Friction elements

Claim 1

A PROCESS AND MOLDED COMPOSITION FRICTION ELEMENT DISPLAYING SUBSTANTIALLY EQUAL WET AND DRY FRICTION AND CONSISTING ESSENTIALLY OF A NON-METALLIC ORGANIC BINDER MATRIX SUBJECT TO THERMAL DECOMPOSITION AND AFFORDING THE MAIN BODY OF THE FRICTION ELEMENT, AND HARD FILTER PARTICLES DISPERSED UNIFORMLY THROUGHOUT SAID MATRIX AND AFFORDING THE ESSENTIAL WET-DRY FRICTION EQUIVALENT; SAID FILLER PARTICLES IN PROPORTION CONSISTING ESSENTIALLY OF ABOUT TEN TO TWENTY PERCENT BY WEIGHT OF THE SHOE OF HEAT CONDUCTIVE CAST IRON PARTICLES WHICH TEND TO INCANDESCE AT HIGH TEMPERATURES ENGENDERED BY FRICTION AND WHICH SERVE TO CONDUCT HEAT ENGENDERED BY FRICTION AWAY FROM THE WEAR FACE OF THE FRICTION ELEMEN, AND IN ADDITION ABOUT TEN PERCENT BY WEIGHT OF A REFRACTORY HEAT INSULATING ALUMINUM SILICATE SELECTED FROM THE GROUP CONSISTING OF KYANITE, SILLIMANITE, ANDALUSITE, DUMORTIERITE, TOPAZ AND MULITE, SAID ALUMINUM SILICATE PARTICLES SERVING AS HEAT INSULATING BODIES AMONG THE CAST IRON PARTICLES TENDING TO SUPPRESS THE THERMAL DECOMPOSING EFFECT OF THE INCANDESCIBLE CAST IRON PARTICLES ON THE ORGANIC BINDER MATRIX; AND SAID ORGANIC BINDER MATRIX CONSISTING ESSENTIALLY OF A HEAT STABLE RUBBER.