SEATING UNIT WITH ADJUSTABLE LUMBAR DEVICE
First Claim
1. A chair back construction comprising:
- an outer shell;
a lumbar assembly positioned over the outer shell and including a lumbar frame including a transition shell having an upper edge and a lower edge, and a vertically sliding live lumbar device having a plurality of horizontal flexible wires, where the transition shell lower edge is positioned on top of an uppermost horizontal flexible wire of the lumbar device; and
a cushion assembly positioned over the lumbar assembly and attached to the outer shell;
wherein the lumbar device is operably slidably mounted between the outer shell and the cushion assembly, and the transition shell upper edge slides between the outer shell and the upholstery cushion assembly.
3 Assignments
0 Petitions
Accused Products
Abstract
A chair includes a lower back frame, a back construction, including a back support attached to the lower back frame, a cushion assembly attached to the back support, and a vertically adjustable lumbar frame positioned between the back support and the cushion assembly. The lumbar frame includes a transition shell and a vertically sliding lumbar device having a plurality of horizontal flexible wires. A lower edge of the transition shell is positioned on top of an uppermost horizontal flexible wire of the lumbar device. The lumbar device is operably slidably mounted between the outer shell and cushion assembly and the transition shell upper edge slides between the outer shell and the upholstery cushion assembly. Also disclosed is a chair including a Y-shaped lower back frame having two uprights and a cross-piece attached to the back support. The uprights and cross-piece of the lower back frame include an overlap flange and the back support includes a channel-shaped flange having detents. The overlap flange and channel-shaped flange mate to form an overlap joint, including a box beam for added structural support.
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Citations
17 Claims
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1. A chair back construction comprising:
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an outer shell; a lumbar assembly positioned over the outer shell and including a lumbar frame including a transition shell having an upper edge and a lower edge, and a vertically sliding live lumbar device having a plurality of horizontal flexible wires, where the transition shell lower edge is positioned on top of an uppermost horizontal flexible wire of the lumbar device; and a cushion assembly positioned over the lumbar assembly and attached to the outer shell; wherein the lumbar device is operably slidably mounted between the outer shell and the cushion assembly, and the transition shell upper edge slides between the outer shell and the upholstery cushion assembly. - View Dependent Claims (2, 3, 4, 5)
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6. A lumbar device comprising:
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a first, and a second wire retainer, each retainer including a convex front surface having a plurality of wells, an outside surface including oppositional tabs for slidably engaging a wave ridge of a back support to hold the lumbar device in a selected position, and a rear surface shaped to slidably engage a front, surface of the back support; and a plurality of flexible wires positioned in the wells and held in a horizontal position, wherein the wires slightly bend when placed in the wire retainers to provide live lumbar support. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A chair comprising:
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a lower back frame having two uprights and a cross-piece, wherein the uprights and cross-piece each include an overlap flange; a back construction including a back support, attached to the lower back frame, the back support having two sides and a bottom, the sides and bottom each including a channel-shaped flange, wherein the overlap flanges of the uprights and the cross-piece and the channel-shaped flanges of the back support mate to form a U-shaped overlap joint. - View Dependent Claims (15)
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16. A chair comprising:
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a lower back frame having two uprights each including an overlap flange; a back support attached to the lower back frame, the back support having two sides, each including a channel-shaped flange having detents, wherein the overlap flanges of the uprights and the channel-shaped flanges of the back support mate to form a box beam. - View Dependent Claims (17)
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Specification