BRAKING BAND OF A DISC FOR DISC BRAKE OF VENTILATED TYPE

The present invention relates to a braking band (1) of a disc brake disc (2) of a ventilated type unusually capable of avoiding vibrations which induce annoying squeals during the braking action, said braking band (1) extending between an inner diameter (D1), near a rotation axis (X-X) of the braking band (1), and an outer diameter (D2), far from said rotation axis (X-X), said rotation axis defining an axial direction (X-X); said braking band (1) defining a radial direction (R-R) which is substantially orthogonal to said axial direction (X-X), and a circumferential direction (C-C) which is orthogonal both to said axial direction (X-X) and to said radial direction (R-R); said braking band (1) comprising two plates (3, 4) facing each other; said plates (3, 4) comprising inner surfaces (5, 6), either directly or indirectly facing and delimiting a gap (7); said plates (3, 4) being joined to each other by heat-dissipating and connecting elements (16, 17, 18, 19), also named connecting elements; - said connecting elements (16, 17, 18, 19) project from a plate towards the opposite plate, thereby forming bridges which connect the plates (3, 4) to each other; wherein at least one of said connecting elements is a fin (19) which is in a single piece and extends from near said inner diameter (D1) to near said outer diameter (D2); and wherein said fin (19) comprises a fin outer end portion (20) located near said outer diameter (D1); the fin outer end portion (20) of said fin (19) comprises a predetermined extension along the outer circumferential direction, i.e. an outer circumferential width (Lo); said fin (19) comprises a fin inner end portion (21) located near said inner diameter (D1); said fin inner end portion (21) of said fin (19) comprises a predetermined extension along the inner circumferential direction, i.e. an inner circumferential width (Li); wherein considering a section taken along a section plane comprising a radial (R-R) and circumferential (C-C) direction, section made by passing through a mean air flow point which runs through said gap, said outer circumferential width (Lo) is greater than said inner circumferential width (Li). La présente invention concerne une bande de freinage (1) d'un disque pour frein à disque (2) d'un type ventilé, qui contrairement à l'habitude, permet d'éviter des vibrations induisant des grincements ennuyeux pendant l'action de freinage. Ladite bande de freinage (1) s'étend entre un diamètre interne (DI), proche d'un axe de