Patent ID: 8875850

Claim:
A disc brake assembly comprising: (a) a housing defining an annular fluid pressure cavity including an inlet adapted for connection to a source of pressurized fluid; (b) an annular piston having portions thereof sealingly disposed in the fluid pressure cavity; (c) an annular positioning plate secured to the housing and having a plurality of poppets each having a friction surface thereon disposed thereabout and individually movable in an axial direction with respect to the plate; (d) a plurality of springs disposed about the piston and operable to bias the poppets in a direction axially away from the piston; (e) at least one rotor having an annular friction surface disposed on an input shaft for rotation therewith and movable thereon in an axial direction; and, (f) an annular mounting plate with an annular friction surface connected to the piston wherein, upon fluid pressurization of the pressure cavity, the housing and positioning plate are moved axially away from the rotor, friction pads and mounting plate, and, upon depressurization of the pressure cavity, the springs are operable to move the friction pads into contact with the at least one rotor annular friction surface for effecting braking action.