US3789440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring assembly
Assignee: Webster Spring Co Inc
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Filing: 1972-05-11
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Granted: 1974-02-05
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Expires: 1992-05-11
Abstract
Abstract A coiled spring structure comprising a wire frame to which there are attached spaced pairs of longitudinally and transversely extending wires providing at their intersections end supports for the ends of coiled springs and coiled springs having end loops provided with diametrically disposed, reversely bent segments adapted to be sprung into engagement with the wires at the seats.
Inventors
- 👤 H Garceau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:09
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/34; A47C7/347; A47C23/00; A47C23/04; A47C23/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A coiled spring for attachment to a grid in the formation of a spring assembly, said coiled spring having at one end an end loop of circular configuration and between the ends intermediate circular windings of substantially smaller diameter than said end loop; characterized in that said end loop has diametrically spaced, aligned, radially, inwardly projecting ears lying in the plane of the loop, said ears being of such length that the distance between the inner extremities thereof is greater than the diameter of the largest of the subjacent intermediate windings.
Claim 2
Dependent Claim
91 words
A coiled spring for attachment to a grid in the formation of a spring assembly, said coiled spring having at one end an end loop of circular configuration and between the ends intermediate circular windings of substantially smaller diameter than said end loop; characterized in that said end loop has diametrically spaced, aligned, radially, inwardly projecting ears lying in the plane of the loop, said ears being of such length that the distance between the inner extremities thereof is greater than the diameter of the largest of the subjacent intermediate windings.
Claim 3
Dependent Claim
86 words
A coiled spring comprising end loops of circular configuration joined by a plurality of intermediate convolutions arranged along an axis perpendicular to the end loops, the loop at one end being tied to the subjacent convolutions and containing diametrically spaced, aligned, radially, inwardly projecting ears extending inwardly therefrom in the plane of the end loop, characterized in that the inner extremities of the ears lie on a diameter which is less than that of the end loop and greater than that of the subjacent intermediate loops.
Claim 4
Dependent Claim
86 words
A coiled spring comprising end loops of circular configuration joined by a plurality of intermediate convolutions arranged along an axis perpendicular to the end loops, the loop at one end being tied to the subjacent convolutions and containing diametrically spaced, aligned, radially, inwardly projecting ears extending inwardly therefrom in the plane of the end loop, characterized in that the inner extremities of the ears lie on a diameter which is less than that of the end loop and greater than that of the subjacent intermediate loops.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |