Abstract: A variety of methods, systems, and apparatus are disclosed, including, in one embodiment, a drill bit, comprising: a bit body defining a rotational axis and having a plurality of cutter pockets formed thereon, each cutter pocket shaped to receive a respective substrate of a cutter with a cutting table secured thereon, wherein the substrate of at least one cutter has an outer profile defining an area of increased braze gap; and a braze interface comprising a braze alloy disposed in each cutter pocket between the inner profile of the cutter pocket and the outer profile of the respective substrate, such that a thickness of the braze alloy is greater at the area of increased braze gap.

Abstract: The present invention relates to a pneumatic tire having a rubber component comprised of (A) 100 parts by weight of at least one elastomer containing olefinic unsaturation; (B) 10 to 120 phr of a filler selected from carbon black and silica; (C) 0.1 to 10 phr of N,N?-(m-phenylene) bismaleamic acid; (D) 0.1 to 0.5 phr of zinc dibenzyl dithiocarbamate; and (E) 0.1 to 5 phr of an additional cure accelerator.

Abstract: The present invention relates to a pneumatic tire with a built-in sealant layer comprised of a depolymerized butyl rubber based sealant precursor. The butyl rubber of the built-in sealant precursor composition is depolymerized in situ within the tire with an activated free radical generating organoperoxide. The organoperoxide is activated with a 2,2,6,6-tetra alkyl piperidine hindered amine. Representative of such hindered amines are, for example, a poly[[6-[1,1,3,3,-tetramethylbutyl)amino]-s-triazine-2,4-diyl][2,2,6,6,-tetramethyl-4-piperidyl)imino]hexamethylene[(2,2,6,6-tetramethyl-4-piperidyl)imino]] compound. The sealant layer, if desired, may be of a color which contrasts with black. For such purpose the sealant layer may contain a colorant of a non-black color to a substantial exclusion of carbon black.

Abstract: The present invention relates to a pneumatic tire having a rubber component comprised of (a) 100 parts by weight of at least one elastomer containing olefinic unsaturation; (b) 10 to 120 phr of carbon black; (c) 10 to 120 phr of silica; and (d) 0.1 to 10 phr of N,N?-(m-phenylene) bismaleamic acid.