1918results about How to "Increase buoyancy" patented technology

The present invention relates to an oral drug delivery system with biphasic release characteristics comprising a porous matrix comprising at least one drug substance, sugar(s), a release retarding polymer, gas generating components and optionally, pharma-ceuti-cally acceptable auxiliary components wherein the pharmaceutical composition further comprises a coating of said drug substance. The pharmaceutical composi-tion, either in the form of pellets (multiparticulate or single unit dosage form), beads, granules, capsules or tablets, is retained in the stomach while selectively delivering the drug(s) at gastrointestinal levels and upper parts of the small intestine over an extended period of time. The release of the drug from the said pharmaceutical composition is characterized by a biphasic release profile of the drug substance, which exhibits both immediate and controlled release characteristics.

The invention relates to a new technology for lead zinc sulfide ore floatation. Lead sulfide mineral is preferably carried out with mixed floatation in a neutral or weak alkali medium, then zinc floating and lead sulfur separation are carried out in a high alkali medium. The lead sulfide mineral is firstly floated to enter product, before zinc floating, lead sulfide mixed product is obtained, only pure zinc mineral enters slurry in a zinc floating work zone, thus being beneficial to zinc floatation and avoiding the operation method of heavy pulling and heavy stress; and lead tailing has no sulfur mineral, thus reducing useless poor circulation formed in zinc floating of the sulfur mineral, saving the beneficiation reagent and improving the sorting standard.

The water walker assistant is a rectangular shaped buoyant frame with handles for assisting physically challenged individuals walk or float in water. The frame is made of interconnected elongated buoyant members, such as PVC tubing, which are fitted with sections of buoyant foam. The interconnected members define front, rear and side sections of the frame, and the front section is optionally a removable crossbar. The user enters the device by either removing the crossbar or placing the device over his/her body. The water walker assistant features two handles with hand-grips, and cushioned side sections to support the user's forearms inside the device. Elongated members with foam fittings extend from the rear and front of the invention, adding stability to the device, while providing shock absorption in the event of contact with obstacles.

A three-coil electromagnetic induction power transfer system is disclosed for epiretinal prostheses and other implants. A third, buffer coil is disposed between an external transmitting coil and a receiver coil buried within the body to improve efficiency and robustness to misalignments. One or more of the coils can be manufactured using micromechanical machining techniques to lay out conductors in a ribbon of biocompatible insulator, folding lengths of the insulated conductor traces longitudinally over one another, and then spiraling them into a ring. The traces change axial position in the ring by shifting across fold lines. One or more U-shaped sections on the traces can be folded so that adjacent traces can project opposite one another, lengthening the resulting ribbon that can be wound into a coil.

A swimwear garment made of ultra-violet resistant material encloses the body of a child when fastened-up, and has a back zip (3), sleeves (2A), leg openings and a neck opening (4). The garment incorporates buoyant panels (8) at its back and a front panel (11) which are formed with crease lines (9, 10, 14, 16) enabling them to conform closely to the child's chest without obstructing its movement during swimming. A flexible soft neck roll (6) of closed-cell, buoyant, foamed plastics material encircles the child's neck and holds the chin above water.

The present invention is directed towards methods of oil and gas well logging, monitoring, and the field of electrically powering submersible devices like electrical motors in oil and gas wells.

A wave energy device converts the motion of waves on a body of water into a usable form of energy, for example a flow of pressurized water or an electrical current. The device includes a buoyant body for tracking the rise and fall of the wave and a working surface coupled for movement with the buoyant body and which is designed to capture and convert both heave and surge forces of the waves. The device includes a rapid deployment and retrieval capability and a capability to rotate to accommodate changes in wave direction. The device is universally attached to the sea floor, which allows the device to pitch, yaw and roll with the wave forces from any direction, thereby reducing the likelihood of damage due to extreme weather or damage to or from marine traffic in the event of an encounter.

A gas vent valve assembly may be attached or incorporated to a disposable fluid transfer set used with a fluid warmer to administer an infusate to a patient. The gas vent valve assembly has a housing having a fluid inlet, a gas outlet and a fluid outlet. The gas outlet is located at the top of the housing while the fluid outlet is located at the bottom of the housing. The fluid inlet is located at a side lower portion of the housing. Inside the housing is an actuator float that has an upper seal and a lower seal. The dimension of the float relative to the chamber of the housing is such that the float is freely movable within the housing to an upper position whereby its upper seal closes the gas outlet while the fluid outlet is opened, and to a lower position whereby its lower seal closes the fluid outlet and the gas outlet is opened. The movement of the float is dependent on the respective amounts of air and fluid in the housing, and the buoyancy of the float relative to the fluid in the housing. When a predetermined volume of air gets inside the housing, the float sinks to its lower position to close the fluid outlet and open the gas outlet, so that the air inside the housing is vented to atmosphere while fluid is prevented from being output to the patient. When the amount of gas in the chamber has been reduced to a given volume, with a corresponding increase in the amount of fluid in the housing, the float is raised to open the fluid outlet, thereby enabling the fluid inside the housing to be output to the patient. At that time, the gas outlet is shut to prevent any reverse inflow of air into the housing.

The invention provides an integrated water treatment system suitable for use in the treatment of contaminated water, wastewater, potable water, aquaculture, industrial water and polluted water bodies. An integrated water treatment system according to at least one embodiment of the invention comprises a plurality of modules adapted to float in a body of water integrating a plurality of different attached growth biofilm media types positioned within a plurality of water flow paths and circulations. The conditions provided by a multiple of media types and plurality of flow paths creates a multiplier effect increasing the number of treatment zones and an increased diversity of interconnected treatment process zone types. Embodiments of the invention provide a diversity of conditions and biological habitats establishing a poly-culture of producers, consumers and higher organisms in an ecosystem of biological treatment processes, with complex metabolic pathways and food chains increasing treatment efficiency and the range of pollutants which may be effectively treated. Modules comprised in the system are adjustable in operational rate, series, and timing, and are movable in configuration and/or proximity providing a new type of adaptable, re-configurable and adjustable multi-zone, integrated ecological biofilm water treatment system.

A deinking method comprising the steps of liberating ink from waste paper as a raw material and removing the liberated ink from a flotation system, wherein a nonionic surfactant, e.g., a reaction product obtained by adding an alkylene oxide to a mixture of an oil & fat and an alcohol, an alkylene oxide adduct of a fatty acid, or an alkylene oxide adduct of a higher alcohol, is used for the liberation of ink, and the flotation step is effected in the presence of a cationic compound, an amine, an acid salt of an amine or an amphoteric compound at a pH of from 4 to 9, provides a high quality deinked pulp having a high whiteness and a little residual ink spots.

A plastic molded, sit-on-top kayak of unique size and shape is disclosed with various components which provide multi-purpose usage. the kayak is especially useful for multi-purposes such as sailing kayak surfing, scuba diving, paddling, touring and electric motorized usage. The kayak has attachment points integrally molded that provide for these multi-purposes. An important component of the invention includes a removable backrest that additionally provides secure waterproof storage of the operator's personal items. The backrest can be easily removed and reattached securely in place when desired. The ability to easily remove a backrest or backpack option also enables a desirable compact capability for transportation and storage by a user. Additional benefits of this feature provide for a smaller profile for packaging and commercial transportation. The kayak as disclosed may be formed for the most part, typically by blow molding, rotational molding, injection molding, rim molding, fiberglass and thermoforming, and by using a wide variety of polymer materials that may be suitable.

The invention relates to a beneficiation method for copper sulfide ore containing easily-sliming gangue minerals. According to the method, lime is adopted as pH regulator and pyrite depressant of flotation pulp of the copper sulfide ore containing the easily-sliming gangue minerals; sodium sulfide serves as activator of a small number of copper oxide minerals in the ore; sodium hexametaphosphate, sodium silicate or ethylenediamine serves as gangue slurry dispersant; a combination of butyl xanthate and other collectors serves as a collector of copper sulfide minerals; terpernic oil serves as foaming agent. The ore is subjected to primary grinding, primary roughing, primary scavenging and three-time concentration; the ore pulp is subjected to strong stirring and pulp mixing before starting to be subjected to primary roughing, primary scavenging and primary concentration, so that copper contained in the ore is efficiently recovered. According to the method, through reasonable combination and addition of chemicals, the ore grinding and pulp mixing process is strengthened, the adverse influence of gangue slurry on copper sulfide mineral floatation is eliminated, the surface characteristics of copper sulfide minerals are improved, the preferential adsorption of the collector on the surfaces of the copper sulfide minerals is enhanced, and accordingly, compared with a conventional method, the copper grade and the copper recovery rate of copper concentrate are substantially increased.

A composition for delivering edible salts into food products via microcapsules having a protein-polysaccharide shell matrix and an edible salt-containing active material. A method of treating osteoporosis is also disclosed.

