21743results about "Shock absorbers" patented technology

An off-road bicycle suspension fork includes a pair of fork leg assemblies, each of the leg assemblies having an upper leg telescopingly engaged with a lower leg. A damping assembly is provided in at least one of the legs and includes a cartridge tube connected to the lower leg and a piston connected to the upper tube by a shaft. The piston is telescopingly engaged with the cartridge tube to define a compression chamber below the piston. A control assembly is located at a top portion of the upper leg and is in communication with the compression chamber via a central passage of the shaft. A reservoir is defined between at least a portion of the lower tube and the cartridge. During compression of the suspension fork, fluid flows from the compression chamber, upward through the central passage of the shaft, through the control assembly and to the reservoir.

A holding device for medical instruments, having a bracket on which at least one medical instrument can be affixed, at least one joint to position the bracket and a weight-relieving system to compensate the bracket load. The holding device is of compact and light structure and for cleaning purposes is completely autoclavable together with the bracket. The weight-relieving system is configured as a resetting element that is coupled with the bracket and is made of a material that essentially includes a plateau stress.

A self-pressurized damper, for example, a pressure-sensitive damper is described. At least one suspension spring is used to pressurize the damping fluid, a task typically carried out by a sealed moveable barrier, such as an internal floating piston (IFP) and a pressurized gas. Thus, stroke length may be maximized. Furthermore, the amount of compression damping force produced by the damper may be a function of the force generated by the at least one suspension spring.

The present invention relates to a variable-torque magnetorheologically actuated prosthetic knee which utilizes a plurality of interspersed and alternating rotors and stators to shear magnetorheological fluid in gaps formed therebetween. Advantageously, by operating in the "shear mode" there is substantially no or negligible fluid pressure buildup or change. Moreover, the multiple MR fluid gaps or flux interfaces desirably allow for the production of a large torque at low speed-eliminating the need for a transmission-and also for a wide dynamic torque range. One embodiment of the invention allows the rotors and / or stators to close the gaps therebetween to create a frictional torque component, thereby forming a "hybrid" braking system which provides a total torque or damping which is a combination of viscous torque and frictional torque.

A bicycle is disclosed having a control system with a user interface and an active suspension system. The control system includes a one or more sensors arranged to measure and transmit a signal indicative of the terrain over which the bicycle is being ridden. The active suspension system includes a valve box that is fluidly coupled to each chamber of the lower cylinder. An orifice in the valve box is changed in size in response to a signal from a sensor associated with the front wheel that changes the response of the suspension system due to changing terrain conditions. The user interface includes a selection device mounted to the handlebars that allows the user to change parameters of the active suspension system during operation of the bicycle.

Improved methods of controlling the stability of a vehicle are provided via the cooperative operation of vehicle stability control systems such as an Active Yaw Control system, Antilock Braking System, and Traction Control System. These methods use recognition of road surface information including the road friction coefficient (mu), wheel slippage, and yaw deviations. The methods then modify the settings of the active damping system and / or the distribution of drive torque, as necessary, to increase / reduce damping in the suspension and shift torque application at the wheels, thus preventing a significant shift of load in the vehicle and / or improving vehicle drivability and comfort. The adjustments of the active damping system or torque distribution temporarily override any characteristics that were pre-selected by the driver.

A damper including a valve movable between an open position and a closed position to selectively alter the compression damping rate of the shock absorber. The valve may include a self-centering feature that operates to keep the valve body centered about the valve shaft. The damper may also include a timer feature, which retains the valve in an open position for a predetermined period of time after it is initially opened.

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.

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.

A self-driving vehicle with an integrated fully-active suspension system. The fully-active suspension utilizes data from one or more sensors used for autonomous driving (e.g. vision, LIDAR, GPS) in order to anticipate road conditions in advance. The system builds a topographical map of the road surface. Suspension and road data is delivered back to the vehicle in order to change autonomous driving behavior including route planning. Energy storage is regulated based on a planned route. Forward and lateral acceleration feel is mitigated through active pitch and tilt compensation. The fully-active suspension pushes and pulls the suspension in three or more operational quadrants in order to deliver superior ride comfort, handling, and / safety of the vehicle.

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 present invention provides a method and system of displaying items that gives the user the ability to easily access recently accessed items. The recent items list includes both incoming and outgoing correspondences that are attempted to be matched to the corresponding contact stored in the device. The user can access the recent contact list and reply using any communication method available. For instance, the user could reply by phone, email, send an instant messenger message, send an SMS message, and the like. The recent items list may also include items such as communications, contacts, folder, files, messages, applications, and the like. A coalesced list of the recently used items is shown so that an item is only shown once in the recent list. Any matched item in the recent list may also be shown in the alphabetical list that appears below the recent list.

The present invention relates to a variable-torque magnetorheologically actuated prosthetic knee which utilizes a plurality of interspersed and alternating rotors and stators to shear magnetorheological fluid in gaps formed therebetween. Advantageously, by operating in the "shear mode" there is substantially no or negligible fluid pressure buildup or change. Moreover, the multiple MR fluid gaps or flux interfaces desirably allow for the production of a large torque at low speed-eliminating the need for a transmission-and also for a wide dynamic torque range. One embodiment of the invention allows the rotors and / or stators to close the gaps therebetween to create a frictional torque component, thereby forming a "hybrid" braking system which provides a total torque or damping which is a combination of viscous torque and frictional torque.

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. Various configurations of dual-goal energy absorption apparatuses using both VPEA and fixed load energy absorbers (FLEAs) that enable both shock mitigation and vibration isolation are disclosed. A semi-active control absorption system, comprising a VPEA and FPEA configured to work in series, is also disclosed.

An improved damping apparatus that utilizes a fluid having a viscosity that may be varied by the application of an electromagnetic field, such as a magnetorheological fluid or an electrorheological fluid, to provide the damping response. The damping apparatus includes a linear to rotary conversion mechanism which comprises a translatable member that is adapted for linear translation in a forward and a reverse direction and a rotatable member comprising a rotatable shaft that is rotatably coupled to the translatable member; wherein translation of the translatable member in one of the forward or the reverse directions produces a forward or a reverse rotation of the rotatable member and shaft, respectively. The damping apparatus also includes a damping mechanism which comprises a hub that is fixed to the shaft, a means for generating a variable electromagnetic field in response to an applied electrical signal that may be continuously varied in response to an input signal that is representative of a desired damping force and a fluid having a viscosity that may be continuously varied by application of the electromagnetic field that is in touching contact with the hub. Application of the variable electromagnetic field to the fluid produces changes in the viscosity of the fluid that in turn provides variable resistance to rotation of the hub and resistance to translation of the translatable member, thereby providing a damping apparatus with a continuously variable damping response.

A bicycle suspension assembly may be in the form of a bicycle front suspension fork. The suspension fork may include a pair of telescoping fork legs. In one arrangement, a suspension spring and a damper are provided in only one of the pair of fork legs. The suspension spring assembly may include a negative spring. In one arrangement, the negative spring is a dual stage negative gas spring in which a negative spring gas chamber includes a first chamber section and a second chamber section. The first chamber section and the second chamber section are uncoupled in a first position of the suspension spring and the first chamber section and the second chamber section are coupled in a second position of the suspension spring.

A bicycle shock absorber for differentiating between rider-induced forces and terrain-induced forces includes a first fluid chamber having fluid contained therein, a piston for compressing the fluid within the fluid chamber, a second fluid chamber coupled to the first fluid chamber by a fluid communication hose, and an inertial valve disposed within the second fluid chamber. The inertial valve opens in response to terrain-induced forces and provides communication of fluid compressed by the piston from the first fluid chamber to the second fluid chamber. The inertial valve does not open in response to rider-induced forces and prevents communication of the fluid compressed by the piston from the first fluid chamber to the second fluid chamber.

An off-road bicycle suspension fork includes a pair of fork leg assemblies, each of the leg assemblies having an upper leg telescopingly engaged with a lower leg. A damping assembly is provided in at least one of the legs and includes a cartridge tube connected to the lower leg and a piston connected to the upper tube by a shaft. The piston is telescopingly engaged with the cartridge tube to define a compression chamber below the piston. A control assembly is located at a top portion of the upper leg and is in communication with the compression chamber via a central passage of the shaft. A reservoir is defined between at least a portion of the lower tube and the cartridge. During compression of the suspension fork, fluid flows from the compression chamber, upward through the central passage of the shaft, through the control assembly and to the reservoir.

An integrated suspension system includes a cylinder that hermetically contains gas therein and is fixed to a vehicle body; a piston that has a motor at an upper portion thereof, is configured to support a road wheel and is guided within the cylinder to move vertically; a disk unit including a second disk that has a plurality of passage holes formed there through and a bottom surface coupled to a driving shaft of the motor to rotate while moving vertically integrally along with the piston, and a first disk that has a plurality of passage holes and is stacked on and connected via a hinge to the center of a top surface of the second disk to move vertically within the cylinder integrally along with the second disk without any rotation; and a control unit that controls an opening degree established through overlap of the passage holes formed in the first and second disks by changing power supplied to the motor to control a rotational angle of the second disk.

