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US 5,340,197 AGranted
One-piece seat shell
AssigneeFritz Hansen A/S
InventorBurkhard Vogtherr
Life of this patent
Estimating the term…
Abstract
A one-piece seat shell having a backrest and a seat connected by an angled transition section that contains a plurality of slots to permit resilient deflection of the backrest with respect to the seat.
Claims1
A one piece seat shell (10) comprising
- (a) a backrest (12),
- (b) a seat (14),
- (c) a curved transition section (16) smoothly and arcuately interconnecting the backrest (12) and the seat (14),
- (d) two groups of parallel slots (18'), each group extending inwardly from a laterally exterior edge of said transition section (16), the slots (18') in each group
- (i) extending in a transverse direction,
- (ii) being of different lengths,
- (iii) having outer open ends and closed inner ends,
- (iv) the closed inner ends of said two groups of slots (18') defining between them an intermediate transition region (22) of the seat shell (10)
- which transition region (22) is effective to provide a spring action, and
- which transition region (22) diverges from a transverse center line of said transition region (22) both outwardly towards said backrest (12) and outwardly towards said seat (14).
7 more elements
Dependencies are inferred from the claim text.