Abstract: A surface compactor machine includes a compacting surface for compacting a substrate, a first motor, a second motor, a support assembly, and a controller. The first motor rotates a first eccentric shaft. The second motor rotates a second eccentric shaft. The support assembly is connected to the first and second eccentric shafts to transfer vibration forces to the compacting surface. The controller controls speed of at least one of the first and second motors so that a rotational speed of the second eccentric shaft is an integer, greater than 1, times faster than a rotational speed of the first eccentric shaft to generate a composite displacement waveform that vibrates the compacting surface upwards and downwards, wherein the composite displacement waveform includes a zero amplitude coordinate, a wave section located above the zero amplitude coordinate, and a wave section located below the zero amplitude coordinate that is asymmetric relative to the wave section located above the zero amplitude coordinate.

Abstract: An eccentric assembly for a compaction machine may include an outer eccentric mass and first and second inner eccentric masses. A length of the outer eccentric mass is in a direction of an axis of rotation of the outer eccentric mass. The first inner eccentric mass is rotatably connected to the outer eccentric mass by a first joint, and the second inner eccentric mass is rotatably connected to the outer eccentric mass by a second joint. Moreover, the first and second inner eccentric masses are separate, and the first and second joints are separate. Related compaction machines are also discussed.

Abstract: A battery powered concrete vibrator is provided with a vibration head; a brushless DC motor disposed in the vibration head; a drive shaft disposed in the vibration head, rotatably disposed through the brushless DC motor, and operatively driven by the brushless DC motor, the drive shaft including a lengthwise groove on an outer surface, thereby rendering the drive shaft unbalanced; and a groove-shaped vibration member put on the drive shaft. The drive shaft can impart rotation to the vibration member.

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 vibratory grout consolidator for eliminating gaps and voids in grout by attaching to reinforcing bars extending within masonry block walls and encapsulated within the grout. The device includes a clamp including a bar sleeve having a first part attached to a first arm and a second part attached to a second arm. The bar sleeve has a pair of open ends that allow a reinforcing bar to extending fully through the bar sleeve. A vibration source is attached to the clamp so that when the bar sleeve is engaged with the reinforcing bar, vibration is transmitted to the reinforcing bar and encapsulating grout.

Abstract: A vibratory grout consolidator device for eliminating gaps and voids in grout by attaching to reinforcing bars extending within masonry block walls and encapsulated within the grout. The device includes a clamp including a bar sleeve having a first part attached to a first arm and a second part attached to a second arm. The bar sleeve has a pair of open ends that allow a reinforcing bar to extending fully through the bar sleeve. A vibration source is attached to the clamp so that when the bar sleeve is engaged with the reinforcing bar, vibration is transmitted to the reinforcing bar and encapsulating grout.

Abstract: A clamping mechanism particularly for clamping a vibrator to a reinforcing bar. The clamping mechanism provides a slot which intersects a channel. The channel is longitudinally open in one direction at one side of said intersecting slot and longitudinally open in the opposite direction at the other side of said intersecting slot. A reinforcing bar or other member to be engaged first enters the slot then moves into the channel. Once in the channel, the bar or other member is positively retained therein.

Abstract: A rotary throttle assembly is disclosed for operating a power unit such as an engine or a motor in either a first power setting or a second power setting. The rotary throttle assembly may be used in a concrete vibrator to operate the vibrator in either an idle power setting or a desired power setting. The throttle assembly includes a rotatable throttle handle, a linkage mechanism contained in a casing, and means for urging the throttle assembly selectively to adopt a first position or a second position.

Abstract: A clamping mechanism particularly for clamping a vibrator to a reinforcing bar. The clamping mechanism provides a slot which intersects a channel. The channel is longitudinally open in one direction at one side of said intersecting slot and longitudinally open in the opposite direction at the other side of said intersecting slot. A reinforcing bar or other member to be engaged first enters the slot then moves into the channel. Once in the channel, the bar or other member is positively retained therein.

Abstract: An electronic frequency converter is used with a high frequency immersion vibrator in order to compact concrete. The frequency converter comprises a cooling circuit containing a cooling medium; a first heat exchanger which is integrated into said cooling circuit and is used to transmit heat generated in the housing of the frequency converter to the cooling medium; and a second heat exchanger which is integrated into the cooling circuit and is used to outwardly transmit heat absorbed by the cooling medium. The second heat exchanger is received in a vibrator housing of the high frequency immersion vibrator. If the vibrator housing is immersed in concrete, the heat produced in the converter housing can be conducted away to the concrete.

Abstract: The invention relates to the setting of poured concrete and the need to avoid air pockets and voids within the setting slurry. At least one reinforcing rod, and preferably a grid of rods, is embedded in the poured concrete. The setting slurry is vibrated by vibrating the rod or grid. A vibrator receives the protruding end of the rod and is vibrated to vibrate the rod.

Abstract: A vibrator having a metallic cylindrical core with a shaft extending concentrically therethrough. An eccentric weight is mounted on the shaft and is rotatable thereby to vibrate said vibrator. The core is surrounded by a sheath of material and apertures extend through said sheath to bare portions of said core. The external surface of the sheath is configured to present upstanding wall portions facing the direction of vibration whereby, when the vibrator is immersed in a wet slurry of concrete and vibrated therein, the upstanding wall portions drive shockwaves into the slurry.

Abstract: The invention relates to the setting of poured concrete and the need to avoid air pockets and voids within the setting slurry. At least one reinforcing rod, and preferably a grid of rods, is embedded in the poured concrete. The setting slurry is vibrated by vibrating the rod or grid. A vibrator receives the protruding end of the rod and is vibrated to vibrate the rod.

Abstract: An apparatus and method for improving the structure of saturated masses of granular materials. The apparatus comprises an axially elongated probe having a generally cylindrical side wall and upper and lower ends, the lower end being adapted to penetrate the mass, the side wall having a screen portion to restrict the passage of particles therethrough, and to pass water therethrough into a space within the probe. There is a vibrating member located within the probe and generally adjacent the screen portion to generate a vibrating force within a region of the mass. At least one impeller blade is located within the probe generally adjacent the vibrating member to generate a low pressure zone to draw the water from said region into the space. A discharge conduit communicates with the space associated with the screen portion and the conduit extends upwardly to the upper end of the probe.

Abstract: A vibrator having a metallic cylindrical core with a shaft extending concentrically therethrough. An eccentric weight is mounted on the shaft and is rotatable thereby to vibrate said vibrator. The core is surrounded by a sheath of material and apertures extend through said sheath to bare portions of said core. The external surface of the sheath is configured to present upstanding wall portions facing the direction of vibration whereby, when the vibrator is immersed in a wet slurry of concrete and vibrated therein, the upstanding wall portions drive shockwaves into the slurry.

Abstract: An improved head for use with a concrete vibrator for settling concrete/aggregate is provided. The head includes a hollow casing with an eccentric rotor having a curved segment along one side and supported for rotation by a bearing at a first or drive end. A second bearing is provided adjacent a second, distal end of the rotor. In one embodiment, the second bearing includes a bushing of disparate material, such as brass. A lubricant in the casing forms a thin, high pressure oil film between the bushing and the internal surface of the distal end cap, as well as between the curved segment of the rotor and the internal surface of the casing. Since the eccentricity of the rotor is extended, enhanced vibration is obtained. In this first embodiment, the bushing is brazed to the distal end of the rotor and the casing is steel. The bushing is arcuate and is positioned in close proximity to the internal surface of the distal end cap along the curved segment and at its axial edge.

Abstract: An improved head for use with a concrete vibrator for settling concrete/aggregate is provided. The head includes a hollow casing with an eccentric rotor having a curved segment along one side and supported for rotation by a bearing at a first or drive end. A second bearing is provided adjacent a second, distal end of the rotor. In one embodiment, the second bearing includes a bushing of disparate material, such as brass. A lubricant in the casing forms a thin, high pressure oil film between the bushing and the internal surface of the distal end cap, as well as between the curved segment of the rotor and the internal surface of the casing. Since the eccentricity of the rotor is extended, enhanced vibration is obtained. In this first embodiment, the bushing is brazed to the distal end of the rotor and the casing is steel. The bushing is arcuate and is positioned in close proximity to the internal surface of the distal end cap along the curved segment and at its axial edge.

Abstract: An improved head for use with a concrete vibrator for settling concrete/aggregate is provided. The head includes a hollow casing with an eccentric rotor having a curved segment along one side and supported for rotation by a bearing at a first or drive end. A second bearing is provided adjacent a second, distal end of the rotor. In one embodiment, the second bearing includes a bushing of disparate material, such as brass. A lubricant in the casing forms a thin, high pressure oil film between the bushing and the internal surface of the distal end cap, as well as between the curved segment of the rotor and the internal surface of the casing. Since the eccentricity of the rotor is extended, enhanced vibration is obtained. In this first embodiment, the bushing is brazed to the distal end of the rotor and the casing is steel. The bushing is arcuate and is positioned in close proximity to the internal surface of the distal end cap along the curved segment and at its axial edge.

Abstract: A lightweight, portable concrete vibrator is provided. A vibrator head includes a hollow casing with an eccentric rotor having a curved segment along one side extending in an arc of 120.degree. so as to position the rotor centroid at the most favorable position to induce maximum vibration for aggregate distribution and filling of voids or air pockets in wet concrete. An inverted, V-shaped stiffening segment is formed on the opposite side of the rotor. The ratio of the centroid offset from the rotation axis to the diameter is in the range of 1:3.5-1:3.75. A tubular support assembly forms the handle for the motor. Preferably, the motor is a small, two cycle engine operating in the range of 5,000 to 7,000 rpms. A bearing sleeve may be provided adjacent the distal end of the vibrator head in order to accommodate any incidental lateral flexing of the rotor in the casing.

Abstract: In a concrete finishing machine having a plurality of vibrators to be at least partially submerged in concrete or other semi-fluid viscous material for vibration thereof, a monitor is provided for displaying and/or recording operational parameters of the plurality of vibrators. The monitor includes a display, responsive to signals generated by sensors operatively associated with the plurality of vibrators, for providing a visual indication of operating parameters for the plurality of vibrators, and a recording device receiving the signals generated by sensors operatively associated with the plurality of vibrators and recording the operating parameters for the plurality of vibrators.

Abstract: The method of treating an aqueous, cementitious slurry, to enhance fluidity, that includes providing a container for the slurry and effecting movement of the slurry via an impeller, in the container, and locating at least one vibrator in the interior of the vessel, and operating the vibrator to transmit vibration to the moving slurry.

Abstract: In a vibrator intending to be at least partially submerged in concrete or semi-fluid or viscous material for vibration thereof, the vibrator having a housing open at one end and enclosing a rotating eccentric weight assembly, and a motor attached to the housing open end driving the rotating eccentric weight, a vibration speed sensor includes a magnetic pick-up disposed in a port in an end wall of the motor and adjacent an end of a gear/gear shaft of magnetic material in said motor, wherein the gear/gear shaft has a discontinuity adjacent the magnetic pick-up, whereby rotation of the gear/gear shaft is sensed by the magnetic pick-up. The motor includes hydraulic inlet and outlet ports in the motor end wall with the magnetic pickup port disposed adjacent thereto. An output cable is connected to the magnetic pick-up and extends in parallel with hydraulic hoses attached to the hydraulic inlet and outlet ports.

Abstract: An apparatus for use in compacting or densifying soils includes a tubular casing having a vertical longitudinal axis and an inside surface; a hollow tubular drive shaft aligned with the vertical longitudinal axis of the tubular casing and mounted for rotation therein; a drive motor for rotating the drive shaft; a carrier attached to the drive shaft for rotation therewith; and a cylindrical roller weight in rolling contact with the inside surface of the tubular casing. The carrier engages the roller weight for rotation about the vertical longitudinal axis of the tubular casing. The centrifugal force resulting from rotation of the roller weight is resisted by the tubular casing thereby causing vibration thereof.

Abstract: A vibrator for use in concrete or other semi-fluid or viscous material is provided with a casing having an open chamber therein, a cap detachably connected to the casing, a cantilevered stub shaft extended into the chamber from the cap, a bearing on the stub shaft, and an eccentric weight mounted on the bearing for rotation about an axis and the stub shaft for generating vibrations.

Abstract: A vibrator for immersion in wet concrete includes a relatively rigid shell with an internal vibrating mechanism. A cover is provided on the shell formed of a material softer than the shell whereby to lessen the effects of the impact of the shell on any encountered object such as a reinforcing rod. The cover is made, for example, of a plurality of rings arranged in axial series defining passages therebetween to provide access to the shell for cooling the same. The covering on the shell is intended to avoid chipping of, for example, epoxy coatings which are employed on reinforcing rods. As an alternative to the rings the covering can be formed with holes to provide passages for the cooling. The passages flare outwardly and are devoid of undercuts and recess to avoid entrapping cured and hardened concrete. A method can be employed of forming fins on the shell by which the cover is firmly attached to the shell, being molded thereupon.

Abstract: A vibrator for compacting construction materials has a housing having a housing mantle with a first end face and a cylindrical interior. The housing has an upper part for closing the housing at the first end face. The upper part is axially inserted into the housing mantle and secured in a closing position thereof against axial displacement. A radially inwardly extending support surface is connected within the housing mantle. An electric motor is drivingly connected to an unbalanced shaft. The electric motor has an inner rotor end an outer cylindrical stator pack end is inserted into the housing mantle from the first end face. The stator pack has a recess and is inserted into the housing mantle with sliding fit and secured against rotation. A spreading element made of spring steel for securing the stator pack is inserted into the housing mantle through the first end face and positioned on the stator pack before closing the housing to be clamped between the support surface and the upper housing part.

Abstract: A vibrator is provided which includes a relatively rigid shell with a vibrating mechanism being provided within the shell to cause the same to vibrate. A flexible shaft is coupled to the vibrating mechanism to drive the same. Moreover, a cover is provided on the shell formed of a material softer than the shell whereby to lessen the effects of the impact of the shell on any encountered object such as a reinforcing rod. The cover is made, for example, of a plurality of rings arranged in axial series. The rings include projections and are provided with notches or receptacles for receiving the projections. The projections on respective of the rings are engaged in the receptacle of the next adjacent rings in the axial series. The vibrator may be inserted, for example, in a setting concrete to remove air and voids therefrom. The covering on the shell is intended to avoid chipping of, for example, epoxy coatings which are employed on reinforcing rods to avoid the corrosion of the same.

Abstract: An unbalance vibrator comprises a drive shaft mounting unbalance weights, one of which is fixed stationary while the other one is turnable with respect to the drive shaft, and a mechanism for adjusting their mutual position made in the form of a rod spring-loaded in an axial direction and fitted in the movable unbalance weight so as to be movable radially, and adapted to interact with the other unbalance weight. The fixed unbalance weight is made in the form of a cylindrical sleeve having radial holes provided on its inside cylindrical surface. The movable unbalance weight is made in the form of at least a part of a cylinder arranged inside the cylinder, the rod being mounted so as to be engageable in one of the radial holes provided on the inside cylindrical surface of the sleeve.

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: This invention provides apparatus and processes for vibratory finishing of parts wherein the parts are attached to a vibrating head which has internal vibrating mechanism and mechanism for transmitting power to the vibrating mechanism in the vibrating head, then the vibrating head with the parts attached is submerged in the media and the parts vibrated to accomplish the desired finishing. This invention eliminates the necessity for any portion of the vibratory finishing apparatus to vibrate except for that portion which is submerged in the media, namely the vibrating head and attached parts, which is submerged in the media. The finishing provided by this invention is fast, quiet, efficient, effective and versatile.

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: Three or more (preferably an even number) of hollow vibration bars are joined together at one end thereof with the bars spaced from each other and with their longitudinal axes in substantially parallel relationship. Each of the bars has an unbalanced rotor mounted therein which when rotatably driven will generate vibrational energy in the associated bar. The similar rotors of the bars are phased with relationship to each other to generate a combined vibrational force pattern in a liquid in which the bars are immersed which affords optimum agitation of the liquid in an omnidirectional manner. The vibration at the juncture between the multiple bars is kept at a minimum by virtue of the cancellation of the force vectors generated by the bar members at this point.

Abstract: A poker vibrator includes an extra weight which is mounted on the hose accommodating the power supply of the vibrator of the poker vibrator assembly connected to the end of the hose. The extra weight is mounted on the hose in the vicinity of the casing. the extra weight is also in the area of the hose where it is manually held by the operator when using the poker vibrator. The poker vibrator equipped with the extra weight prevents or at least damps the vibration amplitude and with it the intensity of the vibration in the area of the hose manually held by the operator.

Abstract: Vibrations having a frequency exceeding 150 Hertz are established in a rigid body by means of a vibrator system that in one embodiment includes a pair of rotating wheels, only one of which has a weighted eccentric secured to its axle. The wheels are coupled together by an endless belt made of a material that dampens the vibrations propagating between the wheels. The unweighted wheel is driven by a flexible shaft connected to its axle. In another embodiment three wheels are used in which two are weighted at the axles. The vibrator system may be used to sink pipes and the like into the ground, or shake a sorting table employed, for example, in the mining industry or a silo hopper for discharging grain. Also disclosed is a method for sinking a pipe or the like into the ground and retrieving it after lowering it a predetermined distance. In this method, wires are attached at each end of the pipe for facilitating its downward motion and its retrieval.

Abstract: The invention provides a vibrator for shaking materials, comprising a drive, a shaft which can be connected to the drive and which is supported on the casing, at least by a bearing, and further comprising an imbalance member supported by the shaft, in the form of an inert mass arranged eccentrically of the shaft.As a means of improving a vibrator of this type to make it easier to mount, the invention provides that the imbalance member (10) should be arranged loose on the shaft (5). It is desirable for the imbalance member (10) to be provided in contact with the shaft (5) and at least partly enclosing it. If the imbalance member (10) is semi-cylindrical and has bearing boxes (12) at both ends, in accordance with a further embodiment of the invention, the bearing boxes will be light compared to the inert mass of the imbalance member, and their only function will be to surround the shaft and provide a contact surface or contact line.

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 vibrator with attached prongs which achieves the breakup of compacted materials in structures similar to silos, grain elevators and railroad cars is set forth. Attached to the pronged vibrator is a cable which allows the vibrator to be lowered into the structure where breakup is to be accomplished. The vibrator is housed within a shell of dimensions applicable to the particular use. Secured to the vibrator shell are a multiple of prongs. The vibrator when in operation causes not only the sphere to vibrate, but also the attached prongs. The vibrator is capable of imparting varying frequencies to the compacted materials and may be adjusted to reach the natural frequency of the compacted material. Thus where the vibrator comes into contact with the compacted material, breakup is achieved both by the physical action of the prongs and also by achieving the natural frequency of the material which in and of itself causes breakup.

Abstract: A rotating unbalanced weight vibrator is provided. The vibrator comprises a vibrator housing defining and lying on a first axis, and a motor housing having two ends and being normally generally nonconcentrically arranged within the vibrator housing so as to define and lie on a second axis normally inclined relative to the first axis. The motor housing includes a stator extending radially outwardly from the second axis, a drive shaft extending through the stator along the second axis, and a rotor connected to the drive shaft at one of the ends of the motor housing. A universal joint coaxial with one of the axes connects the vibrator housing with the other end of the motor housing so as to preclude rotational movement of the housings relative to each other while permitting orbital movement of the one end of the motor housing about the first axis in response to rotation of the rotor.

Abstract: Immersion vibrator of the type employed for consolidating poured concrete and employing an unbalanced rotor, characterized by a gerotor type motor, operated by hydraulic pressure, for rotating the rotor. It is of particular utility as an accessory to certain paving machines having an engine driven hydraulic circulating pump.

Abstract: In a preferred embodiment of the invention, a dental scaler for the cleaning of teeth in which the scraper is an air-driven vibrator having a scraper mounted on a distal end of a rigid tubular device, with the rigid tubular device being mounted within a resilient support permissive of vibrations of the rigid tubular device and the vibrations of the tubular device being brought about by the exiting of air onto an air-cushioned rotary wheel mounted around the tubular device rotatably, the rotation thereof resulting from the force of the air from preferably a plurality of ports permitting the air to exit from the ports against the inner surface of the air rotary wheel, and the rotation of the rotary wheel bringing about the vibrations which are imparted to the rigid shaft, while the firmly supported tubular shaft within the resilient support structure thereof itself amplifies the magnitude of the vibrations by itself vibrating and transmitting its vibrations back to the rotary wheel, the outlet ports from the tu