Aircraft brake

In an aircraft multiple brake disc assembly having an axis means with a central axis;

• a wheel member journaled on said axle means for rotation thereon;
• said wheel member having an inner peripheral portion with a plurality of circumferentially spaced splines;
• a plurality of axially spaced rotor brake discs mounted on said axle means and keyed to said splines for rotation with said wheel member;
• said axle means having a stationary hub;
• a torque tube secured to said hub;
• said torque tube having a plurality of circumferentially spaced axially extending ribs;
• a plurality of axially spaced stator brake discs mounted on said axle means and keyed to said ribs for axial movement thereon;
• said rotor discs interleaved with said stator discs;
• a piston housing secured to said hub;
• one of said stator discs being closely adjacent to said piston housing defining a pressure plate for said rotor and stator brake discs;
• a plurality of circumferentially spaced cylinders mounted on said piston housing;
• each cylinder having a bore therein with an end plate at one end thereof;
• a piston member slidably mounted in each of said bores and cooperative with an adjacent end plate of said cylinder to define piston chambers;
• each piston member having an elongated cylindrically shaped sleeve member;
• each sleeve member having a piston head that extends out of said bore of said cylinder;
• each of said piston heads having an inner cap and an outer cap integral therewith;
• said inner cap having an annular rearwardly disposed portion secured to said sleeve member;
• said outer caps being operative to frictionally engage said pressure plate;
• said inner cap and outer cap of each piston head having annular mating surfaces with the annular mating surface of said inner cap having a convex shape to allow pivoting movement of the outer cap relative to the inner cap upon deflection of said piston housing upon brake application to distribute forces away from the axis of said cylindrically shaped sleeve member.