Adzer bit with cutting segments
First Claim
Patent Images
1. An adzer bit, comprising:
- a base member;
a cutting segment cap coupled to the base member and formed of a first material; and
a plurality of cutting segments axially disposed between the base member and the cutting segment cap and formed of a second material, the second material being harder than the first material, wherein each cutting segment comprises a leading surface, an outer arcuate surface, and a cutting edge disposed at a junction of the leading surface and the outer arcuate surface; and
wherein each cutting segment is defined by the outer arcuate surface, an inner arcuate surface, and a plurality of opposed end surfaces, an end surface of one cutting segment contacting an end surface of an adjacent cutting segment;
wherein the base member and the cutting segment cap define a through hole configured to receive a fastener to couple the adzer bit to an adzer head.
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Accused Products
Abstract
An adzer bit includes a support member that defines a through hole that is configured to receive a fastener. The support member includes a cutting segment cap portion and a base portion. The support member also defines an annular slot that is axially disposed between the cutting segment cap portion and the base portion. A plurality of cutting segments are received and secured in the annular slot. The material of the plurality of cutting segments is harder than the material of the support member.
9 Citations
24 Claims
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1. An adzer bit, comprising:
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a base member; a cutting segment cap coupled to the base member and formed of a first material; and a plurality of cutting segments axially disposed between the base member and the cutting segment cap and formed of a second material, the second material being harder than the first material, wherein each cutting segment comprises a leading surface, an outer arcuate surface, and a cutting edge disposed at a junction of the leading surface and the outer arcuate surface; and wherein each cutting segment is defined by the outer arcuate surface, an inner arcuate surface, and a plurality of opposed end surfaces, an end surface of one cutting segment contacting an end surface of an adjacent cutting segment; wherein the base member and the cutting segment cap define a through hole configured to receive a fastener to couple the adzer bit to an adzer head. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14, 15)
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10. A method for forming an adzer bit, comprising:
securing a plurality of cutting segments to a support member comprising a cutting segment cap portion and a base portion, the cutting segments being secured axially between the cutting segment cap portion and the base portion, each of the plurality of cutting segments defining a leading surface, an outer arcuate surface, and a cutting edge disposed at a junction of the leading surface and the outer arcuate surface, the cutting edge extending radially beyond a periphery of the cutting segment cap portion, an end of a first cutting segment contacting an adjacent end of an adjacent cutting segment, and the support member comprising a first material and the plurality of cutting segments comprising a second material, the second material being harder than the first material, wherein the base portion and the cutting segment cap portion define a through hole configured to receive a fastener to couple the adzer bit to an adzer head. - View Dependent Claims (11, 12, 13)
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16. An adzer head, comprising:
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a plurality of bit support portions circumferentially spaced about a central opening, each bit support portion supporting an adzer bit; at least one of the adzer bits, comprising; a base member; a cutting segment cap coupled to the base member and formed of a first material; and a plurality of cutting segments axially disposed between the base member and the cutting segment cap and formed of a second material, the second material being harder than the first material, wherein each cutting segment comprises a leading surface, an outer arcuate surface, and a cutting edge disposed at a junction of the leading surface and the outer arcuate surface, wherein the base member and the cutting segment cap define a through hole configured to receive a fastener to couple the at least one adzer bit to the adzer head; a first cutting segment of the plurality of cutting segments is disposed in a cutting position such that a first cutting edge of the first cutting segment is disposed to shear a surface; wherein a second cutting segment of the plurality of cutting segments separate from the first cutting segment is disposed in a reserve-cutting position such that a second cutting edge of the second cutting segment is disposed to not contact the surface as the adzer head rotates; and wherein a crack in the first cutting segment is isolated to the first cutting segment and will not propagate to the second cutting segment. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification