Abstract: A spindle motor having a hydrodynamic pressure bearing includes a stator, a rotor, and a dynamic pressure generating unit including a sleeve having an upper plate disposed opposite to the rotor and at least one thrust dynamic pressure groove formed either at the upper plate of the sleeve or at the rotor. Inside width from a neutral radius to an innermost radius of the thrust dynamic pressure groove is larger than outside width from the neutral radius to an outermost radius of the thrust dynamic pressure groove such that the neutral radius is biased to the outside of the thrust dynamic pressure groove. Dynamic pressure at the inside width of the thrust dynamic pressure groove is higher than dynamic pressure at the outside width of the thrust dynamic pressure groove such that fluid supplied into the thrust dynamic pressure groove is guided to the outer diameter side.

Abstract: A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is superposed on the upper casing (3) so as to be rotatable about an axis (O), and has an synthetic resin-made annular surface (4) opposed to the annular surface (2); and a synthetic resin-made annular sheet (6) which is interposed between the annular surfaces (2) and (4) and slidably abuts against at least one of the upper casing (3) and the bearing body (5).

Abstract: A bearing device mountable on a smaller bearing and allowing to be automatically lubricated for a long period, comprising an inner ring and an outer ring rotated relative to each other, cages and rolling elements held by the cages which are disposed in an annular space between the inner and outer rings, a seal ring disposed on both sides of the inner and outer rings, and a unit body formed of a battery, a tank for storing lubricant, and a pump sucking and discharging the lubricant from the tank which is disposed between the outer ring and the inner ring detachably from the seal ring, wherein the lubricant is discharged from the pump into the annular space in which the rolling elements are disposed and the discharged amount of the lubricant from the pump is controlled by a sensor and a control circuit, and the unit body is formed detachable, whereby a lubrication unit installed in the bearing can be made compact and slim.

Abstract: A self-aligning bearing assembly is disclosed which is capable of reacting both radial and axial loads. An inner bearing race is connected to a rotatable shaft that is subjected to such loads. An outer bearing race is installed within a housing and is capable of movement in multiple directions with respect to the housing. The outer bearing race can rotate in planes corresponding to longitudinal sections of the outer race, i.e., rotational displacement. In addition, the outer bearing race can translate with respect to an inner wall of the housing in an axial direction of the housing, i.e., axial displacement. Such movement is enabled by the use of radially displaceable thrust rings which contact the outer bearing race, and control of the geometry of the outer bearing race and inner wall of the housing.

Abstract: A metal chassis including a laser diode (LD) and a photodiode (PD) is held at a receiver ground RG, which is the potential of the anode or the cathode of the PD. Meanwhile, a receptacle for removing an optical fiber is held at a frame ground FG of a separate frame. Lead pins of the LD are insulated from the metal chassis. The receiver ground RG and the frame ground FG are insulated from each other by an insulative member. Since the receiver ground RG is insulated from the LD and the frame, a receiver is not easily affected by inner noise and outer noise. Accordingly, a bidirectional optical module having reduced influence of forward radiated noise, LD/PD crosstalk, and the outer noise is provided.

Abstract: A method of adjusting the attachment of an optical fiber to a laser diode chip within a butterfly package, or any equivalent package, identifies the location of the solder attachment on the optical fiber, thereby moving one or more high power lasers so that their respective beams are incident on the solder attachment. Then, with the application of high power laser pulses according to a predetermined pulse schedule, the solder attachment is heated so that the optical fiber may shift vertically therein. By using an internal or external monitoring means such as an optical power meter, a determination is made when the optical alignment has reached a desired threshold such as when it exceeds a desired optical power output. The pulse schedule may be performed multiple times until a substantially optimized coupling is achieved for the final package.

Abstract: A laser module used in a circular saw to guide cutting of the saw blade of the circular saw is constructed to have a hollow housing, a focal lens mounted in the housing, a laser diode mounted in the housing behind the focal lens and beyond the focus of the focal lens, a circuit board electrically connected to the laser diode, a focal lens mounted in the housing in front of the laser diode beyond the focus of said focal lens, an annular endpiece threaded into the front side of the housing to hold the focal lens and rotatable relative to the housing to move the focal lens axially relative to the laser diode and to further adjust the pattern the light spot of the laser beam from the laser diode on the workpiece.

Abstract: A lightweight collapsible, shoulder mounted camera support assembly for carrying a camcorder or camera and holding the same steady during operation has a front and rear portion for mounting a battery to counterbalance the weight of the camera or camcorder mounted on the front portion. The front and rear portions are collapsible or detachable to aid in transporting and carrying the shoulder mounted camera support. The front and rear portions are offset in such a way as to match the centerline of the camera with the centerline of the shoulder and thus aligned with the operator's eye. The front portion has an angular extension on which the camera or camcorder is mounted and is adjustable in at least one axis relative to the horizontal established by the support assembly.

Abstract: A device for marking upon a surface including a body assembly made of a resilient material, a cover member, a base assembly and a bottom cover. The body assembly has an outer wall, a central opening an upper end and a bottom end. The base assembly includes a marker rigidly attached to the center of the upper surface and a bottom surface. The upper surface is fixedly secure upon the bottom end of the body assembly in a way that the marker is housed within central opening. The bottom cover protects bottom surface. Cover member protects the upper end and the opening of the body assembly and prevents the marker from drying when the device for marking is not in use.

Abstract: A device for packaging and dispensing a substance including a drive mechanism having a first part and a second part capable of rotating around an axis relative to the first part to dispense a substance. The first or second part having an element which is axially stationary along the axis relative to the other of the first or second part. The device further including a base part in which at least part of the second part is received and an anti-rotation element secured to the second part. The anti-rotational device adapted for cooperating with the base part in such a manner as to enable the drive mechanism to move axially along the axis relative to the base part while enabling the second part to be substantially stationary in rotation relative to the base part. An elastically deformable member is included for exerting a force against the drive mechanism.

Abstract: A carabiner-type attachment for writing instruments in which the carabiner-type attachment device is attached to the side of said writing instrument or the cap therefor. The attachment device is preferably in the form of a carabiner in which at least a portion of the carabiner body is integral with a pen or pen cap. In alternative embodiments the attachment device is removable from said writing instrument or the cap of the writing instrument.

Abstract: A toothpaste dispensing toothbrush includes an elongated member and a brush section affixed to a first end of the elongated member. An elongated container is coupled to the elongated member and an outer surface of the predetermined portion and an outer surface of the container form a handle portion of the toothbrush. The container includes a housing, a chamber formed within the housing for containing toothpaste and an aperture formed within a first end of the container and in communication with the chamber for dispensing such toothpaste into the brush section when a manual force is applied to a wall portion of the container. A pair of projections formed in the elongated member and a pair of cavities formed in the container are provided for securing the container to the elongated member in a position for dispensing such toothpaste into the brush section.

Abstract: A paint striper has a main body having a head portion, an interior cavity, and a slot in fluid communication between the head portion and the interior cavity. The slot is configured for receiving a wheel, and the interior cavity is configured for receiving paint. A wheel is rotatably mounted in the slot with a portion of the wheel extending into the interior cavity. A shoulder extends from the main body, and a guide extends from the shoulder for following a guide track formed in a strip positioned on a surface of the vehicle, wherein the track is substantially parallel to the desired position of the pinstripe. The strip is secured in position on the surface of the vehicle using adhesive which permits removal of the strip from the surface of the vehicle without leaving a residue, and re-use of the strip on a surface of another vehicle.

Abstract: A dispenser head for mounting to a container body has a storage cavity to contain a predetermined volume of agent, wherein the dispenser head comprises an inserting portion adapted for slidably inserting into the container body to communicate with the storage cavity, and a head housing defining a dispensing opening extended from the inserting portion. A ball dispenser is rotatably disposed at the head housing, and a retention seat is provided at the head housing to substantially retain the ball dispenser at a position wherein the ball dispenser is rotatably received in the head housing for contacting with the agent and a portion of the ball dispenser is exposed from the head housing, so that the spherical applying surface of the ball dispenser is adapted for evenly contacting with the agent to be applied to user.

Abstract: A fluid dispensing assembly having a container body for storing a cosmetic or other fluid material, the body having a dispensing opening, an applicator protruding from the dispensing opening for receiving material from the container and applying the material, a cap matingly engagable with the container body and a fitment in the dispenser opening matingly engagable with and moveable with respect to the container body between an open position and a closed position in response to engagement with the cap, the fitment having an aperture formed therein for allowing material to exit the container body in the open position disengaged from the cap, and a case mounted thereto, the aperture at least partially closing when the cap engages the case and moves the fitment with respect to the container body.

Abstract: A ring binder mechanism has D-shaped rings formed by a straight, stationary part, and a movable mating part having an arcuate shape. A recess is formed in the tip of the movable part, and a protrusion at the tip of the stationary part seats in the recess. A lateral window in the recessed tip, intersecting the recess, enables the protrusion to seat smoothly in the recessed tip notwithstanding the fact that the relative motion between the approaching tips has a large lateral component.

Abstract: A divider element formed of a sheet member adapted to be removably coupled to a binding element of a coil bound notebook. The divider element includes a plurality of preferably T-shaped connector elements defining a narrow cut region and coil receiving aperture therebetween. Coil portions of a binding element may pass through the cut region into and out of the coil receiving aperture. The divider element is formed of a deformable material such the connector elements are adapted to be flexed out of the plane of the sheet member without substantial bending or breakage of the connector elements. The divider element may engage the coil portions of a binding element without significant manipulation of the connector elements by way of selectively urging the coil portions of a bound notebook in a direction parallel to the binding element axis.

Abstract: A telescopically adjustable pipe includes an outer tube, an inner tube, an inner bushing, a sleeve, a push member, a mounting bracket, a positioning member, and a retaining member. Thus, the positioning member is moved by movement of the push member and is detachably locked in the respective positioning hole of the inner tube to lock the inner tube in the outer tube, so that the inner tube is locked in and cannot slip from the outer tube.

Abstract: A connector system that provides a profile connection having two profiled rods that are to be connected to one another and that each comprise at least one undercut, longitudinally oriented profile groove. The connector system may include a connecting screw with a screw head and a screw shaft as well as a threaded sleeve. The connecting screw is dimensioned such that it passes through the threaded sleeve and with part of its shaft, by way of the sleeve, can be engaged with a thrust bearing piece in the profile groove of the second profiled rod. The connecting screw is fixed in the threaded sleeve by a releasable anchoring element so as to be ready for installation. Thus, an assembly unit is created that can be screwed as a whole into the profile groove of the first profiled rod.

Abstract: Precision aligning fastener for releasably joining two halves of a manufactured article. The precision aligning fastener has a male body that threads into a female body. The threads on the male and female threads, bodies are provided in an interrupted-thread pattern, allowing the male body to be completely inserted into the female body before twisting and engaging the threads. A stop means is provided, to assist in aligning and to prevent overtightening of the fastener. The fastener is particularly well-suited to releasably join long, slender articles that must be precisely aligned to function properly, such as a hunter's longbow, billiard cues, furniture, etc.

Abstract: A cover arrangement for a surface drainage device or similar hollow body is provided that is adapted to be installed in the ground and to be opened. This comprises a rectangular frame to be installed in the ground, a cover that can be inserted into the frame, hinge devices by means of which the cover is retained in the frame so that it can be pivoted upward in an opening direction, and latch devices by means of which the cover can be locked into the frame so that it will not open. These hinges and/or latch devices are constructed as spring-action cast rods and are integrally connected to the cover.

Abstract: A screed assembly includes a screed plate, a console assembly, and a first and second handles. The various components of the screed assembly are attached to one another with quick connect mechanisms so that they can be disassembled for cleaning and transport and reassembled at a new site. A tilt mechanism operated by a horizontal beam of light can also be utilized and is also attached by a quick connect mechanism.

Abstract: A floating moored oilfield production structure for deepwater application. An apparatus and a method for the construction and installation of floating oilfield production structures, wherein the deck structure is supported by multiple pairs of inclined buoyant legs which in turn support a subsurface damping plate structure for reducing the motions of the platform. The structure initially is initially constructed in a first configuration in relatively shallow water and then towed to a deepwater location where it is reconfigured to its operational configuration. The major structural components are joined by selectably operable pin connections.

Abstract: A guide tube for a flexible pipe for transporting hydrocarbons comprising an internal tubular element of a substantially rectilinear section extending along an axis (A) and extended by a free section having a curvature along its length and a wall which is internal with respect to the curvature against which the flexible pipe is accommodated when frictionally carried through guides. The rectilinear section comprises eccentric guides for directing the flexible pipe away from the axis (A) and in a direction opposite to the curvature of the free section such that the pipe is deviated from the internal wall.

Abstract: Disulfonate salts of 2,4-pentanedione and methods for making such salts are described. The disulfonate salts are useful as cement dispersants. Cement compositions including such salts, methods for making cement compositions including such salts, and methods for performing cementing operations using such cement compositions are also described.

Abstract: A cutting tool apparatus having a shank and a tool support extension disposed longitudinally adjacent the shank and extending in a direction distal the shank, wherein the tool support extension includes an incurvate taper profile.

Abstract: In a tool holder, when oil supplied via an oil supply passage and an oil introducing passage reaches an atomizing space, the oil is atomized by an air flow of carrier gas consisting of compressed air, and then water supplied from a water supply passage and a water introducing passage is formed into a water drop in the atomizing space by an air flow of oil containing compressed air to generate the water drop with oil film in which the oil film is formed on a surface of the water drop. Since the water drop with oil film is supplied to a work piece through a top nozzle and an in-tool passage, the water drop with oil film is generated at an extremely close location to a tool, and therefore, responsiveness when supplying the water drop with oil film to the work piece can be enhanced.

Abstract: A power tool having a body, a tool bit holder protruding from the tool body for holding and rotating a tool bit about an axis of rotation, and an operator for operating the bit holder. The operator includes an annular member rotationally engageable with the bit holder for manual turning to tighten and/or release the bit holder, and a mount mounting the annular member to the tool body for movement between a non-operative position, rotationally disengaged from the bit holder, and an operative position, rotationally engaged with the bit holder.

Abstract: A non-rotary cutting tool which is to be moved relative to a workpiece in a predetermined direction for cutting the workpiece, with its rake face being held substantially perpendicular to the predetermined direction. The cutting tool includes (a) a generally cylindrical shank portion, and (b) a generally semi-cylindrical body portion which has an outer circumferential surface constituted by the rake face and a semi-cylindrical surface. The semi-cylindrical body portion has a cutting edge which is defined by an edge of the rake face and which is covered with a diamond coating. Also disclosed is a process of machining a scroll member of a scroll compressor by using this non-rotary cutting tool.

Abstract: A bar and lock arrangement includes a bar having spaced ends, a pair of swing arms respectively extending from each end of the bar for pivotally mounting the bar on a frame, a latch at each end of the bar for releasably latching each end of the bar to the frame on which said swing arms are mounted, a cable extending between the latches for releasing the latches so that said bar can pivot around the swing arms with respect to the frame, and a handle mounted on the bar and coupled to the cable for simultaneously releasing the latches. An abutment preferably is disposed on the bar and positioned adjacent to the handle such that initial force on the handle moves the handle on said bar, releases the latches and brings the handle into engagement with the abutment, further force on the handle operating through the abutment and the bar to pivot the bar around the swing arms.

Abstract: A fastener for securing particle or bulge producing materials, a method of manufacturing the fastener, and a method of using the fastener are provided. The fastener has a thread on a shank, and a knurled portion disposed between the thread and a head. The fastener also may have at least one flute in the knurled portion, and may have at least one rib on the lower surface of the head. In use, the method is accomplished by inserting the fastener, by rotation, into a particle or bulge producing material, and producing particles or a bulge. Then, the method provides for transporting at least some of the particles from the particle producing material via the at least one flute, and securing the particle producing material to a base material. In a bulge producing material, the method provides for displacing the bulge into the material.

Abstract: A fastener includes a head, a threaded member, and a resilient shank portion interconnecting the head portion and the threaded portion. The shank portion includes a first end adjacent the head and a second end adjacent the threaded member. The shank includes a tubular section having an inner wall and an outer wall between the first end and the second end. The tubular section has a curved axial profile. The tubular section is axially elastically deformed as the fastener is torqued down.

Abstract: Interference surfaces are constructed on inner transition surfaces between wings of a fastener having a spiral recess. A portion of the transition surface is tapered to provide the interference. A standard driver for a spiral recess will engage the interference surface to create a “stick fit” engagement. The punch is formed using a wire EDM operation to construct tapered surfaces within the die cavity of a hob. The hob is machined down to obtain the desired depth, which is measured up from a gage spot indicative of the sticking point.

Abstract: The present invention is a wafer transfer system that transports individual wafers between chambers within an isolated environment. In one embodiment, a wafer is transported by a wafer shuttle that travel within a transport enclosure. The interior of the transport enclosure is isolated from the atmospheric conditions of the surrounding wafer fabrication facility. Thus, an individual wafer may be transported throughout the wafer fabrication facility without having to maintain a clean room environment for the entire facility. The wafer shuttle may be propelled by various technologies, such as, but not limited to, magnetic levitation or air bearings. The wafer shuttle may also transport more than one wafer simultaneously. The interior of the transport enclosure may also be under vacuum, gas-filled, or subject to filtered air.

