US3815192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Throw away insert
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1973-02-15
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Granted: 1974-06-11
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Expires: 1993-02-15
Abstract
Abstract A polygonal throw away insert to be detachably mounted in a tool holder having a plurality of cutting edges on one major surface of the insert body along the edges of all the sides thereof and a plurality of projection rows provided on said major surface along and spaced from the cutting edges so as to form chip breakers. Adjacent projections in each projection row define chip curling zones therebetween.
Inventors
- 👤 Y Ohtsu
- 👤 S Nakatani
- 👤 H Fukura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:20
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; B23B2200/00; B23B2200/32; B23B2200/321; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/235; Y10T407/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
114 words
A polygonal throw away insert to be detachably mounted in a tool holder having opposite and parallel two major surfaces and a plurality of sides, said insert comprising a plurality of cutting edges on one of said major surfaces along the edges of all the sides of the insert body, a corresponding number of ramps which slope gradually and downwardly from said cutting edges toward the center of said insert body and a plurality of chip breaker projection rows each row including a plurality of chip breaker projections positioned on or adjacent the down-streams of said ramps in a spaced relationship to said cutting edges thereby to define chip curling zones between adjacent projections.
Claim 2
Dependent Claim
114 words
A polygonal throw away insert to be detachably mounted in a tool holder having opposite and parallel two major surfaces and a plurality of sides, said insert comprising a plurality of cutting edges on one of said major surfaces along the edges of all the sides of the insert body, a corresponding number of ramps which slope gradually and downwardly from said cutting edges toward the center of said insert body and a plurality of chip breaker projection rows each row including a plurality of chip breaker projections positioned on or adjacent the down-streams of said ramps in a spaced relationship to said cutting edges thereby to define chip curling zones between adjacent projections.
Claim 3
Dependent Claim
34 words
The polygonal throw away insert to be detachably mounted in a tool holder as set forth in claim 1, in which said rows of projections Are positioned in substantially parallel to adjacent cutting edges.
Claim 4
Dependent Claim
65 words
The polygonal throw away insert to be detachably mounted in a tool holder as set forth in claim 1, in which each of said rows of projections extends in a slightly curved line with the projections in the center of said line positioned nearer to the center of said insert body than the rest in the same line positioned with respect to the body center.
Claim 5
Dependent Claim
30 words
The polygonal throw away insert to be detachably mounted in a tool holder as set forth in claim 1, in which said ramps have the surface of a preselected curvature.
Claim 6
Dependent Claim
30 words
The polygonal throw away insert to be detachably mounted in a tool holder as set forth in claim 1, in which said ramps have the surface of a linear plane.
Claim 7
Dependent Claim
28 words
The polygonal throw away insert to be detachably mounted in a tool holder as set forth in claim 1, in which said insert body has a triangle configuration.
Claim 8
Dependent Claim
32 words
The polygonal throw away insert to be detachably mounted in a tool holder as set forth in claim 1, in which said projections have substantially the same height as said cutting edges.
Claim 9
Dependent Claim
33 words
The polygonal throw away insert to be detachably mounted in a tool holder as set forth in claim 1, in which said projections are in the form of a portion of a sphere.
Claim 10
Dependent Claim
40 words
The polygonal throw away insert to be detachably mounted in a tool holder as set forth in claim 1, in which the distance between two adjacent projections in each row is within the range of 2 mm to 4 mm.
Claim 11
Dependent Claim
43 words
The polygonal throw away insert to be detachably mounted in a tool holder as set forth in claim 1, in which each of said rows of projections is spaced from the adjacent cutting edge within the range of 1 mm to 3 mm.
References Cited (Backward Citations)
US2713714A
Cited
US3407467A
Cited
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 |