US3681798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring interiors and articles combining spring interiors
Assignee: Slumberland Group Ltd
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Filing: 1970-06-30
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Granted: 1972-08-08
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Expires: 1990-06-30
Abstract
Abstract A spring interior has a main face, or an extension of a main face, which is non-planar and has varying contours determined at least in part by at least one stiff yet resilient former of wire, rod, strip or the like secured to the main face. Preferred formers have parallel limbs joined by an integral, transverse base. The limbs may be inserted into parallel helical wires of the spring interior if such are provided. The former may be bent before or after being secured to the spring interior. The spring interior may be heat-treated to relieve stresses after it is in its final shape.
Inventors
- 👤 Leslie Thomas Docker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:24
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A spring interior comprising a plurality of compressionspring elements disposed in an array, the ends of the spring elements defining at least part of first and second main faces, a plurality of helical wires disposed in said main faces of the spring interior, the helical wires linking adjacent compressionspring elements, at least the first main face being non-planar and having varying contours, and at least one stiff yet resiLient former of elongate but non-rectilinear shape, at least a part of which extends lengthwise of one of said helical wires in said first main face and determining at least to some extent the varying contours of that face.
Claim 2
Dependent Claim
107 words
A spring interior comprising a plurality of compressionspring elements disposed in an array, the ends of the spring elements defining at least part of first and second main faces, a plurality of helical wires disposed in said main faces of the spring interior, the helical wires linking adjacent compressionspring elements, at least the first main face being non-planar and having varying contours, and at least one stiff yet resiLient former of elongate but non-rectilinear shape, at least a part of which extends lengthwise of one of said helical wires in said first main face and determining at least to some extent the varying contours of that face.
Claim 3
Dependent Claim
82 words
A spring interior according to claim 1 in which there are a plurality of substantially parallel helical wires disposed in said first main face of the spring interior, and there are a plurality of formers each comprising two spaced substantially parallel limbs of non-rectilinear shape and a base integral with the limbs at one end of each former, the two substantially parallel limbs of each former being inserted into two of said substantially parallel helical wires disposed in said first main face.
Claim 4
Dependent Claim
46 words
A spring interior according to claim 2 in which parts of the limbs project from the helical wires to define an extension portion of said first main face, and the bases of the formers are mutually aligned to define the outer edge of said extension portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |