Abstract: The present invention relates to a sectional lifting door system. When the system is in normal operation, a door operator drives a cable drum to wind or unwind a cable for lifting or lowering slats. During a process of lowering the slats, if the slats is stopped or slowed unexpectedly (e.g. the slats hit an obstacle below), the door operator is disconnected from a shaft automatically. At this time, even if the door operator is still activated, the shaft does not rotate, the cable drum does not unwind the cable so that a certain tension force can be maintained on the cable and that the cable is prevented from loosening from the drum, thereby preventing the slats from falling off. Also, it can avoid the situation that the weight of the slats is completely applied to the obstacle because the cable drum continuously unwinds the cable.

Abstract: A vehicle power transmission device includes: a continuously variable transmission including a primary pulley, a secondary pulley, and a transmission belt wound between the primary pulley and the secondary pulley; a belt running clutch of hydraulic type for transmitting power to the continuously variable transmission; and a hydraulic control circuit controlling the continuously variable transmission and the belt running clutch. The hydraulic control circuit includes a fail-safe valve switching a communication destination of an oil supply passage for supplying a hydraulic fluid to the belt running clutch to one of a first oil passage supplied with a control hydraulic pressure and a second oil passage supplied with a hydraulic pressure higher than the control hydraulic pressure, the fail-safe valve connecting the oil supply passage with the second oil passage when the fail-safe valve is switched to a failure position. The second oil passage is provided with an orifice.

Abstract: A drive device having a main drive device, a gearing, a switchable clutch, at least one hydraulic pump, and a gearing output shaft is started with low wear by providing an auxiliary drive to drive the gearing output shaft independently of the main drive device. A work machine device includes the drive device and a work machine which can be started accordingly in a low-wear manner and which enables longer-term operation in the reverse direction of rotation. Corresponding methods which are also provided in connection with the drive device and the work machine device, enable low-wear starting and the elimination of undesired operating states.

Abstract: A power transmission unit for a vehicle is provided. In the power transmission unit, a continuously variable transmission to alter a speed ratio continuously is disposed between an input shaft to which a torque of a prime mover is inputted and an output shaft rotated by the torque transmitted from the input shaft. A first gear train that transmits the torque to propel the vehicle in the forward direction is arranged parallel to a second gear train that transmits the torque to propelling the vehicle backwardly.

Abstract: A device for the propulsion and eccentric braking of a vehicle having a pedal drive, which includes a first shaft, a drive mechanism including one or a plurality of chain wheels, belt pulleys or elements of a Cardan drive, a second hollow shaft arranged concentrically about the first shaft mounted into a rear wheel, a freewheel clutch mounted between the first shaft and the drive mechanism, and an optionally engageable reverse gear mechanism mounted between the first and the second shaft. The first and the second shafts are connected to each other in a torsionally rigid manner when the reverse gear mechanism is in the engaged and disengaged state. The freewheel clutch prevents a rotation of the drive mechanism relative to the first shaft in a clockwise direction and is in a freewheeling state when the drive mechanism rotates in a counter-clockwise direction relative to the first shaft.

Abstract: A device is provided that attaches to a hub of a drive mechanism that utilizes a flat plate, shuttle enabled, engagement/disengagement mechanism to sequentially disengage a forward drive power and then engage a reverse drive power assembly which results in a reverse output of power to the drive mechanism. In a particular application, a device is provided that attaches to the hub of a motorcycle wheel that enables the normal forward drive mechanism to provide reverse power without changing the actual direction of the drive sprocket. An important aspect of the device of the present invention is that the reverse gear package when not in use is completely idle and has absolutely no effect on the forward drive components when not in use.

Abstract: A vehicle power transmission device mounted on a vehicle for transmitting power from a power generating source to an axle through a gear train accommodated in a case, including: a lubricating pump that is accommodated in the case and which is driven by the power generating source and is capable of supplying a lubricating medium to an element to be lubricated; a lubricating medium storage portion that stores the lubricating medium; a lowermost gear that is located at a lowest position in the case, and which scoops up the lubricating medium in an inner bottom of the case toward a center of the case during normal rotation of the axle without guiding the lubricating medium along an inner wall surface of the case; a partition wall; and a lubrication flow path that guides the lubricating medium scooped up by the lowermost gear to a predetermined element to be lubricated.

