Abstract: An improved dual-stage pump system is provided for the accurate pumping and filtering of viscous fluids. Two hydraulically activated pumps are provided in series with a filter and reservoir disposed in-line between the two pumps. The reservoir acts as a source bottle for the second pump and allows the first pump to pump the viscous fluid through the filter at a rate independent of the dispensing rate of the second pump. By operating the first pump at a rate independent of the second pump, back pressure at the filter is avoided. Each hydraulically activated diaphragm pump is equipped with an improved diaphragm that is pre-formed to the geometries of the process fluid cavity thereby eliminating any inaccuracies in the operation of the pumps due to expansion of retraction of the diaphragm during pump operation.

Abstract: Liquid-ring gas pump with a working chamber in which an impeller (6) rotates and which is bounded axially by a control plate (7) past which the impeller (6) moves with a small clearance and which has at least one intake and/or discharge opening (21, 22, 23) and is composed of rolled sheet. According to the invention, the edges (26) of the intake and discharge openings are at least in part bent over towards the side facing away from the impeller (6) and are rounded on the side facing the impeller and raised on the side facing away from it.

Abstract: A plasma stream is formed by plural plasma-forming gas through which electric currents are passed and on which a magnetic field is superposed a physical parameter of the plasma stream is monitored. The magnitude of force acting on one of the jets is varied until a required result is obtained. Plural plasma burners arranged at an angle to each other are connected to a power supply and a plasma-forming gas source. Each burner incudes an open magnetic circuit with a solenoid connected to another power supply. The physical parameters of the plasma stream are recorded. The recorder is connected to a processor having connected to both power supplies and plasma-forming gas source. The burners include a drive also connected to the processing unit.

Abstract: An improved pump structure including a shaft tube, a pivot tube, a piston element, a push and pull element and a handle element. The shaft tube is inserted inside the tube. The pivot tube's two ends are respectively connected to the handle element and the piston element. The piston element is disposed in the air chamber of the push and pull element. By an ingenious arrangement of holes, tubes and unidirectional valves, the reciprocating travels of the push and pull element permit simultaneous pumping and air intake, increasing the pumping efficiency.

Abstract: A vibration isolating mounting for an electric fuel pump on a plastic retainer of a reservoir in a motor vehicle fuel tank includes a tubular wall on the plastic retainer and a plurality of elastic tubes squeezed between the tubular wall and the fuel pump to support the fuel pump on the tubular wall in radial static equilibrium. In a first preferred embodiment, the elastic tubes are formed integrally with an elastic sleeve fitted over the fuel pump. In a second preferred embodiment, each of the elastic tubes has a pair of diametrically opposite integral radial webs closely received in vertical slots in the tubular wall and in a tubular inner retainer around the fuel pump.

Abstract: A pumping module is provided for use with an external dispensing machine, for dispensing pumped material. The pumping module has multiple motor driven pumps in modular cabinets which may be coupled together in various directions and three-dimensional space. Pumping modules located remote from the dispensing apparatus are directly coupled to the dispensing apparatus with continuous conduits which pass through intervening modules.

Abstract: A windshield washer pump includes an entrance connector having a check valve disposed therein and a plurality of annular raised portions disposed thereon, and an exit connector having a check valve disposed therein and a plurality of annular raised portions disposed thereon for effectively spraying the washing liquid and mating with various types of hoses, and a pair of vertical and longitudinal engagement holes disposed on a mounting bracket for easily mounting to the engine body.

Abstract: An apparatus for generating a stream in a body of water has at least one cylinder installed under water, and a water-jet pump housed in the cylinder. The pump draws water in through one end of the cylinder and produces a stream of water accelerated by a driving fluid supplied from an external source. The stream is discharged through another end of the cylinder to promote a flow in the body of water.

Abstract: A vacuum pump includes a plurality of rotors accommodated in a housing, a plurality of bearings for supporting the shafts of the rotors, respectively, a fluid-suction opening and a fluid-discharge opening formed in the housing, and a motor for driving at least one of the rotors. The pump has a first pump structure section for suction and discharge of gas, the pressure of which is in a viscous flow region, by utilizing change in volume of a space formed by the rotors and the housing. A second pump structure section is provided for transporting gas, a pressure of which is in an intermediate flow region, and gas, the pressure of which is lower than a pressure of the intermediate flow region, by utilizing movement of the space from a suction side to a discharge side of the second pump structure section.

Abstract: A movable magnet type pump, wherein a magnet moving body having at least one axially magnetized permanent magnet and an axially extending through liquid passage is arranged so as to be slidable inside a liquid introducing chamber; a plurality of coils are fixed so as to enclose the liquid introducing chamber; a first check valve is arranged on a liquid introducing side of the liquid introducing chamber; a second check valve is arranged on a liquid discharge side of the through liquid passage; and the magnet moving body is caused to reciprocate by interaction between current applied to the respective coils and magnetic flux from the magnet moving body cutting across the respective coils.

Abstract: This invention relates to an improvement in valve assemblies for reciprocating sucker rod operated subsurface pumps and specifically as to the traveling valves and standing valves. The traveling valve includes a valve body having an inwardly-directed lip at the bottom with the valve seat, ball and cage inserted from the top of the valve body. Further the standing valve is positioned in the upper portion of a bushing threaded into the bottom of the pump barrel, thus placing the standing valve and the traveling valve in closer proximity at the bottom of the downstroke than prior such pumps.

Abstract: A universal automotive air conditioning compressor assembly with interchangeable mounting rings and suction and discharge manifolds. The compressor includes a universal casing body which will substitute for a large variety of original equipment compressors. The casing has grooves which removably receive interchangeable mounting rings. Various configurations of mounting rings are provided to match original equipment specifications for a wide variety of vehicle makes. The assembly also may include suction and discharge manifolds which are also interchangeable and which adapt the universal compressor unit to the particular suction and discharge hoses, eg., V-style or pad-style, in the original air conditioning system. Thus, by selecting the appropriate mounting rings and manifold style, a universal compressor is adapted for installation in a specific make and model of automotive air conditioning system.

Abstract: A fluid pump with a rotary impeller is disclosed which comprises an electromagnetically-driven, bearing-free, seal-free rotary impeller levitated by localized opposed, magnetic forces and by fluid forces, or by localized opposed magnetic forces only. Levitation by localized opposed magnetic forces alone or by a combination of magnetic and fluid forces of an impeller driven by electromagnetic forces eliminates the need for bearings and seals in the driving mechanism. This avoids the heat build-up and leakage associated with other pumping mechanisms, which can be of importance in pumping of physiological fluids such as blood. The levitating forces of the present invention are applied both axially and radially with respect to the impeller. The magnetic forces are provided by a combination of diamagnets or solenoids, opposed by permanent magnets, solenoids or electromagnets.

Abstract: In a water ring type vacuum pump, an impeller (6) having a plurality of blades (6a) is rotatably provided in a pump chamber (3) communicating with an air inlet (1b) and an air outlet (1d), and a water inlet (1a) for feeding sealing water to a center portion of the pump chamber is further provided. Sealing water that has moved to a peripheral wall portion (3a) of the pump chamber (3) flows back to a center portion (3b) of the pump chamber (3). By this arrangement, the sealability of sealing water can be improved and the sealing water can be saved in amount.

Abstract: A liquid ring machine having a housing in which there is rotatably arranged a rotor having its axis displaced by an amount of eccentricity with respect to the axis of the housing. The liquid ring machine is capable of optimal use in simple manner for both vacuum and compression operations. This result is obtained by ensuring that amount of eccentricity from the housing axis to the rotor axis is directed to oppose the direction of the force of gravity in vacuum operations and is directed in the direction of the force of gravity in compression operations.

Abstract: An air-operated pump includes a pair of poppet valves affixed to a vertical valve shaft and arranged so that the upper valve is closed when the lower valve is open, and vice versa. When a connected displacer is immersed in tank fluid, its buoyancy in combination with a bias spring translates the valve shaft to operate the poppet valves. An upper poppet valve chamber is connected [1 ] via a restrictance to an auxiliary air supply, and also [2] to an air operator that triggers a three-way pneumatic valve, an inlet port of which controls a main air supply while a second port is vented to atmosphere. A third port transmits an air supply to the tank through the intermediation of a quick exhaust valve, which rapidly vents the tank at the end of each pump cycle and also serves to isolate the three-way valve from any tank-fluid contamination.

Abstract: A self-priming centrifugal pump includes a cylindrical metal plate case forming a pressure chamber and provided with a suction inlet and a pressure outlet. The pressure chamber has a bladed impeller with a peripherally arranged diffuser, an axial ejector device including a venturi tube, and a torus-shaped interspace adapted to convey the emitted flow from the radial diffuser towards the pressure chamber. A single curved blade is arranged in the lower portion of the interspace and extends from the peripheral region of the radial diffuser up to a central annular outlet passage of the interspace which extends all around said ejector device in such a manner to counteract the rotational component of the fluid speed direction and to promote separation of air.

Abstract: An air pump piston is provided peripherally with a first leakproof ring and a second leakproof ring, which are located respectively and contiguously at both ends of the piston. Located peripherally between the first and the second leakproof rings is a radially disposed air hole. The piston is fastened at the second end thereof with a piston rod such that the air hole of the piston is in communication with an axial passageway of the piston rod. The piston is further provided peripherally between the first leakproof ring and the air hole with at least one first duct disposed radially. The piston is still further provided peripherally with at least one second duct which is disposed radially and located between the second leakproof ring and the air hole. The piston is provided at the first end thereof with an air admitting hole in communication with the first duct. The piston is provided at the second end thereof with an air duct in communication with the second duct.

Abstract: A fluid rotating apparatus includes a plurality of rotors accommodated in a housing, at least one of the rotors having its outer diameter different from that of the other of the rotors. Bearings are provided for supporting rotary shafts of the plurality of rotors. A fluid suction port and a fluid discharge port are formed in the housing. A motor is provides for rotating at least one of the plurality of rotors, and a control system for synchronously controlling the plurality of rotors in a contactless manner is provided for each rotary shaft of the plurality of rotors.

Abstract: An electronic pump selector system uses a programmable processor to select one of a plurality of pumps to be energized in response to an appropriate feedback signal from the selected pump. A current limited feedback circuit is incorporated which provides a varying voltage in response to a level switch associated with a selected pump indicating a high fluid level. In response to the voltage feedback signal, the selected pump is energized for a predetermined period of time. Subsequently, another pump is selected. The next selected pump is energized also for a predetermined period of time in response to a varying voltage feedback signal therefrom. The next pump is then selected and the sequence continued.