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US4730358A
Expired / Lapsed
US
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Sinuous spring module box spring assembly
Assignee: L&P Property Management Co
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Filing: 1987-03-25
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Granted: 1988-03-15
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Expires: 2007-03-25
Abstract
Abstract A box spring assembly includes a base frame, a top wire grid and a plurality of sinuous wire springs interconnecting the top wire grid and the base frame. The sinuous wire springs each comprise a sinuous wire strip formed into a U-shaped configuration with the bottom of each U-shaped spring attached to the base frame and the free ends at the top of the U-shaped spring attached to the wire grid.
Inventors
- 👤 Henry Zapletal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:18
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/043; A47C23/0438; A47C23/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
343 words
A bedding foundation box spring comprising, a bottom, substantially rectangular, base frame having side and end members and slats extending between said side members, a substantially planar rectangular top wire grid, said grid comprising a border wire and first and second sets of wires, said border wire being of rectangular configuration and surrounding said first and second sets of wires, said first set of wires comprising a plurality of longitudinally extending, spaced, parallel wires and said second set of wires comprising a plurality of transversely extending, spaced, parallel wires, said first and second sets of wires intersecting one another and being welded together at their intersections, said first and second sets of wires being fixedly connected to said border wire, a plurality of coil springs interconnecting said bottom frame and said top grid, a plurality of sinuous wire springs interconnecting said base frame and said wire grid, said sinuous wire springs each comprising a sinuous spring strip made from wire bent back and forth to have oppositely facing edge loops interconnected by straight torsion bar sections, each of said strips being formed into a generally U-shaped configuration having substantially vertical legs interconnected by a substantially flat bottom section, said flat bottom section of each of said sinuous wire springs being fixedly secured to said base frame and the upper ends of said vertical legs of each of said sinuous springs being fixedly secured to said top wire grid, each of said vertical legs of each of said U-shaped sinuous wire springs consisting of three edge loops interconnected by a pair of straight torsion bars, the topmost one of the edge loops being connected to a third free end straight torsion bar, and said flat bottom section of each of said U-shaped sinuous wire springs consisting of a single edge loop and a pair of straight torsion bars connected to opposite ends of said single edge loop, a fabric pad overlying said top wire grid, and an upholstered covering surrounding said base frame, wire grid, border wire, sinuous wire springs, and said fabric pad.
Claim 2
Dependent Claim
343 words
A bedding foundation box spring comprising, a bottom, substantially rectangular, base frame having side and end members and slats extending between said side members, a substantially planar rectangular top wire grid, said grid comprising a border wire and first and second sets of wires, said border wire being of rectangular configuration and surrounding said first and second sets of wires, said first set of wires comprising a plurality of longitudinally extending, spaced, parallel wires and said second set of wires comprising a plurality of transversely extending, spaced, parallel wires, said first and second sets of wires intersecting one another and being welded together at their intersections, said first and second sets of wires being fixedly connected to said border wire, a plurality of coil springs interconnecting said bottom frame and said top grid, a plurality of sinuous wire springs interconnecting said base frame and said wire grid, said sinuous wire springs each comprising a sinuous spring strip made from wire bent back and forth to have oppositely facing edge loops interconnected by straight torsion bar sections, each of said strips being formed into a generally U-shaped configuration having substantially vertical legs interconnected by a substantially flat bottom section, said flat bottom section of each of said sinuous wire springs being fixedly secured to said base frame and the upper ends of said vertical legs of each of said sinuous springs being fixedly secured to said top wire grid, each of said vertical legs of each of said U-shaped sinuous wire springs consisting of three edge loops interconnected by a pair of straight torsion bars, the topmost one of the edge loops being connected to a third free end straight torsion bar, and said flat bottom section of each of said U-shaped sinuous wire springs consisting of a single edge loop and a pair of straight torsion bars connected to opposite ends of said single edge loop, a fabric pad overlying said top wire grid, and an upholstered covering surrounding said base frame, wire grid, border wire, sinuous wire springs, and said fabric pad.
Claim 3
Dependent Claim
35 words
The box spring of claim 1 wherein the coil springs are each generally conical in configuration and have their small ends attached to said bottom frame and their larger ends attached to said wire grid.
Claim 4
Dependent Claim
56 words
The box spring assembly of claim 1 wherein said slate extend transversely between said side members, said bottom section of said sinuous wire springs being attached to the top of said slats in the longitudinal center section of said box spring assembly so as to provide center firmness in the center section of said spring assembly.
Claim 5
Dependent Claim
23 words
The box spring of claim 1 wherein said sinuous wire springs are mounted above said side and end members of said bottom frame.
Claim 6
Dependent Claim
279 words
A bedding foundation box spring assembly comprising, a bottom, substantially rectangular, base frame having side and end members, a substantially planar rectangular top wire grid, said grid comprising a border wire and first and second sets of wires, said first set of wires comprising a plurality of longitudinally extending, spaced, parallel wires, said second set of wires comprising a plurality of transversely extending, spaced, parallel wires, the ends of both said first and second sets of wires being fixedly connected to said border wire, a plurality of coil springs interconnecting said base frame and said top wire grid, a plurality of sinuous wire springs interconnecting said base frame and said wire grid, said sinuous wire springs each comprising a sinuous spring strip made from wire bent back and forth to have oppositely facing edge loops interconnected by straight torsion bar sections, said strip being formed into a generally U-shaped configuration having substantially vertical legs interconnected by a flat bottom section, said flat bottom section of each of said sinuous wire springs being fixedly secured to said base frame and the upper ends of said vertical legs of each of said sinuous springs being fixedly secured to said top wire grid, and each of said vertical legs of each of said U-shaped sinuous wire springs consisting of three edge loops interconnected by a pair of straight torsion bars, the topmost one of the edge loops being connected to a third free end straight torsion bar, and said flat bottom section of each of said U-shaped sinuous wire springs consisting of a single edge loop and a pair of straight torsion bars connected to opposite ends of said single edge loop.
Claim 7
Dependent Claim
279 words
A bedding foundation box spring assembly comprising, a bottom, substantially rectangular, base frame having side and end members, a substantially planar rectangular top wire grid, said grid comprising a border wire and first and second sets of wires, said first set of wires comprising a plurality of longitudinally extending, spaced, parallel wires, said second set of wires comprising a plurality of transversely extending, spaced, parallel wires, the ends of both said first and second sets of wires being fixedly connected to said border wire, a plurality of coil springs interconnecting said base frame and said top wire grid, a plurality of sinuous wire springs interconnecting said base frame and said wire grid, said sinuous wire springs each comprising a sinuous spring strip made from wire bent back and forth to have oppositely facing edge loops interconnected by straight torsion bar sections, said strip being formed into a generally U-shaped configuration having substantially vertical legs interconnected by a flat bottom section, said flat bottom section of each of said sinuous wire springs being fixedly secured to said base frame and the upper ends of said vertical legs of each of said sinuous springs being fixedly secured to said top wire grid, and each of said vertical legs of each of said U-shaped sinuous wire springs consisting of three edge loops interconnected by a pair of straight torsion bars, the topmost one of the edge loops being connected to a third free end straight torsion bar, and said flat bottom section of each of said U-shaped sinuous wire springs consisting of a single edge loop and a pair of straight torsion bars connected to opposite ends of said single edge loop.
Claim 8
Dependent Claim
45 words
The box spring assembly of claim 5 wherein each of said free end torsion bars of said sinuous springs has an offset portion formed therein, and said offset portions of said free end torsion bars being fixedly secured to said wires of said wire grid.
Claim 9
Dependent Claim
46 words
The box spring assembly of claim 6 wherein said offset portion of at least some of said free end torsion bars are received within U-shaped recesses formed in said wires of said wire grid and are secured within said recesses by having said recesses crimped closed.
Claim 10
Dependent Claim
38 words
The box spring assembly of claim 5 wherein said sinuous wire springs are mounted above said side and end members of said bottom frame so as to provide increased edge firmness about the periphery of said spring assembly.
Claim 11
Dependent Claim
62 words
The box spring assembly of claim 5 wherein said base frame comprises a plurality of transverse slats extending between said side members, said bottom section of said sinuous wire springs being attached to the top of the slats in the longitudinal center section of said box spring assembly so as to provide center firmness in the center section of said spring assembly.
Claim 12
Dependent Claim
304 words
A bedding foundation box spring comprising, a bottom, substantially rectangular, base frame having side and end members and slats extending between said side members, a substantially planar rectangular top wire grid, said grid comprising a border wire and first and second sets of wires, said border wire being of rectangular configuration and surrounding said first and second sets of wires, said first set of wires comprising a plurality of longitudinally extending, spaced, parallel wires and said second set of wires comprising a plurality of transversely extending, spaced, parallel wires, said first and second sets of wires intersecting one another and being welded together at their intersections, said first and second sets of wires being fixedly connected to said border wires, a plurality of sinuous wire springs interconnecting said base frame and said wire grid, said sinuous wire springs each comprising a sinuous spring strip made from wire bent back and forth to have oppositely facing edge loops interconnected by straight torsion bar sections, each of said strips being formed into a generally U-shaped configuration having substantially vertical legs interconnected by a substantially flat bottom section, said flat bottom section of each of said sinuous wire springs being fixedly secured to said base frame and the upper ends of said vertical legs of each of said sinuous springs being fixedly secured to said top wire grid, and each of said vertical legs of each of said U-shaped sinuous wire springs consisting of three edge loops interconnected by a pair of straight torsion bars, the topmost one of the edge loops being connected to a third free end straight torsion bar, and said flat bottom section of each of said U-shaped sinuous wire springs consisting of a single edge loop and a pair of straight torsion bars connected to opposite ends of said single edge loop.
