Mattress assembly with convertible topper

Abstract

A convertible mattress including a foundation unit, a support unit and a comfort unit. The foundation unit includes several spring elements that provide flexible support for an overlying grid which defines the foundation surface. The foundation unit may be supported by a bed frame which may further include side boards, a head board and foot board. The comfort unit, or innerspring, is located atop the foundation unit and contains several interconnected spring coils or a foam core structure. The top and bottom surface of the comfort unit contain minimal covering to provide a smooth surface over the ends of the coils of the innerspring. The comfort unit is located atop the support unit and has a generally horizontal top and bottom and generally vertical sides extending between the top and bottom that defines a central space containing support and cushioning components such as foam. A series of Velcro™ straps are attached to the perimeter of the support unit that connect to Velcro™ target straps located along the perimeter of the comfort unit. The straps secure the comfort unit to the support unit and enable quick and easy removal and replacement of the comfort unit. Different comfort units may contain different materials that have varying support characteristics. The comfort unit can be either one- or two-sided.

1 . A convertible mattress comprising:
 a foundation unit supported by a rectangular frame;   a support unit that sits atop the foundation unit having substantially the same shape, length and width dimensions as the foundation unit and having a tape edge located around an upper perimeter of the support unit;   a comfort unit that sits atop the support unit having substantially the same shape, length and width dimensions as the support and foundation units and having a generally horizontal top and bottom and generally vertical sides extending between the top and bottom that define a central space;   at least four attachment devices integrally attached to the tape edge and located around the upper perimeter of the support unit which extend upward and outward; and   at least four attachment devices attached at an upper edge and a lower edge to the perimeter of the comfort unit that join with the at least four attachment devices integrally attached to the tape edge located around the perimeter of the support unit to secure the comfort unit to the support unit.   
     
     
         2 . The convertible mattress of  claim 1 , wherein the support unit includes an innerspring made of a plurality of interconnected spring coils. 
     
     
         3 . The convertible mattress of  claim 1 , wherein the support unit includes a foam core structure. 
     
     
         4 . The convertible mattress of  claim 1 , wherein the comfort unit contains at least two layers of compressible, conformable material. 
     
     
         5 . The convertible mattress of  claim 1 , wherein the comfort unit contains at least one foam core layer. 
     
     
         6 . The convertible mattress of  claim 1 , wherein the comfort unit contains at least one layer selected from the group of moisture barriers, aeration promoters, and flame retardants. 
     
     
         7 . The convertible mattress of  claim 1 , wherein there the foundation unit is made of wood. 
     
     
         8 . The convertible mattress of  claim 1 , wherein the at least four attachment devices attached below the tape edge located around the upper perimeter of the support unit are Velcro™ hook tabs and the at least four attachment devices attached at an upper edge and a lower edge to the perimeter of the comfort unit are Velcro™ loop tabs. 
     
     
         9 . The convertible mattress of  claim 1 , wherein the at least four attachment devices attached below the tape edge located around the upper perimeter of the support unit are wider than the at least four attachment devices attached at an upper edge and a lower edge to the perimeter of the comfort unit. 
     
     
         10 . A convertible mattress comprising:
 a foundation unit having a rectangular frame on which are mounted a plurality of spring elements and an overlying grid that defines the surface foundation;   a support unit having a rectangular frame that sits atop the foundation unit having substantially the same length and width dimensions as the foundation unit that provides support for a sleeping surface;   a comfort unit having a rectangular frame that sits atop the support unit having substantially the same length and width dimensions as the support and foundation units and having a generally horizontal top and bottom and generally vertical sides extending between the top and bottom that define a central space;   at least four Velcro™ hook tabs integrally attached to the tape edge to the upper perimeter of the support unit which extends upward and outward; and   at least four Velcro™ loop tabs attached at an upper edge and a lower edge to the perimeter of the comfort unit that join with the at least four attachment devices integrally attached to the tape edge to the upper perimeter of the support unit to secure the comfort unit to the support unit.   
     
     
         11 . The convertible mattress of  claim 10 , wherein the support unit includes an innerspring made of a plurality of interconnected spring coils. 
     
     
         12 . The convertible mattress of  claim 10 , wherein the support unit includes a foam core structure. 
     
     
         13 . The convertible mattress of  claim 10 , wherein the comfort unit contains at least two layers of compressible, conformable material. 
     
     
         14 . The convertible mattress of  claim 10 , wherein the comfort unit contains at least one foam core layer. 
     
     
         15 . The convertible mattress of  claim 10 , wherein the comfort unit contains at least one layer selected from the group of: moisture barriers, aeration promoters, and flame retardants. 
     
     
         16 . The convertible mattress of  claim 10 , wherein the comfort unit is encapsulated in woven upholstery. 
     
     
         17 . The convertible mattress of  claim 10 , wherein the comfort unit contains at least one layer of material selected from the group of: woven cotton, polyester, wool, and synthetic cloth.