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 for to reverse. This uses a scotch-yoke mechanism to convert rotational motion to a linear reciprocating motion. The linear distance of this reciprocating motionstroke 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.

[Object] To propose a novel and improved support apparatus in which the apparatus can be miniaturized more effectively, while also minimizing limitations on the attitude of the apparatus.

[Solution] Provided is a support apparatus including: a drive motor, a link mechanism that, by transmitting motive power output from the drive motor, is extendable and contractable in response to the motive power, and a pair of rotating bodies that act as a variable speed mechanism that outputs the motive power to the link mechanism by a reduction ratio according to an attitude of the link mechanism. At least part of the link mechanism forms a trapezoidal link mechanism.

A gear (10) for a bicycle transmission (20) is described, having an external contour (11) with teeth (12a, 12b) formed thereon, wherein the external contour (11) is defined by a maximum pitch diameter (.sub.max) and a minimum pitch diameter (.sub.min), does not have any axes of symmetry and is formed exclusively with point symmetry with respect to its centre of symmetry (M). The invention was therefore based on the problem of developing a gear (10) which improves the pedaling feel of a bicycle transmission (20). The problem is solved in that the external contour (11) exhibits a change in its curvature at every point.

The present invention discloses a line gear mechanism for rotation-movement conversion, comprising a driving line gear (1) and a driven line gear (2). A stagger angle between an axis of the driving line gear and an axis of the driven line gear is any value from 0 to 180. By a point contact meshing between a driving contact curve of a driving line tooth on the driving line gear (1) and a driven contact curve of a driven line tooth on the driven line gear (2), and by utilizing rotation of the driving line gear (1), it achieves that the driven line gear (2) rotates while moving smoothly. The line gear mechanism for rotation-movement conversion is simple in structure, easy to design, can achieve small displacement of movement, and is especially suitable for the conversion of small machinery from rotation to linear motion.

The invention is referred to a new type gearing system where the gears are involved between them with an angled formation inclined dentures (1). The gears are found inside a housing (4) while from a hole (2) in their center a transmission axis (3) passes through them. Each housing (4) contains one or more inserting holes (5) and exerting holes (6), in result the air that enters the inserting hole to rotate each gear for the arc of the circle, until it exits from the corresponding exertion hole (6). The application of the new type gearing system can also be done in motors and in liquid and gas pumps, as it requires minimum maintenance and can be made in different sizes depending on each application.

A pinion gear, with a varied gear ratio, can be inline with a rack. When the rack moves, the pinion gear can rotate. This rotation can cause an interior of an electrical generator to rotate. Rotation of the interior of the electrical generator can cause an electricity to be produced and outputted.

A drive system for rotating a wheel of an aircraft landing gear is disclosed including a motor operable to rotate a drive pinion via a drive path; and a driven gear adapted to be attached to the wheel so as to be capable of rotating the wheel. The drive system has a drive configuration in which the drive pinion is capable of meshing with the driven gear to permit the motor to drive the driven gear via the drive path. The drive path comprises a first compensating gear mounted on a common drive shaft with the drive pinion so as to be capable of rotating in tandem with the drive pinion, and a second compensating gear which is meshed with the first compensating gear. One of the drive pinion and the driven gear comprises a roller gear having a series of rollers arranged to form a ring, each roller being rotatable about a roller axis, and the other of the dive pinion and the driven gear comprises a sprocket.

The invention relates to a bicycle gearing, comprising: a cylindrical-gear gearing (10), which has a stationary sun gear (11) having a central bearing axis (y.sub.1) extending centrally therein and a planet gear (12), which travels on the sun gear (11) and rotates about a planet-gear bearing axis (y.sub.2); a four-bar linkage (20), which interacts with the cylindrical-gear gearing (10) and which comprises a crank (21), which is fixedly connected to the planet gear (12) and is rotatably connected to a pedal crank (22); and a toothed wheel (30), by means of which a traction means (31) can be driven. The problem addressed by the invention is that of improving a bicycle gearing of the type in question in such a way that a rounder pedaling feel is perceived by the bicycle rider. The problem is solved according to the invention in that the toothed wheel (30) has an oval shape.

Disclosed is a gearbox having a central shaft (1), which is rotatably mounted relative to a stationary frame element (2) by means of at least one central shaft bearing (3), a first sun gear (4a) arranged concentrically around the central shaft (1) and fixedly secured to the frame element (2), a power transmission means (5) that is fixed in relation to the central shaft (1), and at least one first gearbox assembly (6a) rotating relative to the frame element (2) and comprising: a support plate (7), the first section (7a) of which is non-rotatably connected to the central shaft (1) and on the second section (7b) of which a planetary gear (8) is mounted by means of a planetary gear bearing (9), wherein the planetary gear (8) meshes with the first sun gear (4a) and a crank arm (10) engages rigidly with the planetary gear (8); and a driving crank (11), on which the crank arm (10) is hingedly mounted by means of a driving crank-crank arm bearing (12) and which is supported relative to the support plate (7) by means of a kinematic coupling means (13). The aim of the invention was to provide a gearbox which has the most compact dimensions possible in the axial direction of the central shaft and in which the rotating driving crank (11) operates with as near to zero backlash as possible. According to the invention the aim is achieved by a gearbox in which the kinematic coupling means (13) is a swing arm (14).

A drive system for rotating a wheel of an aircraft landing gear is disclosed including a motor operable to rotate a drive pinion via a drive path; and a driven gear adapted to be attached to the wheel so as to be capable of rotating the wheel. The drive system has a drive configuration in which the drive pinion is capable of meshing with the driven gear to permit the motor to drive the driven gear via the drive path. The drive path includes a first compensating gear mounted on a common drive shaft with the drive pinion so as to be capable of rotating in tandem with the drive pinion, and a second compensating gear which is meshed with the first compensating gear. One of the drive pinion and the driven gear includes a roller gear having a series of rollers arranged to form a ring, each roller being rotatable about a roller axis, and the other of the dive pinion and the driven gear comprises a sprocket.