| 摘要 |
A dental instrument delivery system is provided which includes an articulated retaining arm (22) adjustable in a plurality of directions. The arm is connected to a cable mechanism (100, 136, 182) in the back rest (14) of a dental chair which allows the instruments carried by the arm to remain in a desired position when the back rest is tilted. Also included is a safety release system (78, 100, 118) which prevents damage to the arm and instruments it carries should they accidentally engage a solid object when the chair and/or back rest is raised or lowered. After disengagement of the solid object, the arm automatically returns to its original position. |
