Pneumatically or hydraulically controlled clampable ball-and-socket joint for retaining instrument holder during surgery, has pressure cylinder housing portion whose closure side comprises hole for retaining locking bolt

摘要

The joint has outwardly guided ball pins (4) whose ball is movably supported in a ball bearing shell (14). A ball bearing brake is movable against the ball bearing shell, and a ball bearing housing comprises a pressure cylinder housing portion (1) and a ball bearing shell housing portion (3), where the ball pins, a pressure cylinder, the bearing brake and the ball bearing shell are arranged in the housing portions. A locking bolt (2) is arranged on a closure side of the shell housing portion. A closure side of the cylinder housing portion comprises a hole for retaining the bolt.