Concentric Arc Spline Rotational Spring

A planar rotational torsion spring comprising an inner ring nested within an outer ring and the rotational torsion spring further comprises at least one spline connecting the outer ring to the inner ring and the spline forms concentric arc segments between the outer ring and the inner ring.

A first planar rotational torsion spring comprising a number of n splines and achieving deflection of the arc segments with more stress than a second planar rotation torsion spring of the same load, material thickness and torsion spring diameter of the first torsion spring wherein the second torsion spring comprises n+1 splines.

A first planar rotational torsion spring comprising a number of n+1 splines and the first planar rotational torsion spring achieves a greater stiffness than a second rotational torsion spring comprising n splines and comprising the same material, material thickness and torsion spring diameter as the first planar rotational spring wherein more splines achieve greater stiffness than a spring with fewer splines.

A planar rotational torsion spring comprising an inner ring nested within an outer ring and the rotational torsion spring further comprises a plurality of splines wherein each spline comprises multiple arc segments wherein one arc segment of a first spline is fixed to the outer diameter of the inner ring and a different arc segment of the first spline is attached to the inner diameter of the outer ring.

A planar rotational torsion spring comprising an inner ring nested within an outer ring wherein the rotational torsion spring further comprises at least one spline connecting the outer ring to the inner ring and a spline forms concentric arc segments between the outer ring and the inner ring.

A planar torsion spring wherein the spring comprises a first outer ring, a second inner ring which is positioned within the first outer ring and possessing a same axis of rotation, the first outer ring connected to the second inner ring with one or more splines each extended in one or more concentric arcs to a maximum circumference relative to the position of the concentric arc between the first outer ring and the second inner ring and positioning the first outer ring, the second inner ring and the spline concentric arcs in the same plane.

A method of constructing a planar torsion spring wherein the spring comprises fabricating a first outer ring, fabricating a second inner ring which is positioned within the first outer ring and possessing a same axis of rotation, further connecting the first outer ring to the second inner ring with one or more splines, extending the spline in a plurality of concentric arcs, sequentially positioning each arc to a maximum circumferential length relative to its position between the first outer ring and second inner ring, fabricating the spline with the maximum number concentric arcs between the inner circumference of the first outer ring and the outer circumference of the second inner ring and positioning the first outer ring, the second inner ring and the concentric arcs of the spline in the same plane.