Self biased collet and seal retainer for disc brakes

Claim 1

IN COMBINATION WITH A DISC BRAKE COMPRISING, A BRAKE HOUSING WITH A CYLINDER BORE THERIN, A HEAD CLOSING ONE END OF THE BORE AND HAVING A REDUCED BORE THEREIN, A PISTON SLIDABLY CARRIED IN THE CYLINDER BORE TO PROJECT FROM THE OTHER END OF THE BORE AND HAVING LINING CARRIED ON SAID PROJECTING PISTON TO ENGAGE A BRAKE DISC, AND A RELEASE UNIT FOR RETRACTING THE PISTON INTO THE CYLINDER BORE AND COMPRISING A HEAD RECESSED IN THE PISTON AND AN INDICATOR STEM PROJECTING THERFROM AND INTO THE SAID REDUCED BORE, THERE BEING A RETRACTING SPRING URGING THE PISTON INTO ENGAGEMENT WITH THE RELEASE UNIT HEAD, AND MEANS RETAINING THE RELEASE UNIT HEAD WITHIN THE SAID RECESS WITH LIMITED MOVEMENT, A SELF BIASED COLLET INCLUDING: (A) A RING CARRIED WITH CLEARANCE IN SAID REDUCED BORE AND SURROUNDING THE INDICATOR STEM, (B) SPRING FINGERS EXTENDING LONGITUDINALLY FROM THE RING AND WITH PADS AT THE TERMINAL ENDS THEREOF PRESSED ONTO THE SAID INDICATOR STEM TO FRICTIONALLY ENGAGE THE SAME, (C) AND AN ANNULAR GROOVE TURNED IN THE OUTER DIAMETER OF THE RING AT AND MEASURABLY WEAKENING THE FINGERS FOR CONTROL OF SAID FRICTIONAL ENGAGEMENT WITH THE INDICATOR STEM.