Patent EP0044701A1 successfully refreshed from Google Patents.
EP0044701A1
Expired / Lapsed
EP
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Dental abrasive disk
Assignee: 3M Co
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Filing: 1981-07-15
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Granted: —
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Expires: 2001-07-15
Abstract
Abstract Dental mandrels, circular in cross-section, and detachable abrasive disks useful in confined areas of the mouth, in which the disk (14) can be mounted on and demounted from the mandrel (12) using finger pressure, and the disk (14) can optionally be rotated relative to the mandrel (12) when the mandrel is at rest, but the disk (14) is gripped sufficiently firmly when the mandrel (12) is spinning that no slippage of the disk (14) is apparent under dental grinding conditions. The working end of the mandrel (12) has a knob-like terminal portion (26) of circular shape in cross-section with a maximum diameter equal to or greater than the diameter of the circular hole in the grommet (16) of the disk (14), a shoulder (22) for the grommet (16) and means for providing static disengagement and dynamic driving engagement between the knob-like terminal portion (26) and the grommet (16).
Inventors
- 👤 Robert D. Dube
- 👤 Lawrence A. May
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 08:16
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
166 words
An abrading device, comprising a circular abrasive disk, said disk having a central aperture and a grommet through said aperture, said grommet being firmly attached to said disk, and a rod-like mandrel having a driving end and a working end, said driving end being adapted to be mounted in a powered dental tool, characterized in that said grommet has a circular hole whose axis is essentially perpendicular to said disk and said working end has: (i) a knob-like terminal portion having in axial cross-section a circular shape with a maximum diameter equal to or greater than the diameter of said circular hole in said grommet; (ii) a shoulder between said knob-like terminal portion and said driving end, said shoulder having in axial cross-section a minimum diameter greater than the diameter of said circular hole in said grommet; and (iii) means for providing static disengagement and dynamic driving engagement between said knob-like terminal portion and said grommet when said grommet is positioned around said knob-like terminal portion.
Claim 2
Dependent Claim
166 words
An abrading device, comprising a circular abrasive disk, said disk having a central aperture and a grommet through said aperture, said grommet being firmly attached to said disk, and a rod-like mandrel having a driving end and a working end, said driving end being adapted to be mounted in a powered dental tool, characterized in that said grommet has a circular hole whose axis is essentially perpendicular to said disk and said working end has: (i) a knob-like terminal portion having in axial cross-section a circular shape with a maximum diameter equal to or greater than the diameter of said circular hole in said grommet; (ii) a shoulder between said knob-like terminal portion and said driving end, said shoulder having in axial cross-section a minimum diameter greater than the diameter of said circular hole in said grommet; and (iii) means for providing static disengagement and dynamic driving engagement between said knob-like terminal portion and said grommet when said grommet is positioned around said knob-like terminal portion.
Claim 3
Dependent Claim
15 words
An abrading device according to Claim 1, further characterized in that said grommet comprises brass.
Claim 4
Dependent Claim
51 words
. 3. An abrading device according to any preceeding claim, further characterized in that said mandrel has.a split arbor at said working end formed by one or more slots in said working end, with said slots extending from said working end toward said driving end, to a depth beyond said shoulder.
Claim 5
Dependent Claim
58 words
4 . An abrading device according to any preceeding claim, further characterized in that said knob-like terminal portion has a generally frustum-like shape with a smaller cross-sectional diameter proximate said shoulder, generally greater cross-sectional diameter proximate said working end, and is beveled proximate said working end to provide a non-aggressive surface at the working end of said mandrel.
Claim 6
Dependent Claim
29 words
An abrading device according to any preceeding claim, further characterized in that there is.an interference fit of 25 to 50 micrometers between said grommet and said knob-like terminal portion.
Claim 7
Dependent Claim
51 words
A dental abrasive disk having a central aperture and a grommet through said aperture, said grommet being firmly attached to said disk, characterized in that said grommet has a circular hole whose axis is essentially perpendicular to said disk and said disk has utility in the abrading device of Claim 1.
Claim 8
Dependent Claim
23 words
A dental abrasive disk according to Claim 6, further characterized in that said disk has a diameter between 6 mm and 22 mm.
Claim 9
Dependent Claim
19 words
A dental abrasive disk according to Claim 7, further characterized in that said diameter is legs than 13 mm.
Claim 10
Dependent Claim
26 words
A dental abrasive disk according to Claim 6, further characterized in that said disk comprises rubber or phenolic, said rubber or phenolic being impregnated with abrasive.
Claim 11
Dependent Claim
73 words
A dental abrasive disk comprising a flexible backing, binder, and abrasive, said disk having a central aperture and a brass grommet through said aperture and firmly attached to said disk, characterized in that said aperture in said grommet is a circular central hole whose axis is essentially perpendicular to said disk, said disk has a diameter between 6 and 22 mm, and said disk has utility in the abrading device of Claim 1.
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