Patent ID: 7621477

Claim:
A metallic based hammer for use in a rotatable hammermill assembly comprising: a. a first end for securement within said hammermill assembly; b. a rod hole, said rod hole centered in said first end for engagement with and attachment to said hammermill assembly; c. a second end for contact and delivery of momentum to material to be comminuted; d. a neck connecting said first hammer end to said second hammer end; e. a first shoulder adjacent to and surrounding at least a portion of said rod hole, wherein the thickness of said first shoulder is greater than the thickness of said neck, and wherein the thickness of said first shoulder is greater than the thickness of said first end; and f. a second shoulder adjacent to and surrounding at least a portion of said rod hole and adjacent said neck, wherein the thickness of said second shoulder is greater than the thickness of said neck, wherein the thickness of said second shoulder is greater than the thickness of said first end, wherein the distance around the periphery of said first shoulder is greater than that of said second shoulder so that said first shoulder and said second shoulder are non-symmetrical about the longitudinal axis of said rod hole.