EP0394784A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Friction device for adjusting the inclination of a seat, in particular an office chair
Assignee: Lineager SRL
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Filing: 1990-04-13
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Granted: —
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Expires: 2010-04-13
Abstract
Abstract The device for adjusting the inclination of a seat, in particular an office chair (1), and of its possibly associated backrest (6), is of the type comprising a box casing (4, 40) rigid with the frame (3) and within which there are pivoted sectors (13, 13′, 130) possibly associated with a linkage (15, 16) providing connection to box-shaped blocks (8, 9, 80, 90) containing a seating (10, 100) for the chair column (2) and for the shaft (5) which supports the backrest (6), and is characterised by comprising a friction clutch associated with said box casing (4, 40) and with said sectors (13, 13′, 130), and means for engaging and disengaging said friction clutch.
Inventors
- 👤 Achille Baruffaldi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 10:01
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/022; A47C1/024; A47C1/027; A47C1/031; A47C1/032; A47C1/03205; A47C1/0325
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A device for adjusting the inclination of a seat, in particular an office chair (1), and of its possibly associated backrest (6), of the type comprising a box casing (4, 40) rigid with the frame (3) and within which there are pivoted sectors (13, 13′, 130) possibly associated with a linkage (15, 16) providing connection to box-shaped blocks (8, 9, 80, 90) containing a seating (10, 100) for the chair column (2) and for the shaft (5) which supports the backrest (6), characterised by comprising a friction clutch associated with said box casing (4, 40) and with said sectors (13, 13′, 130), and means for engaging and disengaging said friction clutch.
Claim 2
Independent Claim
111 words
A device for adjusting the inclination of a seat, in particular an office chair (1), and of its possibly associated backrest (6), of the type comprising a box casing (4, 40) rigid with the frame (3) and within which there are pivoted sectors (13, 13′, 130) possibly associated with a linkage (15, 16) providing connection to box-shaped blocks (8, 9, 80, 90) containing a seating (10, 100) for the chair column (2) and for the shaft (5) which supports the backrest (6), characterised by comprising a friction clutch associated with said box casing (4, 40) and with said sectors (13, 13′, 130), and means for engaging and disengaging said friction clutch.
Claim 3
Dependent Claim
39 words
A device as claimed in claim 1, characterised in that said friction clutch consists of a plurality of plates (21) which face each other to form a pack, disc means (24) constituting friction means being interposed between said plates.
Claim 4
Dependent Claim
51 words
A device as claimed in claim 3, characterised in that said plate pack is interposed between said sectors (13, 13′) and is kept in position at one end by being traversed by a pin (19), with discs (24) of material having a high coefficient of friction being interposed between adjacent plates.
Claim 5
Independent Claim
29 words
A device as claimed in one or more of the preceding claims, characterised in that said sectors (13, 13′) each comprise a slot (18) traversed by said pin (19).
Claim 6
Independent Claim
59 words
A device as claimed in one or more of the preceding claims, characterised in that said pin (19) comprises means (25-28) for limiting its axial movement, one end (19′) of said pin emerging from one of said walls (7) of said box casing (4) and abuttingly cooperating with said means (31, 42) for engaging and disengaging said clutch (20).
Claim 7
Independent Claim
74 words
A device as claimed in claims 1 and 5, characterised in that said means for engaging and disengaging the clutch (20) consist of a pair of blocks (32, 35), one of which is fixed and the other is free to rotate by the action of a control rod (36), said blocks cooperating face-to-face via inclined planes, the mobile block acting on the end of said pin (19) against the opposing action of springs (30).
Claim 8
Independent Claim
46 words
A device as claimed in claims 1 and 5, characterised in that said means for engaging and disengaging the clutch (20) consist of a cam element which opposes the end of said pin (19) and is rotated by the swivel movement of a control rod (36).
Claim 9
Dependent Claim
41 words
A device as claimed in claim 1, characterised by comprising a friction clutch (210-300) associated with said box casing (40), said sectors (130) each comprising an arched slot (160) for the passage of means (210, 270) forming part of said clutch.
Claim 10
Dependent Claim
41 words
A device as claimed in claim 8, characterised in that said sectors (130) are pivoted on a common pin (140) provided in said box-shaped block (80), said sectors being spaced apart by the insertion of spacers (150) along said pin (140).
Claim 11
Independent Claim
67 words
A device as claimed in claims 8 and 9, characterised in that in positions substantially distant from said pins (140), said sectors (130) each comprise an arched slot (160) and, in proximity to said slot, a through hole for a pin (170) connecting said sectors to one end of bars (180), the other ends of which are pivoted to said box-shaped block (90) by a pin (190).
Claim 12
Independent Claim
82 words
A device as claimed in claims 8 to 10, characterised in that through said arched slots (160) there passes a pin (210) provided at one end with a head (220) and at its opposite end with a thread (230) to engage a female thread of a control rod (250), bushes (280, 290) of high coefficient of friction being interposed along said pin (210) between said sectors (130), and between said sectors and the lateral walls (70, 70′) of said box casing (40).
Claim 13
Independent Claim
39 words
A device as claimed in claims 8 to 11, characterised in that said sectors (130) are associated with said bars (180′), these latter being provided with an end comprising an elongate slot (310) through which said pin (210) passes.
References Cited (Backward Citations)
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