Abstract: A concrete vibrator includes a housing, a handle, an electric motor, a flexible shaft, a vibrator head, and a battery pack. The handle extends from the housing. The electric motor is coupled to the housing. The flexible shaft has a first end coupled to the motor and an opposite, second end. The vibrator head is coupled to the second end of the shaft. The vibrator head is configured to receive torque from the motor and the shaft to cause the vibrator head to vibrate. The battery pack is coupled to a battery receptacle defined on the housing. The battery pack is configured to provide electric power to the electric motor to drive the motor and the shaft. The concrete vibrator is operable in a briefcase configuration in which the handle is used to carry the concrete vibrator with the housing supported in a horizontal orientation.

Abstract: The invention discloses a method for producing bio-fuel (BF) from a high-viscosity biomass using thermo-chemical conversion of the biomass in a production line (10) with pumping means (PM), heating means (HM) and cooling means (CM). The method has the steps of 1) operating the pumping means, the heating means and the cooling means so that the production line is under supercritical fluid conditions (SCF) to induce biomass conversion in a conversion zone (CZ) within the production line, and 2) operating the pumping means so that at least part of the production line is in an oscillatory flow (OF) mode. The invention is advantageous for providing an improved method for producing biofuel from a high-viscosity biomass. This is performed by an advantageous combination of two operating modes: supercritical fluid (SCF) conditions and oscillatory flow (OF).

Abstract: A vacuum suction cup assembly, including a vacuum cup, a vibration assembly, and a vibration shock absorber. The vacuum cup includes a skirt and is configured to be pressurized when placed against a surface to retain the vacuum cup against the surface in any orientation. The vibration assembly includes a vibrator; a vibration transfer plate on which the vibrator is mounted; and at least one vibration transfer blocks disposed on an opposite face of the vibration transfer plate from the vibrator, wherein the at least one vibration transfer blocks is configured and arranged to transmit a majority of the vibration forces from the vibrator to the surface. The vibration shock absorber is disposed between the vibration assembly and the vacuum cup.

Abstract: There is provided an electric compressor to be fixed an object including a compression mechanism, an electric motor, a housing, a supporting member, and a plurality of vibration damping members. One of the housing and the supporting member has a recess and the other of the housing and the supporting member has a projection that is disposed in the recess and engaged with the recess to form a plurality of accommodating spaces on opposite sides of the projection, respectively. A filling rate of each vibration damping member in the corresponding accommodating space is changeable. There is also provided a method for manufacturing the electric compressor, including preparing a plurality of vibration damping members, choosing one of the vibration damping members, and providing the supporting member to the outer peripheral surface of the housing while accommodating the chosen vibration damping members in the respective accommodating spaces.

Abstract: A vibrator tool for use in inserting a bottom hole assembly into a wellbore. The vibrator tool includes a substantially cylindrical body, a motor within the substantially cylindrical body, and a non-linear shaft attached to the motor so that the motor turns the non-linear shaft. The non-linear shaft extends outwardly from the motor within the substantially cylindrical body. The vibrator tool further includes a bearing attached to the shaft a predetermined distance from the motor so that the bearing rotates as the non-linear shaft turns. The bearing contacts portions of the inner surface of the cylindrical body as the non-linear shaft turns, thereby vibrating the substantially cylindrical body.

Abstract: A system and method for mixing a gas and a liquid includes, receiving a liquid at a liquid inlet of a convergent nozzle and ejecting the liquid at a predetermined output velocity from a liquid outlet of the convergent nozzle into a mixing chamber, the mixing chamber comprising a cantilevered reed positioned within the mixing chamber. The ejection of the liquid from the liquid outlet causes the cantilevered reed to vibrate at an intrinsic frequency. The vibration of the cantilevered reed induces resonance between the liquid and the cantilevered reed and the resonance results in an ultrasound wave within the liquid. Upon the introduction of a gas into the liquid within the mixing chamber, the mixing of the gas into the liquid is effected by the ultrasound wave generated by the cantilevered reed.

Abstract: A concrete vibrator for a hopper which feeds concrete to a slip form is mounted to the outer surface of the hopper wall. The vibrator is fixed to the end of a tube which extends into the hopper through a hole in the hopper wall. A rubber isolator molded on the tube is clamped between flanges one of which is welded to the outer surface of the hopper wall.

Abstract: A micro particle flow facilitator, includes: (a) a bourdon tube having a flexible duct capable of expanding and contracting in response to pulsations of a pressurized fluid, the duct being hollow, closed-ended and having an inlet port; and (b) a fluid pulsator for providing the pulsations of a pressurized fluid to the inlet port of the bourdon tube, the pulsator being in fluid-tight communication with the inlet port of the bourdon tube and having a fluid inlet port for connection to a source of pressurized fluid.

Abstract: A system and method for controlling a mixing system at a peak energy efficiency point, maximum response point or reduced sound generation point based on displacement, velocity, acceleration or jerk operating conditions.

Abstract: A turbine vibrator has a housing, an eccentric rotor mounted in an air chamber of the housing and two covers mounted respectively in two mounting recesses of the housing. Two threaded walls defined respectively around the mounting recesses of the housing have same threaded directions. Therefore, the mounting recesses, the air chamber and the other mounting recess are formed sequentially so axes of the mounting recesses and the air chamber are disposed along a same line. Manufacturing processes of the housing is reduced and shearing forces applied to the shafts of the eccentric rotor are reduced so the turbine vibrator has a prolonged useful life. Moreover, as a rotating direction of the eccentric rotor and the fastening directions of the covers are the same, when the turbine vibrator operates, the covers tighten against the housing. The first and second covers do not drop from the housing.

Abstract: An apparatus and method for mixing by producing shear and/or cavitation, and components for the apparatus are disclosed. In one embodiment, the apparatus includes a mixing and/or cavitation chamber with an element such as an orifice component that is located adjacent the entrance of the cavitation chamber. The apparatus may further include a blade, such as a knife-like blade, disposed inside the mixing and/or cavitation chamber opposite the orifice component. In one version of such an embodiment, at least some of the portions of the orifice component surrounding the orifice and/or the blade are made of a material or materials that have a Vickers hardness of greater than or equal to about 20 GPa. A process for mixing by producing shear and/or cavitation in a fluid is also contemplated herein.

Abstract: A coupling device for an atomic force microscope with acoustic sample excitation includes a sound generator, in particular an ultrasonic test head, and designed for coupling of sound waves generated using the sound generator into a sample body for the acoustic excitation of the sample body, where the coupling device has a liquid reservoir fillable and/or filled with a liquid in its inner space; the lower side of the sample body can be arranged and/or is arranged laterally displaceably on the liquid reservoir; the end of the sound generator formed for coupling the sound waves into the sample body is arranged in the inner space of the liquid reservoir and/or that sound waves can be coupled into the inner space with this end; and the spatial section of the inner space of the liquid reservoir disposed between this end and the lower side of the sample body is completely fillable and/or filled with the liquid.

Abstract: A turbine vibrator has a housing, an eccentric rotor mounted in an air chamber of the housing and two covers mounted respectively in two mounting recesses of the housing. Two threaded walls defined respectively around the mounting recesses of the housing have same threaded directions. Therefore, the mounting recesses, the air chamber and the other mounting recess are formed sequentially so axes of the mounting recesses and the air chamber are disposed along a same line. Manufacturing processes of the housing is reduced and shearing forces applied to the shafts of the eccentric rotor are reduced so the turbine vibrator has a prolonged useful life. Moreover, as a rotating direction of the eccentric rotor and the fastening directions of the covers are the same, when the turbine vibrator operates, the covers tighten against the housing. The first and second covers do not drop from the housing.

Abstract: A continuous phase liquid and a dispersed phase liquid are permitted to flow together through a co-flow channel. Preferably, the dispersed phase liquid is arranged to flow within the flowing body of the continuous phase liquid in the co-flow channel so that the dispersed phase liquid is sheathed by the continuous phase liquid. The continuous phase and dispersed phase liquids are comminuted into microparticles in the co-flow channel by intermittently blocking the co-flow channel.

Abstract: A diffuser provides the ability to diffuse one or more infusion materials into a host material. A rotor and stator rotate relative to one another. The infusion materials are drawn through openings in the rotor and stator. These openings are also causing turbulence within the host material, which is flowing through an area between the rotor and stator. As aligned openings pass one another, succussion occurs, which provides energy to diffuse the infusion materials into the host material to an extremely high degree. The opening patterns in the rotor and stator can be designed to operate at a single frequency or at multiple frequencies. The frequencies of operation may affect bonding between the infusion materials and the host material and may also be effective in break down of complex molecular structures.

Abstract: The invention relates to a vibration generator comprising a working piston and to a construction apparatus having a vibration generator, wherein the vibration generator is operated by a pressure fluid and comprises a control device having a control piston, which is supported in a displaceable manner inside the working piston.

Abstract: A mixing and/or conveyance method and a mixing and/or conveyance device for a fluid substance, comprising a sample chamber, a cavity communicating with the sample chamber, said cavity being configured for accommodating a compressible medium, and a sound source that may be coupled to the compressible medium for the production of a fluctuation in pressure in the compressible medium. In the region of its mouth, the cavity is designed such that, in the case of an expansion in the volume of the compressible medium in the cavity, a directed fluid stream of the fluid substance escapes from the cavity through its mouth. A sample processing chip (‘lab on a chip’) comprising such a mixing and/or conveyance device.

Abstract: An ultrasonic treatment chamber and a process for ultrasonically treating a liquid in an ultrasonic treatment chamber include an elongate, generally tubular housing having an inlet and an outlet spaced longitudinally from the inlet. Liquid is directed into the housing at the housing inlet for longitudinal flow within the housing to the housing outlet. Mechanical ultrasonic vibration is generated within the housing in direct contact with the liquid flowing within the housing, with the direct contact being upstream of the housing outlet. A standing acoustic wave is produced within the housing with the standing acoustic wave having a node spaced longitudinally from the housing outlet.

Abstract: A vibratory apparatus and method for settling the contents of a container. The vibratory apparatus includes a base and a load table located above the base. A plurality of resiliently flexible vertical support members attach the load table to the base. A pneumatic linear vibrator is attached to the load table and is adapted to the vibrate the load table along a line of stroke that is generally linear and generally horizontal. One or more vacuum cups are attached to the top of the load table to releasably secure the container to the load table for vibration. The vibrator can independently vary the amplitude and the frequency of the vibration of the container to maximize settling of wllthe contents of the container.

Abstract: A cavitation system for forming and imploding cavities within a cavitation chamber is provided. The system includes a hydraulically actuated driver coupled to the cavitation chamber. A cavitation piston, coupled to a hydraulic piston, forms the desired cavities during piston retraction and then implodes the cavities during piston extension. Preferably the cavitation fluid is degassed prior to hydraulically driving cavitation within the chamber. Degassing can be performed within the cavitation chamber or within a separate degassing chamber which is preferably connected to the cavitation chamber. In one aspect, a coupling sleeve is interposed between the hydraulic driver and the cavitation chamber, the coupling sleeve housing at least a portion of the cavitation piston drive rod. Preferably the coupling sleeve can be evacuated. In another aspect, a cavitation fluid circulatory system is coupled to the cavitation chamber.

Abstract: Vibrational energy generated with a pneumatic vibrator is controlled to independently adjust the amplitude and the frequency. A mechanical resonator is used to adjust the frequency. The controlled vibrational energy can be applied to equipment, such as a heat exchanger to mitigate fouling.

Abstract: A compressed air or gas operated vibrator that has a cylindrical housing with a raceway located and formed therein. The raceway is sized and shaped for guiding a rolling member along an orbital path. The vibrator also includes at least one removable end cap for closing any open ends of the housing. The cylindrical housing has an inlet port for directing a flow or jet of the compressed gas to and towards a selected point of the raceway. The vibrator also has an outlet port for exhausting gas from the housing. The vibrator further includes a turbine wheel that rotates inside of the housing with a predetermined clearance. The turbine wheel has a plurality of blade members formed along its outer diameter and a recess portion that is formed into its outer diameter for allowing the rolling member to reside therein while also allowing the rolling thereof.

Abstract: With the aim of enhancing the efficiency of pneumatically driven vibrators, with an essentially closed casing (2), in whose operating space (3) a cylindrically-shaped, unbalanced rotor (1) is mounted in bearings in such a way as to be capable of rotation, and which exhibits a channel for inflow and outflow (4, 5) that is at least tangentially directed in relation to this rotor (1), so as to allow for an air-driven mode of operation, it is intended-in accordance with this invention-that the cross-section of the pneumatic stream that flows from every inflow channel (4), between the exterior surface of the rotor (1) and the inner wall of the operating space (3), should first be steadily reduced-in the direction of the current-down to the narrowest cross-section, and then be steadily increased, up to the corresponding outflow channel (5).

Abstract: A pneumatically-driven, turbine device comprises a Terry turbine rotor coaxially disposed within a rigid housing equipped with a reentry port bordering an exhaust port. The rotor comprises a plurality of radially spaced-apart air buckets. An air pathway is established between an inlet and an exhaust outlet, extending through the reentry port, the exhaust port, and portions of the rotor buckets. The reentry port comprises a narrow arc defined in the race. At least a portion of the exhaust groove borders, but is separated from, the reentry port. Entering air initially impacts a first rotor bucket disposed adjacent the reentry port. Halves of the first two buckets are disposed radially adjacent the reentry port. Opposite halves of the first and second buckets adjoin the unmachined race area spaced apart from the reentry port.

Abstract: A vibration generating device is provided. Where a bucket link is replaced by the vibration generating device, the vibration generating device is connected to a main operating valve by conduits. Since both flow rate control valve and fluid motor are housed within a casing, a high pressure conduit for connecting the vibration generating device and main operating valve is not necessitated, thereby making the structure compact, and making the working of conduit arrangement easy and improve reliability. The center axial line of the cylinder chamber, rotary axial line of the valve element of the rotary valve and center axial line of the valve element of the flow rate valve are made parallel to one another so that these cylinder chamber, rotary valve and flow rate control valve are arranged in a superposing fashion, thereby making the entire vibration generating device compact.

Abstract: The air-driven vibrator (10) includes a disc-shaped vibratory element (40) movably received in a disc-shaped working chamber (38). Upon injecting air jets into the chamber (38) through tangential injection ports (46), the element (40) is rotated and oscillated to generate vibration. The feature of the vibrator is that inwardly directed projections (66, 72) are provided on the inner end faces (34, 36) of the chamber (38) to prevent the element (40) from sticking to the end faces (34,36) when the vibrator is not in use. Due to the provision for the projections (66, 72), the edge of the element (40) need not be chamfered. This enables mass production of the elements (40) and increases the production yield of the elements (40).

Abstract: An industrial vibrator for imparting vibrations which cause the flow of bulk particulate matter. The industrial vibrator is comprised of a housing and a reciprocating piston vertically movable within the cylinder bore of the housing. The piston is driven by compressed air causing the piston to rapidly and repeatedly strike a striking plate formed by the bottom of the housing thereby imparting vibrations to a hopper or bin to initiate and maintain movement of bulk particulate material. The striking end of the piston has a threaded bore for receiving a reciprocally threaded extension of an elastomeric tip so that the elastomeric tip is fixedly attached to the piston. The elastomeric tip reduces the decibel noise level caused by the piston's repeated impacts on the striking plate to levels acceptable under industrial safety and comfort standards.

Abstract: A mixing apparatus is used in mixing two fluids, such as two liquids, a liquid and a solid, or a liquid and a gas, within beer fermenter, microorganism culture mediums, waste water disposal plants, and other chemical processes. It is high in efficiency and simple in maintenance and repair. In particular, this apparatus utilizes sound vibration which sends pulses through the apparatus and adds a fluid to the other fluid to be mixed. Therefore, the mixing efficiency level can be raised by using this fluid mixing apparatus.

Abstract: A pneumatic vibrator having reduced noise levels is provided with an exhaust chamber in a baseplate thereof. The exhaust chamber is limited by walls of the baseplate, a bushing, and the outer surface of a hollow elastic element. The elastic element is a truncated cone, the smaller base of which firmly encompasses a bushing around a tie element, while the larger base bears against the baseplate. The exhaust chamber is in communication with an above-membrane chamber via a central through duct. The above-membrane chamber connects with the atmosphere by radial ducts in the cover of the baseplate, in which an annular collector is made, communicating with the radial ducts. The flow area of each of the ducts is less than the flow area of the collector. Coaxial axial ducts made in the cover and in the baseplate communicate with a second annular collector made in the baseplate and exhaust air to the atmosphere.

Abstract: A method and an apparatus for the automatic quantitative filling of powdered or granulated samples for analytic measurement purposes as well as a shaking and holding device for sample substances utilized therefor with which precisely admeasured amounts of the sample substance can be filled into a measuring vessel. The shaking device permits the sample substance to be filled in a continuous, slow and defined flowing stream. The shaking and holding of the sample vessel transpires preferentially pneumatically.

Abstract: In a process for sterilization and homogenization of a liquid or fluid, these operations are carried out by subjecting the liquid or fluid to ultrasonic frequency vibrations for a predetermined period of time. In a device for carrying out the process, the liquid taken in from a tank (10) is sent by a pump (11) to a chamber (1), inside of which or in proximity to which is arranged a sonotrode (5) connected to a converter-generator (14). As it travels through this chamber (1), the liquid is subjected to vibrations and is sterilized or homogenized.

Abstract: Vibrations are created in a flow conduit by constraining a bluff object having a plurality of positions between which flow of fluid forces the bluff object. In a preferred embodiment, the vibration technique is utilized in a gravel packing tool. Gravel pack sand is placed while the gravel pack tool is vibrated by balls constrained within a wash pipe. A considerably improved gravel pack density is achieved.

Abstract: An improved pneumatic vibrator configuration is provided. Specifically, the vibrator is annular in configuration which enables functional elements of adjacent components in a multi-component system to be passed through the vibrator. The configuration of the annular vibrator of the present invention conserves space in multi-component manufacturing systems.

Abstract: The compressed air vibrator has a housing (1) with an inlet opening (8) for admitting compressed air to a chamber (14) and an outlet opening (9) for the exit of air from the chamber (14). Ball bearing assemblies (11, 15) are disposed with slight play on the shafts (2a, 2b) of the rotor (2). These ball bearings are fitted, also with slight play, in bores (12a, 13a) of oppositely located covers (12, 13) that close about the rotor (2) and close the open ends of chamber (14). The play is adjusted in such a way that the outer races (11a, 15a) of the ball bearings turn in the bores (12a, 13a) of the covers during the rotational movement of the rotor (2). The vibrator also can include a counter-flow air brake to slow rotor rotation.

Abstract: A pneumatic vibrator is disclosed including a tubular housing having closed ends, an inlet port in the housing through which a fluid, such as air can flow into the housing, and a free-floating piston in the housing having two passageways through which the pressurized air entering the housing through the inlet port flows to act alternately against opposite ends of the piston and cause the piston to reciprocate in the housing. Exhaust ports are located in the housing through which the air ahead of the moving piston is exhausted from the housing. A plurality of relatively small openings is located in the housing through which pressurized air can flow into the housing and provide a fluid bearing between the piston and the housing, and means are provided to supply the inlet port opening with air under pressure.

Abstract: A flow cone aerator for assisting discharge of material from containers. The aerator includes an inverted cone shaped hollow support adapted to be affixed to a wall of the container with the small diameter end of the support adjacent the interior surface of the container and the large diameter end extending into the interior of the container. An air inlet is positioned adjacent the small diameter end and is adapted to be selectively connected to a pressurized source of air exteriorly of the container. At least one air outlet port radially extends through the wall of the support. A flexible cone shaped flap, corresponding in shape to the support, is mounted to the small diameter end of the support with the large diameter end of the flap free of attachment to the support.

Abstract: The invention relates to a piston vibrator comprising a case with at least one cylindrical bore (5), at least one air connection (7) taken laterally to the bore (5), and a piston (2) longitudinally displaceable in the bore (5). As a means of making such a vibrator more efficient with a given outside diameter, or as a means of making it more compact and smaller with the same degree of efficiency, the invention proposes that the cylindrical bore (5) should extend asymmetrically to the external wall area (6) of the case, at least at the axial level of the air connection (7).

Abstract: An elastic bar member is coupled to an orbiting mass oscillator and the entire assembly is suspended from a cable or the like such that the bar member has freedom of lateral motion and is nakedly immersed in a slurry having particulate material contained therein such as a mineral ore reject from which metal has been extracted. The rotor of the orbiting mass oscillator is driven at a speed such as to generate cycloidal sonic energy in the bar preferably at a frequency such as to set up resonant standing wave vibration of the bar in a cycloidal quadrature pattern. The cycloidal vibrational energy tends to set the surrounding fluid material into a whirling rotation or rotary traveling wave which facilitates the agglomeration or coagulation of the particles in the material and enhances the settling operation to make for more complete separation of the particles from the liquid.

Abstract: An elastic bar member is clamped to an orbiting mass oscillator and the entire assembly is suspended from a cable or the like such that the bar member has freedom of lateral motion and is nakedly immersed in a leachant having a material contained therein such as a mineral ore from which metal is to be extracted. The rotor of the orbiting mass oscillator is driven at a speed such as to generate cycloidal sonic energy in the bar preferably at a frequency such as to set up resonant standing wave vibration of the bar in a cycloidal nutating pattern. The cycloidal vibrational energy tends to set the surrounding fluid material into a whirling rotation or rotary traveling wave which facilitates the mixing of the ore and leachant and enhances the leaching operation to make for more complete separation of the mineral from the ore.

Abstract: A screw shaped rotor is freely mounted for rolling rotation in a mating screw shaped stator which is mounted in a housing. The rotor is rotatably driven by means of a fluid stream to generate sonic energy in the housing with a lateral mode of vibration at a frequency which is the function of the rate of fluid flow. The oscillator housing is coupled to the load which it drives uniformly along the entire length of the oscillator. The drive fluid for the oscillator is coupled thereto through a flexible coupling such as a section of rubber hose so that this coupled end of the oscillator is not substantially constrained against lateral vibration and is free to vibrate laterally along with the rest of the housing. The oscillator housing may be coupled along its entire length to the load to be vibrationally driven or can be suspended in a liquid which is to be vibrationally energized.

Abstract: A fluidization apparatus for powder coating devices is provided which comprises a housing that is subdivided by a porous horizontal wall into an upper housing portion and a lower housing portion. The lower housing portion is provided with a compressed air feed. The upper housing portion is provided with a connecting conduit to an injector fed with compressed air and is provided with a powder feed above and through its cover. The lower housing portion is a cylinder having a circular floor area in which an air turbine is mounted and which includes an unbalanced mass. The upper housing portion is a cuboid having a quadratic floor area, whereby the length of a quadratic side corresponds to the length of the diameter of a filter mat having the shape of a circular disk, the filter mat separating the upper and lower housing portions.

Abstract: A device to mechanically decompose a barrier which separates two or more mutually miscible ingredients and mixes the said ingredients, preferably a mixer for amalgam in capsules. The device 1 comprises first members to fixedly hold the said ingredients and second members to impart to the said ingredients a sufficiently rapid motion to accomplish the said barrier decomposition and mixing.The said first members comprise a closable space 4 into which the said ingredients and said capsule 2 respectively are admissible and by which these or this respectively is or are respectively aligned with the said second members 14, 15. The said second members 14, 15 are arranged to be started only upon or after closing of the said closable space 4.

Abstract: A bone cement mixing device has a holding chamber mounted in a housing for vibration with its top extending through the top of said housing. A nitrogen operated vibrator vibrates said holding chamber and the interior of said chamber is connected to a vacuum source. A gun cartridge is placed in said holding chamber to receive bone cement ingredients to be vibrated and placed under a vacuum to deaerate the combined ingredients.

Abstract: A compressed-air vibrator with a turbine drive, which includes an unbalanced cylindrical rotor, an essentially closed housing having a cylindrical chamber in which the rotor is rotatably supported, with an inlet opening on the housing for the inlet of compressed air into the chamber, and with a discharge opening for the egress of air from the chamber. The rotor is constituted of at least two segments which possess different specific weights to provide the necessary imbalance.

Abstract: An impact vibrator for electrostatic precipitators and the like having a vibrator means interconnected in coaxial alignment with a mounting means adapted to receive a conventional rod member, the mounting means being interconnected to the vibrator whereby relative movement therebetween is restricted in the axial direction while permitting relative rotational movement therebetween about the axis. In a preferred embodiment, the vibrating piston disposed within the vibrator means directly engages a portion of the mounting means also disposed within the vibrator during the impact stroke.

Abstract: The invention relates to a concrete mixer truck having a rotatably driven mixer drum, particularly a drum provided with interior mixing elements, and a hydraulic system as a drive source for the mixing process.It is intended to enhance the effect of the mixing process by transmitting vibration energy to the mixture materials. To this effect, a vibration generator is included in the hydraulic system in such a manner that pressure pulses generated in the flow of the hydraulic fluid are superimposed on the mixing movement in the form of vibrations. This superposition effect may be achieved with respect to the rotation of the drum and/or with respect to the movements of a separate mixing tool.

Abstract: An elongated casing is provided and is closed at one end. A fluid pressure actuated elongated internal vibrator of the type including an internal fluid pressure driven eccentric weight orbital about an axis extending centrally longitudinally through the vibrator is provided and is loosely telescoped into the other end of the casing. The other casing end is tightly closed about the adjacent end of the internal vibrator and the interior of the casing is filled with a hard fluent aggregate disposed about the vibrator and a pair of annular members are tightly mounted upon and extend about longitudinally spaced portions of the vibrator and include outer peripheral portions spaced inward of the inner surfaces of the casing. The vibrator and its surrounding aggregate filled casing may be suspended in a tank containing well effluent of the type comprising water and oil and having gas suspended therein.

Abstract: A rotary vibrator having a cylindrical shape and an outer cam strip running the length thereof is mounted in a housing which has a matching inner cam strip and is affixed to a structure to be vibrated. Vibrator migratory movement during operation causes the vibrator cam strip to engage the adjacent surface of the housing and the housing cam strip to engage the adjacent surface of the vibrator. This wedging effect gives rise to a third point of vibrator-housing contact located essentially equidistant from the other two contact points and displaced therefrom approximately 120.degree.. Thus, a secure inter-locking between the vibrator and its mount is achieved. A source of compressed gas may be attached at either end of the vibrator and an exhaust outlet located in the vibrator directs the pressurized driving fluid into the space between the vibrator and housing for vibrator cleaning and lubrication and for quieter vibrator operation.

Abstract: A vibrator is provided which includes a free rolling rotor contained in a housing having a nose end portion. The rotor has a number of pockets for receiving ball pistons. Each pocket communicates with a valve port. Pressurized fluid sequentially passes through each valve port to the pocket with which the particular valve port communicates. In the pocket accessed by the pressurized fluid, a fluid chamber is created. The ball piston prevents the escape of fluid outwardly of the rotor. The pressurized fluid, in each accessed fluid chamber, causes the rotor to roll in the housing. The rotor rolling around within the housing applies centrifugal forces to the inside wall of the housing to produce vibrations. The fluid escapes from the rotor using the same valve ports which deliver the pressurized fluid. In addition, an assembly is provided in the housing to prevent the separation of the nose end portion from the housing when the nose end portion becomes worn and tends to separate from the housing.

Abstract: A dental scaler in which a scaling tool is coupled to a relatively rigid inner tubular member supported within an outer housing for vibration in response to relatively high speed rotation of a thin-walled tubular element located within an inner chamber in the inner tubular member and rotated by the passage of air, under pressure, through the inner chamber.