US3833949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlaced wire locking apparatus for coiled box spring construction
Assignee: Leggett and Platt Inc
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Filing: 1973-06-22
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Granted: 1974-09-10
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Expires: 1993-06-22
Abstract
Abstract An interlaced wire grid having mutually interlocking crimped wire segments are each wire intersection is disclosed for frictional engagement with the upper coil turns of coil springs. The grid forms a plurality of individual wire-bound perimeters each having a pair of parallel grid wire sections at equal distances from a supporting framework slat upon which the coil springs are secured, and adjacent parallel sections for completing the locking perimeter forming the frictional engaging surfaces. During assembly parallel wires of the grid may be deformed to admit the top coil and thereafter restored into locking engagement wire-to-wire as well as coil-to-wire perimeter to restrain coil spring movement.
Inventors
- 👤 J Piliero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:51
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/05; A47C23/0522
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
A coil spring anchoring arrangement for securing the top turn of a coil spring comprising a grid of wires having at least a first pair of wires in spaced apart relation and a second pair of wires transverse to said first pair of wires in spaced apart relationship lying substantially in the same respective plane, each of said wires of said first and second pairs of wires having mutually interlocking surfaces at the points of intersection of said first pair of wires with said second pair of wires, and opposite wire segments of said first pair of wires between said points of intersection being at a different plane elevation from said adjacent wire segments of said second pair of wires thereby defining an interlocking coil spring securing member.
Claim 2
Dependent Claim
128 words
A coil spring anchoring arrangement for securing the top turn of a coil spring comprising a grid of wires having at least a first pair of wires in spaced apart relation and a second pair of wires transverse to said first pair of wires in spaced apart relationship lying substantially in the same respective plane, each of said wires of said first and second pairs of wires having mutually interlocking surfaces at the points of intersection of said first pair of wires with said second pair of wires, and opposite wire segments of said first pair of wires between said points of intersection being at a different plane elevation from said adjacent wire segments of said second pair of wires thereby defining an interlocking coil spring securing member.
Claim 3
Dependent Claim
33 words
A coil spring anchoring arrangement in accordance with claim 1, wherein said mutually interlocking surfaces comprise a pre-formed deformation of each of said wires, and said deformation is substantially of a sinusoidal shape.
Claim 4
Dependent Claim
22 words
A coil spring anchoring arrangement in accordance with claim 1, wherein alternate contiguous segments of each wire are at differing planar elevations.
Claim 5
Dependent Claim
129 words
A combined coil spring anchoring arrangement for securing a coil spring within a furniture framework comprising a holding arrangement for a bottom turn of said coil spring comprising a substantially U-shaped member which is adapted to be driven through said framework and thereafter shaped to form clenching fingers to retain said bottom turn, a cooperating holding arrangement for a top turn of said coil spring comprising an interlaced wire grid having mutually interlocking crimped surfaces at equal intervals along each wire of said grid, said grid forming at least one four sided wire perimeter with corners at said interlocking surfaces, and opposite wire sides of said perimeter being at a different planar elevation than said remaining wire sides thereby defining an interlocking surface for retention of said top turn.
Claim 6
Dependent Claim
129 words
A combined coil spring anchoring arrangement for securing a coil spring within a furniture framework comprising a holding arrangement for a bottom turn of said coil spring comprising a substantially U-shaped member which is adapted to be driven through said framework and thereafter shaped to form clenching fingers to retain said bottom turn, a cooperating holding arrangement for a top turn of said coil spring comprising an interlaced wire grid having mutually interlocking crimped surfaces at equal intervals along each wire of said grid, said grid forming at least one four sided wire perimeter with corners at said interlocking surfaces, and opposite wire sides of said perimeter being at a different planar elevation than said remaining wire sides thereby defining an interlocking surface for retention of said top turn.
Claim 7
Dependent Claim
33 words
A combined coil spring anchoring arrangement in accordance with claim 4, wherein said crimped surfaces are adapted to be held in interlocking engagement when said top turn is installed within said wire perimeter.
Claim 8
Dependent Claim
52 words
A combined coil spring anchoring arrangement in accordance with claim 4, wherein said crimped surfaces take the form of an upper curved section and a contiguous lower curved section, and interlocking engagement occurs when said lower curved section of one wire is linked with an upper curved section of a transverse wire.
Claim 9
Dependent Claim
24 words
A coil spring anchoring arrangement in accordance with claim 1, wherein said mutually interlocking surfaces comprise a pre-formed deformation of each of said wires.
References Cited (Backward Citations)
US670211A
Cited
US3777322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |