Patent US4378233A successfully refreshed from Google Patents.
US4378233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal bonded grinding wheel containing diamond or CBN abrasive
Assignee: Saint Gobain Abrasives Inc
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Filing: 1981-07-24
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Granted: 1983-03-29
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Expires: 2001-07-24
Abstract
Abstract An improved grinding wheel employing premium abrasive (diamond or cubic boron carbide) is made by employing a metal bond made from aluminum, zinc, copper, and tin, and including up to 50% of a dry film lubricant filler. The abrasive elements produced are particularly useful to form cup wheels for the dry grinding of carbide and tool steel.
Inventors
- 👤 Edgar B. Carver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:27
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/342; B24D3/02; B24D3/04; B24D3/06; C; C22; C22C; C22C26/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
A grinding wheel including an abrasive portion of diamond abrasive grits, or cubic boron nitride grits bonded in a metal matrix, said matrix consisting of metallic phase and up to 50% by volume, a dispersed particulate lubricant filler, said metal phase consisting essentially of a hot-pressed mixture of finely particulate aluminum 5 to 30%, zinc 10 to 35%, copper 20 to 70%, and tin 5 to 30%, all by volume.
Claim 2
Dependent Claim
70 words
A grinding wheel including an abrasive portion of diamond abrasive grits, or cubic boron nitride grits bonded in a metal matrix, said matrix consisting of metallic phase and up to 50% by volume, a dispersed particulate lubricant filler, said metal phase consisting essentially of a hot-pressed mixture of finely particulate aluminum 5 to 30%, zinc 10 to 35%, copper 20 to 70%, and tin 5 to 30%, all by volume.
Claim 3
Dependent Claim
29 words
A grinding wheel as in claim 1 in which the particulate filler is selected from the group consisting of polytetrafluoroethylene, graphite, molybdenum disulfide, hexagonal boron nitride, and mixtures thereof.
Claim 4
Dependent Claim
31 words
A grinding wheel as in claim 1 in which the particulate filler is present in the amount of 15 to 50% by volume of the composite of diamond, metal, and filler.
Claim 5
Dependent Claim
18 words
A grinding wheel as in claim 1 in which the diamond or cubic boron nitride is copper clad.
References Cited (Backward Citations)
US3293012A
Cited
US3904391A
Cited
US3957461A
Cited
US3925035A
Cited
US3912500A
Cited
US4246004A
Cited
US4142872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |