US3672060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental instrument
Assignee: Kaltenbach and Voigt GmbH
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Filing: 1969-07-17
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Granted: 1972-06-27
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Expires: 1989-07-17
Abstract
Abstract The invention relates to dental instruments of the type having a tool-receiving hollow shank. A tool clamping sleeve is provided in the shank, the sleeve being radially expansible in at least one area thereof on insertion of a tool shank therein. Annular spaces are provided between the sleeve and the shank and, in some instances, between the sleeve and the tool shank, to permit such expansion with effective clamping action.
Inventors
- 👤 Eugen Eibofner
- 👤 Willi Fink
- 👤 Gerhard Farian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:42
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/08; A61C1/14; A61C1/141
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
165 words
A chuck device adapted to hold for rotation a dental tool and having a tool-receiving hollow shank, said shank having a toolexternal end and an end remote therefrom, a tool clamping sleeve of elastic material fixed within said shank, said sleeve having at least one external circumferential surface area of less diameter than the internal diameter of the confronting surface area of said shank and at least one internal circumferential surface area (a) of diameter smaller with relation to the remaining internal circumferential surface thereof, (b) smaller than the diameter of an inserted tool and (c) of greater thickness than in said external circumferential surface area extending axially beyond said internal circumferential surface area to provide annular spaces formed by said surface areas into which said sleeve may expand in response to tool-applied pressure, said surface areas of said sleeve are in axially overlapping relation with said internal circumferential surface area being positioned axially wholely within the axial length of said external circumferential surface area.
Claim 2
Dependent Claim
165 words
A chuck device adapted to hold for rotation a dental tool and having a tool-receiving hollow shank, said shank having a toolexternal end and an end remote therefrom, a tool clamping sleeve of elastic material fixed within said shank, said sleeve having at least one external circumferential surface area of less diameter than the internal diameter of the confronting surface area of said shank and at least one internal circumferential surface area (a) of diameter smaller with relation to the remaining internal circumferential surface thereof, (b) smaller than the diameter of an inserted tool and (c) of greater thickness than in said external circumferential surface area extending axially beyond said internal circumferential surface area to provide annular spaces formed by said surface areas into which said sleeve may expand in response to tool-applied pressure, said surface areas of said sleeve are in axially overlapping relation with said internal circumferential surface area being positioned axially wholely within the axial length of said external circumferential surface area.
Claim 3
Dependent Claim
38 words
A dental instrument as defined in claim 1, including driving means attached to said shank adjacent one end thereof, said internal surface area of said sleeve being located in radially opposite relation to said end of said shank.
Claim 4
Dependent Claim
30 words
A dental instrument as defined in claim 1, including a guide sleeve disposed within said shank at each said end, said clamping sleeve being disposed axially between said guide sleeves.
Claim 5
Dependent Claim
42 words
A dental instrument as defined in claim 3, said guide sleeve at said remote end having means for imparting rotary movement thereto, and means drivably connecting said remote end guide sleeve with said clamping sleeve for transmission of said rotary movement thereto.
Claim 6
Dependent Claim
24 words
A dental instrument as defined in claim 1, said clamping sleeve having a screw-threaded connection with said shank at said tool entrance end thereof.
Claim 7
Dependent Claim
42 words
A dental instrument as defined in claim 1, said clamping sleeve being formed of copper-beryllium alloy and having end portions, and a plurality of axially extending slots extending between and into said portions, said slots forming tool-clamping tongues in said clamping sleeve.
Claim 8
Dependent Claim
22 words
A dental instrument as defined in claim 6, the internal wall surface of each of said portions being of right cylindrical shape.
Claim 9
Dependent Claim
23 words
A dental instrument as defined in claim 6, each of said slots having end portions of greater width than the intermediate portions thereof.
References Cited (Backward Citations)
US3324553A
Cited
US3094338A
Cited
US3248138A
Cited
US3321209A
Cited
US3426429A
Cited
US3408043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |