Chair shell with selective back stiffening
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United States of America Patent
Stats
-
May 17, 1988
Grant Date -
N/A
app pub date -
Apr 10, 1986
filing date -
Apr 10, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A shell construction is provided for seating, such as chairs and the like, and comprises a semi-rigid, resiliently flexible sheet, having a generally L-shaped side elevational configuration. The sheet has a bottom shaped to support a buttock area of an adult user, and a back with a central area disposed directly behind a lumbar area of a seated adult user to support the same. An upper area of the back is disposed generally behind an upper back area of a seated user to selectively support the same. At least one rib is formed integrally on the rearward side of the sheet, and extends generally vertically along the central area of the back to stiffen the central area of the back in a vertical plane for firm support of at least the lumbar area of the seated user, yet permit at least the upper portion of the back to flex in a horizontal plane for improved freedom of movement of the upper back area of the seated user.
First Claim
Family
International Classification(s)
Cited Art Landscape
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