US4707872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient supporting device
Assignee: Individual
•
Filing: 1985-07-16
•
Granted: 1987-11-24
•
Expires: 2005-07-16
Abstract
Abstract A body supporting device comprising a plurality of liquid-filled compartments, each compartment communicating with at least one further compartment through liquid flow-inhibited flow passages, said compartments being filled with a liquid having a viscosity which is higher than that of water.
Inventors
- 👤 Lasse Hessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:10
CPC Classifications
A; A47; A47C; A47C4/00; A47C4/54; A47C27/00; A47C27/08; A47C27/085; Y; Y10; Y10S; Y10S5/00; Y10S5/909
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A resilient supporting device comprising a plurality of liquid-filled compartments having flexible walls, each of said compartments communicating with at least two other of said compartments via flow inhibiting passages, and each of said compartments being filled with a liquid having a viscosity higher than that of water, each of said passages having a cross-sectional area substantially less than that of each of said compartments and comprising two interconnected oppositely directed spiral paths such that, when liquid flows from one compartment to an adjacent compartment, flow direction of the liquid is turned about 180° when liquid flows from one spiral path into another, whereby said passages and said high viscosity liquid effect a substantial resistance against the flow of said liquid from loaded to non-loaded or slightly loaded ones of said compartments.
Claim 2
Dependent Claim
132 words
A resilient supporting device comprising a plurality of liquid-filled compartments having flexible walls, each of said compartments communicating with at least two other of said compartments via flow inhibiting passages, and each of said compartments being filled with a liquid having a viscosity higher than that of water, each of said passages having a cross-sectional area substantially less than that of each of said compartments and comprising two interconnected oppositely directed spiral paths such that, when liquid flows from one compartment to an adjacent compartment, flow direction of the liquid is turned about 180° when liquid flows from one spiral path into another, whereby said passages and said high viscosity liquid effect a substantial resistance against the flow of said liquid from loaded to non-loaded or slightly loaded ones of said compartments.
Claim 3
Dependent Claim
16 words
The supporting device according to claim 1, wherein said compartments have upper surfaces which are dome-shaped.
Claim 4
Dependent Claim
14 words
The supporting device according to claim 1, wherein said compartments comprise foamed elastomeric material.
Claim 5
Dependent Claim
19 words
The supporting device according to claim 1, wherein the viscosity of said liquid exceeds 10 cp at 20° C.
Claim 6
Dependent Claim
27 words
The supporting device according to claim 1, wherein said liquid is selected from the group consisting of glycerin, ethylene glycol, animal and vegetable oils and mixtures thereof.
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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) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |