US4331361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Posture chair back
Assignee: KAY SPRINGS INCORPORATED SYOSSET NY A CORP OF
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Filing: 1980-05-22
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Granted: 1982-05-25
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Expires: 2000-05-22
Abstract
Abstract A chair having a seat and a seat back with said seat back having spaced-apart upright members to accommodate the back of a chair occupant in which spaced springy support means are provided in selected regions against which the chair occupant contacts to urge the rib cage and chest outwardly and urge the lumbar vertebral arch rearward, to induce minimal stress in the seated spine by reducing its curvatures.
Inventors
- 👤 Daniel Krakauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:18
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/46
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
114 words
A chair having a seat positioned a suitable seating distance above floor level and a seat back associated with said seat to accommodate the back of a chair occupant, said seat back having a first back supporting means spaced vertically from said seat having a substantially horizontal thoraco-lumbar-joint-engaging projecting surface, and a second back supporting means spaced vertically above said first back-supporting means and protruding convexly forwardly in the horizontal plane above said seat beyond said thoraco-lumbar-joint-engaging projecting surface in its uncompressed state, to urge the thoracic spine forwardly whereby to bring the full spine in a seated position into minimal curvature and induce low stress posture in the spine of the chair occupant.
Claim 2
Dependent Claim
114 words
A chair having a seat positioned a suitable seating distance above floor level and a seat back associated with said seat to accommodate the back of a chair occupant, said seat back having a first back supporting means spaced vertically from said seat having a substantially horizontal thoraco-lumbar-joint-engaging projecting surface, and a second back supporting means spaced vertically above said first back-supporting means and protruding convexly forwardly in the horizontal plane above said seat beyond said thoraco-lumbar-joint-engaging projecting surface in its uncompressed state, to urge the thoracic spine forwardly whereby to bring the full spine in a seated position into minimal curvature and induce low stress posture in the spine of the chair occupant.
Claim 3
Dependent Claim
22 words
A chair as claimed in claim 1, said seat back having an opening between said seat and said first back supporting means.
Claim 4
Dependent Claim
42 words
A chair as claimed in claim 1, said seat back having an opening between said seat and said first back supporting means, and a covering means over said opening opposite from said first back supporting means and at a lower level therefrom.
Claim 5
Dependent Claim
31 words
A chair as claimed in claim 1, said first back supporting means having a relatively firm surface above said seat, and said second back supporting means having a substantially springy support.
Claim 6
Dependent Claim
30 words
A chair as claimed in claim 1, said first back support means having a substantially flat relatively firm support, and said second back supporting means having a springy convex support.
Claim 7
Dependent Claim
28 words
A chair as claimed in claim 1, said first back supporting means having an arced sinuous spring, and said second back supporting means having an arced sinuous spring.
Claim 8
Dependent Claim
42 words
A chair as claimed in claim 1, said first back supporting means having an arced sinuous spring projecting concavely relative to said seat back, and said second back supporting means having an arced sinuous spring projecting convexly relative to said seat back.
Claim 9
Dependent Claim
18 words
A chair as claimed in claim 7, said first and second back supporting means having covering said springs.
Claim 10
Dependent Claim
63 words
A chair as claimed in claim 1, said seat having a nonsupportive area between said seat and said first back supporting means, said first and second back supporting means having arced sinuous springs with the sinuous springs in said first back supporting means being concave relative to said seat back, and said second back supporting means being concave relative to said seat back.
Claim 11
Dependent Claim
93 words
A chair as claimed in claim 1, said first back supporting means being concave forwardly relative to said seat back and including a plurality of arced sinuous springs, and said second back supporting means projecting forwardly relative to said seat back a greater distance than said first back supporting means and having a plurality of arced sinuous springs projecting convexly over said seat and extending forward of said seat back a distance greater than said first back supporting means, and being sufficiently resilient to depress under load backwardly relative to said first means.
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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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |