Abstract: A rotary compressor includes a cylinder having a cylinder chamber and bush groove, a piston housed in the cylinder chamber, a blade formed with the piston to separate the cylinder chamber into low and high pressure chambers, and a pair of bushes. The bushes are fitted in the bush groove with flat surfaces facing each other to hold the blade. The flat surface of at least the bush on the low-pressure side has a crowned portion starting from a position closer to the back pressure space than a swing center position, and extending toward an edge of the bush closer to the cylinder chamber. The swing center position is where a gap between the blade and the bush is constant while the piston rotates eccentrically.

Abstract: Provided are X-Y constraining units having excellent yawing attitude precision as well as a stage apparatus and a vacuum stage apparatus, each including the X-Y constraining units. The X-Y constraining units 8 and 9 includes: Y-axis bases 81 and 91 respectively connected to Y-axis sliders 4 and 5 and having a through hole extending along Z direction; X-axis bases 82 and 92 respectively connected to an X-axis guide rail 6; shafts 83 and 93 respectively inserted into the through hole and fixed to the X-axis bases 82 and 92; and a plurality of bearing balls which are located between an inner peripheral surface of each of the through hole and an outer peripheral surface of the shafts 83 and 93, and are arranged so as to circumferentially surround the shafts 83 and 93. Each of the stage apparatus 1 and the vacuum stage apparatus includes the X-Y constraining units.

Abstract: A bearing assembly (2?) comprising a housing (3?) supporting first and second bearing ring portions (4, 4?) with bearing surfaces to engage an inner tubular member (1?) at axially spaced regions, characterized in that either: the bearing ring portions are provided by separate bearing rings (4?) supported in the housing member (3?) with bearing surfaces of different diameters; or the bearing ring portions are provided by a single bearing ring (4?) that is free to flex radially and is supported so that the second bearing ring portion is free to flex radially under load and its bearing surface than assumes a position with a greater diameter than that of the first bearing ring portion (4?).

Abstract: An extendible axle member (146 or 148) is provided for a pivoting axle of an agricultural harvester (100), the extendible axle member (146 or 148) having an elongate telescopic portion (400) with bearing surfaces for being slidably received in an outer axle member (142 or 144), wherein the elongate telescopic portion (400) is formed integral with and abuts a C-frame for supporting a steering knuckle (158 or 160).

Abstract: The invention relates to a tumble disc bearing (100) to provide an efficient axial bearing for a rotating anode (216) of an X-ray source (212) having a tumble disc (102) for axially bearing the rotating anode (216), and a mounting component (120) for supporting the tumble disc (102). The mounting component (120) comprises an inner mounting face (122) for attaching to a supporting structure (194, 204). The mounting component (120) is supported in the tumble disc (102) at a tumble position (140) in which an inner supporting face (104) of the tumble disc (102) matches an outer supporting face (124) of the mounting component (120) such that the tumble disc (102) is enabled to perform a tumble motion in all directions in relation to the mounting component (120). The mounting component (120) is adapted to be inserted in an inserting position (142) traverse to the tumble position (140) into the tumble disc (102).

Abstract: A bearing assembly (2?) comprising a housing (3?) supporting first and second bearing ring portions (4, 4?) with bearing surfaces to engage an inner tubular member (1?) at axially spaced regions, characterised in that either: said bearing ring portions are provided by separate bearing rings (4?) supported in the housing member (3?) with bearing surfaces of different diameters; or said bearing ring portions are provided by a single bearing ring (4?) that is free to flex radially and is supported so that the second bearing ring portion is free to flex radially under load and its bearing surface than assumes a position with a greater diameter than that of the first bearing ring portion (4?).

Abstract: A slide guide apparatus of a press machine, which guides reciprocating motion of a slide of the press machine by a sliding surface provided between a guide member and the slide, wherein a slide member that is rotatable about a predetermined rotation center axis and a slide member holder that rotatably holds the slide member and is rotatable about a rotation center axis transverse to the predetermined rotation center axis are provided between the guide member and the slide, and a flat portion of the slide member is adapted to function as the sliding surface.

Abstract: An extendible axle member (146 or 148) is provided for a pivoting axle of an agricultural harvester (100), the extendible axle member (146 or 148) having an elongate telescopic portion (400) with bearing surfaces for being slidably received in an outer axle member (142 or 144), wherein the elongate telescopic portion (400) is formed integral with and abuts a C-frame for supporting a steering knuckle (158 or 160).

Abstract: A slide guide apparatus of a press machine, which guides reciprocating motion of a slide of the press machine by a sliding surface provided between a guide member and the slide, wherein a slide member that is rotatable about a predetermined rotation center axis and a slide member holder that rotatably holds the slide member and is rotatable about a rotation center axis transverse to the predetermined rotation center axis are provided between the guide member and the slide, and a flat portion of the slide member is adapted to function as the sliding surface.

Abstract: A bearing assembly having upper and lower bearing seats and a sliding load bearing member between the seats. The sliding member is fitted with an elastic self-centering element. The assembly in operation damps relative horizontal movement between the upper and lower seats, the self-centering element returning the sliding member to a centered position at rest. Typically a structure rests upon and is secured to the upper seat and the lower seat rests upon or is fixed to a foundation. The relative horizontal movement may be caused by earthquakes, wind loads or the like.

Abstract: A flexible shoe assembly for use in a molding system. The clamp unit of a molding system includes a moving platen and a stationary platen supported by a frame. Tie bars interconnect the moving platen with the stationary platen. The tie bars are secured to the stationary platen and pass through respective openings in the moving platen. Each tie bar is supported and guided within their respective openings by a flexible shoe assembly and wear pad. The flexible shoe assembly has a force redirector for directing force away from a peripheral edge of the wear pad towards a central force area. The flexible shoe assembly also includes a load distributor to distribute the load across the wear pad surface. The flexible shoe assembly includes an upper support that is flexible about a lower support to keep the wear pad in operational contact with the tie bar.

Abstract: A Cartesian gantry system having an expansion joint between an X-bridge stage and a Y-translation stage comprises a flexure plate having surfaces secured to the X-bridge stage and the Y-translation stage and bolster flanges extending between the X-bridge stage and Y-translation stage to resist twisting or rotation of the X-bridge.

Abstract: A first component includes either linear bearings or linear shafts that are located at a fixed hole-to-hole or center-to-center distance. A second component, having linear shafts or linear bearings, respectively, is capable of adjusting the center-to-center or hole-to-hole distance of those second linear shafts or linear bearings. The center-to-center or hole-to-hole distance can be adjusted by relative motion between a first sub-component and a second sub-component of the second component, and/or deforming an elastically-deformable element of the second component. The second component can include a rigid stabilizing element and an elastically-deformable element.

Abstract: A unified memory controller (UMC) is disclosed. The UMC may be used in a digital television (DTV) receiver. The UMC allows the DTV receiver to use a unified memory. The UMC accepts memory requests from various clients, and determines which requests should receive priority access to the unified memory.

Abstract: A supporting device (300) for supporting a guide rail (200) for guiding a movable member subjected to relative displacement in relation to the base table (3). The supporting device includes, base bodies (410, 510) engaged onto the base table (3) and carrying the guide rail (200), and holding section (440, 530) for holding the guide rail (200) intervening between the guide rail (200) in the state where the guide rail is carried by the base bodies (410, 510). The holding section (440, 530) supports the guide rail (200) in the state where it can move swingingly. A change in the posture or position of the base bodies (410, 510) is offset with a swinging movement by the holding section, and does not affect the guide rail. As a result, excessive force is not applied on the guide rail, so that the form of the guide rail is maintained.

Abstract: A plain bearing for guiding a rail comprises a bearing housing (4) displaying a single, cylindrical through-opening (5), and a sliding element (6), which is supported in the through-opening (5) and which forms a sliding opening (7), in which the rail (2), by means of a rail head (9), is mounted in displaceable fashion, where the through-opening (5) and the sliding opening (7) are laterally open towards the outside at an angle ? formed by an engaging opening (10), through which the rail head (9) of the rail (2) can engage the sliding opening (7). To reduce wear and permit a low design height, the sliding opening (7) displays a polygonal cross-section, where at least one of the interior side surfaces (11) of the sliding element (6) that delimit the sliding opening (7) is essentially perpendicular to the greatest force expected during operation and transmitted via the sliding element (6) to the rail head (9).

Abstract: The present invention provides a slide guide for a press which comprises a gib structure with a spherical surface. The gibs are formed on a frame of the press. The spherical surface is provided with a holder or a cap to cover the spherical surface. The surface contacts are formed between the spherical surface bodies and the gibs or between the caps and the gibs. Forming spherical contact surfaces prevents damage to the sliding surface. This slide guide provides uniform, secure contact at a sliding surface of a press and prevents uneven contact. The spherical surface body can be easily installed and can adapt to deformation of the slide and prevent damage to the sliding surface.

Abstract: A link mechanism to establish the position of a spherical bearing and the direction of an arm extending from the bearing is provided, which mechanism has a high precision of position and direction determination, does not require strong actuators, and is mechanically easy to accommodate MR compatibility, to be cleanable and to be sterilizable. The link mechanism has: an axial rod; and two spherical bearings to support the axial rod, the two spherical bearings being capable of changing relative positions, wherein the motion of one of the two spherical bearings relative to the axial rod along the axis is constrained, and the other of the spherical bearings can travel along the axial rod.

Abstract: The object of this invention is to provide a mechanical press that presents no inconvenience in press operations despite its low height, providing great stability and excellent durability. The invention comprises a slide guiding mechanism provided at an upper part of the adjusting member for converting the rotary motion of the eccentric part of the crankshaft into a linear reciprocating motion and a position adjusting mechanism provided at a lower part, as well as an adjusting member that advances and retracts relative to the slide, which serves for the prevention of rotation and guidance.

Abstract: The invention relates to a movable bearing for a slide (9) guided on two shafts (4), with a linear bearing (3) guided on one of the shafts (4) and a bearing housing(2) that accommodates the linear bearing (3) and is connected to the slide (9) by a connector (1). In order to further develop a movable bearing of this kind such that the bearing offers a long service life, precise guidance of the slide parallel to the plane defined by the two shafts and relatively little assembly effort with correspondingly low assembly costs, a movable bearing is provided which has a connector (1) designed in such a way that the bearing housing (2) is mounted in a manner permitting movement transverse to the longitudinal direction of the respective shaft (4) and parallel to the shaft plane (7) defined by the axes (5, 6) of the two shafts (4).

Abstract: A slide guide device for a press guides a slide in a cycle. The slide guide device eliminates eccentric force misalignment and prevents eccentric contact between the slide and a gib. The slide includes at least a first spherical shoe having at least a first guide surface. The gib includes at least a first sliding surface opposite the first guide surface. During operation, the spherical shoe rotates relative to the slide to provide automatic planar alignment between the first guide surface and the sliding surface. A wedge supports the gib to allow rapid and easy alignment with the slide.

Abstract: In order to provide durable shock absorbers, a bearing to bear a piston rod is enhanced in wear resistance and made low in friction. A cylindrical-shaped bearing for reciprocatory sliding, to bear a piston rod comprises lengthy inclined portions and a short parallel portion on an inner-peripheral surface of the bearing.

Abstract: The invention relates to a movable bearing for a slide (9) guided on two shafts (4), with a linear bearing (3) guided on one of the shafts (4) and a bearing housing(2) that accommodates the linear bearing (3) and is connected to the slide (9) by a connector (1). In order to further develop a movable bearing of this kind such that the bearing offers a long service life, precise guidance of the slide parallel to the plane defined by the two shafts and relatively little assembly effort with correspondingly low assembly costs, a movable bearing is provided which has a connector (1) designed in such a way that the bearing housing (2) is mounted in a manner permitting movement transverse to the longitudinal direction of the respective shaft (4) and parallel to the shaft plane (7) defined by the axes (5, 6) of the two shafts (4).

Abstract: A middle liner of a slide guide device for a machine press has a spherical shaped side which fits into a sliding gib attached to a slide. The middle liner slides along a fixed gib at first and second linear surfaces that are at an angle with each other. The combination of self-alignment and smooth movement of the slide is achieved in the presence of an eccentric load acting on the slide. A machine press equipped with such a slide guide device has excellent eccentric load resistance and high working precision. In a further embodiment, a press machine is further equipped with a knockout device having knockout block moving between a pair of guide rails. A plurality of middle liners, each having at least one spherical surface, are positioned between the knockout block and the guide rails. The resulting knockout device provides a stable knockout load with low noise and low energy consumption.

