Patent US4844969A successfully refreshed from Google Patents.
US4844969A
Expired / Lapsed
US
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Orthopedic bed structure
Assignee: Individual
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Filing: 1987-05-04
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Granted: 1989-07-04
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Expires: 2007-05-04
Abstract
Abstract A method and apparatus for providing orthopedic sleeping support without utilizing traditional box-spring or spring-in-mattress devices. A specially prepared (by prescription) fabric is stretched between rigid frame support members beyond moduli conventionally employed in the bedmaking industry, but short of the Young's Modulus for the particular composite fibres.
Inventors
- 👤 James L. Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:21
CPC Classifications
D; D04; D04B; D04B21/00; D04B21/14; D04B21/18; D06; D06C; D06C3/00; D06C3/08; D06C7/00; D06C7/02; D10; D10B; D10B2505/00; D10B2505/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/24785
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
124 words
The method of making a fabric designed to be useful in the formation of a bearing surface for an orthopedic support comprising the steps of: warp-knitting a polyurethane fiber with a chemically different synthetic fiber into a fabric. scouring said fabric; and finishing said fabric under conditions of stretch at a temperature sufficient to heat-set said fabric to stabilize the interknitted fibers thereof at a first desired dimension, the deniers of said polyurethane fiber and said chemically different synthetic fiber having been deliberately selected to provide specific fabric modulus and necessary bearing capacity for the prospective bearing capacity for the prospective users projected for the aforesaid bearing surface when said heat-set fabric is subjected to a second stretching and secured to a framing means.
Claim 2
Independent Claim
124 words
The method of making a fabric designed to be useful in the formation of a bearing surface for an orthopedic support comprising the steps of: warp-knitting a polyurethane fiber with a chemically different synthetic fiber into a fabric. scouring said fabric; and finishing said fabric under conditions of stretch at a temperature sufficient to heat-set said fabric to stabilize the interknitted fibers thereof at a first desired dimension, the deniers of said polyurethane fiber and said chemically different synthetic fiber having been deliberately selected to provide specific fabric modulus and necessary bearing capacity for the prospective bearing capacity for the prospective users projected for the aforesaid bearing surface when said heat-set fabric is subjected to a second stretching and secured to a framing means.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein said warp-knitting further comprises threading a thermoplastic yarn in the middle or back guide bar of a warp-knitting machine and any other synthetic yarn in the front or back guide bar of said machine.
Claim 4
Dependent Claim
35 words
The method of claim 1 wherein said fabric is bi-sectionally fabricated and heat-set so as to accommodate the needs of two persons when said fabric is intended to be used to construct a double bed.
Claim 5
Dependent Claim
9 words
The fabric produced by the process of claim 1.
Claim 6
Dependent Claim
9 words
The fabric produced by the process of claim 2.
Claim 7
Dependent Claim
9 words
The fabric produced by the process of claim 3.
Claim 8
Independent Claim
129 words
The method of making an improved orthopedic bearing surface for providing prescriptive support therapy comprising the steps of: warp-knitting a polyurethane fiber with a chemically different synthetic fiber into a fabric, the deniers of said polyurethane fiber and said chemically different synthetic fiber having been deliberately selected to provide specific fabric modulus and necessary bearing capacity for the prospective users projected for said bearing surface; scouring said fabric; and finishing said fabric under conditions of stretch at a temperature sufficient to heat-set said fabric to stabilize the interknitted fibers thereof at a first desired dimension; and subjecting said heat-set fabric to a second stretching to a point just before encounter with the Young's Modulus of the fabric and securing said fabric under second stretching tension to a framing means.
Claim 9
Independent Claim
129 words
The method of making an improved orthopedic bearing surface for providing prescriptive support therapy comprising the steps of: warp-knitting a polyurethane fiber with a chemically different synthetic fiber into a fabric, the deniers of said polyurethane fiber and said chemically different synthetic fiber having been deliberately selected to provide specific fabric modulus and necessary bearing capacity for the prospective users projected for said bearing surface; scouring said fabric; and finishing said fabric under conditions of stretch at a temperature sufficient to heat-set said fabric to stabilize the interknitted fibers thereof at a first desired dimension; and subjecting said heat-set fabric to a second stretching to a point just before encounter with the Young's Modulus of the fabric and securing said fabric under second stretching tension to a framing means.
Claim 10
Dependent Claim
40 words
The method of claim 7 wherein said warp-knitting further comprises threading a thermoplastic yarn in the middle or back guide bar of a warp-knitting machine and any other synthetic yarn in the front or back guide bar of said machine.
Claim 11
Dependent Claim
33 words
The method of claim 7 wherein said fabric is bi-sectionally fabricated and heat-set so as to be able to accommodate the needs of two persons and the support constructed is a double bed.
Claim 12
Dependent Claim
9 words
The support produced by the process of claim 1.
Claim 13
Dependent Claim
9 words
The support produced by the process of claim 1.
Claim 14
Dependent Claim
9 words
The support produced by the process of claim 9.
Claim 15
Dependent Claim
36 words
A support produced by a process encompassed by the terms of claim 7 wherein a plurality of fabrics warp-knitted and processed as defined by claim 7 are secured under second stretching tension to a framing means.
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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |