(under subclass 373) Subject matter wherein the securing means comprises a spring or a member biased by a spring such that the spring or member is normally in a secured position with respect to the open end of the hook.
(1) Note. The structure-to-be-secured(*) with the hook usually engages and moves the spring or member to the unsecured position and then allows the spring or member to return to the secured position thereby securing the struc-ture-to-be-secured(*).
