Abstract: An aspirator may include an aspirator body comprising an outer wall and an inner wall, the inner wall defining a body channel. The aspirator may include an aspirator body including an outer wall and an inner wall, the inner wall defining a body channel. The aspirator body may include a plenum disposed between the outer wall and the inner wall. The aspirator body may include a plurality of apertures disposed between the outer wall and the inner wall and defined by a side wall and the plenum. The aspirator may include an aspirator barrel comprising a barrel outer wall and a barrel inner wall, the barrel inner wall defining an air channel. The air channel may be in fluid communication with the plenum.

Abstract: The present invention is directed toward a method for operating a vacuum generator using pressure fluid to generate the vacuum. The vacuum generator has a pressure port for pressure fluid supply, and a suction point. During a work cycle, the pressure fluid supply is activated at least once and then deactivated again at least once. An active period is measured during which the pressure fluid supply is activated during the work cycle.

Abstract: An ejector includes (i) a body part including a depressurizing space in which a refrigerant flowing out of a swirling space is depressurized, a suction passage that draws a refrigerant from an external, and a pressurizing space in which a jet refrigerant jetted from the depressurizing space and a suction refrigerant drawn from the suction passage are mixed with each other to be pressurized, (ii) a conical passage formation member which is arranged inside the body part, and (iii) a swirling promotion part. A nozzle passage is provided in the depressurizing space on an outer peripheral surface of the passage formation member, and a diffuser passage is provided in the pressurizing space on the outer peripheral surface of the passage formation member. The swirling promotion part includes a flow regulation plate that promotes a swirling flow of the refrigerant flowing in the diffuser passage.

Abstract: A device is provided for generating a vacuum for a vacuum cementing device, the device including a channel and a connector for a gas cartridge. The connector has an opener for opening the gas cartridge, and connects the gas cartridge to the channel in a pressure-tight manner, such that gas from the opened gas cartridge flows along the channel to the surroundings of the device. The channel includes at least one T-piece, provided as Venturi nozzle, having a vacuum connector for the vacuum cementing device, such that gas from the opened gas cartridge flowing through the channel generates a negative pressure at the vacuum connector. A method is also provided including steps of opening a gas cartridge, flowing gas from the gas cartridge through a Venturi nozzle, whereby by a negative pressure is generated, and applying the negative pressure to a vacuum cementing system.

Abstract: A manual/pneumatic pump structure includes: a barrel member having a barrel body defining a fuel collection space; a cover body disposed on the barrel body for sealing the fuel collection space; a pneumatic gas-sucking member having a main body disposed on the cover body and a Venturi tube section positioned in the main body, an inlet passage being formed in the main body in communication with an inlet of the Venturi tube section, an outlet passage being formed in the main body with a first end in communication with an outlet of the Venturi tube section, a second end of the outlet passage being permissible to communicate with the atmosphere; and an isolation section for isolating internal passage of the pneumatic gas-sucking member from the atmosphere. The isolation section has a movement space within which a stopper body is movable between a blocking position and an unblocking position.

Abstract: An ejector for a turbine engine is described herein. The ejector may include a variable geometry motive nozzle and a variable geometry mixing tube positioned downstream of the variable geometry motive nozzle.

Abstract: An ejector comprising a motive inlet, a motive nozzle separably secured to the motive inlet, a suction chamber about the motive nozzle, a suction fluid inlet to the suction chamber, a mixing tube in fluid communication with the suction chamber and the motive nozzle, a diffuser in fluid communication with the mixing tube and distal the suction chamber and the motive nozzle, and an outlet from the diffuser is provided. A nozzle comprising at least two concentric arc nozzle portions is also provided. An ejector comprising a mixing tube including a flexible layer adapted to compress or stretch, thereby allowing a mixing tube diameter to change is further provided.

Abstract: A method for conveying material by applying a pressure difference in a conveying conduit (4), in which method the material is fed into the conveying conduit (4) and in the conveying conduit further into a separating device (5), where the material being conveyed is separated from conveying air, in which method a negative pressure is created in the conveying conduit (4) by means of an ejector apparatus (6), whose suction side is connected to the separating device (5), said ejector apparatus being operated using an operating medium consisting of a liquid mist, especially an aqueous liquid mist, said medium being sprayed through at least one spraying nozzle (122) into an ejector tube (128) directed into a separating element (38). In the method, the generation of the negative pressure to be produced is intensified according to need by limiting the flow of gases, such as air, into the ejector tube (128) from the direction opposite to the spraying direction of its operating medium, i.e.

Abstract: A variable nozzle area jet pump is provided having a nozzle-sealing member resiliently urged to form a sealing closure. The sealing member is part of a normally non-passing pressure control valve that recirculates excess fluid back to the inlet of a positive displacement fluid pump. The fluid is recirculated with elevated pressure after a threshold fluid pressure is exceeded. The disclosed system provides for energy conservation and pump cavitation speed increase. The system may be integrated with an engine balance shaft module so as to provide low cost robustness to low speed gear noise emissions by application of the oil pump's drive torque to at lease one gearset.

Abstract: The vacuum generator is capable of quickly and securely holding and releasing a work piece and capable of reducing amount of consuming compressed air. In the vacuum generator, a first nozzle and a second nozzle jet compressed air toward a diffuser nozzle. The second nozzle has a diameter greater than that of the first nozzle. Switching means switches a state of the vacuum generator between a first state, in which a small amount of air sucked from the vacuum port, and a second state, in which a large amount of air is sucked from the vacuum port. The first nozzle, the second nozzle and the diffuser nozzle are serially arranged in that order.

Abstract: In an ejector cycle having an ejector, a decompression amount of refrigerant between a gas-liquid separator and an evaporator is adjusted by a differential pressure control valve, so that a pressure increasing amount in a pressure increasing portion of the ejector is controlled to be equal to or lower than a predetermined amount. Therefore, a suction pressure of refrigerant to be sucked to the compressor can be restricted from being excessively increased in accordance with the increase of the pressure increasing amount in the ejector, and it can prevent heat radiating capacity of a radiator from being decreased. Thus, a sufficient cooling capacity can be always obtained in the ejector cycle.

Abstract: A flow amplifying pump apparatus includes a body member that defines a flow passageway and a compressed air inlet. The body member includes a main segment and an insert segment which extends into a container and rotates relative to the main segment. A cover member which lies releasably secured to the body member supports a plug assembly. The plug assembly includes a plunger that defines a groove for cooperating with a protuberance in the cover member to guide the plunger along a predetermined, substantially linear path.

Abstract: An ejector for use in a refrigeration system has a mixing tube or diffuser which is partitioned into multiple flow passages. Selectively directing a continuously flowing primary high velocity fluid jet stream, which stream entrains a secondary fluid, cyclically into each of the multiple flow passages creates an effective pulsing of the primary high velocity fluid jet stream with respect to each flow passage. Pulsing the primary high velocity fluid jet stream in this manner enhances the mixing and compression of the primary high velocity fluid jet stream and the secondary fluid in the diffuser.

Abstract: A hydrokinetic amplifier 10 having a primary liquid input formed into a primary liquid jet surrounded by a motivating vapor that transfers vapor momentum to the primary liquid jet and accelerates the primary liquid jet through a minimum cross-sectional area 20 upstream of a diffuser is provided with a secondary inlet that admits a secondary fluid to merge with the primary liquid jet in a diffuser 16 beyond the minimum cross-sectional area. Without varying the primary inflows of liquid and vapor, the secondary flow varies inversely with the fluid flow resistance of the output load; and this can be used to vary the volume, pressure, and temperature of the output. The product of the pressure and volume of the combined flows can exceed the product of the pressure and volume of the primary flow, and change in the load resistance can be used to turn the secondary flow on and off for adding a material to the primary flow.

Abstract: In a jet pump, the suction pressure (Po) generated may be kept constant within predetermined limits and times by varying the pressure ratio f(p) providing a prescribed value for the pressure ratio f(p) is determined by computer-aided iterative changing of an existing value of the pressure ratio f(p) using an algorithm and a measured value for the pressure (Pe) of the delivery fluid.

Abstract: A diverter valve for use in a pneumatic conveying system includes a valve plate and a seal plate which have juxtaposed surfaces and are supported for relative movement therebetween so as to enable alignment of an input convey line port in the valve plate between alternate discharge convey line ports in the seal plate. Annular seals are supported in seal grooves circumferentially of the ports in the seal plate and are adapted for fluid pressure biasing into sealing engagement with the opposed valve plate by means of a fluid pressure control circuit. The seals are adapted to be subject to vacuum by the pressure control circuit so as to retract the seals from sealing relation with the valve plate during shifting movement of the valve plate. The seal plate and fluid pressure control circuit are further adapted to effect fluid pressure flow across the sealing surfaces of the seals during retraction thereof so as to clean the seals while in their retracted positions.

Abstract: A hand held and controlled air activated vacuum pump for testing vacuum systems and controls against atmospheric exudations that adversely affect their performance.

Abstract: An adjustable ejector capable of adjusting the fluid flow conditions resulting from fluid flow through the ejector. Adjustment means are provided for varying the fluid presentation size ratio of the inlet nozzle throat to the mixing throat. The adjustment means includes at least one adjustable path structure disposed in either the inlet nozzle or the mixing throat, or both.

Abstract: A mixer-ejector with jet effect incorporates inductor nozzles opening into a venturi profile conduit having in succession a highly convergent suction sleeve, a coupling wall and a diffuser. The coupling wall is a variable-profile venturi part, consisting of a hollow sleeve made of a distortable elastic material in a casing with leaktight sealing and incorporates means for introducing a fluid into the enclosure formed by the sleeve and the casing.

Abstract: In a vacuum cup assembly including a body having a vacuum chamber and a vacuum cup communicating with the vacuum chamber for supporting a workpiece, a venturi jet connected to a source of pressurized air and the vacuum chamber and an air outlet, there is provided an air blow-off silencer having an inlet mounted upon the air outlet, an intermediate apertured web and a silencer chamber containing an air silencer assembly. A poppet valve is guidably positioned within the web having an advanced rest position and retractable relative to a pressure chamber in the web to an air blocking position. Application of pressurized air to the pressure chamber moves the poppet valve to close the air outlet of the vacuum cup assembly, the pressurized air to the venturi assembly by-passing to the vacuum chamber to blow off the workpiece.

Abstract: An aspirator using positive pressure from a suitable source generates a vacuum pressure when the primary source of vacuum pressure, typically the engine intake manifold, prodcuces insufficient vacuum pressure to operate a device such as a road speed control servomotor. The aspirator assembly is connected to the source of positive pressure and the engine intake manifold as well as to atmosphere and to the device to be operated by vacuum power. When there is sufficient intake manifold vacuum pressure for the desired purpose, there is no flow through the aspirator and the engine intake manifold supplies all of the vacuum needs of the servomotor. When aspirator vacuum pressure is required due to insufficient manifold vacuum pressure, the aspirator is opened to generate aspirated vacuum pressure and the connection between the servomotor and manifold vacuum is closed. The aspirated air is delivered to the engine intake manifold.

Abstract: Means adapted to receive a supply of compressed air and discharge the compressed air therefrom in a regulated manner via a selected port therein, control means within the means, for use in diverting the flow of the supply of compressed air within the means to thereby divert the air from the selected port to a further port in the means, whereby at least a partial vacuum condition is created in the selected port, allowing the ingress of air therethrough from without the means, the ingressed air mixing with the diverted air so as to be discharged through the further port.

Abstract: A solar heating system for a swimming pool and the like is disclosed. The system includes a circulation circuit having a pump by which water is withdrawn from the pool, passed through a filter and returned to the pool. A solar collector assembly is provided and has flow and return lines connected in said circuit. The flow line is connected to a venturi unit in the main circuit and a control valve is provided immediately downstream of the venturi unit. When the control valve is closed, water is diverted through the venturi unit and into the solar collector assembly for heating. When the valve is open, the venturi unit induces a suction effect in the flow line which causes the solar collector assembly to be positively drained into the circuit. A vacuum breaker admits air to the collector assembly at this time.

Abstract: A vacuum producing device comprises a venturi unit which functions to produce or stop producing a vacuum after predetermined movement of a surrounding sleeve and air shut off member and includes silencing means for substantially reducing the sound of pressure air passing through the device.