US4575886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiberous wave-dampening apparatus
Assignee: Individual
•
Filing: 1982-01-18
•
Granted: 1986-03-18
•
Expires: 2002-01-18
Abstract
Abstract An apparatus for dampening wave action in a waterbed is disclosed. The apparatus consists of a fibrous member bonded to a flexible foam member which is positioned inside a waterbed bladder. The coaction of the fiber and foam dampens waves generated in the water and also provides improved shape-retaining characterisitcs in the apparatus. The use of a large fibrous component allows water to be quickly evacuated from the apparatus and the use of a foam component provides flotation and spacial orientation of the apparatus within the waterbed bladder. A method for bonding the foam to the fibrous member is also disclosed.
Inventors
- 👤 Lynn D. Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:04
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/08; A47C27/085; Y; Y10; Y10S; Y10S5/00; Y10S5/91; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249981
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
128 words
In combination with a waterbed mattress bladder, a wave-dampening apparatus, comprising a flexible fibrous member positioned within and filling a substantial portion of the waterbed mattress bladder, said fibrous member having an upper surface and a lower surface and a foam member comprising a flexible sheet of a buoyant foam material, said foam member being operably attached to said upper surface of said fibrous member by foam penetration of said fibrous member by said foam member, said foam member substantially covering the upper surface of said fibrous member, the horizontal dimensions of said wave-dampening apparatus being similar to but less than the horizontal dimensions of the mattress bladder whereby the buoyancy of said foam member tends to maintain the orientation of said dampening apparatus relative to said bladder.
Claim 2
Dependent Claim
128 words
In combination with a waterbed mattress bladder, a wave-dampening apparatus, comprising a flexible fibrous member positioned within and filling a substantial portion of the waterbed mattress bladder, said fibrous member having an upper surface and a lower surface and a foam member comprising a flexible sheet of a buoyant foam material, said foam member being operably attached to said upper surface of said fibrous member by foam penetration of said fibrous member by said foam member, said foam member substantially covering the upper surface of said fibrous member, the horizontal dimensions of said wave-dampening apparatus being similar to but less than the horizontal dimensions of the mattress bladder whereby the buoyancy of said foam member tends to maintain the orientation of said dampening apparatus relative to said bladder.
Claim 3
Dependent Claim
28 words
The combination of claim 1 wherein the upper surface of said wave-dampening apparatus is substantially a mirror image of the upper interior surface of the waterbed mattress bladder.
Claim 4
Dependent Claim
14 words
The combination of claim 1 wherein said wave-dampening apparatus has a substantially parallelopiped shape.
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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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |