Patent US3954479A successfully refreshed from Google Patents.
US3954479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature and wear-resistant antifriction material having low thermal expansions
Assignee: Schott AG
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Filing: 1974-02-19
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Granted: 1976-05-04
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Expires: 1994-02-19
Abstract
Abstract A compact, self-supporting solid article of manufacture consisting essentially high temperature and wear-resistant antifriction material of low thermal expansion in the form of a heterogeneous sintered article of a matrix of glass or glass ceramic of low thermal expansion and distributed within the matrix small particles of at least one temperature and wear-resistant antifriction oxide selected from the group consisting of nickel oxide, cobalt oxide, ferric oxide, bismuth oxide and chromic oxide.
Inventors
- 👤 Walter Jahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:04
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/043; C; C03; C03C; C03C4/00; F16C2206/00; F16C2206/40; F16C2206/42
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
A compact, self-supporting solid article of manufacture consisting essentially of high temperature and wear-resistant antifriction material of low thermal expansion in the form of a heterogeneous sintered article of a matrix of glass or glass ceramic of low thermal expansion and distributed substantially uniformly within the matrix small particles comprising at least one temperature and wear-resistant antifriction oxide selected from the group consisting of nickel oxide, cobalt oxide, ferric oxide, bismuth oxide and chromic oxide, said matrix having a thermal expansion of from -10 to +50.10.sup. -7 per degree Celsius and comprising the following composition in percent by weight SiO.sub.2 40 - 80
Al.sub.2 O.sub.3 0 - 40
B.sub.2 O.sub.3 0 - 70
alkali metal oxides
2 - 20.
Claim 2
Dependent Claim
119 words
A compact, self-supporting solid article of manufacture consisting essentially of high temperature and wear-resistant antifriction material of low thermal expansion in the form of a heterogeneous sintered article of a matrix of glass or glass ceramic of low thermal expansion and distributed substantially uniformly within the matrix small particles comprising at least one temperature and wear-resistant antifriction oxide selected from the group consisting of nickel oxide, cobalt oxide, ferric oxide, bismuth oxide and chromic oxide, said matrix having a thermal expansion of from -10 to +50.10.sup. -7 per degree Celsius and comprising the following composition in percent by weight SiO.sub.2 40 - 80
Al.sub.2 O.sub.3 0 - 40
B.sub.2 O.sub.3 0 - 70
alkali metal oxides
2 - 20.
Claim 3
Dependent Claim
38 words
An article of manufacture as defined by claim 1, wherein the solid article comprises 20-80% by weight of glass or glass ceramic as the matrix and 80-20% of the small particles as the temperature and wear-resistant antifriction oxide.
Claim 4
Dependent Claim
34 words
An article of manufacture according to claim 1, wherein the matrix consists of a glass having about the following composition: SiO.sub.2 51.0% by weight
Al.sub.2 O.sub.3 36.7% by weight
Li.sub.2 O 12.3% by weight.
Claim 5
Dependent Claim
30 words
An article of manufacture according to claim 1, wherein said small particles comprise a member selected from the group consisting of calcium fluoride, lead oxide, magnesium phosphate, and mixtures thereof.
Claim 6
Dependent Claim
20 words
An article of manufacture according to claim 1, wherein said antifriction oxide comprises at least 70% by weight nickel oxide.
Claim 7
Dependent Claim
25 words
An article of manufacture according to claim 1, containing a metallic additive selected from the group consisting of nickel powder, cobalt powder and mixtures thereof.
Claim 8
Dependent Claim
21 words
An article of manufacture according to claim 1, wherein said small particles have a particle size of 5 to 100 microns.
Claim 9
Dependent Claim
38 words
An article of manufacture as defined by claim 7, wherein the solid article comprises 20-80% by weight of glass or glass ceramic as the matrix and 80-20% of the small particles as the temperature and wear-resistant antifriction oxide.
Claim 10
Dependent Claim
20 words
An article of manufacture according to claim 8, wherein said antifriction oxide comprises at least 70% by weight nickel oxide.
Claim 11
Dependent Claim
31 words
An article of manufacture according to claim 6, wherein said metallic additive is present in a concentration be weight of 5 - 20% based on the weight of the anti-friction particles.
Claim 12
Dependent Claim
10 words
An article according to claim 1 which is a bearing.
Claim 13
Dependent Claim
10 words
An article according to claim 2 which is a bearing.
Claim 14
Dependent Claim
10 words
An article according to claim 6 which is a bearing.
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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) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |