Abstract: A saddle-positioning apparatus includes a first positioning unit for positioning a saddle in a first dimension, a second positioning unit for positioning the saddle in a second dimension, and a lever connected to both of the first and second positioning units. The lever is movable from a neutral position in a direction to move the first positioning unit from a locking position to a releasing position to allow movement of the saddle in the first dimension. The lever is movable from the neutral position in an opposite direction to move the second positioning unit from a locking position to a releasing position to allow movement of the saddle in the second dimension.

Abstract: A treadmill includes a base, a lever, an elevator, a cushion, a scale and an adjustor. The lever is connected to the base. The elevator is connected to the lever at an end and supported on the ground at another end. The cushion is connected to the base at an end and connected to the lever at another end. The scale is supported on the base. The adjustor is electrically connected to the scale so that the adjustor adjusts the cushion based on the weight of a user measured by the scale.

Abstract: A saddle-positioning apparatus includes a first positioning unit for positioning a saddle in a first dimension, a second positioning unit for positioning the saddle in a second dimension, and a lever connected to both of the first and second positioning units. The lever is movable from a neutral position in a direction to move the first positioning unit from a locking position to a releasing position to allow movement of the saddle in the first dimension. The lever is movable from the neutral position in an opposite direction to move the second positioning unit from a locking position to a releasing position to allow movement of the saddle in the second dimension.

Abstract: Disclosed is an apparatus for pivoting a platform on a base of a treadmill. The apparatus includes two front tracks secured to the base, two front casters movable in the front tracks, an axle connected to the front casters, a sleeve for receiving the axle, two front rockers each including an end pivotally connected to the platform and another end connected to an end of the sleeve, a motor supported on the platform, an extensible element including an end operatively connected to the motor and another end connected to sleeve, two rear tracks secured to the base, two rear casters movable in the rear tracks, two rear rockers each including an end pivotally connected to the platform and another end connected to a related one of the rear casters, and two connectors each for connecting a related one of the front rockers to a related one of the rear rockers.

Abstract: A wrench of the present invention includes a main body having a handle and a driving portion. The main body is made from aluminum alloy, which consists of Si, Fe, Cu, Mn, Mg, Cr, Zn, Ti and Al. Specifically, the aluminum alloy has less than 1% by weight of Si, less than 1% by weight of Fe, 1-5% by weight of Cu, less than 1% by weight of Mn, 2-5% by weight of Mg, less than 1% by weight of Cr, 5-9% by weight of Zn and less than 1% by weight of and the rest part thereof is Al.

Abstract: A locking gear is a differential device configured between the main flywheel that is attached with a differential and one end of a spindle. The locking gear includes a protruded annulet that is configured at the outside of the main flywheel, and several radial through holes on the protruded annulet, and several grooves configured at one end of the spindle that will aim at each radial through hole on the protruded annulet respectively when the spindle rotates to a predetermined angle, and beads that are placed in each radial through hole. Also, there is a clutch body that sleeves one end of the spindle, and the end of its central through hole forms a small expansion section and a large expansion section, and the aperture of the small expansion section right gears the outside diameter of the protruded annulet, therefore the beads can be fixed internally.

Abstract: A differential device includes a main flywheel, a main shaft integrated with the main central gear, prime train of planet gears, secondary train of planet gears, secondary shaft integrated with the secondary central gear, and a fixing plate. This improved device can resolve problems of current bevel gear-driven differential devices and improve dramatically the drive force and stability of the differential device.