Back construction for seating unit

Chairs and seats – Bottom or back – Contoured back

Reexamination Certificate

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C297S284400, C297SDIG010

Reexamination Certificate

active

07131700

ABSTRACT:
A back construction includes a back shell having stiff thoracic and pelvic regions connected by a flexible lumbar region in a manner adapted to ergonomically support a seated user. The back shell includes spaced-apart resilient edge strips and leaf springs attached to or embedded into the edge strip. The springs match a curvature of the strips and span the lumbar region, biasing the lumbar region of the back shell forwardly in a manner distributing stress applied to the lumbar region by the seated user.

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