Patent US4485506A successfully refreshed from Google Patents.
US4485506A
Expired / Lapsed
US
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Coil spring construction
Assignee: Dreamwell Ltd
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Filing: 1983-04-07
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Granted: 1984-12-04
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Expires: 2003-04-07
Abstract
Abstract A coil spring construction is provided for incorporation within a mattress or cushion. The construction includes a plurality of independently mounted pocketed coil springs. Resilient stabilizers are provided between the springs to maintain their axial positions. The spring pockets are formed by the sealing of first and second sheets to each other in a substantially circular configuration about the axis of each spring. Spring height is determined by the inside diameter of the seal.
Inventors
- 👤 Walter Stumpf
- 👤 Paul J. Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:34
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/04; A47C27/06; A47C27/063; A47C27/064
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
191 words
A coil spring construction comprising: a fabric layer defined by interconnected top and bottom sheets and defining a plane; a plurality of spring pockets defined by said top and bottom sheets and extending substantially perpendicularly from said plane; at least one spring positioned within each of said spring pockets and maintaining said spring pockets taut; said spring pockets being separated from each other by planar portions of said fabric layer thereby allowing said springs to act independently from one another during compression or expansion; and stabilizing means including a resilient layer having a plurality of holes therein, said spring pockets each extending at least partially within one of said holes and being maintained in said substantially perpendicular positions with respect to said plane; said spring pockets extending both above and below said plane, said stabilizing means including first and second resilient layers each having a plurality of holes therein, said holes in said first resilient layer receiving portions of said spring pockets extending from one side of said plane and said holes in said second resilient layer receiving portions of said spring pockets extending from the other side of said plane.
Claim 2
Dependent Claim
191 words
A coil spring construction comprising: a fabric layer defined by interconnected top and bottom sheets and defining a plane; a plurality of spring pockets defined by said top and bottom sheets and extending substantially perpendicularly from said plane; at least one spring positioned within each of said spring pockets and maintaining said spring pockets taut; said spring pockets being separated from each other by planar portions of said fabric layer thereby allowing said springs to act independently from one another during compression or expansion; and stabilizing means including a resilient layer having a plurality of holes therein, said spring pockets each extending at least partially within one of said holes and being maintained in said substantially perpendicular positions with respect to said plane; said spring pockets extending both above and below said plane, said stabilizing means including first and second resilient layers each having a plurality of holes therein, said holes in said first resilient layer receiving portions of said spring pockets extending from one side of said plane and said holes in said second resilient layer receiving portions of said spring pockets extending from the other side of said plane.
Claim 3
Dependent Claim
30 words
A coil spring construction as defined in claim 1 wherein said top and bottom sheets are connected by substantially circular lines of connection extending about the axis of each spring.
Claim 4
Dependent Claim
23 words
A coil spring construction as defined in claim 2 wherein said top and bottom sheets are thermally welded by said substantially circular lines.
Claim 5
Dependent Claim
22 words
A coil spring construction as defined in claim 1 wherein said plane substantially intersects the midpoints of the axes of said springs.
Claim 6
Dependent Claim
41 words
A coil spring construction as defined in claim 1 including a third resilient layer positioned upon the ends of said spring pockets on one side of said plane, said first, second, and third resilient layers being substantially parallel to each other.
Claim 7
Dependent Claim
44 words
A coil spring construction as defined in claim 5 including a fourth resilient layer positioned upon the ends of said spring pockets on the other side of said plane, said fourth resilient layer being substantially parallel to said first, second, and third resilient layers.
Claim 8
Dependent Claim
19 words
A coil spring construction as defined in claim 6 wherein each of said resilient layers is of polyurethane foam.
Claim 9
Dependent Claim
38 words
A coil spring construction as defined in claim 1 including a plurality of rows of spring pockets and a plurality of rows of discrete welds, each weld including four arcuate sides, extending between said rows of spring pockets.
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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) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |