A drive wheel for off-center drive of an annular saw blade in a cutting machine, consists of at least two components, which are separable but held together during operation, namely a holding disc and a drive ring, the latter having an encircling drive groove for the inner edge of the saw blade, the drive ring being arranged radially outside a central portion of the holder disc.

A drive screw comprises: a head portion; a shank; and a helical thread portion extending along almost all the length of the shank, wherein an outside diameter of the drive screw including the thread portion being formed so as to be reduced from a portion close to the head portion in at least three stages.

A driving device includes a driving member which is frictionally engaged with a driven member or a member coupled to the driven member and which is movably supported on a fixed member, a piezoelectric element disposed in contact with the driving member, and a driving circuit for applying a voltage to the piezoelectric element so as to make the speed of expansion of the piezoelectric element different from the speed of contraction thereof.

A driving device in particular for sawing machines comprises two hydraulically rotatable members (23, 24), which are rotationally connected to each other and one of which is adapted to transmit driving power to a shaft (4). The second rotatable member (24) is connected to a first gear (25) so as to be secured against relative rotation thereto, said first gear being in driving force transmitting relation to a second gear (26), which likewise is arranged to transmit driving power to the shaft. Mea...

A driving device comprises at least one chain (16) in the form of a closed loop. The chain is connected to at least one driving member arranged to cause the chain to orbit. Furthermore, the chain is laid over diverting members which in combination with the driving member determine the form of the loop. A rubber element (17) is arranged on the face of the chain located outermost in the loop and forms a configuration generally enclosing the chain loop. The rubber element (17) is in a driving force...

A geared motor 101 comprising a reduction gear unit 102 of oscillating internal meshing planetary gear structure type and a motor unit 103 coupled to each other, the reduction gear unit 102 having a first shaft 111 and a second shaft 112 located on its center axis L, external gears 115a and 115b being fitted on the outer periphery of the first shaft so as to be capable of oscillating rotations, an internal gear 120 with which the external gears mesh internally being provided concentrically with ...

The driving device comprises a hydraulically shiftable friction coupling and a friction brake by means of which an input can be connected to a gear and which perform the function of a parking brake wherein an auxiliary release device comprising an adjustable accumulator piston and gear shift pistons interacting therewith separate friction coupling and friction brake thus interrupting the drive train; the accumulator cylinder of the auxiliary release device is connected to a supply tank via a con...

A driving assembly includes a viscous shear coupling (15), a clutch (17) and a hysteresis or eddy current brake (19). The clutch comprises inner and outer parts (20 and 21) between which are received torque-transmitting balls (18) received in a cage (16) to which is connected a disc (30) forming part of the brake. The outer part (21) can overrun the inner part whether or not the brake is actuated. The inner part (20) can overrun the outer part (21) if the brake (19) is not actuated but drives th...

A driving system and driving unit for driving luminous elements has a fast build-up speed from the application of voltage to the point of light emission, thereby allowing fast scanning, as well as the capacity for miniaturization of driving sources. The driving system for driving luminous elements includes a plurality of intersecting anode and cathode lines arranged in a matrix, the anode lines being one of scan lines and drive lines, and the cathode lines being the other of scan lines and drive...

A plurality of movable lenses included in a zoom lens system are driven individually by piezoelectric actuators provided one for each lens. Two driving rods are arranged at different positions along the same line in such a way that neither of the driving rods reaches into the driving stroke of the lens driven by the other. Each driving rod has a piezoelectric actuator provided at its end farther from the other. Alternatively, a plurality of piezoelectric actuators are fixed to a single base bloc...