DEVICE FOR OBTAINING A PREDETERMINED SUBSTANTIALLY CONSTANT FORCE IN PARTICULAR FOR MUSCULAR TRAINING FROM NEARLY ZERO TO A MAXIMAL VALUE

摘要

The present invention relates to a device for obtaining a predetermined linear force, including a first elastic force means and a force output means in the form of a non-elastic, flexible elongated member, a force transformation means arranged between said first elastic force means and the force output means, such that a pulling of the force output means creates a tension in said first elastic force means, and wherein the force transformation means is arranged and designed such that the pulling force required on the force output means decreases with the distance the force output means is pulled, in that it includes a second elastic force means and a second force output means attached to said second elastic force means, wherein the pulling force required on the second force output means increases with the distance the force output means is pulled, that the two force output means are connected to each other such as to summarise the forces, in that the characteristics of the two elastic force means are chosen such that the pulling force is substantially constant during the pulling distance, and means for adjusting the substantially constant pulling force from substantially zero and upwards.