Ships – Implements – Hull cleaning
Patent
1991-10-24
1993-05-18
Sotelo, Jesus D.
Ships
Implements
Hull cleaning
15 17, B63B 5900
Patent
active
052111253
ABSTRACT:
For cleaning and/or painting the exterior of a ship hull while the ship is in dry dock, one or more staging devices are provided. Each includes a metal framework tower supporting a vertically movable elevator assembly that comprises a trolley, from which a variably laterally projecting platform is supported on articulated, cantilevered arms. Adjustable, non-porous shrouds enclose a volume of space between the outside of the tower and an increment of one side of the exterior of the ship hull, from above, fore, aft and outside. Cleaning and painting operations are conducted from the platform on the hull increment, and debris is removed from the dry-dock deck area enclosed by the shroud, after which the device is moved by crane, typically twenty feet (6.1 m), towards the ship's bow or stern. The shrouds are then adjusted so that a further hull increment can be worked on. The trolley and extension-retraction of the platform support arms are operated by electrohydraulic winch and hydraulic cylinders, respectively. The margins of the shroud may be fastened by magnets to the hull. Air drawn through the enclosed volume from above, is drawn out near the dry-dock deck for processing to remove dust and appropriately treat VOCs, if present.
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Aerial photograph of ship repair facility of Metro Machine Corporation, Norfolk, Virginia.
EPA report regarding cleaning and painting of ship' hulls.
Garland Charles
Goldbach Richard A.
McConnell Frank E.
McMichael James A.
Wagner William A.
Avila Stephen P.
Metro Machine Corporation
Sotelo Jesus D.
Tidewater Equipment Corporation
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