Abstract: A vehicle power transmission device mounted on a vehicle for transmitting power from a power generating source to an axle through a gear train accommodated in a case, including: a lubricating pump that is driven by the power generating source and is capable of supplying a lubricating medium to an element to be lubricated; a lubricating medium storage portion that stores the lubricating medium; a lowermost gear that is located at a lowest position in the case; a topmost gear that is located at a highest position in the case; a lubrication flow path that guides the lubricating medium scooped up by the lowermost gear and carried by the gear train to a predetermined element to be lubricated; and a guide portion that guides the lubricating medium scooped up by the lowermost gear and carried by the gear train to an inlet of the lubrication flow path.

Abstract: A system for a self-propelled vehicle with variable travel speed, such as a mowing tractor, includes, between the primary driving shaft of the vehicle and an output shaft, such as the wheel drive shaft of the vehicle, at least one controlled variable speed drive with a belt and controlled mechanism for reversing the direction of travel of the vehicle, the primary driving shaft transmitting, via the variable speed drive, its motion to the input shaft of the reversal mechanism, itself able to directly or indirectly engage the output shaft, such as the wheel drive shaft of the vehicle, in such a way as to allow the vehicle to travel forward or in reverse respectively, at a variable travel speed. This transmission system is characterized in that the variable speed drive and the mechanism for reversing the direction of travel of the vehicle are controlled selectively from the same control device.

Abstract: Reverse gear for a motor vehicle transmission is achieved through a chain assembly having two sprockets and a multi-link chain. One of the sprockets is coupled to a clutch which selectively connects it to an input or output shaft. The other sprocket is directly coupled to the other, i.e., output or input shaft. The multi-link chain carries drive torque from the input shaft to the output shaft when the clutch is engaged. Because the other driving connections between the input shaft and the output shaft associated with the forward gears or gear ratios are through gears which cause a reversal of rotational direction, the driving connection achieved by the chain assembly, without a directional reversal, is, in fact, opposite in direction to the rotational direction of the forward gears, thereby providing reverse.

Abstract: The invention relates to a transmission, in particular between a drive shaft and a wheel driving shaft of an engine, in particular of an automotive engine, such as a riding mower engine, whereby this transmission is of the belt-controlled variable-speed drive unit type (2) combined with a clutch device (7).

Abstract: An improved multifunctional pedaling motion bicycle, particularly to a transmission mechanism of bicycle includes a clutch member that is manually controlled to move between and selectively engage primary and secondary control blocks to perform different modes of operation of the bicycle, including regular pedaling, independent pedaling of cranks, same-direction upward/downward movements of the cranks. The transmission mechanism has a simple and light-weighted structure and thus low cost and low failure risk with extended service life. Further, a variety of different operation modes can be performed without dedicated rear hub.

Abstract: The invention relates to a device for controlling the contact pressure of a transmission element of a continuously variable transmission, especially the traction element of a flexible drive for motor vehicles. The inventive device is provided with at least two levers as the transmission elements that provide the contact pressure depending on torque and ratio. Said levers are pivoted to the driving transmission elements and to the driven transmission elements and act upon an axially displaceable transmission element that indirectly or directly exerts the contact pressure via at least one rolling element each. The lever length effective to exert the contact pressure can be varied in accordance with the selected transmission ratio.

Abstract: A flexible apparatus for metering agricultural chemicals in a wet blade chemical distribution system consists of a modular peristaltic pump delivery apparatus (24) having an impeller (38) and a mounting bore (30) in a computer-controlled servomechanism that meters the correct amount of a wide variety of agricultural chemical regardless of equipment speed. It is especially well suited for easy field chemical change over and maintenance.

Abstract: Provided is a belt-drive continuously variable transmission which comprises a pair of drive pulley and driven pulley, and a belt engaged with the pulleys. The belt includes an endless carrier and a plurality of transverse elements closely arranged on the carrier. Each transverse element has an edge and rotatable about the edge in the longitudinal direction of the belt and converging side faces for contact with contact surfaces of the pulleys. Each of the side faces is curved toward each of the contact surfaces in such a manner as to have, when each of the transverse elements is observed in a plan view, such a circular arc that is of a predetermined radius R and has a center located on a straight line perpendicular to each of the contact surfaces and extending through a point at which the edge and each of the contact surfaces meet.

Abstract: A method for regulating a belt variator type transmission unit for motor vehicles, and which includes a belt variator, a reversing unit and a hydraulically controlled engine drive coupling that controls the reversing unit to provide forward and reverse drive connection between the engine and variator. The drive coupling comprises a forward coupling and a reverse coupling including fluid driven clutches which may be operated via a pressure regulating unit that provides an adjustable clutch actuating pressure. The clutch actuating pressure is hydraulically regulated both as a function of engine Pitot pressure which is representative of the engine speed, and as a function of a regulated pressure which is set by an electronically controlled valve.

Abstract: A realistic motion ride simulator comprising three stacked tiers pivotally supported by three legs. Each tier can be activated independent of each other while the entire apparatus is moved up and down, tilted laterally, pitched upwardly and downwardly and combinations thereof to simulate the various dynamic forces experienced by riders of a moving vehicle.

Abstract: Transmission unit for motor vehicles of the type which is provided with a continuously variable transmission (3), a reversing unit (2) and a number of clutches (16-18) to engage the reversing unit (2) in one or the other sense of rotation. At least one of these clutches (16-18) is controlled by a hydraulic pressure unit (25), with a piston (27) which can be moved in a cylinder (28), whereby the seal between the piston (27) and the cylinder (28) is an elastic sealing ring (32), The piston (27) is provided with at least one passage to let hydraulic medium escape under the influence of the centrifugal force, whereby the at least one passage (43) is located in the above-mentioned sealing ring (32).

Abstract: A reversing drive or transmission is shown which is particularly useful for all-terrain vehicles. The drive includes a drive shaft and an intermediate axle spaced therefrom. The drive shaft and intermediate axle have respective pulley and drum assemblies mounted thereon in registration, with a V-belt coupling the drive and driven pulleys. A swing arm moves the intermediate axle toward and away from the drive shaft to tension the V-belt or alternatively engage the drive wheels for reverse rotation of the intermediate axle. An intermediate sprocket mounted on the intermediate axle drives a driven sprocket co-axially mounted on the pivot axis of the swing arm. The plane of rotation of the intermediate sprocket is transversely orientated with respect to the swing arm pivot axis, so that torsional forces on the intermediate sprocket tend to reinforce the engagement between the respective pulley and drum assemblies in the forward and reverse directions.

Abstract: In a continuous speed-shifting device in which a variable speed pulley mechanism and a planetary gear mechanism are combined with each other, respective cam mechanisms are provided on respective back sides of movable sheaves of variable speed pulleys of the variable speed pulley mechanism so as to move the sheaves toward and away from fixed sheaves of the variable speed pulleys, a linkage mechanism for linking both the cam mechanisms to each other is provided so that the diameters at which the belt is wound around both the pulleys are varied in a reverse direction to each other, the variable speed pulley mechanism is shifted in speed in such a manner that an output gear for supporting a pinion of the planetary gear mechanism is switched among a normal rotation state, a neutral state and a reverse rotation states with respect to a rotary shaft, the output gear is adjustable to the neutral state by a balance between the thrusts to the belt by both the pulleys, and the variable speed pulley mechanism serves as a

Abstract: A control system for an automatic transmission of an automotive vehicle is provided. This control system includes a forward speed holding valve which is arranged in a hydraulic line communicating between a manual selector valve and a reverse frictional element such as a low and reverse brake, and has a first valve position which establishes fluid communication between the manual selector valve and the reverse frictional element to supply the hydraulic pressure from the manual selector valve to the reverse frictional element and a second valve position which blocks the fluid communication therebetween. When a selector lever is shifted to a reverse position while a vehicle is parked, the forward speed holding valve is controlled to assume the first valve position to engage the reverse frictional element.

