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| Number | Title | Issue Date |
| 7992692 | Damper equipped with relative displacement detecting sensor The present invention relates to a cylinder which has hollow portion therein; a piston rod which is inserted through an upper side of the cylinder and has a groove pattern having plurality of convex portions and concave portions which are alternately formed; a pisto... | 08/09/2011 |
| 7628253 | Sensor module comprising acceleration sensor and relative displacement sensor, damper and electronically controllable suspension system comprising the same, and method of controlling vehicle movement using the same The present invention relates to a sensor module comprising a relative displacement sensor and an acceleration sensor, and a damper equipped with the same. The damper comprises a cylinder which is formed with a hollow portion therein; a piston rod which is inserted ... | 12/08/2009 |
| 7562750 | Air pressure proportional damper for shock absorber An air pressure proportional damper includes a first chamber and a second chamber. The first chamber is fluidly attached to the second chamber through an air adjustment valve. The air adjustment valve regulates flow from the first chamber to the second chamber in pr... | 07/21/2009 |
| 7308975 | Velocity sensing system for a damper A velocity sensor including a damper assembly having a central axis, a magnet extending parallel to the central axis, the magnet having a magnetic axis radially oriented with the central axis, and a coil extending parallel to the central axis and radially oriented w... | 12/18/2007 |
| 7280016 | Design of membrane actuator based on ferromagnetic shape memory alloy composite for synthetic jet actuator A membrane actuator includes a magnetically actuatable membrane and a magnetic trigger. The membrane includes a shape memory alloy (SMA), and the magnetic trigger is configured to induce a martensitic transformation in the SMA, to produce a larger force than would b... | 10/09/2007 |
| 7243763 | System comprising magnetically actuated motion control device A system that includes a magnetically actuated motion control device comprising a housing defining a cavity and including a slot therethrough. A movable member is located within the cavity and is movable relative to the housing. A magnetic field generator located on... | 07/17/2007 |
| 7234575 | Magnetorheological damper system A magnetorheological damper system comprising a reservoir in communication with a damper. The damper comprises a damper cylinder defining a damper chamber, wherein the damper chamber contains a magnetorheological fluid and a movable damper piston. The damper piston ... | 06/26/2007 |
| 7226056 | Electro-magnetic vehicle roll control system A system is disclosed for controlling the roll of a motor vehicle. The system comprises a selective lock connected between an unsprung portion of the vehicle and a sprung portion of the vehicle. ... | 06/05/2007 |
| 7219781 | Electromagnetic suspension system An electromagnetic suspension system comprises a universal joint mechanism for permitting radial movement of a cylinder relative to a center yoke while preventing axial movement of the cylinder relative to the center yoke. Since the cylinder is capable of radial mov... | 05/22/2007 |
| 7204035 | Displacement measuring system for a piston-cylinder assembly A piston rod is guided with freedom of axial movement in a cylinder, where the position of the piston rod is detected by a first position-measuring device, which travels along with the piston rod, and by a second position-measuring device on the cylinder side. The t... | 04/17/2007 |
| 7178423 | Noise and vibration damper for a vehicular driveshaft assembly A noise and vibration damper for use with a rotatable structure, such as a driveshaft assembly for a vehicular drive train system, includes an inner member, an elastomeric member that extends about the inner member, and an outer member that extends about the elastom... | 02/20/2007 |
| 7174244 | Suspension of a vehicle and method for controlling the same A vehicle suspension system is designed such that its equation of motion can be decoupled. Such a suspension system is provided with actuators, and the actuators are optimally controlled to reduce vibration of the suspension system. ... | 02/06/2007 |
| 7086441 | Hydraulic governor device for use with a rotational shaft, and door assembly including the same A hydraulic governor device for use with a rotational shaft of a door assembly for controlling a rotation of said rotational shaft. The device includes a sleeve; first and second end coverings mounted respectively onto first and second ends of the sleeve so as to de... | 08/08/2006 |
| 7070028 | Frequency dependent damper A gas shock absorber has a pressure tube which defines a working chamber. A piston divides the working chamber into an upper working chamber and a lower working chamber. A flow path extends through the piston to provide fluid communication between the upper and lowe... | 07/04/2006 |
| 7046509 | Computer controlled display device The present invention is a computer controlled display device. In one embodiment, the display device includes a flat panel display having an input for receiving display data. Additionally, a moveable assembly may be coupled to the display. The moveable assembly may ... | 05/16/2006 |
| 7007563 | Monitor to check the path of motion of reciprocating piston A stationary arranged sensor (4) is provided in the region of one of the dead centers of the piston movement to monitor the position of the path of motion of a piston (1) relative to a cylinder (2) whereby the sensor (4) measures the late... | 03/07/2006 |
| 7004291 | Torsional active vibration control system A method for damping torsional vibrations in a rotating shaft. The method includes coupling an actuator to a shaft; rotating the shaft; determining an amount of torsional vibration in the shaft; and controlling the actuator in response to the amount of torsional vib... | 02/28/2006 |
| 6953187 | Elastomer spring especially for rail vehicles An elastomer spring, particularly for rail vehicles, comprises a core made of metal or plastic; an outer sleeve that also consists of metal or plastic; a cushion made of elastomer material, in the form of a layered spring that is arranged between the core and the ou... | 10/11/2005 |
| 6951341 | Stabilizer for a motor vehicle The invention relates to a stabilizer for a motor vehicle. Known one-piece stabilizers are designed either solely for operation in road traffic or solely for off-road operation. Two-piece stabilizers that comprise an engaging and disengaging clutch have disadvantage... | 10/04/2005 |
| 6913126 | Impact damper An impact damper for deceleration of a vehicle impacting on all obstacle by hydraulic damping forces and gas spring forces includes at least inner and outer pipes telescopically displaceable one inside the other and defining an annular space therebetween with a base... | 07/05/2005 |
| 6868946 | Method for controlling the damper current for an electrically adjustable damper A method controls the damper current of a damper of a motor vehicle. The damper is adjustable by an electrical current and the permissible change of the current per time interval is delimited by a limit. ... | 03/22/2005 |
| 6866127 | Piston damper assembly, and dust tube subassembly, having a velocity sensor A piston damper assembly includes a piston damper and a relative velocity sensor. The piston damper includes a damper body, a piston rod, and a dust tube which is attached to the piston rod. The relative velocity sensor includes an axially extending first magnet sup... | 03/15/2005 |
| 6808051 | System and method for active vibration isolation and active vibration cancellation The invention relates to a system and method for vibration isolation and cancellation, especially but not exclusively suited for a damper in wafer-chip production equipment. Active vibration isolation and cancellation technology (or air mount technology) for chip pr... | 10/26/2004 |
| 6745876 | Piston-cylinder assembly A piston-cylinder assembly includes a cylinder, in which a piston rod with a piston is guided axially by a piston rod guide. A distance detection system is used to determine the position of the piston in the cylinder. The distance detection system includes a sensor ... | 06/08/2004 |
| 6698558 | Safety brake system for garage doors A brake system for garage doors including a piston assembly movable within a longitudinal housing assembly and including a central through opening and a threaded bushing rigidly mounted to the piston assembly. A threaded axle is cooperatively received by ... | 03/02/2004 |
| 6298293 | Kinetic state quantity estimating device and method for motor vehicle A speed (Zw'-Zb') and an amount (Zw-Zb) of displacement of a wheel relative to a vehicle body are estimated with the aid of an observer, based on a vertical acceleration Zb" of the vehicle body detected by a sensor. In this observer, a non-linear componen... | 10/02/2001 |
| 6298294 | Device for controlling suspension shock absorbers of vehicles based upon phantom substitute therefor A device for controlling damping coefficients of shock absorbers (22FL, 22FR, 22RL, 22RR) of a four wheeled vehicle constructs a phantom damping system composed of a phantom side shock absorber (122, 122F, 122R) disposed vertically at a lateral inside of ... | 10/02/2001 |
| 6293530 | Compressible liquid vibration control system A vibration control system utilizes a liquid spring filled with a compressible liquid. In its most general embodiment, the vibration control system minimizes the transmission of vibration between a first mass and a second mass, i.e vehicle frame/vehicle c... | 09/25/2001 |
| 6206152 | Vibration damper with variable damping force A vibration damper with variable damping force, including a cylinder, in which a piston with a piston rod is arranged in axially movable fashion, whereby an adjustable damping valve is activated in dependence on the deflection distance and the activation ... | 03/27/2001 |
| 6138967 | Foot structure for apparatus A foot structure for an apparatus including a two part bolt member and a slide cup. The bolt member first part is fixed to the apparatus and the second part loosely engages the first part, with an elastic member therebetween. The slide cup has, at an uppe... | 10/31/2000 |
| 6109400 | Impact absorber An impact absorber for decelerating a vehicle during a collision with an obstacle by hydraulic damping forces and pneumatic spring forces includes two tubes that are telescopically displaceable one inside the other. An internal tube of the two tubes is cl... | 08/29/2000 |
| 6053291 | Damper of a type with a variable damping force A small-sized damper is provided which enables to effectively vary the damping force of a damper even in a region in which the moving speed of a rod is small. On one of a damper main body and a rod which is inserted into the damper main body, there are mo... | 04/25/2000 |
| 6053488 | Spring damper device between a wheel and the body of a motor vehicle A spring damper device is arranged between a wheel and a body of a motor vehicle. A damper cylinder and a piston rod co-operates with the latter. The damper device is directly articulatable between the body of the motor vehicle and a guide element of the ... | 04/25/2000 |
| 5979616 | Tilt control apparatus for vehicles A device for sensing the angular or turning movement of a moving vehicle is disclosed. At a pre-set point in the turn, the sensing device will provide a signal to the suspension system to change from "soft" to "stiff" suspension and thus prevent any furth... | 11/09/1999 |
| 5979885 | Damping coefficient control apparatus for damping mechanism in vehicle suspension system A damping coefficient control apparatus for a damper device in a suspension mechanism disposed between a sprung mass and an unsprung mass of a wheeled vehicle, wherein an absolute vertical movement velocity of the sprung mass is detected in an absolute sp... | 11/09/1999 |
| 5950776 | Apparatus and method for controlling damping force characteristic of vehicular shock absorber An apparatus and method for controlling damping force characteristics of respective vehicular shock absorbers in which vehicular vertical behavior(s) at the position(s) of the vehicular body which are forward by a predetermined distance from a tread of re... | 09/14/1999 |
| 5924703 | Suspension control apparatus The present invention provides a suspension control apparatus including dither amplitude setting device which is adapted to set the amplitude of the dithering current to be superimposed on the command current is set to a small value in a region in which a... | 07/20/1999 |
| 5924528 | Load depending damping assembly A shock absorber having variable damping characteristics for damping the movement of the body of an automobile is disclosed. The shock absorber includes a variable flow control valve which modulates the rate of fluid flow between the upper portion of the ... | 07/20/1999 |
| 5884921 | Electric control apparatus for damper device in suspension system of automotive vehicle An electric control apparatus for a damper device in a suspension system of an automotive vehicle, wherein absolute velocity of a sprung mass of the vehicle and relative velocity of the sprung mass to an unsprung mass of the vehicle in vertical movement a... | 03/23/1999 |
| 5814964 | Stepping motor driving method A method of driving a stepping motor operable on a control signal having a predetermined number of excitation patterns switched in a predetermined sequence during each excitation cycle to rotate, at a predetermined angle defined by two stop positions, thr... | 09/29/1998 |
