US4116576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting insert
Assignee: Newcomer Products Inc
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Filing: 1977-04-25
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Granted: 1978-09-26
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Expires: 1997-04-25
Abstract
Abstract A cutting insert for controlling the removal of metal from a workpiece. A cutting edge of the insert is formed by the intersection of a peripheral wall surface with a raised land planar surface. A first curved portion adjoins the land surface and a descending wall surface. A second curved portion adjoins the descending wall surface and a lower planar surface substantially parallel to the land surface.
Inventors
- 👤 William C. Gawryk, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:55
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/235; Y10T407/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
135 words
A cutting insert for controlling the removal of metal from a workpiece having: (a) a peripheral wall surface; (b) a planar land surface intersecting the peripheral wall surface; (c) a cutting edge formed by the intersection of the peripheral wall and the planar surface; (d) a first curved surface having a radius of from 0.006 to 0.018 inches adjoining and extending from the planar land surface; (e) an inner wall surface descending from the first curved surface inwardly of the peripheral wall surface; (f) a second curved surface descending from the inner wall surface and having a radius of from 0.006 to 0.018 inches; and (g) a lower planar surface parallel to the planar land surface and adjoining and extending from the second curved surface thereby forming one continuous surface within the insert cutting edge.
Claim 2
Dependent Claim
135 words
A cutting insert for controlling the removal of metal from a workpiece having: (a) a peripheral wall surface; (b) a planar land surface intersecting the peripheral wall surface; (c) a cutting edge formed by the intersection of the peripheral wall and the planar surface; (d) a first curved surface having a radius of from 0.006 to 0.018 inches adjoining and extending from the planar land surface; (e) an inner wall surface descending from the first curved surface inwardly of the peripheral wall surface; (f) a second curved surface descending from the inner wall surface and having a radius of from 0.006 to 0.018 inches; and (g) a lower planar surface parallel to the planar land surface and adjoining and extending from the second curved surface thereby forming one continuous surface within the insert cutting edge.
Claim 3
Dependent Claim
17 words
The cutting insert of claim 1 wherein the planar land surface perpendicularly intersects the peripheral wall surface.
Claim 4
Dependent Claim
22 words
The cutting insert of claim 2 wherein the planar land surface is from 0.003 to 0.015 inches above the lower planar surface.
Claim 5
Dependent Claim
22 words
The cutting insert of claim 2 wherein the radius of the first curved surface equals the radius of the second curved surface.
Claim 6
Dependent Claim
27 words
The cutting insert of claim 3 wherein the inner wall surface descends at an angle of from 6° to 30° from the plane of the land surface.
Claim 7
Dependent Claim
25 words
The cutting insert of claim 1 wherein the planar land surface intersects the peripheral wall surface at an angle of from about 75° to 84°.
Claim 8
Dependent Claim
59 words
The cutting insert of claim 1 further comprising: (h) a third curved surface having a radius of from 0.006 to 0.018 ascending from the lower planar surface; and (i) a rear wall surface adjoining the third curved surface and ascending inwardly of the peripheral wall surface at an angle of about 150° to 174° from the lower planar surface.
References Cited (Backward Citations)
US3137917A
Cited
US3187406A
Cited
FR1517204A
Cited
US3733664A
Cited
US3947937A
Cited
US3973307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |