Patent ID: 7156784
Filing Date: 2007-01-02
Classification: A63B

Abstract:
1. A device for obtaining a predetermined linear force, comprising: a first elastic force means; a first force output means in the form of a non-elastic, flexible elongated member; and a force transformation means arranged between said first elastic force means and the first force output means, such that a pulling of the first force output means creates a tension in said first elastic force means, wherein the force transformation means is arranged and designed such that the pulling force required on the first force output means decreases with a distance the first force output means is pulled, wherein said force transformation means includes an arm pivotably arranged to a shaft, said first elastic force means is attached to said arm, and said first force output means is attached to said arm with one end, wherein a first direction changing means is arranged in contact with said first force output means between said one end and a pulling end, and wherein a distance between a pivoting point and the attachment point of said first force output means and said arm is substantially equal to a distance between the pivoting point and said first direction changing means.