140results about How to "Efficient pumping" patented technology

A molten metal pump including a pump base with an inlet and outlet, a mixing impeller chamber for mixing gas and molten metal, a pumping impeller chamber for pumping molten metal. First and second impeller members supported by a shaft are adapted to rotate in mixing and pumping chambers respectively. The impeller members may be integrally formed of a single impeller or separate impellers on one or more shafts. A gas passageway extends from a gas source to the mixing chamber in the base. A gas dispersement pump includes a base with an impeller chamber and inlet and an outlet. An impeller is mounted to a shaft and adapted to be rotated in the impeller chamber. A gas passageway extends from a gas source to a gas outlet proximate to the impeller chamber. A gas dispersement member of porous refractory material is adapted to disperse gas from the gas passageway. In a gas dispersement and gas / molten metal mixing pump, the dispersement member disperses the gas stream entering the mixing chamber where the gas is mixed with molten metal. Molten metal is pumped in the pumping chamber. A gas / molten metal mixture is discharged from the mixing chamber and molten metal is discharged from the pumping chamber.

The invention discloses a method for extracting coal seam gas by underground heat injection, which relates to a method for extracting gas. The method solves the problems that the conventional exploitation method needs to drill holes from the ground so as to bring great difficulty to construction and cannot be implemented in special regions. The method is characterized by comprising the following steps of: constructing mutually spaced heat injection boreholes and extraction boreholes to a coal seam from a mining area tunnel or a working face tunnel under a coal mine, injecting high-temperature steam or superheated water of 80 to 300 DEG C to the coal seam from the heat injection boreholes to heat the coal seam, displacing gas by using the steam and the water to the extraction boreholes, and discharging the gas to an underground gas drainage pipeline after the gas and the water are separated. The invention provides the convenient method for effectively extracting the coal seam gas for the low-permeability coal seam.

A direct expansion refrigerant-based heating and cooling system which includes a refrigerant pumping devise calibrated to ease or eliminate the pumping requirements placed upon the system's compressor unit when one or both of significant system height differentials between the compressor unit and the condensing unit are present and significant system refrigerant fluid transport line distances are present, or are desirable, such as in a deep well direct expansion system application.

The invention describes a method of single-transverse-mode generation for waveguide lasers of various kinds having a large cross section of their active core and thus providing a possibility of efficient pump of the active core region. This results in a laser beam with enhanced power and high spatial quality for high efficiency coupling to standard single-mode optical fiber networks. It is found that a multimode waveguide having a central dip of special shape in the refractive index profile of its core is able to guide a higher order mode with sharp central peak of its field carrying the considerable part on the mode energy and whose width is well compatible with the width of the fundamental mode of standard single-mode fibers. The useful properties of this higher order mode can be employed to provide the single-transverse-mode regime of generation in optical fiber lasers, integrated optical micro-lasers and various semiconductor laser sources.

A clock control circuit is provided. The clock control circuit includes a voltage supplier for supplying a first voltage in response to a first clock signal, a voltage booster for boosting the first voltage in response to the first clock signal input to the voltage booster, and a clock generator for generating a second clock signal having a voltage level equal to the boosted first voltage in response to the first clock signal.

The present invention relates to a method of slickwater hydraulic fracturing of a subterranean formation comprising introducing into a wellbore an aqueous fracturing fluid comprising a nonionic polymer and polyethylene oxide.

Power conversion device including: a first fluid conduit; a diffuser attached thereto with at least one vane supporting a diffuser hub; a rotor supported by the diffuser hub and having a rotor blade, hub, and shroud at the periphery thereof with at least one magnet thereon; a housing surrounding the shroud and attached to the diffuser, and having a stator including laminations forming poles and at least one coil therearound, the stator encapsulated in a non-metallic compound to prevent fluid contact with laminations and coil(s); a commutation control connected to the coil(s) and having external leads; and a second fluid conduit attached to the housing so fluid flow causes a torque load on the blades, rotating the rotor and inducing a magnetic field in the poles to generate current in the coil, converting hydraulic power to electric power. The device operates as a turbine / generator and as a motor / pump.

