Abstract: A caterpillar treadmill includes a non-rotational axle, a roller, a driver wheel, a follower wheel, two caterpillars, and tread slats. The roller is rotationally supported on the non-rotational axle. The driver wheel includes teeth on an external face, and is connected to the roller so that the driver wheel is rotatable together with the roller. The follower wheel includes teeth on an external face, and is connected to the roller so that the follower wheel is rotatable together with the roller. The first caterpillar is wound on the driver wheel and includes, on an internal face, racks engaged with the teeth of the driver wheel. The second caterpillar is wound on the follower wheel and includes, on an internal face, racks engaged with the teeth of the follower wheel. The tread slats are attached to an external face of the caterpillars.

Abstract: A treadmill includes a frame, a tread assembly and two cushion assemblies. Each of the cushion assemblies includes a supporting element and at least one buffering element. An upper portion of the tread assembly is supported on the supporting element. The buffering element is provided between the supporting element and the frame.

Abstract: An exercise machine includes a training unit, a transmission unit and an impedance system. The training unit includes a roller. The transmission unit is connected to the roller. The impedance system includes several impedance units adapted for selective connection to the transmission unit so that the selected impedance unit exerts impedance on the training unit. The impedance units exert different values of impedance on the training unit via the transmission unit.

Abstract: An adjustable bed includes a plank assembly, a support assembly, a frame and a power unit. The plank assembly includes a first waist plank and a second waist plank. The power unit is pivotally connected to the frame. The support assembly includes a waist-lifting unit that includes a first lifting element pivotally connected to a portion of the frame, a second lifting element pivotally connected to another portion of the frame, and a transmission unit operatively connected to the first and second lifting elements.

Abstract: An electric bed includes a basic unit and a lift unit. The basic unit includes a base, a sliding frame supported on the base, a backrest frame pivotally connected to the sliding frame, a headrest frame pivotally connected to the backrest frame, and a restraint including an end pivotally connected to the base and another end pivotally connected to the backrest frame. The backrest frame includes a lug that includes a slot. The lift unit includes a power element pivotally connected to the sliding frame, a rod operatively connected to the power element, a backrest driver pivotally connected to the rod, a headrest driver pivotally connected to the backrest driver, a backrest lever for pivotally connecting the backrest driver to the backrest frame, a roller supported on the backrest lever, and a threaded bolt inserted in the backrest driver and the slot of the lug of the backrest frame.

Abstract: An electric bed includes a basic unit and a lift unit. The basic unit includes a base, a sliding frame, an upper leg-rest frame, a lower leg-rest frame and a crankshaft. The sliding frame is supported on the base. The upper leg-rest frame is pivotally connected to the sliding frame. The lower leg-rest frame is pivotally connected to the upper leg-rest frame, and formed with at least one lug that includes a slot. The crankshaft includes a first crank formed thereon, a second crank formed thereon, an axle inserted in the first crank and the slot, and a caster supported on the axle. The lift unit includes a power element and a rod. The power element is pivotally connected to the sliding frame. The rod includes an end operatively connected to the power element and another end pivotally connected to the second crank.

Abstract: A bed includes a base, a mattress-supporting device, two driving units and a limiting unit. The base includes two tracks. The mattress-supporting device includes a frame, a body-supporting element and a leg-supporting element. The frame includes rollers supported on the tracks. The body-supporting element is pivotally connected to an end of the frame. The leg-supporting element is pivotally connected to another end of the frame. The first driving unit is operable for pivoting the body-supporting element. The second driving unit is operable for pivoting the leg-supporting element. The limiting unit is movable between a first position to allow horizontal movement of the mattress-supporting device on the base as the body-supporting element is pivoted and a second position to avoid horizontal movement of the mattress-supporting device on the base as the body-supporting element is pivoted.

Abstract: A portable escalator includes a frame, a stair caterpillar, a driving device and a braking device. The driving device includes a motor, a chain-sprocket unit and a belt-pulley unit. The motor includes a mandrel and is connected to the frame. The chain-sprocket unit is connected to the stair caterpillar. The belt-pulley unit includes two pulleys and a belt. The first pulley is connected to the mandrel. The second pulley is connected to the chain-sprocket unit. The belt is provided on the first and second pulleys so that the motor is operable to drive the stair caterpillar through the belt-pulley unit and the chain-sprocket unit. The braking device is connected to the mandrel so that the braking device is operable to stop the mandrel.

Abstract: A hospital bed includes a frame, a backrest unit, a driving unit, a leg support unit and a linkage unit. The frame includes posts supported on a floor. The backrest unit is pivotally connected to the frame. The leg support unit includes a portion pivotally connected to the frame and another portion pivotally connected to the backrest unit. The leg support unit is located opposite to the backrest unit on the frame. The driving unit includes a portion connected to the frame and another portion pivotally connected to the backrest unit. The linkage unit connects the leg support unit to the backrest unit.

Abstract: A treadmill includes a base, a platform, a universal joint, two elevators and two telescopic elements. The universal joint is used to connect a rear portion of the base to a rear portion of the platform. Each of the elevators includes a post supported on a front portion of the base and a carriage movably supported on the post. Each of the telescopic elements includes an end connected to a front portion of the platform and another end connected to the carriage of a corresponding one of the elevators.

Abstract: An elliptical exercise machine includes a frame, an impedance unit, two linkage units and a stride-adjusting unit. The impedance unit includes a flywheel supported on the frame and two cranks connected to the flywheel. Each linkage unit includes a rocking element and a moving element. The rocking element includes an upper end and a lower end. The moving element includes a rear end and a front end connected to the lower end of the rocking element. The stride-adjusting unit includes a threaded rod and a carrier. The threaded rod is supported on the frame. The carrier is connected to the upper end of the rocking element and formed with a screw hole for receiving the threaded rod so that the threaded rod can rotate to move the carrier and the upper end of the rocking element to adjust a stride of the elliptical exercise machine.

Abstract: An elliptical trainer includes a base, a post, a circular movement unit, two elliptical movement units and a stride-adjusting device. The post and the circular movement unit are supported on the base. Each elliptical movement unit includes a swing bar and a pedal carrier. The pedal carrier includes a front end pivotally connected to a lower end of the swing bar and a rear end pivotally connected to the circular movement unit. The stride-adjusting device includes a power unit and a lever set. The power unit is supported on the post. The lever set includes a middle portion pivotally connected to the post, an end pivotally connected to the power unit, and another end pivotally connected to the swing bars. The power unit is operable to pivot the lever set to move upper ends of the swing bars to change the strides of the elliptical movement units.

Abstract: A treadmill includes a base, a platform, a universal joint, two elevators and two telescopic elements. The universal joint is used to connect a rear portion of the base to a rear portion of the platform. Each of the elevators includes a post supported on a front portion of the base and a carriage movably supported on the post. Each of the telescopic elements includes an end connected to a front portion of the platform and another end connected to the carriage of a corresponding one of the elevators.

Abstract: An elliptical exercise machine includes a frame, an impedance unit, two linkage units and a stride-adjusting unit. The impedance unit includes a flywheel supported on the frame and two cranks connected to the flywheel. Each linkage unit includes a rocking element and a moving element. The rocking element includes an upper end and a lower end. The moving element includes a rear end and a front end connected to the lower end of the rocking element. The stride-adjusting unit includes a threaded rod and a carrier. The threaded rod is supported on the frame. The carrier is connected to upper end of the rocking element and formed with a screw hole for receiving the threaded rod so that the threaded rod can rotate to move the carrier and the upper end of the rocking element to adjust a stride of the elliptical exercise machine.

Abstract: An elliptical trainer includes a base, a post, a circular movement unit, two elliptical movement units and a stride-adjusting device. The post and the circular movement unit are supported on the base. Each elliptical movement unit includes a swing bar and a pedal carrier. The pedal carrier includes a front end pivotally connected to a lower end of the swing bar and a rear end pivotally connected to the circular movement unit. The stride-adjusting device includes a power unit and a lever set. The power unit is supported on the post. The lever set includes a middle portion pivotally connected to the post, an end pivotally connected to the power unit, and another end pivotally connected to the swing bars. The power unit is operable to pivot the lever set to move upper ends of the swing bars to change the strides of the elliptical movement units.