Articulated arm for surgeon's chair

摘要

An articulated holding arm (2) comprises a first arm (3) and a second arm (5). The first arm (3) is essentially cylindrical as a whole, and is provided with at an intermediate area but closer to a proximal end (6) of the arm (3) a freely-rotatable first spherical element (7) fixed to a chair body (1). The first arm (3) is further provided with at a distal end (4) thereofto which the proximal end (6) ofthe arm (3) is mounted a second spherical element (8) in a freely rotatable manner. Provided between the first and second spherical elements (7,8) is a locking spindle (9) which is moveable in a longitudinal direction of the arm (3) with a very short interval (d). Provided at a proximal end (6) of the first arm (3) is a piston (11) which constantly pressurizes via a spring means (12) the first spherical element (7) in a direction of a tip of the piston (11) and can move the first spherical element (7) via a hydraulic means (14) or pneumatic means toward a side of the proximal end of the first arm (3) against the spring means (12). The second arm (5) is provided with at a distal end (19) thereof a supporting element (20) for supporting an arm (A) of a person seated (D).