US3576090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive disc and method of making it
Assignee: Dresser Industries Inc
•
Filing: 1967-09-28
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Granted: 1971-04-27
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Expires: 1987-09-28
Abstract
Abstract A reinforced abrasive disc and method for making it wherein the reinforcing member is placed at the junction between the usable and nonusable layers of abrasive material, the reinforcing member being independent and spaced apart from the anchor nuts embedded in the nonusable layer of abrasive material which are used to secure the disc to a rotatable support wheel.
Inventors
- 👤 Frank O Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:10
CPC Classifications
B; B24; B24D; B24D7/00; B24D7/02; B24D7/04; B24D18/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
59 words
A reinforced abrasive disc adapted to be attached to a rotatable supporting wheel comprising, a first layer of material, a second layer of abrasive material, attachment means embedded solely in said first layer adapted to attach said abrasive disc to a supporting wheel, and an unstressed reinforcing member at the junction of said first and second layers of material.
Claim 2
Dependent Claim
59 words
A reinforced abrasive disc adapted to be attached to a rotatable supporting wheel comprising, a first layer of material, a second layer of abrasive material, attachment means embedded solely in said first layer adapted to attach said abrasive disc to a supporting wheel, and an unstressed reinforcing member at the junction of said first and second layers of material.
Claim 3
Dependent Claim
21 words
A reinforcing abrasive disc as claimed in claim 1 in which said attachment means are also independent of said reinforcing member.
Claim 4
Dependent Claim
85 words
The method of claim 6 in which said first layer is formed by: placing a plurality of anchor means in a predetermined arrangement on a molding plate, spreading a layer of material around and above said anchor means, placing a reinforcing member over said layer of material, compressing said layer of material to a formulated density with a pressure plate acting against said reinforcing member whereby said reinforcing member is directly supported by said pressure plate during such compression and is thus protected against distortion.
Claim 5
Dependent Claim
26 words
The reinforcing abrasive disc of claim 1 in which said first layer is a nonusable layer having a greater density than that of said second layer.
Claim 6
Independent Claim
100 words
A method of making a reinforced abrasive disc comprising the steps of; forming a first layer of material having a plurality of attachment means embedded therein, and having an unstressed reinforcing member attached to one side thereof; joining a second layer of abrasive material to said reinforcing member and said first layer by: adding a layer of abrasive material over said reinforcing member; compressing said added layer of abrasive material to a density no greater than the density of said first layer so that said reinforcing member is not distorted during said joining step; and curing said reinforced abrasive disc.
Claim 7
Independent Claim
100 words
A method of making a reinforced abrasive disc comprising the steps of; forming a first layer of material having a plurality of attachment means embedded therein, and having an unstressed reinforcing member attached to one side thereof; joining a second layer of abrasive material to said reinforcing member and said first layer by: adding a layer of abrasive material over said reinforcing member; compressing said added layer of abrasive material to a density no greater than the density of said first layer so that said reinforcing member is not distorted during said joining step; and curing said reinforced abrasive disc.
References Cited (Backward Citations)
US1812076A
Cited
GB388034A
Cited
US2279278A
Cited
US2624986A
Cited
US2926469A
Cited
US3250045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |