414results about "Solid based dampers" patented technology

The invention specifically relates to a mass tuned vibration reducer used for controlling the vibration of an aerobridge in the airport, a large-span pedestrian bridge, a port trestle, high-rise buildings and the related structures. The mass tuned vibration reducer comprises a mass block, a spring, a damper and a base; wherein, the spring can be a spiral spring, a disc spring or a plate spring, and the end part of the spring is provided with a rigidity regulating device. The mass tuned vibration reducer can successfully realize the regulation on the natural frequency of a TMD system under the condition of needing not to assemble and disassemble the TMD since the end part of the spring is provided with the rigidity regulating device, so as to simplify the difficulty of regulation work, avoid the waste of manpower and materials and greatly reduce the construction cost. Meanwhile, the natural frequency and the damping of the system can be regulated in an optimized way under the condition of needing not to assemble and disassemble the TMD, thereby better exerting the vibration absorption performance of the mass tuned vibration reducer, ensuring safety and stableness of the pedestrians and vehicles on the large-span bridge and the thin and high building, contributing to prolonging the service lives of the thin and high building and the bridge, and having remarkable economic and social benefits.

The invention specifically relates to a mass tuned vibration reducer used for regulating the subsidence ratio of the vibration of the related structures. The mass tuned vibration reducer comprises a mass block, a spring, a damper and a base, and is characterized in that the damper is an adhesion-type damper formed by a damping cylinder, adhesive damping fluid and a piston, wherein, the piston and the adhesive damping fluid are arranged in the damping cylinder, and at least part of the piston is immerged into the adhesive damping fluid. The mass tuned vibration reducer adopts the adhesion-type damper formed by the adhesive damping fluid and the piston and can provide three dimensional damping, so as to effectively prevent side tumbling and ensure the vibration reducer realizes smooth actions; vibration mass is not needed to be provided with a special guide device, so that the mass tuned vibration reducer has reliable work and higher cost performance, and basically needs no maintenance. Meanwhile, the mass tuned vibration reducer realizes the aim of regulating the natural frequency and the subsidence ratio at any time, thus better exerting the vibration absorption performance of the mass tuned vibration reducer, ensuring stableness and safety of the pedestrians and vehicles on the large-span bridge and the thin and high building, contributing to prolonging the service lives of the thin and high building and the bridge, and having remarkable economic and social benefits.

A shock absorber system for use with a vehicle having a shield to reduce the effects of a shock event.

A composition which contains a mixture of a shear thickening fluid and at least one inert filler and said shear thickening fluid and filler remain in a conformable form.

Apparatus and methods for isolating and absorbing energy associated with shock forces that are exerted upon an object, such as the energy attendant to shock forces experienced during and immediately following a mild to severe impact. The apparatus generally having: (a) a housing defining an enclosure; (b) at least one segment of non-liquid material contained within the enclosure; and (c) a piston placed within the enclosure. When the shock or impact force is applied to either the piston or housing, the piston urges the non-liquid material to pass or extrude through an aperture, orifice, channel or slot located either within the piston or the housing. The non-liquid material passes or extrudes through the aperture, orifice, channel or slot in a direction that is generally transverse to the relative movement of the piston within the enclosure. The passage or extrusion of the non-liquid material through the aperture, orifice, channel or slot absorbs or dissipates at least a portion of the energy attendant to the shock or impact force.

The present disclosure relates to cushioning medallions, methods of making and methods of using, particularly cushioning medallions comprising a relatively low durometer viscoelastic polymer gel, for use on a bicycle seat.

The invention relates to a magnetorheological elastomer active and passive integrated damper based on an extrusion type stress, which belongs to the structure vibration isolation and control field, wherein a magnetorheological elastomer is arranged in a magnetic conductive sleeve; the upside of the magnetorheological elastomer is connected with a joint lever; the lower part of the magnetorheological elastomer is fixedly connected with a lower positioning plate; a groove is arranged on an outer circumferential surface of the magnetic conductive sleeve positioned in a permanent magnet, embedded with a coil winding and positioned and fixed by an upper positioning plate and the lower positioning plate; the permanent magnet, the upper positioning plate, the lower positioning plate and the lower part of the joint lever are arranged in an outer magnet isolating cylinder; the upside of the outer magnet isolating cylinder is provided with an upper end closure; the upper part of the joint lever extends out from a pylome of the upper end closure and is connected with a controlled object; a pretightening spring is sleeved on the joint lever; the bottom of the outer magnet isolating cylinder is provided with a lower end closure; a sensor is fixed on the joint lever and connected with a power amplifier through a control unit module; the power amplifier is connected with the coil winding through cables. The magnetorheological elastomer active and passive integrated damper has large bearing capacity, a simple structure and can be automatically suitable for active and passive vibration control and has wide application range.

Shock-absorbing, load-cushioning interface structure for use inside, and in operative cooperation with, the shell of a helmet for operative interposition such a shell and the head of a wearer. This structure is characterized with features and performances including (a) compression-deformation-and-slow-return viscoelasticity, (b) non-springy (anti-rebound) during a return from deformation, (c) acceleration-rate(strain-rate)-sensitivity, and (d) a durometer associated with an ILD number which is no less than about 15-ILD.

An operative hinge for use with an opening / closing body is provided which comprises a hinge case to be installed to a toilet bowl body for operating the opening / closing body; a shaft provided rotatably within the hinge case to support the opening / closing body; a stationary cam fixed within the hinge case and having formed therein a central through-hole through which the rotating shaft is axially penetrated; a cam provided within the hinge case and having formed therein a central through-hole through which the rotating shaft is axially penetrated to be slidable on, and rotatable with, the rotating shaft; and a resilient means for urging the rotatable sliding cam toward the stationary can, the hinge further comprising, to further positively control the rotation or the rotating means, a damping means consisting of a rubber ring fitted on the rotating shaft and interposed between the outer surface of the rotating shaft and the inner wall of the hinge case; and a viscous oil applied between the outer surface of the rubber ring and inner wall of the hinge case; the rubber ring having spiral recesses formed on the outer surface thereof.

An elastomeric tie rod end isolator or an elastomeric cartridge isolator that includes an outer metal sleeve defining a generally cylindrical socket, a generally cylindrical inner metal sleeve disposed coaxially within the socket in radially spaced relationship with the outer metal sleeve, and an elastomeric isolator disposed therebetween. The elastomeric isolator is a unitary annular body formed of an elastomer material and having a radially inboard surface in contact with the inner metal sleeve and a radially outboard surface in contact with the outer metal sleeve. The unitary elastomer body has a generally conical primary load-carrying section and a generally cylindrical secondary load-limiting section, each disposed coaxially about the axis of the socket. The load-limiting section includes a snubber gap formed by an axially extending groove. The annular unitary elastomeric body may be formed of an elastomer material having a relatively low damping characteristic and a relatively soft stiffness characteristic.

The present invention generally relates to a snubbing or damping system for reducing a shock impact on an isolated body within a shock sensitive device, which may take the form of an inertial measurement unit (IMU). The shock sensitive device includes a housing with an inertial body suspended in an isolated manner within the housing and engaged with the snubbing system. By way of example, the inertial body may take the form of an inertial sensor assembly. Further, the snubbing system may take the form of a plastically deformable snubbing mechanism positioned between the housing and the inertial body along a line of action of the inertial body during an acceleration (e.g. shock) event.

In the field of golf equipment, a new shaft design incorporates passive damping to suppress the vibrations excited in the shaft before and after impact. The design comprises a viscoelastic material sandwiched between multiple layers of composite plies which induce large shear strains in the viscoelastic when the shaft is subjected to bending, extension, or twist, thus increasing damping losses over conventional golf shafts. In one embodiment, the sandwiching layers are of opposing orientation. In another embodiment, the layers are oriented in an opposing V-shape laminate.

The invention relates to a hybrid energy dissipation vibration damping device which comprises a container, a particle system and viscous liquid. The particle system comprises solid particles, the viscous liquid can be a single type of liquid, or a plurality of types of liquid are mixed with one another to form the viscous liquid, and the viscous liquid is accommodated inside the container; the particle system is arranged in the viscous liquid, can float in the viscous liquid or can be sunken at the bottom of the viscous liquid; the viscous liquid can vibrate in the container. A function mechanism of the hybrid energy dissipation vibration damping device is similar to a function mechanism of a tuned liquid damper, the different types of liquid rub with one another to dissipate energy, structural restoring force is provided for lateral pressure of the container, and structural amplitude is reduced; the solid particles of the particle system are collided with one another and rub with one another in the container to dissipate energy; the viscous liquid rubs with the particle system or the particles to dissipate energy. The hybrid energy dissipation vibration damping device has the advantages that merits of a particle damper and merits of the tuned liquid damper are integrated in the hybrid energy dissipation vibration damping device, and the hybrid energy dissipation vibration damping device is superior to the traditional vibration damper with a single energy dissipation principle owing to various hybrid energy dissipation mechanisms for liquid-phase rubbing energy dissipation, solid-phase collision and rubbing energy dissipation, solid-liquid-phase rubbing energy dissipation and the like.

The invention relates to a vibration isolator that the rigidity and damp could be controlled. The damp medium is magnetic current variable material. It is made up of inner sleeve, out sleeve, magnetic current variable elastomer, inner coil winding, out coil winding, and reluctance circle. Cavities are set in the inner sleeve and the out sleeve. The cavity in the inner sleeve has inner coil winding, and the cavity in the out sleeve has out coil winding. The inner sleeve is column shape or circularity. The magnetic current variable elastomer is circularity and is located outside the inner sleeve. The out sleeve is circularity and located outside the magnetic current variable elastomer. The magnetic current variable elastomer, the inner sleeve, and the out sleeve have the same center. And the magnetic current variable elastomer is fixed to the inner sleeve and the out sleeve. Hatches are set on the surface that the inner sleeve and the out sleeve connect to the magnetic current variable elastomer. The reluctance circles are set in the hatches. The invention is simple structure and good reliability.

A component formed by an additive manufacturing process includes a body and a first vibration damper. The body is formed from an additive manufacturing material, and defines at least a first cavity completely enclosed within the body. The first vibration damper is disposed within the first cavity. The first vibration damper includes a flowable medium and a first solidified element formed from the additive manufacturing material. The flowable medium surrounds the first solidified element.

A vehicle shock absorber includes a housing, and a shock-absorbing member. The housing has at least one hollow formed therein, is formed of a rigid material, and is fixed to a bone structural member of vehicles. The shock-energy absorbing member is disposed in the hollow of the housing at least, and is formed of a super plastic polymer material. The super plastic polymer material exhibits a tensile breaking elongation of 200% or more, a yield strength of 20 MPa or more with respect to a predetermined strain, and a tensile elastic modulus of 400 MPa or more.

The invention discloses a three-cylinder type large-capacity magneto-rheological damper for vibration control of a large civil engineering structure, which comprises a magneto-rheological damping cylinder (9), a puddle damping cylinder (5), an auxiliary cylinder (19), a magneto-rheological main piston (23), a puddle piston (6), a piston rod (17), a sealing baffle (20), a damping channel (16), a cylinder cover (3) and a spherical hinge joint (13), wherein magneto-rheological liquid (11) is filled in the magneto-rheological damping cylinder, and an annular excitation coil (8) capable of generating a magnetic field is arranged in the magneto-rheological damping cylinder; and the puddle damping cylinder is arranged adjacent to the magneto-rheological damping cylinder, and elastic puddle (7) is filled in the inner cavity of the puddle damping cylinder, thus the damper can generate large damping under the condition of large displacement, and the safety of the damper can be improved. By arranging a displacement splitting mechanism (18), the magneto-rheological damper has high rigidity and large damping in a low-frequency region and has low rigidity and small damping in a high-frequency region. Compared with the traditional magneto-rheological damper with the same size, the maximum capacity of the damper of the invention is improved by more than one time, and the vibration control of the large civil engineering structure is more effective.

The invention provides a display panel. The display panel comprises a display module and a cover plate and also comprises a first buffer part, wherein the display module comprises an upper surface, a lower surface and four side edges, the upper surface and the lower surface are parallel to each other, the cover plate is arranged on the upper surface of the display module by an adhesive layer, the first buffer part at least covers two of the four side edges of the display module, and the two side edges which are covered extend and cover the lower surface of the display module. The first buffer part covers a side surface and a part of the lower surface of the display module, and thus, the phenomena that the display is externally collided and edge breakage and corner breakage are generated at corners during impact can be effectively prevented; and meanwhile, in electronic equipment employing the display panel, the contact stress between an enclosure of the electronic equipment and the display panel can be adjusted by the first buffer part, the vibration strength of the display panel is improved, the breakage risk is reduced, and the service lifetime of the display panel is prolonged.

In a variable damper using magneto-rheological fluid that comprises a cylinder (12) filled with the fluid, a piston (16) slidably received in the cylinder and including an inner yoke (32; 62; 126), an outer yoke (31; 64, 65; 140) and a coil (34; 130), a piston rod (13) having an inner end attached to the piston and an outer end extending out of the cylinder and a magnetic valve formed in a gap between the inner and outer yokes, at least one of the outer yoke and inner yoke consisting of at least two parts that are joined to each other in an axial direction. The two piece arrangement of the inner yoke or outer yoke allows the end plates to be omitted because the gap spacer can be installed without requiring end plates, and this contributes to a compact design and a favorable damping property. Also, the manufacturing and servicing of the damper can be simplified. When end plates (134) are used, the freedom in the positioning of the coil is increased.

A dampening device for use in a dampening system that operates to dampen and slow the movement of a closing door thereby reducing noise and the risk of injury, the dampening device including a piston and dampening apparatus that are moveable within a cylinder and an anchoring apparatus, the dampening device attached to various positions along a door frame or door panel.

An elastically deformable energy management arrangement includes a first component comprising a first surface and a second surface. Also included is a protrusion extending from the second surface of the first component and having an outer surface, the protrusion at least partially formed of an elastically deformable material. Further included is a second component in slideable engagement with the outer surface of the protrusion and spaced from the second surface of the first component.

A laminate material for damping a vibrational mode of a structure is provided, the laminate material comprising a viscoelastic layer and a stiff constrained layer adhered to the viscoelastic layer, wherein the viscoelastic layer is elastomer based and the constrained layer is made of steel, galvanized steel or aluminum. Furthermore, a damping arrangement for damping at least one vibrational mode of a structure is provided, comprising a laminate material having a soft viscoelastic layer and a stiff constrained layer, wherein the laminate material is provided in the form of at least two longish stripes, the soft viscoelastic layer of the at least two stripes being adhered to a surface of the structure, and the at least two stripes being oriented at an angle of 0° to 180°, preferably 90°, with respect to each other.

A passive damper for earthquake hazard reduction includes an inner member received in an outer member, with an elastomeric material disposed in the gaps between the inner and outer member. The elastomeric material has at least a first and a second portion. The first portion is bonded or connected to both the inner member and outer member such that no slippage occurs between the members and the material. The second portion is not bonded or connected to at least one of the inner and outer members such that slippage may occur.

A magnetorheological damper device is provided having an increased shear interface area per unit volume of the device, which enhances the stroking force of the damper. The damper generally includes a cylindrically shaped housing; a magnetorheological fluid disposed in the cylindrically shaped housing; a piston assembly disposed within the cylindrically shaped housing in sliding engagement with the cylindrically shaped housing defining a first chamber and a second chamber, wherein the piston assembly comprises a plurality of cylindrically shaped fluid passageways extending from the first chamber to the second chamber, and an electromagnet; and a power supply in electrical communication with the electromagnet.

A buffering device for use in conjunction with a downhole tool string, wherein the tool string includes a ballistics device. The buffering device includes a mandrel attached within a tool string and proximate to the ballistics device. An anchor is disposed on the mandrel and a disk plate is coaxially placed on the mandrel that is slideable thereon. The disk plate is proximate to the ballistic device. A resilient member, such as a spring, is coaxially placed on the mandrel between the disk plate and the anchor. The pressure wave produced by activation of the ballistic device pushes the disk plate toward the anchor and compresses the spring there between. Since the disk plate extends outward into sealing contact with casing lining the wellbore, compression of the spring dissipates energy waves produced by activation of the ballistic device.

Disclosed is a viscous fluid-sealed damper including a sealing container with a flexible membrane portion, and a viscous fluid sealed in the sealing container, and adapted to attenuate vibration transmitted between a supporting member and a supported member, the damper involving no deterioration in vibration preventing performance even if placed in an unfavorable position during transportation or storage after assembly to a disk device. A flexible membrane portion is formed of a rubber-like elastic composition containing a styrene-isobutylene-based block copolymer, and, more preferably, a mixture composition including a styrene-isobutylene-based block copolymer containing a styrene-based block and an isobutylene-based block, and a styrene-non-isobutylene-based block copolymer containing a styrene-based block and a non-isobutylene-based block.