Abstract: A body has a substantially flat and very smooth support surface having a plurality of holes therein which intersect the support surface to form sharp edges around the holes. Connectors are provided on the sides of the body for connecting similar bodies to one another. A plurality of projections extend outwardly from the surface to enhance the glide properties of inline hockey pucks. The projections have a base dimension at the support surface in the range of about 0.5 mm to about 1.5 mm and extend outwardly from the surface a distance in the range of about 0.1 mm to about 0.6 mm. The projections are spaced from one another a distance in the range of about 3 mm to about 10 mm, and the density of projections per square centimeter of the support surface is in the range of about 1 to about 9.

Abstract: A multivalve internal combustion engine uses multiple inlet ports (2,3), each having a separate throttle (6), a fuel injection (7) and an intake valve (5). The individual inlet ports are positioned in such a way that they join the cylinderhead essentially in the same circumferential direction, thereby achieving a continuous unidirectional whirl in the cylinder at all engine speeds and loads. At low engine speeds, only one inlet port is opened; further inlet ports are opened progressively. The diameter of the inlet ports differ in size, whereby the first opened inlet port generates the fastest gas speed and the subsequent inlet ports generate successively slower gas speeds. Achieving an uninterrupted continuous strong whirl turbulence in the cylinder throughout the engine speed range, results in overall higher maximum power output, a clean fast burn and optimum torque characteristics using variable gas column adjustments.