Abstract: The expandable rack bushing has a tubular portion with front slots and rear slots. An axial overlap between the front and rear slots permits expansion and retraction of the tubular portion. Retainer blocks on the tubular portion are received in a radial groove in a rack and pinion housing to axially fix the rack bushing. When the steering rack is positioned in the rack bushing, the retainer blocks cannot be removed from the radial groove. Radial forces on the steering rack expand the rack bushing and move the steering rack toward one side of the rack housing bore. Spring fingers absorb energy as the rack bushing is expanded. These spring fingers continuously urge the steering rack toward the housing bore center.

Abstract: Balls are supported between the spherical inner race (5) and the outer race (6) which surrounds one potion of the inner race (6)through the resiliently transformable shell-like retainer (7). By making the inner race (5) and outer race (7), which influence the bearing precision greatly, to be formed in a unit respectively, the bearing precision is increased. For reference, although the retainer is divided, the retainer (7)bears merely the ball holding function and its transformation and the position relation in assembling state do not influence the bearing precision.

Abstract: A linear bushing attachable to a structural member is formed of a tubular body having a tail part and a lead part forward of said tail part, the tubular body defining a cylindrical wall about a central longitudinal axis and having inner and outer surfaces. First and second sets of resiliently bendable arms extend respectively from the lead part and from the tail part, the arms of each set being spaced apart circumferentially and extending generally forwardly and radially inwardly. The arms of each set have distal ends with inner surfaces which define a bore of first diameter, these arms of each set being deflectable radially outward to define between the inner surfaces of their distal ends a bore of greater diameter than the first diameter. Each of these arms when deflected radially outward applies a resilient opposite radially inward force.

Abstract: The technical field of the invention broadly relates to molding systems, and more particularly to a flexible shoe assembly for use in a molding system. The clamp unit of a molding system includes a moving platen and a stationary platen supported by a frame. Tie bars interconnect the moving platen with the stationary platen. The tie bars are secured to the stationary platen and pass through respective openings in the moving platen. Each tie bar is supported and guided within their respective openings by a flexible shoe assembly and wear pad. The flexible shoe assembly has a force redirector for directing force away from a peripheral edge of the wear pad towards a central force area. The flexible shoe assembly also includes a load distributor to distribute the load across the wear pad surface. The flexible shoe assembly includes an upper support that is flexible about a lower support to keep the wear pad in operational contact with the tie bar.

Abstract: A linear slide assembly which includes a pair of parallel stationary ways and a carriage. A pair of parallel traveling ways are mounted to the carriage. One traveling way is mounted to the carriage by a fixed mounting and the other is mounted to the carriage by a laterally-compliant mounting. The laterally-compliant mounting includes a compliant mounting bar mounted to the carriage with flexures that allow some lateral movement. The compliant mounting also includes a stop that limits the lateral movement of the compliant traveling way.

Abstract: A frit-sealing apparatus for a cathode-ray tube has a nozzle portion being inserted into and withdrawn later from the cathode-ray tube supported in a certain position; a guide block for supporting the nozzle portion; a guide rod for supporting the guide block so as to slide in directions in which the nozzle portion is inserted and withdrawn; and a rotation restriction member being in contact with an outer surface of the guide block, thereby restricting rotation of the guide block.

Abstract: The invention is a linear guide system having a flexure that absorbs internal stresses in the system while still maintaining sufficient rigidity required for a precise linear guide system. These internal stresses may be caused by thermal expansion of components, misalignment of guide rails or vibration of components during operation. The guide system comprises at least two parallel extending guides supported by a base. Slidably attached to the guides are a plurality of pucks or sliders. In addition, the system includes at least one movable slide plate positioned above the pucks by two sets of vertical supports. The first set of vertical supports fix the slide plate to the pucks in both a horizontal and vertical direction while the second set of vertical supports fix the slide plate to the pucks in only the vertical direction. Finally, the guide system includes at least one flexure, consisting of a thin metal plate.

Abstract: Guide-ring arrangement on a cylindrical guide part for the relative guiding of an elongate guided part having a guide ring where the rear surface projects in a convex manner.

Abstract: A slide bearing including an assembly of slide pads compressively mounted within a housing. The bearing allows a pipe to be held such that it may slide through the bearing whilst still accommodating lateral and pitch variations.

Abstract: A height adjustment system for a desk, workstation or the like is provided comprising a plurality of height adjustable legs each having a first part in the form of a hollow column and a second part movable relative to the first part in a vertical direction. The second part of each leg includes a gearbox housing containing a crown gear provided on a vertically extending rotatable shaft and at least one pinion gear engageable with said crown gear. The vertical shaft includes a screw-threaded portion engaged by nuts on a base plate of the column. A winding mechanism is provided for rotating a horizontally extending shaft on which the pinion gear is provided. Rotation of the horizontal shaft causes the vertical shaft to rotate thereby moving the second part relative to the column so adjust the height of a top member secured on the gearbox housing.

Abstract: An armrest adjusting mechanism is disclosed which includes a base plate mountable to an article of construction machinery and a first working plate movable relative to the base plate. First and second shafts are mounted to the first working plate. The first shaft is guided by first and second spherical bearings fixedly mounted to the base plate. The second shaft is guided by a third spherical bearing adjustably mounted to the base plate. The third spherical bearing is attached to a third shaft which is disposed normal to the first and second shafts. A cylindrical bearing guides the third shaft as it moves in response to misalignment between the first and second shafts. In a similar manner, fourth and fifth shafts are mounted to the first working plate. The fourth shaft is guided by fourth and fifth spherical bearings fixedly mounted to a second working plate. The fifth shaft is guided by a sixth spherical bearing adjustably mounted to the second working plate.

Abstract: A gantry robot protection apparatus for protecting the bearings of a gantry robot from contamination.

Abstract: This invention relates to a support assembly which is to be used in association with a sealing arrangement to support a member which is movable with respect to a base element.

Abstract: The present invention relates to an assembly, especially an assembly which provides precision guidance of a lighting member.

Abstract: An alignment compensation system for use with parallel linear bearings which isolates the linear motion system load or carriage plate from alignment errors in the system. Spherical bearings are mounted in bearing blocks, each spherical bearing having a support shaft therethrough to support a plate connected to a carriage or load plate. One of the bearings shafts is free to laterally float within its bearing block, thus providing for compensation of lateral misalignment of the linear bearing track. The other spherical bearing is held fixed within its bearing block. The linear system load or carriage plate is mounted on the spherical bearing shafts, thus isolating the carriage plate from alignment errors in the linear motion system.

Abstract: A precision positioning stage assembly, comprising a movable stage, a drive screw having it axis parallel to the direction of movement of the stage, a follower threadably engaged with the drive screw, and a linear guide rail for supporting one side of the stage. The linear guide rail has its axis parallel to the direction of movement of the stage. A drive member is secured to the stage which has a pair of oppositely disposed contact surfaces spaced apart a predetermined distance. A torque member is secured to the follower, the torque member having a drive section for placement between the contact surfaces and moving the stage along the guide rail. The drive section and the contact surfaces have a configuration so as to provide substantially point contact therebetween.

Abstract: A roller type linear movement guiding device comprises: a plurality of roller type linear movement guiding bearings each having a number of rollers which circulate infinitely while rolling on a flat track surface; a holding board holding the bearings on the flat track surface; a table fixing board mounted over the holding board; and a steel ball inserted in recesses formed in the opposed surfaces of the holding board and the table fixing board at the load centers, so that the table fixing board is poised statically through the steel ball. With the device, even when the table fixing board is inclined, the holding board is held poised statically, whereby the roller type linear movement guiding bearings will never be twisted.

Abstract: In a co-ordinate measuring machine, a linear guideway comprises two tubular guides 14, 16 mounted on a column 10 in a parallel spaced apart relation and extending in a direction parallel to the longitudinal axis of the column 10. The guides 14, 16 are mounted on the column 10 by a plurality of elongate bars 20 formed for example of carbon fibre. The bars 20 are so designed as to allow change in relative length between the guide 14 and the column 10 but to retain the guide 14 in a rigid relation to the column 10 in a direction along the axis of each of the bars 20. The guide 16 is mounted on the column 10 by a plurality of pairs of bars 50 similar to the bars 20. Each of the guides 14, 16 is anchored relative to the column 10 at one respective end. A carriage 12 is slidably mounted on the guides 14, 16 by suitable bearings and requires five degrees of restraint and one degree of freedom in the axial direction of the guides 14, 16.

Abstract: A seal assembly for use in establishing a seal between the pump rod of a down the hole pump and the upper end of a bore casing. The seal assembly having a stuffing box supported by a body through which the pump rod extends. The stuffing box being mounted on a guide member having a ball section with the pump rod extending axially therethrough. The ball section being seated in bearings located in a chamber in the body so that the guide member and stuffing box may pivot relative to the body to accommodate angle misalignment of the pump rod. The bearings having freedom for lateral movement in the body chamber to establish axial alignment of the stuffing box with the pump rod.

Abstract: A compressed gas and a liquid are contained in a cylinder. A liquid chamber containing the liquid and a gas chamber containing the gas are divided by a metallic bellows. The liquid chamber is situated on the side of an open end of the cylinder. A rod is inserted in the cylinder. A sealing assembly is provided at the open end of the cylinder. The sealing assembly has a bearing member at only one portion of the cylinder with respect to the axial direction thereof. A space extends throughout the circumference between the outer peripheral surface of the inner end of the rod and the inner peripheral surface of the cylinder. A seal device for sealing the liquid in the liquid chamber includes a seal ring intimately in contact with the outer peripheral surface of the rod and an elastomer ring provided on the outer peripheral surface side of the seal ring and capable of elastic deformation in the radial direction of the rod. The rod can swing within the range of an angle .theta.

Abstract: A guided member is engaged with a guiding member and the guided member and guiding members are movable relative to each other. A pair of planar, parallel guide surfaces on the guide member are engaged by a pair of bearings mounted on the guided member. One of the bearings is resiliently biased into engagement with the guide surface which is less precisely formed so that irregularities in that guide surface or lack of parallelism between the guide surfaces is accommodated by displacement of the biased bearing. The bearings are mounted on bearing supports which depend from either side of a cross piece. The cross piece is secured to the guided member such that a portion of the cross piece is uncoupled from the guided member and is free to be deflected, thus providing the biasing for the biased bearing without transmitting stress to the guided member. Preferably, the apparatus is employed in a machine tool to guide the movement of a worktable.

Abstract: A linear slider may be formed essentially from a block and two parallel shafts mounted through the block. The first shaft runs on coaxial bushings, while the second shaft runs in a single floating bushing. The floating bushing slides perpendicular to the first shaft. The first and second shafts are then coupled to slide as a pair. The first shaft is then free to run back and forth. The second shaft also runs back and forth, but prevents the first shaft from rotating, without binding between the two shafts. Seals and a lubrication system are added to assure a smooth, durable action.

Abstract: A linear unit for manipulation devices and comprising a housing part having a passage therethrough for receiving a spindle sleeve and a cylindrical bore longitudinally intersecting the passage and for receiving the two bearing elements that support the spindle sleeve for displacement in the passage, the cylindrical bore having a longitudinal axis at least partially lying in a plane in which the longitudinal edge of the spindle sleeve and the longitudinal axis of the spindle sleeve lie, and forming an acute feed angle with the longitudinal axis of the spindle sleeve.

Abstract: A shaft is supported to slide in a linear bearing which, in turn, is supported within a bore in a pillow block housing. To enable the bearing to self-align with a bearing in a paired pillow block housing, the bore of the housing is longitudinally crowned and permits the bearing to rock universally within a limited range while still maintaining rigidity and precise centerline accuracy.

Abstract: A guide arrangement in linear power units having a housing (1) and a slide (2) linearly movable relative to the housing, and is designed to relieve the slide of transverse forces, lateral forces etc., in order to reduce wear and eliminate jamming. According to the invention, this is achieved in that at least one guide rail (6) is arranged parallel to the direction of action of the linear power unit, that the housing (1) is fixedly connected to the guide rail (6), and that the slide (2) is hingedly connected in a manner to transmit push and pull forces only, to a guide device (7) guided on the guide rail (6).

Abstract: A self-aligning fluid bearing for supporting a moving part, and allowing that part to move along at least one flat support surface substantially without friction, includes a body with at least one planar face having at least one spheroidal concave depression therein, channels within the body for directing pressurized fluid to each depression, and one planoconvex disk for each depression. Each disk includes a convex spheroidal surface with a spherical radius which is approximately equal to that of the corresponding concave depression and an oppositely facing planar surface so that the convex surface of the disk is located in spaced relation to the depression surface when pressurized fluid is directed into the depression.