A linear powered input device that utilizes linear input from a user and converts the linear input to rotational energy to perform work. The linear input is generated by lever arms having a slotted attachment at a pivot point that allows a free end of the lever arms to move linearly rather than in an arcuate path. The lever arms are connected to a power transmission mechanism that wraps around one or more drive wheels having one-way bearings mounted on one or more output shafts. The output shafts can be connected to any type of auxiliary device to perform the desired work. Output wheels may be mounted on the output shafts and operatively connected by a transmission link that allows linear motion of any lever arm in any allowable direction to cause the output shaft to rotate in the same rotational direction so as to receive continuous input and/or generate continuous output.

An exercise device has guide links each having a first attachment point pivotally attached to an upper part of a frame. Foot support links each have a foot receiving area to support a user's foot and are pivotally connected to a second attachment point of one of the guide links so that when the guide links pivot relative to the frame, the foot support links move in a path of travel having a horizontal component of motion. A first and a second control pulley are each pivotally connected to a respective one of the guide links and offset from the first pivot axis so as to move in an arc. A first and a second flexible element each couple the vertical drive assembly to a respective one of the foot support links. Each flexible element has a midportion extending about a respective one of the control pulleys.

A linear powered input device that utilizes linear input from a user and converts the linear input rotational energy to perform work. The linear input is generated by lever arms having a slotted attachment at a pivot point that allows a free end of the lever arms to move linearly rather than in an arcuate path. The lever arms are connected to a power transmission mechanism that wraps around one or more drive wheels having one-way bearings mounted on one or more output shafts. The output shafts can be connected to any type of auxiliary device to perform the desired work. Output wheels may be mounted on the output shafts and operatively connected by a transmission link that allows linear motion of any lever arm in any allowable direction to cause the output shaft to rotate in the same rotational direction so as to receive continuous input.

An exercise apparatus comprising a foot support movable by the user on the frame back and forth through any one of a plurality of complete, reproducible and different arc segments of a master arcuate path, the foot support being interconnected to an arc segment selection device that is manually actuatable to enable the user to manually select any one of the plurality of different arc segments, the foot support being interconnected to an arm having a handle manually graspable by the user to reduce or increase power or energy required by the user to move the foot support.

A linear powered input device that utilizes linear input from a user and converts the linear input rotational energy to perform work. The linear input is generated by lever arms having a slotted attachment at a pivot point that allows a free end of the lever arms to move linearly rather than in an arcuate path. The lever arms are connected to a power transmission mechanism that wraps around one or more drive wheels having one-way bearings mounted on one or more output shafts. The output shafts can be connected to any type of auxiliary device to perform the desired work. Output wheels may be mounted on the output shafts and operatively connected by a transmission link that allows linear motion of any lever arm in any allowable direction to cause the output shaft to rotate in the same rotational direction so as to receive continuous input.

An elliptical trainer comprises a frame set, two first transmission rods, two second transmission rods, two footboard assemblies, a holding flywheel assembly, a stand flywheel assembly, and two eccentric link rods. When a user is stepping the two footboard assemblies and taking exercise with elbows on the two second transmission rods, the two footboard assemblies may be stepped up and down to recycle and each second transmission rod may be rotated to reciprocate along an arc and centered in a stand ear. At this time, each drag rod of two stand ears arranged right and left may pull the corresponding eccentric link assembly to rotate 360 degree and the torque of the third flywheel may not overlap each drag rod of each eccentric link assembly vertically. Accordingly, the arrangement of each eccentric link assembly may prevent the swing operation from being stuck to pause or operate unsmoothly.

A stepping exercise machine has a frame, a transmission assembly, a resistance fan and two stepping assemblies. The frame has a base, a supporting bar, a mounting bracket and an oblique auxiliary bar. The transmission assembly is mounted on the supporting bar of the frame. The resistance fan is mounted rotatably on the transmission assembly and is able to be driven by the transmission assembly to create airflow. The stepping assemblies are mounted on the frame, are connected to the transmission assembly and are able to drive the transmission assembly to rotate the resistance fan. The resistance fan improves exercise intensity of a user.

A compounded fitness trainer, including a base, on which a loading device is pivoted; a pair of first driving bars pivoted on the base for swinging; a pair of second driving bars pivoted on the base for swinging; a pair of first linkages respectively pivoted on the second driving bars and opposite sides of the loading device; and a pair of second linkages respectively pivoted on the first driving bars and the first linkages wherein the first driving bars are moved by the second driving bars when the second driving bars are moved, and the second driving bars are moved by the first driving bars when the first driving bars are moved whereby moving the first driving bars and/or the second driving bars may train different muscles.

An exercise device comprises a frame, two first swing arms, two second swing arms, two pedals, a resistance device, two cranks, two link rods, a lever bracket, two rock rods, and an adjusting device. Each first swing arm has a first end coupling with the frame and a second end coupling with a first end of one second swing arm, which has a second end coupling with one pedal. Each crank has a first end coupling with the resistance device and a second end coupling with a first end of one link rod, which has a second end coupling with one second swing arm. The lever bracket pivotally couples with the frame and has two fulcrums. Each rock rod has a first end coupling with one fulcrum and a second end coupling with one second swing arm. The adjusting device adjusts the distance between the fulcrums and an axle.