Patent application number | Description | Published |
20110186393 | SHOCK ABSORBER - A piston connected to a piston rod is fitted in a cylinder having a hydraulic oil sealed therein. Flows of hydraulic oil induced in extension and compression passages by sliding movement of the piston are controlled by extension and compression damping force generating mechanisms, respectively, to generate damping force. In the extension and compression damping force generating mechanisms, the hydraulic oil is introduced into back pressure chambers through back pressure introducing orifices, respectively, and the opening of relief valves is controlled by the pressures in the back pressure chambers, respectively. In a low piston speed region, damping valves open, which are provided downstream of the back pressure chambers, respectively, and as the piston speed increases, the relief valves open to suppress an excessive increase of damping force. After the relief valves have opened as a result of an increase in the piston speed, the relief valves are kept open at piston speeds not lower than the piston speed at which the relief valves open, thereby obtaining stable damping force. | 08-04-2011 |
20110209956 | SHOCK ABSORBER - A piston connected to a piston rod is fitted in a cylinder having a hydraulic oil sealed therein. Flows of hydraulic oil induced in extension and compression passages and by sliding movement of the piston are controlled by extension and compression damping force generating mechanisms, respectively, to generate damping force. In the extension and compression damping force generating mechanisms, the hydraulic oil is introduced into back pressure chambers through back pressure introducing passages, respectively, and the opening of relief valves is controlled by the pressures in the back pressure chambers, respectively. The inner peripheral portions of the relief valves are supported from their rear sides by support members to provide gaps on the front sides of the relief valves, respectively. When the relief valves open, their inner peripheral edge portions move within the gaps pivotally about the support members as fulcrums, respectively. Therefore, the relief valves have substantially no change in their cross-sectional configurations, and the flexural rigidities of the relief valves have only a small influence on the valve opening characteristics. As a result, it is possible to increase the degree of freedom for setting damping force characteristics. | 09-01-2011 |
20110214953 | SHOCK ABSORBER - A shock absorber has an inclined surface that is inclined to a moving direction of the free piston in at least one of a free piston contact surface of a free piston with which an elastic body is in contact and a housing contact surface of a housing with which the elastic body is in contact. A shortest distance between the free piston contact surface and the housing contact surface is changed by movement of the free piston. | 09-08-2011 |
20110214955 | SHOCK ABSORBER - A shock absorber includes a first passage and a second passage to which a working fluid flows out from one chamber in a cylinder by movement of a piston, a damping valve installed on the first passage and configured to regulate a flow of the working fluid caused by sliding of the piston to generate a damping force, a back pressure chamber applying an internal pressure to the damping valve in a closing direction of the damping valve, a back pressure chamber inflow oil passage introducing the working fluid from one chamber into the back pressure chamber, a pressure chamber provided in-between on the second passage, and a free piston installed in the pressure chamber so as to freely slide in the pressure chamber. | 09-08-2011 |
20120248670 | SHOCK ABSORBER - A shock absorber includes first passages configured to communicate two chambers to flow a working fluid therebetween by movement of a piston, and a second passage configured to communicate with one chamber of the two chambers. The first passages have damping valves configured to suppress a flow of the working fluid generated by movement of the piston to generate a damping force. The second passage has a variable orifice having an area adjusted by an elastic member when a piston rod moves in an extension direction, a pressure chamber installed in series with the variable orifice, and a free piston configured to vary a volume of the pressure chamber by movement of the piston. | 10-04-2012 |
20140231201 | SHOCK ABSORBER - A shock absorber has an inclined surface that is inclined to a moving direction of the free piston in at least one of a free piston contact surface of a free piston with which an elastic body is in contact and a housing contact surface of a housing with which the elastic body is in contact. A shortest distance between the free piston contact surface and the housing contact surface is changed by movement of the free piston. | 08-21-2014 |
20140238796 | SHOCK ABSORBER AND VEHICLE USING THE SAME - A shock absorber includes a first and a second passage configured to flow a working fluid out of one chamber by movement of a piston, a first damping force generation mechanism installed at the first passage and configured to generate a damping force, a housing having at least a partial passage of the second passage formed therein, a free piston movably installed in the housing and configured to partition the second passage into an upstream side and a downstream side, and a spring member disposed in the housing and configured to hole the free piston at a neutral position, wherein a second damping force generation mechanism including a friction member installed at an inner side of the cylinder with respect to the sealing member and constituted by an annular elastic rubber section in sliding contact with the piston rod and an annular base section to which the elastic rubber section is fixed and a communication passage configured to reduce a pressure difference between both sides in an axial direction of the friction member is provided. | 08-28-2014 |
Patent application number | Description | Published |
20130250099 | MEASURING APPARATUS, MEASURING METHOD, AND METHOD OF MANUFACTURING AN OPTICAL COMPONENT - To eliminate influence of undesirable light component from an object when measuring optical characteristics such as shape and wavefront aberration of the object, light from light source ( | 09-26-2013 |
20140233038 | SHAPE MEASUREMENT METHOD, SHAPE MEASUREMENT APPARATUS, PROGRAM, AND RECORDING MEDIUM - The present invention is directed to more accurately acquiring shape data than conventional techniques. After an imaging unit images an interference fringe, a calculation unit acquires the captured image from the imaging unit. The calculation unit extracts a ring zone region where the interference fringe is sparse in the captured image from each captured image, and calculates a phase distribution of the interference fringe in each ring zone region. The calculation unit acquires a deviation component having an orientation and an amount both unchangeable along a circumferential direction of a circle centered at the optical axis of the subject light by analyzing the interference fringe contained in each acquired captured image. Further, the calculation unit calculates positions of characteristic points of a calibrator, and calculates a distortion component. Then, the calculation unit calculates the shape data corrected based on the deviation component and the distortion component. | 08-21-2014 |
20150036148 | WAVEFRONT MEASUREMENT METHOD, SHAPE MEASUREMENT METHOD, OPTICAL ELEMENT MANUFACTURING METHOD, OPTICAL APPARATUS MANUFACTURING METHOD, PROGRAM, AND WAVEFRONT MEASUREMENT APPARATUS - A wavefront measurement method includes the steps of causing object light to be incident on a Shack-Hartmann sensor, capturing a first spot image under an image pickup condition, calculating data of first spot positions that correspond to the first spot image, calculating second spot positions by simulating a second spot image on the basis of the image pickup condition and information of a travelling direction of diffracted light generated when the object light passes through the microlenses, and reducing detection errors of the spot positions by correcting the data of the first spot positions on the basis of data of the second spot positions including data of a detection error due to the diffracted light. | 02-05-2015 |