US4189424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction material for brakes of bicycles or the like
Assignee: Shimano Inc
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Filing: 1978-04-17
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Granted: 1980-02-19
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Expires: 1998-04-17
Abstract
Abstract A friction material used for brakes of bicycles or the like, which is constituted mainly of synthetic rubber base materials blended with one or more of titanium oxide, tin oxide, and cobalt oxide, in a ratio of 50 to 75 wt. % with respect to the total weight of the friction material, thereby eliminating the deterioration of braking effect in rainy weather.
Inventors
- 👤 Masatoshi Takamatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:58
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
60 words
A friction material for brakes used for bicycles and the like, which comprises a base member of synthetic rubber based on silicone or butadiene blended with one or more of titanium oxide, tin oxide and cobalt oxide, the latter being present in a ratio of 50 to 75 Wt. % with respect to the total weight of the friction material.
Claim 2
Dependent Claim
60 words
A friction material for brakes used for bicycles and the like, which comprises a base member of synthetic rubber based on silicone or butadiene blended with one or more of titanium oxide, tin oxide and cobalt oxide, the latter being present in a ratio of 50 to 75 Wt. % with respect to the total weight of the friction material.
Claim 3
Dependent Claim
16 words
The friction material according to claim 1, wherein said synthetic rubber is nitrile butadiene rubber (NBR).
Claim 4
Dependent Claim
16 words
The friction material according to claim 1, wherein said synthetic rubber is styrene butadiene rubber (SBR).
Claim 5
Dependent Claim
20 words
The friction material according to claim 1, wherein said base material includes carbon, vulcanizing accelerator, age resister, plasticizer and binder.
Claim 6
Dependent Claim
20 words
The friction material according to claim 1, wherein said material has an International Rubber Hardness degree of 85 or more.
Claim 7
Dependent Claim
27 words
The friction material according to claim 1, wherein said titanium oxide, thin oxide and cobalt oxide, are silane-coupling-processed so as to be blended with the base material.
Claim 8
Dependent Claim
48 words
The friction material according to claim 6, wherein silane for said silane coupling process is blended with one or more of titanium oxide, tin oxide and cobalt oxide, in a ratio of 0.6 to 3 wt. % or more with respect to the total weight of said oxides.
Claim 9
Dependent Claim
72 words
A friction material for a brake used for bicycles or the like, said friction material comprising a rubbery butadiene fibre base material including carbon, vulcanizing accelerator, age resister, plasticizer and binder, said base material being blended with one or more of silane-coupling-processed titanium oxide, tin oxide and cobalt oxide, said oxides being present in a ratio of 50 to 75 wt. % with respect to the total weight of said friction material.
Claim 10
Dependent Claim
72 words
A friction material for a brake used for bicycles or the like, said friction material comprising a rubbery butadiene fibre base material including carbon, vulcanizing accelerator, age resister, plasticizer and binder, said base material being blended with one or more of silane-coupling-processed titanium oxide, tin oxide and cobalt oxide, said oxides being present in a ratio of 50 to 75 wt. % with respect to the total weight of said friction material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |