Tire buffing machine blades

Claim 2

A replaceable blade for the rotating hub of a tire tread removing machine comprising a main body portion adapted for mounting on said hub and a working edge portion, said working edge portion comprising one or more teeth, said teeth having a leading relatively deep primary cutting edge of positive rake, and an outer edge, said outer tooth edge being interrupted by a cut-out presenting a shallower secondary cutting edge of positive rake spaced behind said primary cutting edge, said outer tooth edge further containing a tertiary buffing edge defined by the trailing edge of a slot disposed between said primary and secondary cutting edges.

Claim 3

The blade of claim 1 wherein the main body portion is generally planar and the working edge portion comprises a flange portion extending longitudinally of and angled to the main body portion.

Claim 4

The blade of claim 1 wherein said teeth have a further buffing edge of negative rake behind the secondary cutting edge.

Claim 5

The blade of claim 3 wherein the further buffing edge of said teeth lie in a plane including the leading primary cutting edge of said teeth.

Claim 6

The blade of claim 1 wherein the tertiary buffing edge is laterally offset from the leading primary cutting edge.

Claim 7

The blade of claim 5 wherein the secondary cutting edge is offset laterally to the opposite side of said plane including the primary cutting edge.

Claim 8

The blade of claim 3 wherein the secondary cutting edge and tertiary buffing edge of each tooth define a minor plane transversely angled to a major plane including the leading primary cutting edge and further buffing edge.

Claim 9

The blade of claim 7 wherein said minor plane of each tooth is oppositely set to the minor plane of the next succeeding tooth.

Claim 10

The blade of claim 1 wherein the tertiary buffing edge and secondary cutting edge lie in a common plane.

Claim 11

The blade of claim 9 wherein said teeth have a further buffing edge behind the secondary cutting edge and offset laterally therefrom.

Claim 12

The blade of claim 10 wherein the further buffing edge and leading primary cutting edge of said teeth lie to the same side of said common plane.

Claim 13

The blade of claim 11 wherein the further buffing edge and primary cutting edge of alternate teeth are disposed to opposite sides of said common plane.

Claim 14

A replaceable blade for the rotating hub of a tire tread removing machine comprising a sheet metal member having a convex-shaped outer working edge and means spaced inwardly of said working edge for mounting the blade on said hub, said working edge embodying spaced teeth at least some of which have radially deep outwardly diverging leading and trailing side edges and an interrupted outer edge with terminal portions which form sharp prongs with the outer termini of said side edges, said outer edge between said sharp prongs having an interrupting cut-out with radially shallower leading and trailing edges in outwardly converging relation, said outer edge having at least one indentation theRein between said cut-out and said sharp prongs, the portin of said outer edge between the indentation and cut-out being laterally offset from other portions of said outer edge on either side thereof.

Claim 15

A replaceable blade for the rotating hub of a tire tread removing machine comprising a sheet metal member having a convex-shaped outer working edge and means spaced inwardly of said working edge for mounting the blade on said hub, said working edge embodying spaced teeth at least some of which have radially deep outwardly diverging leading and trailing side edges and an interrupted outer edge with terminal portions which form sharp prongs with the outer termini of said side edges, said outer edge between said sharp prongs having an interrupting cut-out with radially shallower leading and trailing edges in outwardly converging relation, said outer edge having at least one indentation theRein between said cut-out and said sharp prongs, the portin of said outer edge between the indentation and cut-out being laterally offset from other portions of said outer edge on either side thereof.

Claim 16

A blade as claimed in claim 13 wherein said outer edge of the teeth have a non-radially inclined narrow slot on each side of the cut-out therebetween and the sharp prongs.

Claim 17

A blade as claimed in claim 14 wherein said narrow slots are in outwardly diverging relation.

Claim 18

A blade as claimed in claim 15 wherein portions of the outer tooth edge defined between the primary prongs and the narrow slots are twisted laterally of the tooth.

Claim 19

A blade as claimed in claim 15 wherein said portions of said outer edge defined between the cut-out and narrow slots are twisted laterally of the tooth.

Claim 20

A blade as claimed in claim 17 wherein said laterally twisted portions of the outer tooth edge defined by the cut-out and narrow slots are to opposite sides of the tooth.

Claim 21

A blade as claimed in claim 18 wherein said portions of the outer edge of alternate teeth are oppositely twisted to corresponding portions of the succeeding tooth.

Claim 22

A blade as claimed in claim 17 wherein said laterally twisted portions of the outer tooth edge are to the same side of the tooth and at an angle to each other.