Claim 13
Dependent Claim
304 words
A bedding foundation box spring comprising, a bottom, substantially rectangular, base frame having side and end members and slats extending between said side members, a substantially planar rectangular top wire grid, said grid comprising a border wire and first and second sets of wires, said border wire being of rectangular configuration and surrounding said first and second sets of wires, said first set of wires comprising a plurality of longitudinally extending, spaced, parallel wires and said second set of wires comprising a plurality of transversely extending, spaced, parallel wires, said first and second sets of wires intersecting one another and being welded together at their intersections, said first and second sets of wires being fixedly connected to said border wires, a plurality of sinuous wire springs interconnecting said base frame and said wire grid, said sinuous wire springs each comprising a sinuous spring strip made from wire bent back and forth to have oppositely facing edge loops interconnected by straight torsion bar sections, each of said strips being formed into a generally U-shaped configuration having substantially vertical legs interconnected by a substantially flat bottom section, said flat bottom section of each of said sinuous wire springs being fixedly secured to said base frame and the upper ends of said vertical legs of each of said sinuous springs being fixedly secured to said top wire grid, and each of said vertical legs of each of said U-shaped sinuous wire springs consisting of three edge loops interconnected by a pair of straight torsion bars, the topmost one of the edge loops being connected to a third free end straight torsion bar, and said flat bottom section of each of said U-shaped sinuous wire springs consisting of a single edge loop and a pair of straight torsion bars connected to opposite ends of said single edge loop.
Claim 14
Dependent Claim
45 words
The box spring assembly of claim 10 wherein each of said free end torsion bars of said sinuous springs has an offset portion formed therein, and said offset portions of said free end torsion bars being fixedly secured to said wires of said wire grid.
Claim 15
Dependent Claim
46 words
The box spring assembly of claim 11 wherein said offset portion of at least some of said free end torsion bars are received within U-shaped recesses formed in said wires of said wire grid and are secured within said recesses by having said recesses crimped closed.
Claim 16
Dependent Claim
38 words
The box spring assembly of claim 10 wherein said sinuous wire springs are mounted above said side and end members of said bottom frame so as to provide increased edge firmness about the periphery of said spring assembly.
Claim 17
Dependent Claim
62 words
The box spring assembly of claim 10 wherein said base frame comprises a plurality of transverse slats extending between said side members, said bottom section of said sinuous wire springs being attached to the top of the slats in the longitudinal center section of said box spring assembly so as to provide center firmness in the center section of said spring assembly.
Claim 18
Dependent Claim
214 words
A sinuous wire spring for use in a bedding foundation having a bottom, substantially rectangular, base frame and a substantially planar rectangular top wire grid, said sinuous wire spring comprising a sinuous spring strip made from wire bent back and forth to have oppositely facing edge loops interconnected by straight torsion bar sections, said strip being formed into a generally U-shaped configuration having substantially parallel vertical legs interconnected by a flat section extending substantially perpendicular to said vertical legs, said flat section of each of said sinuous wire springs being adapted to be fixedly secured to one of said base frame and wire grid, the ends of said vertical legs remote from said flat section being adapted to be fixedly secured to the other of said base frame and grid, and each of said vertical legs of each of said U-shaped sinuous wire springs consisting of three edge loops interconnected by a pair of straight torsion bars, the endmost one of the edge loops remote from said flat section being connected to a third free end straight torsion bar, and said flat bottom section of each of said U-shaped sinuous wire springs consisting of a single edge loop and a pair of straight torsion bars connected to opposite ends of said single edge loop.
Claim 19
Dependent Claim
214 words
A sinuous wire spring for use in a bedding foundation having a bottom, substantially rectangular, base frame and a substantially planar rectangular top wire grid, said sinuous wire spring comprising a sinuous spring strip made from wire bent back and forth to have oppositely facing edge loops interconnected by straight torsion bar sections, said strip being formed into a generally U-shaped configuration having substantially parallel vertical legs interconnected by a flat section extending substantially perpendicular to said vertical legs, said flat section of each of said sinuous wire springs being adapted to be fixedly secured to one of said base frame and wire grid, the ends of said vertical legs remote from said flat section being adapted to be fixedly secured to the other of said base frame and grid, and each of said vertical legs of each of said U-shaped sinuous wire springs consisting of three edge loops interconnected by a pair of straight torsion bars, the endmost one of the edge loops remote from said flat section being connected to a third free end straight torsion bar, and said flat bottom section of each of said U-shaped sinuous wire springs consisting of a single edge loop and a pair of straight torsion bars connected to opposite ends of said single edge loop.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |