Abstract: A collapsible treadmill includes a base, a pivot seat at a front portion of the base, an upright bar mounted in the pivot seat, a securing bar fixedly disposed on the upright bar, and two grip bars. The grip bars are locked to the securing bar at their top ends and to the base at their bottom ends. When the treadmill is not in use, the grip bars and the upright bar may be lowered in the direction of the base so as to reduce the size of the treadmill as a whole for easy storage.

Abstract: A resistance mechanism for an exercising device includes a frame, a bi-directional electric motor installed on the frame and provided with an output axle, a pulley fixedly mounted on the output axle and formed with two parallel circular grooves, an idle wheel rotatably arranged on the frame, a first belt having one end connected with one of the grooves of the pulley and wound thereon in a direction, a second belt having one end connected with another one of the grooves of the pulley and wound thereon in an opposite direction and engaged with the idle wheel, and an oscillating arm having one end pivotally connected with the axle of the exericsing device and another end fixedly connected with another end of the first belt and another end of the second belt, whereby a resistance force will be applied to the axle when the electric bi-directional motor is turned on.

Abstract: A collapsible treadmill includes a base body and handle bars. The base body supports such basic components as an electric motor, front and rear shafts, a tread belt, a tread board. The base body includes a U-shaped frame and a rectangular main frame. The U-shaped frame is provided with pivot seats at their ends, while the main frame is provided with corresponding pivot plates at both sides of its front end. The U-shaped frame and the main frame are pivotally joined by screw bolts connecting the pivot seats and the pivot plates such that the main frame may be folded upwardly to rest between the handle bars when the treadmill is not in use so as to reduce floor-occupying space.

Abstract: This invention relates to an elevating structure for a motor driven treadmill and in particular to one including a base provided with a front wheel support and a rear wheel support, a frame mounted on the box channel of the front wheel support and provided with an upper plate and a lower plate, a motor installed between the upper plate and the lower plate of the frame and having a splined axle, a driving gear mounted on the upper plate of the frame and engaged with a medium gear which is in turn engaged with the splined axle of the motor, a gear train engaged with the splined axle of the motor and with a variable resistor, and a cover adapted to enclose the upper plate of the frame, whereby the amount of exertion required to maintain pace of an user with the treadmill may be adjusted by inclining the running surface.

Abstract: This invention relates to an adjustable roller structure for an exercising stationary bicycle and in particular to one which includes a driving wheel connected with two pedals, a driven wheel connected with the driving wheel by a belt, a roller mounted on each end of the driven wheel, and an adjusting means having an adjusting screw engaged with a block connected with an arm, whereby the inner disc may be controlled to move towards or away from the outer disc simply by regulating the adjusting screw.

Abstract: This invention relates to a power stairclimber and in particular to one including a base on which there are mounted a pair of pedals and a handlebar, a gear pivoted on the base, two driving rods respectively mounted on two sides of the gear and arranged at opposite directions, two cranks rotatably connected at one end with the lugs of the base and at the other end with the driving rods and a worm gear meshed with the gear and having on the top a pulley which is in turn connected with a motor via a belt.

Abstract: This invention relates to a stairclimber with a safety speed changing device and in particular to one including a base, a handle frame vertically mounted on the base, a support vertically mounted between a gauge board and the base, a front bracket fixed on the base and spaced apart from the support, a rear bracket mounted on the base and disposed rearwardly of the front bracket, a transmission mechanism fixedly mounted on upper side of the front bracket and provided with a pulley connected to a rotating disc of a motor via a belt and a link pivotally connected with an oscillating rod having a pair of pedals, and a speed changing mechanism having a rotating handle disposed on upper half of the support to control an upper gear which in turn drives a lower gear via a chain.

Abstract: This invention relates to a running exerciser and in particular to one including a base frame on which there is fixedly mounted a motor. An endless belt is carried on a front rod and a rear rod in the base frame. A driving wheel with a conical surface is mounted on an axle of the motor. A driven wheel is installed at one end of the front rod and has a conical surface. Between the driving wheel and the driven wheel is a controlling conical disc provided with a frictional ring on the circumference thereof which partially contacts the conical surfaces of the driving wheel and the driven wheel. When the controlling disc is slightly moved towards or away from the driven wheel, the interconnection among the controlling conical disc and the driving and driven wheels will be changed thereby effectively increasing or decreasing the speed of the running exerciser.