Bicycle power meter

Details Bicycle power meter Bicycle power meter

1989-09-05

1991-07-16

Ruehl, Charles A.

Measuring and testing

Muscular force

7386228, 7386234, A61B 522, G01L 324

Patent

active

050314556

ABSTRACT:
A bicycle power meter having components which replace the rear axle hub assembly of a conventional chain driven bicycle. Inner and outer hubs are coupled to the usual freewheel chain drive cluster and to the rear wheel, respectively. The hubs are interconnected by a plurality of torsion rods which transmit driving torque form the inner hub to the outer hub. The torsional deflection of the rods is evidenced by a change in the relative angular displacement between a pair of hub disks attached to the hubs, respectively. The rate of rotation of the outer hub disk reflects wheel speed. A sensor head converts the relative angular displacement between the disks, and the rate of rotation of the outer hub disk, into signals which are applied to a processing and display module that calculates and displays horsepower.

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