A marine life harvesting method and apparatus in which a vessel (10) has a marine life capturing device (12) consisting of telescopic booms (14, 16, 18) to which are attached a mesh or net (20). The capturing device (12) has an inlet orifice (74) and an outlet orifice (76) the outlet orifice communicating with a marine life harvesting device, which may be a passage (42) through the hull (40) of the vessel, marine life entering the inlet orifice as the vessel travels across the body of water, and...

A multihull vessel has a center section; a pair of floats displaceable from normal operative positions laterally extended on either side of the center section upwardly to positions above the center section and inwardly toward the center axis of the vessel as well as downwardly toward any hull or sides of the center section and inwardly to positions below any superstructure of the center section; arms consisting of pivotally mounted and jointed members connecting the floats to the center section ...

To enable the benefits to be obtained simultaneously of using cast iron as a major constituent and of using helical prestressing, the cylindrical wall structure of a pressure vessel (which may be for a nuclear reactor) is made of truncated wedge shaped cast-iron slabs (the wedge faces of the slabs lying in radial planes of the wall structure and mutually adjacent slabs abutting one another in those planes, with a plurality of such slabs forming an annular assembly and a plurality of such assembl...

A process for storing materials under predetermined positive or negative pressure comprising inserting and sealing a fragile storage container within a gas-tight outer container capable of withstanding a pressure differential on opposite sides of its walls respectively greater or less than the said predetermined positive or negative pressure, and substantially filling the interspace between the two containers with a liquid, the fragile container incorporating pressure equalizing means whereby th...

A pressure vessel for containing fluid at very high pressures is formed from an axially aligned array or stack of like, flexible, relatively thin, dished discs, i.e., Belleville springs. The discs are clamped together axially, so as to flatten them into a pressure vessel wall structure which is pre-stressed in hoop compression along a bore formed by the aligned inner peripheries of the discs, and in hoop tension along the aligned outer peripheries of the discs. Such pre-stress pattern is particu...

The specification discloses a multi-purpose cargo ship which has cargo-carrying holds with between decks which are fully collapsable. The between decks are composed of panels which are hinged for folding into vertical planes against the boundary walls of the hatchways. When the between decks are in use they separate the holds into upper and lower compartments for carrying different types of cargo. When the between decks are collapsed the vessel can be used as a full bulk cargo carrier and is sel...

A pressure vessel of double ring construction comprising inner and outer concentric vessels with an annular interspace between the two vessels. Liquid is pressurized in the interspace to support the inner vessel. The inner vessel is supported without constraint from the outer vessel and the ends of the interspace are closed by joints which allow freedom of radial expansion of the ends of the inner vessel without giving rise to stressing of the adjacent ends of the outer vessel. In a particular a...

A prestressed pressure vessel having an opening in one of its external surfaces to the interior thereof, and a removable closure member for closing the opening. The removable closure member includes an inner lid for engaging the one surface and an outer lid spaced from the pressure vessel by the inner lid and forming with the inner lid a fluidtight enclosure therebetween in which fluid under pressure can be supplied so as to move the inner and outer lids relative one another. At least one securi...

Pressure vessels are formed on a hollow aluminum mandrel having an external surface of a configuration corresponding to the desired internal shape of the vessels. An impervious vessel inner liner is formed on the mandrel as by electro-deposition, and the vessel wall is then formed by winding filamentary reinforcing material on the inner lining, impregnating such material with a resinous material, curing the resinous material, and then removing the hollow aluminum mandrel chemically by use of an ...

The present invention relates to a pressure vessel in the form of a container having an enlarged mouth with an externally threaded outer periphery. A cover member having a depending internally threaded wall portion is adapted to be screwed onto the threaded mouth of the container, the cover member and the container having ports leading thereinto. A deformable partition in said container divides the latter into two variable volume chambers in communication respectively with said ports, said defor...