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12642results about "Vibration suppression adjustments" patented technology
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Variable stiffness electroactive polymer systems
InactiveUS6882086B2Piezoelectric/electrostriction/magnetostriction machinesResilient suspensionsActive polymerPolymer science
The invention relates to systems that provide variable stiffness and / or variable damping using an electroactive polymer transducer. Systems described herein offer several techniques that provide variable and controlled stiffness and / or damping. A transducer may be implemented using open loop control, thereby providing simple systems that inactively deliver a desired stiffness and / or damping performance. Alternately, closed loop control techniques permit electroactive polymer transducer designs that actively adapt the stiffness and / or damping performance of a system. Further, transducers may be implemented in a device whose stiffness changes with deflection of the polymer.
Owner:SRI INTERNATIONAL
Electroactive polymer devices for moving fluid
InactiveUS7064472B2Improve mechanical responseImprove responseTransducer detailsFlexible member pumpsHearing rangeThermal force
The invention describes devices for performing thermodynamic work on a fluid, such as pumps, compressors and fans. The thermodynamic work may be used to provide a driving force for moving the fluid. Work performed on the fluid may be transmitted to other devices, such as a piston in a hydraulic actuation device. The devices may include one or more electroactive polymer transducers with an electroactive polymer that deflects in response to an application of an electric field. The electroactive polymer may be in contact with a fluid where the deflection of the electroactive polymer may be used to perform thermodynamic work on the fluid. The devices may be designed to efficiently operate at a plurality of operating conditions, such as operating conditions that produce an acoustic signal above or below the human hearing range. The devices may be used in thermal control systems, such as refrigeration system, cooling systems and heating systems.
Owner:SRI INTERNATIONAL
Operation ready transportable data center in a shipping container
ActiveUS20080123288A1Effective shieldingDigital data processing detailsFurniture partsData centerComputerized system
A movable data center is disclosed that comprises a portable container in which an operable computer system is assembled. A data link, power supply link and cooling system are provided through ports on the exterior of the container. The computer system is assembled to a rack that is secured to the container with a shock absorbing mechanism.
Owner:ORACLE INT CORP
Sound insulating system
The present invention relates to a sound insulating system. The sound insulating system comprises a first sound absorbing layer. A barrier layer is positioned adjacent the first sound absorbing layer. A second absorbing layer is also provided and is adjacent the barrier layer.
Owner:DOW GLOBAL TECH LLC
Torsional damper having variable bypass clutch with centrifugal release mechanism
InactiveUS6854580B2Restraint torsionReduce torqueYielding couplingRotary clutchesCentrifugal forceControl theory
A torsional damper (10) rotatably supported for translating torque between a prime mover and the input of a transmission including a torque input member (12) that is operatively connected for rotation with the power take-off of a prime mover, an output member (14) operatively connected for rotation with the input to a transmission and a plurality of damping elements (16) interposed between the input member and the output member. The damping members (16) act to translate torque between the input and output members and to dampen torsional forces generated between the prime mover and the transmission. A bypass clutch (40) acts to translate torque directly between the input and output members thereby providing a path for partial torque translation that bypasses the damping elements at low rotational speeds of the input and output members. In addition, the torsional damper (10) includes a clutch release mechanism (42) that is responsive to centrifugal forces acting on the torsional damper to disengage the bypass clutch (40) to reduce the torque translated directly between the input and output members at high rotational speeds.
Owner:BORGWARNER INC
System for reducing vibrations in a pressure pumping fleet
ActiveUS10119381B2Vibration highReduce turbulenceAC motor controlPositive displacement pump componentsFracturing fluidHelical coil
Owner:US WELL SERVICS LLC
Lockup clutch with a compensation flywheel mass at the torsional vibration damper
A lockup clutch at a hydrodynamic torque converter is constructed with a torsional vibration damper which has a drive-side transmission element and a driven-side transmission element which is rotatable relative to the latter. Both of the transmission elements are provided with driving devices for driving elastic elements of a damping device. A carrier for a compensation flywheel mass is associated with the driven-side transmission element, wherein the carrier is connected with the turbine wheel on the one hand and with the driven-side driving device of the elastic elements on the other hand so as to be fixed with respect to rotation relative thereto and is provided at least with a cutout for receiving the compensation flywheel mass. The cutout has a guide path at least in its area of contact with the compensation flywheel mass, which guide path allows a movement of the compensation flywheel mass with at least one component perpendicular to the radial direction at the carrier.
Owner:ZF FRIEDRICHSHAFEN AG
Machine mounting system
Owner:SOLAR TURBINES +1
Nonwoven material for acoustic insulation, and process for manufacture
InactiveUS7837009B2Improve acoustic propertiesReduce weightLiquid surface applicatorsWallsMildewEngineering
Owner:GEORGIA PACIFIC NONWOVENS LLC
Operation ready transportable data center in a shipping container
ActiveUS7551971B2Effective shieldingDigital data processing detailsFurniture partsData centerComputerized system
A movable data center is disclosed that comprises a portable container in which an operable computer system is assembled. A data link, power supply link and cooling system are provided through ports on the exterior of the container. The computer system is assembled to a rack that is secured to the container with a shock absorbing mechanism.
Owner:ORACLE INT CORP
Isolator decoupler
An isolator decoupler comprising a pulley, a shaft, a bushing slidingly engaged with the pulley and slidingly engaged with the shaft, the pulley journalled to the shaft by a bearing, a one-way clutch fixed to the shaft and engaged with the bushing whereby the bushing rotates in unison with the one-way clutch, a torsion spring engaged between the pulley and the one-way clutch to resiliently couple the pulley to the shaft, and the pulley non-resiliently directly coupleable to the shaft in a temporary predetermined loaded condition.
Owner:THE GATES CORP
Hydrodynamic torque converter
ActiveUS20100269497A1Improve insulation performanceCost-effective manufacturingRotary clutchesFluid gearingsImpellerSnubber
The invention relates to a hydrodynamic torque converter with an impeller connected on the drive side arranged in housing and a turbine driven by the latter, connected with the driven side of the torque converter, with a turbine damper actively disposed between the turbine and driven side. To improve the vibration damping on the driven side of the torque converter, it is proposed the turbine damper with a first damper part formed out of an input part connected with the turbine and an intermediate flange, limited and rotatable opposite and against the action of at least a first energy accumulator and a second damper part with the intermediate flange and an output part limited and rotatable oppositely and against the action of at least a second energy accumulator, wherein an adaptive-speed vibration absorber is arranged on the intermediate flange.
Owner:SCHAEFFLER TECH AG & CO KG
Fire retardant nonwoven material and process for manufacture
An improved acoustically and thermally insulating fire-retardant composite material suitable for use in structures such as buildings, appliances, and the interior passenger compartments and exterior components of automotive vehicles is provided. The material is comprised of at least one airlaid fibrous layer of controlled density and composition and incorporating suitable binding agents and additives as needed to meet expectations for noise abatement, fire-retardancy, and mildew resistance. Separately, an airlaid structure which provides a reduced, controlled airflow therethrough useful for acoustic insulation is provided, and which includes a woven or nonwoven scrim. A process for the production of the fire retardant nonwoven material is also provided.
Owner:GLATFELTER CORP
Pumping system, vibration limiting device, and method
ActiveUS20170335842A1Positive displacement pump componentsPiston pumpsVibration amplitudeEngineering
A mechanism for limiting vibration amplitudes in a pumping system includes a plurality of pendulum absorbers coupled with a carrier and each having a pivoting range. The pendulum absorbers each further include a first and a second contact surface that contacts an outer peripheral surface of the carrier at limit stop positions, and each having a shape that is conforming with a shape of the outer peripheral surface. The pumping system may be used for pumping liquid nitrogen.
Owner:CATERPILLAR INC
Electroactive polymer devices for moving fluid
InactiveUS20060158065A1Improve responseTransducer detailsFlexible member pumpsHearing rangeThermal force
Owner:SRI INTERNATIONAL
Motion control system with digital processing link
InactiveUS20110208361A1Evenly spreading energy contentReduce generationProgramme controlSampled-variable control systemsVibration controlControl signal
A digital processing link for a vibration control system collects sensor signals at a transfer station and combines the sensor signals into a collective signal that is transmitted under a digital communications protocol to a base station. The sensor signals are separated at the base station and individually processed to produce one or more output control signals to actuators for counteracting the measured vibration.
Owner:LORD CORP
Active seat suspension
InactiveUS20060237885A1Reducing size of actuatorHigh frequencyPortable framesStands/trestlesDriver/operatorExertion
An active suspension for a driver seat of a bus or a heavy vehicle which comprises an electric actuator allowing the exertion of the force between the floor of the vehicle and the bottom of the seat. The adjustment of the height of the seat is accomplished by an electric actuator or by an independent mechanical system. A controller generates a control force calculated from measurements obtained by sensors located at different locations on the suspension. Forces exerted by the electric actuator can be relieved by passive element placed in parallel which cannot assume by themselves the role of a suspension for a given application.
Owner:BAULTAR I D
Nonwoven material for acoustic insulation, and process for manufacture
InactiveUS20080121461A1Improve acoustic propertiesReduce weightLiquid surface applicatorsWallsVolumetric Mass DensityEngineering
An improved acoustically and thermally insulating fire-retardant composite material suitable for use in structures such as buildings, appliances, and the interior passenger compartments and exterior components of automotive vehicles is provided. The material is comprised of at least one airlaid fibrous layer of controlled density and composition and incorporating suitable binding agents and additives as needed to meet expectations for noise abatement, fire-retardancy, and mildew resistance. Separately, an airlaid structure which provides a reduced, controlled airflow therethrough useful for acoustic insulation is provided, and which includes a woven or nonwoven scrim. A process for the production of the fire retardant nonwoven material is also provided.
Owner:GEORGIA PACIFIC NONWOVENS LLC
Precision vibration damping assembly and vibration damping platform composed of the assembly
InactiveCN101398636AAchieve precise positioningWith leveling and positioning functionPhotomechanical exposure apparatusMicrolithography exposure apparatusUltrasound attenuationDamping function
The invention discloses a precision damping component and a damping platform composed of the precision damping component, and the damping platform has damping function and positioning function along a Z direction. The precision damping component comprises a passive damping part, an active damping actuator and an external frame. The passive damping part is a piston rod with a structure of double cavities, an air pocket and a pressure cavity are respectively positioned in the two cavities, and the air pocket has larger longitudinal bracing power and lower rigidity, and can isolate the vibration of attenuation high frequency. The active damping actuator is a linear voice coil motor connected in parallel with the passive damping part, and applies acting force to a passive object according to the vibration condition and location information of the controlled object, so as to drive the controlled object to move to a designated position and compensate the vibration. The damping platform composed of at least three precision damping components has the functions of vibration damping with a plurality of degrees of freedom, accurately positioning along the Z direction, focusing and leveling. The precision damping component and the damping platform can be used in the apparatus with precision damping requirements such as mask aligners, ultra-precision numerically-controlled machine tools, biochip scanners and the like.
Owner:HUAZHONG UNIV OF SCI & TECH
Stabilization system for sensors on moving platforms
ActiveUS20110175604A1Improve mass balanceSmall biasAcceleration measurementFrequency analysisRotational stabilityAir bearing
A stabilized field sensor apparatus collects field data, in particular magnetic field data, with reduced motion noise. The apparatus includes a tear drop shaped housing, a tow frame in the housing, a plurality of vibration isolating dampers spaced around the frame, a base assembly mounted to the dampers, a support pedestal having a bottom end fixed to the base assembly and an upper free end, a single spherical air bearing connected to the upper free end of the pedestal, an instrument platform with a lower hollow funnel having an upper inside apex supported on the air bearing for a one point support, principal and secondary gyro stabilizers for maintaining pivotal and rotational stability, and at least one field sensor mounted to the instrument platform for collecting the field data while being stabilized against motion noise including vibration, pivoting and rotation from the base assembly, from the tow frame and from the housing. Stabilization of the instrument platform is enhanced by preserving accurate balance through a dynamic balancing system whereby small masses are moved under computer control to maintain the center of mass of the instrument platform at the center of rotation of the spherical air bearing. The dynamic stabilization process is made more precise by actively vibrating the instrument platform by a set of linear vibrators.
Owner:VALE LIMITED
Torque converter with turbine mass absorber
ActiveUS20090125202A1Simple designFlange mode is reducedRotary clutchesDigital data processing detailsFriction torqueSnubber
A torque converter having a first damper stage, a second damper stage, a floating flange torsionally connecting the first and second damper stages, an inertia element, and a tuned torsion damper. The torsion damper connects the inertia element and the flange. In a preferred embodiment, the inertia element is a turbine. In one embodiment, the first damper stage is a radially outer damper stage and the second damper stage is a radially inner damper stage. In another embodiment, the torsion damper generates a friction torque when rotated.
Owner:SCHAEFFLER TECH AG & CO KG
Motor/flywheel assembly with shrouded radial cooling fan
A flywheel / motor assembly is disclosed that comprises a motor housing having a sidewall and an end wall extending substantially perpendicularly from the sidewall. The end wall enclose a motor assembly having a rotatable shaft extending therefrom. The motor housing has at least one air flow opening therethrough. A flywheel is coupled to the shaft, and includes a pulley side and a motor side opposite the pulley side, wherein the motor side is aligned substantially with the end wall and does not extend over the sidewall. A plurality of vanes are associated with the flywheel, wherein adjacent vanes form channels therebetween. A ring is coupled to the plurality of vanes and at least partially encloses the channels and forms exhaust ports away from the shaft. Rotation of the flywheel draws air through the motor housing's openings into the channels and out the exhaust ports. The pulley side may include balancing bores for receiving balancing material to balance the finished assembly. An angular interference fit between the flywheel and motor shaft may also assist in balancing the finished assembly. A ventilation fan system may also be connected to the shaft at an end opposite the flywheel.
Owner:AMETEK INC
Force transmission device with a rotational speed adaptive damper and method for improving the damping properties
The invention relates to a force transmission device for power transmission between an input and an output, comprising at least an input and an output, and a vibration damping device disposed in a cavity that can be filled at least partially with an operating medium, in particular oil, the vibration damping device coupled with a rotational speed adaptive absorber, wherein the rotational speed adaptive absorber is tuned as a function of an oil influence to an effective order qeff, which is greater by an order shift value qF than an order q of an exciting vibration of a drive system.
Owner:SCHAEFFLER TECH AG & CO KG
Crankshaft decoupler
Owner:LITENS AUTOMOTIVE INC
Channel estimation apparatus and method for interference cancellation in mobile communication system
InactiveUS20070242782A1Pipe supportsAmplitude-modulated carrier systemsEstimation methodsMobile communication systems
Channel estimation apparatus and method for interference cancellation in a mobile communication system are provided. The channel estimation method includes detecting a preamble from a received signal and estimating a primary channel using the detected preamble; calculating a short-term correlation matrix using the primary channel; and estimating a secondary channel using the calculated short-term correlation matrix according to a certain channel estimation scheme.
Owner:SAMSUNG ELECTRONICS CO LTD
Starting apparatus
InactiveUS20120080281A1Reduce device sizeEasy to adjustRotary clutchesFluid gearingsElastomerEngineering
A starting apparatus including an input member coupled to a motor; a damper mechanism having an input element, an elastic body and an output element; a lock-up clutch mechanism for performing lockup where the input member is coupled to an input shaft of a transmission via the damper mechanism and for canceling lockup, and a dynamic damper including an elastic body and a mass body engaged with the elastic body. The mass body of the dynamic damper is an elastic body support member that is supported rotatably around an axis of the starting apparatus and that supports the elastic body of the damper mechanism. With this arrangement, the dynamic damper is easily adjustable while reducing the overall size of the starting apparatus.
Owner:AISIN AW CO LTD
Squeeze film damper with variable support stiffness
A squeeze film damper assembly having a variable stiffness and damping control. The squeeze film damper includes a damper chamber formed by two flexible bellows chambers of the sides. A first pressure source is applied to the damper chamber to regulate the damping. A second pressure source is applied to the flexible bellows chambers to vary the stiffness of the damper. The flexible bellows chambers are secured between an outer member and an inner member of the damper assembly and form the sealed damper chamber. A pressure ratio between the bellows chambers and the damper chamber can vary to control the stiffness of the squeeze film damper.
Owner:FLORIDA TURBINE TECH
Crankshaft decoupler
A decoupler assembly (20) is provided for transferring rotational torque between a drive shaft (16) and a drive belt (18) of an automotive engine. The decoupler assembly includes a drive hub (40) configured to be fixedly secured to the drive shaft. A pulley (22) is rotatably coupled to the drive hub (40) and adapted to be drivingly engaged with the belt (18). A spring shell (70, 100) is operatively coupled between the drive hub and the pulley for selective rotation therewith and a biasing member (130) is operatively coupled between the spring shell and the drive hub for isolating oscillatory vibrations between the drive hub and the pulley caused by rotation of the drive shaft. A clutch element (140) is seated between the spring shell (70, 100) and the pulley (22) for selectively transferring rotational torque from the drive hub to the pulley. The pulley (22) includes an inner clutch surface (26) and the clutch element includes a plurality of coils in frictional engagement with the inner clutch surface and an end coupled to the spring shell for expanding the coils against the inner clutch surface upon rotation of the spring shell with the drive hub to selectively transfer torque between the drive hub (40) and the pulley (22).
Owner:LITENS AUTOMOTIVE INC
Active tremor control
InactiveUS6234045B1Light weightConvenient and efficient transportationAiming meansRotary machine partsInertial massControl system
An active tremor control system for stabilizing against alternating perturbations includes: an inertial sensor for sensing angular motion about a first axis of an object induced by alternating perturbations; an inertial mass independent of the object; and an actuator coupled to the object and the mass and responsive to the inertial sensor for selectively applying a torque to the object representative of the sensed angular motion such that the angular motion about the first axis induced by the perturbation is cancelled, the actuator concurrently applying a reactive torque, equal and opposite to the to the applied torque, to the mass.
Owner:CHARLES STARK DRAPER LABORATORY
Torsional vibration damper
A torsional vibration damper on the bridging clutch of a hydrodynamic clutch arrangement has a first connecting device, which can be brought into working connection with the clutch housing and with a drive-side transmission element. The drive-side transmission element is connected via first energy-storage devices to an intermediate transmission element. The torsional vibration damper also has a second connecting device for establishing a working connection via second energy-storage devices between the intermediate transmission element and a takeoff-side transmission element, which is connected to a takeoff-side component of the hydrodynamic clutch arrangement. The intermediate transmission element accepts a mass element, located operatively between the two connecting devices.
Owner:ZF FRIEDRICHSHAFEN AG
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