Abstract: An apparatus for changing the rotational speed of a mechanism includes an input shaft, several planetary gear units, an output rotor, a rotating disc and a casing. The planetary gear units are connected together. The sun gear of the first unit is connected to the input shaft and the carrier of the last unit is connected to output rotor. An internal gear of one of planetary gear units can rotate in the casing but can be stopped by an internal gear stopping device. The input shaft is connected to the rotating disc. The rotating disc can be brought into contact with the output rotor by a disc-contacting device. The disc-contacting device and the internal gear stopping device are driven in a complementary manner. When the internal gear stopping device is excited and the disc-contacting device is unexcited, the output rotor rotates at a low speed level. When the disc-contacting device is excited and the internal gear stopping device is unexcited, the output rotor rotates at a high speed level.

Abstract: A planetary gear includes a middle planetary gear part, a disc part on one side of the planetary gear part having a radius smaller than a radius of the tooth root circle of the planetary gear part and another disc part on another side of the planetary gear part having a radius bigger than a radius of a tooth edge circle of the planetary gear part. An internal gear includes a middle internal gear part, an inner cylindrical part on one side of the internal gear having a radius smaller than a radius of a tooth edge circle of the internal gear part and another inner cylindrical part on another side of the internal gear having a radius bigger than a radius of a tooth root circle of the internal gear part. The planetary smaller disc parts can rollingly engage the smaller inner cylindrical part of the internal gear. The planetary bigger disc parts can rollingly engage the bigger inner cylindrical part of the internal gear. The planetary gear part and two disc parts are unified in a body.

Abstract: A modified planetary gear assembly includes a sun gear, planetary gears, an internally-toothed ring gear and a carrier, and can either transmit or not transmit torque from the sun gear to the carrier. The internally-toothed ring gear has outer peripheries on both sides suitable for being supported by a bearing device and a middle groove on the outer surface having timing teeth shaped around the groove. The peripheries are supported by a bearing device. A stopper device which is movable in a radial direction is mounted at a point around the middle groove. When the stopper device is moved forward to engage with the timing tooth, the internally-toothed ring gear is fixed and torque is transmitted from the sun gear to the carrier. When the stopper device is retracted, the internally-toothed ring gear freely rotates and no torque is transmitted. Thus, there are two states of torque transmission.

Abstract: A planetary gear assembly is disclosed for a planetary gear transmission which also includes a sun gear and a casing. The planetary gear assembly is comprised of a ring-shaped planetary ring gear (7) and two planetary discs (6) supporting the planetary ring gear (7). Each planetary disc (6) has an outer thrust projection (17) and an inwardly projecting boss (18). The inwardly projecting bosses (18) support the inner surface of the planetary ring gear (7). The thrust projections (17) have a greater diameter than the tooth-edge circle of the planetary ring gear 7. A planetary shaft extends through planetary shaft hole (19) of the planetary discs (6) and is fixed by a carrier (4) at both ends. A unitary outer, inner-toothed ring gear (3) has an inner ring gear portion (8) and two outer cylindrical extension portions (9). The outer cylindrical extension portions (9) have a smaller diameter than the tooth-root circle of the outer ring gear portion (8).

Abstract: A planetary transmission (10) is provided having planetary gear assemblies (2) and an unified outer, inner-toothed ring gear assembly (3). The planetary gear assembly (2) engages a sun gear (1) and is comprised of a planetary ring gear (7) sandwiched between front and back thrust discs (6a and 6b). The unified outer, inner-toothed ring gear assembly (3) engages the planetary gear assemblies (2) and is comprised of an outer, inner-toothed annular ring gear (8) part sandwiched between front and back side annular ring parts (9a and 9b). The thrust discs (6a and 6b) are in contact with the side annular ring parts (9a and 9b), and the contact surfaces are complementary. The thrust disc outer diameter (D1) is equal to or, preferably, greater than the planetary ring gear (8) tooth-tip circle diameter (D2). The side annular ring parts (9a and 9b) inner diameter (D3 ) is equal to or, preferably greater than the tooth-bottom circle diameter (D4) of the outer, inner-toothed ring gear (8).

Abstract: All gears have asymmetric side circular parts on both sides. The side circular parts contact with and roll on each other. A planetary gear has a first planetary disc and a second planetary disc as well as a planetary gear ring. The first planetary disc has a smaller disc part smaller than the tooth-root circle. The second planetary disc has a big disc part bigger than the tooth-edge circle. The outer inner-toothed gear has a gear part, a smaller cylindrical part smaller than the tooth-edge circle and a bigger cylindrical part bigger than the tooth-root circle. The sun gear has a sun gear part, a bigger column part bigger than the tooth-edge circle and a smaller column part smaller than the tooth-root circle.After-insertion of sun gear is possible. Abnormal fitting of sun gear is prevented.

Abstract: A runner chopper comprising in combination a driving device, a main shaft (1) that rotates slowly by the action of the driving device, several rotary blades (2) fitted around the main shaft with some distances therebetween, and the same number of fixed blades (3) as the rotary blades (2) which are fixed in the vicinity of the rotary blades (2) wherein either or both the rotary blades (2) and the fixed blades (3) have centripetal slanting edges which cause the inward movement of objects that are sandwiched between the rotary blades (2) and the fixed blades (3).

Abstract: A window washer system for a motor vehicle is disclosed wherein means are provided for warming the window washer liquid. The window washer system includes a tank (5) for storing window washer liquid, a washer liquid pump (6), washer liquid hoses (7), a flexible heat exchanger tube (8) wound around an engine coolant hose (3), and window nozzles (10). As washer liquid is pumped through flexible heat exchanger tube (8), the washer liquid is warmed by heat conducted from hot engine coolant through the walls of coolant hose (3) and through the walls of heat exchanger tube (8). The heat exchanger tube (8) is connected by coupling elements (9) to the washer liquid hoses (7) in line between the washer liquid pump (6) and the window nozzles (10). The heat exchanger tube (8) is preferably made from a thermoplastic material such as nylon. An ear (15) may project from the side of the coupling element (9). The ear (15) has a small slit (16).