PURPOSE:To achieve a good speed change feeling at all times, in a speed change controller associated with two transmission sections enable of independent changing, by correcting the speed change timing of at least one automatic transmission section on the basis of the control oil pressure of the transmission. CONSTITUTION:An automatic transmission comprises a torque converter 20, second transmissi...

PURPOSE:To enable highly accurate control by measuring the periods of pulse signals proportional to the rotation of the output shaft of transmission, then smoothing the periods while furthermore smoothing the reciprocal of said smoothed data or the rotation data and employing as a car speed data. CONSTITUTION:The ratio of the rotation between the input and output shafts of a transmission 2 is dete...

PURPOSE:To improve the reliability of speed change operation, in a transmission including a stepped transmission associated with a synchronous gearing device, by eliminating the unsatisfactory relative rotation between a synchronous ring in the synchronous gearing device and the output gear in a gear stage of the stepped transmission by means of the transmission of a torque through an automatic cl...

PURPOSE:To improve the transient responsiveness of the speed change ratio control by providing two pressure regulation valves for producing two types of line oil pressures having different levels, then controlling each hydraulic cylinder for modifying the effective diameter of a pair of variable pulleys by the differential pressure between both line oil pressures. CONSTITUTION:In a hydraulic contr...

PURPOSE:To improve the speed change response when decreasing the speed ratio by opening the working oil to be flowed out from one of respective cylinders for modifying the effective diameter of a pair of variable pulleys in accordance with the difference between two types of line oil pressures having different pressure levels. CONSTITUTION:In a hydraulic control circuit for a continuously variable...

PURPOSE:To improve the control response by controlling a spool valve chip in a speed change control valve which controls respective hydraulic cylinders for modifying the effective diameters of a pair of variable pulleys by means of the control hydraulic pressure being fed from a control oil pressure source and controlled through a solenoid control valve. CONSTITUTION:In a hydraulic control circuit...

PURPOSE:To prevent the slippage of a transmission belt caused on the leakage of the working oil by providing an unilateral bypath between an oil path of the working oil flowing out from a speed change control valve for controlling respective hydraulic cylinders which modifies the effective diameters of a pair of variable pulleys and the hydraulic cylinder. CONSTITUTION:In a hydraulic control circu...

PURPOSE:To eliminate the problem of the differential working oil pressure by bringing the output oil pressure close to a working oil pressure level regulated by means of a pressure regulation valve through the function of a throttle oil path under the condition where a speed change control valve for controlling respective hydraulic cylinders which modifies the effective diameters of a pair of vari...

PURPOSE:To regulate the line oil pressure into a level having an allowance by providing two pressure regulation valves for producing two types of line oil pressures having different pressure levels while forming the spool valve chip of one pressure regulation valve such that two pressure receiving faces of different area are provided. CONSTITUTION:In a hydraulic control circuit for a continuously ...

PURPOSE:To facilitate the control of oil pressure in a hydraulic cylinder at low pressure side by constructing a speed change control valve for controlling a pair of hydraulic cylinders which modifies the effective diameters of a pair of variable pulleys such that the cross-section of flow at the flow-out side is larger than that at the flow-in side. CONSTITUTION:A hydraulic control circuit for a ...

PURPOSE:To enable the abrupt change of the output oil pressure by constructing a speed change control valve for controlling a pair of hydraulic cylinders which modifies the effective diameters of a pair of variable pulleys such that the variation rate of the cross-section of flow at the flow-in side is higher than that at the flow-out side. CONSTITUTION:A hydraulic control circuit for a continuous...

Light-curable dental adhesive compositions containing a phosphorus-containing free radically polymerizable compound, chromophore-substituted halomethyl-s-triazine or oxadiazole, and an optional ketone. The compositions adhere well to dental substrates (e.g., dentin) and have excellent shelf life when formulated as a one-part composition.

PURPOSE:To obtain a compact and light-weight gear noise preventing device having a small number of components by providing a member of check means in form of a recess formed in an intermediate shaft between input and output gears and providing the other member of the check means in form of a pin or projection. CONSTITUTION:When an intermediate gear 17 is shifted to the right, the intermediate gear...

Catheter apparatus provides for high resolution intravascular imaging to assist indovascular lesions and to monitor the results of interventional therapy. An ultrasonic transducer (52) is carried by the distal end of a catheter adapted for insertion into a vessel, and either the transducer or another element is rotated and/or moved longitudinally relative to the catheter to image different portion...

PURPOSE:To increase energy quantity stored in a driving unit and enhance mechanical output and improve load resistance and driving efficiency, by using the disc-formed driving unit in a higher bending oscillation mode. CONSTITUTION:By putting a piezo-electric unit 7 having a hole on the central section, together with an elastic unit 8, a driving unit 9 is composed. On the surface of the driving un...

PURPOSE:To increase energy stored in a driving unit and enhance mechanical output and improve efficiency, by using the disc of a large mass in the same occupied space, in a diameter-directional secondary higher bending oscillation mode. CONSTITUTION:By putting a disc-formed piezo-electric unit 7 with a hole bored through the central section, together with a disc-formed elastic unit 8 with a bored ...

PURPOSE:To enable a stable high speed to be obtained and increase mechanical output, by a method wherein the disc of a large mass in the same occupied space is used, and wherein a higher bending oscillation mode is adopted, and wherein a projection unit is set at the specified position of a driving unit. CONSTITUTION:The disc-formed driving unit 9 of a large mass is composed in the same space by p...

PURPOSE:To transmit the mechanical energy of a driving unit efficiently to a mover, by a method wherein the disc-formed driving unit is adopted, and wherein the progressive wave of a tertiary or more bending oscillation mode in the peripheral direction and a secondary or more bending oscillation mode in the diameter direction is excited, and wherein a projection is set at the nodal position of osc...

PURPOSE:To increase mechanical output, by forming a driving unit in the shape of a disc, and by exciting the progressive wave of a bending oscillation mode tertiary or more in the peripheral direction and secondary in the diameter direction, on the driving unit. CONSTITUTION:The piezo-electric unit 7 of piezo-electric ceramics or the like for exciting the progressive wave of a bending oscillation ...