Adjustable progressive joint-brake system

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

Patent

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Details

F16M 11/06 (2006.01) F21V 21/26 (2006.01)

Patent

CA 2475514

A joint (52) for connecting arm portions (40, 42) of a ceiling or wall mounted support system includes housing members (60,62) with an annular bearing (64) interposed between opposed surfaces (82,84) thereof. The housing members are clamped together on an axle (98) such that a braking force generated between the bearing and the housing member surfaces opposes rotation of one arm portion relative to the other. A variable braking force is generated between the bearing and surfaces (206) of the housing members which are generally perpendicular to the opposed surfaces (82, 84). The variable braking force is generated by a spring (182) and is greatest when the arm supporting a piece of equipment (24, 26, 28, 56) is at its lowest point, relative to the horizontal. This overcomes the increased forces in the spring which otherwise tend to cause the arm portion (42) to drift upward.

L'invention concerne une articulation (52) servant à relier des parties de bras (40, 42) d'un système de support suspendu au plafond ou mural, comprenant des éléments de logement (60, 62) contenant un roulement annulaire (64) disposé entre les surfaces opposées (82, 84) des éléments de logement (60, 62). Les éléments de logement sont serrés l'un contre l'autre sur un axe (98), de façon qu'une force de freinage produite entre les surfaces du roulement et des éléments de logement s'oppose à la rotation d'une partie de bras par rapport à l'autre partie de bras. Une force de freinage variable est produite entre le roulement et les surfaces (206) des éléments de logement, la force étant globalement perpendiculaire aux surfaces opposées (82, 84). La force de freinage variable est produite par un ressort (182) et est maximale lorsque le bras sur lequel est monté un appareil (24, 26, 28, 30) est situé à son point le plus bas, par rapport à la position horizontale. Cette caractéristique permet d'éviter que les forces dans le ressort ne ramènent ladite partie de bras (42) vers le haut.

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