Mattress innerspring structure having coaxial coil units
AssigneeL&P Property Management Company
InventorThomas J. Wells
Life of this patent
Estimating the term…
Abstract
An innerspring structure for a mattress comprises a plurality of outer coils extending generally parallel with each other to collectively form top and bottom face surfaces of the innerspring structure. One or more of the outer coils has an inner coil of preferably similar shape wound within and generally coaxially with the respective outer coil. Helical lacing wire wraps adjacent end turns of the inner and outer coaxially aligned coils together to form reinforced coil units in an area of the innerspring structure to increase the firmness of an area of the mattress utilizing the invention. Helical lacing wire connects the coils of the structure together and connects the end turns of peripheral coils to a border wire surrounding the periphery of the structures at the top and bottom face surfaces.
Claims15
An innerspring structure for a mattress comprising:
- a plurality of adjacent outer coils extending generally parallel to one another and arranged in aligned rows, each outer coil having opposing end turns resting in top and bottom face surfaces of the innerspring structure;
- at least one inner coil extending between said top and bottom face surfaces and wound generally coaxially within one of said outer coils such that corresponding end turns of the inner and outer coils are adjacent one with the other at the top and bottom face surfaces;
- and
- a helical lacing wire wrapping together the adjacent end turns of the inner and outer coaxial coils and an end turn of an adjacent outer coil and connecting the coaxial inner and outer coils with the adjacent outer coil at a face surface of the spring interior for creating a reinforced coil unit at a position in the innerspring structure, said reinforced coil unit having generally equal strength along its length to provide generally equal support to the top and bottom face surfaces of the innerspring structure when placed therein.
A spring structure for use in an innerspring structure of a mattress comprising:
- an outer coil having opposing end turns, the end turns configured for resting in top and bottom face surfaces of the innerspring structure;
- an inner coil having a length for extending between said top and bottom face surfaces and wound generally coaxially within one of said outer coils such that corresponding end turns of the inner and outer coils are adjacent one with the other and are configured for placement at the top and bottom face surfaces;
- and
- a helical lacing wire wrapping together the adjacent end turns of the inner and outer coaxial coils for connecting the coaxial inner and outer coils together such that the coils are operable to move simultaneously in the innerspring structure and create a reinforced coil unit at a position in the innerspring structure, said reinforced coil unit having generally equal strength along its length to provide generally equal support to the top and bottom face surfaces of the innerspring structure when placed therein.
A method of forming an innerspring structure for a mattress comprising:
- placing a plurality of outer coils adjacent one another and generally parallel to each other such that opposing end turns of the coils collectively form top and bottom face surfaces of the innerspring structure;
- positioning at least one inner coil within one of said outer coils such that the inner coil is wound generally coaxially with the outer coil and the respective end turns of the inner and outer coils are adjacent one with the other at the top and bottom face surfaces;
- and
- wrapping a helical lacing wire around the end turns of the inner and outer coaxial coils and an end turn of an adjacent outer coil and connecting the coaxial inner and outer coils with the adjacent outer coil at a face surface of the innerspring structure for creating a reinforced coil unit at a position in the innerspring structure, said reinforced coil unit having generally equal strength along its length to provide generally equal support to the top and bottom face surfaces of the innerspring structure when placed therein.
Dependencies are inferred from the claim text.