4999 results about "Vibration isolation" patented technology

A power toothbrush including a handle and a brush head with bristles. In one embodiment, the toothbrush includes vibratory means for causing the brush head and the bristles to vibrate, and vibration isolation means for reducing the transfer of vibrations from the vibratory means to the handle. The vibratory means can include an eccentric motor positioned in the brush head or the brush shaft of the toothbrush. Vibration dampening material can be included in the vibration isolation means to reduce the transfer of vibrations to the handle.

An adaptive energy absorption system for a vehicle seat is disclosed, utilizing an adaptive energy absorber or variable profile energy absorber (VPEA) for mitigating occupant injury due to extreme vehicle movement (e.g., during a vehicle shock event), and/or for mitigating vibration experienced by an occupant of the vehicle seat during normal vehicle operating conditions. The adaptive energy absorption system achieves the aforementioned objectives for a wide range of occupant weights and load levels. An alternate configuration of a dual-goal energy absorption system is also disclosed that enables both shock mitigation and vibration isolation.

A methodology for designing structured metamaterials that can reflect, absorb and focus the propagation of both scalar acoustic and vector elastic waves is described. Three exemplary representative inventions based on the disclosed invention are described, illustrating i) compact ultra-wide broadband isolation, ii) sub-wavelength gaps and negative index propagation utilizing a single material platform, and iii) a fundamentally new method of producing multiple high frequency spectral gaps. Such metamaterial designs possess a wide range of potential applications, ranging from but not limited to, isolating an entity from external mechanical or acoustical vibrations, compact focusing lenses as well as cascaded high frequency filters for wave shaping and nonlinear wave propagation control.

A tooth brushing system adapted to simultaneously clean a set of maxilla teeth or a set of mandible teeth. The system comprises a vibration inducer, a controller for the vibration inducer, a power source and a handle adapted to enclose the vibration inducer, the controller for the vibration inducer and the power source. The system further comprises a plurality of brushes adapted to simultaneously contact the set of maxilla teeth or the set of mandible teeth, a vibration isolation plate integral with the handle and a vibration transfer plate connected to the vibration inducer and the plurality of brushes and releasably connected to the vibration isolation plate, wherein the handle is adapted to be effectively held within a hand of a user and the vibration isolation plate is adapted to isolate vibration from the set of maxilla teeth or the set of mandible teeth not contacted by the plurality of brushes.

A battery pack has a unit cell packaged by a package material of a laminate type, an outer case which accommodates the unit cell therein, and a vibration isolation device which attenuates vibrations inputted to the outer case and transmitted to the unit cell by pressing one side surface of the unit cell. The vibration isolation device is disposed between the unit cell and the outer case, and includes a first press structure which presses the one side surface of the unit cell. The first press structure is constituted by connecting one surface of the outer case, the one surface facing to the one side surface of the unit cell, and a press plate abutting against the one side surface of the unit cell with an elastic member interposed therebetween.

A tunable vibration isolation device comprising a magneto-rheological elastomer (MRE), and methods of using such a device, are provided. By manipulating a magnetic field within the MRE the device's stiffness is controlled. The vibration isolator can be constructed to provide shock absorption in one, two and three dimensions. Coupling the tunable device to a sensor feedback and a control system provides fast and accurate vibration isolation and energy dissipation for shock events in a variety of applications.

The invention discloses a damping-adjustable vibration isolation platform with quasi-zero stiffness. The damping-adjustable vibration isolation platform comprises a bearing assembly, a fixed platform frame and damping assemblies. The bearing assembly is used for bearing vibration isolation objects. The fixed platform frame is provided with an open end and a cavity which is communicated with the open end, and the bearing assembly and the damping assemblies are contained in the cavity. The damping assemblies comprise the damping-adjustable upper damping assembly and the damping-adjustable lower damping assembly which are arranged in the cavity in the longitudinal direction, and the bearing assembly is connected with the fixed platform frame through the upper damping assembly and the lower damping assembly. The vibration isolation platform solves the difficulty existing when a traditional linear vibration isolation system isolates low frequency or ultra-low frequency vibration, and also overcomes the defects that an active or semi-active control vibration isolation device is complex in structure, high in manufacturing cost, high in energy consumption and the like; the vibration isolation platform is simple in structure, applicable to wide-frequency-domain vibration isolation, capable of being widely applied to precise equipment with strict vibration isolation requirements and has good engineering adaptability. Besides, damping is simple and convenient to adjust.

