Abstract: A conical pulley for belt Continuously-Variable-Transmissions allowing a bigger than the width W of the belt maximum axial displacement of the one conical pulley half relative to the other, achieving a bigger than 0.5*W*tan(F) difference between the maximum and the minimum effective radiuses of the belt as it runs on the pulley, wherein F is the angle of the working conical surfaces of the pulley, providing a substantial increase of the transmission gear ratio range that enables faster accelerations at the low gear ratios and better mileage and quieter operation at the high gear ratios.

Abstract: A controllable Continuously Variable Transmission, of the V-belt type, wherein an auxiliary belt surrounds the V-belt at the one pulley side; a lever—having free rollers around which the auxiliary belt rides—controls, through the auxiliary belt, the transmission ratio.

Abstract: A conical pulley for belt Continuously-Variable-Transmissions allowing a bigger than the width W of the belt maximum axial displacement of the one conical pulley half relative to the other, achieving a bigger than 0.5*W*tan(F) difference between the maximum and the minimum effective radiuses of the belt as it runs on the pulley, wherein F is the angle of the working conical surfaces of the pulley, providing a substantial increase of the transmission gear ratio range that enables faster accelerations at the low gear ratios and better mileage and quieter operation at the high gear ratios.

Abstract: With shaped connecting rod, piston and cylinder, an advantageous asymmetric timing of the two-stroke engine is achieved, wherein the combustion chamber communicates with the crankcase through a transfer port controlled by the piston and through a respective piston port controlled by the connecting rod, with the transfer port and its respective piston port arranged “in series”, and wherein an intake port communicates with the crankcase through a piston port controlled by the connecting rod, with the intake port and its respective piston port arranged “in series”.

Abstract: A disk rotary valve assembly for reciprocating piston positive displacement machines, the disk rotary valve having a pair of oppositely arranged fronts, the forces on the pair of oppositely arranged fronts due to the high pressure inside the chamber cancel each other leaving the supports of the disk rotary valve unloaded and improving the sealing quality.

Abstract: A rolling bearing wherein the conventional cage is replaced by independent spacers, one per pair of neighbor rolling elements, each spacer is disposed and trapped between neighbor rolling elements, each spacer is supported on its neighbor rolling elements and is preventing them from coming into contact with each other, each spacer comprising, preferably, a case and a number of auxiliary rolling elements, resulting in rolling bearings having higher load capacity and reduced sliding friction, also a method to improve the conventional cylindrical roller bearings, the conventional ball bearings and the conventional thrust roller bearings.

Abstract: A two-stroke engine working on the Miller/Atkinson cycle, wherein a space underside the piston crown is divided by a separator into two complimentary sections communicating with each other through a passage controlled by a valve so that the engine avoids the subpressure under the piston crown.

Abstract: A valve integral with, or secured to, the connecting rod small end of a reciprocating piston positive displacement machine opens and closes a port controlling the communication of two spaces, for gas pumps, scavenging pumps, compressors, superchargers, pumps etc.

Abstract: With shaped connecting rod, piston and cylinder, an advantageous asymmetric timing of the two-stroke engine is achieved, wherein the combustion chamber communicates with the crankcase through a transfer port controlled by the piston and through a respective piston port controlled by the connecting rod, with the transfer port and its respective piston port arranged “in series”, and wherein an intake port communicates with the crankcase through a piston port controlled by the connecting rod, with the intake port and its respective piston port arranged “in series”.

Abstract: Over-clamping compensation mechanisms for the V-belt CVT's, either by using a controllably movable support wherein the spring of the driven pulley abuts, or by using a centrifugal mechanism to offset a part of the action of the spring onto the axially movable half of the driven pulley, applicable in all V-belt CVT's and providing increased efficiency, less power loss, better performance, improved reliability, longer time between overhauls etc.

