Tunturipyora Oy

Esko Kotamaki

The invention relates to a one-way clutch structure for a stationary exercise cycle, which structure comprises a flywheel journalled on an axle and a cog wheel for the transmission of the force created by treadling to said flywheel. Said one-way clutch structure allows, depending on the treadling velocity, the free rotation of the flywheel with respect to the cog wheel. In order to provide a one-way clutch structure of low manufacturing costs, the cog wheel is journaled on a first cylindrical surface formed in the center of the flywheel by means of a bushing member of plastic material. The coupling element is formed by a spring acting as a spring clutch known per se, which spring is fitted around the bushing member and a second cylindrical surface formed in the center, whereby the end of said spring which is on the side of the cog wheel is bent and locked in an opening provided on the cog wheel. A metal ring is fitted between the inner surface of the end of the bushing member which is on the side of the flywheel and the first cylindrical surface so as to prevent deformation of said bushing member.

One-way clutch structure for a stationary exercise cycle

Pedal

A bicycle ergometer, where with the aid of a spring balance the braking effect of a band brake on the rim of a flywheel is measured and the braking effect may be regulated. The band, spring and indicator are normally fastened to a ball-bearing fork in the hub of the wheel, thus the tightening of the band strains the bearings. The fluctations of the indicator caused by the uneven friction and the vibrations characteristic of the spring have been reduced by a hydraulic damper. In this invention the fork has been removed. The band, spring and indicator are fastened to a weight resting on the flywheel and steered by a groove on the rim of the wheel. The mass of the weight reduces the indicator fluctuations.

Growing community of inventors

Turku, Finland

Esko Kotamaki