Patent ID: 7380643

Claim:
A brake assembly, particular for a hydraulic wheel drive, comprising a disk package formed of a plurality of outer disks and corresponding inner disks, which is hydraulic cycle acts on a piston assembly for driving braking and first hydraulic cycle acts on the piston assembly for parking braking, wherein said piston assembly comprises a driving brake piston which is in contact with said disk package and is able to be pressurized by said first hydraulic cycle and also able to be pressurized by means of an adjacent parking brake piston interacting with a second hydraulic cycle; wherein said parking brake piston has an annular configuration and is arranged coaxially with the driving brake piston also having an annular configuration; said parking brake piston is arranged on the outer circumference of said driving brake piston and contacts an outer radial shoulder of said driving brake piston in the axial direction of said disk package in order to transfer the braking force to the driving brake piston; and said shoulder also forms the effective surface of said driving brake piston able to be pressurized with the brake pressure via a radial bore in the parking brake piston.