Patent US4864668A successfully refreshed from Google Patents.
US4864668A
Expired / Lapsed
US
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Portable back support
Assignee: Individual
•
Filing: 1989-03-21
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Granted: 1989-09-12
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Expires: 2009-03-21
Abstract
Abstract A portable back support having a insert enveloped by a sleeve, forming a cushioned rigid portion and a flexible flap. The back support is dimensioned to support the lumbar and much of the thoracic regions of the spine and is narrower than the distance between a user's scapula. The back support is thus considerably easier to transport and less inconspicuous in use than known portable back supports.
Inventors
- 👤 David Crisp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:30
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/42; A47C7/425; A47C7/02; A47C7/021
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A portable back support adapted for use by a sitting user comprising an insert having a substantially rigid backing and a resilient cushion, and a, flexible sleeve having a length substantially greater than the length of the insert, wherein the insert is retained in the sleeve such that a portion of the sleeve extends beyond the insert forming a flexible flap of a sufficient size to permit the user to sit thereon, thereby anchoring the insert in a vertical position behind the user's spinal column, said insert having a length ranging from approximately 9 to 15 inches and width ranging approximately from 2.5 to 5.5 inches.
Claim 2
Dependent Claim
106 words
A portable back support adapted for use by a sitting user comprising an insert having a substantially rigid backing and a resilient cushion, and a, flexible sleeve having a length substantially greater than the length of the insert, wherein the insert is retained in the sleeve such that a portion of the sleeve extends beyond the insert forming a flexible flap of a sufficient size to permit the user to sit thereon, thereby anchoring the insert in a vertical position behind the user's spinal column, said insert having a length ranging from approximately 9 to 15 inches and width ranging approximately from 2.5 to 5.5 inches.
Claim 3
Dependent Claim
23 words
The portable back support defined in claim 1 wherein the rigid backing is composed of plexiglass or wood or other substantially rigid material.
Claim 4
Dependent Claim
21 words
The portable back support defined in claim 2 wherein the rigid backing has a thickness of approximately one-quarter of an inch.
Claim 5
Dependent Claim
19 words
The portable back support defined in claim 1 wherein the resilient cushion is substantially congruent with the rigid backing.
Claim 6
Dependent Claim
21 words
The portable back support defined in claim 4 wherein the resilient cushion is comprised of a resilient foam of medium firmness.
Claim 7
Dependent Claim
18 words
The portable back support defined in claim 1 wherein the sleeve is composed of a substantially non-elastic fabric.
Claim 8
Dependent Claim
18 words
The portable back support defined in claim 1 wherein the length of the insert is approximately 14.5 inches.
Claim 9
Dependent Claim
23 words
The portable back support defined in claim 1 wherein the width of the insert is less than the distance between a user's scapula.
Claim 10
Dependent Claim
18 words
The portable back support define in claim 1 wherein the width of the insert is approximately 4.5 inches.
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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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |