Document kDYow183NwBeGmGnrVwVevJRV

United States Patent 4,217,255 Page 2 of 9 vol 83 61074n, Less Abrasive Composition Railroad Brake Shoe Matenal, Adelmann C A vol 85 165565f, Glass-fiber-based friction matenal, Sasahara CA vol 79 8003 le, Fiber Strengthened Friction Matenal, Augustin Primary Examiner Woodberry, Edward M Attorney, Agent or Firm Greenlee, David A , Baker, Jr , Thomas S Parent Case Text This is a continuation of application Ser No 815,637, filed July 14, 1977, now abandoned Claims I claim 1. An asbestos-free and lead-free composition friction material, compnsing, by weight, 0 5-11% fiber, of which at least 0 5% is synthetic fiber, 66-81% filler and 14-21% organic binder The friction matenal of claim 1, wherein the fiber content includes at least 1% glass fiber 3 An asbestos-free and lead-free composition friction matenal, compnsmg, by weight, 1 5-10% fiber, of which at least 0 5% is synthetic fiber and at least 0 4% is cellulose fiber, 66-80% filler and 14-21% organic binder 4 The friction matenal of claim 3, wherein the fiber content includes at least 1 5% glass fiber 5 An asbestos-free and lead-free composition friction material, compnsmg, by weight, 5-10% fiber, of which at least 2 5% is synthetic fiber and at least 2 5% is cellulose fiber, 72-79% filler and 14-19% organic binder 6 The friction matenal of claim 5, wherein the synthetic fiber is glass fiber 7 An asbestos-free and lead-free composition friction material, compnsmg, by weight, 2-5% fiber, of which at least 1% is synthetic fiber and at least 0 5% is cellulose fiber, 72-82% filler and 14-21% organic binder 8 The friction matenal of claim 7, wherein the synthetic fiber is glass fiber 9 An asbestos-free and lead-free composition friction material, compnsmg, by weight, 0 5-7% synthetic fiber, 72-81% filler and 15-21% organic binder 0 The friction matenal of claim 9, wherein the synthetic fiber is glass fiber 11 An asbestos-free and lead-free composition friction material, compnsing, by weight, 0 5-2% synthetic fiber, 74-82% filler and 15-22% organic binder http //patft uspto gov/netacgi/nph-Parser?Sectl=PT02&Sect2=HITOFF&u=/netahtml/sea 10/18/2003