US4032190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ergonomically designed chair
Assignee: Fehlbaum and Co
•
Filing: 1976-06-07
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Granted: 1977-06-28
•
Expires: 1996-06-07
Abstract
Abstract The chair has a back rest provided with stiffening means which impart to the back rest a substantially stiff form up to about the level of the sixth lumbar vertebra of the chair occupant, thus ensuring a continuous transition from the chair seat to the back rest, but allow the back rest an increasingly greater flexibility from said level upwards with the result that the upper part of the back rest bends backwards when the occupant leans back, further characterized in that the upper end of the back rest is joined to the shoulder rest via a bracing corrugation in order to ensure that the chair profile in the region of the occupant's shoulder is a smooth curve matching that of the occupant's spine.
Inventors
- 👤 Wolfgang Muller-Deisig
- 👤 Egon Brauning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:27
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/46; A47C3/00; A47C3/12; A47C5/00; A47C5/12; Y; Y10; Y10S; Y10S297/00; Y10S297/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
205 words
An ergonomically designed chair comprising a rigidly mounted seat, a back rest integrally joined to the seat and a shoulder rest integrally joined to the upper end of the back rest, the profile of the central region of the back rest substantially matching the curve of the human spine, wherein the back rest is joined to the seat by means of a portion of the back rest which fits into a region at the rear center of the seat and at least said portion of the back rest is provided with stiffening means which impart to the back rest a substantially stiff form up to about the level of the sixth lumbar vertebra of the chair occupant, thus ensuring a continuous transition from the chair seat to the back rest, but allow the back rest an increasingly greater flexibility from said level upwards with the result that the upper part of the back rest bends backwards when the occupant leans back, and wherein the upper end of the back rest is joined to the shoulder rest via a bracing corrugation in order to ensure that the chair profile in the region of the occupant's shoulders is a smooth curve matching that of the occupant's spine.
Claim 2
Dependent Claim
205 words
An ergonomically designed chair comprising a rigidly mounted seat, a back rest integrally joined to the seat and a shoulder rest integrally joined to the upper end of the back rest, the profile of the central region of the back rest substantially matching the curve of the human spine, wherein the back rest is joined to the seat by means of a portion of the back rest which fits into a region at the rear center of the seat and at least said portion of the back rest is provided with stiffening means which impart to the back rest a substantially stiff form up to about the level of the sixth lumbar vertebra of the chair occupant, thus ensuring a continuous transition from the chair seat to the back rest, but allow the back rest an increasingly greater flexibility from said level upwards with the result that the upper part of the back rest bends backwards when the occupant leans back, and wherein the upper end of the back rest is joined to the shoulder rest via a bracing corrugation in order to ensure that the chair profile in the region of the occupant's shoulders is a smooth curve matching that of the occupant's spine.
Claim 3
Dependent Claim
36 words
The chair of claim 1, wherein the lower end of the back rest fits into a gap in the rear section of the chair seat and is joined to the chair seat by another bracing corrugation.
Claim 4
Dependent Claim
60 words
The chair of claim 1, wherein the shoulder rest includes lateral wings which extend downwards from the level of the join between the back rest and the shoulder rest, are each separated from the back rest by a gap and can pivot together with the upper part of the shoulder rest about said bracing corrugation which acts as a hinge.
Claim 5
Dependent Claim
21 words
The chair of claim 1, wherein the chair seat, the back rest and the shoulder rest are molded in one piece.
Claim 6
Dependent Claim
18 words
The chair of claim 2, wherein the gap in the rear section of the chair seat is U-shaped.
Claim 7
Dependent Claim
19 words
The chair of claim 2, wherein the bracing corrugation joining the back rest to the chair seat is U-shaped.
References Cited (Backward Citations)
US2667210A
Cited
US2731078A
Cited
US3133765A
Cited
US3309136A
Cited
US3883176A
Cited
US3866974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |