Lumbar support
AssigneeFormway Furniture Limited
InventorIan Colin Footitt
Life of this patent
Estimating the term…
Abstract
A back portion for a chair includes a peripheral frame defining an opening therein. A lumbar support portion is disposed in the opening. The lumbar support portion comprises a substantially rigid panel. Two hinge devices are hingedly mounted on opposite sides of the peripheral frame. The lumbar support portion is mounted on the peripheral frame by the two hinge devices. Each hinge device has a biasing device associated with it to bias the hinge devices forwardly relative to the peripheral frame. A cushion may be mounted atop the lumbar support portion. The cushion has a first substantially planar sheet of resiliently flexible material and a second substantially planar sheet of resiliently flexible material. The first and second sheets are separated by a plurality of spaced webs of resiliently flexible material.
Claims24
A cushion comprising:
- a substantially planar first sheet of resiliently flexible material;
- a substantially planar second sheet of resiliently flexible material;
- and
- a plurality of spaced webs separating the first sheet and the second sheet, wherein the webs comprise a first portion connected to the first sheet and a second portion connected to the second sheet, the first and second portions extending at an angle to each other.
A back portion for a chair, the back portion comprising:
- a peripheral frame with an opening therein and two sides, a top and a bottom, each of the sides of the peripheral frame being resiliently flexible at least at an intermediate region corresponding to the lumbar region of an adult occupant of the chair, with the flexibility in each side being constrained to a longitudinal plane and moreover the sides being of such a construction that the neutral axis of bending is close to the front surface of the peripheral frame;
- and
- a resiliently flexible material attached to the frame and drawn taut across the opening.
Dependencies are inferred from the claim text.