Abstract: A tappet for an internal combustion engine includes a tappet body having a camface at one end thereof, which camface is positioned for contact with a rotating camshaft. The camface is formed essentially of zirconium oxide.

Abstract: An internal combustion engine tappet comprising a sintered powdered metal wear resistant composition having a matrix formed from iron powder, carbon in the range of 0.50-1.0% by weight, and a ferroalloy powder with a mesh size of +50-325 acting as a nucleus for diffusion of the alloying metal into the surrounding iron particles. The alloying metal in the composition is in the range of 1-10% by weight and is selected from the group consisting of chromium, titanium, boron, vanadium, columbium, molybdenum, tantalum and tungsten. The iron, carbon and ferroalloy are briquetted at a pressure of 40-60 tons/sq.in. and sintered, in solid phase, at a temperature of 2000.degree.-2100.degree. F. in a reducing atmosphere. The resulting product is heterogeneous and has hard ferroalloy nuclei and interconnected porosity with a density at the tappet wear surface of approximately 6.8-7.0 gm/cc.

Abstract: A ring-type body is provided comprising a plurality of closed continuous convolutions of wire and one end portion of the wire, of an angular extent somewhat less than 360 degrees, includes a slightly greater radius of curvature whereby it is spaced outwardly of the adjacent convolutions. The end portion terminates in a smoothly curved back turned portion defining a U-shaped seat structure for embracingly receiving the free end portion of the plunger of a syringe structure immediately inwardly of the diametrically enlarged terminal end flange thereof, the flange of the syringe plunger being clamped between the U-shaped seat structure and the opposing outer surface portions of the adjacent convolutions. The entire ring-type body including the integral wire portion defining the aforementioned U-shaped seat is constructed from a single length of wire material.

Abstract: A pair of generally semi-circular jaws are provided opening toward each other, including first and second pairs of corresponding ends and provided for clampingly embracing an arm portion therebetween. The first pair of ends of the jaws terminate in a pair of generally parallel arm portions extending outward therefrom in a direction extending away from the second pair of corresponding ends of the jaws and spring structure operatively interconnects the outer ends of the arms yieldingly biasing the latter in directions to swing the jaws toward each other. The second pair of ends of the jaws include outwardly curving terminal ends for gently "pinching" an arm injection site therebetween.

Abstract: A vehicle engine component has a specific compositon of alloyed chilled iron in which molybdenum is the major alloying element, thus producing a chilled iron with a more thermally stable carbide combined with a matrix which is stronger and more fatigue-resistant.