US4348490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction material
Assignee: Akebono Brake Industry Co Ltd
•
Filing: 1981-01-23
•
Granted: 1982-09-07
•
Expires: 2001-01-23
Abstract
Abstract A friction material wherein a heat-resistant organic fiber, which is a carbon fiber and/or a phenol fiber less than 10 mm in length, is mixed in a composition of the friction material containing a ferrous fiber and formed with a thermosetting resin binder. In particular, a friction material for braking is formed from a composition containing 5-60 wt. % of a ferrous fiber, 0.3-20 wt. % of a carbon fiber and/or a phenol fiber of less than 10 mm in length, 0.5-15 wt. % of an organic dust, 2-20 wt. % of an inorganic filler, 5-25 wt. % of lubricant, 0.2-10 wt. % of an antimony trioxide, 0-20 wt. % of a metallic powder and 3-15 wt. % of a phenol binder under heat and pressure.
Inventors
- 👤 Osao Ogiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:54
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/026
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
75 words
A friction material for braking, wherein a composition containing 5-60 wt.% of a ferrous fiber, 0.3-20 wt.% of a carbon fiber and/or a phenol fiber less than 10 mm in length and comprising 0.5-15 wt.% of an organic dust, 2-20 wt.% of an inorganic filler, 5-25 wt.% of lubricant, 0.2-10 wt.% of an antimony trioxide and 0-20 wt.% of a metallic powder is formed with 3-15 wt.% of a phenol binder under heat and pressure.
Claim 2
Dependent Claim
75 words
A friction material for braking, wherein a composition containing 5-60 wt.% of a ferrous fiber, 0.3-20 wt.% of a carbon fiber and/or a phenol fiber less than 10 mm in length and comprising 0.5-15 wt.% of an organic dust, 2-20 wt.% of an inorganic filler, 5-25 wt.% of lubricant, 0.2-10 wt.% of an antimony trioxide and 0-20 wt.% of a metallic powder is formed with 3-15 wt.% of a phenol binder under heat and pressure.
Claim 3
Dependent Claim
22 words
A friction material for braking as defined in claim 1 wherein said organic dust is a cashew dust and/or a rubber dust.
Claim 4
Dependent Claim
29 words
A friction material for braking as defined in claim 1 wherein said inorganic filler is an inorganic powder of a barium sulfate, a calcium carbonate or a calcium silicate.
Claim 5
Dependent Claim
20 words
A friction material for braking as defined in claim 1 wherein said lubricant is a graphite and/or a molybdenum disulfide.
References Cited (Backward Citations)
US4051097A
Cited
US4145223A
Cited
US4119591A
Cited
US4178278A
Cited
US4219452A
Cited
US4278584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |