Abstract: A moldable, plastic idler pulley is formed of two halves, each having a matching central hub and a radially outwardly extending web with radially disposed strengthening ribs on the outside thereof. The inner side of each central hub has a moldable stepped portion which closely mates the other hub. The stepped portions of each hub and the ribs have no under cuts or reverse bends and may be molded by two simple, axially parting mold elements. After molding, the ribs cooperate with a rotary machine to allow the stepped portions of each hub to be spin welded together. A central bearing may be captured between the hubs during the welding process, if desired.

Abstract: In an engine valve train, each rocker arm and its associate fulcrum are provided with cooperating inner and outer cylindrical surface contours carrying the reaction forces of rocker arm, the ratio of the radius of the outer surface contour being approximately in the order of 3:1 to 1.7:1 and preferably 2:1, the rocker arm and fulcrum having a cooperating retainer recess and pin, intermediate the ends of the associate bearing surface, to maintain alignment of these elements in substantially rolling contact with each other during pivotable movement of the rocker arm. In the preferred embodiment the radii of curvature of these bearing surfaces are selected in the ratio of 2:1 so as to obtain rolling motion known as cardanic motion, the recess being defined by opposed inclined flat surfaces and, the working surfaces of the pin being of semi-circular profile in substantial two-point contact with the surface defined by the recess.

Abstract: This energy absorber for use on automotive vehicles has a cylinder slidably mounted in a support bracket to flex a belt of energy absorbing material on bumper impact to dissipate impact energy. The cylinder has integral radial connector straps at its outer end to facilitate bumper attachment. The belt is looped around a pair of pins, one being slidably mounted in a travel slot and the other in an end notch facilitating assembly of the belt into the cylinder. Preferably the energy absorber cylinder and connector straps are made from a one piece stamping rolled into a cylinder and seam welded.

Abstract: This energy absorber for use on automotive vehicles has a cylinder slidably mounted in a support bracket to flex a belt of energy absorbing material on bumper impact to dissipate impact energy. The cylinder has integral radial connector straps at its outer end to facilitate bumper attachment. The belt is looped around a pair of pins, one being slidably mounted in a travel slot and the other in an end notch facilitating assembly of the belt into the cylinder. Preferably the energy absorber cylinder and connector straps are made from a one piece stamping rolled into a cylinder and seam welded.