, wherein said ring teeth (12) are circumferentially (C-C) spaced out by ring tooth gaps (13), wherein each ring tooth gap (13) is in the circumferential direction (C-C) between ring teet

Abstract: A ventilated braking band for brake disc having a first plate and a second plate; the first plate has at least a first inner surface, and the second plate has a second inner surface. The first inner surface defines a first inner surface plane or level (z1-z1) coinciding with said first inner surface, and the said second inner surface defines a second inner surface plane or level (z2-z2) coinciding with the second inner surface. The ventilated braking band has connecting elements which extend in an axial direction between the first inner surface and the second inner surface. The ventilated braking band has at least one bulge. The at least one bulge is partially interpenetrated with: at least one portion of the first foot, thus forming a structural continuity with the first foot, thus avoiding the first inner surface level from being reached; or at least one portion of a second foot, thus forming a structural continuity with the second foot, thus avoiding the second inner surface level from being reached.

Abstract: A ventilated braking band for ventilated brake disc, unusually capable of an efficient cooling and structural resistance, has a first plate and a second plate. The ventilated braking band has protrusions which project from a plate without reaching the other plate. Some of the protrusions which project from one of the first or second plate form a protrusion group. The protrusion group forms a continuous or interrupted protrusion group path. The protrusion group projects from both plates, thus forming at least a first and a second protrusion group path. The projections of the first and second protrusion group path cross one another on a plane parallel to the first or second braking surface of the respective plates.

Abstract: A brake band (2) is in a first material suitable for the braking action and has at least one extension (8) for coupling to a bell (3), suitable for coupling the disc (1) to a hub of a vehicle; said coupling extension being a single piece with said brake band and forming a geometric coupling with said bell to transmit the braking action; said geometric coupling being obtained by fusion preferably of the bell on the brake band, said bell being in a second material, the first and second material having a different melting point; said geometric coupling having, circumferentially spaced, first teeth, that axially extend to be tightly received in first axial seats (11) of the bell; wherein said geometric coupling has circumferentially spaced eighth teeth of the band that radially extend circumferentially offset with respect to said first axial teeth (10) and are suitable for being tightly received in eighth radial seats (13) present in the bell.

Abstract: A brake band (2) is in a first material suitable for the braking action and has at least one extension (8) for coupling to a bell (3), suitable for coupling the disc (1) to a hub of a vehicle; said coupling extension being a single piece with said brake band and forming a geometric coupling with said bell to transmit the braking action; said geometric coupling being obtained by fusion preferably of the bell on the brake band, said bell being in a second material, the first and second material having a different melting point; said geometric coupling having, circumferentially spaced, first teeth, that axially extend to be tightly received in first axial seats (11) of the bell; wherein said geometric coupling has circumferentially spaced eighth teeth of the band that radially extend circumferentially offset with respect to said first axial teeth (10) and are suitable for being tightly received in eighth radial seats (13) present in the bell.

Abstract: A brake disc of a rotation axis, comprising a support carrier, a braking band comprising two flanges connected by a plurality of connection elements which define ventilation channels for the braking band, at least one drive element able to connect the support carrier and the braking band to each other. The connection elements have a variable resistant section in an axial direction parallel to the rotation axis, the resistant section being measured in an area substantially parallel to the direction of the air flow inside the ventilation channels. Such resistant section progressively increasing as it moves from a median resistant section towards the respective connection resistant sections of the connection element to the flanges.

Abstract: The invention relates to a brake disc (1) comprising a support cap (2), which is intended to be connected to a wheel hub of a vehicle, and a braking band (3), which is intended to cooperate with a caliper of the disc brake. The braking band comprises two plates (31, 32) which are connected by a plurality of connecting members (33) that define ventilation ducts (34). The brake disc is characterized in that, a plurality of the connecting members having different shapes and/or dimensions are arranged according to a module (M) which repeats itself an integral number of times along the braking band.

Abstract: A brake disc of a rotation axis, comprising a support carrier, a braking band comprising two flanges connected by a plurality of connection elements which define ventilation channels for the braking band, at least one drive element able to connect the support carrier and the braking band to each other. The connection elements have a variable resistant section in an axial direction parallel to the rotation axis, the resistant section being measured in an area substantially parallel to the direction of the air flow inside the ventilation channels. Such resistant section progressively increasing as it moves from a median resistant section towards the respective connection resistant sections of the connection element to the flanges.

Abstract: The invention relates to a brake disc (1) comprising a support cap (2), which is intended to be connected to a wheel hub of a vehicle, and a braking band (3), which is intended to cooperate with a caliper of the disc brake. The braking band comprises two plates (31, 32) which are connected by a plurality of connecting members (33) that define ventilation ducts (34). The brake disc is characterized in that, a plurality of the connecting members having different shapes and/or dimensions are arranged according to a module (M) which repeats itself an integral number of times along the braking band.

Abstract: A device for protecting an electrical system against surge voltages, comprising one or more protection components (10), means (20) for disconnecting the protection component (10) and means (30) for visually indicating the state of the component (10), operationally connected to the disconnection means (20) and comprising at least one control part (40) and at least one means (50) for indicating the state of the protection component (10), combined with the control part (40), whereby the relative arrangement of the control part (40) and the disconnection means (20) is such that, when the disconnection means are opened (20), the disconnection means release the control part (40), thereby allowing the control part to move.