Patent US4294712A successfully refreshed from Google Patents.
US4294712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-lubricating bearing
Assignee: Bando Chemical Industries Ltd
•
Filing: 1980-08-21
•
Granted: 1981-10-13
•
Expires: 2000-08-21
Abstract
Abstract A self-lubricating bearing comprising a molded composite material prepared by blending lubricating oil, polynorbornene type resin and/or expanded graphite, and a main bearing material comprising a self-lubricating and abrasive resistant synthetic resin. Metal powders may be added to the synthetic resin as the main bearing material. The inventive bearing can perform under heavy loads and have a long life time.
Inventors
- 👤 Toshihiko Ueno
- 👤 Teruhisa Tomogane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:40
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
A self-lubricating bearing comprising 1 to 40 volume percent lubricating oil; 0.1 to 20 volume percent carrier for said lubricating oil, said carrier being selected from the group consisting of polynorbornene resin, expanded graphite and mixtures thereof; and remainder main bearing material comprising another synthetic resin having properties of slidability and abrasion resistance.
Claim 2
Dependent Claim
53 words
A self-lubricating bearing comprising 1 to 40 volume percent lubricating oil; 0.1 to 20 volume percent carrier for said lubricating oil, said carrier being selected from the group consisting of polynorbornene resin, expanded graphite and mixtures thereof; and remainder main bearing material comprising another synthetic resin having properties of slidability and abrasion resistance.
Claim 3
Dependent Claim
41 words
The bearing of claim 1, wherein said carrier is polynorbornene resin have a molecular weight of more than 2 million and a glass transition point of about 35° C. and used in an amount of from 0.1 to 20 volume percent.
Claim 4
Dependent Claim
15 words
The bearing of claim 1, wherein said carrier is polynorbornene resin comprising a vulcanizing agent.
Claim 5
Dependent Claim
63 words
The bearing of claim 1, wherein said carrier is an expanded graphite prepared by heating ordinary graphite at 200° to 1000° C. for a suitable period of time, to expand same in the C-axis direction, and used in an amount of from 0.5 to 20 volume percent, wherein said lubricating oil is used in an amount of from 1 to 20 volume percent.
Claim 6
Dependent Claim
23 words
The bearing of claim 4, wherein the absorbency ratio of graphite to lubricating oil ranges from 1 cc/0.2 cc to 1 cc/5 cc.
Claim 7
Dependent Claim
17 words
The bearing of claim 1, wherein said carrier is a combination of polynorbornene resin and expanded graphite.
Claim 8
Dependent Claim
14 words
The bearing of claim 6, wherein said expanded graphite is replaced by ordinary graphite.
Claim 9
Dependent Claim
34 words
The bearing of claim 1, wherein said main bearing material comprises a combination of synthetic resin and metal powder, said metal powder being used in an amount of from 0.5 to 50 volume percent.
Claim 10
Dependent Claim
22 words
The bearing of claim 8, wherein said metal powder is selected from the group consisting of kelmet alloy powder and bronze powder.
Claim 11
Dependent Claim
25 words
The bearing of claim 1, wherein said lubricating oil is selected from the group consisting of aromatic oil, naphthenic oil, parafinic oil and synthetic oil.
Claim 12
Dependent Claim
22 words
The bearing of claim 1, wherein said synthetic resin is selected from the group consisting of polyamides, polyacetals, polybutylenephthalates, polycarbonates, and polytetrafluroethylenes.
References Cited (Backward Citations)
US4100245A
Cited
US3830860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |