Hydraulic chair height adjustment mechanism

F - Mech Eng,Light,Heat,Weapons – 16 – C

Patent

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Details

F16C 3/03 (2006.01) A47B 9/10 (2006.01) A47C 3/30 (2006.01) F16F 9/00 (2006.01) F16F 9/10 (2006.01) F16F 9/32 (2006.01) F16F 9/34 (2006.01) F16F 9/56 (2006.01) F16F 13/08 (2006.01)

Patent

CA 2190877

An adjustement mechanism (16) for adjusting the height of a chair seat (10), table top or the relative position of other items includes an outer support tube (30) and a telescoping, column tube subassembly (32). The column tube subassembly (32) includes an inner support tube (46), a cylinder (62) and a piston (118) and piston rod subassembly (64). The piston rod is connected to the piston at one end and to the outer support tube at the other end. An elastomeric sleeve (68) surrounds the cylinder. A valve (152) controls flow of hydraulic fluid from the interior of the cylinder to and from an expandable chamber defined by the elastomeric sleeve. The piston snap fits onto the piston rod and allows rotation of the column tube subassembly with respect to the outer support tube. A shock-absorbing element (220) is disposed in the cylinder.

Un mécanisme de réglage (16) permettant de réguler la hauteur du siège (10) d'une chaise, d'un dessus de table ou la position relative d'autres objets, comprend un tube de support externe (30) et un sous-ensemble de tube de colonne télescopique (32). Le sous-ensemble de tube de colonne (32) comprend un tube de support interne (46), un cylindre (62), un piston (118) et un sous-ensemble à tige de piston (64). La tige de piston est reliée au piston à une extrémité et au tube de support externe à l'autre extrémité. Un manchon élastomère (68) entoure le cylindre. Un clapet (152) commande l'écoulement de fluide hydraulique depuis l'intérieur du cylindre vers et depuis une chambre d'expansion définie par le manchon élastomère. Le piston s'adapte à déclic sur la tige de piston et permet la rotation du sous-ensemble de tube de colonne par rapport au tube de support externe. Un élément d'absorption des chocs (220) est disposé dans le cylindre.

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