US4856845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Armchair with supple backrest
Assignee: Pour La Transformation Des Matieres Plastiques Stamp Ste
•
Filing: 1988-08-03
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Granted: 1989-08-15
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Expires: 2008-08-03
Abstract
Abstract An armchair whose arms and backrest are joined by an elastic element, while the backrest extends well above the arms so that the pressure generated by the user leaning back against the backrest causes it to bend or deflect, thus improving comfort.
Inventors
- 👤 Henry Massonnet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:29
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/44; A47C5/00; A47C5/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
178 words
In an armchair having legs, a seat, a pair of armrests extending generally upwardly from either side of the seat and a backrest which extends upwardly from the seat intermediate the armrests, wherein the legs, seat, armrest and backrest are integrally molded of a semi-rigid plastic material, the improvement comprising the backrest having a thickness so as to permit the backrest to deflect relative to the seat when pressure is applied thereto, the armrests including a main portion which is spaced relationship with respect to the backrest, said main portion of each armrest having an upper surface, each of said armrests having a generally arcuate connecting element extending from adjacent said upper surface of said main portion and integrally connecting said armrest with the backrest at a point spaced above the seat so as to define an opening between each armrest and the backrest which opening extends toward the seat, each of said connecting elements being yieldable so as to permit a limited deflection of the backrest relative to the seat when pressure is applied against the backrest.
Claim 2
Dependent Claim
178 words
In an armchair having legs, a seat, a pair of armrests extending generally upwardly from either side of the seat and a backrest which extends upwardly from the seat intermediate the armrests, wherein the legs, seat, armrest and backrest are integrally molded of a semi-rigid plastic material, the improvement comprising the backrest having a thickness so as to permit the backrest to deflect relative to the seat when pressure is applied thereto, the armrests including a main portion which is spaced relationship with respect to the backrest, said main portion of each armrest having an upper surface, each of said armrests having a generally arcuate connecting element extending from adjacent said upper surface of said main portion and integrally connecting said armrest with the backrest at a point spaced above the seat so as to define an opening between each armrest and the backrest which opening extends toward the seat, each of said connecting elements being yieldable so as to permit a limited deflection of the backrest relative to the seat when pressure is applied against the backrest.
Claim 3
Dependent Claim
41 words
The armchair of claim 1 in which said upper surface of each armrest includes an outwardly extending flange having a first width dimension, each of said connecting elements having a width dimension which is substantially less than said first width dimension.
Claim 4
Dependent Claim
44 words
The armchair of claim 1 in which the backrest includes an upper portion which extends upwardly relative to the armrest and said connecting elements a distance which is substantially equal to twice the distance between said upper surface of said armrest and the seat.
Claim 5
Dependent Claim
26 words
The armchair of claim 3 including openings in said upper portion of said backrest, said openings providing increased flexibility in said upper portion of the backrest.
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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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |