US4883501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina bonded abrasive for cast iron
Assignee: 3M Co
•
Filing: 1988-09-19
•
Granted: 1989-11-28
•
Expires: 2008-09-19
Abstract
Abstract This invention concerns the discovery that sol-gel process alumina abrasive grain provides superior performance in bonded abrasives for grinding cast iron. In a preferred form it is disclosed that bonded abrasives of sol-gel process alumina abrasives in combination with other abrasive grains such as those of silicon carbide and fused alumina also provide superior grinding of cast iron.
Inventors
- 👤 Douglas G. Haynes, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:19
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; B; B24; B24B; B24B1/00; B24D; B24D3/00; B24D3/34; B24D3/346; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/1115
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
22 words
A bonded abrasive in the form of a wheel comprising sol-gel alumina abrasive grain, fused alumina abrasive grain, and a binder material.
Claim 2
Dependent Claim
22 words
A bonded abrasive in the form of a wheel comprising sol-gel alumina abrasive grain, fused alumina abrasive grain, and a binder material.
Claim 3
Dependent Claim
12 words
The abrasive of claim 1 wherein said binder material comprises phenolic resin.
Claim 4
Dependent Claim
26 words
The abrasive of claim 1 wherein said sol-gel alumina comprises about 30 to about 70 weight percent of the total abrasive grain in said bonded abrasive.
Claim 5
Dependent Claim
23 words
The bonded abrasive of claim 1 wherein said sol-gel abrasive comprises about 90% by weight of the abrasive grain in said bonded abrasive.
Claim 6
Dependent Claim
22 words
The bonded abrasive of claim 4 wherein fused alumina comprises about 10% by weight of the abrasive grain in said bonded abrasive.
Claim 7
Dependent Claim
24 words
The bonded abrasive of claim 4 wherein said sol-gel abrasive is in a grain size of between about 4 grit and about 100 grit.
Claim 8
Dependent Claim
23 words
The bonded abrasive of claim 4 wherein said sol-gel abrasive is in a grain size of between about 10 and about 100 grit.
Claim 9
Dependent Claim
19 words
The bonded abrasive of claim 1 wherein said sol-gel abrasive comprises about 70% by weight of the abrasive grain.
Claim 10
Dependent Claim
77 words
A bonded abrasive comprising a blend of sol-gel alumina abrasive grain and fused alumina abrasive grain consolidated together with a binder material to form an abrasive wheel, said abrasive wheel having a grinding ratio of at least 108% of the grinding ratio of a comparable abrasive wheel containing fused alumina abrasive grain as the only abrasive grain and at least about equal to a comparable abrasive wheel containing sol-gel alumina abrasive grain as the only abrasive grain.
Claim 11
Dependent Claim
77 words
A bonded abrasive comprising a blend of sol-gel alumina abrasive grain and fused alumina abrasive grain consolidated together with a binder material to form an abrasive wheel, said abrasive wheel having a grinding ratio of at least 108% of the grinding ratio of a comparable abrasive wheel containing fused alumina abrasive grain as the only abrasive grain and at least about equal to a comparable abrasive wheel containing sol-gel alumina abrasive grain as the only abrasive grain.
Claim 12
Dependent Claim
78 words
A bonded abrasive comprising a blend of sol-gel alumina abrasive grain and fused alumina abrasive grain consolidated together with a binder material to form an abrasive wheel, said abrasive wheel having a grinding ratio of at least about 150% of the grinding ratio of a comparable abrasive wheel containing fused alumina abrasive grain as the only abrasive grain and at least about 138% of a comparable abrasive wheel containing sol-gel alumina abrasive grain as the only abrasive grain.
Claim 13
Dependent Claim
78 words
A bonded abrasive comprising a blend of sol-gel alumina abrasive grain and fused alumina abrasive grain consolidated together with a binder material to form an abrasive wheel, said abrasive wheel having a grinding ratio of at least about 150% of the grinding ratio of a comparable abrasive wheel containing fused alumina abrasive grain as the only abrasive grain and at least about 138% of a comparable abrasive wheel containing sol-gel alumina abrasive grain as the only abrasive grain.
References Cited (Backward Citations)
US3208836A
Cited
US3175894A
Cited
US3454385A
Cited
US3632320A
Cited
US3498769A
Cited
US4126429A
Cited
US4314827A
Cited
US4518397A
Cited
US4543107A
Cited
US4741743A
Cited
US4741743B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |