Abstract: Disclosed herein is a vacuum ejector pump. The pump is operated by compressed air which is supplied to or discharged from the pump at high speed, thus creating negative pressure in an outer surrounding space. The ejector pump includes a frame having an air inlet pipe, a disc, and an air outlet pipe which are sequentially arranged to be spaced apart from each other. The parts are coupled into a single structure via a spacer. A nozzle is mounted to pass through the center of the disc, and a flexible valve member is mounted to the spacer A nozzle body is accommodated in a cylindrical casing having a hole at a position corresponding to the valve member, and defines a chamber inside the spacer. A locking structure is provided on the casing and the nozzle body so as to prevent the casing, which accommodates the nozzle body, from rotating.

Abstract: When coils of a vacuum pump unit are excited by energization, a piston equipped with magnets reciprocates in a cylinder. Thus, air is sucked in from an outlet passage of a diffuser of an ejector, and air discharged from the vacuum pump unit is supplied to an inlet of a nozzle of the ejector. Consequently, a fast jet occurs in a throat portion of the nozzle, and a negative pressure of higher degree of vacuum than that of the suction negative pressure of the vacuum pump unit is produced at a vacuum port of the ejector. The negative pressure is supplied from a negative pressure supply port. The ejector can supply a negative pressure of high degree of vacuum while reducing the load on the vacuum pump unit.

Abstract: According to the invention, a vacuum pump is disclosed comprising a screw-rotor pump having a compression section (8) and an expansion section (7), and wherein a discharge (10) from the compression section communicates with at least one ejector (1) for discharge of compressed gas through the ejector, and wherein the expansion section (7) is connectable via a first valve means (5), to a drive-gas source (P) for operating the screw,-rotor pump and the ejector in parallel. Also, a method for providing sub-pressure to an industrial process is disclosed wherein at least one ejector (1) is used initially to reduce the pressure to a predetermined lower level, from where the pressure is further reduced by means of a screw-rotor pump (7, 8) that is arranged to operate through, and in parallel with the ejector.

Abstract: The invention provides a jet pump comprising a housing containing a nozzle into which an injected fluid is introduced, the housing also possessing a suction orifice, the pump comprising, upstream from the outlet of the nozzle, an auxiliary chamber associated with two sealing elements, each sealing element being adapted to open when the pressure of the injected fluid exceeds a predetermined level, the first sealing element opening at a first pressure level, the second sealing element opening at a second pressure level greater than or equal to the first.

Abstract: The invention pertains to the field of jet technology and relates to an operating process of a multiple-stage pump-ejector-separator system which essentially includes bypassing a motive liquid from a second-stage separator into a first-stage one and subsequent delivery of the motive liquid from the first-stage separator to the suction port of a pump. The invention also relates to a device for realizing the process which essentially constitutes a multiple-stage pump-ejector-separator system, wherein the suction side of a pump is connected to a first-stage separator, the first-stage and second-stage separators are interconnected by a vertical U-tube acting as a hydro seal, where the height of the U-tube above the motive liquid level in the second-stage separator is not less than the height of the liquid column created in the U-tube by the motive liquid from the second-stage separator under a pressure difference between the two separators.

Abstract: A three element, three phase hydrodynamic torque converter having improved structural and hydrodynamic characteristics, and automatic transmissions that use a plurality of such hydrodynamic torque converters as replacements for multiple disc wet clutches or the like to effect transmission ratio changes. The hydrodynamic torque converters use a centrifugal impeller and a centrifugal turbine on the forward axial side of the torque converter, and a centripetal stator mounted to the converter shell on the rearward axial side. Three phase operation results when using the specified geometries: [1] torque multiplication, where the speed ratio i=n.sub.t /n.sub.p is greater than one; [2] coupling phase, where the speed ratio approaches one; [3] extension phase, where the speed ratio equals one and then exceeds one. For operation with speed ratio i=n.sub.t /n.sub.p in the range 0.6 .ltoreq.i .ltoreq.1.3, operational efficiency .eta. is found to be between 82 and 88 percent.

Abstract: A suction apparatus useful as a vacuum pump, aerator or the like comprises a fluid inlet housing having a nozzle support plate which includes a plurality of nozzles having a discharge outlet located within a suction chamber. These nozzles each align with the passageway of a hollow suction tube having an inlet within the suction chamber and an outlet spaced from a deflector plate. A fluid such as liquid is ejected from the discharge outlet of the nozzles and in the course of passage into the suction tubes a negative pressure is created within the suction chamber which draws a second fluid such as air through the suction chamber and into the passageway of the suction tubes for combination with the liquid therein forming a combined liquid-gas fluid stream.

Abstract: A process and device for compressing a fluid by releasing a working fluid that includes an initial pocket wherein the working fluid circulates, a second pocket in which the fluid to be compressed circulates, a third pocket wherein the mixture of the working fluid circulates along with the fluid to be compressed, with the mixture being supplied from a mixing pocket that is connected to the third pocket as well as to the first and second pockets. The mixing pocket has a ring-like configuration and the first and second pockets are connected to the mixing pocket through passages that are adapted to introduce the working fluid and fluid to be compressed substantially tangentially. The device is adaptable to compress or pump an effluent which is of an oil type nature.

Abstract: There is provided an in-line, two-stage, variable-bypass injector pump for controllably admixing a secondary fluid to a main fluid. The pump comprises a housing connectable into a pipe line carrying the main fluid and a main venturi extending along the central axis of the housing having an entrance and a throat and exit portion. The pump also includes a secondary venturi off center but substantially parallel to the central axis. The exit portion of the secondary venturi leads into the throat portion of the main venturi. One end of a connector leads into the throat portion of the secondary venturi and the other end of the connector is connectable to a source of the secondary fluid. An eccentrically located passage way permits a variable proportion of the main fluid to flow from one end of the housing to the other end thereof, while bypassing the main venturi. The bypassed flow is controlled by means of a shutter between a maximum and zero flow.

Abstract: The present invention relates briefly to an improved multi-ejector having at least one set of ejector nozzles (12, 13, 14, 15) arranged successively for evacuating of successively arranged chambers (5, 6, 7) which chambers are in communication with a vacuum collecting compartment (16) through ports (18, 19, 20) provided with valves. At least one additional set of nozzles (24, 25) evacuates a chamber (4) in direct communication with the vacuum collecting chamber (16) and the outlet therefrom is arranged in connection with the chamber (5) in which the lowest negative pressure is existing when the first mentioned set of ejector nozzles (12, 13, 14, 15) is operating.

Abstract: A constriction in a pipeline forces a portion of the pipeline flow to follow a bypass channel wherein it drives a turbine or Pelton wheel before being returned to an output beyond the constriction. In one embodiment, a pump provides a high velocity flow along a second bypass path which is applied through one or more nozzles to accelerate the fluid in the main bypass path.

Abstract: A centrifugal aspirator includes an enclosed cylindrical vortex chamber having a plurality of high pressure fluid inlets tangentially oriented with respect to a cylindrical wall of the vortex chamber, an intake inlet approximately centrally disposed in one end of the vortex chamber for conducting a conveying fluid and solid particles contained in the conveying fluid, and an exhaust outlet disposed along the cylindrical wall of the vortex chamber for exhausting a mixture of the high pressure injected fluid, the aspirated conveying fluid and the solid particles.

Abstract: Fluid propulsive device for accelerating flow of fluid passing through the device, for pumping fluid, or solids carried in fluid, or for propelling the device through fluid. The device has a main body having a duct provided with primary and secondary jet means adapted to receive working fluid under pressure. The jet means extend peripherally around the duct generally within planes normal to duct central axis and direct conical sprays of working fluid downstream into the duct. Primary jet means sprays working fluid initially at a conical semi-angle of between 18.degree. and 30.degree. so as to converge inwards initially towards a theoretical apex of the cone of the spray adjacent the duct central axis. Secondary jet means disposed downstream of the primary jet means within plane containing theoretical apex sprays fluid initially at angle of between 6.degree. and 10.degree. to duct side wall.

Abstract: A low cost liquid proportioning and mixing device of high accuracy dispensing a solution or mixture involving volume, pressure and flow rates and including a multi-stage jet proportioning and mixing device in which any variation occurring in the designed ratio of the mixture is confined essentially to the first proportioning stage operating at a low solution ratio below 1 to 5 with the pressure of free flowing solute entering the zone of confluence for each stage and the pressure of the mixture leaving the zone of confluence being essentially equal and the outflow area of any final discharge opening is possibly less but not greater than the flow area of the conduit opening from the zone of confluence of the final stage with or without a conduit used between them, the final proportion of the solution being the multiplicand of the solution proportion of the individual stages.

Abstract: A multiple stage jet proportioning and mixing pump system in which any variation occurring in the proportion ratio of the ultimate solution is confined essentially in the first proportioning stage operating at a low ratio below 1 to 5 with initial confluence of solvent and solute at substantially atmospheric pressure followed by the primary mixture being supplied to the second proportioning operation at a pressure preferably equal to that of the solvent jet at their confluence.