US4187133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing a clutch facing
Assignee: Aisin Corp
•
Filing: 1977-08-19
•
Granted: 1980-02-05
•
Expires: 1997-08-19
Abstract
Abstract A method of manufacturing a clutch facing including the steps of mixing graphite and phenolic resin to form a graphite mixture, soaking an asbestos fiber string within the mixture, removing the soaked string such that phenolic resin content of between 14-24 weight percents and graphite content of between 1-8 weight percents for every 100 weight percents is produced and bonding the string to the clutch facing such that the Rockwell hardness of the clutch facing is between 20-60 on the Moh scale.
Inventors
- 👤 Yasunobu Yamamoto
- 👤 Ryoichi Tomikawa
- 👤 Toshiaki Sakabe
- 👤 Yasuhiro Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:15
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/021; F16D69/022; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
A method of manufacturing a clutch facing, comprising: mixing graphite and phenolic resin to form a graphite mixture; soaking an asbestos fiber string within said graphite mixture; producing a soaked asbestos fiber string comprising a phenolic resin content of 14-24 weight percents and graphite content of 1-8 weight percents for every 100 weight percent of said soaked asbestos fiber string; and bonding said soaked asbestos fiber string to said clutch facing wherein the Rockwell hardness of said clutch facing is between 20-60 on the Moh scale.
Claim 2
Independent Claim
86 words
A method of manufacturing a clutch facing, comprising: mixing graphite and phenolic resin to form a graphite mixture; soaking an asbestos fiber string within said graphite mixture; producing a soaked asbestos fiber string comprising a phenolic resin content of 14-24 weight percents and graphite content of 1-8 weight percents for every 100 weight percent of said soaked asbestos fiber string; and bonding said soaked asbestos fiber string to said clutch facing wherein the Rockwell hardness of said clutch facing is between 20-60 on the Moh scale.
Claim 3
Dependent Claim
26 words
A method as claimed in claim 1, wherein said step of bonding said string to said clutch facing includes forming said string into a loop shape.
Claim 4
Dependent Claim
15 words
A method as claimed in claim 1, wherein said phenolic resin comprises thermosetting resol resin.
Claim 5
Dependent Claim
23 words
A method as claimed in claim 1, wherein said phenolic resin comprises thermo novolak resin and wherein a curing agent is added thereto.
Claim 6
Dependent Claim
30 words
A method as claimed in claim 1, further comprising the step of preparing said graphite mixture in a solvent prior to said step of producing said soaked asbestos fiber string.
Claim 7
Dependent Claim
18 words
A method as claimed in claim 1, wherein said graphite mixture consists essentially of graphite and phenolic resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |