A disc drive having a base plate and an information storage disc supported for rotation by a drive motor on the base plate. The disc drive further includes a rotary actuator assembly mounted on the base plate adjacent the information storage disc. The actuator assembly has an actuator arm carrying a...http://www.google.de/patents/US6507462?utm_source=gb-gplus-sharePatent US6507462 - Disc drive voice coil motor with shroud feature
