Back to results
US 4,091,516 AGranted
Tire rasp blade having multi-cutting edges
AssigneeB & J Manufacturing Company
InventorsWayne Emil Jensen, Charles Keith Stanfield
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeB & J Manufacturing Company
InventorsWayne Emil Jensen, Charles Keith Stanfield
Estimating the term…
The outer edge of teeth of tire buffing machine blades is interrupted by oppositely curved arcuate slots which are cupped on centers disposed below the center on which the adjacent one of the leading and trailing deeper cutting side edges of the tooth are cupped. Between said arcuate slots, the outer edge has a shallower arcuate notch the ends of which are obtuse to the tooth outer edge. The portions of the tooth outer edge between the arcuate slots and the tooth cutting side edges are displaced laterally to opposite sides of the teeth and the inner portions of the tooth outer edge between said arcuate slots and the notch are transversely offset to the remainder of the tooth such that the teeth successively present to the tire surface being buffed a first sharply acute deeply cutting edge, then a sharply acute lighter cutting edge of shallower depth followed by an obtuse buffing edge and a more bluntly obtuse second buffing edge which act to finish the tire surface to a required texture.
A tire rasp blade having a body portion adapted for assembly in the hub of a tire buffing machine and a working edge portion embodying one or more teeth having an outer tooth edge, a leading side edge and a trailing side edge, said leading side edge embodying an arcuate segment of a circle having a center which leads said leading side edge and intersects the outer tooth edge at a sharply acute angle, the outer tooth edge being interrupted by a notch having a trailing edge which intersects the outer edge at a bluntly obtuse angle, and a first arcuate slot interrupting said outer tooth edge between said notch and the leading side edge, said first arcuate slot comprising a segment of a circle having a center preceding the leading side edge of the tooth, the trailing edge of the first arcuate slot intersecting said outer tooth edge at a sharply acute angle therewith, the leading side edge of the tooth being displaced to one side of the blade working edge portion, the trailing edge of the first arcuate slot being displaced to the opposite side thereof, and the trailing edge of the notch placed therebetween.
A tire rasp blade having a main body portion adapted for mounting in the hub of a tire buffing machine and a convex outer edge interrupted by a plurality of circular-shaped openings which define the leading and trailing edges of teeth therebetween, the width of the mouth of said opening between the teeth outer edges being substantially less than the diameter of said openings such that the leading and trailing side edges of the teeth defined therebetween are sharply acute to the outer edge of the teeth, the outer edge of the teeth having a notch intermediately disposed between the leading and trailing side edges of the teeth, said notch embodying an arcuate segment of a circle the center of which is above the outer tooth edge such that the lead and trail edges of the notch intersect the outer tooth edge at obtuse angles thereto, a first arcuate slot interrupting the outer edge portion of the tooth between the notch and the leading side edge of the tooth, a second arcuate slot interrupting the outer edge portion of the tooth between the notch and the trailing side edge of the tooth, said first arcuate slot embodying a segment of a circle the center of which leads the leading side edge of the tooth and is spaced below the center of the circle of which the leading side edge of the tooth is a segment, said second arcuate slot embodying a segment of a circle the center of which trails the trailing side edge of the tooth and is spaced below the center of the circle of which the trailing side edge of the tooth is a segment, said arcuate slots terminating below the depth of the notch and so as to leave substantial tooth material between the notch edge and adjacent tooth side edge, the trailing edge of the first arcuate slot being sharply acute to the outer tooth edge, the trailing edge of the second arcuate slot being severely obtuse to the outer tooth edge, the portion of the outer tooth edge between the leading side edge of the tooth and the first arcuate slot being displaced laterally to one side of the tooth, the portion of the outer edge of the tooth between the trailing side edge of the tooth and the second arcuate slot being displaced laterally to the opposite side of the tooth and the portions of the outer tooth edge between the notch and the arcuate slots being transversely offset to the teeth.
Dependencies are inferred from the claim text.