Abstract: A constant velocity joint comprising a first shaft rotating about a first rotation axis, a second shaft rotating about a second rotation axis, with the first and the second rotation axes intersecting at the center of the joint, three triads of yokes, each triad of yokes comprising a control yoke, a first shaft yoke pivotally mounted on the first shaft and a second yoke pivotally mounted on the second shaft, with the three yokes of the triad of yokes pivotally mounted to each other to pivot about a common axis passing from the center of the joint, the three control yokes, one from each triad of yokes, are pivotally mounted to each other to pivot about a common axis passing from the center of the joint, with the transmission ratio of the constant velocity joint remaining strictly at 1:1 no matter what the angle between the two rotation axes is.

Abstract: A controllable Continuously Variable Transmission, of the V-belt type, wherein an auxiliary belt surrounds the V-belt at the one pulley side; a lever—having free rollers around which the auxiliary belt rides—controls, through the auxiliary belt, the transmission ratio.

Abstract: A disk rotary valve assembly for reciprocating piston positive displacement machines, the disk rotary valve having a pair of oppositely arranged fronts, the forces on the pair of oppositely arranged fronts due to the high pressure inside the chamber cancel each other leaving the supports of the disk rotary valve unloaded and improving the sealing quality.

Abstract: In a “cat and mouse” rotary engine two rotor-pistons are connected by concentric crosses to two inclined power shafts, improving the balance of the engine, ridding the bearings of the rotor-pistons from heavy idle loads, allowing lighter and more robust structure and making the arrangement proper for divided load applications like portable flyers, REM etc.

Abstract: A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel.

Abstract: A valve integral with, or secured to, the connecting rod small end of a reciprocating piston positive displacement machine opens and closes a port controlling the communication of two spaces, for gas pumps, scavenging pumps, compressors, superchargers, pumps etc.

Abstract: A constant velocity joint comprising a first shaft (2) rotating about a first rotation axis (X1), a second shaft (3) rotating about a second rotation axis (X2), a triad of yokes (5) comprising a control yoke (6), a first shaft yoke (7) and a second shaft yoke (8), the first shaft yoke (7) being pivotally mounted on the first shaft (2) with the pivot axis (A1) being oblique to the first rotation axis (X1), the second shaft yoke (8) being pivotally mounted on the second shaft (3) with the pivot axis (A2) being oblique to the second rotation axis (X2), the three yokes of the triad of yokes (5) being pivotally mounted to each other to pivot about a common axis (C) passing from the center (4) of the joint, a set of additional pivotally mounted yokes providing support to the control yoke (6) so that the transmission ratio between the first shaft (2) and the second shaft (3) of the joint (1) remains strictly at 1:1.

Abstract: The mass production of the MultiAir/UniAir of Fiat/INA proves that the hydraulic control can reliably actuate the valves of the modern internal combustion engines, making them greener. Removing the valve springs from the valves and controlling by the cam not only the valve opening but also the valve restoring, the hydraulic system has easier work to do, the rev limit increases, the height and the cost of the engine decrease and the engine can operate according all the MultiAir strategies. Optionally, the control by high speed solenoid valves can be replaced by easier and cheaper control wherein the rotation of the oil piston is what varies the valve lift and the valve duration. If necessary, slow, cheap, low power servomotors can micro-align the angular displacement of different oil pistons to balance the load between the cylinders.

Abstract: A constant velocity joint comprising a first shaft (2) rotating about a first rotation axis (X1), a second shaft (3) rotating about a second rotation axis (X2), a triad of yokes (5) comprising a control yoke (6), a first shaft yoke (7) and a second shaft yoke (8), the first shaft yoke (7) being pivotally mounted on the first shaft (2) with the pivot axis (A1) oblique to the first rotation axis (X1), the second shaft yoke (8) being pivotally mounted on the second shaft (3) with the pivot axis (A2) oblique to the second rotation axis (X2), the three yokes of the triad of yokes (5) being pivotally mounted to each other to pivot about a common axis (C) passing from the center (4) of the joint, a set of additional pivotally mounted yokes (9) providing support to the control yoke (6) so that the transmission ratio between the first shaft (2) and the second shaft (3) of the constant velocity joint (1) remains strictly at 1:1.

Abstract: Uniflow two-stroke engines without ports on the cylinder and with four-stroke lubrication.