Patent ID: 6851526

Claim:
An actuator, comprising: a support member having a flange projecting radially therefrom; an annular piston is slidably and sealingly mounted on the support member; a disk spring mounted on the support member, the flange being located between the piston and the disk spring, a plurality of fingers projecting outwardly from an outer edge of the disk spring; a hollow brake-engaging member surrounding the flange, the piston and the disk spring, a first end of the brake-engaging member being coupled to the piston, a second end of the brake-engaging member being coupled to the disk spring and being adapted to engage a wheel brake, the flange, support member, piston and brake-engaging member enclosing a piston chamber, the disk spring being biased to urge the second end of the brake-engaging member away from the flange, and fluid pressure in the piston chamber urging said second end towards the flange, the second end of the brake-engaging member forming a plurality of peripherally spaced apart tabs; and a snap ring held by the tabs, the snap ring engaging the fingers and retaining the disk spring in the actuator.