US4140431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting insert
Assignee: Kennametal Inc
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Filing: 1977-11-18
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Granted: 1979-02-20
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Expires: 1997-11-18
Abstract
Abstract A cutting insert, especially for milling cutters and the like, and which is to be mounted in a tool holder in a negative radial rake position. The insert is indexable and invertable and has a cutting edge means. The peripheral wall adjacent the cutting edge means has recesses therein which interrupt the cutting edge means. The depth of the recesses becomes shallower as the recesses extend away from the cutting edge means until the recess terminates in the peripheral wall. An insert having at least two cutting edges is described wherein the insert has at least two cutting edges and the recesses interrupting one cutting edge are staggered relative to the recesses interrupting the other cutting edge when the cutting edges are viewed in superposed relation.
Inventors
- 👤 Ernest J. Friedline
- 👤 Donald W. Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:07
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2265; B23C5/2269; B23C5/202; B23C2200/00; B23C2200/12; B23C2200/125; B23C2200/20; B23C2200/206; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1952; Y10T407/1962; Y10T407/23; Y10T407/235
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
135 words
A cutting insert comprising: a body of hard wear resistant material having spaced substantially parallel faces that are polygonal when viewed in plan; a peripheral wall extending between said faces; cutting edge means comprising at least two cutting edges formed at the juncture of said peripheral wall and at least one of said faces, said peripheral wall having recesses formed therein interrupting said cutting edge means; said recesses interrupting one cutting edge of said insert being staggered relative to the recesses interrupting the other cutting edge of the insert when said cutting edges are viewed in superposed relation; the depth of said recesses in said peripheral wall decreasing as the recess extends away from said cutting edge means; and said two cutting edges formed one on each face along the same side of said insert.
Claim 2
Dependent Claim
135 words
A cutting insert comprising: a body of hard wear resistant material having spaced substantially parallel faces that are polygonal when viewed in plan; a peripheral wall extending between said faces; cutting edge means comprising at least two cutting edges formed at the juncture of said peripheral wall and at least one of said faces, said peripheral wall having recesses formed therein interrupting said cutting edge means; said recesses interrupting one cutting edge of said insert being staggered relative to the recesses interrupting the other cutting edge of the insert when said cutting edges are viewed in superposed relation; the depth of said recesses in said peripheral wall decreasing as the recess extends away from said cutting edge means; and said two cutting edges formed one on each face along the same side of said insert.
Claim 3
Dependent Claim
27 words
A cutting insert according to claim 1 wherein said faces are polygonal when viewed in plan and said cutting edge means comprise at least two cutting edges.
Claim 4
Dependent Claim
40 words
A cutting insert according to claim 2 wherein the recesses interrupting one cutting edge of said insert are staggered relative to the recesses interrupting the other cutting edge of the insert when said cutting edges are viewed in superposed relation.
Claim 5
Dependent Claim
21 words
A cutting insert according to claim 3 in which said recesses are uniformly spaced along the peripheral wall of said insert.
Claim 6
Dependent Claim
46 words
A cutting insert according to claim 4 in which said recesses in one cutting edge are asymmetrically disposed about an axial centerline of the insert so that the recesses of one cutting edge are staggered relative to the other cutting edge when viewed in superposed relation.
Claim 7
Dependent Claim
31 words
A cutting insert according to claim 3 wherein the number of recesses interrupting one cutting edge are equal to the number of recesses interrupting the other of two said cutting edges.
Claim 8
Dependent Claim
31 words
A cutting insert according to claim 3 wherein the number of recesses interrupting one cutting edge are unequal to the number of recesses interrupting the other of two said cutting edges.
Claim 9
Dependent Claim
20 words
A cutting insert according to claim 2 wherein said two cutting edges are angularly related and adjacent to one another.
Claim 10
Dependent Claim
21 words
A cutting insert according to claim 1 wherein said recesses become narrower as they extend away from said cutting edge means.
Claim 11
Dependent Claim
26 words
A cutting insert according to claim 1 in which said recesses terminate in said peripheral wall without interrupting the other of said one of said faces.
Claim 12
Dependent Claim
139 words
A cutting insert comprising: a body of hard wear resistant material having spaced substantially parallel faces that are polygonal when viewed in plan; a peripheral wall extending between said faces; cutting edge means comprising at least two cutting edges formed at the juncture of said peripheral wall and at least one of said faces, said peripheral wall having recesses formed therein interrupting said cutting edge means; said recesses interrupting one cutting edge of said insert being staggered relative to the recesses interrupting the other cutting edge of the insert when said cutting edges are viewed in superposed relation; the depth of said recesses in said peripheral wall decreasing as the recess extends away from said cutting edge means; and said two cutting edges are formed one on each of two opposing sides on the same face of the insert.
Claim 13
Dependent Claim
139 words
A cutting insert comprising: a body of hard wear resistant material having spaced substantially parallel faces that are polygonal when viewed in plan; a peripheral wall extending between said faces; cutting edge means comprising at least two cutting edges formed at the juncture of said peripheral wall and at least one of said faces, said peripheral wall having recesses formed therein interrupting said cutting edge means; said recesses interrupting one cutting edge of said insert being staggered relative to the recesses interrupting the other cutting edge of the insert when said cutting edges are viewed in superposed relation; the depth of said recesses in said peripheral wall decreasing as the recess extends away from said cutting edge means; and said two cutting edges are formed one on each of two opposing sides on the same face of the insert.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |