Tire rasp blades with renewable cutting and buffing edges

Blade for a rotatable tire rasp comprising a sheet metal member having an outer working edge and means spaced from said edge adapted for mounting the blade in said rasp, wherein the working edge thereof includes a plurality of teeth at least some of which have multi-pointed leading and trailing side edges, an outer edge, and an intermediately notched area interrupting the outer edge of said teeth, said multi-pointed side edges having first laterally projecting prong at the outer edge of the teeth and second laterally projecting prongs at a common level spaced inwardly of the first prongs.

Blade for a rotatable tire rasp having an outer working edge embodying a plurality of teeth having a leading edge, a trailing edge and an outer edge and in which teeth the leading edge thereof contains at least a first indentation which forms a first prong with the outer edge of the tooth and an inwardly spaced second indentation which forms a second prong with the first indentation, the underside of said first and second prongs of the leading edge being sloped at a positive angle, and the outer edge of the teeth intermediate their said leading and trailing edges being interrupted by a notch the trailing edge of which is at other than a positive rake angle.

A tire rasp blade comprising a sheet metal member having a convex outer working edge and means in the blade body spaced from said working edge by which the blade is adpated for mounting in a rasp, said outer working edge of the blade comprising a plurality of teeth separated by inner and outer intersecting circular cut-outs, said teeth having a leading side edge, a trailing side edge and an outer edge, the leading and trailing side edges of said teeth each having a first sharp prong defined by the intersection of the outer circular cut-outs with the tooth outer edge and a second sharp prong defined by the intersection of the inner and outer circular cut-outs, and a notch interrupting the outer edge of the teeth between the first prongs of their leading and trailing edges.

A tire rasp blade comprising a sheet metal member having a convex working edge and means in the blade body spaced from said working edge which adapt the blade for mounting in a rasp, said working edge comprising a plurality of spaced teeth the leading and trailing edges of which are defined by intersecting outer triangular and inner circular shaped cut-outs, the outer triangular shaped cut-outs interrupting the outer edge of the blades to form first sharp prongs with the outer edges of adjacent teeth, the inner circular-shaped cut-outs interrupting the base side of the triangular shaped cut-outs to form second sharp prongs spaced inwardly of said outer tooth edge, and the outer edge of the teeth being notched.

Blades for a tire rasp used to remove old rubber from worn or damaged surfaces in preparation for applying new rubber, the blades having a plurality of teeth along at least one edge thereof, said teeth having an outer cutting edge the face of which is inclined at a positive rake angle and forms a sharply acute outer prong with the outer tooth edge for cutting old rubber from a tire, said teeth also having an outer buffing edge the face of which is inclined at other than a positive rake angle for reducing the cut surface of the tire to a finely buffed texture, and said teeth having inner edges the face of one of which has a similar positive rake inclination as the face of the outer cutting edge and another of which inner edges has a face which is at a rake inclination similar to that of the outer buffing edge, said inner edges being located at levels below said outer cutting and buffing edges and to which the teeth may be sharpened so as to constitute cutting and buffing edges which extend the useful life of said teeth as their outer cutting and buffing edges become worn.