Patent US4159884A successfully refreshed from Google Patents.
US4159884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting tool
Assignee: Individual
•
Filing: 1977-08-19
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Granted: 1979-07-03
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Expires: 1997-08-19
Abstract
Abstract A cutting tool, preferably in the form of a cutting insert of hard material, having a narrow land area or ledge along the cutting edge, forming a shallow recessed groove promoting the formation of a false cutting tip build-up during use of the cutting tool, the cutting tip build-up resulting from the transfer of material from the chip to the ledge surface. The invention further contemplates favoring the formation of cutting tip build-up by providing a plurality of diamond particles embedded in the ledge surface at least at the cutting tip of the tool.
Inventors
- 👤 Lawrence A. Schott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:00
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; B23B27/148; B23B2200/00; B23B2200/08; B23B2200/085; B23B2200/20; B23B2200/201; B23B2226/00; B23B2226/31; B23B2228/00; B23B2228/10; Y; Y10; Y10T; Y10T407/00; Y10T407/23
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
118 words
In a cutting tool comprising a plate of a single hard material having a bottom surface, a top surface and a peripheral surface whereby said peripheral surface and at least said top surface forms a cutting edge at their junction defining at least one cutting tip, the improvement of a perimetric shallow groove in at least said top surface, said perimetric shallow groove having an edge disposed at said cutting edge and extending radially from said cutting edge at least at said cutting tip for promoting the formation of a false cutting tip build-up during use of said cutting tool, said perimetric shallow groove having a rough surface providing an anchoring surface for said false cutting tip build-up.
Claim 2
Dependent Claim
118 words
In a cutting tool comprising a plate of a single hard material having a bottom surface, a top surface and a peripheral surface whereby said peripheral surface and at least said top surface forms a cutting edge at their junction defining at least one cutting tip, the improvement of a perimetric shallow groove in at least said top surface, said perimetric shallow groove having an edge disposed at said cutting edge and extending radially from said cutting edge at least at said cutting tip for promoting the formation of a false cutting tip build-up during use of said cutting tool, said perimetric shallow groove having a rough surface providing an anchoring surface for said false cutting tip build-up.
Claim 3
Dependent Claim
18 words
The cutting tool of claim 1 wherein both said top and bottom surfaces are provided with said groove.
Claim 4
Dependent Claim
17 words
The cutting tool of claim 1 wherein said perimetric groove is in the form of a V-groove.
Claim 5
Dependent Claim
32 words
The cutting tool of claim 3 wherein at least the surface of said perimetric groove at the cutting tip of said tool has a plurality of diamond particles embedded in said surface.
Claim 6
Dependent Claim
15 words
The cutting tool of claim 1 wherein said perimetric groove is curvilinear in radial section.
Claim 7
Dependent Claim
32 words
The cutting tool of claim 4 wherein at least the surface of said perimetric groove at the cutting tip of said tool has a plurality of diamond particles embedded in said surface.
Claim 8
Dependent Claim
32 words
The cutting tool of claim 1 wherein at least the surface of said perimetric groove at the cutting tip of said tool has a plurality of diamond particles embedded in said surface.
Claim 9
Dependent Claim
39 words
The cutting tool of claim 1 wherein at least said top surface has a portion of said cutting tip disposed at an angle greater than 90° with said peripheral surface, and said portion is provided with said perimetric groove.
Claim 10
Dependent Claim
17 words
The cutting tool of claim 8 wherein said perimetric groove is in the form of a V-groove.
Claim 11
Dependent Claim
32 words
The cutting tool of claim 9 wherein at least the surface of said perimetric groove at the cutting tip of said tool has a plurality of diamond particles embedded in said surface.
Claim 12
Dependent Claim
15 words
The cutting tool of claim 9 wherein said perimetric groove is curvilinear in radial section.
Claim 13
Dependent Claim
32 words
The cutting tool of claim 11 wherein at least the surface of said perimetric groove at the cutting tip of said tool has a plurality of diamond particles embedded in said surface.
Claim 14
Dependent Claim
32 words
The cutting tool of claim 8 wherein at least the surface of said perimetric groove at the cutting tip of said tool has a plurality of diamond particles embedded in said surface.
Claim 15
Dependent Claim
58 words
In a cutting tool having a cutting edge for removing a chip from a workpiece, a false cutting edge retaining portion extending from said cutting edge, said portion being relatively narrow and having a relatively rough surface providing an anchoring surface for said false cutting tip formed by transfer of material from the chip removed from the workpiece.
Claim 16
Dependent Claim
58 words
In a cutting tool having a cutting edge for removing a chip from a workpiece, a false cutting edge retaining portion extending from said cutting edge, said portion being relatively narrow and having a relatively rough surface providing an anchoring surface for said false cutting tip formed by transfer of material from the chip removed from the workpiece.
Claim 17
Dependent Claim
14 words
The cutting tool of claim 14 wherein said surface is disposed in a groove.
Claim 18
Dependent Claim
17 words
The cutting tool of claim 14 wherein said surface has a plurality of diamond particles embedded therein.
Claim 19
Dependent Claim
17 words
The cutting tool of claim 15 wherein said surface has a plurality of diamond particles embedded therein.
References Cited (Backward Citations)
US3369283A
Cited
US3381349A
Cited
US3344496A
Cited
US3399442A
Cited
US3850053A
Cited
US3947937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |