US4827546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid mattress
Assignee: Individual
•
Filing: 1988-02-09
•
Granted: 1989-05-09
•
Expires: 2008-02-09
Abstract
Abstract A fluid containing mattress including exterior support in the form of side frames and a bottom support. Flexible, contractible bellows are distributed over the bottom support and are connected thereto. Tubing connects the bellows to adjacent bellows to permit fluid flow between them. A selected amount of fluid is provided in the bellows. A top cover including a cushion extends over the bellows. Coil springs are mounted on top of the bellows and support the top cover. Elastomeric members connect each coil spring to adjacent coil springs.
Inventors
- 👤 Milutin Cvetkovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:59
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/08; A47C27/085; A47C27/04; A47C27/06; A47C27/061; A47C27/062; A47C31/00; A47C31/12; A47C31/123; Y; Y10; Y10S; Y10S297/00; Y10S297/08
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
114 words
A fluid mattress comprising: (a) a frame structure; (b) support plates at the bottom of said mattress fixed to the frame structure and to each other; (c) accordion-like flexible bellows having their bottom ends fixed to the plates; (d) connecting tubing means for connection of said bellows to adjacent bellows to allow fluid flow; (e) fluid filling said bellows as a means by which the pressure is distributed among said bellows; (f) connecting tubing means for connection of said bellows to adjacent bellows to allow fluid flow; (g) coil springs mounted on top of said bellows; (h) elastomeric bands connecting said coil springs to adjacent springs; (i) a cover extending over the coil springs.
Claim 2
Dependent Claim
114 words
A fluid mattress comprising: (a) a frame structure; (b) support plates at the bottom of said mattress fixed to the frame structure and to each other; (c) accordion-like flexible bellows having their bottom ends fixed to the plates; (d) connecting tubing means for connection of said bellows to adjacent bellows to allow fluid flow; (e) fluid filling said bellows as a means by which the pressure is distributed among said bellows; (f) connecting tubing means for connection of said bellows to adjacent bellows to allow fluid flow; (g) coil springs mounted on top of said bellows; (h) elastomeric bands connecting said coil springs to adjacent springs; (i) a cover extending over the coil springs.
Claim 3
Dependent Claim
39 words
A fluid mattress as defined in claim 1 wherein said frame structure comprises two rectangular parts, one on the top, the other on the bottom, each having two parallel adjacent running bars forming one rectangular shape inside the other.
Claim 4
Dependent Claim
20 words
A fluid mattress as defined in claim 1 wherein said plates are connected to each other along interlocking edges thereof.
Claim 5
Dependent Claim
15 words
A fluid mattress as defined in claim 1 wherein said fluid is harmless to humans.
Claim 6
Dependent Claim
39 words
A fluid mattress as defined in claim 1 wherein said bellows are inflatable and made of plastics, said tubing means are made of plastics, and said bellows are arranged in rows and are adapted to support the human body.
Claim 7
Dependent Claim
31 words
A fluid mattress as defined in claim 1 wherein said connecting tubing means are made of plastics and allow said fluid to flow without obstruction from each bellow to adjacent bellows.
Claim 8
Dependent Claim
59 words
A fluid mattress as defined in claim 1 wherein said mattress has the ability to absorb pressure of protruding parts of a human body lying thereon and to transfer this pressure to concave parts of the body by fluid movement from depressed bellows to bellows that are not depressed and are situated underneath the concave parts of said body.
Claim 9
Dependent Claim
32 words
A fluid mattress as defined in claim 1 including means for changing the pressure inside the bellows so that the hardness of the mattress can be adjusted to suit different body weights.
Claim 10
Dependent Claim
16 words
A fluid mattress as defined in claim 1 wherein said mattress has sections of different hardness.
Claim 11
Dependent Claim
30 words
A fluid mattress as defined in claim 1 wherein said elastomeric bands prevent the coil springs from moving too far from each other and allow vertical movement of said bellows.
Claim 12
Dependent Claim
36 words
A fluid mattress as defined in claim 1 wherein said cover includes a top cushion divided into sections that are connected by further elastic bands which allow vertical movement of said coil springs and said bellows.
Claim 13
Dependent Claim
76 words
A fluid containing mattress comprising: (a) exterior support means including side frames and a bottom support; (b) flexible and contractible bellows distributed over said bottom support and connected thereto; (c) tubing connecting said bellows to adjacent bellows to permit fluid flow between said bellows; (d) a selected amount of fluid in said bellows; (e) top cover means extending over said bellows and coil springs mounted on top of said bellows and supporting said top cover means.
Claim 14
Dependent Claim
76 words
A fluid containing mattress comprising: (a) exterior support means including side frames and a bottom support; (b) flexible and contractible bellows distributed over said bottom support and connected thereto; (c) tubing connecting said bellows to adjacent bellows to permit fluid flow between said bellows; (d) a selected amount of fluid in said bellows; (e) top cover means extending over said bellows and coil springs mounted on top of said bellows and supporting said top cover means.
Claim 15
Dependent Claim
19 words
A fluid containing mattress according to claim 12 including elastomeric members connecting each coil spring to adjacent coil springs.
Claim 16
Dependent Claim
37 words
A fluid containing mattress according to claim 12 wherein said top cover means includes a top cushion divided into sections that are connected by elastic bands which allow vertical movement of said coil springs and said bellows.
Claim 17
Dependent Claim
41 words
A fluid containing mattress according to claim 12 wherein said bottom support comprises rows of similar plates connected together by interlocking edges thereof, each plate having integral connecting means to attach the bottom end of a respective bellows to the plate.
Claim 18
Dependent Claim
32 words
A fluid containing mattress according to claim 12 wherein said bottom support has an upper surface with rows of threaded connectors provided thereon for the fixing of bottom ends of said bellows.
Claim 19
Dependent Claim
25 words
A fluid containing mattress according to claim 12 wherein said side frames include similar upper and lower generally rectangular frames connected together by resilient springs.
Claim 20
Dependent Claim
113 words
A fluid containing mattress comprising: (a) exterior frame means extending along side edges of said mattress; (b) a bottom support connected to said frame means and extending substantially the length and width of the mattress; (c) rows of contractible bellows having their bottom ends fixed to said bottom support; (d) tubing for connecting each bellows to its adjacent bellows for fluid flow therebetween; (e) a fluid sealingly contained in said bellows and tubing; (f) coil springs mounted on top of said bellows and connected thereto; (g) stretchible elastic means for connecting each coil spring to its adjacent coil springs; and (h) top cover means, including a cushion layer, extending over said coil springs.
Claim 21
Dependent Claim
113 words
A fluid containing mattress comprising: (a) exterior frame means extending along side edges of said mattress; (b) a bottom support connected to said frame means and extending substantially the length and width of the mattress; (c) rows of contractible bellows having their bottom ends fixed to said bottom support; (d) tubing for connecting each bellows to its adjacent bellows for fluid flow therebetween; (e) a fluid sealingly contained in said bellows and tubing; (f) coil springs mounted on top of said bellows and connected thereto; (g) stretchible elastic means for connecting each coil spring to its adjacent coil springs; and (h) top cover means, including a cushion layer, extending over said coil springs.
Claim 22
Dependent Claim
15 words
A fluid containing mattress according to claim 18 wherein said fluid is a harmless liquid.
References Cited (Backward Citations)
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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) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |