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Shiplift
A shiplift is a modern alternative for a slipway, a dry dock, floating dry dock or a dry dock, graving dry dock. A shiplift is used to dry dock and launch ships. It consists of a structural platform that is lifted and lowered exactly vertically, synchronously by a number of hoist (device), hoists. First, the platform is lowered underwater, then the ship is floated above the support, and finally the platform with support and ship is lifted and the ship is brought to the level of the quay. Design Shiplifts are often supplied under rules of a classification authority. Lloyd's Register of Shipping is the authority with most experience in the certification or classification of shiplifts. Whereas "shiplift" is the word that is normally used, the term used by Lloyd's register is "Mechanical Lift Dock". There are two different kinds of platform design, the articulated and the rigid. The articulated platform has hinged connections between the main and the longitudinal beams. A rigid pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raymond Pearlson
Raymond Pearlson (born 2 March 1926) is an American marine engineer and the inventor of the Syncrolift System, which was designed to both launch ships and lift them out of the water for repair. Biography Pearlson was born in 1926 in New York City. After three years war service in the Navy he studied naval architecture and marine engineering at the University of Michigan, graduating in 1949 with a B.Sc. degree. He started his engineering career with the Newport News Shipbuilding and Dry-dock Company, spending the next few years working in various yard departments where he acquired a lot of practical shipbuilding knowledge. In 1953 he moved to work as Chief Engineer at Merrill Stevens, a small shipyard in Miami, Florida, where he was entrusted with the construction of a 300-ton lifting capacity boatlift and transfer system. During the process he developed an innovative drydocking concept using simple electro-mechanical components to overcome the inherent limitations of lifting cap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boat Lift
A boat lift, ship lift, or lift lock is a machine for transporting boats between water at two different elevations, and is an alternative to the canal lock. It may be vertically moving, like the Anderton boat lift in England, rotational, like the Falkirk Wheel in Scotland, or operate on an inclined plane, like the Ronquières inclined plane in Belgium. History A precursor to the canal boat lift, able to move full-sized canal boats, was the tub boat lift used in mining, able to raise and lower the 2.5 ton tub boats then in use. An experimental system was in use on the Churprinz mining canal in Halsbrücke near Dresden. It lifted boats using a moveable hoist rather than caissons. The lift operated between 1789 and 1868,Charles Hadfield ''World Canals: Inland Navigation Past and Present'', p. 71, and for a period of time after its opening engineer James Green reporting that five had been built between 1796 and 1830. He credited the invention to Dr James Anderson of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syncrolift
Syncrolift AS is a supplier of ship-handling equipment for shipyards. It manufactures the Syncrolift shiplift. Shiplift The Syncrolift shiplift is a piece of equipment for lifting boats, ships and vessels onto land and back at sea for maintenance work or repair. The vessel is maneuvered over a submerged cradle, which is then lifted by a set of synchronized hoists or winches. The vessel can be worked upon in place, or it can be moved inland. The largest shiplifts can lift vessels up to 100,000 tons. Because of this capacity, shiplifts have almost completely supplanted the older dry dock systems, most of which could handle only one vessel at a time. History The Syncrolift shiplift was invented in the mid 1950s by Raymond Pearlson when he was working as Chief Engineer for Merrill Stevens, a small Miami shipyard. In 1958 he formed Pearlson Engineering Company (PECO) to develop his invention. In 1979, PECO was taken over by the British engineering group Northern Engineering I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dry Dock
A dry dock (sometimes drydock or dry-dock) is a narrow basin or vessel that can be flooded to allow a load to be floated in, then drained to allow that load to come to rest on a dry platform. Dry docks are used for the construction, maintenance, and repair of ships, boats, and other watercraft. History China The use of dry docks in China goes at least as far back as the 10th century A.D. In 1088, Song dynasty scientist and statesman Shen Kuo (1031–1095) wrote in his '' Dream Pool Essays'': Europe Greco-Roman world The Greek author Athenaeus of Naucratis (V 204c-d) reports something that may have been a dry dock in Ptolemaic Egypt in the reign of Ptolemy IV Philopator (221-204 BC) on the occasion of the launch of the enormous '' Tessarakonteres'' rowing ship. However a more recent survey by Goodchild and Forbes does not substantiate its existence. It has been calculated that a dock for a vessel of such a size might have had a volume of 750,000 gallons of water. Renaiss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slipway
A slipway, also known as boat ramp or launch or boat deployer, is a ramp on the shore by which ships or boats can be moved to and from the water. They are used for building and repairing ships and boats, and for launching and retrieving small boats on trailers towed by automobiles and flying boats on their undercarriage. The nautical terms ways and skids are alternative names for slipway. A ship undergoing construction in a shipyard is said to be ''on the ways''. If a ship is scrapped there, she is said to be ''broken up in the ways''. As the word "slip" implies, the ships or boats are moved over the ramp, by way of crane or fork lift. Prior to the move the vessel's hull is coated with grease, which then allows the ship or boat to "slip" off the ramp and progress safely into the water. Slipways are used to launch (newly built) large ships, but can only dry-dock or repair smaller ships. Pulling large ships against the greased ramp would require too much force. Therefo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dry Dock
A dry dock (sometimes drydock or dry-dock) is a narrow basin or vessel that can be flooded to allow a load to be floated in, then drained to allow that load to come to rest on a dry platform. Dry docks are used for the construction, maintenance, and repair of ships, boats, and other watercraft. History China The use of dry docks in China goes at least as far back as the 10th century A.D. In 1088, Song dynasty scientist and statesman Shen Kuo (1031–1095) wrote in his '' Dream Pool Essays'': Europe Greco-Roman world The Greek author Athenaeus of Naucratis (V 204c-d) reports something that may have been a dry dock in Ptolemaic Egypt in the reign of Ptolemy IV Philopator (221-204 BC) on the occasion of the launch of the enormous '' Tessarakonteres'' rowing ship. However a more recent survey by Goodchild and Forbes does not substantiate its existence. It has been calculated that a dock for a vessel of such a size might have had a volume of 750,000 gallons of water. Renaiss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lloyd's Register Of Shipping
Lloyd's Register Group Limited, trading as Lloyd's Register (LR), is a technical and professional services organisation and a maritime classification society, wholly owned by the Lloyd’s Register Foundation, a UK charity dedicated to research and education in science and engineering. The organisation dates to 1760. Its stated aims are to enhance the safety of life, property, and the environment, by helping its clients (including by validation, certification, and accreditation) to improve the safety and performance of complex projects, supply chains and critical infrastructure. In July 2012, the organisation converted from an industrial and provident society to a company limited by shares, named Lloyd’s Register Group Limited, with the new Lloyd’s Register Foundation as the sole shareholder. At the same time the organisation gave to the Foundation a substantial bond and equity portfolio to assist it with its charitable purposes. It will benefit from continued funding from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quay
A wharf ( or wharfs), quay ( , also ), staith, or staithe is a structure on the shore of a harbour or on the bank of a river or canal where ships may dock to load and unload cargo or passengers. Such a structure includes one or more Berth (moorings), berths (Mooring (watercraft), mooring locations), and may also include piers, warehouses, or other facilities necessary for handling the ships. Wharves are often considered to be a series of docks at which boats are stationed. A marginal wharf is connected to the shore along its full length. Overview A wharf commonly comprises a fixed platform, often on deep foundation, pilings. Commercial ports may have warehouses that serve as interim storage: where it is sufficient a single wharf with a single berth constructed along the land adjacent to the water is normally used; where there is a need for more capacity multiple wharves, or perhaps a single large wharf with multiple berths, will instead be constructed, sometimes projecting ov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoist (device)
A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium. The most familiar form is an elevator, the car of which is raised and lowered by a hoist mechanism. Most hoists couple to their loads using a lifting hook. Today, there are a few governing bodies for the North American overhead hoist industry which include the Hoist Manufactures Institute, ASME, and the Occupational Safety and Health Administration. HMI is a product counsel of the Material Handling Industry of America consisting of hoist manufacturers promoting safe use of their products. Types The word "hoist" is used to describe many different types of equipment that lift and lower loads. For example, many people use “hoist” to describe an elevator. The information contained here pertains specially to overhead, con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trolleys Under Ship
Trolley may refer to: Vehicles and components * Tram, or trolley or streetcar, a rail vehicle that runs on tramway tracks * Trolleybus, or trolley, an electric bus drawing power from overhead wires using trolley poles ** Trolleytruck, a trolleybus-like vehicle used for carrying cargo * Tourist trolley, a rubber-tired bus designed to resemble an old-style streetcar or tram * Trolley (horse-drawn), a goods vehicle with four wheels of equal size mounted underneath it * Rail push trolley, a small vehicle for inspecting rail lines Tools * Airline service trolley, a small serving cart used by flight attendants inside an aircraft * Boat dolly, or trolley, a device for launching small boats into the water * Creeper (tool), a low-profile, wheeled platform used by auto mechanics * Flatbed trolley, or dray, for freight transport in distribution environments ** Piano trolley, a device for moving pianos * Golf trolley, a trolley designed for carrying a golf equipment * Laptop charging tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
