EP0147508A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Wet friction material
Assignee: Komatsu Ltd
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Filing: 1984-05-30
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Granted: —
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Expires: 2004-05-30
Abstract
Abstract A wet friction material for use in brake and clutch plates of a large sized construction vehicle which possesses porosity in the range of 2 to 85 %, preferably 9 to 72 %. The material is formed by preparing a matrix of heat-resistant fibers in the form of felt, impregnating said matrix with heat-resistant resin capable of acquiring, on curing, a smaller modulus of compressive elasticity than the fibers, and thereafter curing the impregnant in the resultant composite.
Inventors
- 👤 Masao Yamashita
- 👤 Yasutada Kibayashi
- 👤 Yutaka Miyahara
- 👤 Akira Shibata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 02:27
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/026; F16D2200/00; F16D2200/0082; F16D2200/0091
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
61 words
A wet friction material possessing porosity in the- range of 2 to 85 %, preferably 9 to 72 %, and formed by preparing a matrix of heat-resistant fibers in the form of felt, impregnating said matrix with heat-resistant resin capable of acquiring, on curing, a smaller modulus of compressive elasticity than said fibers, and curing the impregnant in the resultant composite.
Claim 2
Dependent Claim
61 words
A wet friction material possessing porosity in the- range of 2 to 85 %, preferably 9 to 72 %, and formed by preparing a matrix of heat-resistant fibers in the form of felt, impregnating said matrix with heat-resistant resin capable of acquiring, on curing, a smaller modulus of compressive elasticity than said fibers, and curing the impregnant in the resultant composite.
Claim 3
Dependent Claim
25 words
A wet friction material according to Claim 1, wherein said matrix of heat-resistant fibers is capable of melting and liable to carbonize at elevated temperature.
Claim 4
Dependent Claim
27 words
A wet friction material according to Claim 2, wherein said matrix of heat-resistant fibers is non-woven or woven fabric of Novoloid fibers (flame-retardant fibers of phenol resin).
Claim 5
Dependent Claim
30 words
. A wet friction material according to Claim 2, wherein said matrix of heat-resistant fibers is non-woven or woven fabric of acrylonitrile fibers treated in advance to acquire flame retardancy.
Claim 6
Dependent Claim
27 words
A wet friction material according to Claim 1, wherein said matrix of heat-resistant fibers is non-woven or woven fabric of non-metallic inorganic heat-resistant fibers or Alamides fibers.
Claim 7
Dependent Claim
20 words
A wet friction material according to Claim 5, wherein said non-metallic inorganic heat-resistant fibers are ceramic fibers or glass fibers.
Claim 8
Dependent Claim
24 words
A wet friction material according to Claim 1, wherein said heat-resistant resin in cured state is a copolymer of nitrile rubber and phenol resin.
Claim 9
Dependent Claim
24 words
A wet friction material according to Claim 1, wherein said heat-resistant resin in cured state is a copolymer of nitrile rubber and epoxy resin.
References Cited (Backward Citations)
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