Abstract: A tool (1) comprises a body (40) having a through-going opening (9) and one or more elongate flexible elements (12, 22). The tool comprises a movable element (30) with an associated drive unit (6) and at least one control unit (11, 21). The elongate flexible elements (12, 22) are connected at one end to the movable element (30) and at another end to a control unit (11, 21), and the movable element is configured to extend at least a portion of at least one of the elongate flexible elements into the opening (9). The movable element (30) may be a ring gear drivingly connected to the drive unit, and the connection members (13, 23) are preferably connected to the ring gear at diametrically opposite sides. The tool may be used as a wiper tool for wiping substances from the outer wall of a tubular element or a rod element, such as a drill pipe (3).

Abstract: The present invention relates to a valve providing air ventilation in and out of ballast tanks in ships, and especially to an air vent head providing free flow of air in and out of ballast tanks while at the same time prevents seawater to enter uncontrollably into the ballast tanks via the air inlet.