US4798771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearings and other support members made of intercalated graphite
Assignee: ACHESON INTERCALTECH Inc (A MICHIGAN CORPORATION)
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Filing: 1985-08-27
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Granted: 1989-01-17
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Expires: 2005-08-27
Abstract
Abstract A bearing or other support member containing intercalated graphite exhibits many of the properties of a metal (ie: conductivity, luster, ductility) while enhancing the lubricating properties of pure graphite. The bearings are made by pressing an intercalated graphite powder either alone or mixed with metal powders, organic polymers or ceramic powders into the desired shape. This results in a bearing that has low friction properties, improved load bearing characteristics, higher operating temperatures and a reduced cost of manufacture.
Inventors
- 👤 Ferdinand L. Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:28
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/536; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3496; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/912; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
80 words
A bearing member consisting essentially of a shaped, compacted, load bearing, low friction body formed from an intercalated graphite which is stable in air and at an elevated temperature, and is produced by an intercalation reaction of graphite and an intercalating species, said intercalating species producing the stability in air and at elevated temperature of the intercalated graphite, said reaction causing the presence of oxidized carbon in the graphite and the presence of negatively charged molecules within the intercalating species.
Claim 2
Dependent Claim
80 words
A bearing member consisting essentially of a shaped, compacted, load bearing, low friction body formed from an intercalated graphite which is stable in air and at an elevated temperature, and is produced by an intercalation reaction of graphite and an intercalating species, said intercalating species producing the stability in air and at elevated temperature of the intercalated graphite, said reaction causing the presence of oxidized carbon in the graphite and the presence of negatively charged molecules within the intercalating species.
Claim 3
Dependent Claim
91 words
A bearing member in accordance with claim 1 wherein the intercalated graphite is intercalated with an intercalation species selected from the group consisting of a metal halide and a metal wherein the metal halide is selected from the group consisting of a halide of a transition element, a halide of a Group III A, IV A, V A and VI A metal or metalloid, and the metal is selected from the group consisting of a transition element, a Group III A, IV A, V A, and VI A metal or metalloid.
Claim 4
Dependent Claim
16 words
A bearing member in accordance with claim 2 wherein the intercalation species is the metal halide.
Claim 5
Dependent Claim
37 words
A bearing member in accordance with claim 3 wherein the metal halide, prior to forming said member, is reduced in situ to a metal in the presence of a reducing agent thus forming a metal intercalated graphite.
Claim 6
Dependent Claim
17 words
A bearing member in accordance with claim 1 further comprising a metal reinforcement incorporated into the member.
Claim 7
Dependent Claim
20 words
A bearing member in accordance with claim 5 wherein the metal reinforcement is interposed between layers of the intercalated graphite.
Claim 8
Dependent Claim
21 words
A bearing member in accordance with claim 5 wherein the metal reinforcement is disposed on an edge of said support member.
Claim 9
Dependent Claim
18 words
A bearing member in accordance with claim 1 further comprising a metal powder admixed with the intercalated graphite.
Claim 10
Dependent Claim
24 words
A bearing member in accordance with claim 8 wherein the metal powder is selected from the group comprised of copper, iron, nickel, and cobalt.
Claim 11
Dependent Claim
27 words
A bearing member in accordance with claim 8 wherein the metal powder comprises from about 2 percent to about 90 percent by weight of said support member.
Claim 12
Dependent Claim
18 words
A bearing member in accordance with claim 1 further comprising a thermoplastic polymer admixed with the intercalated graphite.
Claim 13
Dependent Claim
27 words
A bearing member in accordance with claim 11 wherein the thermoplastic polymer comprises from about 5 percent to about 85 percent by weight of the support member.
Claim 14
Dependent Claim
18 words
A bearing member in accordance with claim 1 further comprising a thermosetting polymer admixed with said intercalated graphite.
Claim 15
Dependent Claim
27 words
A bearing member in accordance with claim 13 wherein the thermosetting polymer comprises from about 5 percent to about 85 percent by weight of the support member.
Claim 16
Dependent Claim
18 words
A bearing member in accordance with claim 1 further comprising a ceramic powder admixed with said intercalated graphite.
Claim 17
Dependent Claim
53 words
A bearing member in accordance with claim 15 wherein the ceramic powder comprises from about 5 percent to about 85 percent by weight of the support member and wherein the ceramic powder is selected from the group comprised of silicon nitride, boron carbide, silicon carbide, partially stabilized zirconia, titanium oxides and mixtures thereof.
Claim 18
Dependent Claim
40 words
A bearing member consisting essentially of a shaped, compacted, load bearing, low friction body which is stable in air and at elevated temperature and is produced by an intercalation reaction of graphite and copper chloride, nickel chloride or chromium chloride.
Claim 19
Dependent Claim
40 words
A bearing member consisting essentially of a shaped, compacted, load bearing, low friction body which is stable in air and at elevated temperature and is produced by an intercalation reaction of graphite and copper chloride, nickel chloride or chromium chloride.
References Cited (Backward Citations)
US3323869A
Cited
US3421972A
Cited
US3409563A
Cited
US3626042A
Cited
US3859421A
Cited
DE2024185A1
Cited
US3956194A
Cited
US3950262A
Cited
US3925495A
Cited
US3984352A
Cited
US4565649A
Cited
US4128499A
Cited
US4102960A
Cited
US4119655A
Cited
US4293450A
Cited
US4414142A
Cited
US4382882A
Cited
US4461719A
Cited
GB2131500A
Cited
US4642201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |