Entries |
Document | Title | Date |
20090038899 | AUXILIARY HANDLE DEVICE - An auxiliary handle device, in particular for a hand-held power tool, has an auxiliary handle and a damping unit with at least one absorber mass element. The absorber mass element is designed in the shape of a sleeve along a main extension direction of the auxiliary handle device. | 02-12-2009 |
20090050428 | VIBRATION DAMPING AND HEAT TRANSFER USING MATERIAL PHASE CHANGES - A method and apparatus wherein phase changes in a material can dampen vibrational energy, dampen noise and facilitate heat transfer. One embodiment includes a method for damping vibrational energy in a body. The method comprises attaching a material to the body, wherein the material comprises a substrate, a shape memory alloy layer, and a plurality of temperature change elements. The method further comprises sensing vibrations in the body. In addition, the method comprises indicating to at least a portion of the temperature change elements to provide a temperature change in the shape memory alloy layer, wherein the temperature change is sufficient to provide a phase change in at least a portion of the shape memory alloy layer, and further wherein the phase change consumes a sufficient amount of kinetic energy to dampen at least a portion of the vibrational energy in the body. In other embodiments, the shape memory alloy layer is a thin film. Additional embodiments include a sensor connected to the material. | 02-26-2009 |
20090114492 | Hybrid Vehicle Driveline Noise Damper - A vehicle driveline includes a hybrid transmission, having a mass damper that provides noise and vibration damping over a broad range of frequencies. The damper provides damping at a desired frequency and all greater frequencies to act as a low pass filter for noise and vibration. A specific mass and inertia for the damper are selected to target the desired frequency range. Due to the hybrid design of the transmission the energy that is used to rotate the damper and provide the desired inertia is recovered by at least one motor/generator within the transmission during deceleration of the vehicle. | 05-07-2009 |
20090218185 | Resilient shock-absorbing device - A resilient shock-absorbing device includes an absorber body having top and bottom faces and including first and second absorber layers. The first absorber layer includes a plurality of juxtaposed resilient first outer tube halves heat-sealed to each other, and a plurality of first foam members filled respectively in the first outer tube halves. The second absorber layer includes a plurality of juxtaposed resilient second outer tube halves heat-sealed to each other, and a plurality of second foam members filled respectively in the second outer tube halves. The first and second absorber layers form respectively the top and bottom faces of the absorber body. Each of the first and second outer tube halves is made of a thermoplastic elastic material. Each of the first and second foam members has a segment-shaped cross section. | 09-03-2009 |
20100065390 | TUNED MASS DAMPERS AND VIBRATION ISOLATION APPARATUS - A tuned mass damper is provided for use with a structure that vibrates at a first axial surge mode and a second axial surge mode, when exposed to a predetermined frequency range. The tuned mass damper includes a housing, an endcap, two masses, and two springs. The first and second masses are disposed in a housing cavity. The first tuned mass damper spring is disposed in the cavity coupling the first mass and the endcap. The second tuned mass damper spring is disposed in the cavity coupling the first and second masses. The tuned mass damper has first and second resonant frequencies in the predetermined frequency range to damp the first and second axial surge modes, respectively. The second mass resonates at an amplitude that is greater than an amplitude at which the first mass resonates, when the two masses are subjected to the second axial surge mode. | 03-18-2010 |
20100089712 | PROJECTION ASSEMBLY AND LITHOGRAPHIC APPARATUS - A projection assembly includes a projection system to project a patterned radiation beam onto a substrate, a damping system to dampen a vibration of the projection system, the damping system including an interface damping mass and an active damping subsystem to dampen a vibration of at least part of the interface damping mass, the interface damping mass connected to the projection system, the active damping subsystem including a sensor to measure a position of the interface damping mass, an electromagnetic actuator to exert a force on the interface damping mass, and a controller to drive the electromagnetic actuator based on a signal provided by the sensor, the active damping subsystem including a reaction mass for the electromagnetic actuator to exert a counterforce upon based on the signal provided by the first sensor. | 04-15-2010 |
20100181156 | Electrostatic Device for Damping a Mechanical Vibration Movement of a Resonant Moving Object - An electrostatic device for damping a mechanical vibration movement of a moving object, the moving object being made of an electrically conductive material, the movement of the moving object having at least one parasitic vibration mode of frequency f | 07-22-2010 |
20100200347 | OIL CAVITY FOR PENDULUM ELEMENT (ROLLER) OF A CENTRIFUGAL PENDULUM - A centrifugal pendulum in a torsional vibration damper of a drive train of a motor vehicle with a pendulum flange rotating about a rotation axis and several pendulum masses distributed over the circumference, disposed on the latter in a manner capable of swinging. When the internal combustion engine of the drive train induces massive rotational irregularities resulting from high vibration angles in these arrangements, the pendulum masses can be deflected more strongly relative to the pendulum flange and strike the provided swing motion limits. To prevent hard hits of the pendulum masses on the pendulum flanges, it is proposed to dampen the impact areas by hydraulic means and hence to achieve a soft impact. | 08-12-2010 |
20100200348 | LIQUID DAMPER FOR REDUCING VERTICAL AND/OR HORIZONTAL VIBRATIONS IN A BUILDING OR MACHINE STRUCTURE - In a liquid damper for reducing vertical and/or horizontal vibrations in a building or machine structure, having at least two chambers ( | 08-12-2010 |
20100243392 | SYSTEM FOR DAMPING OSCILLATIONS IN A STRUCTURE - The system for damping oscillations in a structure according to the invention provides two masses that can be controlled to rotate at the frequency of oscillation of the structure and in opposite directions about axes of rotation transverse to the direction of the oscillations. The masses have individually controllable moments of inertia, and when their moments of inertia are equal a harmonic linear force is generated. The phases of the rotating masses can be individually controlled whereby the direction of the resulting harmonic linear force can be controlled. The moments of inertia can be controlled by shifting their centres of gravity relative to the respective axes of rotation. | 09-30-2010 |
20100307877 | ACTIVE VIBRATION-EXTINGUISHER CONTAINING MAGNETO- OR ELECTRORHEOLOGICAL FLUIDS, METHOD FOR REDUCING VIBRATIONS AND USES THEREOF - Present invention relates to a device for reducing vibrations of a vibrating object as well as a method for reducing vibrations, wherein the perturbing vibrations are reduced drastically by induction of counter-forces. In general, vibrations of equal frequency (counter-vibration) as the perturbing vibration are generated. The force generated by the counter-vibration acts onto the vibrating object, whose amplitude of vibration is to be reduced. The phasing of the counter-vibration is antipodal to the vibration to be reduced, preferably the force of the generated counter-vibration is greater than the force being necessary for compensation of the perturbing vibration. The transfer of the force of the counter-vibration onto the vibrating object is affected by means of a magnetorheological or electrorheological material, whereby the absolute value of the transmitted force is adjusted by the magnitude of an applied magnetical or electric field. With increasing strength of the magnetical or electric field, the magnetorheological or electrorheological material is stiffened increasingly. With optimal adjustments of the strength of the electric or magnetic field, the transmitted force equals the perturbing force and the perturbing vibration is compensated. | 12-09-2010 |
20100320045 | SYSTEM AND METHOD FOR TUNING THE RESONANCE FREQUENCY OF AN ENERGY ABSORBING DEVICE FOR A STRUCTURE IN RESPONSE TO A DISRUPTIVE FORCE - The invention is a system and method for automatically adjusting the resonance frequency of an energy absorbing device in response to a disruptive force. By configuring an energy absorbing device for automatic response tuning, utilizing a controller coupled to one or more sensors for processing a determination primarily based on sensing data, the natural period of an overall structure may be adjusted (i.e. increased or decreased) so that the acceleration response of the structure is decreased upon being subjected to a disruptive force, for example, high winds, a blast from an explosion, or a seismic force caused by an earthquake. | 12-23-2010 |
20110017561 | VIBRATION DAMPING APPARATUS - A vibration damping apparatus has a first looped rope member and a second looped rope member each having a loop portion formed of a rope member in a loop shape, the rope member being formed by twining a plurality of linear members. Further, the vibration damping apparatus has a first base member and a second base member disposed in an up-and-down of the first looped rope member. The first looped rope member is fixed to the first base member and the second base member with the loop portion standing up. The second looped rope member is fixed to an intersecting portion, in one of the first base member and the second base member, intersecting a fixing portion of the first looped rope member with the loop portion standing up. | 01-27-2011 |
20110079477 | Tuned vibration absorber mountable to aircraft skin panel - An apparatus and method for attenuating noise and vibration in a propeller aircraft comprises a tuned vibration absorber adapted to be mounted to the skin of a fuselage of a propeller aircraft. The tuned vibration absorber may be tuned to the second harmonic of a blade passage frequency of a propeller of the aircraft. The tuned vibration absorber may be connectable to a separately formed mount, which can be mounted to the fuselage skin independently of the tuned vibration absorber. The apparatus may include a cover to prevent interference between the tuned vibration absorber and other components in the aircraft. The apparatus may be used in combination with other attenuation systems to attenuate noise and vibration over a broad range of frequencies. | 04-07-2011 |
20110139559 | TORSIONAL VIBRATION DAMPER - A torsional vibration damper with a receptacle for several absorber masses pivotally held relative to the receptacle disposed around an axis of rotation in radial and circumferential direction. To be able to increase the mass of the absorber masses, the absorber masses have outside contours formed by several outside contour radii that remain within the receptacle over their entire swivel angle, and swivel over the entire swivel range near the outer circumference of the receptacle. | 06-16-2011 |
20110147150 | ATTACHMENT ARRANGEMENT FOR A REFRIGERANT COMPRESSOR - The invention relates to an attachment arrangement for vibration decoupling for a refrigerant compressor in motor vehicles. The refrigerant compressor is provided with a mounting opening, wherein a decoupling member made of a vibration damping material is arranged. In the decoupling member a fastening member in form of a hollow-cylindrical fastening sleeve is provided, which is rigid in axial direction. A fastening member axially penetrates the fastening sleeve, by force-closure connecting the fastening sleeve to a fastening point at the motor vehicle over a counterpart. The decoupling member is provided at the mounting opening on the end side in axial direction radially protruding in each case with a flange for form-closed accommodation of the refrigerant compressor. | 06-23-2011 |
20110162930 | Means for Isolating Rotational Vibration to Sensor - A rotational vibration isolator for a sensor is disclosed. The isolator comprises a first enclosure surrounding the sensor and a second enclosure surrounding the first enclosure, with a spherical gap between the enclosures. A fluid is supplied into this gap, the density of the fluid being sufficient to support the first enclosure in a condition of neutral buoyancy. The first and second enclosures are connected by springs of low spring constant. | 07-07-2011 |
20110186395 | CENTRIFUGAL PENDULUM VIBRATION ABSORBER - A centrifugal pendulum vibration absorber (CPVA) for absorbing torsional vibration created by operation of an engine includes a plurality of pendulums moveable with respect to a rotatable shaft. The pendulums are connected to the rotatable shaft by a plurality of pins that extend through apertures in the pendulum. The pendulums each move along a path defined by various drive line or powertrain parameters and characteristics. The path is implemented by contouring an active section of the apertures that engage the pins. | 08-04-2011 |
20110198174 | ADJUSTABLE SUSPENSION ARRANGEMENT FOR WIND TURBINE TOWERS - The present invention relates to a wind turbine tower suspension arrangement comprising magnetic attachment means adapted to magnetically secure the suspension arrangement to an inner surface portion of the wind turbine tower. The suspension arrangement further comprises guiding means adapted to guide an element suspended in a substantially longitudinal direction of the wind turbine tower, the guiding means being connected to the magnetic attachments means. Moreover, the present invention relates to the method for applying a wind turbine tower suspension arrangement. | 08-18-2011 |
20110290606 | VIBRATION DAMPING APPARATUS - An apparatus and method for damping vibrations within a physical object that is subject to vibration, such as for example, a railroad car running board. In one version, an enclosure is substantially filled with a granulated visco-elastic material, such as for example, granulated rubber, that is fixedly attached to the physical object. | 12-01-2011 |
20110303503 | Damping Device for Flat Components - The invention relates to a device ( | 12-15-2011 |
20120024648 | PORTABLE DEVICE - A portable device includes a curved base housing a motion sensor, a pendulum, and a motor. The pendulum slides inside the curved base in response to the tilting of the portable device to prevent the portable device from falling over. The motor may generate a torque to tilt the portable device. The motion sensor may detect a tilt angle of the portable device. | 02-02-2012 |
20120103739 | POUNDING TUNE MASS DAMPER WITH VISCOELASTIC MATERIAL - A vibration dampener, including, a first beam comprising a first mounting end portion and a first peripheral end portion, wherein the first peripheral end portion comprises a tunable mass, and the first beam is configured to vibrate in tune with a vibrational frequency of a structure supporting the first beam at the first mounting end portion, a second beam comprising a second mounting end portion and a second peripheral end portion, wherein the second peripheral end portion comprises a ring disposed about the first beam, and a viscoelastic material disposed between the first beam and the ring, wherein the viscoelastic material is configured to dampen vibrational energy as the first beam vibrates toward the ring until the viscoelastic material becomes compressed between the first beam and the ring during the course of the impact. | 05-03-2012 |
20120138401 | DAMPING DEVICE - A hexapod system for aligning an optical element in semiconductor clean rooms or in a vacuum, particularly in an illumination device for a microlithographic EUV projection exposure apparatus, comprises six hexapod supporting structures ( | 06-07-2012 |
20120145498 | BRAKING SYSTEM FOR A ZIP LINE - Improvements in a braking system for a zip line are presented. Braking occurs when a zip line rider makes contact with a braking carriage that slides along the zip line. The braking carriage pulls on a rope. The rope pulls on a length of chain in a chain reservoir to slide and lift the claim through the chain reservoir. The chain reservoir is an elongated tube that is mounted at an angle. As the zip liner moves further into the landing platform they lift a continuing greater amount of chain from the chain reservoir. The angle of the chain reservoir, coefficient of friction between the chain and the chain reservoir affects the pull-back. After the zip liner comes to a complete stop they remove the carriage from the zip line and gravity returns the brake mechanism. Minimum pull-back makes removal of the cable trolley easier. | 06-14-2012 |
20120152676 | SYSTEM AND METHOD FOR TUNING THE RESONANCE FREQUENCY OF AN ENERGY ABSORBING DEVICE FOR A STRUCTURE IN RESPONSE TO A DISRUPTIVE FORCE - The invention is a system and method for automatically adjusting the resonance frequency of an energy absorbing device in response to a disruptive force. By configuring an energy absorbing device for automatic response tuning, utilizing a controller coupled to one or more sensors for processing a determination primarily based on sensing data, the natural period of an overall structure may be adjusted (i.e. increased or decreased) so that the acceleration response of the structure is decreased upon being subjected to a disruptive force, for example, high winds, a blast from an explosion, or a seismic force caused by an earthquake. | 06-21-2012 |
20120168270 | CENTRIFUGAL-PENDULUM VIBRATION ABSORBING DEVICE - A centrifugal-pendulum vibration absorbing device, including a member attached coaxially with a rotary element; and mass bodies swingably coupled to the support member and disposed adjacent to each other in a circumferential direction. The mass bodies are configured such that when a first mass body, which is one of two mass bodies disposed adjacent to each other, and a second mass body, which is the other of the two mass bodies, move with respect to the support member so as to approach each other, the first mass body and the second mass body overlap each other as seen from an axial direction of the rotary element. | 07-05-2012 |
20120186925 | METHODS AND DEVICES FOR MITIGATING VIBRATION IN A DRIVE CARRIER - In certain embodiments, an apparatus includes a drive carrier that has a damping material positioned between an inertia weight and the drive carrier. In certain embodiments, a method includes attaching a damping material to a drive carrier and attaching a mass to the damping material. | 07-26-2012 |
20120199433 | VIBRATION-DAMPING SHEET, METHOD FOR DAMPING VIBRATION OF VIBRATING MEMBER, AND METHOD FOR USE THEREOF - A vibration-damping sheet includes a resin layer having a glass transition temperature of more than 100° C. and 140° C. or less, and a constraining layer laminated on the resin layer. | 08-09-2012 |
20120247896 | SLEEVE DAMPER ASSEMBLY - A damper for a linear element of a motor vehicle drivetrain such as a cable, a transmission oil fill tube or an engine oil dipstick tube constitutes a loose fitting sleeve or annulus disposed about the linear component. The damper may be positioned on a substantially vertical tube by a stop which may be any device such as a sleeve of material having an outside diameter larger than the inside diameter of the damper that is clamped or secured to the tube. Alternatively, the damper may be of sufficient length that one end may be clamped to the tube while the other end, which loosely fits on the tube, acts as a damper. The damper may be fabricated of a material such as closed cell foam or other relatively lightweight, resilient and compressible material. | 10-04-2012 |
20120261222 | FLYWHEEL ASSEMBLY FOR EXERCISE DEVICES - A flywheel assembly for exercise devices includes a flywheel. A first disc and a second disc sequentially received in the flywheel and securely attached to each other. A control plate is rotatably sandwiched between the first disc and the second disc. Multiple magnetic devices are respectively and radially connected to the control plate. A shaft centrally extends through the first disc, the second disc and the flywheel, and laterally mounted onto the second disc, wherein the flywheel is rotatable relative to the first disc, the control plate with the magnetic devices and the second disc. A drive device is laterally mounted onto the second disc for driving the control plate and adjusting the damping to the flywheel when the control plate is rotated relative to the first disc and the second disc due to the operation from the drive device. | 10-18-2012 |
20120285779 | Shape Memory Polymer Isolator for Downhole Electronics - Devices and methods for mounting and/or isolating members within housings. In described embodiments, a compressible shape memory polymer is used to provide this isolation. Particular embodiments are described wherein exemplary electronic circuit boards are disposed within carrier housings along with one or more protective spacers formed of shape memory polymer. | 11-15-2012 |
20130032442 | Fluid Inerter - The present invention relates to the field of inerters such as those used in vehicle suspension systems to control or counteract dynamic spring forces. The present invention arises from a surprising discovery, based on lab testing of another hydraulic suspension device, that the inertia of the fluid in a feed line has a very significant inertia effect, magnified by the ratio of the piston diameter to the line diameter to the 4th power. As a consequence, sufficient inertial reaction may be provided by the inertance of fluid alone and in the absence of a mechanical flywheel arrangement. Thus according to one aspect of the invention, there is provided an inerter ( | 02-07-2013 |
20130037362 | DAMPING AND INERTIAL HYDRAULIC DEVICE - A device for use in the control of mechanical forces. The device comprises first and second terminals for connection, in use, to components in a system for controlling mechanical forces and independently moveable ( | 02-14-2013 |
20130081914 | ACTIVE OSCILLATION DAMPER WITHOUT DIRECT ACCELERATION DETECTION - An active oscillation damper has a balancing mass which is movable relative to an oscillating mechanical structure. The control device then determines a compensation movement for the balancing mass based on a determined three-dimensional absolute motion of the mechanical structure. A balancing drive, arranged on the mechanical structure and acting on the balancing mass, is activated by the control device. The balancing mass is displaced by the balancing drive relative to the mechanical structure commensurate with the determined compensation movement. The measured values supplied to the control device include actual values of the balancing drive and/or a position of the balancing mass relative to the mechanical structure and/or at least one derivative with respect to time of the position of the balancing mass relative to the mechanical structure. The three-dimensional absolute motion of the mechanical structure is determined by the control device from the aforementioned values. | 04-04-2013 |
20130105262 | VIBRATION DAMPING APPARATUS | 05-02-2013 |
20130220752 | Vibration Absorber for Damping Mechanical Vibrations - The invention relates to a vibration absorber for damping mechanical vibrations of a structure capable of vibration at least in some portions. The vibration absorber comprises at least two rod-shaped vibrating elements, which each have a longitudinal axis, and a support module. The support module comprises at least two non-parallel support plates and an attachment device. In this case, for the purpose of attaching the vibration absorber to the structure, the attachment device is constructed in such a way that mechanical vibrations of the structure can be passed into at least a first of the support plates. The support plates are interconnected in such a way that the mechanical vibrations can be transferred from the first support plate to a second of the support plates. A first vibrating element is coupled at a first position along the longitudinal axis of the first vibrating element to the first support plate. | 08-29-2013 |
20130306420 | PIEZOELECTRIC LIQUID INERTIA VIBRATION ELIMINATOR - A tunable vibration isolator with active tuning elements having a housing, fluid chamber, and at least one tuning port. A piston is resiliently disposed within the housing. A vibration isolation fluid is disposed within the fluid chambers and the tuning ports. The tunable vibration isolator may employ either a solid tuning mass approach or a liquid tuning mass approach. The active vibration elements are preferably solid-state actuators. | 11-21-2013 |
20130319807 | SHOCK ABSORBER WITH INERTANCE - A damper, especially for a suspension of a vehicle. The damper provides a reactive inertia force in response to movement of a shaft. In some embodiments, there is also a piston providing viscous damping. In some embodiments, the shaft of the damper telescopes with an internal shaft. The internal shaft and a coupling member coact to convert linear motion of the external shaft to an internal rotary motion. | 12-05-2013 |
20140001000 | SNAP ON VIBRATION DAMPER | 01-02-2014 |
20140048368 | ACTIVE DAMPING SYSTEM FOR A SPRAY BOOM - A system comprising a spray boom including a pair of boom assemblies, means for measuring the position of the boom assemblies relative to the ground, a stabilising device mounted on each boom assembly for stabilising and damping vertical movement of the spray boom, activating means connected to the stabilising device, and computer controlling means, wherein the stabilising device is configured as a block movable on a track along the length of the boom assembly thereby displacing the centre of gravity of the spray boom, the activating means capable of moving the block along the boom assembly, the computer controlling means receiving information from the means for measuring the position of the boom assemblies relative to the ground on the vertical movement of the pair of boom assemblies, whereby the computer controlling means controls the vertical position of the stabilising device through the activating means in response to received information. | 02-20-2014 |
20140174868 | STRUCTURE OF STEERING WHEEL FOR VEHICLE - A vehicle steering wheel structure which, while having a configuration in which small damper masses are arranged in a distributed manner, can secure the same highly efficient vibration reducing effect as when a large damper mass is arranged, without increasing the required installation space and the cost. The vehicle steering wheel structure includes a plurality of damper masses arranged so as to be distributed in an inner region of a rim portion of a steering wheel; a connection member that connects these damper masses; and a damper module disposed in the inner region of the rim portion. | 06-26-2014 |
20140174869 | CENTRIFUGAL-PENDULUM VIBRATION ABSORBING DEVICE AND ORDER SETTING METHOD FOR THE SAME - A centrifugal-pendulum vibration absorbing device comprising having a support member coupled to a rotary element that is rotated by power from a drive device, and a mass body coupled to the support member so as to swing about a pendulum fulcrum and rotate about a center of gravity. An order of vibration of the mass body is determined on the basis of an order of vibration to be damped generated by the drive device in consideration of at least a rotational angle of the mass body about the pendulum fulcrum and a rotational angle of the mass body about the center of gravity. | 06-26-2014 |
20140182988 | SLEEVE DAMPER ASSEMBLY - A damper for a linear element of a motor vehicle drivetrain such as a cable, a transmission oil fill tube or an engine oil dipstick tube constitutes a loose fitting sleeve or annulus disposed about the linear component. The damper may be positioned on a substantially vertical tube by a stop which may be any device such as a sleeve of material having an outside diameter larger than the inside diameter of the damper that is clamped or secured to the tube. Alternatively, the damper may be of sufficient length that one end may be clamped to the tube while the other end, which loosely fits on the tube, acts as a damper. The damper may be fabricated of a material such as closed cell foam or other relatively lightweight, resilient and compressible material. | 07-03-2014 |
20140262656 | POUNDING TUNE MASS DAMPER SYSTEMS AND CONTROLS - A vibration dampener, including, a first beam comprising a first mounting end portion and a first peripheral end portion, wherein the first peripheral end portion comprises a tunable mass, and the first beam is configured to vibrate in tune with a vibrational frequency of a structure supporting the first beam at the first mounting end portion, a second beam comprising a second mounting end portion and a second peripheral end portion, wherein the second peripheral end portion comprises a ring disposed about the first beam, and a viscoelastic material disposed between the first beam and the ring, wherein the viscoelastic material is configured to dampen vibrational energy as the first beam vibrates toward the ring until the viscoelastic material becomes compressed between the first beam and the ring during the course of the impact. | 09-18-2014 |
20140360830 | ROTOR HUB VIBRATION ATTENUATOR - A vibration attenuator for an aircraft has at least one weight mounted in a rotating system of a rotor hub of the aircraft, each weight being rotatable about an axis of rotation of the hub relative to the hub and to each other weight. Drive means are provided for rotating each weight about the axis of rotation at a selected speed for creating oscillatory shear forces that oppose and attenuate rotor-induced vibrations having a selected frequency. A vertically oriented vibration attenuator is configured to oppose and attenuate vertical rotor induced oscillatory forces that would otherwise travel vertical down the rotor mast and into the airframe. A vibration attenuator having weights rotating about separate axes offset from each other. | 12-11-2014 |
20150053519 | METHOD FOR ASSEMBLING A PENDULUM-TYPE DAMPING DEVICE AND DAMPING DEVICE - A method for assembling a pendulum-type damping device ( | 02-26-2015 |
20150101901 | ANTI-VIBRATION DEVICE FOR VEHICLE - A vehicular antivibration device includes a torque rod and an actuator. The torque rod is connected at a first end to a vehicle body and connected at a second end to a vibration source. The actuator is disposed between the first end and the second end of the torque rod, includes an inertia mass supported on the torque rod, and causes the inertia mass to reciprocate in the axial direction of the torque rod. The actuator includes a coil, a magnetic core, a permanent magnet and a heat-conducting member. The magnetic core forms magnetic paths for the coil, and the coil is wound around the outer periphery of the magnetic core. The permanent magnet faces the inertia mass and is disposed on the magnetic core. The heat-conducting member is disposed so as to contact the coil and the torque rod. | 04-16-2015 |
20150292596 | CRANKSHAFT DAMPER - A crankshaft damper for a crankshaft is provided. The crankshaft damper includes a housing including a center opening configured to receive the crankshaft therein. The crankshaft damper includes a cover plate removably coupled to the housing. The housing and the cover plate enclose an annular chamber therebetween. The crankshaft damper further includes an inertia member disposed within the annular chamber. The cover plate includes an outer diameter surface located at an outer diameter thereof. The outer diameter surface defines an annular outer edge. The crankshaft damper further includes a plurality of outer through-holes formed as notches on the annular outer edge of the cover plate. Each of the plurality of outer through-holes extends inward along the outer diameter of the cover plate. Further, each of the plurality of outer through-holes receives a fastener therein to couple the cover plate to the housing. | 10-15-2015 |
20150308534 | ROTORCRAFT VIBRATION ISOLATION SYSTEMS - A rotorcraft vibration isolation system includes a plurality of liquid inertia vibration elimination (LIVE) units mounted on a first rotorcraft surface, an accumulator mounted on a second rotorcraft surface at a location that is remote from locations of the plurality of LIVE units, and a fluid passage to connect the accumulator to the plurality of LIVE units in parallel. The fluid passage has sufficient length to traverse between the location of the accumulator and each location of each LIVE unit. During rotorcraft operation, the second rotorcraft surface experiences lesser periodic vibration than the first rotorcraft surface. | 10-29-2015 |
20150321753 | CIRCULAR FORCE GENERATOR DEVICES, SYSTEMS, AND METHODS FOR USE IN AN ACTIVE VIBRATION CONTROL SYSTEM - Improved circular force generator devices ( | 11-12-2015 |
20150322614 | LAUNDRY TREATING APPLIANCE WITH DYNAMIC BALANCER - A dynamic balancer device for mounting to and balancing a rotatable drum in a laundry treating appliance comprises an enclosed non-metal annular housing having a radial circumferential wall, an annular metal race within the non-metal annular housing disposed against the radial circumferential wall, and a mass disposed in the annular race and movable therein. | 11-12-2015 |
20150323033 | METHOD AND APPARATUS FOR DAMPING VIBRATION OF POLES - A method and apparatus for providing effective damping of first mode vibration for a range of different types of poles is disclosed. According to a preferred embodiment, the apparatus includes a housing having a horizontal floor with an inward curved surface to form an enclosed chamber and at least one damping weight disposed in the inward curved surface and adapted to freely roll inside the enclosed chamber. Preferably, the apparatus is mounted on the top end of a pole for damping wind-induced first, second or higher mode vibration of the poles. | 11-12-2015 |
20150354791 | METHOD AND APPARATUS FOR DAMPING VIBRATION OF POLES - A method and apparatus for providing effective damping of first mode vibration for a range of different types of poles is disclosed. According to a preferred embodiment, the apparatus includes a housing having a horizontal floor with an inward curved surface to form an enclosed chamber and at least one damping weight disposed in the inward curved surface and adapted to freely roll inside the enclosed chamber. Preferably, the apparatus is mounted on the top end of a pole for damping wind-induced first, second or higher mode vibration of the poles. | 12-10-2015 |
20150377320 | VIBRATION DAMPING DEVICE - A vibration damping device in which a covering member can be fixed firmly to a rotary member by a rivet is provided. In the vibration damping device, a pendulum mass | 12-31-2015 |
20160131220 | Tuned Mass Damper - A tuned mass vibration damper included at least one damper mass and at least one guide component part to movably guide the at least one damper mass. The damper mass has a retaining component part which is at least partially arranged in a receiving recess of the damper mass. The retaining component part has at least one retaining structure and the at least one guide component part has at least one mating retaining structure to limit a movement of the at least one damper mass relative to the at least one guide component part in that the retaining structure and the mating retaining structure come in contact with one another. The at least one damper mass drives the retaining component part during a movement of the damper mass along a circumferential direction and to allow a relative movement of the retaining component part ( | 05-12-2016 |
20160169318 | TORSIONAL VIBRATION REDUCING DEVICE | 06-16-2016 |
20160169319 | TORSIONAL VIBRATION REDUCING DEVICE | 06-16-2016 |
20160169320 | TORSIONAL VIBRATION REDUCING DEVICE | 06-16-2016 |