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| Number | Title | Issue Date |
| 7997394 | Damping force adjustable fluid pressure shock absorber A piston coupled to a piston rod is fitted in a sealed cylinder in which oil is contained. During an extension stroke of the piston rod, a damping force is generated by an extension-side valve body, and at the same time, a valve-opening pressure of an extension-side... | 08/16/2011 |
| 7757826 | Damping force adjustable fluid pressure shock absorber A first piston and a second piston coupled to a piston rod are fitted in a cylinder, and an intermediate chamber is formed between the first and second pistons. A compression-side check valve and an extension-side check valve are provided at the first piston and the... | 07/20/2010 |
| 7306207 | Method and system for adjusting internal pressure of gas lifter using angle sensor A method and system for adjusting internal pressure of a gas lifter includes measuring a variable opened angle of an openable object, such as a hood, a trunk lid or a tailgate, using an angle sensor, and adjusting the internal pressure of the gas lifter according to... | 12/11/2007 |
| 7293633 | Controlled damper assembly with isolated electrical connection A controlled damper assembly includes a controlled-damper-assembly piston, a controlled-damper-assembly piston rod attached to the piston, an insulated wire, and an electrical connector. The insulated wire is positioned in the piston rod, has a first end operatively... | 11/13/2007 |
| 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 |
| 7172058 | Vibration damper with amplitude-dependent damping force Vibration damper with amplitude-dependent damping force includes a cylinder, in which a piston rod, carrying a piston, is guided with freedom of axial movement, where the piston divides the cylinder into a working space on the piston rod side and a working space on ... | 02/06/2007 |
| 7128192 | Inertia valve shock absorber 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 sh... | 10/31/2006 |
| 7066307 | Hydraulic dashpot for motor vehicles A hydraulic dashpot for motor vehicles, with a cylinder and a primary piston. The cylinder (1) is charged with shock-absorption fluid. The primary piston (2) is mounted on the lower end of a piston rod (8) and partitions the cylinder into two ch... | 06/27/2006 |
| 6918473 | Stroke dependent bypass A shock absorber has a pressure tube with a piston assembly slidably disposed within the pressure tube and attached to a piston rod. The piston assembly divides the pressure tube into an upper working chamber and a lower working chamber. The piston assembly includes... | 07/19/2005 |
| 6915885 | Oscillation damper with adjustable damping force Oscillation damper with variable damping force, comprising a valve device, in which an actuator for adjusting the valve device performs a rotary motion against the spring force of a torsion spring, the position of the valve device being determined from the manipulat... | 07/12/2005 |
| 6913128 | Piston-cylinder assembly having a speed-dependent damping force A piston rod is guided in an axially movable manner within a cylinder filled with a damping medium, and a piston is arranged on the piston rod, which piston divides the cylinder into a working space on the piston-rod side and a working space remote from the piston r... | 07/05/2005 |
| 6871731 | Adjustable shock absorber for a motor vehicle An adjustable shock absorber (8) includes a damping force changing device (16) which continuously adjusts the damping force characteristic of the shock absorber in response to input control signals. A first signal is generated by a first sensor which r... | 03/29/2005 |
| 6860369 | Vibration damper with variable damping force A vibration damper with variable damping force, includes a cylinder filled with damping medium and in which a piston fastened to a piston rod axially moveably therein. The piston divides the working cylinder into two working spaces. The damping force for the directi... | 03/01/2005 |
| 6817454 | Damping force control type hydraulic shock absorber A piston connected to a piston rod is slidably fitted in a cylinder having a hydraulic fluid sealed therein. First and second poppet valves having different valve opening characteristics are provided in first and second extension main passages, respectively. A pilot... | 11/16/2004 |
| 6749045 | Passive force element on the basis of electrorheologic liquids A passive force element on the basis of electrorheological liquids includes a piston with a piston rod guided in a cylindrical housing, and a force introduction element connected with the piston rod. The piston forms, in the cylindrical housing, two variable-volume ... | 06/15/2004 |
| 6729446 | Solenoid-operated driving apparatus and damping force control type hydraulic shock absorber using the same A damping force control type hydraulic shock absorber includes a plunger having a small-diameter main body portion slidably guided by a first fixed core made of a magnetic material. The plunger has a large-diameter attracted portion at an end thereof closer to a sec... | 05/04/2004 |
| 6702075 | Controllable shock absorber Controllable shock absorber with a damping valve controllable within a passage or bypass located between the lower working space and the upper working space, such that in the push and pull stage control of the damping force is possible, in which the contr... | 03/09/2004 |
| 6668986 | Active hydraulic fluid vehicular suspension damper A vehicular damper includes a cylinder, a piston rod in the cylinder having a hollow end defining an axial rod passage and a cylindrical piston affixed to the end of the rod dividing the cylinder into a compression chamber and a rebound chamber. A valve p... | 12/30/2003 |
| 6491145 | Regulable dashpot for motor vehicles, and method of adjusting such a dashpot A regulable hydraulic dashpot for motor vehicles and including a cylinder (1) filled with hydraulic fluid and a piston (2) that is attached to the end of a piston rod (7), travels back and forth inside the cylinder, and divides it into two chambers (3 & 4... | 12/10/2002 |
| 6454060 | Vehicle suspension monotube strut base cup assembly A vehicle suspension damper assembly is provided which includes a cup member with a threaded opening formed therein. A piston rod includes a threaded portion, which is engaged in the threaded opening. An electrical connector including a terminal portion i... | 09/24/2002 |
| 6422360 | Dual mode suspension damper controlled by magnetostrictive element Parallel paths for damping fluid are provided through the piston of a suspension damper, each of which are provided with separate damping valving sets to control damping. Communication through one of the paths is controlled by a movable control valve memb... | 07/23/2002 |
| 6379162 | Electrical connector system A suspension damper system is provided. The damper system includes a damper with a damper rod, a portion of which extends from the proximal end of the damper. The damper rod includes a bore and an electrode disposed within the bore. A fastener for securin... | 04/30/2002 |
| 6374967 | Damping force control type hydraulic shock absorber A damping force control type hydraulic shock absorber capable of generating stable damping force even if the flow rate of hydraulic fluid changes sharply. Hydraulic fluid chambers at the respective ends of valve members are cut off from the downstream por... | 04/23/2002 |
| 6345706 | Electrical coupling assembly for a magnetorheological damper An electrical coupling assembly for a damper, the coupling assembly including a base and a rod received through the base. The rod has a threaded connector end and a conductor extending through the rod from the connector end. The coupling assembly further ... | 02/12/2002 |
| 6293377 | Variable-damping force shock absorber An actuator disposed within a piston rod of a variable-damping force shock absorber has coils mounted at an inner peripheral face of the piston rod, permanent magnets disposed facing a stator, and a cylindrical body supported rotatably about the piston ro... | 09/25/2001 |
| 6119831 | Controllable vibration damper for motor vehicles A controllable vibration damper for motor vehicles, having a cylinder containing damping fluid, a piston rod entering the cylinder in a sealed manner and arranged axially displaceably therein, and a damping piston which is fastened to the piston rod and d... | 09/19/2000 |
| 6007345 | Damper and electrical connection system A damper and electrical connector system wherein the damper includes a ring mounting element having a base portion attached to a housing of the damper and a hole extending through the base portion and communicating with an interior chamber of the housing.... | 12/28/1999 |
| 5996748 | Damping force adjusting type hydraulic shock absorber A piston is slidably fitted in a cylinder for dividing the interior of the cylinder into upper and lower cylinder chambers. A reservoir is connected to the piston. A primary passage communicates between the upper cylinder chamber and the reservoir. The pr... | 12/07/1999 |
| 5971116 | Electronic suspension system for a wheeled vehicle An active, hydraulic suspension system for a wheeled vehicle is disclosed. The system utilizes an on-board damper controller, a damper having a pair of telescoping tubes and a motor-adjusted hydraulic channel, a position and direction sensor to achieve co... | 10/26/1999 |
| 5950775 | In-tube shock absorber mounted electromagnetically operated damper valve and shock absorber including adapter A shock absorber for use upon each corner of an automotive vehicle which includes a piston mounted upon a piston rod and appropriately disposed within a cylinder such that the piston separates the cylinder into a pair of operating chambers containing flui... | 09/14/1999 |
| 5927449 | Proportional valve with a variable performance curve A proportional valve for a hydraulic dashpot, with a piston that slides back and forth on the end of a piston rod in a shock-absorbing cylinder. The piston is provided with pressure-sensitive valves for the exchange of fluid during suction and compression... | 07/27/1999 |
| 5873437 | Shock absorber A shock absorbing system wherein arrangements are provided for altering the hysteresis effects of the fluid utilized so as to obtain desired damping curves. Particularly, by employing different hysteresis effects it is possible to obtain larger damping fo... | 02/23/1999 |
| 5810127 | Proportional valve A proportional valve for a hydraulic dashpot with a piston and cylinder. The piston travels back and forth in the cylinder on the end of a rod, accommodates pressure-dependent valves for hydraulic fluid to travel back and forth through during both the com... | 09/22/1998 |
| 5467852 | Twin-pipe shock absorber A twin-pipe shock absorber comprises a working cylinder (1), a piston (4) which is movable in the cylinder and has a passage and upstream valve (13, 14, 15), and external pipe (2) which is fitted around the working cylinder having an oil tank (3) formed t... | 11/21/1995 |
| 5303803 | Variable dashpot for motor vehicles A variable dashpot for motor vehicles A cylinder (2) full of vibration-suppressing fluid accommodates a piston (3). The piston is provided with vibration-suppressing valves, is fastened to a piston rod (8), and separates the cylinder into two compartments... | 04/19/1994 |
| 5285878 | Cylinder including a piston with a valve control In previously known shock absorbers, a throttle cross section can be controlled with the aid of a control slide. Because flow forces can never be avoided entirely, the magnetic force must be controlled as a function of the flowing pressure fluid flow. In ... | 02/15/1994 |
| 5277283 | Variable damping-characteristics shock absorber with adjustable orifice construction variable of fluid flow restriction depending upon fluid pressure difference A shock absorber is provided a piston stroke speed dependent linear variation characteristics of damping force. The shock absorber includes variable orifices in tandem fashion for achieving linear variation characteristics of damping force according to va... | 01/11/1994 |
| 5259487 | Adjustable dampers using electrorheological fluids Adjustable dampers using electrorheological (ER) fluids comprise one or more annular ER fluid transfer ducts in fluid communication with fluid chambers on opposite sides of the damper pistons. Each duct has one or more contoured surfaces or bands along a ... | 11/09/1993 |
| 5254009 | Controllable vibration damper for motor vehicles A variable dashpot for motor vehicles A hollow piston rod is secured to the vehicle's body by a fastener The piston rod accommodates electric connections that extend to one or more sensors and/or one or more valves The connections are also connected by wa... | 10/19/1993 |
| 5234085 | Pilot-controlled shock absorber The invention is directed to a shock absorber in which the structure of both the main valve and the pilot control valve is simplified, and makes their operation less vulnerable to malfunction because the number of parts moved relative to one another is re... | 08/10/1993 |
