US3848283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mattress
Assignee: France Bed Co Ltd
•
Filing: 1973-01-04
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Granted: 1974-11-19
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Expires: 1993-01-04
Abstract
Abstract A mattress comprising a spring assembly consisting of numerous coil springs so arranged as to form a flat plane and frame wires fixed to the springs disposed on the periphery of said arrangement; a sheet of elastic material covering at least the top plane of the spring assembly and those portions of all the four sides of said assembly which are disposed near the corresponding upper edges; a frame-shaped elastic foamed block inserted in a compressed state into the void spaces left in the sides of the spring assembly; and outermost covering enveloping the whole outside of a mattress body.
Inventors
- 👤 M Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:31
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/04; A47C27/06; A47C27/066; A47C27/05; A47C27/053
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
227 words
A mattress comprising a plurality of coil springs juxtaposed side-by-side one another so as to form a flat plane, at least one frame wire fixed to said springs and running about the periphery of said flat plane to define a top plane and to form said coil springs into a unitary spring assembly, a sheet of an elastic material covering at least said top plane and having and edge portion covering only a portion of the side of said spring assembly and being formed with first surface means, second surface means opposing said first surface means in spaced relation thereto, said first surface means diverging outwardly with respect to the plane of said second surface means, said first and second surface means defining a void space around the side periphery of said spring assembly, an endless elastic stretchable foam block filling said void, said elastic foamed block being in its vertical plane in a state of compression, said elastic foamed block having a normal inner width or length, when at no degree of stretch, less than the length or width of said block in said void, whereby said endless block in said void is under forces which tend to draw said block inward said first and second surface means constituting means for exerting a vertical compression against said block and for retaining said block in said void.
Claim 2
Dependent Claim
227 words
A mattress comprising a plurality of coil springs juxtaposed side-by-side one another so as to form a flat plane, at least one frame wire fixed to said springs and running about the periphery of said flat plane to define a top plane and to form said coil springs into a unitary spring assembly, a sheet of an elastic material covering at least said top plane and having and edge portion covering only a portion of the side of said spring assembly and being formed with first surface means, second surface means opposing said first surface means in spaced relation thereto, said first surface means diverging outwardly with respect to the plane of said second surface means, said first and second surface means defining a void space around the side periphery of said spring assembly, an endless elastic stretchable foam block filling said void, said elastic foamed block being in its vertical plane in a state of compression, said elastic foamed block having a normal inner width or length, when at no degree of stretch, less than the length or width of said block in said void, whereby said endless block in said void is under forces which tend to draw said block inward said first and second surface means constituting means for exerting a vertical compression against said block and for retaining said block in said void.
Claim 3
Dependent Claim
74 words
A mattress according to claim 1 wherein the void space left in the sides of the spring assembly has a cross section whose upper and lower planes defined by said first and second surface means are progressively drawn nearer to each other toward the center of the mattress, and The foamed block has its inner angular portions cut away into a taper form so as to match the cross section of the void space.
Claim 4
Dependent Claim
20 words
A mattress according to claim 1 wherein the foamed block has its sides bored with a plurality of ventilation holes.
References Cited (Backward Citations)
US1238302A
Cited
US1865043A
Cited
US2826769A
Cited
US2940089A
Cited
US3089154A
Cited
US3178735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |