This invention is an all gear infinitely variable transmission that is non-dependent on friction. It can me be used in high torque applications. It offers a steady and uniform output for a steady and uniform input. It allows a co-axial input and output thereby by using a planetary gear system the output can be made continuous from forward to reverse. This uses a scotch-yoke mechanism to convert rotational motion to a linear reciprocating motion. The linear distance of this reciprocating motion-stroke is changed by altering the crankpin location of the scotch-yoke mechanism. This reciprocating motion is converted to a rocking motion by using a rack and pinion and later converted to a unidirectional motion via a One-Way-Bearing. A set of non-circular gears are used to achieve a steady and uniform output. It employs a very simple mechanism to change the ratio between the input and output of the transmission.

A variable speed ratio transmission comprises a support structure, an input member, an output member and a plurality of planet wheels which are supported rotatably on the support structure and which receive the movement from the input member. Each of the planet wheels comprises a connecting rod which is rotatably connected thereto in the region of a first end thereof and which supports at an opposite end thereof a unidirectional connection wheel which entrains in rotation the output member. The transmission further comprises a variation device for the spacing between the pivot axis of the connecting rods and a respective rotation axis of the planet wheels.

A variable speed ratio transmission comprises a support structure, an input member, an output member and a plurality of planet wheels which are supported rotatably on the support structure and which receive the movement from the input member. Each of the planet wheels comprises a connecting rod which is rotatably connected thereto in the region of a first end thereof and which supports at an opposite end thereof a unidirectional connection wheel which entrains in rotation the output member. The transmission further comprises a variation device for the spacing between the pivot axis of the connecting rods and a respective rotation axis of the planet wheels.

This invention is an all gear continuously variable transmission that is non-dependent on friction. It can me be used in high torque applications. It offers a steady and uniform output for a steady and uniform input. It allows a co-axial input and output thereby by using a planetary gear system the output can be made continuous from forward to reverse. This uses a scotch-yoke mechanism to convert rotational motion to a linear reciprocating motion. The linear distance of this reciprocating motion-stroke is changed by altering the crankpin location of the scotch-yoke mechanism. This reciprocating motion is converted to a rocking motion by using a rack and pinion and later converted to a unidirectional motion via a One-Way-Bearing. A set of non-circular gears are used to achieve a steady and uniform output. It employs a very simple mechanism to change the ratio between the input and output of the transmission.

This invention is an all gear continuously variable transmission that is non-dependent on friction. It can me be used in high torque applications. It offers a steady and uniform output for a steady and uniform input. It allows a co-axial input and output thereby by using a planetary gear system the output can be made continuous from forward to reverse. This uses a scotch-yoke mechanism to convert rotational motion to a linear reciprocating motion. The linear distance of this reciprocating motion-stroke is changed by altering the crankpin location of the scotch-yoke mechanism. This reciprocating motion is converted to a rocking motion by using a rack and pinion and later converted to a unidirectional motion via a One-Way-Bearing. A set of non-circular gears are used to achieve a steady and uniform output. It employs a very simple mechanism to change the ratio between the input and output of the transmission.

A continuously variable transmission (CVT) that does not depend on friction to transmit power. A constant and uniform output angular velocity can be achieved when the input angular velocity is constant and uniform by modifying the rate of change of angular displacement of the input disk using a set of non-circular gears. Co-axial input and output can also be achieved.

A continuously variable transmission (CVT) that does not depend on friction to transmit power. A constant and uniform output angular velocity can be achieved when the input angular velocity is constant and uniform by modifying the rate of change of angular displacement of the input disk using a set of non-circular gears. Co-axial input and output can also be achieved.

An automotive transmission comprises first and second gears, planetary gears, and a ring gear. The first gear is rotatable about a first axis. Shafts are radially slidable on the first gear and extend axially parallel to the first axis. The second gear is rotatable about a second axis. The second axis is parallel to, and at a fixed offset from, the first axis. Each of the planetary gears is mounted on and rotatable about a respective one of the shafts. The planetary gears mesh with the second gear. The ring gear is coaxial with the second gear and has teeth that selectively mesh with less than all of the planetary gears at a time. The teeth are adjustable to change a distance from the axis to the teeth to changeably set a gear ratio between the first and second gears.