Claim 23

A blade as claimed in claim 13 wherein said outer tooth edge has a pair of indentations, one between the cut-out and each said sharp prongs, the prongs being oppositely twisted and to the same side of the tooth.

Claim 24

A blade as claimed in claim 21 wherein the prongs of alternate teeth lie to the opposite side to which the prongs of the intervening teeth are displaced.

Claim 25

A replaceable blade for the rotating hub of a tire tread removing machine comprising a sheet metal member having a working edge including a plurality of widely spaced and radially deep teeth each having outwardly diverging leading and trailing side edges and an interrupted outer edge, the opposed terminal portions of which outer tooth edge form acutely sharp primary prongs with the respective leading and trailing side edge of the teeth, said outer tooth edge further including a cut-out with outwardly converging lead and trail edges having a depth less than that of the tooth and which lead and trail edges form acutely sharp secondary prongs with portions of the tooth outer edge on either side of the cut-out, at least one of the portions of said outer tooth edge further having a slot between the adjacent primary prongs and the cut-out, the edges of said slots being inclined to said outer tooth edge and laterally offset from each other.

Claim 26

A replaceable blade for the rotating hub of a tire tread removing machine comprising a sheet metal member having a working edge including a plurality of widely spaced and radially deep teeth each having outwardly diverging leading and trailing side edges and an interrupted outer edge, the opposed terminal portions of which outer tooth edge form acutely sharp primary prongs with the respective leading and trailing side edge of the teeth, said outer tooth edge further including a cut-out with outwardly converging lead and trail edges having a depth less than that of the tooth and which lead and trail edges form acutely sharp secondary prongs with portions of the tooth outer edge on either side of the cut-out, at least one of the portions of said outer tooth edge further having a slot between the adjacent primary prongs and the cut-out, the edges of said slots being inclined to said outer tooth edge and laterally offset from each other.

Claim 27

A replaceable blade as claimed in claim 23 wherein the blade comprises an annular section having a body portion adapted for mounting on the rotating hub of a tire buffing machine and an integral frusto-conical outer section extending longitudinally of said body portion which contains said working edge.

Claim 28

A replaceable tire rasp blade comprising a sheet metal member having an outer working edge of generally convex arcuate shape which includes a plurality of outwardly projecting generally dove-tail shaped teeth, at least some of which have an interrupted outer edge and opposed concave-shaped leading and trailing side edges, said leading and trailing side edges diverging inwardly adjacent the root of the tooth to afford a broad base for the tooth and diverging outwardly adjacent the outer tooth edge to form with said outer tooth edge oppositely directed sharp primary prongs, said outer tooth edge being interrupted by a circular shaped cut-out having a mouth less than its diameter, opposed side edges of said cut-out adjacent said mouth converging outwardly to form sharp secondary prongs with said outer tooth edge spaced between said primary prongs, the diameter of said circular cut-out being less than the depth and height of the tooth, and inwardly diverging narrow slots interrupting said outer tooth edge, one on each side of the side edges of each said slOts being disposed laterally of said primary prongs.

Claim 29

A replaceable tire rasp blade comprising a sheet metal member having an outer working edge of generally convex arcuate shape which includes a plurality of outwardly projecting generally dove-tail shaped teeth, at least some of which have an interrupted outer edge and opposed concave-shaped leading and trailing side edges, said leading and trailing side edges diverging inwardly adjacent the root of the tooth to afford a broad base for the tooth and diverging outwardly adjacent the outer tooth edge to form with said outer tooth edge oppositely directed sharp primary prongs, said outer tooth edge being interrupted by a circular shaped cut-out having a mouth less than its diameter, opposed side edges of said cut-out adjacent said mouth converging outwardly to form sharp secondary prongs with said outer tooth edge spaced between said primary prongs, the diameter of said circular cut-out being less than the depth and height of the tooth, and inwardly diverging narrow slots interrupting said outer tooth edge, one on each side of the side edges of each said slOts being disposed laterally of said primary prongs.

Claim 30

A tire rasp blade as claimed in claim 25 wherein portions of the outer tooth edge containing the edge of said slots toward the primary prongs are offset from said primary prongs.

Claim 31

A tire rasp blade as claimed in claim 26 wherein the respective edges of said slots directed toward the primary prongs are offset to the same side of the tooth.

Claim 32

A tire rasp blade as claimed in claim 26 wherein one of the portions of the outer tooth edge containing the edge of one slot is offset to one side of the tooth and the portion of the tooth outer edge containing the edge of the other slot is offset to the opposite side of the tooth.

Claim 33

A tire rasp blade as claimed in claim 27 wherein the edge of said slots toward the primary prongs are offset to the same side of the teeth and in every other tooth said offset is reversed.

Claim 34

A tire rasp blade as claimed in claim 28 wherein the portions of the outer tooth edge containing the edges of the slots toward the primary prongs are disposed transversely to the primary prongs.

Claim 35

A tire rasp blade as claimed in claim 30 wherein in some of the teeth in line of the portions of the outer tooth edge containing the edges of the slotss directed toward the primary prongs is set at an angle to the line of the corresponding portions of the outer tooth edge of the other teeth.

Claim 36

A replaceable blade for the rotating hub of a tire detreading machine comprising a sheet metal member having an interrupted working edge and a main body portion adapted for mounting to said hub to locate the blade on said hub, said working edge comprising spaced relatively deep primary cut-outs, the trailing edge of at least some of which constitute hook-shaped primary cutting edges interrupting the working edge at a sharp angle, said working edge being interrupted by other cut-outs of shallower depth interspaced between said relatively deep primary cut-outs, at least some of said shallower cut-outs having their trailing edge also of hook-shape and constituting secondary cutting edges sharply intersecting said working edge, and further of said shallower cut-outs having their trailing edge intersecting said working edge at a more blunted angle to said working edge.

Claim 37

A replaceable blade for the rotating hub of a tire detreading machine comprising a sheet metal member having an interrupted working edge and a main body portion adapted for mounting to said hub to locate the blade on said hub, said working edge comprising spaced relatively deep primary cut-outs, the trailing edge of at least some of which constitute hook-shaped primary cutting edges interrupting the working edge at a sharp angle, said working edge being interrupted by other cut-outs of shallower depth interspaced between said relatively deep primary cut-outs, at least some of said shallower cut-outs having their trailing edge also of hook-shape and constituting secondary cutting edges sharply intersecting said working edge, and further of said shallower cut-outs having their trailing edge intersecting said working edge at a more blunted angle to said working edge.

Claim 38

A replaceable blade according to claim 32 wherein said working edge comprises a flanged portion angled to the main body portion of the blade.

Claim 39

A replaceable blade according to claim 32 wherein the further of said shallower cut-outs are slots arranged in inwardly converging relation and on opposite sides of the shallower cut-outs therebetween and the primary relatively deep cut-outs.

Claim 40

A replaceable blade according to claim 32 wherein said primary and secondary cutting edges and buffing edges are arranged in an opened spaced relation.

Claim 41

A replaceable blade for the rotating hub of a tire tread removing machine comprising a sheet metal member having a working edge along at least one end, including at least one relatively deep tooth, said tooth having outwardly diverging leading and trailing side edges and an interrupted outer edge, the opposed terminal portions of which outer tooth edge form acutely sharp primary prongs with the respective leading and trailing side edge of the tooth, said outer tooth edge further including a cut-out with outwardly converging lead and trail edges having a depth less than that of the tooth and which lead and trail edges form acutely sharp secondary prongs with portions of the tooth outer edge on either side of the cut-out, at least one of the portions of said outer tooth edge further having a slot between the adjacent primary prong and the cut-out, the edges of said slot being inclined to said outer tooth edge.

Claim 42

A replaceable blade for the rotating hub of a tire tread removing machine comprising a sheet metal member having a working edge along at least one end, including at least one relatively deep tooth, said tooth having outwardly diverging leading and trailing side edges and an interrupted outer edge, the opposed terminal portions of which outer tooth edge form acutely sharp primary prongs with the respective leading and trailing side edge of the tooth, said outer tooth edge further including a cut-out with outwardly converging lead and trail edges having a depth less than that of the tooth and which lead and trail edges form acutely sharp secondary prongs with portions of the tooth outer edge on either side of the cut-out, at least one of the portions of said outer tooth edge further having a slot between the adjacent primary prong and the cut-out, the edges of said slot being inclined to said outer tooth edge.

Claim 43

A replaceable blade as claimed in claim 36 wherein the blade comprises a segment having a body portion adapted for mounting on the rotating hub of a tire buffing machine with like segments so as to expose their outer working edge beyond the periphery of the rotating hub and iN a circular form thereabout.

Claim 44

A replaceable blade as claimed in claim 37 wherein the blade has a second tooth corresponding to said one tooth and on the opposite end of its said body portion to that including the one tooth.

Claim 45

A replaceable blade as claimed in claim 37 wherein said working edge lies generally in a plane at an angle to the plane of the body portion.