US3815191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chip-forming cutting tool
Assignee: Santrade Ltd
•
Filing: 1972-07-03
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Granted: 1974-06-11
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Expires: 1992-07-03
Abstract
Abstract In a chip-forming machining operation improved results accrue from imparting to the chip - in the course of its formation - a longitudinally extending bulge or thickened portion which significantly stiffens the chip and desirably modifies its form. Locating the bulge adjacent the central part of the chip influences a ring-shaped form of chip, while locating the bulge adjacent an edge of the chip results in a cylindrical form of chip having a fairly constant radius of curvature and a great relatively constant pitch. The cutting tool which provides this stiffened chip has a groove or concavity at the locus where the thickened portion of the chip is desired.
Inventors
- 👤 J Holma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:16
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; B23B27/04; B23B27/045; B23B2200/00; B23B2200/32; B23B2200/323; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/235; Y10T407/24; Y10T407/245; Y10T407/25
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A chip forming cutting tool forming a chip having a longitudinally extending stiffened portion thereby decreasing from normal the radius of curvature of the chip, the tool having a top face and at least one clearance face, the intersection between said faces forming an elongated cutting edge, a chip breaker groove in said top face spaced from and running along said cutting edge, an additional groove in said top face running from said cutting edge to said chip breaker groove, said additional groove being spaced from an end of said elongated cutting edge.
Claim 2
Dependent Claim
93 words
A chip forming cutting tool forming a chip having a longitudinally extending stiffened portion thereby decreasing from normal the radius of curvature of the chip, the tool having a top face and at least one clearance face, the intersection between said faces forming an elongated cutting edge, a chip breaker groove in said top face spaced from and running along said cutting edge, an additional groove in said top face running from said cutting edge to said chip breaker groove, said additional groove being spaced from an end of said elongated cutting edge.
Claim 3
Dependent Claim
30 words
A chip forming cutting tool according to claim 1, wherein the intersection of the chip breaker groove with said top face closest to said cutting edge is substantially parallel thereto.
Claim 4
Dependent Claim
28 words
A chip forming cutting tool according to claim 1, wherein the depth and width of the chip breaker groove increases with increase of distance from said additional groove.
Claim 5
Dependent Claim
20 words
A chip forming cutting tool according to claim 1, wherein said additional groove is substantially perpendicular to said cutting edge.
Claim 6
Dependent Claim
41 words
A chip forming cutting tool according to claim 1, wherein the tool is a polygonal insert, each of whose sides is a cutting edge and each cutting edge is provided with a chip breaker groove and additional groove as set forth.
References Cited (Backward Citations)
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US2164303A
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US2211760A
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US2176265A
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US3395434A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |