Swivel chair
First Claim
1. An office swivel chair comprising a foot with a center column extending upwards therefrom comprising:
- a seat carrier secured at an upper end of said center column,a seat top pivotable around a horizontal axis close to a front edge of said seat top,connected to said seat carrier, and biased by a spring arrangement with an upwards directed force,at least one lever extending in a first direction and having an upwards extending portion,a back rest attached to said at least one lever at said upwards extending portion,a first link element secured to said seat carrier under said seat top, anda second link element secured to an underside of said seat top,at least one of said first link element and said second link element beingdisplaceably mounted in a guide such that said at least one link element is movable toward or away from the other of said link elements in said first direction of said lever,said at least one lever being articulately connected to said seat carrier at said first link element, and spaced therefrom, being articulately connected with said second link element, wherein both link elements comprise swivelling axes parallel to said seat top pivoting top axis, and wherein a length of said at least one lever, between said first link element and said second link element, is variable by displacing at least one of said first link element and said second link element in said first direction of said lever.
1 Assignment
0 Petitions
Accused Products
Abstract
An office swivel chair is provided comprising a foot with a center column extending upwards therefrom, wherein the center column may be variable in length and/or spring mounted, a seat carrier is secured at the upper end of the center column, a seat top pivotable around a horizontal axis close to the front edge of the seat top, is connected with the seat carrier, and is biased by a spring arrangement with an upwards directed force, and a back rest attached at least one upwards extending lever which is articulately connected with the seat carrier at a first link point under the seat top, and spaced therefrom is articulately connected with the underside of the seat top at a second link point wherein, both link points comprise swivelling axes in parallel with the seat top swivelling axis. The length of the lever between the first link point and the second link point is variable by displacing the first link point and/or the second link point in the direction of the lever.
54 Citations
16 Claims
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1. An office swivel chair comprising a foot with a center column extending upwards therefrom comprising:
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a seat carrier secured at an upper end of said center column, a seat top pivotable around a horizontal axis close to a front edge of said seat top, connected to said seat carrier, and biased by a spring arrangement with an upwards directed force, at least one lever extending in a first direction and having an upwards extending portion, a back rest attached to said at least one lever at said upwards extending portion, a first link element secured to said seat carrier under said seat top, and a second link element secured to an underside of said seat top, at least one of said first link element and said second link element being displaceably mounted in a guide such that said at least one link element is movable toward or away from the other of said link elements in said first direction of said lever, said at least one lever being articulately connected to said seat carrier at said first link element, and spaced therefrom, being articulately connected with said second link element, wherein both link elements comprise swivelling axes parallel to said seat top pivoting top axis, and wherein a length of said at least one lever, between said first link element and said second link element, is variable by displacing at least one of said first link element and said second link element in said first direction of said lever. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A swivel chair comprising a foot with a center column extending upwards therefrom comprising:
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a seat carrier attached to said center column, a seat top pivotably attached, close to a front edge of said seat top, to said seat carrier so as to pivot around a horizontal axis, and biased with an upwards directed force against said seat top, rearwardly of said pivot connection, at least one lever extending in a first direction and having an upwards extending portion, a back rest attached to said at least one lever at said upwards extending portion, a first link element attached to said seat carrier under said seat top, and a second link element attached to an underside of said seat top, at least one of said first link element and said link element being displaceably mounted in a guide such that said at least one link element is movable toward or away from the other of said link elements in said first direction of said lever, said at least one lever attached to said seat carrier at said first link element, and spaced therefrom, attached to said second link element, wherein both link elements comprise swivelling axes parallel to said seat top horizontal axis, and wherein a length of said at least one lever, between said first link element and said link element, is variable by displacing at least one of said first link element and said second link element in said first direction of said lever.
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Specification