Abstract: A hydraulic control apparatus for controlling a continuously variable transmission of a motor vehicle, which transmission includes a first and a second shaft, a pair of variable-diameter pulleys provided on the first and second shafts, respectively, a transmission belt connecting the pulleys, and a pair of hydraulic actuators one of which receives a belt tensioning pressure for controlling a tension of the belt. The hydraulic control apparatus includes a reversal detecting device for determining whether a rotating direction of the pulleys has been reversed or not, and a pressure increasing device for temporarily increasing the belt tensioning pressure when the reversal detecting device detects reversal of the rotating direction of the pulleys.

Abstract: A belt-type continuously variable transmission in which a drive pulley mounted on an input shaft and a driven pulley mounted on an output shaft are connected by an endless belt, a forward- and backward-movement switchover mechanism for transmitting a driving force from an engine to the drive pulley is disposed adjacent the stationary pulley half of the drive pulley, and a starting clutch for transmitting the rotation of the output shaft to driving wheels is disposed adjacent stationary pulley half of the driven pulley. This ensures that dead spaces created in a section opposed to both the movable pulley halves which move axially can be utilized as spaces for disposition of the forward- and backward-movement switchover mechanism and the starting clutch, thereby enabling the forward- and backward-movement switchover mechanism and the starting clutch to be disposed in a compact layout.

Abstract: A rotational speed switcher which employs a synchronous motor which is low-cost, long-lasting and quiet, and when applied to a printer or document scanning apparatus or the like enables documents to be transported at either of two speeds selected by switching the motor between forward and reverse operating modes without changing the direction of rotation of the drive shafts.

Abstract: A switching and control device is provided for a drive assembly used for driving a motor vehicle. This drive assembly is provided with a driving motor having an adjustment element for the power control system and a continuously variable gear change, which is downstream in the power flow. The gear change contains a control device which operates into an adjustment element for the transmission ratio. The drive assembly also includes a reversing gear containing a switching device for switching over between a gear position for forward motion and another gear position for reverse motion. The switching and control device operates with a link between the adjustment element for the power control and the control device and a range selection member which can be switched by a manually operable selection adjustment element.

Abstract: A control system for a selector mechanism for a vehicle provided with a clutch and a continuously variable transmission having operational ranges such as driving range and a reverse range. A synchronizer is provided for selecting either of forward and reverse gears. A hydraulic actuator is provided to respond to the operation of a selector lever for operating the synchronizer for the selection of the ranges. A control unit is provided to respond to the selection of the range for engaging the clutch with a delay time after engagement of the synchronizer.

Abstract: An improved vehicle control system for a vehicle having an engine which produces output torque through an output sheave and a transaxle mounted to the vehicle's frame, the transaxle being selectively operational in forward, neutral and reverse modes in response to a mode selection link operatively connected to the transaxle. The transaxle functions as a gear box having a single gear ratio between the input sheave and the drive axles in both the forward and reverse operating modes, a transaxle and a brake. The output sheave of the engine is in communication with the input sheave through a first and second belt drivingly mounted to a plurality of sheaves and a variator such that an increase in tension on a first belt causes the variator to increase the rate of rotation of a second belt. A speed range sheave mounted to an arm is operatively connected to the first belt.

Abstract: Control device of a continuous transmission associated with a heat engine and with a reversing converter whose turbine shaft is either made solid with the shaft of the reactor to obtain forward, or made solid with the housing to obtain reverse, characterized in that said control device generates an input speed set point of the variable speed drive (12) for reverse, which is different from the input speed set point of the variable speed drive for forward; so as to obtain, during the sliding time of the converter in reverse, a transmission ratio of the variable speed drive (12) which is lengthened and becomes longer than the one of forward.

Abstract: A belt-pulley type steplessly variable vehicle transmission mechanism including a belt-pulley type transmission and a reverse gear mechanism both connected with an output differential gear device. A selecting mechanism is provided for connecting the input member alternately with the belt-pulley type transmission or the reverse gear mechanism so that the reverse drive can be made at a constant speed ratio.

Abstract: This is a belt drive arrangement in which two belts are used, the inside surface of one running in contact with the outside surface of the other for part of their lengths and both running within the width of one belt, with input and output shafts, and one or more idler pulleys providing forward or reverse rotation of the output shaft with the input shaft having a constant direction of rotation.

