Document Type and Number:
Japanese Patent JPS5049053
Kind Code:
A
Abstract:
A box spring assembly of the formed wire spring type comprising a plurality of spring members mounted on a supporting frame and connected together to form a spring deck disposed above the frame and yieldably movable toward the frame. Some or all of the springs are of an improved construction wherein each consists of a substantially horizontal body portion and depending end portions each of which comprises a plurality of angularly arranged connecting bars and substantially horizontal torsion bars. Alternate ones of the connecting bars are substantially closer to being horizontal in the unloaded condition of the springs than the remaining ones of the connecting bars, the remaining ones of the connecting bars extending upwardly from the alternate ones so that the remaining ones are more nearly vertical than the alternate ones. As a result, when the springs are subjected to downwardly directed loads, resistance to load is achieved by both twisting of the torsion bars and bending of some of the connecting bars.
Application Number:
JP2821774A
Publication Date:
May 01, 1975
Filing Date:
March 13, 1974
Export Citation:
International Classes:
A47C23/00; A47C7/35; A47C23/04; (IPC1-7): A47C7/28; F16F3/00
Domestic Patent References:
| JPS486588A | ||||
| JPS487951A |