A bone conduction device, including a bone fixture adapted to be fixed to bone, a vibratory element adapted to be attached to the bone fixture and configured to vibrate in response to sound signals, and a vibration isolator adapted to be disposed between the vibratory element and the bone.

The invention discloses a parallel mechanism based multidimensional vibration platform. Standard zero stiffness of a vibration isolation platform at the equilibrium position and nonlinear stiffness nearby the equilibrium position can be realized by setting certain structural parameters, and the problem about difficulty in isolating low-frequency or ultra-low-frequency vibration for a traditional linear vibration isolation system; stiffness and damping can be easily and conveniently adjusted, vibration isolation of broad frequency domains are satisfied, and good engineering applicability is achieved; the multidimensional vibration platform is high in bearing stiffness, low in movement stiffness, small in static deflection, low in dynamic inherent frequency and good in vibration isolation effect; inherent contradictions restricting the traditional vibration isolation system, namely the contradictions of low-frequency vibration transmissibility and high-frequency vibration attenuation, can be solved by flexible adjustment of the stiffness and damping; the height and the static equilibrium position of the entire platform can be changed by adjusting a shock absorber spring base in height, and the multidimensional vibration platform is applicable to vibration isolation of objects of different weight.

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.

A hair drying apparatus includes a body defining an air inlet, an air outlet and an air flow path therethrough. An impeller generates a flow of air from the air inlet, through the air flow path and to the air outlet. A motor drives the impeller and a heating element heats air flowing through the air flow path. The heating element, motor and impeller are supported within the body. A handle is mounted to the body and a housing is at least partially surrounded by the body and at least partially surrounds the air flow path. The motor is supported within the housing. At least one vibration isolation member is located between an inner surface of the body and an outer surface of the housing.

The invention discloses a precise leveling system of a vibration isolation foundation bed. The lower bottom surface of the vibration isolation foundation bed is supported by air springs; a precise optical vibration isolation platform is arranged on the vibration isolation foundation bed; one or two level monitors are arranged on the precise optical vibration isolation platform for measuring an included angle between the vibration isolation platform and the absolute level in two mutually vertical directions; flexible leg monitoring devices are respectively connected with the own air springs; the output ends of the level monitors and the flexible leg monitoring devices are respectively connected with the input ends of controllers; the output ends of the controllers are connected with all control valves; an air channel port of each control valve is respectively connected with the own air spring; air supplying devices respectively supply air for each control valve. The precise leveling system realizes vibration isolation of Grade II; the vibration isolation platform has highly precise planarity and meets requirements of various precision instruments for the environment; the control valves realize the air inflow of a small amount during the charging process of the air springs, improve leveling precision and can keep the system stable. The precise leveling system is applicable to ultra precise measurement and processing.

A suspension for a seat that varies the preload, spring rate and damping rate of the suspension in direct proportion to the suspended weight of an occupant of the seat to provide the same effective vibration isolation for any occupant. The suspension includes an actuating mechanism engaged with a first spring and a pivotal transfer link that is engaged with a second spring and a non-adjustable rate damper that are each fixedly attached to the seat opposite the transfer link. The transfer link is engaged with a weight adjustment mechanism which operates to adjust the position of a pivot pin for the transfer link with respect to the transfer link, such that the preload, spring rate and damping rate of the suspension are adjusted in proportion to the weight of the occupant of the seat to provide similar ride dynamics to any occupant of the seat.

The invention discloses a hydraulic vibration active isolation platform which comprises an upper platform, a lower platform, a two-degree-of-freedom hook joint, a three-degree-of-freedom hook joint and a hydraulic active actuating rod. According to the invention, since the two-degree-of-freedom hook joint and the three-degree-of-freedom hook joint are designed by adopting a pre-tightening anti-backlash technology, the hinge gap is eliminated and the motion accuracy of the hydraulic vibration active isolation platform is much higher. Based on the isolation platform, an active isolation platform with six-degree-of-freedom large-range vibration isolation capability is provided for the application field of vehicle mounted or onboard optical observation and laser aiming and other technologies, so that the disadvantage that the low-frequency large amplitude vibration is hardly isolated by the traditional isolation platform is overcome.

The invention provides an engine vibration isolation system which is based on a combination suspension and a control method, relating to the automatic control technical field. The invention forms the combination suspension by a plurality of passive rubber elastomers and a single controllable magneto-rheological damper which is obliquely arranged between the middle part of the engine and a base; an acceleration sensor and a force sensor respectively extract the vertical and transverse vibration acceleration of the engine body and the vertical vibration force of the base, so as to calculate the vibration excitation frequency and the transverse vibration speed of the engine; an engine vertical vibration isolation fuzzy control rule and a transverse damping state control rule are established in a controller, and an oblique control force of the magneto-rheological damper is calculated; the driving current of the magneto-rheological damper is determined by an oblique control force, the damping force of the combination suspension is adjusted in real-time, the transmission of the vibration energy of the engine is restricted. The invention can lead to effective vibration isolation of the engine in wide-frequency range, reduces the self vibration of the engine, and improves the durability and the riding comfort of a carrier.

The invention discloses a load-bearing adjustable zero-stiffness electromagnetic vibration isolator and a control method thereof. An electromagnetic spring of the vibration isolator in the perpendicular direction is composed of three permanent magnets and two groups of controllable direct current electromagnets, two magnets have opposite polarity and generate repulsive force, and stiffness of theelectromagnetic spring can be adjusted by changing and controlling current. An electromagnetic spring of the vibration isolator in the horizontal direction is composed of two groups of symmetrically distributed electromagnetic springs, and stiffness of the electromagnetic spring can be adjusted by changing and controlling current. When the system load-bearing weight is changed, the stiffness of the perpendicular electromagnetic spring and the stiffness of the horizontal electromagnetic spring are led to meet a certain proportional relationship by adjusting and controlling current so that stiffness of the system at the balance position can be zero. When a vibration isolation device is in small vibration near the balance position, dynamic stiffness is very small, and natural frequency of the whole system is very low so that the vibration isolator can achieve wide-range frequency vibration isolation and has good low frequency vibration isolation effect. In addition, the vibration isolator is compact in structure, light in weight and convenient to control.

A flexible heat pipe is disclosed for use with evaporator and condenser elements for removing heat from electronic components. The flexible heat pipe comprises a bellows member fixed at one end to a condenser member and at an opposite end to an evaporator member. A cable artery is disposed within the bellows and is fixed at one end to the evaporator, and slidingly engages the condenser at the opposite end. The bellows acts as a flexible vapor envelope, and the cable artery acts as a flexible wick for directing condensed working fluid from the condenser back to the evaporator. The sliding connection between the cable artery and the condenser allows relative axial movement, and the inherent flexibility of the cable artery allows relative lateral movement. Thus, the condenser and evaporator can move in all directions with respect to each other, which can provide desired vibration isolation of the two components.

A shale shaker or vibratory separator which, in one aspect, has a base, vibration isolation apparatus on the base, a basket, mount apparatus for mounting the basket on the base, and at least one of the base, basket, and the mount apparatus made of, encased in, or coated with composite material which, in certain aspects, is all or part flexible composite material; and methods of using such separators and shakers.