US3733664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting insert
Assignee: Kennametal Inc
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Filing: 1971-11-23
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Granted: 1973-05-22
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Expires: 1991-11-23
Abstract
Abstract The present invention is drawn to an indexable cutting insert having a cutting edge land and a chip controlling groove about the periphery of the cutting face of the said insert in a closed path wherein the transverse width of the groove is varied to provide more favorable chip controlling function when rates and depths of machining feeds are varied with the said insert during operational use.
Inventors
- 👤 Kelvey R Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:15
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/235
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
172 words
In a cutting insert; a body having parallel planar top and bottom faces and a peripheral wall extending between said faces at right angles thereto and forming edges therewith, said body when viewed in a direction perpendicular to a said face thereof being polygonal whereby said body has circumferentially spaced corners at the junctures of said edges, and groove means formed into at least one of said faces and extending in a closed path about the respective said face, said groove means intersecting the plane of the respective face of the body on the side of the groove means nearest the said peripheral wall of the body along a line parallel to and spaced from the said edges of the body, the other side of said groove means intersecting said plane of the respective face of the body along a line which curves so the groove means is narrowest at the said corners of the body and widest intermediate said corners, said groove means being of uniform depth throughout the length thereof.
Claim 2
Dependent Claim
172 words
In a cutting insert; a body having parallel planar top and bottom faces and a peripheral wall extending between said faces at right angles thereto and forming edges therewith, said body when viewed in a direction perpendicular to a said face thereof being polygonal whereby said body has circumferentially spaced corners at the junctures of said edges, and groove means formed into at least one of said faces and extending in a closed path about the respective said face, said groove means intersecting the plane of the respective face of the body on the side of the groove means nearest the said peripheral wall of the body along a line parallel to and spaced from the said edges of the body, the other side of said groove means intersecting said plane of the respective face of the body along a line which curves so the groove means is narrowest at the said corners of the body and widest intermediate said corners, said groove means being of uniform depth throughout the length thereof.
Claim 3
Dependent Claim
37 words
A cutting insert according to claim 1 in which the said line at the side of said groove means nearest said peripheral wall is spaced the same distance from each of the said edges of the body.
Claim 4
Dependent Claim
62 words
A cutting insert according to claim 1 in which the groove means on the side nearest said peripheral wall has one side wall portion making a large angle with the plane of the respective face of the body and on the opposite side has another side wall portion making a small angle with the plane of the respective face of the body.
Claim 5
Dependent Claim
38 words
A cutting insert according to claim 3 in which said groove means includes a bottom wall portion substantially parallel with the respective face of the body and extending between the said side wall portions at the bottom thereof.
Claim 6
Dependent Claim
21 words
A cutting insert according to claim 4 in which said one side wall portion is in the form of a fillet.
Claim 7
Dependent Claim
21 words
A cutting insert according to claim 4 in which said other side wall portion is in the form of an incline.
Claim 8
Dependent Claim
24 words
A cutting insert according to claim 4 in which said bottom wall is substantially uniform in width throughout the length of said groove means.
Claim 9
Dependent Claim
66 words
A cutting insert according to claim 7 in which said one side wall portion is in the form of a fillet leading from said bottom wall portion to the respective face of the insert and concave away from said body, and said other side wall portion is in the form of an incline leading from said bottom wall portion to said respective face of the body.
Claim 10
Dependent Claim
37 words
A cutting insert according to claim 8 in which the inclination of said incline is steepest at the corners of said body and decreases in steepness from each corner of the insert toward points intermediate the corners.
Claim 11
Dependent Claim
33 words
A cutting insert according to claim 9 in which said incline at the steepest part thereof forms an angle of about 12 degrees with the plane of the respective face of the body.
Claim 12
Dependent Claim
21 words
A cutting insert according to claim 1 in which said groove means comprises a groove in each face of said body.
Claim 13
Dependent Claim
36 words
A cutting insert according to claim 1 in which the said corners of said body are smoothly rounded and the opposite sides of said groove means are also smoothly rounded at said corners of said body.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |