Bent wire spring module

Claim 1

A bent wire spring module for disposition between a rigid, rectangular base frame comprising spaced, parallel sides and ends and a wire grid frame comprising a rectangular border wire and transversely and longitudinally-crossing grid wires attached at their ends to the border wire and bent wire spring modules at each corner of the base frame and the grid frame, each comprising a unitary length of wire embodying right-angularly disposed lower and upper attaching means and a pair of vertical supports disposed therebetween, said lower attaching means comprising integrally-connected first lengths of wire disposed at substantially right angles to each other and substantially parallel to the respective sides at the corners of the base frame for attachment thereto, said upper attaching means comprising integrally-connected second lengths of wire of helical configuration at substantially right angles to each other each disposed helically about and substantially parallel to respective sides of the border wire at a corner of the grid frame for attachment thereto, each vertical support comprising lower and upper legs, said lower legs being connected at their lower ends to the lower attaching means, means comprising lateral extensions at the upper ends of the upper legs disposed at an angle thereto such as to abut the underside of the border wire, said lateral extensions being connected at one end to the upper ends of the upper legs and at the other ends to the helical lengths of wire and said lower and upper legs at their upper and lower ends respectively being connected to each other.