Patent ID: 8251190

Claim:
A brake disk, comprising: two mutually spaced plates connected to one another by ventilation studs distributed in concentric circular rows, including an outlet row of studs, through which air leaves the space between the plates, and an upstream row of studs, upstream of the outlet row in a direction of air flow, the studs of the upstream row being angularly offset from the studs of the outlet row, wherein the studs of the upstream row have an oblong shape, the perimeter of which is delimited by two rounded ends connected by two rectilinear portions, the rounded ends being continuously curved from a first one of the two rectilinear portions to a second one of the two rectilinear portions and having, transversely, distinct dimensions, such that the studs have a progressive widening in the direction of the airflow continuously from a first one of the rounded ends to a second one of the rounded ends to compress air entering through air inlet openings between the plates, and the studs of the outlet row have an oblong shape, the perimeter of which is delimited by two rounded ends connected by two rectilinear portions, the rounded ends being continuously curved from a first one of the two rectilinear portions to a second one of the two rectilinear portions and having, transversely, distinct dimensions, such that the studs have a progressive narrowing in the direction of airflow continuously from a first one of the rounded ends to a second one of the rounded ends to aspirate and then evacuate the compressed air from the space between the plates, and wherein each of the air inlet openings face one of the studs of the upstream row such that an axis of symmetry of each of the air inlet openings coincides with an axis of symmetry of one of the studs of the upstream row, and one of the studs of the upstream row is positioned between two of the studs of the upstream row facing two adjacent air inlet openings.