Patent application number | Description | Published |
20100231068 | DISK DRIVE DEVICE FOR ROTATING A DISK - In the brushless motor, a magnetic recording disk is to be mounted on a hub. A base plate rotatably supports the hub on the upper surface. A laminated core is fixed on the upper surface of the base plate and has a ring portion and a plurality of teeth that extend radially from the ring portion. Coils are wound around the plurality of teeth. A cylindrical magnet is fixed to the hub and is magnetized for driving with a plurality of poles along the circumferential direction and is arranged to radially face the plurality of teeth of the laminated core. A wire of one end of one of the coils is drawn out to the bottom surface of the base plate through a hole arranged on the base plate. The wire is connected to a driving line for supplying a current to the coils at a position other than the position of the hole on the base plate. The hole of the base plate is plugged with a resin. | 09-16-2010 |
20100254639 | FLUID DYNAMIC BEARING FILLED WITH LUBRICANT IN WORK AREA HAVING REDUCED PRESSURE, METHOD OF MANUFACTURING THE FLUID DYNAMIC BEARING, APPARATUS FOR MANUFACTURING THE FLUID DYNAMIC BEARING, AND ROTATING DEVICE - In an apparatus for manufacturing a fluid dynamic bearing, a housing portion defines a first work area. A vacuum pump discharges air in the first work area. A lubricant discharge device is arranged in the first work area, and discharges a lubricant into an inlet of a reservoir for storing the lubricant of the fluid dynamic bearing. At least one aperture is provided in the housing portion. A first door closes the aperture and a second door closes the aperture. Between the first door and the second door, when both have closed the aperture, a second work area is formed where the fluid dynamic bearing is placed. | 10-07-2010 |
20130069460 | DISK DRIVE DEVICE FOR ROTATING A DISK - In the brushless motor, a magnetic recording disk is to be mounted on a hub. A base plate rotatably supports the hub on the upper surface. A laminated core is fixed on the upper surface of the base plate and has a ring portion and a plurality of teeth that extend radially from the ring portion. Coils are wound around the plurality of teeth. A cylindrical magnet is fixed to the hub and is magnetized for driving with a plurality of poles along the circumferential direction and is arranged to radially face the plurality of teeth of the laminated core. A wire of one end of one of the coils is drawn out to the bottom surface of the base plate through a hole arranged on the base plate. The wire is connected to a driving line for supplying a current to the coils at a position other than the position of the hole on the base plate. The hole of the base plate is plugged with a resin. | 03-21-2013 |
20130234550 | DISK DRIVE DEVICE FOR ROTATING A DISK - In the brushless motor, a magnetic recording disk is to be mounted on a hub. A base plate rotatably supports the hub on the upper surface. A laminated core is fixed on the upper surface of the base plate and has a ring portion and a plurality of teeth that extend radially from the ring portion. Coils are wound around the plurality of teeth. A cylindrical magnet is fixed to the hub and is magnetized for driving with a plurality of poles along the circumferential direction and is arranged to radially face the plurality of teeth of the laminated core. A wire of one end of one of the coils is drawn out to the bottom surface of the base plate through a hole arranged on the base plate. The wire is connected to a driving line for supplying a current to the coils at a position other than the position of the hole on the base plate. The hole of the base plate is plugged with a resin. | 09-12-2013 |
Patent application number | Description | Published |
20090131180 | Boot for Universal Joint - To make a bellows section ( | 05-21-2009 |
20090253522 | Boot for Universal Joint - To prevent inverting of a mountain portion ( | 10-08-2009 |
20090291866 | GREASE COMPOSITIONS FOR CONSTANT VELOCITY JOINTS AND CONSTANT VELOCITY JOINTS - The invention provides a grease composition for constant velocity joints and constant velocity joints in which the grease composition is packed. The composition comprises (a) a base oil comprising a synthetic oil; (b) a thickening agent; (c) a molybdenum sulfurized dialkyl dithiocarbamate; (d) a thiophosphate; and (e) a zinc sulfurized dialkyl dithiocarbamate. The composition can reduce low temperature rotational torque and folding torque in constant velocity joints while inhibiting deterioration of a boot material comprising a silicone rubber. | 11-26-2009 |
20100167827 | STEERING JOINT - An outer joint member ( | 07-01-2010 |
20110034255 | FIXED-TYPE, CONSTANT-VELOCITY UNIVERSAL JOINT - Provided is a fixed type constant velocity universal joint capable of securing a ball groove depth larger in comparison with that of conventional products and enhancing performance without an increase in a “force of pushing out balls in an axial direction”, the force having an influence on joint efficiency. A ratio (F/PCR) of an offset amount F to a length (PCR) of a segment connecting the center of each of the guide grooves ( | 02-10-2011 |
20140243104 | FIXED TYPE CONSTANT-VELOCITY UNIVERSAL JOINT - Track grooves of an outer joint member include first and second track groove portions positioned on interior and opening sides, respectively. Each first track groove portion has an arc shape with a curvature center at a position offset to the opening side with respect to a joint center. The first track groove portions are inclined in a peripheral direction of the outer joint member with respect to a joint axial line and adjacent to each other in the peripheral direction with their inclination directions opposite to each other. Each second track groove portion has a shape that is different than each of the first track groove portions so as to increase an effective track length at a maximum operating angle. The second track groove portions are connected to the first track groove portions at a position on the opening side with respect to the joint center. | 08-28-2014 |
20140309045 | FIXED TYPE CONSTANT VELOCITY UNIVERSAL JOINT - In a fixed type constant velocity universal joint, track grooves of an outer joint member include first and second track groove portions positioned on interior and open sides, respectively. Each of the first track groove portions includes an arc-shaped ball raceway center line having a curvature center prevented from being offset in an axial direction of the outer joint member with respect to a joint center. Planes each including at least the ball raceway center line and the joint center are inclined with respect to a joint axial line with their inclination directions opposite to each other in the first track groove portions, which are adjacent to each other in a peripheral direction of the outer joint member. Each of the second track groove portions includes a ball raceway center line having a straight part when being projected onto corresponding one of the planes. | 10-16-2014 |
20140329608 | FIXED TYPE CONSTANT VELOCITY UNIVERSAL JOINT - In a fixed type constant velocity universal joint, track grooves of an outer joint member include first track groove portions positioned on an interior side and second track groove portions positioned on an opening side. The first track groove portions each have an arc-shaped ball raceway center line having a curvature center that is prevented from being offset in an axial direction of the outer joint member with respect to a joint center. Planes each including at least the ball raceway center line and the joint center are inclined with respect to a joint axial line with their inclination directions alternately opposite to each other in the first track groove portions that are adjacent to each other in a peripheral direction of the outer joint member. | 11-06-2014 |
Patent application number | Description | Published |
20090136287 | Slide-Type Constant Velocity Universal Joint - The present invention provides a light and compact slide-type constant velocity universal joint that can have a maximum operating angle of 30° or more through optimization of a ball contact angle relative to ball grooves, a ball contact ratio, and a cage offset amount. The present invention is the slide-type constant velocity universal joint including an outer ring | 05-28-2009 |
20090317177 | CONSTANT VELOCITY UNIVERSAL JOINT - The present invention provides a constant velocity universal joint having a recess-projection engagement configuration in which backlash at a shaft connecting region does not easily occur, and an inner joint component and a shaft can be firmly connected. In the constant velocity universal joint of the present invention, the inner joint component and the shaft | 12-24-2009 |
20100069164 | FIXED TYPE CONSTANT VELOCITY UNIVERSAL JOINT - Provided is a fixed type constant velocity universal joint capable of securing smooth rotation and reducing a load on a cage even at a large operating angle and at a time of bearing large torque. The fixed type constant velocity universal joint includes an outer joint member having opened one end and an inner spherical surface in which multiple track grooves are circumferentially formed in an axial direction; an inner joint member ( | 03-18-2010 |
20110059804 | FIXED-TYPE, CONSTANT-VELOCITY UNIVERSAL JOINT - Provided is a fixed type constant velocity universal joint which is capable of achieving the following even at the time of an unexpected high-angle operation, in particular, even when an angle expected during use of a constant velocity universal joint is exceeded: reduction of stress generated when balls and edge portions interfere with each other, suppression of chipping of the edge portions, and prolongation of a service life of the joint as a whole. The fixed type constant velocity universal joint includes: an outer joint member having an inner surface ( | 03-10-2011 |
20110212788 | FIXED CONSTANT VELOCITY UNIVERSAL JOINT, METHOD OF MANUFACTURING FIXED CONSTANT VELOCITY UNIVERSAL JOINT, AND BEARING DEVICE ADAPTED FOR USE IN DRIVING WHEEL AND USING FIXED CONSTANT VELOCITY UNIVERSAL JOINT - Provided is a fixed type constant velocity universal joint, including: an outer joint member having an inner spherical surface provided with a plurality of track grooves extending in an axial direction; an inner joint member having an outer spherical surface provided with a plurality of track grooves extending in the axial direction in pairs with the plurality of track grooves of the outer joint member; a plurality of balls interposed between the plurality of track grooves of the outer joint member and the plurality of track grooves of the inner joint member so as to transmit torque; and a cage interposed between the inner spherical surface of the outer joint member and the outer spherical surface of the inner joint member so as to hold the plurality of balls, at least one of the plurality of track grooves of the outer joint member and the plurality of track grooves of the inner joint member being formed by cold-forging finishing, in which components including the outer joint member, the inner joint member, the plurality of balls, and the cage are assembled to each other based on matching in which the plurality of balls and the cage each having a rank corresponding to a measured value of a PCD of the outer joint member, which has been arbitrarily selected, and to a measured value of a PCD of the inner joint member, which has been arbitrarily selected, are selected with respect to the arbitrarily selected outer joint member and the arbitrarily selected inner joint member. | 09-01-2011 |
20110269556 | OUTER JOINT MEMBER FOR FIXED CONSTANT VELOCITY UNIVERSAL JOINT - Provided is an outer joint member for a fixed type constant velocity universal joint, the outer joint member contributing to reduction of the number of man-hours through reduction of the number of post processes after a forging process, and to an increase in yield, and reduction of manufacturing cost. The outer joint member for a fixed type constant velocity universal joint includes a cup section ( | 11-03-2011 |
20140309045 | FIXED TYPE CONSTANT VELOCITY UNIVERSAL JOINT - In a fixed type constant velocity universal joint, track grooves of an outer joint member include first and second track groove portions positioned on interior and open sides, respectively. Each of the first track groove portions includes an arc-shaped ball raceway center line having a curvature center prevented from being offset in an axial direction of the outer joint member with respect to a joint center. Planes each including at least the ball raceway center line and the joint center are inclined with respect to a joint axial line with their inclination directions opposite to each other in the first track groove portions, which are adjacent to each other in a peripheral direction of the outer joint member. Each of the second track groove portions includes a ball raceway center line having a straight part when being projected onto corresponding one of the planes. | 10-16-2014 |
20140329608 | FIXED TYPE CONSTANT VELOCITY UNIVERSAL JOINT - In a fixed type constant velocity universal joint, track grooves of an outer joint member include first track groove portions positioned on an interior side and second track groove portions positioned on an opening side. The first track groove portions each have an arc-shaped ball raceway center line having a curvature center that is prevented from being offset in an axial direction of the outer joint member with respect to a joint center. Planes each including at least the ball raceway center line and the joint center are inclined with respect to a joint axial line with their inclination directions alternately opposite to each other in the first track groove portions that are adjacent to each other in a peripheral direction of the outer joint member. | 11-06-2014 |
Patent application number | Description | Published |
20090076688 | LAMP SYSTEM AND LAMP DEFLECTION CONTROL METHOD - A processing section determines whether a steering angle of a steering wheel of a vehicle is within or outside a range-to-be-ignored and sets an output steering angle depending on whether the steering angle is within or outside the range-to-be-ignored. A deflection angle calculating section calculates a deflection angle based on the output steering angle, and a swivel control section controls an irradiating direction of a lamp of the vehicle in accordance with the deflection angle. If the steering angle is determined to be outside the range-to-be-ignored, the processing section changes the range-to-be-ignored such that the steering angle is included within the range-to-be-ignored. | 03-19-2009 |
20090200947 | VEHICLE LAMP CONTROL SYSTEM AND CONTROL METHOD - A vehicle lamp control system includes a target irradiating direction setting unit which sets, in accordance with a running condition of a vehicle, a target irradiating direction of the lamp. An actuator controls an irradiating direction of the lamp to be directed in the target irradiating direction based on a reference direction. The actuator includes a reference setting section which executes a reference setting operation to set the irradiating direction of the lamp to be directed in the reference direction. The target irradiating direction setting unit includes a condition determining section which determines whether the reference setting section has executed the reference setting operation, and a reference setting command section which, when the condition determining section determines that the reference setting section has not yet executed the reference setting operation, instructs the reference setting section to execute the reference setting operation. | 08-13-2009 |
20090204298 | IRRADIATING DIRECTION CONTROL SYSTEM FOR A VEHICLE LAMP - A system for controlling an irradiating direction of a vehicle lamp includes a target swivel angle calculating section to calculate a target swivel angle based on a vehicle steering angle, a swivel driver to execute, based on the target swivel angle, a swivel control to swivel the irradiating direction, and a fail-safe controller to execute, upon detection of a failure in the system, a fail-safe operation to stop the swivel control. When the system is restored after the failure, the fail-safe controller determines whether the target swivel angle is within a straight-ahead range that includes an angle corresponding to a straight-ahead direction of a vehicle. If the fail-safe controller determines that the target swivel angle is within the straight-ahead range, the fail-safe controller deactivates the fail-safe operation to restart the swivel control. | 08-13-2009 |
20100080009 | DEVICE AND METHOD FOR CONTROLLING DEFLECTION OF LAMP - Controlling a deflection of an irradiation direction of a vehicle lamp based on a detected steering angle includes calculating a target angle of the irradiation direction of the vehicle lamp based on the steering angle and calculating a difference angle between the target angle and a current deflection angle of the irradiation direction of the vehicle lamp. A new deflection angle is calculated and includes setting the new deflection angle to the target angle if the difference angle is equal to or smaller than a given limit angle, and setting the new deflection angle to an angle obtained by adding or subtracting the limit angle to or from the current deflection angle if the difference angle is larger than the given limit angle. Deflection of the irradiation direction of the lamp is controlled based on the deflection angle. | 04-01-2010 |
20110317439 | CONTROL APPARATUS FOR VEHICLE LAMP, VEHICLE LIGHTING SYSTEM, AND VEHICLE LAMP - A control apparatus of a vehicle lamp is provided with a reception section ( | 12-29-2011 |
20120002430 | CONTROL DEVICE FOR VEHICLE LAMP, VEHICLE LAMP, AND METHOD OF CONTROLLING VEHICLE LAMP - There is provided a control device for controlling a vehicle lamp provided in a vehicle. The device includes: a receiver configured to receive an inclination angle of the vehicle with respect to a horizontal plane from an inclination detector; a controller configured to: i) generate a first control signal instructing the vehicle lamp to adjust an optical axis of the vehicle lamp in response to a change of the inclination angle, when the vehicle has already stopped; and ii) generate a second control signal instructing the vehicle lamp to maintain the optical axis of the vehicle lamp, when the vehicle is traveling on a road surface; and a transmitter configured to transmit the first control signal or the second control signal to an optical axis adjuster provided in the vehicle lamp. | 01-05-2012 |
20120101692 | VEHICLE LAMP CONTROLLER, VEHICLE LAMP SYSTEM, AND VEHICLE LAMP CONTROL METHOD - A vehicle lamp controller, a vehicle lamp system, and a vehicle lamp control method are provided. The vehicle lamp system includes an acceleration sensor, a vehicle lamp, and the vehicle controller. The controller includes a receiver configured to receive an acceleration information detected by the acceleration sensor, a control unit configured to derive a vehicle longitudinal direction acceleration and a vehicle vertical direction acceleration from the acceleration information, and to generate a control signal for instructing an adjustment of an optical axis of the vehicle lamp, based on a variation in a ratio between a temporal change amount of the vehicle longitudinal direction acceleration and a temporal change amount of the vehicle vertical direction acceleration during at least one of an acceleration and a deceleration of a vehicle, and a transmitter configured to transmit the control signal to an optical axis adjusting portion of the vehicle lamp. | 04-26-2012 |
20120155098 | VEHICLE LAMP CONTROL APPARATUS - A vehicle lamp control apparatus is provided with: a receiving portion for receiving output values of an acceleration sensor; a control portion for deriving a variation in an inclination angle of a vehicle based on the output values of the acceleration sensor and generating a control signal for instructing an optical axis adjustment of a vehicle lamp; and a transmitting portion for transmitting the control signal to an optical axis adjusting portion of the vehicle lamp. The control portion is configured to detect an error factor of the output values occurring in the acceleration sensor based on the output values of the acceleration sensor and to correct an optical axis position of the vehicle lamp. | 06-21-2012 |
20120206043 | VEHICLE HEAD LAMP LIGHT DISTRIBUTION CONTROLLER - A vehicle head lamp light distribution controller includes an ADB controller configured to: detect a position of a vehicle present ahead of a subject vehicle; determine whether the vehicle ahead of the subject vehicle is a preceding vehicle or an oncoming vehicle; set a threshold vehicle position based on whether the vehicle ahead of the subject vehicle is a preceding vehicle or an oncoming vehicle; compare the threshold vehicle position and the detected vehicle position; and switch light distribution of head lamps of the subject vehicle based on the comparison between the threshold vehicle position and the detected vehicle position. | 08-16-2012 |
20120268958 | CONTROL DEVICE FOR VEHICLE LAMP AND VEHICLE LAMP SYSTEM - A control device ( | 10-25-2012 |
20120294020 | CONTROL APPARATUS FOR VEHICLE LAMP AND VEHICLE LAMP SYSTEM - A control apparatus for a vehicle lamp includes a receiver to receive an acceleration signal indicative of an acceleration detected by an acceleration sensor, and a controller to derive an inclination angle of a vehicle relative to a horizontal plane from the acceleration signal. While the vehicle is stopped and if a change in the acceleration exceeds a threshold, the controller outputs an adjustment signal indicative of an instruction to adjust an optical axis of the vehicle lamp in accordance with a difference in the inclination angle before and after the change in the acceleration. | 11-22-2012 |
20120303223 | VEHICLE LAMP CONTROL APPARATUS AND VEHICLE LAMP SYSTEM - Techniques are disclosed for enhancing the accuracy of auto-leveling control to adjust the optical axis of a vehicle lamp using an acceleration sensor. A controller stores reference values of first and second angles, updates the reference value of the second angle by treating a change of a sum angle during a vehicle stop as a change of the second angle, and updates the reference value of the first angle by treating a change of the sum angle during vehicle traveling as a change of the first angle. The controller derives a difference between a value of the sum angle and a sum of the reference values of the first and second angles, and corrects at least one of the reference values so as to reduce the difference. | 11-29-2012 |
20120310486 | VEHICLE LAMP CONTROL DEVICE AND VEHICLE LAMP SYSTEM - A control device of a vehicle lamp includes: a receiving section which receives an acceleration value usable to derive a tilt angle of a vehicle to a horizontal plane, wherein the tilt angle of the vehicle to the horizontal plane is represented as a total angle; and a control section which controls an optical axis adjustment of the vehicle lamp. The control section derives from the total angle a first and a second provisional vehicle posture angles based on a first and a second calculation method, respectively, corrects the first or second provisional vehicle posture angle so that a difference between the first and the second provisional vehicle posture angles becomes small, sets the corrected provisional vehicle posture angle to the vehicle posture angle, and outputs a control signal for instructing the optical axis adjustment of the vehicle lamp according to the vehicle posture angle. | 12-06-2012 |
20130039080 | AUTOMOTIVE HEADLAMP APPARATUS AND LIGHT DISTRIBUTION CONTROL METHOD - A automotive headlamp apparatus is configured such that, when there is a forward vehicle positioned in a predetermined first area, a control unit controls a shading unit so as to generate a single additional light distribution pattern selected from multiple additional light distribution patterns such that exposure of the forward vehicle to illumination is shielded, and when there is a forward vehicle positioned in a predetermined second area, the control unit controls the shading unit so as to generate a single additional light distribution pattern selected from multiple additional light distribution patterns, and controls a driving unit so as to swivel the optical axis of a lamp unit, such that the forward vehicle is not exposed to illumination. | 02-14-2013 |
20140056012 | LAMP CONTROL SYSTEM AND CONTROL DEVICE - A lamp control system includes: a lamp configured to form a light distribution pattern ahead of a vehicle using a non-illumination region forming unit, wherein the light distribution pattern includes a non-illumination region, and the illumination region includes at least one longitudinal cutoff line; a detector configured to detect a front vehicle in front of the vehicle; an information acquiring unit configured to acquire a displacement direction and a displacement speed of the front vehicle; and a light distribution controller configured to control the light distribution pattern using the non-illumination region forming unit such that the front vehicle is positioned in the non-illumination region. When the front vehicle is approaching the longitudinal cutoff line, the light distribution controller controls the light distribution pattern based on the displacement direction and the displacement speed to increase an interval between the longitudinal cutoff line and the front vehicle. | 02-27-2014 |
20150142275 | VEHICLE LAMP CONTROL DEVICE - In a vehicle lamp control device, a control unit is configured to: a) hold a road surface angle reference value and a vehicle posture angle reference value in a volatile manner; b) generate an optical axis adjusting signal using a vehicle posture angle in response to variation in a total angle during the stop of the vehicle; c) avoid generating or outputting the optical axis adjusting signal or output an optical axis holding signal, and hold a road surface angle as a new reference value, in response to variation in the total angle during travelling of the vehicle; and d) in response to receiving the turn-off signal of the switch, d-1) write at least the road surface angle reference value in the storage unit or continue to execute the step (c) while delaying the step (d-1). | 05-21-2015 |
20150146441 | VEHICLE LAMP CONTROL APPARATUS - A vehicle lamp control apparatus includes a receiver, a storage, a correction section, and an adjustment instruction section. The receiver receives output values of an acceleration sensor. The storage stores information indicating an ideal positional relationship between sensor-side axes and vehicle-side axes. The correction section plots the output values, obtained during running of a vehicle, on coordinates in which acceleration in a vehicle longitudinal direction is set to a first axis and acceleration in a vehicle lateral/vertical direction is set to a second axis, derives a straight line from plotted points, calculates displacements of the sensor-side and vehicle-side axes from the ideal positional relationship, using an inclination of the straight line, and corrects the information. The adjustment instruction section derives a tilt angle of the vehicle from current acceleration using the corrected information, and generates a control signal to instruct adjustment of an optical axis of a vehicle lamp. | 05-28-2015 |
Patent application number | Description | Published |
20080223673 | HYDRAULIC SHOCK ABSORBER - A shock absorber includes a cylinder tube connected to one portion of a shock absorbing body, a main piston rod extending from a piston with its extension end being connected to another portion of the shock absorbing body, a sub piston rod extending from the piston, an oil chamber pressurizing device arranged to pressurize a hydraulic oil, and damping force generators arranged to generate a damping force by allowing the hydraulic oil to flow between first and second oil chambers. A sealed space for containing an extension end of the sub piston rod is provided. Gas having a pressure larger than atmospheric pressure and smaller than a pressure applied on the hydraulic oil by the oil chamber pressurizing device is filled in the sealed space. | 09-18-2008 |
20090283373 | DAMPER - A damper includes a cylinder tube having a first end connected to one portion of a member of an object for damping, and a fixing rod guide arranged to close a second end of the cylinder tube; a movable rod guide fitted on the first end of the cylinder tube; a main piston rod extending from the piston side, the piston fitted in the cylinder tube and passing through the fixing rod guide; a sub-piston rod extending on the piston side and passing through the movable rod guide; and a spring normally biasing the movable rod guide toward the piston. A damping force generation oil passage is arranged to connect first and second oil chambers in a cylinder tube defined by the piston. The number of parts of a through-rod type damper is reduced to simplify a construction thereof and to make the damper compact. | 11-19-2009 |
20100072009 | HYDRAULIC DAMPER - A hydraulic damper includes a cylindrical tube, a first rod guide fitted close to one end of the cylindrical tube, a second rod guide fitted closer to the other end of the cylindrical tube, and a piston arranged to be axially slidable between the two rod guides. The piston partitions a space between the two rod guides into a first oil chamber and a second oil chamber. A main piston rod extends from the piston and penetrates the first rod guide. An auxiliary piston rod extends from the piston and penetrates the second rod guide. A pressurizer is arranged to pressurize hydraulic fluid filled in the first oil chamber and the second oil chamber. Damping force generators are arranged to generate a damping force by allowing the hydraulic fluid to flow between the two oil chambers. The main piston rod and the auxiliary piston rod have different diameters from each other. The hydraulic damper has a simple constitution and is capable of increased responsiveness. | 03-25-2010 |
20110120822 | AUTOMOBILE HYDRAULIC SHOCK ABSORBER - An automobile hydraulic shock absorber includes a cylinder body, a piston, an upper support, a piston rod, a volume adjustment mechanism, first and second communicating passages, and a pressure-applying mechanism. The piston rod is attached to the upper support via a rubber cushion. The volume adjustment mechanism includes a free piston. The first and second communicating passages communicate the first oil chamber and second oil chamber with each other in the cylinder body via a diaphragm. The pressure-applying mechanism is disposed outside the cylinder body, movement thereof is restricted by the upper support, and the pressure-applying mechanism pushes the piston rod downward. | 05-26-2011 |