Patent ID: 8016220

Claim:
A grinding mill having a rotatable drum with an inner surface and a liner system positioned on the inner surface of the rotatable drum, the liner system further comprising a plurality of lifter bars extending generally in the same direction as the axis of rotation of the drum and being circumferentially spaced apart around the inner surface of the drum so as to form channels between adjacently spaced lifter bars, and a plurality of liner assemblies, each liner assembly further comprising: a mounting member for securing the liner assembly to the inner surface of the rotatable drum, the mounting member having a surface for receiving an elastomeric cushioning member; an elastomeric cushioning member of selected hardness having a base wall operatively connected to the mounting member, opposed side walls, extending a distance K away from the base wall, which terminate at an outer edge, and an outer wall extending between the outer edges of the opposed side walls to define an outermost region of the outer wall, where the outermost region extends away from said base wall a distance which is greater than the distance K; a plurality of support cavities formed in the outermost region of said outer wall of said elastomeric cushioning member; and a plurality of wear elements having a selected hardness greater than said hardness of said elastomeric cushioning member, each support cavity having one of said wear elements mounted therein to provide wear elements in said outermost region of said outermost wall that are positioned to extend inwardly toward the rotational axis of the rotatable drum, wherein said liner assembly is disposed within respective channels formed between said spaced apart lifter bars, with the mounting members secured to the inner surface of the drum.