US4047254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mattress construction
Assignee: Individual
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Filing: 1976-04-08
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Granted: 1977-09-13
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Expires: 1996-04-08
Abstract
Abstract A mattress construction comprises an intermediate layer of a semi rigid wave shaped resin material and with a top layer overlying the intermediate layer made of a resilient foamed resin material and a lower layer made of a resilient foamed resin material having a greater elastic restoring force than the upper layer. The greater elastic foamed restoring force may be accomplished by the increased density of the material being employed or by making the material of distinct substances giving the desired elastic characteristics. In one embodiment an electrified body in the form of a blanket is interposed between the intermediate layer and the top or upper layer.
Inventors
- 👤 Mituyoshi Hamasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:18
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/14; A47C27/15; A47C27/142; A47C27/144; A47C27/146; A47C27/148; A61; A61G; A61G7/00; A61G7/05; A61N; A61N1/00; A61N1/10; Y; Y10; Y10S; Y10S5/00; Y10S5/944
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A mattress construction comprising an intermediate layer of a semi-rigid resin material having top and bottom surfaces with continuous outwardly projecting wave formations adjacent inwardly projecting concavities with the concavities of the bottom surface having a larger radiuus of concavities than that of the top surface and being formed in vertical alignment below the wave-shaped formations of said top surface, a top layer overlying said intermediate layer made of a resilient foam resin material and having a resiliency so as to become restored to its original shape after unloading, said top surface having a multiplicity of projections formed thereon in a regular spaced-apart pattern with concavities between adjacent projections, and a lower layer of a foamed resin material having a greater elastic restoring force than said top located below said intermediate layer.
Claim 2
Dependent Claim
132 words
A mattress construction comprising an intermediate layer of a semi-rigid resin material having top and bottom surfaces with continuous outwardly projecting wave formations adjacent inwardly projecting concavities with the concavities of the bottom surface having a larger radiuus of concavities than that of the top surface and being formed in vertical alignment below the wave-shaped formations of said top surface, a top layer overlying said intermediate layer made of a resilient foam resin material and having a resiliency so as to become restored to its original shape after unloading, said top surface having a multiplicity of projections formed thereon in a regular spaced-apart pattern with concavities between adjacent projections, and a lower layer of a foamed resin material having a greater elastic restoring force than said top located below said intermediate layer.
Claim 3
Dependent Claim
25 words
A mattress according to claim 1, including a slit defined in the tops of the concave portions on the bottom surface of said intermediate layer.
Claim 4
Dependent Claim
25 words
A mattress according to claim 1, including a blanket of material forming an electrical power device disposed on the top surface of said intermediate layer.
Claim 5
Dependent Claim
64 words
A mattress according to claim 1, wherein the density of said top layer is less than the density of said bottom layer, a cover enclosing said layers, said intermediate layer having concavities aligned with said projections of said top layer, said top layer being formed of a separate multiplicity of polyurethane portions and said upper and bottom layers being bonded to said intermediate layer.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |