Patent ID: 7717410

Claim:
A method for producing springs with non-linear differentiable dependence of the absolute value of the external force |F| loading the spring on the spring deflection δ from an elastic solid body comprising at least the step of choosing values of the continuous parameters d, l, m, w in the following formula | F|= 1/ r[Γ 12 1 k 12 (δ−δ 0 )+Γ 24 1 k 24 (α−α 0 )+Γ 34 1 k 34 (β−β 0 )+Γ 13 1 k 13 (γ−γ 0 )] wherein: Γ 12 1 =−1; Γ 24 1 = dl sin γ/− dl sin γ+ dw cos δ sin γ+ dw sin δ cos γ; Γ 34 1 =lw sin γ/− dl sin γ+ dw cos δ sin γ+ dw sin δ cos γ; Γ 13 1 =−dw cos δ sin γ− dw sin δ cos γ+ lw sin δ/− dl sin γ+ dw cos δ sin γ+ dw sin δ cos γ; r is the arm of the force F.