Patent US4424600A successfully refreshed from Google Patents.
US4424600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable firmness mattress pillow top
Assignee: Dreamwell Ltd
•
Filing: 1981-06-22
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Granted: 1984-01-10
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Expires: 2001-06-22
Abstract
Abstract A mattress construction in which the firmness of the top surface is selectively adjustable. A mattress body provides the primary support for a person lying on top thereof. A removable pillow top covers the mattress body, and is removably fastened thereto along its peripheral edges. A relatively thin fluid inflatable cushion is positioned beneath the removable top such that the pressure in the cushion can be varied to alter the firmness of the mattress top surface.
Inventors
- 👤 Milton A. Callaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:12
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/08; A47C27/081; A47C27/04; A47C27/06; A47C27/061; A47C27/063; A47C27/064; A47C27/14; A47C27/18; A47C31/00; A47C31/10; A47C31/105
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
An adjustable mattress construction, comprising: a. a mattress body designed to provide the primary support for a person lying on top thereof; b. a pillow top removably fastened to said mattress body; said pillow top having a bottom liner detachably fastened thereto and c. a relatively thin, fluid inflatable cushion pressurizable to a variable firmness removably positioned within said pillow top to permit adjustment of the firmness of said pillow top said inflatable cushion being arranged between the lower surface of said pillow top and said bottom liner, said pillow top and inflatable cushion substantially covering the top of the mattress body.
Claim 2
Dependent Claim
102 words
An adjustable mattress construction, comprising: a. a mattress body designed to provide the primary support for a person lying on top thereof; b. a pillow top removably fastened to said mattress body; said pillow top having a bottom liner detachably fastened thereto and c. a relatively thin, fluid inflatable cushion pressurizable to a variable firmness removably positioned within said pillow top to permit adjustment of the firmness of said pillow top said inflatable cushion being arranged between the lower surface of said pillow top and said bottom liner, said pillow top and inflatable cushion substantially covering the top of the mattress body.
Claim 3
Dependent Claim
31 words
An adjustable mattress construction as claimed in claim 1, said pillow top being removably fastened to said mattress body by a fastener extending around the peripheral edge of said mattress body.
Claim 4
Dependent Claim
22 words
An adjustable mattress construction as claimed in claim 1, further including a layer of high density foam positioned beneath said inflatable cushion.
Claim 5
Dependent Claim
21 words
An adjustable mattress construction as claimed in claim 1 or 2 or 3, said pillow top comprising a quilted mattress top.
Claim 6
Dependent Claim
42 words
An adjustable mattress construction as claimed in claim 1 or 2 or 3, said inflatable cushion comprising two separately inflatable chambers, one for each half side of the mattress, such that the firmness of each half of the mattress is separately adjustable.
Claim 7
Dependent Claim
51 words
An adjustable mattress construction as claimed in claim 1 or 2 or 3, said mattress body including two separable components, an outer peripheral section, and at least one central core unit, whereby different core units can be placed in said outer peripheral section to provide a desired type of mattress construction.
Claim 8
Dependent Claim
16 words
A mattress construction as claimed in claim 6, said mattress peripheral section comprising pocketed coil springs.
Claim 9
Dependent Claim
16 words
A mattress construction as claimed in claim 7, said pocketed coil springs comprising non-nested coil springs.
Claim 10
Dependent Claim
24 words
A mattress construction as claimed in claim 7, said pocketed coil springs being interconnected through ultrasonic welding of the material housing said coil springs.
Claim 11
Dependent Claim
17 words
A mattress construction as claimed in claim 7, said coil springs being formed of a metallic material.
Claim 12
Dependent Claim
17 words
A mattress construction as claimed in claim 7, said coil springs being formed of a plastic material.
Claim 13
Dependent Claim
27 words
A mattress construction as claimed in claim 1, wherein said inflatable cushion comprises a pneumatically-inflatable pad having a thickness of about one and one-half inches after inflation.
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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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |