A stand (3) for a surgical microscope comprising at least one vertical rotary bearing (4). A pivot arm (5) is mounted rotatably in the rotary bearing (4). An electromagnetic brake (6) for blocking the pivoting motion of the pivot arm (5) in the rotary bearing (4) is provided. A mechanical brake (7) with...http://www.google.ca/patents/US7128300?utm_source=gb-gplus-sharePatent US7128300 - Stand for a surgical microscope
