ROTARY GRINDER APPARATUS AND METHOD

摘要

A rotary grinder having a cylindrical drum (61) that includes a cylindrical surface (65). The cylindrical surface defines two holes (70, 72). The drum receives opposite ends of a through-member (76) at the two holes (70, 72) such that the opposite ends of the through-member comprise hammers when the cylindrical drum is rotated. A single retaining member (126) is used to secure all of the through-members to the drum.