US3791493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction elements for braking rotary bodies
Assignee: Nippon Carbon Co Ltd
•
Filing: 1971-11-29
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Granted: 1974-02-12
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Expires: 1991-11-29
Abstract
Abstract Friction elements for braking rotary bodies, such as wheels in railway cars, electric cars and motorcars, contains 50 - 100% by weight of aluminum and said elements may be aluminum alloys or aluminum compositions. These elements may be used alone by directly sliding on a wheel or together with a conventional brake, or for a brake shoe in a disc brake.
Inventors
- 👤 M Yamaguchi
- 👤 M Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:03
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/027; F16D2069/002
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
15 words
The friction element of claim 1 Wherein said element is used as a disc brake.
Claim 2
Dependent Claim
21 words
The friction element of claim 1 wherein said element is used as a brake shoe together with a conventional brake shoe.
Claim 3
Dependent Claim
62 words
A friction element for coming forcedly into contact with at least a part of a rotary body for braking rotation thereof consisting of 50 - 85% by weight of Al, 0.1 - 10% by weight of Cu, 0.1 to 25% by weight of Si, and less than 10% by weight of at least one of Mg, Ni, Cr, Fe, Pb and Bn.
Claim 4
Dependent Claim
15 words
The friction element of claim 4 wherein said element is used as a disc brake.
Claim 5
Dependent Claim
21 words
The friction element of claim 4 wherein said element is used as a brake shoe together with a conventional brake shoe.
Claim 6
Dependent Claim
54 words
A friction element for coming forcedly into contact with at least a part of a rotary body for braking rotation thereof and is a shaped article obtained by binding a mixture of at least 50% by weight of Al and the balance of asbestos, silica, alumina, iron oxide and sand with a thermosetting resin.
Claim 7
Dependent Claim
20 words
The friction element of claim 7 wherein said thermosetting resin is phenolic resin, furan resin, polyester resin or polydivinylbenzene resin.
Claim 8
Dependent Claim
15 words
The friction element of claim 7 wherein said element is used as a disc brake.
Claim 9
Dependent Claim
21 words
The friction element of claim 7 wherein said element is used as a brake shoe together with a conventional brake shoe.
References Cited (Backward Citations)
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Cited
US3003588A
Cited
US3092214A
Cited
US3318423A
Cited
US3306401A
Cited
US3371756A
Cited
US3478849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |