EP0198056B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Seat support for chairs, especially for rotating work-chairs
Assignee: Sifa Sitzfabrik GmbH
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Filing: 1985-10-24
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Granted: 1991-01-09
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Expires: 2005-10-24
Abstract
Abstract A seat support for rotating work-chairs comprising the following operating parts: a base element (3) with a support (6) attached at one end, a seat plate fixture (2) and back rest support (4); the seat support has a connecting-piece (7) attached to the operating parts, which is fixed to the back rest support (4) and can be moved on the base element (3) by means of a slide-type guide (10, 11). To lock the movement of the operating parts, a setting means (13) is attached to the connecting-piece (7), which is designed as a lamella package.
Inventors
- 👤 Konrad Neumüller
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 18:02
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/032; A47C1/03294; A47C1/03205; A47C1/0325; A47C1/03255
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
319 words
A seat bracket for chairs, in particular swivel work chairs, consisting of a base body (3; 20) having a support (6; 23) fastened at the end side for the force-locking connection to a central supporting leg (15) of the seat bracket a seat-plate fastening (2; 19) and a back-rest bracket (4; 21), as well as adjusting means for releasing predetermined functions of the seat bracket and its parts, in which respect the back-rest bracket (4; 21) is U-shaped and is conducted with its lower end region as far as approximately centrally underneath the seat-plate and has a transverse pin (8; 26) which hingedly connects the seat-plate fastening (2; 19), which is likewise U-shaped, at its rear end to the back-rest bracket (4; 21), whilst the front end of the seat-plate fastening (3; 14) is connected hingedly to the U-shaped base body (3; 20) by a further transverse pin (5; 22), in which respect the base body (3; 20) extends downwards at an acute angle to the seat-plate fastening (2; 19) and in which respect the base body (3; 20) carries a lower transverse pin (11; 25) which is movable in a slotted guide (10; 30, 31) of at least one connection member (7; 28, 29) which is connected to the back-rest bracket (4; 21) and in which respect a thrust means arranged coaxially to the lower transverse pin (11; 24) of the base body (3; 20) is provided for the force-locking connection of the connection member (7; 28, 29) to the base body (3; 20), characterised in that the back-rest bracket (4) has a further transverse pin (9,27) which is arranged underneath and set-back with regard to the first transverse pin (8, 26) and in that a spring (17, 32) is situated between the base body (3, 20) and the seat-plate fastening, in which respect the spring force forces the base body (3, 20) and the seat-plate fastening apart.
Claim 2
Dependent Claim
319 words
A seat bracket for chairs, in particular swivel work chairs, consisting of a base body (3; 20) having a support (6; 23) fastened at the end side for the force-locking connection to a central supporting leg (15) of the seat bracket a seat-plate fastening (2; 19) and a back-rest bracket (4; 21), as well as adjusting means for releasing predetermined functions of the seat bracket and its parts, in which respect the back-rest bracket (4; 21) is U-shaped and is conducted with its lower end region as far as approximately centrally underneath the seat-plate and has a transverse pin (8; 26) which hingedly connects the seat-plate fastening (2; 19), which is likewise U-shaped, at its rear end to the back-rest bracket (4; 21), whilst the front end of the seat-plate fastening (3; 14) is connected hingedly to the U-shaped base body (3; 20) by a further transverse pin (5; 22), in which respect the base body (3; 20) extends downwards at an acute angle to the seat-plate fastening (2; 19) and in which respect the base body (3; 20) carries a lower transverse pin (11; 25) which is movable in a slotted guide (10; 30, 31) of at least one connection member (7; 28, 29) which is connected to the back-rest bracket (4; 21) and in which respect a thrust means arranged coaxially to the lower transverse pin (11; 24) of the base body (3; 20) is provided for the force-locking connection of the connection member (7; 28, 29) to the base body (3; 20), characterised in that the back-rest bracket (4) has a further transverse pin (9,27) which is arranged underneath and set-back with regard to the first transverse pin (8, 26) and in that a spring (17, 32) is situated between the base body (3, 20) and the seat-plate fastening, in which respect the spring force forces the base body (3, 20) and the seat-plate fastening apart.
Claim 3
Dependent Claim
26 words
A seat bracket for chairs according to claim 1, characterised in that the connection member (12) is designed in one piece with the back-rest bracket (4,18).
Claim 4
Dependent Claim
74 words
A seat bracket for chairs according to claim 1, characterised in that the connection member (7) is designed as at least one lamella set and in which respect the lamellae are connected to the first transverse pin (8) of the back-rest bracket (4), to the second transverse pin (9) of the back-rest bracket (4) and have the slotted guide (10) for the reception of the lower transverse pin (11) of the base body (3).
Claim 5
Dependent Claim
46 words
A seat bracket for chairs according to one of claims 1 to 3, characterised in that the thrust means between the seat-plate fastening (2) and the back-rest bracket (4) is a further spring (16) which forces the seat-plate fastening (2) and the back-rest bracket (4) apart.
Claim 6
Dependent Claim
21 words
A seat bracket for chairs according to claims 1 to 4, characterised in that the springs (16, 17) are leg springs.
Claim 7
Dependent Claim
86 words
A seat bracket according to claim 1, characterised in that the U-shaped back-rest bracket (21) is fastened by its upper end region hingedly to the seat-plate fastening (19) and is fastened by its lower end region hingedly to the U-shaped base body (20) and in the same way as the seat-plate fastening (19) has a transverse pin (26, 27) to which lamellae (28,20) are hinged with the slotted guides (30, 31) which are displaceable about a common third transverse pin (25) in the base body (20).
Claim 8
Dependent Claim
43 words
A seat bracket according to claim 6, characterised in that the lamellae (28, 29) are strip- shaped in design, are alternately stacked and can be pushed over one another in relative movement with their slotted guide (30, 31) about the transverse pin (25).
Claim 9
Dependent Claim
58 words
A seat bracket according to claims 6 and 7, characterised in that the transverse pin (25) simultaneously receives the thrust means (35) for the force-locking connection of the lamellae (28, 29) to one another and to the base body against the force of a spiral spring (32) inserted between the base body (20) and the seat-plate fastening (19).
Claim 10
Dependent Claim
100 words
A seat bracket according to claims 6 to 8, characterised in that the transverse pin (25) is designed as a sleeve through which a rod (36) is conducted, which at its one end receives a threaded nut (37) and between the threaded nut (36) and the outwardly-lying lamella (28) receives a clamping sleeve (38), whilst the opposite end is bent over through 180° and for the protection against torsion of the rod (36) is introduced into a bore (39) on the base body (20) and in turn carries a clamping sleeve (40) between the external lamellae (28) and the 180°-arc.
Claim 11
Dependent Claim
36 words
A seat bracket according to the aforementioned claims 6 to 9, characterised in that a shaped part which serves for locking a lever (41) serving for the height adjustment is placed about the transverse pin (25).
References Cited (Backward Citations)
No citation records indexed.
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