Chairs

Details Chairs Chairs

A - Human Necessities

47

C

A47C 1/032 (2006.01)

Patent

CA 2472046

A chair having a tiltable back part (3) and a separately tiltable seat part (1) mounted on a base part (2) has a mexhanism including a main compression spring (10) which provides adjustable resistancce to the tilting movement. The spring (10) is generally level and has rear ends (10B) which coacts with positionally adjustable members (13 or 21, 22) which defines a shaped path of movement for the spring ends (10b). In one embodiment the members (13) have shaped surfaces over which rollers (8a) run, and cams (15) are used to pivotally adjust the position of the members (13). In another embodiment th members (21) are links (21) pivotally supported on positionally adjustable receiving structures (22), and cams (23) are used to adjust the positions of the structures and hence change the pivot points of the links (21).

L'invention concerne une chaise possédant un dossier inclinable (3) et un siège séparément inclinable (1) montés sur une base (2) comportant un mécanisme incluant un ressort principal de compression (10) conférant une résistance ajustable au mouvement d'inclinaison. Le ressort (10) est généralement de niveau et possède des extrémités arrières (10B) agissant de concert avec des éléments ajustables en position (13 ou 21, 22) définissant pour les extrémités de ressort (10b) une courbe de déplacement. Dans une réalisation les éléments (13) possèdent des surfaces formées sur lesquelles des galets (8a) roulent, et on utilise des cames (15) afin d'ajuster par pivot la position des éléments (13). Dans une autre réalisation, les éléments (21) sont des liaisons (21) supportées pivotantes sur des structures de réception ajustables en position (22), et on utilise des cames (23) afin d'ajuster les positions de ces structures, ce qui change les points de pivot des liaisons (21).

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