초록 ▼

A power drive system to augment pedalling of a bicycle including a reversible magnetically balanced electromagnetic field positioned in proximity to one wheel of the bicycle, at least one permanent magnet mounted on the wheel to pass through the electromagnetic field when the wheels are rotated by c

A power drive system to augment pedalling of a bicycle including a reversible magnetically balanced electromagnetic field positioned in proximity to one wheel of the bicycle, at least one permanent magnet mounted on the wheel to pass through the electromagnetic field when the wheels are rotated by conventional pedalling, and a reversing switch responsive to the position of the permanent magnet to alternate the polarity of the electromagnetic field thereby alternately attracting the permanent magnet into the electromagnetic field and thereafter repelling the permanent magnet outwardly from the electromagnetic field. A reed type switch is positioned to respond to the movement of the permanent magnet to reverse the polarity of the electromagnetic field. A proximity switch is triggered by conventional pedalling to turn off the power when pedalling ceases. Thus, the power drive system assists in the pedalling but does not provide power when the cyclist is coasting.

대표청구항 ▼

In a power drive system for a vehicle, the vehicle including conventional frame, front wheels and rear wheels, the power drive system comprising: a reversible polarity electromagnetic field positioned in proximity to one wheel of the vehicle; at least one permanent magnet mounted on said one wheel f

In a power drive system for a vehicle, the vehicle including conventional frame, front wheels and rear wheels, the power drive system comprising: a reversible polarity electromagnetic field positioned in proximity to one wheel of the vehicle; at least one permanent magnet mounted on said one wheel for rotation therewith, said permanent magnet positioned to move through the electromagnetic field when said one wheel is rotated; and reversing switch means responsive to the position of the permanent magnet relative to the electromagnetic field to alternate the polarity of the electromagnetic field when the permanent magnet moves into the center of the electromagnetic field; so that upon rotating said one wheel, the permanent magnet actuates the reversing switch means to repeatedly alternate the polarity of the electromagnetic field to alternately attract the permanent magnet into the center of the electromagnetic field and thereafter repel the permanent magnet outwardly from the electromagnetic field to assist in the rotation of the wheel, said vehicle including pedals to rotate said wheels, and further including a proximity switch actuated by each rotation of the pedals for turning off the electromagnetic field, except when the proximity switch is repeatedly actuated by continuing rotation of the pedals, to turn off the power drive system.