Carbonized friction article

Claim 2

Friction article as in claim 1 further characterized by up to 12 percent by weight friction modifier.

Claim 3

Friction article as in claim 1 further characterized by the article being all, or an arcuate part, of a volume of revolution generated by winding at least one filament impregnated with a carbonizable resin later carbonized.

Claim 4

Friction article as in claim 4 further characterized by the article being an arcuate part cut from a volume of revolution and usable as a brake shoe lining for engaging a mating brake drum, the shoe article having an arcuate wear surface in which 50 to 100 percent of filamentary reinforcement is substantially in line with relative rotation between said shoe and the mating drum.

Claim 5

Friction article as in claim 4 further characterized by the article being an arcuate part cut from a volume of revolution and usable as a brake or clutch friction pad when affixed to a disc, with 50 to 100 percent of filamentary reinforcement within the pad article and at a plane of mating with a relatively rotatable opposing surface extending substantially in the direction of relative rotation while the remaining 50 to 0 percent of filamentary reinforcement extends transversely and in the direction of brake or clutch application pressure.

Claim 6

A friction article having the characteristics and arrangement as in claim 1 and further characterized by the carbonized filamentary material comprising laid up layers of originally flat sheets with final carbon-to-carbon bonds both between and within the layers.

Claim 7

A friction article as in claim 7 further characterized by the article having a facing of non filamentary material.

Claim 8

A friction article as in claim 8 further characterized by the facing being carbon.

Claim 9

A pair of relatively rotatable friction articles as defined in claim 2 further characterized by at least one of the articles of the pair having a carbonized filamentary material backing portion and a facing portion which is of non filamentary carbon.

Claim 10

A friction article for operating as a structural member, said article being a hollow discoid having inner and outer peripheries and a rectangular cross section therebetween and having mechanical driving or holding notches in one of said peripheries, said article consisting essentially of (1) filamentary material which is substantially carbon and wound generally coaxial with said peripheries, and (2) a binder residue which is substantially carbon and provides carbon-to-carbon bonds with the filamentary material.

Claim 11

A friction article as in claim 11 further characterized by filamentary material density adjacent the notches being greater than filament density elsewhere in the article.

Claim 12

A friction article comprising carbonized woundup layers of filamentary material and a carbonized in situ resin binder material associated with said carbonized filamentary material and providing carbon-to-carbon bonds therewith, said article having an inner periphery and an outer periphery, and having a differential composition such that material of the article adjacent one of said peripheries has different strength and friction properties than the strength and friction properties of material of the article adjacent the other of its peripheries, whereby to provide maximal article mechanical driving strength properties adjacent one periphery and maximal friction material properties adjacent the other.