Patent ID: 8448753
Filing Date: 2013-05-28
Classification: F16D

Abstract:
1. A disc brake caliper which is provided with a disc integral with a hub of a wheel, the disc rotatable about a central rotation axis, the caliper comprising: a hub-side supporting element and a wheel-side supporting element, which are counterpoised on opposite sides of the disc; at least one connection bridge which straddles the disc and forms a single part with the supporting elements for rigidly connecting the two supporting elements together; a plurality of pistons, each of which is arranged in a corresponding supporting element and presses a corresponding pad against a side surface of the disc; and a cooling circuit, which makes a flow of cooling air circulate through said supporting elements and comprises a plurality of cooling pipes, which are obtained through the supporting elements and are arranged by the side of the pistons, wherein each cooling pipe is rectilinear and extends from an inlet mouth obtained in an external wall of the corresponding supporting element opposite to the disc to an outlet mouth obtained in an internal wall inside the corresponding supporting element facing the disc, wherein the cooling circuit comprises: an air vent arranged at said hub-side supporting element; a hub-side diffuser which covers the external wall of hub-side supporting element and receives the cooling air from the air vent; a wheel-side diffuser which covers the external wall of wheel-side supporting element and receives the cooling air from the air vent; and at least one connection pipe for connecting the wheel-side diffuser to the air vent; wherein each supporting element accommodates three pistons and presents eight cooling pipes, which are uniformly distributed about the three pistons so that each cooling pipe is independent and separate from the other cooling pipes; wherein each supporting element presents two elongated cross-section side cooling pipes arranged externally and by the side of said pistons and six central cooling pipes arranged in threes between the central piston and the side pistons; wherein each supporting element presents, between the central piston and each side piston, a circular cross-section central cooling pipe and two elongated cross-section central cooling pipes that are arranged on opposite sides of the circular cross-section central cooling pipe; and wherein at least one cooling pipe in each supporting element is shaped to converge towards an end of at least one corresponding piston.