A - Human Necessities – 47 – C
Patent
A - Human Necessities
47
C
A47C 3/00 (2006.01) A47C 1/023 (2006.01) A47C 1/032 (2006.01) A47C 3/026 (2006.01) A47C 7/46 (2006.01)
Patent
CA 2304816
A chair (20) is provided having a base assembly (21) including a base frame, a back frame (30) pivoted to the base frame for movement between upright and reclined positions, and a seat (24) slidably supported on the base frame and pivoted to the back frame so that the seat moves forwardly and its rear moves forwardly and downwardly with the back frame upon recline. A flexible back is connected to the back frame at top and bottom locations and is provided with lumbar adjustment for improved lumbar force/support and shape. A seat is provided with seat depth adjustment and with active and passive thigh flex support. A novel energy mechanism (27) is provided that includes a transverse spring (28), a lever (54), and a moment arm shift adjuster (29) for adjusting the spring tension on the back frame. The moment ann shift adjuster is readily adjustable and includes an overtorque device to prevent damage to components of the energy mechanism.
L'invention porte sur une chaise (20) comportant une base (21) composée d'un pied, d'un cadre dorsal (30) monté pivotant sur le pied et pouvant passer d'une position droite à une position inclinée, et d'un siège (24) monté, coulissant sur le pied, et pivotant sur le cadre dorsal, de manière à ce que quand le siège avance et que sa partie arrière avance et s'abaisse, le cadre dorsal s'incline. Un dossier souple, fixé au cadre dorsal par le haut et le bas comporte un soutien lombaire permettant d'ajuster la force de soutien et la forme. Le siège est muni d'un réglage de profondeur et d'un support souple actif et passif pour les cuisses. La chaise comporte en outre un nouveau mécanisme (27) "énergétique" comportant un ressort transversal (28), un levier (54) et un réglage (29) à bras de moment de la tension du ressort du cadre dorsal, facile à ajuster, et doté d'un limiteur de couple empêchant d'endommager les pièces du mécanisme énergétique.
Battey Robert J.
Dammermann Arnold B.
Dekraker Larry
Ekdahl Kevin A.
Heidmann Kurt R.
Borden Ladner Gervais Llp
Steelcase Inc.
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