Multi-layer disk brake rotor

A disk used in a disk brake system formed of a plurality of metal plates stacked and brazed together to form a unitary disk, said disk including a solid metal plate having a center hole on each end and first and second groups of internal metal plates each having a center hole and multiple generally radial slots between said solid plates, said second group of internal metal plates having slots aligned with and narrower than said slots in said first group of internal metal plates, the plates of said first group forming fins stacked between plates of said second group the outside and inside diameters of said internal metal plates being cut away to open generally radial passages between said fins, said solid metal plate on one end of said stack having a smaller inside diameter than other plates in said stack thereby constituting a flange, and mounting holes in said flange.

A disk for a disk brake system comprising stacked generally annular metal plates brazed together to form a unitary disk, said plates including solid outside annular plates and inside plates having inside and outside rims said inside plates including first and second groups of said inside plates each having a plurality of generally radially directed slots between said rims with the plates of said first group defining fins and the plates of said second group having wider slots than the plates of said first group defining a plurality of fin spacers, said plates of said second group being stacked between and aligned with plates of said first group to produce a plurality of generally radial slots separated by said fins and fin spacers, said plates being trimmed to remove said rims and open said slots, a radially inwardly directed flange on an outside plate on one end of said stack, and mounting holes in said flange.