A miter saw is disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition. The blade is rotatable, and moves into a cutting zone to cut a workpiece. The predetermined action may be to stop the blade from rotating, to create an impulse against movement of the blade into the cutting zone, or to cause the blade to move away from the cutting zone.

Pressure-sensitive vales are incorporated within a dampening system to permit user-adjustable tuning of a shock absorber. In one embodiment, a pressure-sensitive valve includes an isolated gas chamber having a pressure therein that is settable by a user.

A gas turbine engine assembly includes a gas turbine engine mounted on a three-point mounting frame. The three-point mounting frame includes an engine support structure having first and second beams in a V-configuration, and a secondary support structure that is positioned about the engine support structure and has a rectangular footprint. The frame may include a Y-configuration that includes the V-configuration, and may be implemented in a machine mounting system, such as in a marine vessel.

A damper includes a piston rod, a damping piston, at least one cylinder containing a damping liquid, a fixed partition member for partitioning the interior of the damper into two liquid chambers, a pressure source, and a valve in communication with the pressure source which reacts as a function of the pressure. The valve can also be in communication with additional forces, such as mechanical spring forces, which can be adjustable. The valve can include a pressure intensifier. The valve generates fluid flow resistance during flow of liquid in a first direction through the partition member. The fluid flow resistance in the first direction varies according to the amount of force communicated to the valve by the pressure source and any additional forces. The partition member can include means for providing low-resistance return flow of liquid in a second direction.

A control system for a resilient support mechanism such as a suspension mechanism of a wheeled vehicle including a damper disposed between an unsprung mass member and a sprung mass member of the vehicle, wherein a damping coefficient of the damper is divided into a linear portion and a nonlinear portion, and wherein the nonlinear portion of the damping coefficient is defined as a control input u and applied with a frequency weight Wu(s), while a vertical velocity of the sprung mass member, a relative velocity of the sprung mass member to the unsprung mass member and a vertical acceleration of the sprung mass member are defined as an evaluation output zp and applied with a frequency weight Ws(s). In the control system, a nonlinear Hinfin control theory is applied to a generalized plant to obtain a positive definite symmetric solution P and to calculate a target damping force based on the positive definite symmetric solution P and a state amount such as the vertical velocity of the sprung mass member, a relative displacement of the sprung mass member to the unsprung mass member or the like.

A linear vibration motor comprising a movable unit, a base assembly having a coil assembly, a housing and an elastic member, in which the movable unit has the maximum mass from a fixed housing volume. The elastic member has the outer periphery fixed to the ceiling of the housing and the inner periphery fixed to the top of the movable unit opposed to the outer periphery. The elastic member is deformable to the extent that the outer and inner peripheries are shift to a coplanar position from a parallel position where they are spaced for a predetermined distance from each other. The core assembly is distanced downward from the movable unit or a predetermined gap.

An impact-absorbing protective structure comprises one or more compressible cells. Each cell is in the form of a thin-walled plastic enclosure defining an inner, fluid-filled chamber with at least one small orifice through which fluid resistively flows. Each cell includes an initially resistive mechanism that resists collapse during an initial phase of an impact and that then yields to allow the remainder of the impact to be managed by the venting of fluid through the orifice. The initially resistive mechanism may be implemented by providing the cell with semi-vertical side walls of an appropriate thickness or by combining a resiliently collapsible ring with the cell. After the initially resistive mechanism yields to the impact, the remainder of the impact is managed by the fluid venting through the orifice. The cell properties can be readily engineered to optimize the impact-absorbing response of the cell to a wide range of impact energies.

Electro-rheological fluid brake or actuator devices provide controllable resistance with or without inclusion of active torque output in either direction of rotation under manual or computer control. The brake and actuator devices are suitable for use in an orthotic device for a joint, such as the knee or elbow.

A torsional vibration damper having a hub carrying a radially projecting flange and an annular inertia mass defining an annular channel encompassing the radially projecting flange and an elastomeric member. An annular compression ring is attached to the opening of the annular channel to axially compress and extrude the elastomeric member to fill the annular channel around the radial flange within the inertia ring. Projections defining an intermittent annular inner rim of the inertia mass extend through openings between the spokes of the hub and cooperate with an annular outer rim of the inertia mass to retain the compression ring.

A method and apparatus for a suspension comprising a spring having a threaded member at a first end for providing axial movement to the spring as the spring is rotated and the threaded member moves relative to a second component. In one embodiment, the system includes a damper for metering fluid through a piston and a rotatable spring member coaxially disposed around the damper and rotatable relative to the damper.