Abstract: A lifting apparatus and method according to which a load is mounted to a structure. The structure is rotated about a pivot axis so that the load is positioned over an object while remaining mounted to the structure, and the load is translated towards the pivot axis during the rotation so that the radial distance between the load and the pivot axis is decreased during the rotation.

Abstract: The lift apparatus includes a forward and rearward moving rail member mounted to a roof panel within a vehicle body to extend rearward from a position of a driver's seat by a predetermined distance. A leftward and rightward moving rail member is mounted to the roof panel to extend sideward from a rear end of the forward and rearward moving rail member by a preselected distance. A lifter is movable along the forward and rearward moving rail member and the leftward and rightward moving rail member and capable of lifting and holding the seat and lowering and releasing the seat. A rotating device is installed at an intersection of the forward and rearward moving rail member and the leftward and rightward moving rail member, for rotating the lifter by a predetermined angle.

Abstract: An active clearance control system is provided that uses compressor extraction air to manipulate blade tip clearance in an industrial gas turbine and compressor. A stream of air is taken from a cooling and sealing air circuit and redirected to be used for active clearance control. The spent clearance control air is re-introduced into the hot gas path of the gas turbine for cooling and sealing purposes.

Abstract: A turbo chiller that can accurately determine the existence of surging occurring in a centrifugal compressor is provided. In a centrifugal compressor of a turbo chiller, which includes an impeller for compressing refrigerant, a resistance temperature sensor for detecting the refrigerant temperature is provided at the upstream side of the impeller. Accordingly, a temperature rise caused by surging can be detected and the existence of surging can be accurately determined.

Abstract: A gas compressor based on the use of a driven rotor having a compression ramp traveling at a local supersonic inlet velocity (based on the combination of inlet gas velocity and tangential speed of the ramp) which compresses inlet gas against a stationary sidewall. In using this method to compress inlet gas, the supersonic compressor efficiently achieves high compression ratios while utilizing a compact, stabilized gasdynamic flow path. Operated at supersonic speeds, the inlet stabilizes an oblique/normal shock system in the gasdyanamic flow path formed between the rim of the rotor, the strakes, and a stationary external housing. Part load efficiency is enhanced by the use of a pre-swirl compressor, and using a bypass stream to bleed a portion of the intermediate pressure gas after passing through the pre-swirl compressor back to the inlet of the pre-swirl compressor. Inlet guide vanes to the compression ramp enhance overall efficiency.

Abstract: An annular air baffle for use in a cavity of an annular rotatable gas turbine engine component includes an annular split baffle ring having a plurality of circumferentially spaced apart and radially inwardly extending intermediate dams circumferentially disposed between first and second end dams. The intermediate dams and the first and second end dams extend radially inwardly from a continuous annular section. Voids are disposed between the intermediate dams and between the first and second end dams and adjacent ones of the intermediate dams. The voids are located radially inwardly of the continuous annular section and are formed by removing material from a split rolled ring rolled from barstock or a rod.

Abstract: A vane assembly for a gas turbine engine is disclosed having lower thermally induced stresses resulting in improved component durability. The stresses in the vane assembly airfoils are lowered by increasing the flexibility of the vane platform and reducing its resistance to thermal deflection. This is accomplished by placing an opening along the innermost vane assembly rail that reduces the effective stiffness of the platform, thereby lowering the operating stresses in the airfoils of the vane assembly. A removable seal is then placed in the opening in order to prevent undesired leakages, while maintaining the benefit of the increased platform flexibility.

Abstract: A centrifugal pump (1) is proposed, in particular for household appliances, such as washing machines or dishwashers, which comprises a pump housing (2) having an axial inlet (11), an outlet (12) and a heating element, wherein the pump housing (2) incorporates a rotatably mounted impeller (4) and a flow channel (15) enveloping the impeller (4) and heating element. The centrifugal pump (1) according to the invention is intended to have improved efficiency. This is achieved by having the flow cross-section of the flow channel (15) increase along the periphery toward the outlet (12).

