US4467485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterbed mattress with free floating baffle
Assignee: LAND & SKY
•
Filing: 1981-04-03
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Granted: 1984-08-28
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Expires: 2001-04-03
Abstract
Abstract A waterbed mattress has an internal horizontally-extending baffle for reducing wave-like motion of the water in the mattress. The baffle comprises at least two horizontally-extending layers secured together, a first layer denser than water and a second layer less dense than water. The first layer can be a porous mass of bound-together fibers and the second layer can be closed cell polymeric foam. The baffle, which floats spaced apart from the bottom wall of the mattress, is foldable and collapsible, so that the entire mattress can be folded for storage.
Inventors
- 👤 Charles P. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:10
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/08; A47C27/088; A47C27/085
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A foldable waterbed mattress comprising (a) an enclosing structure comprising a horizontally-extending top surface and a horizontally-extending bottom surface, and (b) a horizontally-extending baffle structure having a horizontal extent corresponding to the horizontal extent of the top surface of the mattress and unattached to the enclosing structure, the baffle structure comprising, a horizontally extending layer denser than water and a horizontally extending homogeneous sheet less dense than water, the sheet being substantially coextensive with the dense layer and having sufficient mass whereby the baffle structure floats spaced apart from the bottom surface when the mattress is filled with water, and wherein the entire waterbed mattress, including the baffle structure, can be folded for storage, the baffle structure permitting water to circulate between the top surface and the bottom surface.
Claim 2
Dependent Claim
129 words
A foldable waterbed mattress comprising (a) an enclosing structure comprising a horizontally-extending top surface and a horizontally-extending bottom surface, and (b) a horizontally-extending baffle structure having a horizontal extent corresponding to the horizontal extent of the top surface of the mattress and unattached to the enclosing structure, the baffle structure comprising, a horizontally extending layer denser than water and a horizontally extending homogeneous sheet less dense than water, the sheet being substantially coextensive with the dense layer and having sufficient mass whereby the baffle structure floats spaced apart from the bottom surface when the mattress is filled with water, and wherein the entire waterbed mattress, including the baffle structure, can be folded for storage, the baffle structure permitting water to circulate between the top surface and the bottom surface.
Claim 3
Dependent Claim
112 words
A foldable waterbed mattress comprising (a) an enclosing structure comprising a horizontally-extending top surface and a horizontally-extending bottom surface, and (b) a horizontally-extending baffle structure having a horizontal extent corresponding to the horizontal extent of the top surface of the mattress and unattached to the enclosing structure, the baffle structure comprising a, horizontally extending layer denser than water and a homogeneous sheet less dense than water, the sheet being substantially coextensive with the dense layer and having sufficient mass whereby the baffle structure floats spaced apart from the bottom surface when the mattress is filled with water, the baffle structure permitting water to circulate between the top surface and the bottom surface.
Claim 4
Dependent Claim
112 words
A foldable waterbed mattress comprising (a) an enclosing structure comprising a horizontally-extending top surface and a horizontally-extending bottom surface, and (b) a horizontally-extending baffle structure having a horizontal extent corresponding to the horizontal extent of the top surface of the mattress and unattached to the enclosing structure, the baffle structure comprising a, horizontally extending layer denser than water and a homogeneous sheet less dense than water, the sheet being substantially coextensive with the dense layer and having sufficient mass whereby the baffle structure floats spaced apart from the bottom surface when the mattress is filled with water, the baffle structure permitting water to circulate between the top surface and the bottom surface.
Claim 5
Dependent Claim
13 words
The mattress of claim 1 or 2 wherein the sheet is substantially continuous.
Claim 6
Dependent Claim
38 words
The mattress of claim 3 wherein the sheet has a horizontal extent corresponding to the horizontal extent of the top surface of the mattress, and is spaced apart from the top surface and bottom surface of the mattress.
Claim 7
Dependent Claim
15 words
The mattress of claim 1 or 2 in which the sheet comprises closed-cell polymeric foam.
References Cited (Backward Citations)
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Cited
US4204289A
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US4201838A
Cited
US4192031A
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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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |