| Patent application number | Description | Published |
|---|
| 20080296818 | FLUID-FILLED TYPE VIBRATION DAMPING DEVICE - A fluid filled type vibration damping device includes a first mounting member, a second mounting member, a main rubber elastic body, a flexible film, a partition member, a valve, a coil, a control-signals-generating circuit and a power amplifier circuit. The valve enables to switch the second orifice passage between an open state and a closed state. The second orifice passage communicates the pressure-receiving chamber and the equilibrium chamber with each other. The switch of the valve is performed by an electromagnetic force occurring by an electrical connection of the coil. Furthermore the control-signals-generating circuit is formed and disposed separately from the coil. The control-signals-generating circuit produces state switching control signals of the valve. Moreover the power amplifier circuit which supplies an electric-current to the coil by amplifying the state switching control signals, constitutes an actuator unit attached integrally to the coil, and is disposed separately from the control-signals-generating circuit. | 12-04-2008 |
| 20090079118 | Fluid filled type vibration damping device - A vibration damping device including: a pressure-receiving chamber and an equilibrium chamber connected by a first orifice passage; a movable member disposed within the pressure-receiving chamber, to form a primary fluid chamber partly defined by a rubber elastic body, and an auxiliary fluid chamber partly defined by an oscillating plate; and a second orifice passage connecting the auxiliary fluid chamber to the equilibrium chamber. A through-hole is formed in a partition member that partitions the primary fluid chamber and the auxiliary fluid chamber, the oscillating plate is housed within the through-hole with a gap provided therebetween whereby the oscillating plate is displaceable in an axial direction within the through-hole. A stopper abutted by the oscillating plate during displacement to one axial side is provided, with the gap becoming closed off when the oscillating plate is in a state of abutment against the stopper. | 03-26-2009 |
| 20090102105 | Fluid filled vibration damping device and electric actuator for use in the same - A fluid filled vibration damping device including: a fluid passage interconnecting a pressure receiving chamber partially defined by a rubber elastic body connecting a first and second mounting members, and an equilibrium chamber partially defined by a flexible film; a movable valve body provided for switching the fluid passage between a communicating state and a blocked state through reciprocating operation; an electric motor employed for actuating the movable valve body; an actuating force converter mechanism provided on an actuating force transmission path from the electric motor to the movable valve body. A rotational actuating force of the electric motor is transmitted as reciprocating actuating force to the movable valve body by the actuating force converter mechanism. | 04-23-2009 |
| 20090184447 | FLUID-FILLED TYPE VIBRATION DAMPING DEVICE - A Fluid-filled type vibration damping device, which is configured to be free from the necessity of supplying a continuous application of electricity to a coil so as to maintain a movable valve body in either an opened state or a closed state, is provided. The device includes a cam mechanism, which transmits a rotational drive force of a motor to the movable valve body in the form of a reciprocating drive force. In the device, a first rotation angle switch is connected to a first control switch in series relative to a motor coil, and a second rotation angle switch is connected to a second control switch in parallel relative to the first switch. The first rotation angle switch is turned on in a state of a first angular range θ | 07-23-2009 |
| 20100301530 | Fluid-filled type active vibration damping device and manufacturing method thereof - A fluid-filled type active vibration damping device including a vibration damping device main unit, an oscillation member, and an actuator. The actuator is constituted by an electromagnetic actuator having a stator that includes a coil fixed to a second mounting member while having a movable member linearly displaceable relative to the stator when the coil is energized. A shaft member is provided for connecting the movable member and the oscillation member with each other. A connecting portion is provided for attaching the shaft member to the movable member while permitting the shaft member to tilt as well as to undergo displacement in an axis-perpendicular direction with respect to the movable member. A displacement preventing portion is provided for fastening the movable member and the shaft member to each other by preventing tilt as well as displacement in the axis-perpendicular direction due to the connecting portion. | 12-02-2010 |
| 20110057367 | ACTIVE VIBRATION DAMPER AND METHOD OF MANUFACTURING ACTIVE VIBRATION DAMPER - An active vibration damper including: an inner shaft member provided to a movable member; an outer tube member provided to a stator; a pair of leaf springs elastically connecting axially both sides of the inner shaft member and the outer tube member so as to make a linear actuator operatable by itself; an elastic connecting rubber connecting the inner shaft member and the outer tube member; a mass body holding portion provided to the inner shaft member for holding an additional mass body that is disposed further outwardly than the elastic connecting rubber; and a housing having a structure dividable in an axial direction in which respective openings are secured to each other with an annular seal being interposed therebetween at an outer peripheral side of the elastic connecting rubber. | 03-10-2011 |
| 20110180980 | ACTIVE ANTIVIBRATION DEVICE AND MANUFACTURING METHOD FOR THE SAME - An active antivibration device which includes a main body, a mobile element which is elastically supported inside the main body and movable in an axial direction of the main body, and a coil which is disposed inside the main body and fixed to the main body. The mobile element includes a mobile axis body supported in the axial direction of the main body, and a first yoke, a permanent magnet and a second yoke which are held by the mobile axis body and disposed successively along an axial direction of the mobile axis body. The permanent magnet is magnetized in the axial direction of the mobile axis body and disposed between the first yoke and the second yoke. | 07-28-2011 |
| 20120242019 | FLUID-FILLED TYPE ACTIVE VIBRATION DAMPING DEVICE - A fluid-filled type active vibration damping device including: a pressure-receiving chamber; an equilibrium chamber; an orifice passage permitting fluid flow between the two chambers; an oscillation member oscillated by an electromagnetic actuator; an intermediate chamber; and a pressure transmission passage through which pressure fluctuations produced in the intermediate chamber is applied to the pressure-receiving chamber. The intermediate chamber is provided independently of the equilibrium chamber. The pressure transmission passage comprises a filter orifice tuned to higher frequency than the orifice passage. A movable plate is provided for limiting an amount of fluid flow through the filter orifice. A leak hole is formed for continuously interconnecting the intermediate chamber and the pressure-receiving chamber, and a liquid column resonance frequency of the leak hole is set to not more than half of that of the filter orifice. | 09-27-2012 |
| 20120242020 | FLUID-FILLED TYPE ACTIVE VIBRATION DAMPING DEVICE - A fluid-filled type active vibration damping device including: a first mounting member; a second mounting member; a main rubber elastic body connecting the first and second mounting members; a fluid chamber; an oscillation member that partially defines a wall of the fluid chamber; an actuator having an output shaft, the output shaft being connected to the oscillation member; a connecting member that interconnects the oscillation member and the output shaft at one point with the oscillation member superposed against a projecting distal end of the output shaft; and an abutting portion provided by superposed faces of the oscillation member and the output shaft being positioned in abutment with each other at an outer peripheral side of a connected section where the oscillation member and the output shaft are interconnected by the connecting member. | 09-27-2012 |
| 20120242021 | FLUID-FILLED TYPE VIBRATION DAMPING DEVICE AND MANUFACTURING METHOD THEREOF - A fluid-filled type vibration damping device including a base component and a tubular mating component. The tubular mating component is externally fitted onto the base component by means of a diameter-constricting caulking with a sealing rubber clasped therebetween so as to constitute a mate-fastened portion. The tubular mating component extends axially outward beyond a sealed section of the mate-fastened portion so as to provide a caulking tube portion. A diametrical position of the tubular mating component at the sealed section is determined by contact of the caulking tube portion against an outside peripheral face of a positioning projection provided on the base component so as to define a diametrical positioning portion. The caulking tube portion is constricted in diameter and held in engagement with an axial edge portion of the positioning projection so as to form an axial positioning portion. | 09-27-2012 |
