Abstract: A trolley (1), for a beam-mounted supply unit, for fastening medical devices to a ceiling. The trolley has a chassis (2) which can be meshed with a rail track of the beam-mounted supply unit for moving the trolley (1) along the rail track. A medical device can be fastened to the trolley (1). The trolley has a brake unit (3) with at least one braking element (7), which exerts a braking force on the rail track and/or on the chassis in the activated state of the brake unit (3), so that a movement of the chassis along the rail track is at least made difficult compared to an operating state with the brake unit (3) deactivated. In the activated state of the brake unit (3), the braking force exerted by the braking element (7) on the rail track and/or on the chassis is generated without the aid of electric energy.

Abstract: A support arm system (10) has at least one lockable articulated connection (16). A locking device (20) is associated with the articulated connection (16). The locking device (20) includes a passive drive (32) as well as an actuating device (36) associated with the locking device (20) with an active drive (38). The active drive (38) acts in the same plane as the passive drive (32).

Abstract: A trolley (1), for a beam-mounted supply unit, for fastening medical devices to a ceiling. The trolley has a chassis (2) which can be meshed with a rail track of the beam-mounted supply unit for moving the trolley (1) along the rail track. A medical device can be fastened to the trolley (1). The trolley has a brake unit (3) with at least one braking element (7), which exerts a braking force on the rail track and/or on the chassis in the activated state of the brake unit (3), so that a movement of the chassis along the rail track is at least made difficult compared to an operating state with the brake unit (3) deactivated. In the activated state of the brake unit (3), the braking force exerted by the braking element (7) on the rail track and/or on the chassis is generated without the aid of electric energy.

Abstract: A support arm system (10) has at least one lockable articulated connection (16). A locking device (20) is associated with the articulated connection (16). The locking device (20) includes a passive drive (32) as well as an actuating device (36) associated with the locking device (20) with an active drive (38). The active drive (38) acts in the same plane as the passive drive (32).

Abstract: A ceiling-mounted supply unit (1) for fastening the medical device (8) on the ceiling-mounted supply unit (1), includes a vertical beam (2), an extension arm (3), to which the vertical beam (2) is fastened especially with a hinge (4), for moving, especially pivoting the vertical beam (2) and electrical and/or pneumatic supply lines with electrical and/or pneumatic connections (21). A medical device (8) is integrated in the vertical beam (2).