Patent ID: 6913329
Filing Date: 2005-07-05
Classification: B62D

Abstract:
1. An endless rubber track designed to encompass a combination of at least one vehicular drive wheel and at least one vehicular guide wheel is provided wherein said rubber track has an outer tread comprised of a plurality of raised rubber lugs designed to be ground engaging and an inner surface comprised of a plurality of spaced apart rubber guide lugs designed to be guided and/or engaged by said vehicular drive wheel, and a rubber guide lug support layer, wherein said guide lugs are positioned on and co-vulcanized and integral with said guide lug supporting rubber layer, wherein said guide lug support layer is positioned on and integral with the inner surface of said rubber track; and wherein said guide lug support layer is of a rubber composition comprised of, based upon 100 parts by weight elastomers (phr), (A) said elastomers comprised of (B) about 30 to about 70 phr of reinforcing filler selected from rubber reinforcing carbon black and synthetic amorphous silica comprised of about 40 to about 70 phr of said carbon black and from zero to about 50 phr of said silica, and (C) a coupling agent for said silica having a moiety which is reactive with hydroxyl groups (silanol groups) contained on the surface of said silica and another moiety interactive with said diene based elastomer(s).