US3840920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable mattress for pregnant mothers
Assignee: WHITE DORIS
•
Filing: 1972-01-24
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Granted: 1974-10-15
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Expires: 1992-01-24
Abstract
Abstract A body resting on a mattress is uniformly supported because a layer of substantially non-resilient but flowable material below the top resilient layer of the mattress distributes itself to conform to the general contour of the body. The flowability of the non-resilient material is controlled. The mattress may have the envelope that contains the non-resilient flowable material divided into compartments with means to alter the support given by each compartment, and said means may be programmed so the mattress massages the body.
Inventors
- 👤 W Voelker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:00
CPC Classifications
A; A47; A47C; A47C20/00; A47C20/02; A47C20/025; A47C27/00; A47C27/08; A47C27/086; A47C27/10; A47C27/14; A47C27/148
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
A structure consisting essentially of the combination of: a. a flexible envelope having walls of a sheet material of relatively slight stretchability that are sufficiently free of pores as to retain the contents of the envelope, said envelope comprising at least one compartment b. a flowable substantially non-resilient material having thixotropic properties filling the envelope c. a means for controlling the flowability of the flowable material whereby the flowable material locks in position and does not flow when the desired shape of the flowable material has been obtained d. a sheet of resilient material interposed between the flowable material and the body to be supported by the structure.
Claim 2
Dependent Claim
108 words
A structure consisting essentially of the combination of: a. a flexible envelope having walls of a sheet material of relatively slight stretchability that are sufficiently free of pores as to retain the contents of the envelope, said envelope comprising at least one compartment b. a flowable substantially non-resilient material having thixotropic properties filling the envelope c. a means for controlling the flowability of the flowable material whereby the flowable material locks in position and does not flow when the desired shape of the flowable material has been obtained d. a sheet of resilient material interposed between the flowable material and the body to be supported by the structure.
Claim 3
Dependent Claim
28 words
The structure of claim 1 in which there are a plurality of compartments in each of which separately a predetermined flowability of the flowable material may be established.
Claim 4
Dependent Claim
21 words
The structure of claim 1 in which the flowable material is composed primarily of sphere-like pieces of a substantially non-resilient material.
Claim 5
Dependent Claim
41 words
The structure of claim 1 in which the flowable material is lubricated by the particles of the flowable material having a thin coating oa an elastomer or materials yielding lower coefficient of friction than that of the flowable material on itself.
Claim 6
Dependent Claim
31 words
The structure of claim 1 in which the flowable material is lubricated by a liquid that fills or partially fills the voids between the particles of the flowable substantially non-resilient material.
Claim 7
Dependent Claim
16 words
The structure of claim 1 in which the sheet of resilient material is flexible urethane foam.
Claim 8
Dependent Claim
17 words
The structure of claim 1 in which the sheet of resilient material is inside the flexible envelope.
Claim 9
Dependent Claim
34 words
The structure of claim 1 in which all surfaces of the envelope are covered with resilient flexible material on either the outer surfaces of the envelope or on the inner surfaces of the envelope.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |