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4346937 Dredging apparatus including suction nozzles
Volume 14/Number 3/March 1983
4344631 PRESSURE INSENSITIVE LIP SEAL Leo W Winn, assigned to Mechanical Technology Incorporated J2
A lip seal for preventing the mixing of seawater with an oil cavity around a marine stern tube includes an annular radial flange attached to one end of an axially extending bushing which is encircled by a garter spring. An axially extending foot projects from the bushing into the oil cavity and includes a hydrodynamic profile on its inner surface. A pocket is formed in the sealing face of the bushing and is pressurized with oil by the hydrodynamic profile on the bushing. The pressurized oil pocket balances the water pressure on the outside of the seal, and the hydrodynamic profile forms a fluid film which lubricates the seal and provides the balancing pressure for the pocket. A series of vents can be provided to vent excess oil pressure in the pocket to prevent leakage of oil out of the pocket into the water.
4344847 PROCESS FOR OBTAINING ENERGY, SOFT WATER AND BY-PRODUCTS FROM AQUEOUS SUBSTANCES Edouard P Grenet, Asnieres, France The aqueous substance, for example sea water, is boiled, the steam produced is fed under pressure into a turbo-alternator turbine producing electricity, the residual steam is reduced into soft water and the residue of evaporation, for example sea salt, is recovered as a by-product. The steam is fed directly or on leaving the turbine onto iron heated to about 800 degrees C., wfiich supplies hydrogen and as a by-product ferric oxide. The initial source of energy is, besides solar energy, any known source of energy, such as coal situated at great depths. The starting aqueous substance is, apart from sea water, waste sludges, a rock salt solution or
a mixture of sludges and salt solution. In the case of sludges, the by-product is a dry and sterilized fertilizer transformable into fuel bricks. The salt residue is transformable by electrolysis into hydrogen and sodium chlorate, which is a fuel. The sludge-salt residue supplies a combustible mixture. Dried sludges-sodium chlorate, is mixable with household waste for promoting the combustibility thereof. The sodium chlorate can be transformed into potassium chlorate and the steam under pressure may be condensed in distant reservoirs and its heat recovered. The energies produced in the turbo alternator or fuel-by products are usable in the process.
4346937 DREDGING APPARATUS INCLUDING SUCTION NOZZLES John P Latimer, Robert M Donaldson, Ted W Christian, Glenn E Miller, assigned to Deepsea Ventures Inc "l.
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There is provided a dredge vehicle supporting a dredge assembly for collecting ore particles from the ocean floor. The dredge assembly includes several nozzles extending forwardly of the supports for the vehicle, pump means for developing a suction flow into and through the nozzles and a screen to separate the ore particles from most of the water before feeding the ore into, e.g., an airlift system leading to a surface vessel. Preferably, an intake of clear water from above the vehicle is used to carry the ore to and up the airlift system. Advantageously, the water flows straight through the system and exhausts from the rear of the vehicle, and mud is cleared from the ore before bringing the ore to the surface.
4351623 UNDERWATER STORAGE OF OIL 119
4344631 PRESSURE INSENSITIVE LIP SEAL Leo W Winn, assigned to Mechanical Technology Incorporated J2
A lip seal for preventing the mixing of seawater with an oil cavity around a marine stern tube includes an annular radial flange attached to one end of an axially extending bushing which is encircled by a garter spring. An axially extending foot projects from the bushing into the oil cavity and includes a hydrodynamic profile on its inner surface. A pocket is formed in the sealing face of the bushing and is pressurized with oil by the hydrodynamic profile on the bushing. The pressurized oil pocket balances the water pressure on the outside of the seal, and the hydrodynamic profile forms a fluid film which lubricates the seal and provides the balancing pressure for the pocket. A series of vents can be provided to vent excess oil pressure in the pocket to prevent leakage of oil out of the pocket into the water.
4344847 PROCESS FOR OBTAINING ENERGY, SOFT WATER AND BY-PRODUCTS FROM AQUEOUS SUBSTANCES Edouard P Grenet, Asnieres, France The aqueous substance, for example sea water, is boiled, the steam produced is fed under pressure into a turbo-alternator turbine producing electricity, the residual steam is reduced into soft water and the residue of evaporation, for example sea salt, is recovered as a by-product. The steam is fed directly or on leaving the turbine onto iron heated to about 800 degrees C., wfiich supplies hydrogen and as a by-product ferric oxide. The initial source of energy is, besides solar energy, any known source of energy, such as coal situated at great depths. The starting aqueous substance is, apart from sea water, waste sludges, a rock salt solution or
a mixture of sludges and salt solution. In the case of sludges, the by-product is a dry and sterilized fertilizer transformable into fuel bricks. The salt residue is transformable by electrolysis into hydrogen and sodium chlorate, which is a fuel. The sludge-salt residue supplies a combustible mixture. Dried sludges-sodium chlorate, is mixable with household waste for promoting the combustibility thereof. The sodium chlorate can be transformed into potassium chlorate and the steam under pressure may be condensed in distant reservoirs and its heat recovered. The energies produced in the turbo alternator or fuel-by products are usable in the process.
4346937 DREDGING APPARATUS INCLUDING SUCTION NOZZLES John P Latimer, Robert M Donaldson, Ted W Christian, Glenn E Miller, assigned to Deepsea Ventures Inc "l.
% • "
/"
-
, A
There is provided a dredge vehicle supporting a dredge assembly for collecting ore particles from the ocean floor. The dredge assembly includes several nozzles extending forwardly of the supports for the vehicle, pump means for developing a suction flow into and through the nozzles and a screen to separate the ore particles from most of the water before feeding the ore into, e.g., an airlift system leading to a surface vessel. Preferably, an intake of clear water from above the vehicle is used to carry the ore to and up the airlift system. Advantageously, the water flows straight through the system and exhausts from the rear of the vehicle, and mud is cleared from the ore before bringing the ore to the surface.
4351623 UNDERWATER STORAGE OF OIL 119