Disk brake assembly for vehicle wheels

A brake assembly for a motor vehicle wheel having a flanged wheel hub comprising circumferentially spaced projections which extend radially outwardly therefrom, said brake assembly comprising

• a brake housing comprising a pair of annular members spaced axially from each other to provide an annular channel-like gap open on its radially exterior side and partially closed on its radially inner side by circumferentially spaced wall segments with open spaces therebetween, said housing having flanges attached to said wall segments which extend radially inwardly from the wall segments for attaching the housing to said projections of the hub flange to be rotatable jointly with the wheel, said projections being circumferentially spaced to provide openings therebetween aligned with the said open spaces,
• at least one pair of segmental brake disks disposed from the radially exterior side into the channel-like gap and fully lining the brake housing, means disposed between the brake disks for actuating the brake disks with a fluid under pressure, and means for non-rotatably supporting the brake disks and actuating means in the channel-like gap comprising a wheel carrier fixed against rotation with the hub and having arms which are disposed axially over the channel-like gap,
• the means for actuating the brake disks comprising a two-stepped ring piston having circumferentially-spaced projections at each end thereof which contact the brake disks, and openings between said projections on the piston for flow of air into the brake housing.