Patent US4634453A successfully refreshed from Google Patents.
US4634453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic bonded grinding wheel
Assignee: Saint Gobain Abrasives Inc
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Filing: 1985-05-20
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Granted: 1987-01-06
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Expires: 2005-05-20
Abstract
Abstract A method for making grinding wheels having an annular grinding section mounted on a central hub in which a slurry of abrasive particles and ceramic bond is coated on a pre-formed core, shaped, and fired. Method has particular advantage in formation of wide wheels and contoured wheels. Premium abrasive may be employed in the wheels.
Inventors
- 👤 John Hay
- 👤 Leonard I. Smith
- 👤 George E. Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:30
CPC Classifications
B; B24; B24D; B24D3/00; B24D18/00; B24D5/00; B24D5/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
58 words
A method for making vitrified bonded grinding tools comprising coating a slip of abrasive and vitreous bond on a peripheral surface of a porous ceramic hub member while drawing a vacuum through said surface, conforming the surface of said coating to a desired shape, and firing said coating to produce a vitreous bonded grinding annulus on said hub.
Claim 2
Independent Claim
58 words
A method for making vitrified bonded grinding tools comprising coating a slip of abrasive and vitreous bond on a peripheral surface of a porous ceramic hub member while drawing a vacuum through said surface, conforming the surface of said coating to a desired shape, and firing said coating to produce a vitreous bonded grinding annulus on said hub.
Claim 3
Dependent Claim
30 words
A method in claim 1 in which said coating contains an abrasive selected from the group consisting of diamond and CBN and combinations with each other or with other abrasives.
Claim 4
Dependent Claim
13 words
A method as in claim 1 in which the hub member is prefired.
Claim 5
Dependent Claim
10 words
A grinding wheel produced by the method of claim 1.
Claim 6
Dependent Claim
14 words
A method as in claim 1 in which said surface is a side surface.
Claim 7
Dependent Claim
14 words
A method as in claim 1 in which said surface is a cylindrical surface.
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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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |