Patent US4178689A successfully refreshed from Google Patents.
US4178689A
Expired / Lapsed
US
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Dental burr
Assignee: DEN-TAL-EZ DENTAL PRODUCTS CORP A CORP OF PA
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Filing: 1977-08-10
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Granted: 1979-12-18
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Expires: 1997-08-10
Abstract
Abstract This application describes a dental burr including a cutting surface having one or more grooves therein, each of the grooves being defined by a plane which encircles the cutting surface at a skewed angle with respect to the axis of rotation of the burr. Such groove(s) provide an oscillatory chip clearing action as the burr rotates to give edge cutting and fast chip clearance. The cutting surface has abrasive particles coated thereon.
Inventors
- 👤 John E. Nash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:30
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A one-piece dental burr comprising a shank terminating, at the operative end thereof, in a cutting surface devoid of teeth-like projections, said cutting surface having only one groove therein, said groove being the only groove in said cutting surface, said groove being defined by a plane which encircles said cutting surface at a skewed angle with respect to the axis of rotation of said burr, said groove only partially encircling said cutting surface and having curved side walls, said groove providing an oscillatory chip clearing action as the burr is rotated to thereby afford fast chip clearance.
Claim 2
Dependent Claim
97 words
A one-piece dental burr comprising a shank terminating, at the operative end thereof, in a cutting surface devoid of teeth-like projections, said cutting surface having only one groove therein, said groove being the only groove in said cutting surface, said groove being defined by a plane which encircles said cutting surface at a skewed angle with respect to the axis of rotation of said burr, said groove only partially encircling said cutting surface and having curved side walls, said groove providing an oscillatory chip clearing action as the burr is rotated to thereby afford fast chip clearance.
Claim 3
Dependent Claim
14 words
The burr of claim 1 wherein said cutting surface has abrasive particles coated thereon.
Claim 4
Dependent Claim
127 words
A one-piece dental burr comprising a shank terminating, at the operative end thereof, in a cutting surface devoid of teeth-like projections, said cutting surface having a plurality of non-intersecting grooves therein, said non-intersecting grooves being the only grooves in said cutting surface, each of said non-intersecting grooves being defined by a plane which encircles said cutting surface at a skewed angle with respect to the axis of rotation of said burr, each of said planes being parallel to each of the other said planes, at least one of said non-intersecting grooves only partially encircling said cutting surface, at least one of said non-intersecting grooves having curved side walls, said grooves providing an oscillatory chip clearing action as the burr is rotated to thereby afford fast chip clearance.
Claim 5
Dependent Claim
127 words
A one-piece dental burr comprising a shank terminating, at the operative end thereof, in a cutting surface devoid of teeth-like projections, said cutting surface having a plurality of non-intersecting grooves therein, said non-intersecting grooves being the only grooves in said cutting surface, each of said non-intersecting grooves being defined by a plane which encircles said cutting surface at a skewed angle with respect to the axis of rotation of said burr, each of said planes being parallel to each of the other said planes, at least one of said non-intersecting grooves only partially encircling said cutting surface, at least one of said non-intersecting grooves having curved side walls, said grooves providing an oscillatory chip clearing action as the burr is rotated to thereby afford fast chip clearance.
Claim 6
Dependent Claim
12 words
The dental burr of claim 3 wherein there are two non-intersecting grooves.
Claim 7
Dependent Claim
14 words
The burr of claim 3 wherein said cutting surface has abrasive particles coated thereon.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |