Abstract: A multifunctional air pump is disclosed including an air pump assembly, a control module, and a remote user input for inflating and deflating an inflatable product. The air pump may be operated remotely for convenience. The air pump may also operate automatically to maintain the pressure of the inflatable product.

Abstract: The purpose of the present invention is to provide a pump device that has a function to separate foreign matter from a working fluid in which foreign matter is mixed and that is capable of supporting a large working fluid flow rate. The present invention includes a first pump that is provided above a working fluid reservoir, and a second pump that has a rotary shaft that is concentric with a rotary shaft of the first pump and that is provided further down than an inlet of the first pump. A centrifuge filtration device having functionality to separate foreign matter from the working fluid is provided in an area below the inlet of the first pump and above the second pump, and the centrifuge filtration device is disposed so that the inner diameter on the second pump side is large and the inner diameter on the first pump side is small.

Abstract: A soundproof cover of a compressor for an air conditioner includes a sound-insulating material body portion (11) that is a rubber or thermoplastic-elastomer molded product with sound-insulating properties having a shape corresponding to an outer shape of a compressor body portion including a compressor leg portion positioned on a lower end side, having a folded portion (12) extending along a height direction of the compressor body portion and covering the compressor body portion by being folded through the folded portion (12), a sound-insulating material head portion (21) that is a rubber or thermoplastic-elastomer molded product with sound-insulating properties having a shape corresponding to an outer shape of a compressor head portion positioned on an upper end side of the compressor body portion and a sound absorbing material provided at least inside the sound-insulating material body portion (11).

Abstract: The vacuum electro-spray ion source comprises a hollow capillary, a vacuum cavity, a gas inlet pipe, a gas supply device and an adjusting device, wherein a first end of the hollow capillary is a sampling port, and a second end is used as a spray nozzle for vacuum electro-sprays and stretches into the vacuum cavity; the air pressure in the vacuum cavity is ranged from 10 to 200 Pa; one end of the gas inlet pipe stretches into the vacuum cavity, and the other end is connected with the gas supply device; and the adjusting device is configured for adjusting the gas inlet pipe to allow the gas to flow therein intermittently. The ion source may achieve electro-spray ionization in the vacuum environment, so that losses during ion transmission may be reduced to improve the signal intensity and detection limit during detection.

Abstract: Provided is a molten metal holding furnace with heat dissipation and insulating properties. An insertion hole 20 of a molten metal holding furnace 10 has an inside cylindrical portion (tapered surface) 21 and an outside cylindrical portion 22 (cylindrical surface). A heating tube 30 has a distal cylindrical portion 35 corresponding to the inside cylindrical portion 21 and a proximal cylindrical portion 36 corresponding to the outside cylindrical portion 22. The heating tube 30 is inserted and positioned in the insertion hole with the distal cylindrical portion 35 positioned at the inner cylindrical portion 21 and the proximal cylindrical portion 36 positioned at the outside cylindrical portion 22. A filling material 60 is filled between the heating tube 30 and the insertion hole 20.

Abstract: According to the invention, there is provided a boat which comprises, a surface on which a plurality of electronic components can be supported, the surface having a plurality holes defined therein through which a vacuum can be passed to hold components on the surface; and a first vacuum inlet which is in fluid communication with the plurality of holes, wherein the first vacuum inlet can be fluidly connected to a first vacuum generating means so that the first vacuum generating means can provide a vacuum at the plurality of holes; a second vacuum inlet which is in fluid communication with the same plurality of holes with which the first vacuum inlet is in fluid communication with, wherein the second vacuum inlet can be fluidly connected to a second vacuum generating means so that the second vacuum generating means can provide a vacuum at the plurality of holes.

Abstract: An apparatus and methods for testing and pumping through a well servicing system are provided. The apparatus includes a drive mechanism and an actuation system. The actuation system is coupled to the drive mechanism for selectively engaging the drive mechanism to a drive train of the well servicing system's pumping equipment for pressure testing and low rate pumping of the well servicing system without using the primary mover of the pumping equipment. A method for hydrostatic pressure testing of the well servicing system includes putting a transmission of the drive train into neutral and containing the well servicing system, then engaging the drive mechanism to the drive train and activating the drive mechanism to drive the drive train for pumping and compressing test fluid into the well servicing system without using the primary mover.

Abstract: A vacuum pump with abatement function is used for evacuating a chamber of a manufacturing apparatus. The vacuum pump with abatement function includes a vacuum pump having a discharge port to which at least one abatement part for treating an exhaust gas discharged from the vacuum pump to make the exhaust gas harmless is attached. The abatement part is selected from a plurality of abatement parts having different treatment types of exhaust gas and/or different treatment amounts of exhaust gas and/or different treatment performances of exhaust gas.

Abstract: A screw spindle pump constituted by at least two parts is disclosed. The first part includes a housing and at least one spindle system disposed in the housing and capable of being driven in a rotational manner. Furthermore, a pressure region disposed downstream of the spindle system and at least one outlet opening which is connected to the pressure region, the outlet opening discharging the delivery medium out of the pressure region. The second part includes at least one low-pressure chamber disposed upstream of the spindle system and at least one inlet opening for the delivery medium into the low-pressure chamber. The first part and the second part are coupled together, preferably in a rotational manner, so that they can assume at least two different relative positions.

Abstract: A fuel pumping unit has a low pressure pump, a high pressure pump, and a drive input which drives the low and high pressure pumps. The low pressure pump supplies, in use, fuel at a boosted pressure to the high pressure pump. The fuel pumping unit further has a low pressure housing containing the low pressure pump, and a high pressure housing containing the high pressure pump. The housings are joined together at a housing interface. The drive input is contained in one of the housings, whereby drive from the drive input is transferred across the interface to the pump in the other housing. The housing interface includes a gap which interposes between the high pressure pump and the low pressure pump. A layer of substantially stagnant fuel is trapped, in use, in the gap to reduce heat transfer from the high pressure pump to the low pressure pump.

Abstract: A fan has a fan housing (2) which is formed with a pot-shaped recess (4) and it has an external-rotor drive motor (103) having an internal stator (22) and an external rotor (34), separated from each other by an air gap (52). The internal stator (22) is mounted on a bearing support tube (24) which is connected to a base part (46). The arrangement of bearing support tube (24) and base part (46) form, together with the pot-shaped recess portion (4) of fan housing (2), a substantially fluid-tight annular space (54) enclosing the inner stator (22). A wall (56) defining this annular space (54) extends in the manner of a canned motor through the air gap (52) between inner stator (22) and external rotor (34).

Abstract: Some systems and methods for operating a vessel occlusion catheter may include a control and inflation device to control the filling of the balloon in such a manner that the vessel wall will not be overstressed while the safe occlusion of the blood vessel is achieved.

Abstract: Various methods and systems are provided for determining a surge level of a compressor. In one embodiment, a method for an engine comprises updating a stored estimate of a surge level of a compressor responsive to detection of a surge event.

Abstract: A priming valve for priming a centrifugal pump includes a valve assembly separating an inlet chamber from an outlet chamber. The inlet chamber is fluidly coupled to an intake for the centrifugal pump and the outlet chamber is fluidly coupled to a priming pump. A control valve is provided to operate the valve assembly in order to fluidly connect the inlet chamber with the outlet chamber. While the valve assembly fluidly connects the inlet chamber with the outlet chamber, the priming pump can operate to replace air in the intake and the centrifugal pump with water.

Abstract: The invention relates to a twin screw pump of double-flow design with a pump housing, two bearing portions and at least one gear portion with at least one gear chamber, with feed screws with double-flow flanks arranged on two shafts, the feed screws on the shafts having a root diameter, the shafts being mounted in the bearing portions via bearings, a seal for sealing the bearing portion with respect to the conveying portion, with gearwheels arranged on the shafts in the gear portion, the shafts being rotatably coupled by means of said gearwheels, characterized in that on either side the inner diameter of the seal is greater than, or the same size as, the root diameter of the feed screws, and/or in that on either side the inner diameter of the bearing is greater than, or the same size as, the inner diameter of the seal.

Abstract: A liquid gas vaporization and measurement system, and associated method, for efficiently vaporizing a continuous sample of liquid gas, such as liquid natural gas (LNG), and accurately determining the constituent components of the gas. A constant flow of liquid gas sampled from a mass storage device is maintained in a vaporizing device. Within the vaporizing device the liquid gas is flash vaporized within heated narrow tubing. The liquid gas is converted to vapor very quickly as it enters one or more independently operating vaporizer stages within the vaporizing device. The vapor gas is provided to a measuring instrument such as a chromatograph and the individual constituent components and the BTU value of the gas are determined to an accuracy of within +/?0.5 mole percent and 1 BTU, respectively.

Abstract: A self-priming pump assembly is disclosed. In an illustrative embodiment, the self-priming pump assembly includes a motor, a main pump having a main pump impeller, a vacuum pump having a vacuum pump impeller, and a drive shaft driven by the motor. The main pump impeller and the vacuum pump impeller may be directly coupled to and driven by the drive shaft, and may rotate about the rotation axis of the drive shaft. In some instances, the vacuum pump impeller is situated between the motor and the main pump impeller, while in other instances, the main pump impeller may be situated between the vacuum pump impeller and the motor. In some cases, bearings may be provided at or near the vacuum pump to help support the vacuum pump relative to the drive shaft.

Abstract: According to the invention, an air compressor includes: one pair of air tanks arranged parallel to each other by being separated from each other in a constant interval, for storing thereinto compressed air; a compressing unit that compresses air sucked from an external space so as to supply the compressed air to the air tanks; and a motor coupled to the compressing unit so as to drive the compressing unit, while the motor and the compressing unit are arranged above the one pair of air tanks; wherein: a cooling fan that generates cooling wind is provided on one end of a rotation shaft of the motor; and a control circuit unit that drives the motor is arranged above the one pair of air tanks and at a position which is overlapped with an axial direction projection area of the cooling fan.

Abstract: Flood water removal systems including a motor, a vacuum generating device, a discharge pump, and a vacuum tank can be efficiently arranged to be transversely mounted to a vehicle. Certain flood water removal systems can include a supercharger driven by the engine to generate vacuum. The systems can include a valve to prevent collapse of a vacuum tank and maintain a predetermined vacuum pressure without varying the speed of the motor. The systems can also include a two-stage exhaust that blends exhaust from the blower with motor exhaust in a silencer to reduce noise generation for operation in residential or other noise-sensitive settings. The systems can also include a vacuum tank comprising a noise reduction baffle to further reduce noise generation.

Abstract: An apparatus is provided for compressing a loose solid feedstock. The apparatus includes a two stage compressor. The first compression stage is a screw compressor. The second compressor stage is a reciprocating compressor. The reciprocating compressor operates co-axially with, and receives its feed from, the screw compressor. A choke cone maintains pressure in the outfeed from the compressor stages. The reciprocating compressor, the screw compressor, and the choke cone are all adjustable in real time to control the compression of the feedstock according to a pre-programmed schedule that need not have equal compression and retraction strokes. The operation of the screw compressor may be advanced or eased off depending on the motion of the reciprocating compressor. The operation of the choke cone may be actively controlled to obtain a coordination with the compressor stages.

Abstract: A system for controlling a hydraulic pump for operating an engine cooling fan of a hybrid vehicle, which allows a hydraulic pump for driving an engine cooling fan of a hybrid vehicle to be driven by power provided from a transmission PTO of a hybrid vehicle while an engine is idling. Furthermore, the hydraulic pump to be driven may be driven by power supplied from an electric motor when the engine is stopped. As a result, an engine coolant temperature may be properly managed by operating the engine cooling fan of a hybrid vehicle even when the engine is stopped.

Abstract: An isothermal turbo-compressor-condenser-expander arrangement includes heat-transferring blades that are mounted on, or surround, individual conduits to promote air exchange and heat transfer. In operation, the open framework rotates in free air to promote heat exchange. The assembly includes a first plurality of spokes extending radially outwardly from a first central hub to an outer perimeter with first radial conduits that transport refrigerant under centrifugal force and compression from the hub to the outer perimeter. The first radial conduits include heat exchanging blades. A second plurality of spokes extend radially outwardly from a second central hub that each includes a second thermally-insulated conduit that transports refrigerant from the outer perimeter to the second central hub. Axial conduits extend axially at the outer perimeter. At least some of the axial conduits include an axial blade in thermal communication with the conduit that promotes heat exchange radially.

Abstract: A multiple stage pump for delivering fuel to an engine is disclosed which includes a pump housing, a boost stage operable at engine start to draw fuel into the pump housing at a boost stage pressure, a first pumping stage operable upon engine start for receiving fuel from the boost stage and delivering the fuel from the pump housing to a fuel metering unit, a second pumping stage operable upon engine start and during engine cruise operation for receiving fuel from the boost stage and delivering the fuel from the pump housing to said fuel metering unit, and a switching valve in fluid communication with the first and second pumping stages, and configured to control fuel flow through the first pumping stage in dependence on changes in boost stage conditions such as pressure or shaft speed.

Abstract: A pump assembly for circulating water in an evaporative cooler is provided. The pump assembly may include a housing which defines a cavity. The pump assembly may also include an impeller received in the cavity of the housing. Further, the pump assembly may include a rod which may be operatively associated with the impeller and extends out of the housing. Moreover, the pump assembly may include a connecting member which is operatively associated with the rod, and may be adapted to be operatively associated with a shaft of a fan assembly incorporated into the evaporative cooler. The connecting member may be adapted to transmit rotary motion of the shaft to the impeller, thereby enabling the pump assembly to circulate water in the evaporative cooler.

Abstract: The present invention relates to a vacuum evacuation apparatus which can be mounted in a posture that can freely be selected a vacuum evacuation apparatus for evacuating a container from an atmospheric pressure to a high vacuum or less includes a first vacuum pump for evacuating the container to a high vacuum or less, and a second vacuum pump for evacuating the container from an atmospheric pressure to a medium or low vacuum the first vacuum pump and the second vacuum pump are integrally connected to each other into an integral unit.

Abstract: A method for delivering a fluid using a centrifugal pump (11). Machines (1, 6) and/or apparatus (3, 8), which influence the pressure and/or the temperature of the fluid, are disposed upstream of the centrifugal pump (11). At the inlet to the centrifugal pump (11), the fluid is regulated to achieve a specific entry state. According to the invention, the entry state of the fluid is regulated by using the machines (1, 6) or apparatus (3, 8) such that, in the centrifugal pump (11), the fluid only takes on states in which the compressibility factor of the fluid has already reached or exceeded the minimum thereof.

Abstract: A cam plate for use with a pump includes at least one camming surface configured to enable an impeller to rotate in a first direction and substantially prevent the impeller from rotating in a second direction opposite the first direction. A ring recess is defined in the cam plate. The ring recess is configured to receive at least a portion of a cam ring that is configured to rotate within the ring recess. A follower recess is at least partially defined by the at least one camming surface and extends from the ring recess. The follower recess is configured to receive at least one cam follower therein.

Abstract: An air compressor is provided. The air compressor includes a compression mechanism including a cylinder to generate compressed air, a motor provided to drive the compression mechanism, an inverter board including an inverter to control a rotation of the motor, two elongated tanks provided to store the compressed air generated by the cylinder, and a fan rotated by the motor to supply cooling air. The tanks are arranged below the cylinder and the motor, and the inverter board is arranged between the cylinder and the tanks.

Abstract: This disclosure is to an apparatus and method for increasing the ability of centrifugal compressors or expanders to handle multiphase fluids with increased liquid content by passing the fluid through a slug suppressor and/or an atomizing device prior to compression or expansion.

Abstract: An arrangement for conveying fluids has a fluid pump (91) implemented in the manner of a centrifugal pump, having a pump wheel (90) that is connected to a first permanent magnet (92). The arrangement further has an electronically commutated internal-rotor motor (70) having a stator (68), inside which stator is rotatably arranged a rotor (60) that is in turn connected to a second permanent magnet (76; 140) that coacts with the first permanent magnet (92) in the manner of a magnetic coupling (93). The arrangement also has a partitioning can (52) that separates the first permanent magnet (92) of the magnetic coupling (93), which magnet is arranged inside said partitioning can (52), in fluid-tight fashion from the second permanent magnet (76; 140) arranged outside the partitioning can (52), the stator (68) of the internal-rotor motor (70) being arranged substantially in the same drive plane as the magnetic coupling (93) and radially outside the latter.

Abstract: In order to ventilate a centrifugal pump (1) having a centrifugal pump outlet space (6) and a centrifugal pump suction space (4), as well as having an additional ventilation pump (3), preferably configured as a vacuum pump, having a ventilation pump inlet (14) and a ventilation pump outlet (15), which pump has a particularly simple structure and which can automatically ventilate itself, if necessary, without any complicate switching processes, it is proposed that both the ventilation pump inlet (14) and the ventilation pump outlet (15) are connected with the centrifugal pump outlet space (6) by way of a connection line (16, 17), in each instance, forming a secondary line.

Abstract: The invention provides a jet propeller for air-charging, and an outboard motor having the same. In addition to the propelling function, the present invention can be coupled with special function nozzle device to use the same apparatus achieving the following functions: air-charging, air pumping, as a spray gun, high-pressure water spray (fire fighting or cleaning), and water pumping. The present invention does not use the ordinary propeller blade, which is not easy to harm the human being or marine creatures, or to be collided and wrapped by miscellaneous objects in the water, and provides a multi-purpose, safe and environment-friendly propeller.

Abstract: The present invention relates to a ship propulsion system (S) having a pump jet (P), which comprises a pump housing (G) and a drive motor, wherein a rotor (2) of an impeller of the pump jet (P) has a rotational axis (B) which is not aligned with a control axis (A) of the pump jet (P).

Abstract: An inflatable bed includes a bedstead assembly, a mattress assembly having at least one air chamber, and an electric air pump unit disposed on the bedstead assembly. The air pump unit includes a centrifugal pump device for performing initial inflation of the air chamber, a diaphragm pump device for performing subsequent inflation of the air chamber, and a control valve operable to allow for and interrupt fluid communication between the centrifugal pump device and the air chamber.

Abstract: A method of operating apparatus for controlling the pressure in a process chamber (10), the apparatus comprising a first pump unit (14) having an inlet in fluid connection with an outlet of said process chamber, and a second pump unit (16) having an inlet in fluid connection with an outlet of the first pump unit via a flow control unit (18) comprising a variable flow control device (20; 28) having variable conductance for controlling outlet fluid pressure at the outlet of the first pump unit, the method comprises controlling speed of the first pump unit to increase the range of chamber pressures over which control of the outlet fluid pressure produces changes in said chamber pressure without exceeding the thermal limit and/or motor stall limit of the first pump unit.

Abstract: In order to ventilate a centrifugal pump (1) having a centrifugal pump outlet space (6) and a centrifugal pump suction space (4), as well as having an additional ventilation pump (3), preferably configured as a vacuum pump, having a ventilation pump inlet (14) and a ventilation pump outlet (15), which pump has a particularly simple structure and which can automatically ventilate itself, if necessary, without any complicate switching processes, it is proposed that both the ventilation pump inlet (14) and the ventilation pump outlet (15) are connected with the centrifugal pump outlet space (6) by way of a connection line (16, 17), in each instance, forming a secondary line.

Abstract: The invention relates to a device for regulating the flow rate of fuel taken from a fuel circuit of an aircraft propelled by an engine. The device comprises: a positive displacement pump receiving fuel from a fuel circuit of the aircraft and delivering fuel at a flow rate that is proportional to its speed of rotation; a differential gear having a predefined transmission ratio, a first inlet mechanically coupled to the aircraft engine, a second inlet mechanically coupled to an electric motor/generator, and an outlet mechanically coupled to the positive displacement pump to drive it in rotation; and an electronic control system for regulating the speed of rotation of the electric motor/generator as a function of a setpoint value for the flow rate of fuel to be injected.

Abstract: A system for injecting a fluid into a formation including a fluid, and at least one injection pump configured to receive the fluid, the at least one pump including a centrifugal pump having at least two stages configured to increase the pressure of the received fluid is disclosed. The system further includes a drive device coupled to the injection pump. A method of injecting a fluid downhole including providing a fluid to an injection pump, the injection pump including a centrifugal pump having at least two stages, pumping the fluid through the at least two stages of the centrifugal pump, thereby increasing the pressure of the fluid, and injecting the fluid from the injection pump into a wellbore is also disclosed.

Abstract: The present invention is directed to an analyzer for measuring the vapor pressure of a hydrocarbon liquid. The analyzer includes a pressure measuring system connected to an air saturation system having a circulation chamber with opposing first and second ends. A first opening is disposed toward the first end and a second opening is disposed toward the second end. A plumbing system connects the first and second openings. A pump moves the hydrocarbon liquid through the plumbing system from the first opening to the second opening so as to saturate the hydrocarbon liquid with air. The air saturation system has a cooler for cooling the hydrocarbon liquid and the pressure measuring system has a heater for heating the hydrocarbon liquid. The pump may be a piston actuated pump or a motor-driven pump and the plumbing system may include an aeration chamber.

Abstract: An arrangement for conveying fluids has a fluid pump (91) implemented in the manner of a centrifugal pump, having a pump wheel (90) that is connected to a first permanent magnet (92). The arrangement further has an electronically commutated internal-rotor motor (70) having a stator (68), inside which stator is rotatably arranged a rotor (60) that is in turn connected to a second permanent magnet (76; 140) that coacts with the first permanent magnet (92) in the manner of a magnetic coupling (93). The arrangement also has a partitioning can (52) that separates the first permanent magnet (92) of the magnetic coupling (93), which magnet is arranged inside said partitioning can (52), in fluid-tight fashion from the second permanent magnet (76; 140) arranged outside the partitioning can (52), the stator (68) of the internal-rotor motor (70) being arranged substantially in the same drive plane as the magnetic coupling (93) and radially outside the latter.

Abstract: A compact turbomolecular vacuum pump (1) is driven by a cup-type motor (8). The cup-shaped rotor of the motor is preferably integrated into the pump rotor (14) and may define corresponding pumping stages, for instance Holweck stages, wherein the stators (11, 12) of said stages being preferably obtained by superimposing stator rings (11?, 12?).

Abstract: A disposable device for transfer of at least one predetermined medium into a device for treatment and promotion of healing of damaged body tissue. The device is comprised of a housing and a first pump stage disposed within the housing for pumping a first predetermined medium. A second pump stage engageable with such housing is included for pumping a second predetermined medium. Also included is a drive mechanism for driving the first and second pump stages. A coupling device engageable with the drive mechanism for connecting the drive mechanism to a power source is further included.

Abstract: A two-stage pump device features a main pump for pumping a fluid; and a priming pump coupled to the main pump via a length of flexible hose, the priming pump having a propeller for feeding the fluid to the main pump and priming the same in response to either manual actuation or a switching device. The propeller may be arranged in the flexible hose and driven by a flexible drive shaft that is coupled to the main motor. The priming pump remains operational to ensure air locks do not occur. The main pump is suitably adapted for mounting in an accessible location and the priming pump is suitably adapted for mounting in an inaccessible location. The switching device is either an automatic float/air switch or an in-built electronic control system.

Abstract: A scroll compressor includes: a frame fixedly installed in the casing to support a rotary shaft of the driving motor and having a second suction opening at its one side and a second discharge opening at its other side; a fixed scroll fixedly installed at the frame and having a first suction opening at its edgemost and a first discharge opening at its central portion; an orbiting scroll forming a first compression chamber by being engaged with the fixed scroll; a self-rotation preventing member interposed between the frame and the orbiting scroll for preventing a self-rotation of the orbiting scroll; and a vane making a linear movement in a radial direction of the frame according to an orbiting movement of the orbiting scroll, and forming between the frame and the orbiting scroll a second compression chamber including a spaces where the second suction and discharge opening exists.

Abstract: The invention relates to the use of variable speed control of the cooling fan on a variable speed oil-injected screw compressor. A screw compressor (11) comprises at least one stage of compression, each with a pair of rotors, variable speed compressor drive means (12), an oil reclaimer (13) from the compressed air and cooling apparatus (17) for cooling the oil extracted from the compressed air. The cooling apparatus comprises a heat exchange device and a fan (18) driven by a motor (19) which can be run at different speeds.

Abstract: A vacuum pump system includes at least one high-vacuum pump, a fore-vacuum pump, and at least one intermediate pump, arranged between the at least one high-vacuum pump and the fore-vacuum pump and having its inlet connected directly and exclusively with the outlet of the high-vacuum pump.

Abstract: An air compressor having a cooling fan that cools both a pump and an electric motor. Baffle compress air against the top of the motor, causing it to break up and flow around fours sides of the motor and through the motor. The pump includes an elongate intake tube or muffler that attenuates pump intake noise. A compressor tank for the air compressor includes a roll cage for protecting a condensate valve for the compressor tank. The compressor tank includes a rim base formed on the bottom of the compressor tank that permits the compressor tank to rest on a surface without additional supports or legs. Controls and gauges are mounted in the bottom clamshell piece, and openings on a top fit around the controls and gauges. The top and the bottom are aligned with guides so that the controls and gauges may be properly aligned with the openings.

Abstract: A cryogenic stream is pumped by a cryopump and then vaporized in a vaporizer to produce the pressurized vapor stream. The cryopump is driven by a transmission that is in turn driven by a hydraulic fluid. The hydraulic fluid flows within a hydraulic fluid circuit having first and second hydraulic fluid flow paths. The first of the flow paths is used to drive the hydraulic transmission. The second of the flow paths is dedicated to raising heat. Hydraulic fluid is circulated within the flow path by hydraulic fluid pumps and the amount of heat generated is controlled by adjustable back pressure valves. The adjustable back pressure valves in both fluid flow paths can be adjusted to control the degree to which heat is added to the vaporizer and therefore the pressurized vapor stream. The hydraulic fluid pumps can be driven by diesel engines. Heat may also be recovered from the diesel engines and gear oil used in pumps and the cryopump to also help vaporize the pressurized liquid stream.

Abstract: An aquarium includes a pump disposed in a chamber of a container to circulate water and having a spindle. An air supplying device is coupled to the spindle of the pump and driven by the spindle of the pump, to pump air into the water contained in the chamber of the container. The pump may thus be used to pump or circulate the water in the aquarium, and to simultaneously supply air into the water contained in the aquarium. The air supplying device includes a valve housing having two check valve members disposed in a recess and a depression, and a membrane attached to the valve housing and forced by the pump to actuate the check valve members.

Abstract: A rotary blower with forced external air cooling having multiple interconnected and synchronized parallel multi-lobe rotors with the same number of straight lobes for propelling flow from a suction port to a discharge port of an inner casing without internal compression. The blower also has an outer cover with cooling air inlet and outlet openings and added centrifugal cooling fans mounted on the rotor shafts adjacent to the cooling air inlet openings for circulating cooling air through the space between the outer cover and the inner casing. The blower further utilizes wearable strip seal devices applied on the rotors for preventing internal leakage and accidental mechanical contact.