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CONTROL FOR VARIABLE INPUT TO OUTPUT SPEED-RATIO

Subclass of:

474 - Endless belt power transmission systems or components

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
474078000 Including belt shiftable axially from one to another surface of stepped pulley or coaxial pulleys of different diameter 68
474070000 Condition responsive (e.g., responsive to speed, load, etc.) 10
474073000 Including separate belt on each of coaxial pulleys selectively engaged in drive train 3
20100130319BELT AND CHAIN DRIVE WITH KIDNEY-SHAPED TRACTION MEANS - A belt and chain drive for vehicles or for use in drive technology with an input shaft and an output shaft supported on a frame, the input shaft and the output shaft project out of the frame, with the following features: a) gear transmissions with gear wheels, which are embodied as belt and chain drives, are located between the input shaft and the output shaft, b) all of the gear wheels are constantly in rotation during operation, c) the gear transmissions located between the input shaft and the output shaft are embodied as belt and chain drives with toothed belts as traction mechanisms and with pulleys as gear wheels, d) the traction mechanism are reinforced with aramide, Kevlar, carbon fibers or other fibrous materials, is characterized in that e) the traction mechanism is pressed into a kidney-like shape onto the pulleys by at least one component during no-load rotation, and that under the effect of load this component does not touch the traction mechanism, and f) the kidney-like shape of the traction mechanism during no-load rotation is formed by a convex curvature of the driving side and by a concave curvature of the slack side, and g) the kidney-like shape of the traction mechanisms under load is formed by a straight shape of the driving side and by an intensified concave curvature of the slack side.05-27-2010
20100120563Damped isolator - A damped isolator comprising a first hub, a first pulley connected to the first hub, a bearing carrier connected to the first hub, an elastomeric member engaged with the first hub, a one-way clutch engaged with the elastomeric member, a bearing received by the bearing carrier, a second hub engaged with the one-way clutch and the bearing, and a second pulley connected to the second hub.05-13-2010
20090176608Overrunning Alternator Decoupler Pulley with Bare Wire Spring and Grease Lubrication - A decoupler assembly is provided for a system that employs an endless power transmitting element. The decoupler includes a one-way clutch with a wrap spring and a torsion spring that are disposed between a pulley, which is engaged to the endless power transmitting element, and a hub. The one-way clutch permits overrunning of a driven or output one of the pulley and the hub, whereas the torsion spring stores and releases energy to attenuate the response of the one-way clutch in a manner that provides improved durability of an interface between the wrap spring and the pulley.07-09-2009
474071000 Cyclical or sequential (e.g., machine controlled, etc.) 3
20120252614TREADLE-DRIVE ECCENTRIC WHEEL TRANSMISSION WHEEL SERIES WITH PERIODICALLY VARIED SPEED RATIO - The present invention is structured by using one or both of an active wheel and a passive wheel being composed of an eccentric transmission wheel and being combined with a synchronous transmission belt for forming an eccentric wheel transmission wheel series, so that in the reciprocal treadle performed by the human's feet, when the feet input forces at different angles from the treadle shafts of the treadles to an active wheel shaft combined on the active wheel through cranks, the active wheel forms different transmission speed ratios relative to the passive wheel according to the treadle angle.10-04-2012
20120252613TREADLE-DRIVE ELLIPTICAL WHEEL TRANSMISSION WHEEL SERIES WITH PERIODICALLY VARIED SPEED RATIO - The present invention is structured by using one or both of an active wheel and a passive wheel to be constituted by a bimodal elliptical wheel, so that in the reciprocal treadle performed by the human's feet, when the feet input forces at different angles to an active wheel shaft combined on the active wheel through cranks and treadle shafts of the treadles, the active wheel forms different transmission speed ratios relative to the passive wheel according to the treadle angle.10-04-2012
20130130851TREADLE-DRIVE ECCENTRIC WHEEL TRANSMISSION WHEEL SERIES WITH PERIODICALLY VARIED SPEED RATIO - The present invention is structured by using one or both of an active wheel and a passive wheel being composed of an eccentric transmission wheel and being combined with a synchronous transmission belt for forming an eccentric wheel transmission wheel series, so that in the reciprocal treadle performed by the human's feet, when the feet input forces at different angles from the treadle shafts of the treadles to an active wheel shaft combined on the active wheel through cranks, the active wheel forms different transmission speed ratios relative to the passive wheel according to the treadle angle.05-23-2013
474083000 Including mechanism for shifting belt axially on spaced pulleys with tapering drive face 3
20130090197LARGE-TORQUE CHAIN-GUIDE TYPE CONSTANT RATIO/CONTINUOUSLY VARIABLE TRANSMISSION - A large-torque chain-guide type constant ratio/continuously variable transmission is disclosed. The transmission comprises transmission rollers (A, B), an endless transmission chain or belt (C) and two chain guiders (D, E) respectively arranged beside the two transmission rollers. Each chain guider comprises n groups of grooved-pulleys, and each group comprises m grooved-pulleys. Each grooved-pulley rotates freely around a grooved-pulley axis, and an angle α is formed between the axis of at least one grooved-pulley in each group of grooved-pulleys and a roller axis of the transmission roller matched with the same grooved-pulley. The angle α enables the chain entering the chain guider and the chain leaving the chain guider to move a certain axial distance, i.e. a chain distance, on the transmission rollers, wherein the chain distance is required to be larger than the width of the chain or the belt. The endless transmission chain passes sequentially through the pulley groove of at least one grooved-pulley in one group and the driving roller under the guidance of the chain guider, and is guided to a driven roller after winding n circles around both the chain guider and the driving roller. Whereafter, the transmission chain passes sequentially through the pulley groove of at least one grooved-pulley in one group and the driven roller under the guidance of the chain guider, and returns to the driving roller to be closed after winding n circles around both the chain guider and the driven roller. The transmission has small size and compact structure, and can output a large torque.04-11-2013
20130023366Methods and Devices for Improving the Performance of CVTs - Methods and devices for improving the performance of CVT's (Continuous Variable Transmissions) that utilize a cone with one torque transmitting member, a cone with two opposite torque transmitting members, cone with one tooth (single tooth cone), and a cone with two opposite teeth. Said methods and devices include but are not limited to: a mechanism for changing the axial position of a cone quickly and accurately (see FIG. 01-24-2013
20130130854Additional Methods and Devices for Improving the Performance of CVTs - Methods and devices for improving the performance of CVT's (Continuous Variable Transmissions) that utilize a cone with one torque transmitting member, a cone with two opposite torque transmitting members, cone with one tooth (single tooth cone), and a cone with two opposite teeth. Said methods and devices include but are not limited to: a mechanism for changing the axial position of a cone quickly and accurately (see FIG. 05-23-2013
474072000 Including intermeshing gears in one drive train 2
20100125015DRIVING FORCE TRANSMITTING APPARATUS - A drive transmission apparatus for transmitting a driving force to a rotatable member includes a driving source; a drive pulley for receiving a driving force from the driving source; a driven pulley; a belt, extending around the drive pulley and the driven pulley, for transmitting the driving force from the drive pulley to the driven pulley; a driving gear for receiving a driving force from the driving source; a driven gear for receiving the driving force of the driving gear; a drive transmitting shaft, provided with the driven pulley and the driven gear, for transmitting the driving force to the rotatable member; a drive transmission mechanism, provided between the driven gear and the drive transmitting shaft, for transmitting the driving force in a rotational direction from the driven gear to the drive transmitting shaft when an angular speed of the driven pulley is lower than an angular speed of the driven gear.05-20-2010
20110160012VEHICLE TRANSMISSION HAVING CONTINUOUSLY VARIABLE GEAR RATIOS - A vehicle transmission having continuously variable transmission ratios including an input shaft and an intermediate shaft. A first conical disk pair is disposed on a first shaft and a second conical disk pair is disposed on a second shaft. A belt connects the disk pairs. An intermediate gear that can be rotatably engaged with the first shaft, and an output gear, are rotatably supported on the intermediate shaft. A connecting gear is non-rotatably disposed on the intermediate shaft. A first force transmitting device is disposed between the input shaft and intermediate shaft, a second force transmitting device is disposed between the input shaft and the intermediate gear, a third force transmitting device is disposed between the intermediate gear and output gear, and a fourth force transmitting device is disposed between the intermediate shaft and the output gear. At least one of the force transmitting devices is a freewheel.06-30-2011
Entries
DocumentTitleDate
20110183793Pedal Driven Apparatus Having a Motor - A hybrid bicycle is provided which is manually propelled, but may include a motor unit for assisting forward propulsion of the bicycle. The bicycle has a control system for providing a control input for another component of the bicycle. Where that component comprises the motor, the control input is for increasing drive power applied by the motor unit to said bicycle. Where the component is a continuously variable transmission (CVT) for the bicycle, the control input is for continuously varying the gearing ratio of the CVT. Located adjacent a drive sprocket is a moveable plate member. The plate member and the drive sprocket are mounted for rotation about an axis of rotation of a pedal spindle, although the sprocket is not fixed for rotation with the pedal spindle. The drive sprocket is loosely coupled to the plate member with the plate member being moveable relative to the sprocket by a limited distance in a rotational direction. The plate member acts on a lever mechanism when it is moved relative to said drive sprocket such that any movement of the plate member results in an axial movement of an actuator member which triggers the control system to generate the control input in response to the amount of any movement of the plate member relative to the sprocket.07-28-2011
20100099526Belt type continuously variable transmission - A belt type continuously variable transmission includes a primary shaft and a secondary shaft, wherein the primary shaft is supported on a case via a first rolling element bearing, and the secondary shaft is supported on the case via a second rolling element bearing, the case is formed with a bolt hole at each of an even number of locations in a region separate from a shaft center plane, which is a plane that passes through a shaft center of the primary shaft and a shaft center of the secondary shaft, and first and second stopper plates that each hold down outer races of the first and second rolling element bearings are fixed to the case by bolts mounted in the bolt holes.04-22-2010
20120252612DEVICE AND METHOD FOR CONTROLLING A BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION FOR A VEHICLE - A vehicle belt-type continuously variable transmission expands the operating range in which belt slip control is permitted with maintained estimated accuracy of a belt slip condition, to reduce drive energy consumption owing to a reduction in belt friction. It includes a primary pulley and a secondary pulley around which a belt is wound to control gear ratio by controlling primary and secondary hydraulic pressures, a belt slip control means for controlling secondary hydraulic pressure according to a phase difference between oscillation components due to oscillation included in an actual gear ratio and in an actual secondary hydraulic pressure, and a transmission speed limiting means for determining whether or not to limit vehicle acceleration according to a predetermined acceleration limit permitting condition and limiting a transmission speed to less than a predetermined value when determining to limit the vehicle acceleration.10-04-2012
20120258825DEVICE AND METHOD FOR CONTROLLING A BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION FOR A VEHICLE - A vehicle belt-type continuously variable transmission expands the operating range in which belt slip control is permitted with maintained estimated accuracy of a belt slip condition, to reduce drive energy consumption owing to a reduction in belt friction. It includes a primary pulley and a secondary pulley around which a belt is wound to generate a belt clamping force according to an input torque from an engine by controlling a secondary hydraulic pressure, a belt slip control means for controlling the secondary hydraulic pressure according to a phase difference between oscillation components due to oscillation included in an actual gear ratio and in an actual secondary hydraulic pressure, and an input torque change speed limiting means for determining whether or not to limit vehicle acceleration according to a predetermined acceleration limit permitting condition and limiting the change speed of the input torque to less than a predetermined value when determining to limit the vehicle acceleration.10-11-2012
20100203990Continuously Variable Transmission - A continuously variable transmission comprises an input shaft and an output shaft, a drive wheel, a toothed wheel or a chain wheel, an endless sleeve, a ring wheel, at least one linking member, wedge teeth or a chain, wherein the drive wheel is provided with an annular recess in which a plurality of reversal wedge teeth run, and the wedge teeth are connected with a head portion of the linking member connected with the ring wheel, the spread of axles between the drive wheel and the ring wheel is adjusted via the swinging of the endless sleeve; and with the aid of the locking and releasing operations of the wedge teeth, the linking members are urged to drive the ring wheel, whereby changing the input and output transmission ratio. The continuously variable transmission can be used in a bicycle, wherein the spread of axles between the ring wheel and the drive wheel can be adjusted by regulating a wire, and the magnitude of speed variation is not restricted, the variation range is large, and the power could be synchronously input during the speed variation.08-12-2010
20120100945POWER TRANSMISSION MECHANISM - The present power transmission mechanism comprises: a first rotation member mounted integrally rotatably on the rotation shaft of a drive apparatus; a second rotation member rotatable integrally with or relative to the first rotation member; an elastic member interposed between the first and second rotation members which, when the first and second rotation members rotate relative to each other, absorbs a rotation difference between them; and, a switching portion which includes a mass member mounted on one of the first and second rotation members and rotatable integrally therewith, and an energizing member for energizing the mass member in a direction where it can be contacted with the other of the first and second rotation members. In the switching portion, when the number of rotations of the rotation shaft is a given number of rotations or less, the mass member is contacted with the other rotation member due to the energizing force of the energizing member to generate a frictional force between their contacted surfaces, thereby preventing the relative rotation between the first and second rotation members. And, when the number of rotations of the rotation shaft exceeds a given number of rotations, due to a centrifugal force generated from the rotation of the rotation shaft, the mass member is shifted against the energizing force of the energizing member and is separated from the other rotation member, thereby allowing the relative rotation between the first and second rotation members through the elastic member.04-26-2012
20130130850Accessory Drive and Engine Restarting - A method for controlling a drive system includes driveably connecting an engine to a variator, using a pulley to transmit rotating power from an electric machine through a gearset that increases speed of an input of the variator relative to a speed of the pulley, controlling a speed ratio of the variator, and transmitting power through the gearset and variator to the engine.05-23-2013

Patent applications in class CONTROL FOR VARIABLE INPUT TO OUTPUT SPEED-RATIO

Patent applications in all subclasses CONTROL FOR VARIABLE INPUT TO OUTPUT SPEED-RATIO