BOX SPRING HAVING IMPROVED COIL SPRING MODULES

摘要

A box spring for supporting a bedding mattress. The box spring includes a rectangular base frame, a plurality of modular spring elements mounted atop the base frame, and a wire grid mounted atop the modular spring elements. Each of the modular spring elements comprises a horizontal straight center section terminating in horizontal plane curved end sections, at least some of the curved end sections having single revolution coil springs extending vertically downwardly therefrom. The modular spring elements are arranged in parallel rows, said adjacent spring elements of each row having aligned straight center sections and overlapping curved sections. The overlapping curved center sections of adjacent modular spring elements are connected by transverse wires of the grid top, which transverse wires have generally U-shaped bights or hooks from therein received over the overlapping curved sections and crimped shut to secure adjacent modular spring elements of multiple rows of modular spring elements to one another.