Abstract: The apparatus described herein is capable of producing a cam which has a cam lobe having opposite sinusoidal surfaces which have at least two rises and at least two dips in 360.degree. of each sinusoidal surface with the rises in one such surface being opposite to the dips in the other such surfaces. These sinusoidal surfaces are designed so that they may be in full, centerline contact with pairs of bearings attached to connecting rods, these bearings being on opposite sides of the cam lobe and at one time being driven in one direction by one of the two pistons in each pair and then at another time in the opposite direction by the other piston in that pair, the two pistons of that pair being connected to each other by the same connecting rod carrying the bearings which are adapted to press against the cam lobe. The surfaces of the cam lobe are designed to avoid friction or binding between the bearings and the cam lobe. An engine for which this cam is particularly useful is described in applicant's U.S. Pat.

Abstract: The process described herein produces a cam which has a cam lobe having opposite sinusoidal surfaces which have at least two rises and at least two dips in 360.degree. of each sinusoidal surface with the rises in one such surface being opposite to the dips in the other such surface. These sinusoidal surfaces are designed so that they may be in full, centerline contact with pairs of bearings attached to connecting rods, these bearings being on opposite sides of the cam lobe and at one time being driven in one direction by one of the two pistons in each pair and then at another time in the opposite direction by the other piston in that pair, the two pistons of that pair being connected to each other by the same connecting rod carrying the bearings which are adapted to press against the cam lobe. The surfaces of the cam lobe are designed to avoid friction or binding between the bearings and the cam lobe. An engine for which this cam is particularly useful is described in applicant's U.S. Pat. No.

Abstract: The engine disclosed herein comprises a number of pairs of pistons, the two pistons in each pair acting in unison and the number of pairs being arranged parallel to each other and said pistons also being positioned parallel to and in a circle around the mainshaft which has a cam lobe located at a convenient part of the mainshaft and encircling the mainshaft. The cam lobe has opposite surfaces which have rises and dips, or in other words, sinusoidal surfaces, and are in contact with pairs of bearings attached to connecting rods, these bearings being on opposite sides of the cam lobe and at one time being driven in one direction by one of the two pistons in each pair and then at another time in the opposite direction by the other piston in that pair, the two pistons of that pair being connected to each other by the same connecting rod carrying the bearings which press against the cam lobe.