US5261818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-fluted dental irrigation drill
Assignee: Individual
•
Filing: 1992-07-13
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Granted: 1993-11-16
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Expires: 2012-07-13
Abstract
Abstract A dental drill exhibits the form of a substantially solid cylindrical body having a cutting portion and a gripping shank. The cylindrical body includes a boss between the cutting portion and said gripping shank. Upon the cutting portion, between the boss and a tip of the cutting portion, are provided at least four axi-symmetric flutes upon a lateral surface of the cutting portion. Each of the flutes are substantially co-axial with the longitudinal axis of the drill, defining a substantially linear profile before reaching the conical tip of the cutting portion, at which each of the flutes narrows. The flutes are separated by substantially co-axial channels having radial depths of about one-eighth of the diameter of the cylindrical body. Each of the channels flare to a larger polar dimension at said tip of the cutting portion. The body is provided with an axial irrigation channel having at least one liquid outlet within each of the channels and proximally to the tip of the cutting portion of the drill. The improved drill affords superior control to the dentist and decrease trauma to the patient.
Inventors
- 👤 Leon Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:37
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/02; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1673; A61C8/00; A61C8/0089
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
129 words
A dental drill in the form of a substantially solid cylindrical body having a gripping shank, the drill comprising: (a) an annular boss located between said cutting portion and said gripping shank; and (b) a cutting portion including at least four axi-symmetric flutes formed upon a lateral surface thereof, each of said flutes defining substantially co-axial peripheral profiles, each of said flutes separated by substantially co-axial channels, said cylindrical body having an irrigation channel extending the entire length thereof and having at least one outlet within each of said channels, said one outlet of each channel located proximally to a substantially conical tip of said cutting portion, said tip comprising a surface formed integrally and continuously with ends of said flutes and channels located remotely from said annular boss.
Claim 2
Dependent Claim
129 words
A dental drill in the form of a substantially solid cylindrical body having a gripping shank, the drill comprising: (a) an annular boss located between said cutting portion and said gripping shank; and (b) a cutting portion including at least four axi-symmetric flutes formed upon a lateral surface thereof, each of said flutes defining substantially co-axial peripheral profiles, each of said flutes separated by substantially co-axial channels, said cylindrical body having an irrigation channel extending the entire length thereof and having at least one outlet within each of said channels, said one outlet of each channel located proximally to a substantially conical tip of said cutting portion, said tip comprising a surface formed integrally and continuously with ends of said flutes and channels located remotely from said annular boss.
Claim 3
Dependent Claim
19 words
The dental drill as recited in claim 1 in which said at least four flutes comprises exactly four flutes.
Claim 4
Dependent Claim
36 words
The dental drill as recited in claim 1 in which said co-axial channels between said flutes define a radial depth of between one-tenth and one-quarter of the diameter of the cutting portion of the cylindrical body.
Claim 5
Dependent Claim
23 words
The dental drill as recited in claim 3, in which the diameter of said cylindrical body is about 2 to about 7 millimeters.
Claim 6
Dependent Claim
33 words
The dental drill as recited in claim 3 in which, proximally to said tip of said cutting portion the polar dimension of said channels increases as the polar dimension of said flutes decreases.
Claim 7
Dependent Claim
25 words
The dental drill as recited in claim 5, in which said irrigation channel possesses alternately two outlets and one outlet at polarly successive co-axial channels.
Claim 8
Dependent Claim
43 words
The dental drill as recited in claim 5, in which said cutting portion of said cylindrical body, between said conical tip and said boss, includes a plurality of equally axially displaced serrations, whereby sensing of depth of cutting penetration can be assisted thereby.
Claim 9
Dependent Claim
36 words
The dental drill as recited in claim 7, in which said serrations begin at a distance of about eight millimeters from said tip and continue at intervals of about two millimeters until reaching said annular boss.
Claim 10
Dependent Claim
33 words
The dental drill as recited in claim 5 in which said shank comprises an element manufactured apart from said cutting portion in which a fluid-tight seal defines a permanent press-fit complemental contact therebetween.
Claim 11
Dependent Claim
24 words
The dental drill as recited in claim 1, in which said irrigation channel possesses alternately two outlets and one outlet at polarly successive channels.
Claim 12
Dependent Claim
42 words
The dental drill as recited in claim 1, in which said cutting portion of said cylindrical body, between said conical tip and said boss, includes a plurality of equally axially displaced serrations, whereby sensing of depth of cutting penetration is assisted thereby.
Claim 13
Dependent Claim
36 words
The dental drill as recited in claim 11 in which said serrations begin at a distance of about eight millimeters from said tip and continue at intervals of about two millimeters until reaching said annular boss.
Claim 14
Dependent Claim
24 words
The dental drill as recited in claim 12 in which the total length of said solid cylindrical body is about 20 to 25 millimeters.
Claim 15
Dependent Claim
36 words
The dental drill as recited in claim 12 in which said co-axial channels between said flutes define a radial depth of between one-tenth and one-quarter of the diameter of the cutting portion of the cylindrical body.
Claim 16
Dependent Claim
23 words
The dental drill as recited in claim 14, in which the diameter of said cylindrical body is about 2 to about 7 millimeters.
Claim 17
Dependent Claim
25 words
The dental drill as recited in claim 14, in which said irrigation channel possesses alternately two outlets and one outlet at polarly successive co-axial channels.
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) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |