Mechanism for movement transmission in piston engines

A movement transmission mechanism for piston engines that allows transformation of linear movement into circular movement and vice-versa, including:

• a crankshaft having a crankshaft elbow extending along an elbow axis and a rotatably mounted member on said crankshaft elbow, said rotatable mounted member defined by two grooved wheels disposed one behind the other so that their geometric wheel axes do not coincide, each of said wheels forming one of a front positioned eccentric and a rear positioned eccentric and moving on rotation of said rotatable mounted member;
• a rotation axis located between and equally distant from each of the geometric wheel axes, said rotation axis corresponding to the elbow axis along which said crankshaft elbow extends;
• said elbow axis and each of said geometric wheel axes being parallel to one another and lying on a single plane;
• two bearing mounted connecting rods on said front positioned eccentric, a distal end of each of said connecting rods being a piston with no joint located between the piston and its associated connecting rod, each connecting rod being formed as a single piece with its associated piston;
• said connecting rods being split head connecting rods having half-heads connected to each other by grooved pins, said connecting rods being opposed to each other and having a common longitudinal axis which coincides with axes of corresponding opposite cylinders;
• a gear with inner cogs mounted on a front face of a head defined by said half-heads of the two bearing mounted connecting rods, the center and axis of said gear coinciding with the center and axis of a corresponding connecting rod bearing, said gear being fixed to and kept in position on said front face said head, said gear tangentially engaging an engaging segment of said crankshaft elbow, said crankshaft elbow having an engraved gear on the engaging segment;
• the head defined by the half-heads forming two oppositely disposed parallel planes which are parallel to the common longitudinal axis, said planes sliding between two roller holder plates disposed opposite to each other;
• and
• two additional bearing mounted connecting rods mounted without a gear on said rear positioned eccentric.