US4264246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring tool for boring holes of substantial length
Assignee: W.HEGENSCHEIDT GmbH
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Filing: 1979-06-25
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Granted: 1981-04-28
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Expires: 1999-06-25
Abstract
Abstract The present boring head is constructed for drilling or boring deep holes or bores of substantial axial length whereby so-called veering off from the longitudinal boring axis is to be prevented. For this purpose three cutting members are distributed about the circumference of a base in such a manner that the cutting members are located at 0°, 95°, and 190° with a position tolerance of ±5° for each cutting member relative to a polar coordinate system. At least one guide rod is arranged at an angle of 55° and another guide rod is located at an angle of 305°. Each guide rod position may have a tolerance of ±10° in said polar coordinate system.
Inventors
- 👤 Clemens Lowis
- 👤 Garrj Berstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:44
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03403; B23B29/03421; B23B51/00; B23B51/04; Y; Y10; Y10S; Y10S408/00; Y10S408/705; Y10T; Y10T408/00; Y10T408/55; Y10T408/557; Y10T408/558; Y10T408/5583
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
171 words
A boring head for drilling holes of substantial axial length, comprising base means having a central longitudinal axis, first, second, and third cutting members operatively secured to said base means, a plurality of guide rod means operatively secured to said base means, said first cutting member being secured to said base means at a first position defined by 0°±5° in a polar coordinate system the origin of which coincides with said central longitudinal axis, said second cutting member being located at a second position defined by 95°±5°, said third cutting member being located at a third location defined by 190°±5°, said guide rod means comprising at least one guide rod located at an angle of 55°±10°, and another guide rod located at an angle of 305°±10°, whereby said first, second and third cutting members are arranged substantially symmetrically relative to one another but non-symmetrically relative to the 360° of said polar coordinate system, and whereby said guide rods are also arranged non-symmetrical relative to the 360° of said polar coordinate system.
Claim 2
Dependent Claim
171 words
A boring head for drilling holes of substantial axial length, comprising base means having a central longitudinal axis, first, second, and third cutting members operatively secured to said base means, a plurality of guide rod means operatively secured to said base means, said first cutting member being secured to said base means at a first position defined by 0°±5° in a polar coordinate system the origin of which coincides with said central longitudinal axis, said second cutting member being located at a second position defined by 95°±5°, said third cutting member being located at a third location defined by 190°±5°, said guide rod means comprising at least one guide rod located at an angle of 55°±10°, and another guide rod located at an angle of 305°±10°, whereby said first, second and third cutting members are arranged substantially symmetrically relative to one another but non-symmetrically relative to the 360° of said polar coordinate system, and whereby said guide rods are also arranged non-symmetrical relative to the 360° of said polar coordinate system.
Claim 3
Dependent Claim
33 words
The boring head of claim 1, wherein said guide rod means comprise a third guide rod located at an angle of 140°±10° and a fourth guide rod located at an angle of 235°±10°.
References Cited (Backward Citations)
US4133399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |