Patent US3751782A successfully refreshed from Google Patents.
US3751782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Throw away tips for metal cutting tools
Assignee: HERBERT A Ltd GB
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Filing: 1971-05-12
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Granted: 1973-08-14
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Expires: 1991-05-12
Abstract
Abstract A throw away tip for a metal cutting tool comprising a right prism of hard material, each end face of the prism having at least two identical cutting corners and being formed with a plurality of tapering recesses of V-shaped section each recess having its narrowest end adjacent one of said cutting corners of the associated end face.
Inventors
- 👤 H Fruish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:02
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/235
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A throw away tip for a metal cutting tool comprising a right prism of a hard material, each end face of the prism having at least two identical cutting corners and being formed with a plurality of tapering recesses of V-shaped section, each such recess having its narrow end adjacent one of said cutting corners of the associated end face and being spaced from the edge of such face so as to define a land extending completely around each end face.
Claim 2
Dependent Claim
81 words
A throw away tip for a metal cutting tool comprising a right prism of a hard material, each end face of the prism having at least two identical cutting corners and being formed with a plurality of tapering recesses of V-shaped section, each such recess having its narrow end adjacent one of said cutting corners of the associated end face and being spaced from the edge of such face so as to define a land extending completely around each end face.
Claim 3
Dependent Claim
38 words
A throw-away tip as claimed in claim 1 in which each recess has a pair of flank surfaces inclined to one another at an angle in the range 105* to 110* and equally inclined to the end face.
Claim 4
Dependent Claim
47 words
A throw-away tip as claimed in claim 2 in which said flank surfaces intersect the end face on two lines inclined to one another at an angle of 30*, one line being parallel to an edge of the end face, whereby a constant width land is provided.
Claim 5
Dependent Claim
22 words
A throw-away tiP as claimed in claim 3 which the prism is of square cross section and has eight identical cutting corners.
Claim 6
Dependent Claim
23 words
A throw-away tip as claimed in claim 3 in which the prism is of equilateral triangular cross-section and has six identical cutting corners.
Claim 7
Dependent Claim
22 words
A throw-away tip as claimed in claim 3 in which the prism is of rhombic cross-section and has four identical cutting corners.
Claim 8
Dependent Claim
27 words
A throw-away tip as claimed in claim 3 in which each recess is bounded at the end opposite the associated cutting corner by an inclined end face.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |