US4055897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental abrading device and method
Assignee: 3M Co
•
Filing: 1976-03-11
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Granted: 1977-11-01
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Expires: 1996-03-11
Abstract
Abstract An abrading device comprising: A conformable elastomeric disc-shaped body having a thickness in the range of from about 0.15 to 0.4 millimeters and a Shore A hardness in the range of from about 50 to 75; wherein said body is adapted to be connected to a driving means; and An exposed abrasive layer supported on said elastomeric body; wherein said abrasive layer has thickness in the range of less than about 0.3 millimeters and wherein the diameter of said abrasive layer is from about 1 to 1.1 times the diameter of said elastomeric disc-shaped body.
Inventors
- 👤 Charles J. Brix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:10
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/14; A; A61; A61C; A61C3/00; A61C3/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
92 words
An abrading device comprising: a conformable elastomeric disc-shaped body having a thickness in the range of from about 0.15 to 0.4 millimeters and a Shore A hardness in the range of from about 50 to 75; wherein said body is adapted to be connected to a driving means; and an exposed abrasive layer supported on said elastomeric body; wherein said abrasive layer has a thickness less than about 0.3 millimeters and wherein the diameter of said abrasive layer is from about 1 to 1.1 times the diameter of said elastomeric disc-shaped body.
Claim 2
Dependent Claim
92 words
An abrading device comprising: a conformable elastomeric disc-shaped body having a thickness in the range of from about 0.15 to 0.4 millimeters and a Shore A hardness in the range of from about 50 to 75; wherein said body is adapted to be connected to a driving means; and an exposed abrasive layer supported on said elastomeric body; wherein said abrasive layer has a thickness less than about 0.3 millimeters and wherein the diameter of said abrasive layer is from about 1 to 1.1 times the diameter of said elastomeric disc-shaped body.
Claim 3
Dependent Claim
25 words
A device according to claim 1 wherein said elastomeric disc-shaped body has a Shore A hardness in the range of from about 60 to 65.
Claim 4
Dependent Claim
19 words
A device according to claim 2 wherein said abrasive layer comprises an abrasive material supported on a paper substrate.
Claim 5
Dependent Claim
13 words
A device according to claim 3 wherein said abrasive material is aluminum oxide.
Claim 6
Dependent Claim
18 words
A device according to claim 4 wherein said aluminum oxide has a maximum dimension of about 15 microns.
Claim 7
Dependent Claim
18 words
A device according to claim 4 wherein said aluminum oxide has a maximum dimension of about 25 microns.
Claim 8
Dependent Claim
18 words
A device according to claim 4 wherein said aluminum oxide has a maximum dimension of about 50 microns.
Claim 9
Dependent Claim
79 words
A device according to claim 5 wherein said elastomeric disc shaped body comprises a crosslinked polyurethane prepared by the polymerization of from about 8 to 10 parts by weight of a polyisocyanate having an isocyanate equivalent weight of from about 70 to 90 with from about 45 to 55 parts by weight of a polyoxyalkylene glycol having a number average molecular weight of from about 1000 to 2000 and a hydroxyl equivalent weight of from about 170 to 180.
Claim 10
Dependent Claim
38 words
A device according to claim 1 wherein said elastomeric disc-shaped body and said abrasive layer are adapted to be connected to a driving means by means of an opening through each, wherein said opening has a reinforced periphery.
Claim 11
Dependent Claim
15 words
A device according to claim 1 wherein said body is permanently connected to a mandrel.
Claim 12
Dependent Claim
91 words
An abrading device comprising: a conformable elastomeric disc shaped body having a thickness of from about 0.3 to 0.7 millimeters and a Shore A hardness in the range of from about 70 to 90, wherein said body is adapted to be connected to a driving means; and an exposed abrasive layer supported on said elastomeric body, wherein said abrasive layer has a thickness less than about 0.3 millimeters and wherein the diameter of said abrasive layer is from about 1.1 to 1.3 times the diameter of said elastomeric disc shaped body.
Claim 13
Dependent Claim
91 words
An abrading device comprising: a conformable elastomeric disc shaped body having a thickness of from about 0.3 to 0.7 millimeters and a Shore A hardness in the range of from about 70 to 90, wherein said body is adapted to be connected to a driving means; and an exposed abrasive layer supported on said elastomeric body, wherein said abrasive layer has a thickness less than about 0.3 millimeters and wherein the diameter of said abrasive layer is from about 1.1 to 1.3 times the diameter of said elastomeric disc shaped body.
Claim 14
Independent Claim
178 words
A method for polishing a dental composite restorative comprising the steps of: providing an abrading device comprising (a) a conformable elastomeric disc-shaped body having a thickness in the range of from about 0.15 to 0.4 millimeters and a Shore A hardness in the range of from about 50 to 75; wherein said body is adapted to be connected to a driving means; and (b) an exposed abrasive layer supported on said elastomeric body; wherein said abrasive layer has a thickness less than about 0.3 millimeters and wherein the diameter of said abrasive layer is from about 1 to 1.1 times the diameter of said elastomeric disc-shaped body; and driving said abrading device by a driving means; and contacting said dental restorative with the exposed abrasive layer of said driven abrading device with a maximum force normal to said dental restorative of about 6 grams per square millimeter for a time sufficient to polish said restorative, wherein said abrading device limits the maximum amount of the force applied normal to said restorative to about 6 grams per square millimeter.
Claim 15
Independent Claim
178 words
A method for polishing a dental composite restorative comprising the steps of: providing an abrading device comprising (a) a conformable elastomeric disc-shaped body having a thickness in the range of from about 0.15 to 0.4 millimeters and a Shore A hardness in the range of from about 50 to 75; wherein said body is adapted to be connected to a driving means; and (b) an exposed abrasive layer supported on said elastomeric body; wherein said abrasive layer has a thickness less than about 0.3 millimeters and wherein the diameter of said abrasive layer is from about 1 to 1.1 times the diameter of said elastomeric disc-shaped body; and driving said abrading device by a driving means; and contacting said dental restorative with the exposed abrasive layer of said driven abrading device with a maximum force normal to said dental restorative of about 6 grams per square millimeter for a time sufficient to polish said restorative, wherein said abrading device limits the maximum amount of the force applied normal to said restorative to about 6 grams per square millimeter.
Claim 16
Independent Claim
175 words
A method for polishing a dental composite restorative comprising the steps of: providing an abrading device comprising (a) a conformable elastomeric disc-shaped body having a thickness of from about 0.3 to 0.7 millimeters and a Shore A hardness in the range of from about 70 to 90, wherein said body is adapted to be connected to a driving means; and (b) an exposed abrasive layer supported on said elastomeric body, wherein said abrasive layer has a thickness less than about 0.3 millimeters and wherein the diameter of said abrasive layer is from about 1.1 to 1.3 times the diameter of said elastomeric disc-shaped body; and driving said abrading device by a driving means; and contacting said dental restorative with the exposed abrasive layer of said driven abrading device with a maximum force normal to said dental restorative of about 6 grams per square millimeter for a time sufficient to polish said restorative wherein said abrading device limits the maximum amount of the force applied normal to said restorative to about 6 grams per square millimeter.
Claim 17
Independent Claim
175 words
A method for polishing a dental composite restorative comprising the steps of: providing an abrading device comprising (a) a conformable elastomeric disc-shaped body having a thickness of from about 0.3 to 0.7 millimeters and a Shore A hardness in the range of from about 70 to 90, wherein said body is adapted to be connected to a driving means; and (b) an exposed abrasive layer supported on said elastomeric body, wherein said abrasive layer has a thickness less than about 0.3 millimeters and wherein the diameter of said abrasive layer is from about 1.1 to 1.3 times the diameter of said elastomeric disc-shaped body; and driving said abrading device by a driving means; and contacting said dental restorative with the exposed abrasive layer of said driven abrading device with a maximum force normal to said dental restorative of about 6 grams per square millimeter for a time sufficient to polish said restorative wherein said abrading device limits the maximum amount of the force applied normal to said restorative to about 6 grams per square millimeter.
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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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |