Bicycle power meter
US5031455A · kind A · utility
Inventor
Key dates
| Filing date | Sep 5, 1989 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | Sep 5, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2220/54
- WIPO fieldTransport
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.