A reciprocating pump for pumping a fluid, especially for pumping a fluid such as UV ink which is subject to solidification when exposed to frictional forces. The pump has an internal displacement chamber with an inlet, and outlet, and a plunger which is reciprocally movable in the chamber. The plunger reciprocates through an axial passage in the housing at one end of the chamber, the passage being sized to receive the plunger with a clearance fit. First and second seals are positioned in the axial passage. Each seal is annular in shape and extends between the plunger and housing in sealing contact therewith. The pump housing is free from a bearing which contacts the plunger or guides its motion, such that the sealing contacts between the plunger and seals are the only contacts of the plunger in the housing.

A downhole assembly for deliquifying a wellbore. In an embodiment, the assembly comprises a nozzle section including a converging nozzle and a diverging nozzle in fluid communication with the converging nozzle. In addition, the assembly comprises a throat section including a convergent throat passage proximal the diverging nozzle and a cylindrical throat passage distal the diverging nozzle and extending axially from the convergent throat passage. The convergent throat passage and the cylindrical throat passage are in fluid communication with the diverging nozzle. Further, the assembly comprises a diffuser section coaxially aligned with the throat section. The diffuser section includes a divergent diffuser passage extending axially from the straight throat passage.

An air driven diaphragm pump includes an performance control actuator having a housing with opposed air chambers. The pump includes pump chambers facing the air chambers and pump diaphragms extending between each air chamber and each pump chamber, respectively. The actuator further includes an air valve, an intake to the air valve and an engagement. The intake includes an intake passage and a performance control intake adjuster rotatably mounted. The intake adjuster has a helical channel and a closure element extending adjustably into the intake passage. The engagement engages the helical channel for control of the intake. The helical channel has varied pitch to provide a nonlinear relationship between rotation and axial advancement of the intake adjuster. The nonlinear relationship gives flow rate proportional to the angular rotation of the intake adjuster. The end points of the channel provide a practical minimum pump performance of about 40% of maximum pump flow rate and a maximum pump performance of about 97% of maximum pump flow rate.

A pump mixes gas and molten metal and pumps molten metal. A base of the pump includes an inlet and an outlet, a mixing impeller chamber adapted to mix gas and molten metal and a pumping impeller chamber adapted to pump molten metal. First and second impeller members supported by a shaft are adapted to rotate in the mixing and pumping chambers, respectively. The impeller members may be integrally formed components of a single impeller or separate impellers supported on one or more shafts. A gas passageway extends from a gas source in proximity to the mixing chamber in the base. A gas dispersement pump for molten metal includes a base including an impeller chamber, an inlet and an outlet. An impeller is mounted to a shaft and adapted to be rotated in the impeller chamber. A gas passageway extends from a gas source to a gas outlet in proximity to the impeller chamber. A gas dispersement member composed of porous refractory material is adapted to disperse gas supplied from the gas passageway. In a gas dispersement and gas / molten metal mixing pump, the gas dispersement member disperses the gas stream, which enters the mixing chamber where the gas is further mixed with the molten metal. Molten metal is also pumped by rotation of an impeller in the pumping chamber. A stream of a gas and molten metal mixture is discharged from the lower mixing chamber while a stream of molten metal is discharged from the pumping chamber.

The present invention relates to thermally driven pumps. More specifically, one embodiment of the present invention relates to the use of a thermoelectric material to create a thermally driven, bi-directional pump, such as a micro pump, with no moving parts using the thermal transpiration effect (a Knudsen pump). One embodiment of the thermally driven pump of the present invention utilizes a thermoelectric material to assist with the thermal transpiration process resulting in a substantially symmetrical, bidirectional pump. A thermoelectric module is used to induce a temperature gradient across a nanoporous article having at least one nanochannel thus creating fluid flow via thermal transpiration across the nanochannel. The use of the thermoelectric module eliminates the need for a heat sink thereby making the pump substantially symmetrical and enabling bidirectional flow which is accomplished by reversing the polarity of the power supply to the thermoelectric module resulting in reversing the direction of heat transfer.A second embodiment of the thermally driven pump of the present invention comprises a uni-directional, pneumatic, micro fluidic, Knudsen pump which can be integrated into a lab-on-chip device and is configured to pump liquids. The Knudsen pump of the second embodiment is generally comprised of a channel system comprised of a nanochannel and a shallow channel embedded in a bottom substrate and capable of alignment in series with other channels within a lab-on-chip substrate. The nanochannel and shallow channel are both covered by a second substrate comprised of material conducive to finalize creation of the Knudsen channels. A heater is also included within the nanochannel to induce gas flow by thermal transpiration which pneumatically moves liquid through the channels of a lab-on-chip.

The invention relates to an auxiliary device for a drilling hole for gas drainage, in particular to a device for pumping and draining water from a downward hole of a coal bed, which solves the problems that the accumulated water in the downward hole of the coal bed cannot be drained out in time to influence the effect on gas drainage. The device comprises a liquid draining and pumping pipe, a drilling hole sealing device, and a drainage device provided with a first gate valve and a second gate valve, wherein the upper part of the drainage device is provided with a water inlet and a ventilation bolt of the drainage device, while the lower part is provided with a drainage bolt; the upper end of the drilling hole sealing device is connected with a hole connecting device; the upper end of the liquid draining and pumping pipe is extended in the hole connecting device, and a liquid guiding pipe is connected between the liquid draining and pumping pipe and the water inlet of the drainage device; and one side of the hole connecting device is provided with a first embedded wire pipe, and the second gate valve of the drainage device is connected with a second embedded wire pipe communicated with a gas drainage pipeline. The device can quickly and effectively drain out the accumulated water in the drilling hole to ensure the normal drainage and pumping of the drilling hole, improve the draining and pumping effect of the downward hole (or the drilling hole of a lower adjacent layer) of the coal bed, and reduce the gas content of the coal bed (or the lower adjacent layer) on a working surface; besides, the device has a simple structure and convenient connection and operation.

An elongate hollow structure and method of constructing the hollow structure is described, the hollow structure including a radially inner portion and a radially outer portion merging together to form a tubular wall structure. The method includes providing the radially inner portion, assembling the radially outer portion about the radially inner portion, and radially expanding the inner portion. The outer portion comprises an outer layer of fibre reinforced composite construction surrounded by a flexible outer casing. A space is provided between the radially inner portion and flexible outer casing. The outer layer includes reinforcement and a binder. The flexible outer casing resists radial expansion of the reinforcement, subjecting it to radial compression. The radially expanding inner portion cooperates with the flexible outer casing to cause the volume of the space to progressively decrease, causing the binder to spread through the space between the radially inner portion and flexible outer casing.

A kinetic pump and method of pumping a liquid comprising providing an acceleration tube for the acceleration of a liquid contained therein by an introduced high-pressure vapor or gas, receiving the liquid from the acceleration tube with a compressed-air surge tank, admitting the liquid from the acceleration tube into the compressed-air surge tank via a check valve, draining the liquid from the compressed-air surge tank from an outlet, and adding additional liquid to the acceleration tube via an inlet, wherein during each first half cycle of the method, the vapor or gas forces the liquid to accelerate in the acceleration tube, whereby a portion of the liquid is forced into the compressed-air surge tank, and wherein during each second half cycle of the pump, the vapor or gas is substantially removed from the acceleration tube and the liquid flows back to its original location and the additional liquid is added to the liquid.

A pump for efficiently producing gas in wells having some liquids. The pump may be driven by a walking beam or horsehead pump. The pump of the invention produces gases and liquids separately. Gases may be produced up the annulus between the casing and hollow sucker rods. A plunger seals the opening in the cage during downstroke. Gases and liquids are trapped in the cage above an inner barrel. Liquids are forced up the hollow sucker rod where they are retained by a one-way valve. On the upstroke, the one-way valve seats and gases are forced out of the cage and up the annulus. Gases are, therefore, produced up the annulus and liquids are produced up the drill string. In another embodiment, liquids are retained in a trap and are produced up hollow sucker rods, while gases are produced up the annulus between the hollow sucker rods and the casing.

Lubricant oil feeding means 2 of a die casting machine 1 comprises a lubricant oil feed passage 19 for feeding a lubricant oil into a clearance between the inner peripheral surface of a sleeve 7 and the outer peripheral surface of an injection piston 9, a lubricant oil feed valve 20 for opening or closing the lubricant oil feed passage, an air feed passage 16 for feeding air into a clearance between the inner peripheral surface of the sleeve and the outer peripheral surface of the injection piston, and an air feed valve 18 for opening and closing the air feed passage, and an arrangement is such that the lubricant oil feed valve is initially opened to feed the lubricant oil into the clearance between the sleeve and the injection piston and the air feed valve is then opened to pump the lubricant oil by the air. It is possible to spread the lubricant oil extensively and quickly, and accordingly, the useful life of the sleeve and the injection piston can be improved with a reduced quantity of lubricant oil. The generation of gas as a result of a reaction with molten metal within the sleeve can also be suppressed, thus allowing the occurrence of a casting cavity to be prevented and the quality of a product to be improved.

The present invention relates to a reciprocating piston pump comprising: at least one cylinder with an inlet for a pressure medium; a piston slidable in the cylinder between a first and a second position, and forming a pressure chamber in the cylinder; a first valve member which is received in the piston and which in an open position mutually connects the cylinder spaces on either side of the piston; a second valve member which is received in the piston and which in an open position connects a pressure medium passage formed in the piston to an outlet of the pump; a resilient member urging the piston in the first position; an actuating member connected to the valve members and which are embodied such that in the first position the first valve member is closed and the second valve member is opened and in the second position the first valve member is opened and the second valve member is closed, wherein the piston is moved to the second position by the pressure medium.

An ultrasonically driven pump, which may be used for sampling body fluids or atomizing liquids, has a stationary outer needle and an inner needle mounted within the bore of the outer needle. The distal end of the inner needle is positioned adjacent to the distal end of the outer needle. The inner needle is ultrasonically vibrated by an ultrasonic actuator without vibrating the outer needle, with resulting draw of liquid through the distal end of the outer needle into the bore of the inner needle for discharge through the proximal end of the inner needle. The outer needle can be formed to have a penetrating tip suited for penetrating the skin of a subject to allow sampling of body fluids including interstitial fluids. The pump can also be used for atomizing liquid, by drawing liquid from a supply that is pumped from the distal end to an open proximal end of the inner needle where the liquid is discharged by atomization into the atmosphere.

Power conversion device including: a first fluid conduit; a diffuser attached thereto with at least one vane supporting a diffuser hub; a rotor supported by the diffuser hub and having a rotor blade, hub, and shroud at the periphery thereof with at least one magnet thereon; a housing surrounding the shroud and attached to the diffuser, and having a stator including laminations forming poles and at least one coil therearound, the stator encapsulated in a non-metallic compound to prevent fluid contact with laminations and coil(s); a commutation control connected to the coil(s) and having external leads; and a second fluid conduit attached to the housing so fluid flow causes a torque load on the blades, rotating the rotor and inducing a magnetic field in the poles to generate current in the coil, converting hydraulic power to electric power. The device operates as a turbine / generator and as a motor / pump.

The present invention provides a rainwater catchment apparatus that is easily installed without renovating a building. The rainwater catchment apparatus comprises a rainwater inlet for introducing rainwater, a flange portion engaged with a peripheral portion of a rainwater outlet serving as a leading end of a drainage canal formed in a building framework for introducing rainwater in the rainwater inlet, a drain portion for discharging excessive water exceeding a predetermined level to the drainage canal, a reservoir freely fitted into the drainage canal through the rainwater outlet, and a pumping mechanism for pumping water stored in the reservoir to the outside.

New combinations of semiconductor devices in conjunction with optically active materials are set forth herein. In particular, light emitting semiconductors fashioned as diodes from indium gallium nitride construction are combined with high-performance optically active Langasite La3Ga5SiO14 crystalline materials. When Langasite is properly doped, it will respond to the light output emissions of the diode by absorbing high energy photons therefrom and reemitting light of longer wavelengths. High-energy short wavelength light mixes with the longer wavelengths light to produce a broad spectrum which may be perceived by human observers as white light. Langasite, a relatively new material, enjoying great utility in frequency control and stabilization schemes has heretofore never been used in combination with optical emission systems.

The invention concerns a gallery mode microdisc system for an electrically pumped optical source, the microdisc (1) being formed on one face of a substrate (2), the lower part of the microdisc being provided with an electrical contact referred to as the lower contact (4), the upper part of the microdisc being provided with an electrical contact referred to as the upper contact (6), the upper part of the microdisc being covered with a protective layer (3) of electrically insulating material, the central part (5) of the microdisc being electrically neutralized in order to prevent the passage of an electric current in said central part.

A pump for efficiently producing gas in wells having some liquids. The pump may be driven by a walking beam or horsehead pump. The pump of the invention produces gases and liquids separately. Gases may be produced up the annulus between the casing and hollow sucker rods. A plunger seals the opening in the cage during downstroke. Gases and liquids are trapped in the cage above an inner barrel. Liquids are forced up the hollow sucker rod where they are retained by a one-way valve. On the upstroke, the one-way valve seats and gases are forced out of the cage and up the annulus. Gases are, therefore, produced up the annulus and liquids are produced up the drill string. In another embodiment, liquids are retained in a trap and are produced up hollow sucker rods, while gases are produced up the annulus between the hollow sucker rods and the casing.

A device and method of tailoring a pump lift capacity of a pump for an electrical submersible pumping unit (ESP). The pump unit of the ESP has a plurality of stages, each made up of an impeller and a diffuser. The ESP has a pump lift capacity, which is ideally matched with well capacity. The well capacity is, therefore, the target lift capacity. To facilitate matching of pump lift capacity and well capacity, one or more stages of the pump unit may be replaced with a spacer assembly to reduce pump lift capacity by a desired amount. The spacer assembly may include a shaft bearing support made up of an outer ring and an inner ring, wherein the outer and inner ring are connected by webs, which allow oil to flow through the support. The spacer assembly may be axially located on the pump shaft via compression tubes.

A procedure and machine promotes healing by causing muscle fasciculation and contraction relaxation cycles that effectively pump blood through the microcirculation, draining the venous beds and raising the tissue oxygen levels. A high phase charged system is electronically pulsed and adjusted to induce deep-layered muscle contractions, causing greatly increased flow rates of both blood and lymphatics, patency of vessels permitting, and forcing blood into the microcirculation of the treated tissue. The machine electrical waveform stimulates angiogenesis, facilitating new tissue growth and repair in the healing process and raises the metabolic rate in the treated tissues.

The invention relates to a vacuum sewage system, which includes a sanitary unit, such as a toilet unit, vacuum sewer piping (200) connected to the sanitary unit, a discharge valve between the sanitary unit and the vacuum sewer piping, and a vacuum generating device for generating vacuum in the vacuum sewer piping. The system comprises an on-line separator device (1) in the vacuum sewer piping (200, 201) and a first pump means (2) and a second pump means (3) connected in parallel with the on-line separator device (1). The first pump means (2) is a vacuum pump for generating vacuum in the vacuum sewer piping (200, 201) and for evacuating air from the sewage flow flowing into the on-line separator device (1) and the second pump means (3) is arranged for pumping mainly sewage from the sewage flow flowing into the on-line separator device (1).