Patent ID: 6715589
Filing Date: 2004-04-06
Classification: F16D

Abstract:
A self-servoing disc brake assembly comprising:a driven rotor member including a first inner face with a plurality of first pockets, and a first friction surface spaced from said first inner surface; a movable rotor member supported on said driven rotor member and movable relative to said driven rotor member between non-servoed and servoed positions in which said rotor members are spaced a first distance in said non-servoed position and said rotor members arc spaced a second distance greater than said first distance in said servoed position, said movable rotor member including a second inner face with a plurality of second pockets adjacent to said first inner face and a second friction surface spaced from said second inner face; a plurality of balls interposed between said first and second pockets with at least one of said first and second pockets being ramped; a friction member adjacent to said second friction surface and moveable between engaged and non-engaged positions in which said friction member is spaced from said second friction surface in said non-engaged position and said friction member is in contact with said second friction surface in said engaged position to rotate said movable rotor member to said servoed position and produce a supplemental brake clamping force; and wherein said driven rotor member is rotatable about an axis and said movable rotor member is movable relative to said driven rotor member about and along said axis between said non-servoed and servoed positions, and wherein one of said rotor members include a radial recess and the other of said rotor members includes a radial protrusion received in said radial recess that is smaller than said radial recess for permitting limited rotation of said moveable rotor member about said axis relative to said driven rotor member.