Abstract: A dual-skin structure (10, 210) comprises a first skin (12, 112, 212), a second skin (14, 114, 214) and an intermediate structure (16, 116, 216). The intermediate structure (16, 116, 216) comprises a plurality of first contact portions (18, 118, 218) connected to an interior surface of the first skin (12, 112, 212), a plurality of second contact portions (20, 120, 220) connected to an interior surface of the second skin (14, 114, 214) and a plurality of interconnecting web portions integral to the first (18, 118, 218) and second (20, 120, 220) contact portions and extending between ones of the first (18, 118, 218) and second (20, 120, 220) contact portions to form an internal supporting structure (16, 116, 216) alternating between the interior surfaces of the first (12, 112, 212) and second (14, 114, 214) skins.

Abstract: A bearing assembly has a shaft extended through a double cup with opposed tapered raceways machined directly into the cup and shaft. A row of tapered rollers is positioned between each pair of raceways, and the rollers of each row are mounted in opposition and substantially on apex. Expulsion of the rollers is prevented by annular rib rings which are press-fitted over the shaft and embrace the shaft at the large diameter ends of the tapered raceways thereon. The shaft has grooves which underlie the rib rings and enhance the holding power of the rings.