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A concentric, isokinetic exercise apparatus providing accommodating resistance to the exercising user, while maintaining constant speed. The user exercises on a wheel, crank, lever or similar device. The power exerted by the user is applied directly or coupled by means of gears or chains to a rotati

A concentric, isokinetic exercise apparatus providing accommodating resistance to the exercising user, while maintaining constant speed. The user exercises on a wheel, crank, lever or similar device. The power exerted by the user is applied directly or coupled by means of gears or chains to a rotating brake assembly comprising a braking rotor and a threaded hub. The threaded hub meshes with a threaded axle, turned by a reference motor at a selected speed. When hub and axle rotate at the same speed, the hub does not change its axial position. Any difference of rotational speed between axle and hub results in axial movement of the hub. Whichever of the two speeds is the larger determines the direction of axial movement. If the speed of the hub exceeds that of the axle, the hub with its attached brake rotor is moved towards the brake stator, thereby causing braking action. Conversely, if the hub speed is lower than that of the axle, the brakes disengage and eventually, a switch will interrupt the power to the reference motor.

대표청구항 ▼

Muscular exercise apparatus, for maintaining a maximum speed independent of an exercise torque applied by an exercising person, comprising: a. a rotating exercise member to which said exercise torque is applied to the apparatus; b. an electric reference motor; c. a mounting frame; d. frictional brak

Muscular exercise apparatus, for maintaining a maximum speed independent of an exercise torque applied by an exercising person, comprising: a. a rotating exercise member to which said exercise torque is applied to the apparatus; b. an electric reference motor; c. a mounting frame; d. frictional braking means coupled between the exercise member and the mounting frame, for resisting said exercise torque; e. electrical switching means serially connected with the reference motor; f. mechanical speed comparator means coupled to said frictional braking means, said reference motor and said exercise member for translating a difference in the rotational speed of the reference motor and the exercise member into liner motion in said frictional braking means to control the frictional braking means, by increasing the braking torque of the frictional braking means as the speed of the exercise member exceeds the speed of said reference motor; and g. switch control means coupled to said electrical switching means and responsive to said linear motion of said comparator means for controlling the switching means, to interrupt power to the reference motor if the speed of the motor remains greater than the speed of the exercise member.