EP0131553A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Chair
Assignee: Castelli SpA
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Filing: 1984-07-04
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Granted: —
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Expires: 2004-07-04
Abstract
Abstract A chair with a backrest (3) and seat (4) which are movable in relation to a fixed structure (2), consists of a backrest support (8) hinged to the fixed structure around a first transverse axis (9) perpendicular to the vertical plane of symmetry of the chair, the said axis being situated substantially at the seat level and being displaced forwards in relation to the rear edge of the seat. Stop means are provided to limit the rotation ofthe backrest support (8) relative to the fixed structure (2), the said means defining a forwardly rotated end position forthe backrest support, corresponding to an upright position of the backrest, and a rearwardly rotated end position corresponding to a reclined position of the backrest. The chair is provided with resilient biassing means which bias the backrest support (8) to its forwardly rotated end position. A seat support (10) is hinged, substantially adjacent its front edge around a second transverse axis (11) on the fixed structure (2) parallel to and displaced forwardly relative to the first axis (9) the seat support (10) being also connected to the backrest support (8) in correspondence with the rear edge of the seat.
Inventors
- 👤 Ennio Rizzoli
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 10:05
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/032; A47C1/03261; A47C1/03272; A47C1/03274; A47C1/03277; A47C1/03279
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
222 words
A chair having a fixed structure (2) and a backrest (3) and seat (4) which are movable relative to the said fixed structure, characterised in that the chair includes: - a backrest support (8) articulated to the fixed structure (2) around a first transverse axis (9), perpendicular to the vertical plane of symmetry of the chair, the said axis (9) being situated substantially level with the seat (4) and being displaced forwardly relative to the rear edge of the seat (4), - stop means (24a, 20a, 42, 41) for limiting rotation of the backrest support (8) ' relative to the fixed structure (2) of the chair, the said means defining for the backrest support (8) a forwardly rotated end position corresponding to an upright position of the backrest (3) and a backwardly rotated end position corresponding to a reclined position of the backrest (3), - resilient biassing means (46) which tend to urge the backrest support (8)into its forwardly rotated end position, and - a seat support (10) articulated substantially adjacent its front edge to the fixed structure (2) around a second transverse axis (11) parallel to and displaced forwardly relative to the said first transverse axis (9), the said seat support (10) being moreover connected to the backrest support (8) substantially in correspondence with the rear edge of the seat (4).
Claim 2
Dependent Claim
222 words
A chair having a fixed structure (2) and a backrest (3) and seat (4) which are movable relative to the said fixed structure, characterised in that the chair includes: - a backrest support (8) articulated to the fixed structure (2) around a first transverse axis (9), perpendicular to the vertical plane of symmetry of the chair, the said axis (9) being situated substantially level with the seat (4) and being displaced forwardly relative to the rear edge of the seat (4), - stop means (24a, 20a, 42, 41) for limiting rotation of the backrest support (8) ' relative to the fixed structure (2) of the chair, the said means defining for the backrest support (8) a forwardly rotated end position corresponding to an upright position of the backrest (3) and a backwardly rotated end position corresponding to a reclined position of the backrest (3), - resilient biassing means (46) which tend to urge the backrest support (8)into its forwardly rotated end position, and - a seat support (10) articulated substantially adjacent its front edge to the fixed structure (2) around a second transverse axis (11) parallel to and displaced forwardly relative to the said first transverse axis (9), the said seat support (10) being moreover connected to the backrest support (8) substantially in correspondence with the rear edge of the seat (4).
Claim 3
Dependent Claim
147 words
Chair according to Claim 1, characterised in that the fixed structure (2) of the chair includes a crosspiece (7) and two support bars (6) projecting cantilever-fashion forwardly from the two ends of the crosspiece (7), in that the backrest support includes two substantially L-shaped support arms (8) each connected at one end to a respective side of the backrest (3) and articulated at its opposite end around the said first transverse axis (9) to a respective end of the crosspiece (7), and in that the seat support comprises two lateral support members (10) connected to the two sides of the scat (4), and having their front ends articulated around the said second transverse axis (11) to the two front ends of the said support bars (6) and having their rear ends connected to the said L-shaped support arms (8) rearwardly of the said first transverse axis (9).
Claim 4
Dependent Claim
106 words
Chair according to Claim 2, characterised in that each of the said support bars (6) has a box-like body and that the said resilient biassing means include at least one helical spring (46) disposed within the box-like body of one of the said support bars (6), the said helical spring (46) having one end connected to the front end of the said support bar (6) and the other end connected to one end of a tie-bolt (48) the opposite end of which is connected to a respective backrest support arm (8) in a zone which does not coincide with the said first transverse articulation axis (9).
Claim 5
Dependent Claim
73 words
Chair according to Claim 2, in which each backrest support arm (8) is articulated to the respective end of the crosspiece (7) through the interposition of a pivot pin (13), characterised'in that the said resilient biassing means consist of a spring (58) wound spirally around the said pivot pin (13) and having its two ends (59,60) bearing respectively against the respective backrest support arm (8) and the respective end of the crosspiece (7).
Claim 6
Dependent Claim
100 words
Chair according to Claim 2, characterised in that the said crosspiece (7) has a box-like body and in that the said resilient biassing means consist of at least one helical spring (62) disposed within one end (7a) of the crosspiece (7) and having one end connected to the crosspiece (7) and its opposite end connected to one end of a lever (67) articulated around the said first transverse axis (9) and fixed to a respective backrest support arm (8), the said lever (67) being designed to compress the said helical spring (62) when the backrest support (8) is rotated backwards.
Claim 7
Dependent Claim
78 words
Chair according to Claim 2, in which the fixed structure includes two pairs of lateral legs (5) each consisting of a tubular element, characterised in that the said resilient biassing means consist of a helical spring (68) disposed within one of the lateral legs of the chair, the said helical spring having its lower end connected to an anchoring element (69) located within the leg (5) and its upper end connected to a respective backrest support arm (C).
Claim 8
Dependent Claim
29 words
Chair according to Claim 6, characterised in that means (69 to 72) are provided for adjusting the position of the said anchoring element (69) within the said leg (5).
Claim 9
Dependent Claim
52 words
Chair according to Claim 6, characterised in that the upper end of the said helical spring (68) is hooked to a transverse pin (74) which forms part of the said backrest support arm (8) and which projects into the inside of the said leg (5) through a guide slot (84)in said leg.
Claim 10
Dependent Claim
63 words
Chair according to Claim 2, characterised in that the said crosspiece (7) has a box-like body and that the said resilient biassing means consist of a torsion bar (84) disposed along the crosspiece (7) and anchored at the centre to the central zone of the crosspiece (7), the ends of the torsion bar (84) being connected to the two backrest support arms (8).
Claim 11
Dependent Claim
49 words
Seat according to Claim 9, characterised in that the crosspiece (7) is provided with means (87) for anchoring the centre portion (85) of the torsion bar (84), the said anchoring means (87) being adjustable in position in order to allow adjustment of the loading of the torsion bar (84).
Claim 12
Dependent Claim
64 words
Chair according to Claim 2, characterised in that each end of the crosspiece (7) and the corresponding ding backrest support arm (8) has two contraposed surfaces (97, 98) and in that the said resilient means biassing the backrest towards its upright position consist of at least one substantially C-shaped leaf spring (96) the ends of which bear against the said contraposed surfaces (97, 98).
References Cited (Backward Citations)
No citation records indexed.
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