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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7351169 | Utility machinery and associated control arrangements A power transmission device for utility machinery is disclosed, the device including: a) a sleeve supporting a first sheave member having a first face; b) a hub received through the sleeve and moveable axially in relation thereto, the hub supporting a second sheave ... | 04/01/2008 |
| 7311624 | Apparatus for controlling speed of a water pump For enhancement of heating performance of a vehicle, operating speed of a water pump of an engine is varied in accordance with engine operation conditions, so a speed of a coolant temperature increase can be accelerated when needed. ... | 12/25/2007 |
| 7235026 | Utility machinery and associated control arrangements A method is provided for bearing a pitch or grip of a belt running between a pair of opposing faces of respective first and second sheave members of a power transmission device. The method includes moving the second sheave member axially in relation to the first she... | 06/26/2007 |
| 7191866 | Electric power steering apparatus An electric power steering apparatus includes a speed reducing mechanism for decelerating the rotation of a rotatable shaft in an electric motor and a converting mechanism for converting the output rotation of the speed reducing mechanism into the axial movement of ... | 03/20/2007 |
| 7172523 | Automatic mechanically controlled continuously-variable-ratio drive A continuously-variable-ratio drive, having an input shaft; a flywheel integral with the input shaft; a drive pulley idle with respect to the input shaft and defined by two half-pulleys defining a groove of variable size for a V belt; and a centrifugal control assem... | 02/06/2007 |
| 7059982 | Utility machinery and associated control arrangements A power transmission device for utility machinery is disclosed, the device including: a) a sleeve supporting a first sheave member having a first face; b) a hub received through said sleeve and moveable axially in relation thereto, said hub... | 06/13/2006 |
| 7004860 | Belt type infinite variable-speed drive A belt type infinite variable-speed drive using a ball-screw mechanism is compact and noise-free. A nut of the ball-screw mechanism is fixed to a casing and a threaded shaft is rotatably coupled to a movable pulley member through a ball bearing so that ball circulat... | 02/28/2006 |
| 6962543 | Continuously variable belt drive system A continuously variable belt drive system includes a driving pulley assembly, a driven pulley assembly and a V-shaped belt engaged to transfer rotary power therebetween. The driven pulley assembly includes a ratio adjustment mechanism that adjusts the position of a ... | 11/08/2005 |
| 6949854 | Method and apparatus for a continuously variable-ratio transmission A method and apparatus for providing a continuously variable transmission (CVT) is described. The CVT comprises permanent magnets to couple power, a coefficient of coupling controlled by an electronic servo control loop. Wherein torque multiplication is achieved by ... | 09/27/2005 |
| 6926632 | Dual drive continuously variable transmission A continuously variable transmission has a first shaft supporting two first pulleys. The two first pulleys each comprise a fixed disk portion and a moveable disk portion whereby axial movement of the moveable disk portions along the first shaft relative to the fixed... | 08/09/2005 |
| 6729985 | Continuously variable reversible transmission A continuously variable reversible transmission including an input shaft (2), a housing (1), an input arm (4), first and second CVT shafts (5.6), a fixed input wheel (35), a ratio selector mechanism, an overall output wheel (36 | 05/04/2004 |
| 6705961 | Variable speed transmission and electronic speed control therefor A variable speed transmission including a housing, a drive shaft having an axis of rotation and rotatably supported in the housing, an output shaft having an axis of rotation and rotatably supported in the housing, a first pulley and a second pulley both having a co... | 03/16/2004 |
| 6398678 | Speed adjusting device for a drill A speed adjusting device for a drill includes two pulley assemblies between which a belt is connected. Each pulley assembly has a fixed disk and a movable disk so that an effective diameter that the belt engages the pulley assembly can be changed by adjus... | 06/04/2002 |
| 6332856 | Continuously variable transmission A continuously variable transmission wherein a driving pulley comprising a fixed driving pulley piece and a movable driving pulley piece is mounted on a driving shaft, a driven pulley comprising a fixed driven pulley piece and a movable driven pulley piec... | 12/25/2001 |
| 6190274 | Transmission In a pair of conical disks (pulley halves) of an infinitely variable cone-pulley transmission, in the case where the conical disks are spaced apart, a pressure compartment through channels formed in a shaft A connects to a pressure chamber that serves to ... | 02/20/2001 |
| 6142898 | Non-stage transmission for vehicles and lawn mowing tractor using same In a continuously variable speed transmission T in which one of two power transmission paths connecting to a planetary gear mechanism 12 is formed of a belt variable speed mechanism 9, the other power transmission path is formed of a belt power transmissi... | 11/07/2000 |
| 5961408 | Device for controlling a CVT The proposal is for a device for controlling a CVT (3) driven by a drive unit (1) in which an emergency running unit is activated on the breakdown of the electronic control device (15). It sets a constant compression or power ratio between the primary (S1... | 10/05/1999 |
| 5848949 | Infinitely variable speed transmission In an infinitely variable speed transmission T of this invention, a belt variable speed mechanism 4 is arranged between a first rotatable shaft 1 and a second rotatable shaft 2. A planetary gear mechanism 81 is provided which comprises a first, a second, ... | 12/15/1998 |
| 5836843 | Brace for outer ends of variable pulley drive A pulley brace for mounting between a variable diameter driving pulley which is belt-coupled to a variable diameter driven pulley, the pulley brace consisting of an elongated body having first and second body ends and a central body portion therebetween, ... | 11/17/1998 |
| 5766105 | Continuously variable transmission capable of torque control A continuously-variable-ratio transmission ("CVT") of the band-and-sheave type capable of "torque control", so that what the operator demands, by movement of the accelerator pedal or other control member, is a particular driving torque applied to the rati... | 06/16/1998 |
| 5667449 | Fluid-controlled bicycle transmission A multi-speed transmission is provided which employs inflatable diaphragms to alter drive ratio. Particularly applicable to bicycles, the transmission is composed of a diaphragm mounted at the pedal axis and another mounted at the drive wheel axis, with a... | 09/16/1997 |
| 5405158 | Variable ratio belt drive system A drive system suitable for a bicycle and capable of providing various drive ratios comprising first and second pairs of conical members, each pair including primary and secondary conical members, both of which are rotatable about a first or second transv... | 04/11/1995 |
| 5374221 | Positive variable drive transmission unit/system A set of interlocking sheaves having fan-shaped protruding curved surfaces of different conical angles and capable of varying their degree of interlock is used in conjunction with a drive line to provide a variable drive transmission system having a posit... | 12/20/1994 |
| 5339495 | Coiler and autoleveller This invention relates to a coiler using tongue and groove rollers preferably for measuring sliver thickness and guiding sliver emerging from between these rollers, using guide means such as a pair of calender rollers driven for rotation in the same conve... | 08/23/1994 |
| 5282773 | Dual range variable speed transmission A variable diameter belt type power transfer assembly having a drive sheave and a driven sheave, both of which are adjustable and include a pair of opposing coaxial flanges, one of which is axially movable relative to the other, is disclosed wherein both ... | 02/01/1994 |
| 5191755 | Combine harvester with dual range variable speed blower A variable diameter belt type power transfer assembly having a drive sheave and a driven sheave, both of which are adjustable and include a pair of opposing coaxial flanges, one of which is axially movable relative to the other, is disclosed wherein both ... | 03/09/1993 |
| 5052990 | Transmission using ball and screw mechanical actuators A transmission provided in a power transmitting system and having at least a transmission mechanism and a forward/reverse rotation changeover mechanism controlled on the basis of signals from a control section. The transmission includes a plurality of mec... | 10/01/1991 |
| 4952201 | Mechanical power transmission A continuously variable power transmission comprising rotatable input shaft attachable to rotating power means; rotatable output shaft providing driving axle means; and planetary power transmission train interconnecting said input shaft and said output sh... | 08/28/1990 |
| 4950208 | Variable ratio power transmission A variable ratio power transmission comprising a variator and a geared drive operable in parallel along respective loading paths which unite at at least one gearset. In a first embodiment, the variator is rewindable between its ratio extremities of operat... | 08/21/1990 |
| 4781656 | Variable speed power transmission pulley and system A variable speed power transmission pulley and system are disclosed. The system includes a pair of spaced shafts each having a pulley keyed thereto, the effective diameter of which is adjustable. A flat band belt is entrained about annular elastomeric mem... | 11/01/1988 |
| 4768997 | Belt drive system for dual input transmissions/transaxles A two belt drive system is disclosed for lawn and garden tractors and other vehicles especially of the type including a variable speed transmission/transaxle having a constant speed rotational input, a variable speed rotational input, and an output speed ... | 09/06/1988 |
| 4735598 | Continuously variable V-belt transmission Pulleys are provided with load cam mechanisms which exert axial forces corresponding to transmitted torque, and actuator means such as ball screw mechanisms which shift the movable sheaves of both pulleys in axial direction, wherein the axial forces occur... | 04/05/1988 |
| 4722719 | Adjustable belt drive mechanism A compact and rugged belt drive mechanism includes a hydraulically controlled actuator located generally between first and second variable pulley assemblies individually having a movable pulley disc and a fixed pulley disc in order to controllably positio... | 02/02/1988 |
| 4714451 | V belt stepless variable transmission A V belt stepless variable transmission provided with a driving pulley comprising a stationary conical disc fixed to a drive shaft and a movable conical disc axially movable with respect to the drive shaft, a driven pulley comprising a stationary conical ... | 12/22/1987 |
| 4650442 | Continuously variable transmission A continuously variable transmission has a driving pulley and a driven pulley each of which has a V-shaped groove in which sits the belt. The belt comprises a base portion of a rubber-like compound in which are imbedded a plurality of transverse metal pin... | 03/17/1987 |
| 4584909 | Hydraulic control system for continuously variable V-belt transmission A continuously variable V-belt transmission has a change-direction gearing upstream of a drive pulley, and a hydraulic control system. The hydraulic control system comprises a shift control valve for controlling the distribution of fluid pressure between ... | 04/29/1986 |
| 4515576 | Variable speed transmission A variable speed transmission (20) includes a sprocket (46) mounted on a first shaft (22) for rotation therewith. A variable effective diameter pulley (30) is mounted for rotation on a driven shaft (32). The pulley includes a pair of pulley halves (80, 82... | 05/07/1985 |
| 4504248 | Variable and reversible transmission A variable and reversible transmission, in which two co-linear shafts are provided with adjustably-locatable generally semi-spherical drive components or heads, with control means for changing and holding selected adjustments of the heads; and the heads d... | 03/12/1985 |
| 4395248 | Multi-speed transmission A multi-part sprocket and a multi-speed transmission comprising at least a pair of the sprockets, the sprockets each comprising an external toothed drive member surrounded by a two part externally toothed ring member, one part of which is axially movable ... | 07/26/1983 |
| 4196641 | Tandem-belt variable-speed transmission A tandem-belt variable-speed transmission has a pair of shafts each provided with a pair of outer disks flanking an intermediate disk forming therewith a pair of nips each receiving a respective belt. One of each of the outer disks is fixed on the shaft a... | 04/08/1980 |
