Support arm

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

Patent

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Details

F16M 11/04 (2006.01) B23K 37/04 (2006.01) B25J 18/00 (2006.01) B25J 19/00 (2006.01)

Patent

CA 2302324

A support arm has a support structure and an arm structure connected to the support structure through a pivotal connection for pivoting about a horizontal axis. A device is provided for adjusting the elevation of the arm structure by pivoting it about the horizontal axis. A support base is connected to the arm structure through a pivotal connection for pivoting relative to the arm structure about an axis that is parallel to the horizontal axis. A support member is connected to the support base through a pivotal connection for pivoting about a vertical pivot axis, and auxiliary structure such as an air extraction arm may be connected to the support member. A linkage between the support base and the support structure maintains the pivot axis of the support base parallel to a vertical axis as the elevation of the ann structure is adjusted, and avoids the auxiliary structure from swinging under the influence of gravity to a neutral position different from that desired by an operator.

L'invention concerne un bras de support qui possède une structure de support et une structure de bras reliée à la structure de support au moyen d'une connexion par pivot qui lui permet de pivoter autour d'un axe horizontal. Un dispositif permet de régler la hauteur de la structure de bras en la faisant pivoter autour de l'axe horizontal. Une base de support est reliée à la structure de bras au moyen d'une connexion par pivot, ce qui lui permet de pivoter par rapport à la structure de bras autour d'un axe parallèle à l'axe horizontal. Un élément de support est relié à la base de support au moyen d'une connexion par pivot lui permettant de pivoter autour d'un axe de pivot vertical. On peut relier à l'élément de support une structure auxiliaire telle qu'un bras d'extraction d'air. A mesure que l'on règle la hauteur de la structure de bras, une liaison entre la base de support et la structure de support maintient l'axe de pivot de la base de support parallèle à un axe vertical. Cela empêche la structure auxiliaire de pivoter sous l'effet de la gravité et de se mettre en une position neutre, différente de celle désirée par l'opérateur.

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