US4447175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting insert
Assignee: Kennametal PC Inc
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Filing: 1982-06-17
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Granted: 1984-05-08
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Expires: 2002-06-17
Abstract
Abstract A cutting insert within indexable cutting edges with a chipbreaker configuration which comprises discrete recesses spaced along the length of the cutting insert. The cutting insert has a descending wall that joins the cutting edge or the land behind the cutting edge with a planar floor that extends toward the center of the insert. The recesses are formed in the descending wall adjacent the cutting edge or land behind the cutting edge and are concave facing outwardly as they extend inwardly of the insert. The inserts are coated, preferably, with a TiN over TiC chemical vapor deposition coating.
Inventors
- 👤 Donald W. Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:18
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; B23B2200/00; B23B2200/08; B23B2200/085; B23B2200/20; B23B2200/205; B23B2200/32; B23B2200/323; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/235; Y10T407/24; Y10T407/245
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
A cutting insert for removing material from a workpiece which comprises: a body that has top and bottom faces and a peripheral wall joining said faces; said body having a polygonal shape when viewed in plan; cutting edges formed at the juncture of said peripheral wall with one of said top and bottom faces; a land area extending inwardly from the cutting edge; a planar descending wall extending from the land area downwardly to a planar floor which extend toward the center of said body; individual discrete recesses for imparting a stiffer configuration to the material removed from the workpiece, said recesses formed and spaced inwardly from and along the length of the cutting edges in the upper portion of said planar descending wall; said recesses when viewed in side appearing concave facing outwardly and extending from the land area inwardly, and portions of said planar descending wall forming side walls separating and bounding said recesses.
Claim 2
Dependent Claim
156 words
A cutting insert for removing material from a workpiece which comprises: a body that has top and bottom faces and a peripheral wall joining said faces; said body having a polygonal shape when viewed in plan; cutting edges formed at the juncture of said peripheral wall with one of said top and bottom faces; a land area extending inwardly from the cutting edge; a planar descending wall extending from the land area downwardly to a planar floor which extend toward the center of said body; individual discrete recesses for imparting a stiffer configuration to the material removed from the workpiece, said recesses formed and spaced inwardly from and along the length of the cutting edges in the upper portion of said planar descending wall; said recesses when viewed in side appearing concave facing outwardly and extending from the land area inwardly, and portions of said planar descending wall forming side walls separating and bounding said recesses.
Claim 3
Dependent Claim
30 words
A cutting insert according to claim 1 in which said cutting edge is formed at the juncture of said peripheral wall and only one of said top and bottom faces.
Claim 4
Dependent Claim
32 words
A cutting insert according to claim 1 in which recesses are uniformly shaped and form portions of an imaginary cylinder having a longitudinal axis that runs parallel to the adjacent cutting edge.
Claim 5
Dependent Claim
21 words
A cutting insert according to claim 3 in which said imaginary cylinder has a radius of from 0.030 to 0.50 inches.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |