Patent ID: 8231071

Claim:
A blade set associated with jaws for demolition equipment, wherein at least one jaw rotates relative to the other jaw about a rotational axis within a common rotational plane, the blade set comprising: a) a bottom blade adapted to be secured to the bottom jaw, wherein the bottom blade has: 1) a first radial axis therethrough and within the rotational plane; 2) two opposing raised support rails, each having: i) planar surface segments integral with the support rails, generally perpendicular to the rotational plane and extending parallel to the first radial axis; ii) recesses between the planar surface segments, wherein the recesses extend across the width of the support rail and the recesses of one support rail are aligned with corresponding recesses of the other opposing support rail; 3) a cavity extending between and adjacent to the support rails; b) a top blade adapted to be secured to the top jaw, wherein the top blade has: 1) a second radial axis therethrough and within the rotational plane; 2) a raised knife rail having: i) planar surface segments integral with the knife rail, generally perpendicular to the rotational plane and extending parallel to the second radial axis; ii) recesses between the planar surface segments, wherein the recesses extend across the width of the knife rail; iii) wherein the width of the knife rail at the planar surface segments is less than the width at the opening of the cavity; c) wherein the top blade and the bottom blade are symmetric about the rotational plane; d) wherein the top blade and the bottom blade pivot about a common axis; e) wherein, for the raised support rails of the bottom blade, the lengths of the respective blade planar surface segments between recesses are longer than the lengths of the recesses to minimize wear of the blade; and f) wherein, for the raised knife of the top blade, the lengths of the respective blade planar surface segments between recesses are longer than the lengths of the recesses to minimize wear of the blade.