Patent US4058898A successfully refreshed from Google Patents.
US4058898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental burr
Assignee: DEN-TAL-EZ DENTAL PRODUCTS CORP A CORP OF PA
•
Filing: 1976-03-19
•
Granted: 1977-11-22
•
Expires: 1996-03-19
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
2026-10-23 12:59
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A dental burr comprising a shank terminating, at the operative end thereof, in a cutting surface, 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 completely encircles said cutting surface at a skewed angle with respect to the axis of rotation of said burr, one of said planes defining one of said non-intersecting grooves being at an angle with respect to the plane defining another of said non-intersecting grooves.
Claim 2
Dependent Claim
92 words
A dental burr comprising a shank terminating, at the operative end thereof, in a cutting surface, 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 completely encircles said cutting surface at a skewed angle with respect to the axis of rotation of said burr, one of said planes defining one of said non-intersecting grooves being at an angle with respect to the plane defining another of said non-intersecting grooves.
Claim 3
Dependent Claim
47 words
The burr of claim 1 wherein each of said non-intersecting grooves has a pair of side walls which are at a skewed angle to the axis of rotation of said burr, said pair of said walls for each non-intersecting groove being flat and parallel to one another.
Claim 4
Dependent Claim
14 words
The burr of claim 1 wherein said cutting surface has abrasive particles coated thereon.
Claim 5
Dependent Claim
14 words
The burr of claim 1 wherein said cutting surface has two non-intersecting grooves therein.
Claim 6
Dependent Claim
17 words
The burr of claim 1 wherein at least one of said non-intersecting grooves has curved side walls.
Claim 7
Dependent Claim
17 words
The burr of claim 1 wherein at least one of said non-intersecting grooves has flat side walls.
Claim 8
Dependent Claim
14 words
The burr of claim 1 wherein all of said grooves have flat side walls.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |