Seat, in particular an office chair
First Claim
1. A seat, in particular an office chair, comprising:
- a seat support for a seating surface;
a backrest support supporting a backrest and attached to the seat support, the backrest comprising a backrest shell having a plurality of curved ribs made from a sheet of flexible material, the backrest shell defining at least a right peripheral side, a left peripheral side, and a top peripheral side of the backrest, the backrest shell having a plurality of curved ribs on at least the right and left peripheral sides and, said curved ribs extending to a peripheral side of said backrest support and separated from one another by a plurality of slots incorporated on said peripheral sides, at least some of said ribs curving convexly forward toward the seating surface as viewed from a rear of the seat such that the at least some of the ribs form a concave forward surface of the backrest shell, the backrest comprising a cover fixed to the top peripheral side and free ends of the flexible ribs on the opposite peripheral sides of the backrest shell, the cover forming a secant relative to a surface of the backrest shell along a widthwise cross section of the backrest shell and cover, wherein a force applied on the cover toward the shell causes one or more ribs on at least one of the peripheral sides to move toward the seating surface, and the backrest support comprising at least one backrest support arm which extends vertically from the seat support to a central region of the backrest, the flexible curved ribs extending from the at least one backrest support arm to said peripheral side one of said peripheral sides.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a seat (1), in particular an office chair, comprising a seat support (3) for a seating surface (6) and comprising a backrest support (4) of a backrest (5), which is held on the seat support (3) so as to be able to move in a tiltable manner to the side, wherein the backrest support (4) comprises two support arms (4a, 4b) which are configured to be flexible and/or articulated laterally and spaced apart from one another. Preferably, the seating surface (6) and/or the backrest (5) comprises a curved seat shell and/or backrest shell (6a, 5a) provided with a cover (6b, 5b) with a number of flexible curved ribs (15, 16) on the edge of the shell, wherein the cover is stretched by the seat shell and/or backrest shell (6a, 5a) such that when the cover (6b, 5b) is loaded, the bending of the curved ribs (15, 16) is altered.
62 Citations
20 Claims
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1. A seat, in particular an office chair, comprising:
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a seat support for a seating surface; a backrest support supporting a backrest and attached to the seat support, the backrest comprising a backrest shell having a plurality of curved ribs made from a sheet of flexible material, the backrest shell defining at least a right peripheral side, a left peripheral side, and a top peripheral side of the backrest, the backrest shell having a plurality of curved ribs on at least the right and left peripheral sides and, said curved ribs extending to a peripheral side of said backrest support and separated from one another by a plurality of slots incorporated on said peripheral sides, at least some of said ribs curving convexly forward toward the seating surface as viewed from a rear of the seat such that the at least some of the ribs form a concave forward surface of the backrest shell, the backrest comprising a cover fixed to the top peripheral side and free ends of the flexible ribs on the opposite peripheral sides of the backrest shell, the cover forming a secant relative to a surface of the backrest shell along a widthwise cross section of the backrest shell and cover, wherein a force applied on the cover toward the shell causes one or more ribs on at least one of the peripheral sides to move toward the seating surface, and the backrest support comprising at least one backrest support arm which extends vertically from the seat support to a central region of the backrest, the flexible curved ribs extending from the at least one backrest support arm to said peripheral side one of said peripheral sides. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A seat, in particular an office chair, comprising:
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a seat support for a seating surface; a backrest support coupled with the seat support so as to be able to move relative to the seat support, the backrest support comprising two support arms having upper ends connected by a connecting element, the support arms and connecting element defining a central opening;
a backrest cover; anda sheet of flexible curved shell defining at least a right peripheral side, a left peripheral side, and a top peripheral side and extending at least partially between each of the two support arms and the cover, the flexible curved shell extending convexly as viewed from a rear such that the at least some of the flexible curved shell forms a concave forward surface of the backrest shell toward the seating surface and having a peripheral edge surrounding the shell and including the right, left, and top peripheral sides, wherein the backrest cover is attached to the top peripheral side and to the right and left peripheral sides on opposite lateral sides of the shell, the backrest cover forming a secant relative to the shell on a lateral cross section of the backrest cover and shell to support the backrest cover relative to the shell and the backrest support and wherein a bending of at least a portion of the flexible curved shell is altered at least one of the lateral sides of the shell becomes more concavely curved toward the seating surface when the cover is loaded in a direction toward the flexible curved shell. - View Dependent Claims (10, 11, 12)
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13. A seat, in particular an office chair, comprising:
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a seat support for a seating surface; a backrest support coupled with the seat support so as to be able to move relative to the seat support, the backrest support comprising a pair of vertical support arms defining a central opening; a backrest cover; and a curved shell made of a flexible sheet and disposed between the support arms and the cover, the shell comprising a plurality of ribs extending outwardly from the vertical support arms, a first set of the ribs extending outwardly from a first one of the support arms and a second set of the ribs extending outwardly from a second one of the support arms, the first and second sets of ribs extending in opposing directions, each of said ribs spaced apart from adjacent ribs such that each rib is capable of flexing independently of the other ribs, each of the ribs extending outwardly to a respective opposite one of the first and second peripheral edges of the shell, a third peripheral edge interconnecting the first and second peripheral edges; wherein the backrest cover is attached to each of the first, second, and third peripheral edges of the shell, the backrest cover forming a secant relative to the shell on a lateral cross section of the backrest cover and the shell to support the backrest cover relative to the shell and the backrest support, wherein a first lateral edge of the cover is supported on the first peripheral associated with the first set of ribs and a second lateral edge of the cover is supported on the second peripheral associated with the second set of ribs, and wherein at least one of the ribs becomes more curved toward the seating surface when the cover is loaded in a direction toward the flexible curved shell. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification