Patent US3791465A successfully refreshed from Google Patents.
US3791465A
Expired / Lapsed
US
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Boring tool
Assignee: UNION IND
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Filing: 1972-11-02
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Granted: 1974-02-12
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Expires: 1992-11-02
Abstract
Abstract Boring tool comprising a wheel in the form of a disk, formed by a substantially circular metal support provided at its periphery with elements made of a hard substance, said elements being plates arranged in a substantially contiguous configuration, the plane of said plates coinciding substantially with the plane of symmetry of said wheel perpendicular to the axis of rotation so as to produce a continuous crown.
Inventors
- 👤 E Metge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:04
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/1006; E21D9/104; E21B; E21B10/00; E21B10/08; E21B10/12; E21B10/46; E21B10/50; E21B10/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
In a boring tool comprising: a wheel in disk form consisting of a substantially circular metal support provided at the periphery with elements made of a hard substance, the improvement wherein: said elements comprise plates arranged in a substantially contiguous configuration with the plane of the said plates coinciding substantially with the plane of symmetry of the said wheel perpendicular to the axis of rotation, so as to form a continuous crown.
Claim 2
Dependent Claim
72 words
In a boring tool comprising: a wheel in disk form consisting of a substantially circular metal support provided at the periphery with elements made of a hard substance, the improvement wherein: said elements comprise plates arranged in a substantially contiguous configuration with the plane of the said plates coinciding substantially with the plane of symmetry of the said wheel perpendicular to the axis of rotation, so as to form a continuous crown.
Claim 3
Dependent Claim
37 words
The boring tool according to claim 1, wherein: said plates are fixed in a circular groove arranged in the plane of symmetry of the support, and wherein the support has the shape of a biconical circular ring.
Claim 4
Dependent Claim
23 words
The boring tool according to claim 1, wherein: the plates are made of one material of the group consisting of carbides and nitrides.
Claim 5
Dependent Claim
16 words
The boring tool according to claim 1, wherein the plates are made of a ceramic substance.
Claim 6
Dependent Claim
17 words
The boring tool according to claim 1 wherein: the plates are fixed to the support by brazing.
Claim 7
Dependent Claim
17 words
The boring tool according to claim 2 wherein: the plates are fixed to the support by brazing.
Claim 8
Dependent Claim
17 words
The boring tool according to claim 3, wherein: the plates are fixed to the support by brazing.
References Cited (Backward Citations)
US1516340A
Cited
US1691623A
Cited
US2121202A
Cited
US2223864A
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US2887302A
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US3191699A
Cited
US3596724A
Cited
US3679009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |