Class / Patent application number | Description | Number of patent applications / Date published |
384012000 | Fluid bearing | 35 |
20080199111 | Hydrostatic Bearing - A hydrostatic bearing for supporting horizontal and vertical forces, with a guide rail ( | 08-21-2008 |
20080240630 | Gas Bearing System - A linear motor device with an improved gas bearing construction is described. The device comprises a linear motor includes a platen and a motor stack with a bottom face positionable above the platen. The motor stack has a bottom face with a recessed gas pocket. The linear motor further comprising a gas bearing comprising a gas introduced from the motor stack into the recess pocket and flowing between the platen and the bottom face of the stack. | 10-02-2008 |
20080304772 | Hydrostatic guide system - A hydrostatic guide system including a guide table, a transfer table, a floating amount sensor attached to the transfer table, and a control unit. The transfer table has an inner portion, in which a magnetic attraction unit including a yoke and an electromagnet is embedded, and an outer shell portion, which covers the side surface and the upper surface of the inner portion. After the inner portion houses the yoke and the electromagnet, a gap around the yoke and the electromagnet is filled with a material having appropriate strength, so that the inner portion is integrated with the outer shell portion, and the transfer surface is flattened as whole. A surrounding groove is provided around the transfer table, and pressurized fluid supplied into the groove is jetted out to the guide table. | 12-11-2008 |
20090016651 | HYDROSTATIC BEARING AND STAGE APPARATUS - A hydrostatic bearing configured to slide along a sliding surface of a structural body in a non-contact manner, the hydrostatic bearing includes a jetting part having a jetting surface configured to jet air onto the sliding surface; and a suction part having a suction surface configured to suction the air jetted from the jetting surface onto the sliding surface. The suction surface is situated at one of an internal circumferential side and an external circumferential side of the jetting part and is positioned higher than a lower end of the jetting part. | 01-15-2009 |
20090022436 | BEARING UNIT, MOTOR AND DISK DRIVE APPARATUS WITH THE BEARING UNIT - A bearing unit includes a shaft, a tubular bearing member, a planar plate fixed to a lower side of the bearing member and a lubricant filled between the shaft and an inner circumferential surface of the bearing member. In the bearing member, an inner circumferential wall portion is axially downwardly protruding from a lower surface of the bearing member and has a first surface contacting with and extending in a parallel with an upper surface of the plate and a second surface axially spaced apart from the upper surface of the plate. An outer circumferential wall portion is positioned radially outwardly of the second surface. The plate is fixed to the outer circumferential wall portion of the bearing member, and a radial inner side of the inner circumferential wall portion communicates with the outer circumferential wall portion through a gap formed between the second surface and the slate. | 01-22-2009 |
20090252441 | HYDROSTATIC PROFILE RAIL GUIDE - Hydrostatic profile rail guide with a guide carriage that is hydrostatically mountable on a guide rail, whereby the guide carriage features a back and two sides that are attached to the back, between which the guide rail is located, whereby the back features a mounting surface on the side facing away from the guide rail for the mounting of, for example, a machine part, with the mounting surface concave when seen in the longitudinal direction of the guide rail. | 10-08-2009 |
20090297075 | Hydrostatic Slider - A static pressure slider | 12-03-2009 |
20090324145 | AEROSTATIC DEVICE DAMPER - An aerostatic device for ultra precision machine tools, the aerostatic device having a damping device for use at any angle, including vertical, and comprising a male part ( | 12-31-2009 |
20100034489 | Gas Bearing - Prior art discloses gas bearings, which use a stream of gas to support a piston. This is achieved by micro-nozzles in the cylinder wall of a cylindrical element. Micro-nozzles of this type are susceptible to dirt retention. According to the invention, channels that run parallel with the cylinder axis are provided on the inner face of the base element, some of the channels supplying gas via the compression chamber and the other channels being connected to the gas reservoir. | 02-11-2010 |
20100046862 | LINEAR COMPRESSOR AND GAS THRUST BEARING THEREFOR - A gas thrust bearing includes a cavity, a body moveable in the cavity, and a bearing bush surrounding the cavity and the moveable body. The bearing bush includes a wall defining an inner chamber, and a plurality of supply holes in the wall and configured such that compressed gas applied on an outer side of the bearing bush forms a gas cushion in the inner chamber to support the movable body. The body includes a material having a coefficient of thermal expansion that is different than a coefficient of thermal expansion of a material of the bearing bush. | 02-25-2010 |
20100067834 | HYDROSTATIC PROFILE RAIL GUIDE - A hydrostatic profile rail guide, which has a guide carriage mounted hydrostatically on a guide rail designed with a U-shaped cross-section, pressure pockets for building up hydrostatic pressure between the guide carriage and rail, gaps connected to the pressure pockets for hydraulic fluid, a drainage for hydraulic fluid emerging from the gaps, and a seal surrounding the drainage and arranged between the guide carriage and rail which has side and head portions. At least one of the side portions of the seal is arranged between each leg of the guide carriage and rail, and at least one of the head portions of the seal is arranged transversely to the guide rail on both head sides of the guide carriage. The side portions of the seal are formed by side seals arranged on the guide rail and the head portions are formed by head seals arranged on the guide carriage. | 03-18-2010 |
20100067835 | HYDROSTATIC MOUNTING - A hydrostatic mounting of longitudinally displaceably arranged machine parts, which have pressure pockets for hydraulic fluid for building up a hydrostatic pressure between two machine parts, gaps for the hydraulic fluid which are adjacent to the pressure pockets and are delimited by gap faces of the two machine parts, drainage for the reception of hydraulic fluid, and at least one seal, arranged between the machine parts and surrounding the drainage sealing against leakage of hydraulic fluid out of the hydrostatic mounting. At least one circumferential portion of the seal has an outer sealing lip and an inner sealing lip. The inner sealing lip is adjacent to the gaps, and a vacuum-loadable drainage portion of the drainage is arranged between the two sealing lips. | 03-18-2010 |
20100067836 | HYDROSTATIC MOUNTING - A hydrostatic mounting of longitudinally displaceably arranged machine parts, which have pressure pockets for hydraulic fluid for building up a hydrostatic pressure between two machine parts, gaps connected to the pressure pockets and delimited by gap faces of the two machine parts, a drainage for the reception of hydraulic fluid flowing out from the gaps, and a seal, arranged effectively between the machine parts and surrounding the gaps, sealing against the escape of hydraulic fluid. An environment-side portion of the seal is at the same time a portion of the drainage creating a double-acting portion. The double-acting portion of the seal is formed from a material permeable to the hydraulic fluid. | 03-18-2010 |
20100092113 | STATIC PRESSURE SLIDER AND TRANSFERRING DEVICE AND PROCESSING DEVICE PROVIDED WITH THE SAME - The present invention relates to a static pressure slider including a stationary member | 04-15-2010 |
20100098356 | GAS THRUST BEARING AND ASSOCIATED PRODUCTION METHOD - A gas-pressure bearing including a mounted body, a cavity accommodating the mounted body, and a bearing bush surrounding the cavity. The bearing bush includes a wall, a plurality of supply passages formed in the wall and configured such that compressed gas can be externally applied. The bearing bush includes a plurality of elements joined together, and at least some of the plurality of supply passages are formed by grooves in at least one surface of mutually facing surfaces of adjacent elements of the plurality of elements. | 04-22-2010 |
20100150482 | LOW-FRICTION SLIDE MEMBER, PRODUCTION APPARATUS THEREFOR AND PROCESS FOR PRODUCING THE SAME - According to one aspect of the present invention, there is provided a low-friction sliding member having a sliding surface slidable relative to an opposing member via an oil, wherein the sliding surface has a plurality of texture groups, each of the texture groups consists of at least two adjacent fine recesses having portions aligned to each other in either a sliding direction or oil flow direction; a distance between the texture groups is larger than a distance between the adjacent recesses; and the texture groups is distributed uniformly over the sliding surface. | 06-17-2010 |
20100290724 | SELF-COMPENSATING HYDROSTATIC PLANAR BEARING DEVICE AND THE METHOD THEREOF - A self-compensating hydrostatic planar bearing device comprises: a flow restrictor, disposed on a slide-table, having a flexible supporting unit extendedly formed on an end thereof; a first chamber, formed on another end of the flow restrictor opposite to that of the flexible supporting unit for communicating with a pipe disposed penetrating through the flow restrictor; and a second chamber, formed between the supporting unit and the slide-table for communicating with the first chamber through a communication hole. Operationally, when the load is changing, the pressure to the first chamber will be changing accordingly while the pressure change will be transferred to the second chamber through the communication hole for causing the flexible supporting unit to deform and thereby further causing the volume of the first chamber to change so that the pressure of the first chamber is consequently changed therewith and thus accomplishes a self-compensating process of the bearing's stiffness. | 11-18-2010 |
20100329593 | HYDROSTATIC SUPPORT FOR LARGE STRUCTURES AND IN PARTICULAR FOR LARGE TELESCOPES - Hydrostatic support for large structures, particularly suitable for large telescopes, wherein is present a hydraulic preloading chamber and a restraining shaft to obtain high static, dynamic rigidity and allow the tilt movements without sliding surfaces, and wherein are present solutions suitable for allowing high supply pressures and reduced oil consumption. | 12-30-2010 |
20100329594 | LARGE TELESCOPE ELEVATION STRUCTURE LATERAL HYDROSTATIC GUIDANCE SYSTEM - Large structure lateral hydrostatic guidance system, particularly suitable for realising the lateral guidance system of the elevation axis of a large telescope made with at least two guide rings, characterised in that all the hydrostatic supports are tilting and floating and have a hydraulic preloading chamber acting between the base and the runner, connected together so as to achieve an isostatic and uniform sharing out of the loads acting on the structure. | 12-30-2010 |
20110103722 | LINEAR SLIDE TABLE - A linear slide table includes a slide rail, a loading table, at least one adjustment base, a plurality of wedges, and a plurality of adjustment elements. The loading table is disposed on the slide rail. The adjustment base is assembled below the loading table and disposed at one side of the slide rail. The wedges are disposed between the adjustment base and the loading table. The adjustment elements interconnect the wedges and the loading table for adjusting the relative positions of the wedges and the loading table, so as to adjust the distance between the adjustment base and the slide rail through the wedges pushing the adjustment base. | 05-05-2011 |
20110262058 | Air-bearing slide platform having positioning module - An air-bearing slide platform having a positioning module includes: at least one slide guide, a carrier mounted on the slide guide, at least one first air bearing provided between an upper surface of the slide guide and the carrier, and the positioning module provided on the slide platform. The air-bearing slide platform is characterized in that the positioning module includes a pair of ramps formed at two lower sides of the slide guide, and at least one second air bearing provided between two extended lower sides of the carrier and the ramps. | 10-27-2011 |
20120230616 | SEAL FOR A HYDROSTATIC LINEAR GUIDE | 09-13-2012 |
20120301060 | STATIC-PRESSURE BEARING APPARATUS AND STAGE COMPRISING STATIC-PRESSURE BEARING APPARATUS - A highly accurate static-pressure bearing apparatus that prevents vibrations may be achieved by configuring the apparatus comprising an orifice and a vent groove, etc., such that a laminar-flow status may be maintained in the entire region of the routes of the ventilated pressurized gas. A stage equipped with the static-pressure bearing apparatus is also provided. The configurations, such as the shapes of the orifice | 11-29-2012 |
20130108192 | VARIABLE FLOW-RATE HYDROSTATIC BEARING | 05-02-2013 |
20130301961 | GAS-EJECTING BEARINGS FOR TRANSPORT OF GLASS SHEETS - Non-contact, gas-ejecting bearings ( | 11-14-2013 |
20140016886 | SPLIT TYPE AEROSTATIC BEARING - A split-type aerostatic bearing for supporting a moving table to move frictionlessly on a platform ( | 01-16-2014 |
20140153847 | HYDROSTATIC GUIDE DEVICE AND MACHINE TOOL USING THE HYDROSTATIC GUIDE DEVICE - A hydrostatic guide device includes: a fixed member having vertical guide faces; a movable member having vertical slide faces; a fluid supply device; a hydrostatic pocket to which a first fluid pressure based on a dimension of a gap is applied, and that urges the movable member with a first urging force; and a hydraulic pocket to which a second fluid pressure based on a dimension of a gap is applied, and that urges the movable member with a second urging force. A variation of the second fluid pressure is smaller than a variation of the first fluid pressure. When the first urging force and the second urging force are balanced with each other in a horizontal direction, the gap between the vertical guide face and the vertical slide face becomes a set value. | 06-05-2014 |
20140314345 | GAS PRESSURE BEARING ELEMENT - A gas pressure bearing element including a housing element with recesses, wherein the housing element is closed by a cover, wherein the recesses are defined by rib shaped intermediary walls and/or other island shaped protrusions and define first intermediary spaces between the intermediary walls and/or the island shaped protrusions, wherein the cover is formed in sections by a cured encasement compound provided with an open pore reinforcement mat, wherein the encasement compound has a flat surface that is processed after curing and forms a bearing surface for the gas pressure bearing element, wherein the bearing surface includes a plurality of gas outlet nozzles which are formed by micro holes penetrating the cover, and wherein the micro holes are provided at locations under which the first intermediary spaces are arranged below the cover, which first intermediary spaces form channels for a pressurized gas supply for the gas outlet nozzles. | 10-23-2014 |
20150023617 | HYDROSTATIC BEARING - A hydrostatic bearing adapted to be mated with a base includes a floating seat and a holder. The floating seat is made from a porous material and formed with a bearing surface that has a contour conforming to that of the base. The holder is coupled to the floating seat and cooperates with the floating seat to define an accommodating space for accommodating pressurized air. A pressurized air film is formed between the base and the bearing surface of the floating seat when the pressurized air discharges from the accommodating space through the floating seat so as to separate the floating seat from the base and so as to support the base. | 01-22-2015 |
20150345552 | AEROSTATIC BEARING - An aerostatic bearing includes a base having a foundation layer and a plurality of ventilation bodies protruding from the foundation layer, the ventilation bodies being made of a porous material; and a sealing layer covering the base and revealing at least one of the ventilation bodies. | 12-03-2015 |
20160069386 | HYDROSTATIC PROFILED RAIL GUIDE - A hydrostatic profiled rail guide, having a guide carriage ( | 03-10-2016 |
20160115993 | GUIDE MECHANISM OF MACHINE TOOL AND MACHINE TOOL - A guide mechanism for a machine tool includes a movement member and a guide member in a form of first and second rails the movement member and the guide member relatively movable to each other. A hydrostatic pressure guide mechanism and a sliding guide mechanism are formed between the movement member and the first and second rails. The hydrostatic pressure guide mechanism includes a static pressure chamber, a seal portion sealing a periphery of the static pressure chamber, and a supply passage configured to supply a lubricating oil into the static pressure chamber. | 04-28-2016 |
20160115994 | HYDROSTATIC PRESSURE GUIDE MECHANISM AND MACHINE TOOL - A hydrostatic pressure guide mechanism includes: a guide member having a smooth guide surface; a movement member having a slide surface facing the guide surface and an annular placement groove formed on the slide surface; an annular seal member (hermetically closing member) that is disposed in the placement groove and capable of hermetically contacting with the guide surface; an oil supply structure configured to supply an oil into a static pressure pocket on the slide surface surrounded by the seal member; and an oil recovery structure configured to recover the oil from the static pressure pocket, in which the oil recovery structure has a recovery hole that is formed in the static pressure pocket and is opened on the slide surface. | 04-28-2016 |
20160186802 | VARIABLE-THROTTLE HYDROSTATIC BEARING - A variable-throttle hydrostatic bearing includes a diaphragm that faces a protruding portion via a predetermined gap and a discharge port formed in the protruding portion so as to communicate with a hydrostatic pocket, and adjusts a throttle amount based on the size of a gap between the diaphragm and the protruding portion. The variable-throttle hydrostatic bearing further includes a piston that contacts, at its first end, a surface on the opposite side of the diaphragm from a surface that faces the protruding portion, a cylinder that holds the piston such that the piston is slidable and forms a fluid chamber along with the piston, and a coil spring housed in the fluid chamber to press a second end of the piston. | 06-30-2016 |
20180023624 | STATIC PRESSURE GAS BEARING | 01-25-2018 |