Self-sharpening cutting tooth for a felling apparatus
AssigneeDeere & Company
InventorsAdam G. Harwood, Russell R. Reeg
Life of this patent
Estimating the term…
Abstract
A cutting tooth includes a tooth body having a mounting side, a front face spaced from the mounting side, and a plurality of lateral faces extending between the mounting side and the front face, the tooth body having an interior hardness, and a coating applied to at least one of the lateral faces to form a lateral hardface, the lateral hardface having a hardface hardness greater than the interior hardness, an edge of the lateral hardface closest to the front face and a portion of the front face adjacent the edge of the lateral hardface defining a cutting edge region of the tooth.
Claims12
A cutting tooth for the cutting head of a felling apparatus for felling trees, comprising:
- a hardened tooth body having an interior hardness in a range from about 25 to about 35 Rockwell C, and having a hardened outer body layer having an outer body layer hardness in a range from about 58 to about 64 Rockwell C;
- the tooth body having a mounting side, a front face spaced from the mounting side, and a plurality of lateral faces extending between the mounting side and the front face;
- and
- a hardface formed on at least one of the lateral faces, the hardface having a hardface hardness that is at least about 65 Rockwell C.
A cutting tooth for the cutting head of a felling apparatus for felling trees, comprising:
- a hardened tooth body having an interior hardness, and having a hardened outer body layer having an outer body layer hardness greater than the interior hardness;
- the tooth body having a mounting side, a front face spaced from the mounting side, and a plurality of lateral faces extending between the mounting side and the front face;
- and
- a hardface and a second hardface are formed on two respective ones of the lateral faces, the hardfaces having a hardface hardness greater than the outer body layer hardness, so that a worn tooth can be removed from a cutting implement and rotated about a central axis of the cutting tooth to remount the cutting tooth on the cutting implement.
A cutting tooth for the cutting head of a felling apparatus for felling trees, comprising:
- a hardened tooth body having an interior hardness, and having a hardened outer body layer having an outer body layer hardness greater than the interior hardness;
- the tooth body having a mounting side, a front face spaced from the mounting side, and a plurality of lateral faces extending between the mounting side and the front face;
- and
- a hardface formed on at least one of the lateral faces, the hardface having a hardface hardness greater than the outer body layer hardness;
- wherein in an unworn state of the tooth the front face is concave such that the at least one lateral face extends forward beyond a central portion of the front face;
- and
- the hardface extends forward beyond the central portion of the front face.
Dependencies are inferred from the claim text.