Wire mat assembly for a box spring

Claim 2

In a wire spring assembly, a rectangular border frame having first and second formed wire members provided with integral locking sections releasably interlocked with one another, one locking section of each pair of interlocked locking sections of said members having longitudinally spaced first and second recessed portions, the other locking section of said pair of interlocked sections having a first part extending through said first recessed portion and a second part extending from said first part through said second recessed portion.

Claim 3

The structure defined in claim 1, wherein said recessed portions are formed by coplanar offsets in said one locking section, said first part of said other locking section extending through said first recessed portion from one side of said one locking section to the other and said second part extending from said first part back across said one locking section to said one side thereof and then through said second recessed portion.

Claim 4

The structure defined in claim 2, wherein said offsets and said first part are V-shape, V-shaped.

Claim 5

The structure defined in claim 2, wherein said coplanar offsets are of inverted generally V-shaped, said first part is of generally V-shape, and said second part is of generally L-shape.

Claim 6

In a wire spring assembly, a rectangular border frame having elongated side and end formed wire border members, laterally spaced first elongated outside formed wire spring elements extending between and connected to said end border members, laterally spaced second elongated outside formed wire spring elements extending between and connected to said side border members in crossing relation to said first outside spring elements, and inside formed wire spring elements at the points of crossing of certain of said outside spring elements for supporting both outside spring elements at each such crossing point and having integral locking sections releasably interlocked with both outside spring elements at each such crossing point.

Claim 7

In a wire spring assembly, a rectangular border frame having elongated side and end formed wire border members, laterally spaced first elongated outside formed wire spring elements extending between and connected to said end border members, laterally spaced second elongated outside formed wire spring elements extending between and connected to said side border members in crossing relation to said first outside spring elements, and inside formed wire spring elements at the points of crossing of certain of said outside spring elements for supporting both outside spring elements at each such crossing point and having integral locking sections releasably interlocked with both outside spring elements at each such crossing point.

Claim 8

The structure defined in claim 5, wherein said locking section of each inside formed wire spring element includes a locking bar engaging the underside of the lower one of a pair of crossing outside spring elements at one side of said point of crossing, and a terminal portion extending from said locking bar and looped around said last-mentioned outside spring elements at said point of crossing, being extended over the upper outside spring element at the point of crossing and under said lower outside spring element at the other side of the point of crossing.

Claim 9

The structure defined in claim 5, wherein the locking section of each inside spring element includes a horizontal rectangular frame having two opposite frame bars engaged under the lower one of two crossing outside spring elements on opposite sides of a crossing point, a third bar connecting the first two bars and extending over the upper one of the two outside spring elements adjacent said crossing point and a fourth bar opposite said third bar, said fourth bar being connected to one only of said first and second bars and hooked over said upper one of said crossing outside spring elements at the side of said crossing point opposite said third bar.

Claim 10

The structure defined in claim 7, wherein said first and second bars have aligned downward offsets of V-shape in which said lower one of said crossing outside spring elements is seated, said third bar has an upward offset of inverted V-shape in which said upper one of said crossing outside spring elements is seated, and said fourth bar has a downturned terminal portion hooked over said upper one of said crossing outside spring elements.

Claim 11

The structure defined in claim 8, wherein each inside spring element has a depending portion extending from the locking bar thereof in which the wire is bent back and forth into a sinuous form having straight lengths of spacer bars joined to straight lengths of torsion bars and formed to substantially V-shaped fishmouth configuration.

Claim 12

In a wire spring assembly, a rectangular border frame having elongated side and end formed wire border members, laterally spaced first elongated outside formed wire spring elements extending from one end border member to the other, and laterally spaced second elongated outside formed wire spring elements extending from one side border member to the other in crossing relation to said first outside spring elements, said outside spring elements and said border members being provided with integral locking sections releasably interlocked with one another, said outside spring elements having integral supporting sections extending from said locking sections below said side and end border members.

Claim 13

In a wire spring assembly, a rectangular border frame having elongated side and end formed wire border members, laterally spaced first elongated outside formed wire spring elements extending from one end border member to the other, and laterally spaced second elongated outside formed wire spring elements extending from one side border member to the other in crossing relation to said first outside spring elements, said outside spring elements and said border members being provided with integral locking sections releasably interlocked with one another, said outside spring elements having integral supporting sections extending from said locking sections below said side and end border members.

Claim 14

The structure defined in claim 10, wherein the border member locking section of each pair of interlocked locking sections of said border members and outside spring elements has a downward offset, the outside spring element locking section of said pair having a first portion extending outwardly under said border member locking section at a point spaced from said offset and looped up and over said border member locking section, and a second portion extending from said first portion downwardly along the inner side of said border member locking section to an outwardly looped portion behind said offset.

Claim 15

The structure defined in claim 11, wherein said downward offset is of generally V-shape, said border member locking section has an offset of inverted generally V-shape spaced from said first-mentioned offset and under which said first portion of said outside spring element locking section is extended as aforesaid, and a suppoRt bar extending from said outwardly looped portion under said one border member locking section.

Claim 16

The structure defined in claim 10, wherein the border member locking section of each pair of interlocked locking sections of said border members and outside spring elements has portions of inverted V-shape connected by a V-shaped portion, the outside spring element locking section of said pair having a first portion extending outwardly under said border member locking section at a point spaced from but adjacent to one of said inverted V-shaped portions and looped inwardly behind and then outwardly through said one inverted V-shaped portion, and a second portion extending from said first portion and looping around the outer side of said V-shaped portion and then leading to a support bar extending inwardly through the other of said inverted V-shaped portions.

Claim 17

The structure defined in claim 13, wherein each border member locking section has another portion of inverted V-shape under which said first portion of said outside spring element locking section extends as aforesaid, all of said V-shaped and inverted V-shaped portions of said border member locking section being disposed in a common vertical plane, said first and second portions and said support bar of said outside spring element locking section being disposed in a common horizontal plane.

Claim 18

The structure defined in claim 14, wherein said supporting section depends from said support bar being bent back and forth in a sinuous form having straight lengths of spacer bars joined to straight lengths of torsion bars and formed to substantially V-shaped fishmouth-configuration.