Apparatus for adjusting the spring characteristic of a helical spring

摘要

An apparatus for adjusting the spring characteristic of a helical spring has a manually actuatable adjusting element, which comprises a rotational support for the windings of a spiral spring. The apparatus further has a retaining member and an arresting member for retaining and securing the adjusting element in the adjusted positions. To provide a separate adjustability of the spring pitch and the spring biasing, the retaining member and arresting member are embodied such that the adjusting tang is rotatable without its axial position being varied, and is fixable in any rotated position.