Connecting rod journals and crankshaft spider bearing in an engine

In an engine having an arrangement of cylinders with reciprocating pistons for drivingly rotating a crankshaft, an assembly comprising:

• a crank journal orbitally linked to the crankshaft and having a central axis offset and parallel to a central axis of the crankshaft;
• a spider bearing coaxially fixed to said crank journal and including a plurality of round cavities spaced at equal intervals about a central axis of said spider bearing at a common radius from said the central axis of said spider bearing, and each of said plurality of round cavities having an open mouth on an outer circumferential periphery of said spider bearing;
• a wrist pin fitted within each of said plurality of round cavities to define an annular channel about said wrist pin in each of said plurality of round cavities, and said annular channel communicating with the open mouth in each of said plurality of round cavities on the outer circumferential periphery of said spider bearing;
• a plurality of connecting rods each having opposite ends including a first end structured for pivotal linkage to a respective one of the reciprocating pistons and an opposite second end structured for pivotal receipt within a respective one of said plurality of round cavities and about said wrist pin to pivotally link said second end to said spider bearing;
• and
• wherein reciprocating movement of the pistons within the cylinders drives the connecting rods to rotate the spider bearing, crankshaft journal and crankshaft.