Abstract: A continuous rolling method includes the steps of: flash-butt welding a rear end of a preceding billet with a front end of a succeeding billet; grinding the welded portion to remove a burr on the welded portion; heating the continuous billet; and rolling the continuous billet through a series of rolling mills. The flash-butt welding step includes joining the rear end of the preceding billet with the front end of the succeeding billet by using the stationary welder and joining the billets having at least double the length of the preceding billet by using the travelling welder. A continuous rolling apparatus includes a stationary flash-butt welder, a travelling flash-butt welder, a travelling grinding machine, an induction heater and a series of continuous rolling mills.

Abstract: A hot saw cutting type continuous rolling method comprises casting two strand billets continuously; cutting the billets to predetermined length by hot saws; directly feeding billet portions obtained by cutting onto a rolling line via a line connecting device; continuously welding and joining the billets portions by a flash butt welder to form a continuous billet; grinding and removing burrs at the welded portion of the continuous billet by a grinding machine; and continuously rolling the billet by a rolling mill group, after heating the continuous billet to a higher temperature by an induction heater. A hot saw cutting type continuous rolling apparatus is provided for performing the above-described method.

Abstract: An apparatus for joining billets in continuous rolling mill comprises a pair of parallel rails 14, a travelling welding machine 4 having first support rolls 54,55, a travelling grinding machine 5 having second support rolls 56a, 56b,57, a first group of carriages 41,42,43 each of which has a third support roll 51,52,53 for supporting billets, and a second group of carriages 44,45,46 each of which has a fourth support roll 58,59,60 for supporting billets. The travelling welding machine welds a rear end of a preceding billet with a front end of a succeeding billet while moving on the pair of rails. The travelling grinding machine removes burrs on a weld zone of the billets while moving on the pair of rails. The first group of carriages is arranged upstream of the travelling welding machine and is connected with the travelling welding machine by a flexible joint member.

Abstract: A method for removing burrs in a continuous rolling process including the steps of joining the rear end of a preceding billet with the front end of a succeeding billet using a flash butt welding method while both billets are moving, and grinding a burr on the welded part of the joined portion using a plurality of grinders while the billets are moving and while rotating the grinders and moving the grinders synchronously with the travelling speed of the billets. A grinding machine for continuously rolling a round billet includes a travelling body shuttling along the direction of movement of the round billet, a turret ring rotatably supported by the travelling body, and a plurality of grinding devices arranged in a movable manner within a radius of the turret ring, wherein the grinding devices include grinders which are set at a tilted angle relative to the center axis of the rotatable turret ring.

Abstract: A hydraulic control device for controlling a belt-and-pulley type continuously variable transmission for a motor vehicle which has two variable-diameter pulleys connected by a belt, and two hydraulic actuators for changing effective diameters of the pulleys. The hydraulic control device includes a first and a second pressure regulating valve for adjusting a pressure of a fluid supplied from a hydraulic power source, respectively to a first line pressure and a second line pressure lower than the first line pressure, and a CVT shift control valve device for controlling a speed ratio of the transmission. The valve device includes a shift-direction switching directional control valve and a shift-speed control flow control valve.

Abstract: A pair of pulleys for a belt-and-pulley type continuously variable transmission wherein the pulleys are connected by a transmission belt such that the belt is partially in contact with contact surfaces of the pulleys. At least one of the pair of pulleys has a contact surface which has a plurality of raised and recessed portions that are spaced apart from each other at irregular angular intervals in a circumferential direction of the pulley.

Abstract: A hydraulic control device for controlling a belt-and-pulley type continuously variable transmission for an automotive vehicle which includes an input and an output shaft, a pair of variable-diameter pulleys provided on the input and output shafts, respectively, a transmission belt connecting the pair of pulleys, and a pair of hydraulic actuators for changing effective diameters of the variable-diameter pulleys. The hydraulic control device further includes a shift control valve device for controlling pressures applied to the hydraulic actuators, to change the speed ratio of the continuously variable transmission over a mechanically defined range, and a controller for applying a drive signal to the shift control valve device. The controller includes a device for limiting a value of the drive signal, so as to prevent the actual speed ratio of the transmission from reaching upper and lower limits of the mechanically defined range.

Abstract: A hydraulic control system for a continuously variable transmission for an automotive vehicle, the transmission having a first and a second variable-diameter pulley provided on respective first and second shafts, a belt connecting the first and second pulleys, and a first and a second hydraulic cylinder for changing effective diameters of the first and second pulleys.

Abstract: A hydraulic control system for a continuously variable transmission for an automotive vehicle, the transmission having a first and a second variable-diameter pulley provided on respective first and second shafts, a belt connecting the first and second pulleys, and a first and a second hydraulic cylinder for changing effective diameters of the first and second pulleys.

Abstract: A hydraulic control system for a continuously variable transmission for an automotive vehicle, the transmission having a first and a second variable-diameter pulley provided on respective first and second shafts, a belt connecting the first and second pulleys, and a first and a second hydraulic cylinder for changing effective diameters of the first and second pulleys. The control system includes a shift-control valve receiving a first line pressure from said pressure source to one of the cylinders, while simultaneously permitting a flow of the fluid from the other cylinder. A second pressure line is connected to the shift-control valve to receive therefrom a pressure of the fluid flowing from above-indicated other cylinder. A pressure regulating valve regulates the pressure in the second pressure line, as a second line pressure lower than said first line pressure.

Abstract: A chain belt comprises a plurality of V-shape blocks and connecting means. The V-shape block includes a pair of lateral side surfaces, a first contacting surface and a second contacting surface. An opening is defined within the first and second contacting surfaces of the V-shape block. The connecting means connects the plurality of V-shape blocks to each other, and forms a continuous loop. The connecting means includes a plurality of links and a plurality of pins. The link is inserted in the opening of the V-shape block. The link includes a pair of ends and an intermediate portion. The intermediate portion of the link is positioned in the opening of the V-shape block. The ends of the link are located on opposite sides of the V-shape block. An aperture is defined within each of the ends of the link. An outer projection extends outwardly from at least one of the ends of the link toward the outside of the continuous loop.

Abstract: This invention relates to a continuously variable transmission which increases the range of potential transmission ratios and thereby decreases the fuel consumption rate, and which is compact in size and thereby increases space in a passenger compartment. The continuously variable transmission has low and high gear trains and a reverse gear train. Each of the low and high gear trains has a pair of meshed gears and a one-way clutch which controls the direction of transmitting the generated torque. The high gear train further has a clutch which engages at a medium or high vehicle speed and disengages at a low vehicle speed. A jaw clutch is slidably mounted on an output shaft and is located in either a first position or a second position. The jaw clutch forms the low gear train when the jaw clutch is in the first position, and the reverse gear train when the jaw clutch is located on the second position.

Abstract: An endless belt for the power transmission, wherein a plurality of block bodies each comprising a body member formed of a highly rigid material and provided at opposite side portions thereof with inclined surfaces being in frictional engagement with pulleys and a clamp member formed separately of said body member are arranged in a row and adjacent to one another on a belt-shaped endless carrier formed of fabric in such a manner that the endless carrier is clamped between the body members and the clamp members, the endless belt being of such an arrangement that the belt-shaped endless carrier formed of fabric is woven by warps disposed in the longitudinal direction and wefts disposed in the widthwise direction, with the wefts restraining the warps.

Abstract: A V-belt assembly trained over V-belt wheels which includes a flexible endless belt, a plurality of rigid suspension members secured fixedly to the endless belt perpendicularly to the longitudinal direction of the endless belt and approximately U-shaped rigid transmission pieces pivotably supported by pivotal projections projecting sidewise from both sides of the respective suspension members and capable of engaging V-shaped grooves in the V-belt wheels. The central axis of the pivotal projections passes through the approximately central portion of the thickness of the endless belt. In the ends of both legs of the U-shaped transmission piece are formed grooves for receiving the pivotal projection of the suspension member, and lids for covering respectively these grooves are secured fixedly to the ends of the legs.

Abstract: A V-belt assembly for transmitting power, which includes a V-belt assembly trained over a V-belt wheel; a flexible endless belt; a plurality of suspension members slidably mounted on the endless belt in a longitudinal direction thereof and which includes a pin member and a U-shaped member connected to said pin, and a plurality of U-shaped transmission pieces separated from the U-shaped member, having side surfaces corresponding to side walls of a V-shaped groove of the V-belt wheel and supported swingably by the suspension members, respectively.

Abstract: A continuously variable belt transmission device, including driving and driven pulley assemblies on parallel axes. Each pulley assembly includes an axially fixed and an axially movable pulley member with confronting conical face which define a V-shaped groove between them whose width is variable according to axial movement of the movable pulley member wherein the axial orders of the fixed and movable pulley members are opposite in the two pulley assemblies. An endless belt assembly is fitted in a power transmitting manner in the V-shaped grooves of the driving and driven pulley assemblies, and thus by alteration of the widths of the grooves the power transmission ratio can be varied.

Abstract: A V-belt assembly trained over U-belt wheels for transmitting power and which includes a flexible endless belt, a plurality of rigid suspension members secured fixedly to the endless belt perpendicularly to the longitudinal direction of the endless belt and rigid transmission pieces surrounding the respective suspension members in the section perpendicular to the longitudinal direction of the endless belt, supported pivotal projections projecting sideways from both sides of the suspension members and capable of engaging V-shaped grooves in the V-belt wheels. This rigid transmission piece is shaped in the generally rectangular form constituted from two generally U-shaped pieces. At least one of the pivotal projections of the suspension member and holes in the transmission piece located approximately in the center of a space between the top surface and the bottom surface of the transmission piece fitted on the pivotal projections of the suspension member is coated with an antifriction material layer.

Abstract: A belt means for transmitting torque between pulleys in a continuously variable transmission. The belt means comprises a plurality of abutting hoops superimposed inside of each other, with no clearance being provided between abutting hoops because the outer circumferential diameter of an inner hoop is greater than or equal to an inner diameter of an outwardly located hoop, whereby, the tensile stresses on the innermost hoop are decreased to enhance the durability and increase the service-life of the inner hoop.

Abstract: A hydraulic apparatus for a continuously variable transmission, through which the RPM ratios of a driving pulley to a driven pulley is consecutively varied. Such RPM ratios are varied by electrically controlling the volume of hydraulic fluid supplied to or drained from a cylinder of a driving pulley.

Abstract: A continuously variable transmission means having block members, each block member having longitudinal projections causing the rotating radius of the block members to be the same as the rotating radius of an endless carrier, the block members and endless carrier forming a belt which extends between a driving pulley and a driven pulley. When a portion of the belt is in a transition area between a straight extension between the pulleys and moving toward contacting a peripheral portion on one of the pulley, the sliding movement between adjacent block members and the carrier is obviated due to the rotating radius of the block members being equivalent to the radius of the carrier.