Abstract: Wind turbine blade (10) including adjustable lift-regulating means (12, 13, 15, 17, 19, 21) arranged on or at the surface of the wind turbine blade (10), said lift-regulating means being provided with activating means by means of which they can be adjusted and thus alter the aerodynamic properties of the blade (10). The lift-regulating means (12, 13, 15, 17, 19, 21) and the activating means are adapted and arranged such that by activation of the activating means, the lift can be reduced in a zone extending in the longitudinal direction of the blade (10) from a first position adjacent the blade tip (14) to a second position between the position and the blade root (16) and this second position is variable in the longitudinal direction of the blade (10) by adjusting activate means. The lift-regulating means are formed of at least one flexible flap (12, 13, 15, 17, 19, 21).

Abstract: A floating power generation assembly comprises at least three floating units (900) floating on a body of water, and at least three anchors (916) secured to a solid surface beneath the body of water, each of the floating units (900) being provided with a power generator, the floating units (900) being arranged substantially at the vertices of at least one equilateral triangle. Ship borne apparatus for deploying the floating units of such a power generation assembly and a novel multiple wind turbine assembly are also described.

Abstract: A turbine airfoil includes pressure and suction sidewalls spaced apart to define flow channels extending in span and separated by ribs. Side channels are disposed along one sidewall and spaced from the opposite sidewall by the ribs, and a mid channel bridges the sidewalls. The side and mid channels are arranged in a zigzag serpentine cooling circuit alternating therebetween for transferring heat from the sidewall into the mid channel.

Abstract: A turbine blade or vane (1) has a shell (2), including a first side wall (8) and a second side wall (9), which are connected together at a leading edge (10) and at a trailing edge (11), which extend longitudinally from a root (7) to a tip (6) and which are connected together between leading edge (10) and trailing edge (11) by a plurality of inner ribs (13). In the inner region (12) of the turbine blade/vane (1), the ribs (13) form at least one cooling gas path (15), which guides a cooling gas flow from the root (7) to the tip (6) and, in the process, is deflected a plurality of times in serpentine shape from the outside to the inside and from the inside to the outside.

Abstract: A boot provides for removable attachment to a tail rotor assembly to flexibly protect the interior of the tail rotor blade assemblies. The boot includes a first fastener strip mounted adjacent a first boot edge and a second fastener strip mounted adjacent a second boot edge. The first and second fastener strips are “hook and loop” material to removably attach the edges which permits relatively uncomplicated installation and removal of the boot.

Abstract: A turbomachine blade is repaired by making a leading edge cutback between two points (A) and (E) where point (A) lies within a range of relative blade height (h/H) of 0?(h/H)point A<0.85, and point (E) lies within a range of 0.95<(h/H)point E?1.0, with (h) being a blade height coordinate which originates at an end of the blade closer to starting point (A), and (H) being the blade height. A cutback trace is defined by (s/SAE) and (c/Cm), with (c) being a local cutback length in meridional flow direction, (Cm) being a meridional chord length, (s) being a local cutback length in radial direction, and (SAE) being a radial cutback length, where (c) gradually increases from point (A) to its maximum at 0.60<s/SAE<0.95, with (c/Cm) there being ?0.25, and then decreasing to ?0.05.

Abstract: A limiter device is provided in a variable displacement compressor capable of varying a discharge displacement per revolution and compressing a fluid in a cycle. The limiter device includes an operating characteristic acquiring means for acquiring a predetermined characteristic during a compression operation of the compressor, and a varying means for varying the discharge displacement of the compressor to a minimum side when the predetermined characteristic obtained by the operating characteristic acquiring means exceeds a predetermined value. Thus, the limiter device can prevent the compressor from being brought into trouble such as locking and can protect a driving belt and other auxiliary equipment on a side of an engine, while it is unnecessary to provide a pulley with a limiter function.

Abstract: A variable capacity rotary compressor including a housing, the housing including two compression chambers, the two compression chambers having different capacities; a rotating shaft rotatably provided in the two compression chambers; two eccentric units respectively provided in the compression chambers in such a way as to be fitted over the rotating shaft, the two eccentric units being operated so that one of the two eccentric units is positioned eccentrically from the rotating shaft to perform a compression operation while the other eccentric unit is positioned concentrically with the rotating shaft to perform an idle operation, according to a rotating direction of the rotating shaft; roller pistons fitted over each of the two eccentric units; vanes installed in each of the two compression chambers so as to reciprocate in a radial direction while being in contact with an outer surface of the roller piston; and a path control unit to control a refrigerant suction path so that a refrigeran is provided to an in