Bed construction with reduced sagging
View Patent ↗A bed construction having a one-sided mattress assembly supported on a rigid foundation. The one-sided mattress assembly includes a core of pocketed coil springs having a layer of resiliently compressible material covering the upper surface thereof and having a bottom surface constructed of a substantially rigid material without a compressible layer. The core of coil springs is attached to the bottom surface around its periphery. The foundation has a rigid inner construction and a noncompressible top layer. The bed construction reduces the amount of compressible padding in the mattress by one-half and consequently the mattress is capable of exhibiting a substantial reduction in the amount of permanent deflection in use.
1. A one-sided inner spring mattress assembly comprising:
a central core comprising a wire spring assembly;
an upper padding layer extending over a top surface of the core and defining a sleeping surface;
a lower rigid layer disposed underlying the central core, and
a layer of sheeting material disposed over the exterior side of the lower layer to define an exterior, non-sleeping surface,
wherein the lower layer is a high density foam that is resistant to compaction by the wire spring assembly of the central core, thereby reducing permanent deflection of the sleeping surface by a user.
2. The mattress assembly of claim 1 wherein the lower layer has a firmness of greater than 30 ILD.
3. The mattress assembly of claim 2 wherein the lower layer has a density of approximately 1.85 lbs./cu. ft. and a firmness of approximately 55 ILD.
4. The mattress assembly of claim 1 wherein the central core comprises pocketed springs.
5. The mattress assembly of claim 1 wherein the core is surrounded by a lower border wire and is secured to said lower layer by attaching said border wire to said lower layer.
6. A one-sided inner spring mattress assembly according to claim 1 , wherein the lower layer has a firmness greater than 30 ILD and comprises a plurality of layers including a foam padding layer and a sheeting layer.
7. A one-sided inner spring mattress assembly according to claim 1 , wherein the layer of sheeting material is attached to a border on a side of the mattress.
8. A bed construction comprising:
a one-sided inner spring mattress assembly comprising:
a central core comprising a wire spring assembly;
an upper padding layer extending over a top surface of the core and defining a sleeping surface;
a lower rigid layer disposed underlying the central core;
a layer of sheeting material disposed over the exterior side of the lower layer to define an exterior, non-sleeping surface, and
a rigid foundation for supporting the mattress
wherein the lower layer is a high density foam that is resistant to compaction by the central core of springs.
9. The mattress assembly of claim 8 wherein the lower layer has a firmness of greater than 30 ILD.
10. The mattress assembly of claim 9 wherein the lower layer has a density of approximately 1.85 lbs./cu. ft. and a firmness of approximately 55 ILD.
11. The mattress assembly of claim 8 wherein the central core comprises pocketed springs.
12. The mattress assembly of claim 8 wherein the core is surrounded by a lower border wire to said lower layer by attaching said border wire to said lower layer.