US4558476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation type apparatus and method for supporting a load
Assignee: Individual
•
Filing: 1983-10-11
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Granted: 1985-12-17
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Expires: 2003-10-11
Abstract
Abstract A flotation type apparatus used to support loads is disclosed, as well as a method for supporting a load with a flotation apparatus. The basic configuration of the apparatus is comprised of three major components, namely, a fluid filled envelope, a resilient material within said envelope, and a gas chamber located below the resilient material and within said envelope. One or more loads are placed upon the upper surface of the fluid filled envelope and are supported by a combination of the forces exerted by the liquid, the resilient material and the gas. The pressures of the liquid and gas may both be varied to alter the supportive force experienced at the surface of the apparatus. The gas chamber may be divided into a plurality of chambers, the pressure in each being individually adjustable to vary the supportive forces felt over the surface of the flotation apparatus.
Inventors
- 👤 Philip C. Linder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:46
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/14; A47C27/20; A47C27/08; A47C27/081; A47C27/085; A47C27/088; A47C27/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A flotation apparatus for exerting a supportive force to support one or more loads comprising: means for confining a liquid at adjustable pressure having an upper surface upon which said load or loads may be placed; means for adjusting said pressure of said liquid so that the forces supporting said load may be varied; a resilient material located within said means for confining said liquid for supporting said load in conjunction with said liquid; means for confining a gas at adjustable pressure located within said means for confining said liquid for supporting said load in conjunction with said resilient material and said liquid; means for adjusting the pressure of said gas to further vary said froces supporting said load; and rigid means located between said resilient material and said means for confining a gas for providing rigidity to the means for confining a gas.
Claim 2
Dependent Claim
144 words
A flotation apparatus for exerting a supportive force to support one or more loads comprising: means for confining a liquid at adjustable pressure having an upper surface upon which said load or loads may be placed; means for adjusting said pressure of said liquid so that the forces supporting said load may be varied; a resilient material located within said means for confining said liquid for supporting said load in conjunction with said liquid; means for confining a gas at adjustable pressure located within said means for confining said liquid for supporting said load in conjunction with said resilient material and said liquid; means for adjusting the pressure of said gas to further vary said froces supporting said load; and rigid means located between said resilient material and said means for confining a gas for providing rigidity to the means for confining a gas.
Claim 3
Dependent Claim
36 words
The flotation apparatus of claim 1 further comprising: positioning means for positioning said resilient material within said means for confining said liquid to maintain said resilient material in a predetermined position for adequately supporting the load.
Claim 4
Dependent Claim
58 words
The flotation apparatus of claim 1 wherein said means for confining a gas include means for restricting the flow of said gas from one portion of said means for confining a gas to other portions thereof to restrict the shifting of said gas as said load is placed upon or moved over the surface of said flotation apparatus.
Claim 5
Dependent Claim
22 words
The flotation apparatus of claim 1 wherein said resilient material is liquid absorbent for modifying the supported forces of said resilient material.
Claim 6
Dependent Claim
56 words
The flotation apparatus of claim 1 wherein said means for containing a gas include a plurality of chambers, each of which is connected to said means for adjusting the pressure of said gas for varying the pressure in each chamber independently, and consequently varying the forces supporting said load in different portions of said flotation apparatus.
Claim 7
Dependent Claim
40 words
The flotation apparatus of claim 5 wherein said chambers are configured into at least three chambers each under approximately one third of the upper surface area of the flotation apparatus for varying the supportive forces of said upper surface areas.
Claim 8
Dependent Claim
40 words
The flotation apparatus of claim 5 wherein said chambers are configured into at least six chambers, each under approximately one sixth of the upper surface area of the flotation apparatus for varying the supportive forces of said upper surface areas.
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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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |