US3792515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-faced cutting insert
Assignee: Sandvik AB
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Filing: 1972-10-18
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Granted: 1974-02-19
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Expires: 1992-10-18
Abstract
Abstract The cutting insert of the invention is characterized in that the cutting edge and the associated chip-breaker describe a curve composed of straight and/or arched parts in the plane of the clearance - or side face. The chip-breaker,- which can have one or more steps,- is so formed that its back or inner boundary or edge connects with a central part of the cutting insert. An important feature of the new cutting insert consists in that its chipbreaker has constant width and constant depth in relation to the cutting edge.
Inventors
- 👤 E Lundgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:00
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; B23B2200/00; B23B2200/20; B23B2200/202; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/24; Y10T407/245
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
180 words
Cutting insert of regular polygonal form having broad top and bottom surfaces with interconnecting side faces and having at least one cutting edge (13) at the intersection of one of said faces with said broad top surface, said cutting edge being provided with a chipbreaker in the form of a groove (11) in said broad side or chip face of the insert, said groove extending along the cutting edge, the inner or back boundary (14) or edge of the chipbreaker connecting with a central region (12) on the plane surface of the face of the insert, in which cutting insert the cutting edge with connecting chipbreaker describes a curve composed of straight and/or arched parts (15, 16, 20, 21) in the plane of the clearance or side face, the chipbreaker having principally constant depth and width in relation to the cutting edge, and said central region (12) being so shaped that its intersection with the inner edge (14) of the chipbreaker follows the form of the cutting edge and has a certain constant level in relation to the cutting edge.
Claim 2
Dependent Claim
180 words
Cutting insert of regular polygonal form having broad top and bottom surfaces with interconnecting side faces and having at least one cutting edge (13) at the intersection of one of said faces with said broad top surface, said cutting edge being provided with a chipbreaker in the form of a groove (11) in said broad side or chip face of the insert, said groove extending along the cutting edge, the inner or back boundary (14) or edge of the chipbreaker connecting with a central region (12) on the plane surface of the face of the insert, in which cutting insert the cutting edge with connecting chipbreaker describes a curve composed of straight and/or arched parts (15, 16, 20, 21) in the plane of the clearance or side face, the chipbreaker having principally constant depth and width in relation to the cutting edge, and said central region (12) being so shaped that its intersection with the inner edge (14) of the chipbreaker follows the form of the cutting edge and has a certain constant level in relation to the cutting edge.
Claim 3
Dependent Claim
32 words
Cutting insert according to claim 1, wherein the cutting edge and connecting chipbreaker consist of concave parts (15) next to the corner radii of the insert and an interjacent convex part (16).
Claim 4
Dependent Claim
33 words
Cutting insert according to claim 1, wherein the cutting edge and connecting chip face consist of concave parts (15) next to the corner radii of the insert and an interjacent plain part (20).
Claim 5
Dependent Claim
18 words
Cutting insert according to claim 1, wherein the outer portion (21) of the concave parts (15) is straight.
Claim 6
Dependent Claim
32 words
Cutting insert according to claim 1, wherein the downward part (15) of the cutting edge starts at some distance (23) into the cutting edge as seen from the corner of the insert.
Claim 7
Dependent Claim
25 words
Cutting insert according to claim 1, wherein the profile of the chipbreaker perpendicular to the cutting edge is shaped with at least one convex part.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |