Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Coated or impregnated woven – knit – or nonwoven fabric which... – Coating or impregnation is anti-slip or friction-increasing...
Reexamination Certificate
1999-05-05
2001-08-21
Cole, Elizabeth M. (Department: 1771)
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Coated or impregnated woven, knit, or nonwoven fabric which...
Coating or impregnation is anti-slip or friction-increasing...
C442S076000, C442S179000, C442S187000
Reexamination Certificate
active
06277769
ABSTRACT:
BACKGROUND OF THE INVENTION
Certain machinery, particularly in large mining, construction and like vehicles, severe conditions can be imposed on friction materials used in transmissions and brakes. To dissipate friction generated heat in these applications, it is known to circulate cooling oil across the faces of the friction material and opposing plate. Known premium friction products for these applications have included so-called “paper” based materials. Paper friction materials in wet applications are capable of handling energy densities of, for example, 150 to 200 joules/cm
2
. As equipment gets larger, heavier, and/or faster, there is a need for higher performance friction materials.
SUMMARY OF THE INVENTION
The invention provides a friction material composite that affords much greater performance than has been achieved with other known commercial materials. In the disclosed embodiment, the composite material is a carbon fiber fabric preferably woven and critically saturated with a resin such as phenolic resin.
It has been found that, surprisingly, when such fabric is saturated with the appropriate relative amount of resin, energy density capacity is far greater than has been experienced with prior commercial materials. In accordance with the invention, the resin loading is sufficient to wet the fibers and adhere them to any contacting or closely adjacent fibers. The resulting composite material is relatively impervious to any flow of cooling oil through it, but has sufficient macro surface irregularities to support pockets of cooling oil at its working surface. Since the friction material of the invention is several times more effective than prior materials, drive or brake assemblies using this material can be reduced in size and weight and/or much longer service life can be obtained where desired.
REFERENCES:
patent: 4268467 (1981-05-01), Wagner
patent: 4384640 (1983-05-01), Trainor et al.
patent: 4656203 (1987-04-01), Parker
patent: 4700823 (1987-10-01), Winckler
patent: 5662993 (1997-09-01), Winckler
patent: 5952249 (1999-09-01), Gibson et al.
Csarny Thomas F.
Dowell Richard E.
Cole Elizabeth M.
Pearne & Gordon LLP
S.K.. Wellman Corp.
Torres Norca L.
LandOfFree
High energy friction product does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High energy friction product, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High energy friction product will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2547550