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| Number | Title | Issue Date |
| 7077771 | Automatic stepless speed-changing mechanism An automatic stepless speed-changing mechanism mainly includes a pivotal shaft, a plurality of mounting discs mounted along the pivotal shaft and provided with radially extended guide rails, a plurality of axial rods separately axially extended through the guide rai... | 07/18/2006 |
| 7033293 | Expandable pulley An expandable pulley. The expandable pulley comprises a plurality of belt blocks arranged about an axis of rotation. Each belt block bears upon a radial surface extending normally to the axis of rotation. Another surface of each belt block bears upon a conical membe... | 04/25/2006 |
| 6893369 | Continuously variable diameter drive wheel and continuously variable ratio transmission made therewith A drive wheel for pulling a chain has a diameter that can be changed continuously as the drive wheel rotates. The drive wheel has a drive shaft and there are at least 2 chain-engaging means (teeth or blades) positioned around the drive shaft for engaging a chain. Th... | 05/17/2005 |
| 6152844 | Variable diameter pulley for a transmission A rotary power source and a continuously variable transmission are coupled together. The continuously variable transmission includes a first shaft, a first pulley coupled to rotate with the first shaft, a second shaft, a second pulley coupled to rotate wi... | 11/28/2000 |
| 5637046 | Variable ratio transmission system and clutch mechanism therefor A variable ratio chain-belt transmission for use in a vehicle, includes a pair of variable ratio pulleys having a plurality of pins which are lined in a plurality of circles, a chain-belt engaging with both variable ratio pulleys. Different sized pulleys ... | 06/10/1997 |
| 5054801 | Bicycle with belt drive A belt drive for bicycles with a drive pulley rotated by the pedals of the bicycle and a driven pulley for driving the rear wheels of the bicycle. A V-belt connects the pulleys. Each pulley is made in sections with each section being an arc of a circle. T... | 10/08/1991 |
| 5041061 | Variable ratio drive system A variable ratio drive mechanism which operates to adjust the path of an endless drive belt in response to a remotely located control input. A plurality of circumferentially spaced sheave segements are respectively mounted in a plurality of radially exten... | 08/20/1991 |
| 4961719 | Variable drive transmission A drive transmission for work producing mechanism, such as a bicycle or other vehicle, in which a carrier member is mounted on a rotatable crank shaft and has a plurality of spaced, pivotally mounted segments, with each segment carrying a rotatable drive ... | 10/09/1990 |
| 4938732 | Continuously variable transmission system having variable diameter pulley assemblies responsive to axially directed forces A continuously variable transmission having a variable diameter pulley assembly. The variable diameter pulley assembly has an array of belt engaging elements arranged in a circular pattern having a diameter variable as a function of the relative rotationa... | 07/03/1990 |
| 4875894 | Continuously variable transmission A transmission is described which provides a continuously and infinitely variable number of ratios within a finite range of gear ratios. The transmission comprises two rotary disk assemblies, one of which is driven by an input shaft, and the other of whic... | 10/24/1989 |
| 4836046 | Automatic bicycle transmission An automatic bicycle transmission includes in combination a sprocket wheel assembly which is responsive to the input torque applied at the pedals, a chain takeup assembly to maintain the chain taut under all operative positions of the sprocket wheel assem... | 06/06/1989 |
| 4832660 | Variable ratio drive mechanism This invention relates to an apparatus for positioning a bearing surface relative to a track. The invention, in one embodiment, includes a rotatably mounted drive mechanism which is provided with a plurality of radially oriented tracks. The drive mechanis... | 05/23/1989 |
| 4824419 | Flat belt continuously variable transmission with geared speed ratio control system A flat belt CVT is disclosed in which a geared control system is employed to establish and maintain the effective diameter of each pulley assembly by determining the mutual angular relationship between sets of inner and outer guideway disks provided with ... | 04/25/1989 |
| 4820244 | Variable ratio drive mechanism The described invention includes a rotatably mounted drive mechanism which is provided with a plurality of radially oriented tracks. The drive mechanism preferably comprises a pair of opposed drive disks with colinear radial tracks having tooth-like forma... | 04/11/1989 |
| 4816008 | Variable-ratio transmissions, separately and in bicycles Drive mechanism, particularly for use with a bicycle, of the type having variable diameter drive and driven members connected by an endless belt which engages adjustable segments on the members. Through a control member the drive ratio can be adjusted to ... | 03/28/1989 |
| 4810235 | Variable transmission with an integral shifter A variable transmission with an integral shifter, particularly suitable for a bicycle, having a variable-sprocket mounted on an axle having crank-arms. The variable-sprocket comprises a drive-flange and a indexing-flange, a pair of sprocket-segment-planet... | 03/07/1989 |
| 4810234 | Continuously variable transmission A continuously variable transmission employing a flat belt extending between driving and driven pulley assemblies, each having a circumferential array of radially adjustable belt engaging elements, is disclosed in conjunction with a control system. The ra... | 03/07/1989 |
| 4787879 | Fifteen speed variable radius bicycle transmission A fifteen speed bicycle transmissiion wholly located on the rear driving wheel except for a manual control mounted elsewhere, e.g. on the handle bar, and including two closely arranged circular co-axial plates on the hub, one plate being a drive plate wit... | 11/29/1988 |
| 4781663 | Torque responsive automatic bicycle transmission with hold system An automatic transmission for use on a bicycle is mounted on a bracket that is connected to the rear axle of the bicycle. A first chain connects the chain wheel with a sprocket fixed for rotation with the drive pulley of the transmission. A second chain t... | 11/01/1988 |
| 4759739 | Expansible chainwheel variable ratio mechanical drive A variable ratio transmission includes an input and an output, having an expansible chainwheel. A first drive path is provided to rotate the chainwheel and a second drive path is provided to increase the diameter of the chainwheel upon application of a fi... | 07/26/1988 |
| 4743222 | Speed control device for a bicycle A speed control device for a bicycle having a positioning mechanism provided with a first positioning portion having engaging portions corresponding in number to the speed change stages, a second positioning portion having engaging portions larger in numb... | 05/10/1988 |
| 4740190 | Variable ratio bicycle chain drive A variable ratio bicycle chain drive uses a variable radius sprocket assembly having a number of chain engagement elements mounted to worm gears for movement along radial channels. Radius changer gears, such as star wheels, are mounted on at least some wo... | 04/26/1988 |
| 4717369 | Incrementally variable transmission An incrementally variable transmission, particularly suitable for a bicycle, having a variable-sprocket mounted on an axle having crank-arms. The variable-sprocket comprises a drive-flange and a indexing-flange, a pair of sprocket-segment-planets and at l... | 01/05/1988 |
| 4696662 | Variable-speed drive unit A variable-speed drive unit for a chain drive comprising a drive wheel (12) which contains a series of radially mounted threaded rods (14) which pass through internally threaded blocks (22), upon which are selectively mounted free wheeling sprockets (28) ... | 09/29/1987 |
| 4645475 | Incrementally variable bicycle transmission An incrementally variable transmission, particularly suitable for a bicycle, having a variable-sprocket which comprises: A drive-flange and an indexing-flange mounted on an axle with a pair of sprocket-segment-planets and at least a pair of idler-planets ... | 02/24/1987 |
| 4608034 | Variable speed ratio drive In an automatic variable speed transmission, expansible pulleys function to change the speed ratio between driving and driven shafts. The pulleys are constructed in segments or arms that are pivoted at one end to swing outwardly. Each arm includes a V-sha... | 08/26/1986 |
| 4521207 | Incrementally variable transmission An incrementally variable transmission, particularly suitable for a bicycle, having a variable sprocket which comprises: A drive flange and an indexing flange mounted on an axle with a pair of sprocket-segment-planets and at least a pair of idler-planets ... | 06/04/1985 |
| 4373926 | Automatic transmission having a continuously variable drive ratio An automatic transmission comprises a first rotating assembly coupled via a bias member to a second rotating assembly. The second rotating assembly varies its effective diameter in response to the torque applied to the transmission. The bias member, e.g.,... | 02/15/1983 |
| 4325702 | Adjustable pulley A pulley with a variable working diameter, including two coaxial disks which are rotatable relative to one another, of which the one has a radial and the other at least one spiral-shaped guide groove. A plurality of support members with a segmentlike form... | 04/20/1982 |
| 4259874 | Transmission mechanism having a variable transmission ratio The mechanism comprises at least one driving shaft and at least one driven shaft. A first pulley is keyed to rotate with the driving shaft and has a cheek which is fixed in translation and a cheek which is movable in translation relative to the first chee... | 04/07/1981 |
| 4167124 | Variable-speed chain drive unit A drive unit for varying the transmission ratio between two parallel rotatable shafts is provided with a disk mounted on each shaft for rotation therewith, the disks being formed with a plurality of radial grooves in which respective bearings are provided... | 09/11/1979 |
| 4068539 | Variable-ratio transmission A transmission capable of providing an infinitely variable drive ratio between a predesigned minimum and maximum ratio, either automatically or manually variable.... | 01/17/1978 |
| 3995508 | Automatic bicycle transmission The drive ratio of a bicycle transmission is automatically varied through a radially contractible drive chain sprocket wheel assembly that is drivingly coupled to a pedal driven, drive ratio control disk. A force transmitting spring couples the control di... | 12/07/1976 |
| 3994180 | Expansible sprocket device In a variable diameter driving sprocket for a chain drive change speed device comprising a plurality of circumferentially spaced radially movable toothed elements mounted on said driving sprocket over which the chain is threaded; a means to move the tooth... | 11/30/1976 |
| 3938403 | Multiratio power transmitting device A multiratio drive which comprises a drive plate mounted for rotation upon an axis and means for drivingly coupling the drive plate to a source of motive power. A plurality of driven elements are mounted to the drive plate for sliding movement therewith i... | 02/17/1976 |
