US3723382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction materials
Assignee: BBA Group Ltd
•
Filing: 1971-04-13
•
Granted: 1973-03-27
•
Expires: 1991-04-13
Abstract
Abstract A friction material for friction braking or transmission systems including in its finished state a two-part binder system, one part being a phenolic thermosetting resin and the other part being uncombined nickel and sulphur. The nickel and sulphur are capable of reacting together under the action of heat generated during application of the system to form nickel sulphide which provides additional binding in the material and compensates for thermal decomposition of the resin. Friction modifiers and fillers may also be included.
Inventors
- 👤 J Lumb
- 👤 M Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:12
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A compacted wear-resistant friction material for use in friction braking or transmission systems, the said friction material in its finished state comprising from 10 to 50 parts by weight of an inorganic fibrous material, five to 30 parts by weight of phenolic thermosetting resin, two to 30 parts by weight of finely divided nickel and two to 15 parts by weight of powdered sulphur, substantially all of the nickel and the sulphur being uncombined, the uncombined nickel and sulphur capable of progressively combining with each other under the action of heat developed as a result of frictional engagement in the system to provide additional binding in the friction material.
Claim 2
Dependent Claim
119 words
A compacted wear-resistant friction material for use in friction braking or transmission systems, the said friction material in its finished state comprising from 10 50 parts by weight of an inorganic fibrous material, five to 30 parts by weight of phenolic thermosetting resin, two to 30 parts by weight of finely divided nickel and two to 15 parts be weight of powdered sulphur, a portion of the nickel and sulphur being combined in situ as nickel sulphide, and another portion of the nickel and sulphur being uncombined and capable of progressively combining with each other under the action of heat developed as a result of frictional engagement in the said system to provide additional binding in the friction material.
Claim 3
Dependent Claim
15 words
A material according to claim 2, containing 5 to 20 parts by weight of nickel.
Claim 4
Dependent Claim
11 words
A material according to claim 2 further including a friction modifier.
Claim 5
Dependent Claim
10 words
A material according to claim 2 further including a filler.
Claim 6
Dependent Claim
28 words
A material according to claim 2 wherein the phenolic thermosetting resin comprises at least one compound selected from the group consisting of phenol formaldehyde and borated phenol formaldehyde.
Claim 7
Dependent Claim
144 words
In a method wherein a friction material pad is engaged with a moving element of a friction braking or transmission systems which produces heat by friction, the improvement comprising: maintaining the frictional qualities of said friction material pad by utilizing a wear-resistant frictional material which comprises 10 to 50 parts by weight of inorganic fibrous material in a two-part binder system, one part of said binder comprisinG five to 30 parts by weight of a phenolic thermosetting resin, and the other part of said binder comprising a mixture of two to 30 parts by weight of finely divided nickel and two to 15 parts by weight of powdered sulphur, wherein at least a portion of said nickel and said sulphur are uncombined, whereby the frictional heat produced progressively combines the uncombined nickel and sulphur to produce additional binding in the frictional material during use.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |