658results about "Non-magnetic metal hulls" patented technology

The technical disclosure herein describes an autonomous water-borne vehicle having a segmented non-planing hull with free flood fore and aft sections and a sealed center section. The disclosure also described such a vehicle having a fixed longitudinal thruster and a fixed lateral thruster for changing the heading of the vehicle. The disclosure also described such a vehicle having an autonomous mission system, an autonomous navigation system, and a web-based command and control system. The disclosure also describes such a vehicle having a submersible winch. The disclosure also describes such a vehicle wherein the sealed center section is of substantially rectangular cross section. The disclosure also describes such a vehicle having a wheeled battery tray.

A composite aluminium panel comprising two parallel plates and / or sheets secured to the peaks and troughs of a corrugated aluminium stiffener sheet between the parallel plates and / or sheets, wherein the corrugated aluminium stiffener sheet is made from an aluminium alloy rolled sheet of composition (in weight percent): Mg 1.5-6.0, Mn 0.3-1.4, Zn 0.4-5.0, Fe up to 0.5, Si up to 0.5, Zr up to 0.30; optionally one or more of Cr 0.05-0.3, Ti 0.01-0.20, V 0.05-0.25, Ag 0.05-0.40, and Cu up to 0.40; and other elements up to 0.05 each, 0.15 total, with a balance of Al; and having in an H-condition or in an O-condition a ratio of PS / UTS in the range of 0.4 to 0.9 and having good roll formability.

There is provided a buoyancy system for a structure having at least one component being substantially stationary with respect to the bottom of a water covered area. The system comprises a set of buoyancy modules of engineered materials to apply an identified amount of buoyancy. The set of buoyancy modules is attached to the structure at a set of buoyancy load transfer locations. The set of buoyancy modules comprises layers of the engineered materials. The engineered materials comprise a substantially reinforced axial layer, a substantially reinforced hoop layer; and a leak prevention layer.

A boat having a deck and a hull includes a suspension for suspending the deck with respect to the hull. Sensors are employed to determine motion of the deck, with a controller adjusting the suspension such that it maintains the pose of the deck with respect to an inertial reference and with respect to pitch, roll, and heave of the deck.

The present document describes a dock unit attachable to another dock unit with a fastener for forming a floating dock. The dock unit comprises a floating body having a mating surface and an attachment adapted to receive the fastener. Thereby attaching the floating body is able to be attached to the other dock unit. The dock unit further comprises a cover for covering the mating surface, the cover having a contact surface adapted to contact the fastener. In use, the contact surface is positioned proximate the attachment so that, when the attachment receives the fastener, the contact surface is contacted by the fastener, thereby limiting the movement of the cover with respect to the floating body.

A shaped inflatable water sports board is presented. The inflatable water sports board includes an airtight elongated housing having a predetermined shape. An internal structure is contained within the housing for substantially maintaining the predetermined shape when the board is inflated. An inflation valve is provided for inflating the board where when the board is inflated the board is sufficiently rigid to maintain the predetermined shape under the weight of an adult

The invention is directed to a molded foam sports board made by steps: molding a foam core having a molded contour surface; laminating an extruded adhesive resin layer to a polyolefin foam sheet layer forming a film foam laminate; and thermoforming and heat laminating the film foam laminate to the molded foam core by pressing the molded foam core towards the film side of the film foam laminate and mating against the profile of a thermoforming bottom die surface. The board has a thermoformed polyolefin foam skin having an outer surface and an inner surface, a molded foam core having a molded contour surface, an extruded adhesive resin layer bonding the inner surface of polyolefin foam skin layer to the molded contour surface of the molded foam core. The molded foam core may comprise homopolymer or copolymer of expanded polystyrene foam, expanded polyethylene foam, expanded polypropylene foam and polyurethane foam.

An underwater launch system includes a launch tube frangibly sealed at its forward end. At launch time, pressure equalization means introduces water at depth pressure into the launch tube between its frangibly sealed ends. A rotary electromagnetic pump coupled to the launch tube receives water at depth and expels the water at a higher pressure. The higher pressure water is coupled to the aft end of the launch tube.

Discloses skin and interior core structures made shape-adjustable with a layer of skin core forming a pre-molded perimeter rail; exterior structural skin can be molded using a convex shape-defining mold to produce a plurality of different shapes; separate subparts give the mold the capacity to describe different curves and modify different parameters of the board's design. Mold is reversible; male / female configurations produce convex shape-defining substrates allowing a wide array of different shapes. Board is fabricated without use of any concave shape-defining surface, and therefore without the high manufacturing costs and structural problems of prior art female molds.

A mold and construction method for forming aquatic sports boards is provided. The method and molds provide skin and interior core structures made shape-adjustable by a pre-molded perimeter rail. Division(s) in the structural exterior skin allow the skin core to be trimmed and bonded to a variety of convex, shape-defining core structures to produce a plurality of different shapes. A reusable shape-defining mold allows the board structure to be modified in shape. The mold is reversible and male / female configurations produce convex, shape-defining board substrates for a wide array of custom designs.

A sport board for snow sledding or surf body boarding comprises a multi-layered laminated composite foam core coupled with stiffening elements for mechanical strengthening of the board. The composite foam core comprises laminates of polyolefin foam base and stiffening elements composed of substantially polymer foam and has substantial higher compressive strength and flexural strength than the foam base. A front section may be made of the same blank material as the low density polyolefin foam base and is bonded to the front end of the foam core complex to give a full frontal flexibility for a higher directional control by the rider and improved shock absorbing property. Upper and lower polyethylene foam sheets wrap the foam core complex subassembly and head section for sled integrity and graphic film finishes the sled top, the bottom is also finished with a polyethylene sheet for slickness.

Motorcycle, marine, and racing components are formed of a conductive loaded resin-based material. The conductive loaded resin-based material comprises micron conductive powder(s), conductive fiber(s), or a combination of conductive powder and conductive fibers in a base resin host. The percentage by weight of the conductive powder(s), conductive fiber(s), or a combination thereof is between about 20% and 50% of the weight of the conductive loaded resin-based material. The micron conductive powders are metals or conductive non-metals or metal plated non-metals. The micron conductive fibers may be metal fiber or metal plated fiber. Further, the metal plated fiber may be formed by plating metal onto a metal fiber or by plating metal onto a non-metal fiber. Any platable fiber may be used as the core for a non-metal fiber. Superconductor metals may also be used as micron conductive fibers and / or as metal plating onto fibers in the present invention.

Apparatus for providing an enclosure, for example as a housing or to provide buoyancy, at underwater locations is disclosed comprising an inner shell and an outer shell, with a structural filler disposed between the two. The shells are prepared from fibre-reinforced plastic, with the fibres being oriented to provide resistance to both longitudinal and radial stresses induced in the apparatus by the hydrostatic pressure. The filler may be a structural filler comprising structural members extending between the inner and outer shells and occupying less than 60% of the volume of the cavity between the two shells. Alternatively, the filler may be a substantially void-free structural filler, such as a polyester resin. Methods of fabricating the apparatus are disclosed. In addition, a method of deballasting a buoyancy module is disclosed, in which the ballast, for example water, is withdrawn from the module by means of reduced pressure. Apparatus for deballasting is also disclosed.

A corrosion resistant prestressed float unit including a buoyant core encased within a polymeric coating, concrete encasing the core and polymeric coating, a corrosion resistant mesh to reinforce the concrete, and a plurality of corrosion resistant pretensioned fiber members extending the entire length of the unit.

A pontoon for floating a watercraft, wherein the pontoon has a skin forming a closed body, a foam coupled to the skin within the closed body, and integral features formed by the skin. The integral features may include a support structure for mounting a watercraft structure.

The present invention relates to compositions for producing poly(meth)acrylimide foams having reduced flammability which comprise ammonium polyphosphate and / or zinc sulphide. Furthermore, the present invention also provides poly(meth)acrylimide moulding compositions and also poly(meth)acrylimide foams obtainable from the abovementioned compositions and moulding compositions. The present invention further relates to processes for producing poly(meth)acrylimide foams having reduced flammability.

This floating support (1) for an offshore structure, in particular such as a wind turbine, of the type including means in the form of a support mast (2), the upper part of which is associated with the structure and the lower part of which is associated with means in the form a float (3), is characterized in that the means in the form a float (3) comprise means in the form of a cage (9, 10, 11) for receiving buoyancy tanks (12).

A multi-purpose catamaran is disclosed in the present invention, comprising hulls and deck, wherein the hulls are two hulls, the central of the deck is arranged a movable deck, a detachable crane is set over the movable deck for hanging a fishing net or a fishing cage. The catamaran according invention can be easily disassembly and assembly, and expediently be carried and used. The fishing net or the fishing cage can be immerged in water for transiting live fish carried in it, can conveniently transfer to the deep water region for cultivating or to the shallow water region to disembark, removing the hoop can easily hoist it to the dock and can be easily transferred to a truck. The present invention has multi-purpose, except for using to retract and place fishing cage, to transfer aquatic products or personnel, or be as small-sized tow net, also can be used for selling, fishing etc. The present invention manufacturing method is simple, and can easily manufacture the catamaran without a model, suitable for fisherfolks to manufacture the catamaran by themselves, and the catamaran has lower cost.

The present invention relates to lightweight components of hybrid design, also termed hybrid component or hollow-chamber lightweight component, composed of a parent body which is composed of galvanized iron and which is reinforced by means of thermoplastics and is suitable for the transmission of high mechanical loads.

Flooring underlayments may be formed by combining an epoxy based resin component, a curing agent component, and an aggregate component. The resulting underlayment may be a lightweight material with a low viscosity that allows the underlayment to be self-leveling. Further, the underlayment may be designed for application in both wet and dry spaces. In certain embodiments, the underlayment may have a weight less than approximately 7.8 kg / m2 (1.6 lb / ft2) when applied at a nominal thickness of 0.635 cm (0.25) inches. Moreover, the underlayment may be designed to conform to the SOLAS requirements administered by the International Maritime Organization (IMO). Specifically, the underlayment may be designed to conform to IMO Resolution MSC.61(67).

The invention concerns a composite part, comprising an elongated foam core and a flow channel media attached to a first elongated side thereof. The flow channel media forms interstices for the passage of resin. At least one fabric layer is secured to the elongated foam core, and encloses a first elongated side of the foam core, including the flow channel media. In this way, a resin flow path is defined along the first elongated side. The fabric layer can further enclose at least a second and third elongated side of the foam core where, where each of the second and third elongated sides adjoin the first elongated side. Fabric tab portions can be provided extending from the second and third elongated sides for aiding in the installation of the composite part in a larger composite structure.

The present invention relates to a liquefied gas storage barge in the form of a concrete floating structure. The barge of the invention is essentially constituted by a floating structure (1) of reinforced and prestressed concrete containing tanks (2) for liquefied gas. Said tanks (2) are cylindrical tanks each having a cross-section perpendicular to its longitudinal axes that comprises a preferably circular curved portion (3) corresponding to the bottom of said tank, said portion being preferably a bottom half-circumference resting directly on the concrete bottom of the barge, which barge bottom is in the form of adjacent part-cylindrical troughs (3), each part-cylindrical trough having the same preferably circular, partially curved section in register with the bottom of each tank.