The invention provides an anti-settling protection device, and relates to the technical field of automobile security devices. The anti-settling protection device comprises an air storage tank and a plurality of air bags, wherein the air bags are arranged at the chassis, top and two sides of the automobile, and all communicate with the air storage tank via air-guide tubes; an inflation control valve is arranged on each air-guide tube, and electrically connected with an automobile controller; and a water detection element is arranged on the automobile chassis, and electrically connected with the automobile controller. The invention also discloses an automobile comprising an automobile body and an anti-settling protection device installed on the automobile body. By installing the settling protection device on the automobile body, the inflation device can be started before the automobile falls into water or after the automobile falls, so that the air storage tank can inflate each air bag, the automobile can be lifted up or reduced in settling speed under the effect of buoyancy of water, and thus life security of personnel in the automobile is ensured.

The invention belongs to the technical field of marine lift-saving equipment, and particularly relates to a marine safety rescue airbag. According to the technical scheme, the marine safety rescue airbag comprises a ship, a high-pressure gas tank, a pipeline, movable connectors, switches, airbag storage tanks, two airbag bodies, movable ship connectors, safety tanks and a plurality of fixed safety bayonets; the high-pressure gas tank is arranged in the ship body and is connected with the airbag bodies through the pipeline, the airbag bodies are arranged in bilateral symmetry and are arranged at positions of a waterline of the ship, the airbag storage tanks are arranged at the position of the waterline of the ship, the airbag bodies are connected with the ship through the movable connectors, the switches and the movable ship connectors are arranged on the pipeline, each safety tank is arranged in the center of the corresponding airbag body, and the fixed safety bayonets are arranged on the side face of each airbag body. The marine safety rescue airbag has the advantages that the ship can keep balance in danger, the airbag can be conveniently separated from the ship when the ship is submerged, and personnel can escape through the safety tanks and the fixed safety bayonets on the airbag bodies or wait for rescue.

The invention discloses a robot to clear underwater hull attachments and belongs to the technical field of vessel washing. The robot comprises a frame, the frame is rectangular, the lateral side of athruster that is provided with blades which are hollow, a partition is arranged in each blade, support strips evenly distributed are connected between upper and lower surfaces of each partition and the inner wall of the inside of the corresponding blade, four cleaners are distributed evenly at the bottom of the frame, a battery is arranged in the middle of the surface of the frame, a control panelis connected to the surface of the battery, the surface of the battery is also connected with a solar receiving board through a telescopic rod, each side of the frame of the frame is provided with acamera and a probe lamp, and one face of the frame is also connected with an attracting device. The robot of the invention can clear hull attachments and wipe off coating, has good stability in water,and has great underwater operating capacity and long battery life.

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.

The invention discloses a self-balancing wave-resistant ship, including a ship body in which a plurality of self-balancing devices are arranged, wherein the self-balancing device includes a float bowl arranged outside the ship body and immersed into the sea level for providing buoyancy support for the ship body; an oil cylinder, arranged in the ship body; a piston rod with a hollow interior part, one end of the piston rod being arranged in the oil cylinder and capable of moving axially while the other end being fixedly connected with the float bowl; a spring, arranged in the oil cylinder the piston rod, for providing pull force and push force for the piston rod; oil paths are also arranged in the ship body, the self-balancing devices communicate with one another by the oil paths; the oil paths, the oil cylinder and the piston rod are filled with hydraulic oil, and the hydraulic oil communicates and exchanges by the oil paths, thus ensuring that the hydraulic pressures at all parts are always the same. The self-balancing wave-resistant ship achieves the effect that the ship body is still stable when driving in storm, and is strong in wave-resistant stability, and good in shake prevention effect.

The invention relates to a built-in anti-floating anchor blocking structure used in a foundation mat for a deep-well dewatering well. A steel sleeve is arranged on a rainfall wellhead. The bottom of a rainfall well forms a body expansion soil end through expansion holes. A bag type anti-floating anchor rod is arranged in the well. An expansion end plate is arranged in an anchor rod bag. Annular positioning rebars are arranged on the bag type anti-floating anchor rod. The anchor rod bag forms a grouting body expansion anti-floating end through high-pressure pouring after being inserted into the body expansion soil. The upper end of the anchor rod is anchored after penetrating a blocking steel plate. Connection rebars are connected to the top face of the blocking steel plate in a welding manner. The bottom face of the blocking steel plate is provided with a waterproof rubber gasket. The blocking steel plate is connected with a steel sleeve connection steel plate through bolts. The top face of the blocking steel plate sequentially comprises a waterproof concrete layer and a post-poured concrete sealing body. According to the deep-well dewatering well built-in anti-floating anchor blocking structure, by means of the built-in anti-floating anchor rod manner, the wellhead blocking quality can be guaranteed while the situation that the rainwater wellhead is destroyed due to the fact that underground water comes up to the top during the later period is reduced, and the built-in anti-floating anchor blocking structure has better economic and technical benefits.