Abstract: A transmission rotatable coaxially about a crankshaft. The transmission is rotatable to three positions: forward, idle, and reverse. Four pulleys are rotatably affixed to the casing such that each pulley occupies the corner of an imaginary square, the diagonals of the square intersecting the longitudinal axis of the crankshaft. The planes of the pulleys all lie in a single plane generally perpendicular to the crankshaft. Thus as the casing is rotated the pulleys rotate coaxially about the crankshaft. Two of the pulleys occupying adjacent corners are driven in opposite directions by gear and/or chain and sprocket means disposed in the casing. The other two pulleys are free turning. The casing pulleys are belt coupled to a pulley on a drive shaft. When the casing is in the forward position, the belt is in contact with one of the driven pulleys and one of the free turning pulleys only. When the casing is in the idle position the belt is in contact only with the two free turning pulleys.

Abstract: A tine tiller has a frame mounted on traction wheels for movement in either direction. The frame has tines rotatably mounted on each side thereof and driven in either direction irrespective of the direction of movement of the frame by rotation of the traction wheels. The speed of rotation of the traction wheels can be changed without stopping movement of the frame.

Abstract: A combine (11) is provided with a feed reverser mechanism (81) to drive a pair of feeder conveyors (23, 24) and a header conveyor auger (46) in reverse when the operator detects a jammed condition in the feeder conveyors or auger. The reversing mechanism (81) includes a hydraulic drive motor (92), a wrap spring clutch (93) and a hydraulic actuator (142), which automatically increases the tension on a drive belt (68) when the conveyors (23, 24) and auger (46) are driven in a reverse direction by the hydraulic motor (92). A pump relief valve (191) prevents delivery of excessive torque to the conveyors (23, 24) and auger (46) during a feed reversing operation.

Abstract: Bidirectional tape drive systems have first and second tape drive capstans and first and second tape drives for rotating, respectively, the first and second tape drive capstans. The first capstan is angularly movable relative to the first capstan drive and a first elastic coupling restrains relative angular movement between the first capstan and the first capstan drive. Similarly, the second capstan is angularly movable relative to the second capstan drive and a second elastic coupling restrains relative angular movement between the second capstan and the second capstan drive. In this manner, tape tension is maintained above zero when the bidirectional tape drive changes directions, and excessive tension upon application of the tape assembly to the tape drive is avoided, while tape slack upon removal of the tape assembly from the tape drive is automatically taken up.

Abstract: Station-individual control sets of dispatching and receiver stations are connected to a multiconductor address line which is connected to a central program control device. All control sets are connected via an operation decoder to a multiconductor control line connecting to the program control device. After the output to the control line of operation information from the program control device which introduces a destination information transfer, the operation decoder of the marked dispatching station responds and applies signal voltage to a destination selection device connected to the address line in parallel with an address decoder.

Abstract: A combination speed control and transmission forward-reverse control for a lawn tractor, or the like, having an engine including a drive shaft and output pulley, a transmission including a driven input shaft and pulley, and a belt-tensioning, or other similar type clutch. The control includes an actuating lever mounted on the tractor chassis, and control cables extending between the actuating lever and the clutch, and between the actuating lever and the transmission forward-reverse shift linkage. Movement of the actuating lever in the forward direction shifts the transmission linkage to the forward position and releases the clutch to engage the driving and driven pulleys with one another. Further forward motion of the actuating lever causes a greater coupling of the driving and driven pulleys to cause the lawn tractor to move forward faster. Returning of the actuating lever to a neutral position disengages the clutch and moves the transmission shift linkage to neutral.

Abstract: A drive assembly is disclosed which incorporates two power take-off assemblies between an input and output drive for an earthworking machine. The power take-off assemblies each have a clutch operable independently of the other clutch for drivingly connecting the input and output drives for rotating tines of the machine in opposite directions. A drive select mechanism is selectively movable between two different operating positions wherein the clutches of the power assemblies are respectively and alternatively actuated to establish the desired drive connection between the input and output drives.