US3700346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring bar insert
Assignee: Komet Praezisionswerkzeuge Robert Breuning GmbH
•
Filing: 1971-02-01
•
Granted: 1972-10-24
•
Expires: 1991-02-01
Abstract
Abstract A boring bar insert having two counterwise movable boring tool carriers, the tools of which are arranged at oppositely actuated ends of the boring tool carriers when rotated through 180* to one another. For counterwise movement and adjustment of the boring tool carriers there is between their mutually facing shank ends an adjusting ring co-operating with two counterwise screwthreads of the boring tool carriers and a centering device. The boring tool holders are securely held and also can be moved counterwise in the clamped condition. Centering of the boring tool carriers with respect to the boring bar axis is possible.
Inventors
- 👤 Otto Eckle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:05
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03403; B23B29/03407; B23B29/0341; Y; Y10; Y10T; Y10T408/00; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8588; Y10T408/85892; Y10T408/85893; Y10T408/8598; Y10T408/85995
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
236 words
Boring bar insert having a housing insertable into a recess of the boring bar, which housing has a boring tool carrier which is supported movably in a longitudinal bore in said housing and has at the front end thereof the boring tool and at the rear end thereof a screw threaded stud, an adjusting nut cooperating with said screw threaded stud and being nonmovably supported in the rear portion of the longitudinal bore and a clamping device between said housing and said boring tool carrier, the improvement comprising wherein: a. the nut has a collar which is supported rearwardly on a shoulder of the longitudinal bore by a first axial bearing, b. the boring tool carrier is guided nonrotatably on its shank in a cylindrical collet chuck sleeve which has a cone at its front end, c. the collet chuck sleeve is secured against rotation and is arranged movably in the longitudinal bore, d. a screw threaded ring having an internal cone is screwed in at the front end of the longitudinal bore, which screw threaded ring cooperates with its internal cone with the cone of the collet chuck sleeve, and e. a second axial bearing is provided between the rear end of the collet chuck sleeve and the collar of the nut on which axial bearing the collet chuck sleeve is supported under the effect of the axial force caused by the screw threaded ring.
Claim 2
Dependent Claim
236 words
Boring bar insert having a housing insertable into a recess of the boring bar, which housing has a boring tool carrier which is supported movably in a longitudinal bore in said housing and has at the front end thereof the boring tool and at the rear end thereof a screw threaded stud, an adjusting nut cooperating with said screw threaded stud and being nonmovably supported in the rear portion of the longitudinal bore and a clamping device between said housing and said boring tool carrier, the improvement comprising wherein: a. the nut has a collar which is supported rearwardly on a shoulder of the longitudinal bore by a first axial bearing, b. the boring tool carrier is guided nonrotatably on its shank in a cylindrical collet chuck sleeve which has a cone at its front end, c. the collet chuck sleeve is secured against rotation and is arranged movably in the longitudinal bore, d. a screw threaded ring having an internal cone is screwed in at the front end of the longitudinal bore, which screw threaded ring cooperates with its internal cone with the cone of the collet chuck sleeve, and e. a second axial bearing is provided between the rear end of the collet chuck sleeve and the collar of the nut on which axial bearing the collet chuck sleeve is supported under the effect of the axial force caused by the screw threaded ring.
Claim 3
Dependent Claim
44 words
Boring bar insert according to claim 1, wherein the axial bearings are constructed as antifriction bearings, and a bearing ring is provided respectively between the rear end of the collet chuck sleeve and the antifriction elements, and between the shoulder and the antifriction elements.
Claim 4
Dependent Claim
32 words
Boring bar insert according to claim 2, wherein each bearing ring partly embraces the antifriction elements from the outside and is secured to the nut by a spring ring preventing axial displacement.
References Cited (Backward Citations)
US2826943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |