Abstract: A screw compressor includes a casing, a screw rotor, a discharge passage, and at least one muffler space. The casing includes a cylindrically-shaped cylinder, a main body surrounding a vicinity of the cylinder, and a high-pressure fluid passage provided between the main body and the cylinder. The screw rotor includes a plurality of helical grooves. The screw rotor is inserted into the cylinder to define fluid chambers. A fluid is sucked into the fluid chambers to compress the fluid. The discharge passage is disposed in the casing. The discharge passage guides the fluid that has been discharged from the fluid chambers to the high-pressure fluid passage. The at least one muffler space is disposed in the casing. The at least one muffler space communicates with the discharge passage so as to reduce a pressure fluctuation of the fluid flowing from the discharge passage to the high-pressure fluid passage.

Abstract: A pneumatic motor for pneumatic tools includes a cylinder provided therein with a vane wheel. A rotating shaft inserted in the vane wheel is provided with a withstanding member and a tightening member, which can push the withstanding member to move toward the vane wheel and tighten the vane wheel with the rotating shaft for avoiding gap between the vane wheel and the rotating shaft. Thus, when outside driving air pushes the vane wheel to rotate, the vane wheel can synchronously drive the rotating shaft to rotate immediately and truly. By so designing, this invention can solve the problems of the conventional pneumatic motor that is likely to cause starting delay, untrue in power transmission and easy to wear.

Abstract: A co-rotating scroll compressor is provided in which pressure differences between inner and outer portions of a suction chamber are maintained, back pressures are applied to rear surfaces of end plates of a drive scroll and a driven scroll in directions in which the two scrolls are moved toward each other to prevent compression leakage of a fluid, and a lubricant oil is easily supplied to the two scrolls using the back pressures. The co-rotating scroll compressor may include pressure seals between the rear surfaces of the end plates of the drive scroll and the driven scroll and an inner wall of the suction chamber such that the two scrolls are pressed in directions to be moved toward each other by the back pressures, and the oil is supplied to rotary supports and close contact portions of the two scrolls using the back pressures.

Abstract: Disclosed is a connection structure of an exhaust bearing seat for compressors and screw compressors, designed to solve the problem of large radial vibration of the existing exhaust-end bearing seat. The connection structure includes an exhaust bearing seat, an oil separation bucket, and an oil separation screen assembly all arranged at an exhaust end of a body of the compressor, wherein a tail end of the exhaust bearing seat is connected with the oil separation screen assembly, and an outer periphery of the oil separation screen assembly is provided with a vibration-reducing element, which is connected to an inner wall of the oil separation bucket. The vibration of the exhaust bearing seat is transmitted to the vibration-reducing element through the oil separation screen assembly, and then to the oil separation bucket after being absorbed and suppressed by the vibration-reducing element.

Abstract: A progressing cavity gas pump with a stator which has a stator interior with an elastomeric inner surface as well as a gas outlet and a gas inlet, between which a pump delivery direction is defined, and with a rotor which engages with the stator interior, wherein below the stator, a lubricant reservoir is arranged which is connected via lubricant conduit devices to the stator interior. A progressing cavity gas pumping method using a progressing cavity gas pump, gas coming from a gas inlet is delivered with a rotationally driven rotor within a stator and through a stator interior having an elastomeric inner surface to a gas outlet and is compressed, and wherein from a lubricant reservoir below the stator, a lubricant supply to the stator interior takes place via lubricant conduit devices, and lubricant from the stator interior is recycled via the lubricant conduit devices into the lubricant reservoir.

Abstract: A compressor has auxiliary and main oil reservoir chambers that retain lubricant oil that is separated from refrigerant in an oil separation chamber. A part of the auxiliary oil reservoir chamber is defined by a peripheral wall of the oil separation chamber. An introducing passage for introducing lubricant oil in the oil separation chamber to the auxiliary oil reservoir chamber is formed in the peripheral wall. The inlet of the introducing passage opens to the oil separation chamber on the inner surface of the peripheral wall. The outlet of the introducing passage opens to the auxiliary oil reservoir chamber. The main oil reservoir chamber is located below the auxiliary oil reservoir chamber in the direction of gravity. A drain port for draining lubricant oil in the auxiliary oil reservoir chamber to the main oil reservoir chamber is formed in a bottom wall of the auxiliary oil reservoir chamber.

Abstract: An oil recovery member, a motor mechanism, and a compressor using the same are provided. The oil recovery member is provided to prevent oil rising along a rotational shaft from being discharged with refrigerant, and relative sizes, such as installation positions between the oil recovery member and components adjacent thereto, are restricted. As the oil flow is guided through a passage defined between the oil recovery member and the adjacent components, the oil may be efficiently recovered, so that, an oil circulation rate of a freezing cycle may be reduced and compression efficiency improved.

Abstract: An aspect of the present disclosure involves a rotary compressor that is primarily optimized for use without the need for liquid lubricants, such as in the flow path of the fluid being compressed, and is efficient and quiet to use. The compressors described herein are efficient, run quietly, use less power, and last longer than those previously known in the art. The compressors are useful for medical applications and other clean gas applications, for instance, where lubricants could contaminate the fluid being compressed and/or increased noise and/or vibration may be problematic.

Abstract: Rotary components are described that include a housing comprising a rotor having a rotor working face and a gate having a gate working face and a pocket; at least one vane, wherein the vane is coupled to the rotor; at least one wiper coupled to the vane; a plurality of endplates coupled to the housing, wherein at least one of the endplates is a float plate; an intake chamber; and an outlet chamber. In addition, methods of aspirating a working medium by utilizing the rotary component having at least one float plate includes pulling the working medium into the intake chamber, depositing the working medium into a working chamber that is located between the intake chamber and the outlet chamber; maintaining the working medium in a stationary position until the vane sweeps around toward the outlet chamber; accumulating the working medium into the outlet channel of the outlet chamber; and centrifugally ejecting the working medium into the outlet chamber and out of the system.

Abstract: A compressor may include a compressor housing, an oil sump, an intake chamber, a compression mechanism, a drive shaft, and a first oil passage. The oil sump may be in communication with the compression mechanism. The intake chamber may be defined within the housing. The drive shaft may include first and second ends with an oil inlet passage located therebetween. The first end may be disposed within the intake chamber and may be drivingly engaged with the compression mechanism. The second end may extend outside of the housing for driven engagement external to the housing. The oil inlet passage may be located within the intake chamber. The first oil passage may be disposed within the housing and in communication with the oil sump and the oil inlet passage.

Abstract: A water injection type screw compressor wherein gas sucked from an intake flow is supplied to a rotor chamber, compressed and discharged into a discharge channel as compressed fluid together with water supplied to the rotor chamber, comprises a water separator disposed in the discharge channel to separate water and gas from compressed fluid, a water channel connecting the water separator to a compressor main body for supplying the rotor chamber with the water separated in the water separator, and an oil circulation channel including an oil pump, an oil filter, and a housing for storing oil for supplying the oil to where lubrication is needed. Further, a part of the water channel is arranged passing through an oil trap formed at the bottom inside the housing for storing oil. Thus, oil temperature increases can be minimized in simplified structure having no oil cooling means such as an oil cooler.

Abstract: Positive-displacement auxiliary pumping systems for use in pump apparatus of different configurations are disclosed. The positive-displacement auxiliary pumping systems are included in positive-displacement rotary pumps having a casing defining a pumping cavity, an inlet port connected to the pumping cavity, a discharge port connected to the pumping cavity, and a positive-displacement auxiliary pumping port connected to the pumping cavity. Pumping elements move within the pumping cavity of the casing and define a collapsing pocket that maintains fluid communication with the positive-displacement auxiliary pumping port after the collapsing pocket is no longer in fluid communication with the discharge port.

Abstract: A compressor incorporated with an oil separator having a separation chamber, which is placed adjacent to a discharge chamber, has a space formed in the entire inside of the separation chamber, separates oil-containing gas, being introduced, into gas and oil by centrifugal separation, allows the separated oil to drop downward, and upwardly extracts the separated gas, and also having a lower hole for introducing the separated oil into an oil storing chamber. The oil separator is formed as a joining structure of two compressor forming members, and a portion of the oil storing chamber, other than a portion where the lower hole is opened, is communicated with the separation chamber via a gas release passageway at least a part of which is formed between the two compressor forming members.

Abstract: An oil separator includes a separation part and an oil storage part. The separation part includes a separation cylinder, an inner cylinder disposed in the separation cylinder and an inlet pipe connecting to the separation cylinder tangential to an inner surface of the separation cylinder. The separation part defines an inlet opening to introduce CO2 refrigerant containing oil in the separation cylinder. The separation cylinder separates the oil from the CO2 refrigerant by means of centrifugal force. A ratio of a flow rate (kg/h) of the CO2 refrigerant flowing in the separation cylinder to an area (mm2) of the inlet opening is at least 4. Alternative to or in addition to the above, a ratio of a distance (mm) from an end of the inner cylinder to a bottom wall of the separation cylinder to an inner diameter (mm) of the separation cylinder is at least 2.5.

Abstract: A two-stage medium-pressure screw air compressor comprises a primary screw compressor (21) and a secondary screw compressor (22) communicating with the gas-liquid separator (6) via the first gas-liquid inlet (61). A first oil outlet (63) is connected to a mid section of a gas-liquid separator (6). The oil is injected into the lubricating components of the compressor is the first oil outlet (63), a first filter (64). A secondary oil-water separator (9) is connected to the first oil outlet (63) of the gas-liquid separator (6), the second oil-water separator (6) has an upper separating tank (91) and a lower separating tank. The water and the impurities contained in the lubricating oil can be eliminated at a largest extent, so as to create essential condition thr ensuring the screw compressor to operate continuously, stably and safely and provide high operational reliability, safety and long service life.

Abstract: An oil-cooled type screw compressor includes shafts mounted on rotors in a casing and extended to two sides of the rotors. Thrust plates rotate with the shafts. The thrust plates are sealed while spacing them from the rotors and define first and second spaces. Thrust bearings are arranged in the first and second spaces. An oil feed passage communicates with the one of the first and second spaces that is located on the side to apply a force against the thrust force to the thrust plates when boosted. An oil discharge passage communicates with the one of the first and second spaces that is located on the side to apply a force against the anti-thrust force to the thrust plates when boosted, to establish the communication between the space inside and an oil discharge target. An oil distribution passage distributes oil between the first space and the second space.

Abstract: There is disclosed a scroll compressor capable of improving the oil separating device of a refrigerant gas discharged from a scroll compression element to effectively suppress the amount of oil to be discharged through a discharge tube. The scroll compressor has, in a sealed container, a scroll compression element, a motor element which drives the scroll compression element, and a support frame having a bearing portion which keeps a shaft of the motor element, and provided with a communication path. The scroll compressor further includes a shield plate which extends from the support frame to the motor element side to surround the periphery of the bearing portion, and a guide member provided at an outlet of the communication path to guide the discharged gas in the direction of the shield plate.

Abstract: A lubricant-tight vane rotary vacuum pump, includes a pump stage (17) having a pump stage housing (10) with a gas inlet, compression chamber (11), and a gas outlet (51), a channel (50) connecting the compression chamber (11) with the gas outlet (51), and a groove (54) at least partially surrounding a mouth of the connecting channel (50) that opens into the gas outlet (51), so that lubricant, which is tossed out of the compression chamber, is collected in the groove (54) and re-entry of the lubricant back into the compression chamber (11) is prevented.

Abstract: A compressor comprises an oil separator for separating oil from a refrigerant compressed by a compression mechanism unit, and a high-pressure oil storage chamber for storing the oil separated by the oil separator. At least a portion of the oil separator is provided outside a housing. The high-pressure oil storage chamber has an outer wall that is thicker than the outer wall of the housing accommodating the compression mechanism unit, and an end wall of the housing is formed by this thicker outer wall.

Abstract: The present invention relates to an oil recovery member, and a motor mechanism and a compressor using the same. The oil recovery member is provided to prevent oil rising along a rotation shaft from being discharged with refrigerant, and relative sizes such as installation positions between the oil recovery member and components adjacent thereto are restricted. Therefore, since the oil flow is guided through a passage defined between the oil recovery member and the adjacent components, the oil can be efficiently recovered, so that an oil circulation rate of a freezing cycle can be reduced and compression efficiency can be improved.

Abstract: There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engaged with an eccentric portion formed in a rotary shaft of an electric element, and eccentrically rotated in the cylinder, a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side, a spring member for always pressing the vane to the roller side, a housing portion of the spring member, formed in the cylinder, and opened to the vane side and a hermetically sealed container side, a plug positioned in the hermetically sealed container side of the spring member, and inserted into the housing portion to fit into a gap, and an O ring attached around the plug to seal a part between the plug and the housing portion.

Abstract: Disclosed is a pressurized internal oil management system, comprising an oil dam, at least one oil separator, at least one oil collection manifold, at least one oil pump, and one or more paths for returning the separated oil; said system integrated within the casing of a fluid displacement device to supply adequate lubrication regardless of orientations under zero to full gravity, and methods and applications related thereto. Fluid displacement devices useful herein include oil lubricated rotary or reciprocating machinery, such as compressors, expanders, pumps and engines, in the casing of which exists one or more drive mechanisms that can be utilized to operate the oil management system, in most cases without even increasing the size of the casing.

Abstract: A scroll-type refrigerant compressor with a sealed enclosure defined by a shell and containing a suction volume and a compression volume at opposite ends of the enclosure. The shell has a gas inlet, an electric motor on the suction side having a stator and defining with the shell an annular volume. The stator is surrounded by a jacket defining an annular volume with the shell and a chamber which contains the motor winding and is directed towards the compression volume, an end of the intermediate jacket directed away from the compression volume being located at an end of the stator directed away from the compression volume. Structure is provided for conveying some of the gas arriving at the gas inlet into the chamber containing the motor winding, and gas conveyed by the structure is admitted into the chamber containing the winding through the gas intake orifice.

Abstract: A portable, rotary vane vacuum pump with a rotor eccentrically mounted within the bore of a housing to substantially abut the bore at a side location. The abutting, side location is between the inlet and outlet passages of the bore in the direction of rotor rotation. A pocket is then created just above the contact area between the rotor and bore which collects and maintains a pool of lubricating oil. The pool enhances the seal at the contact area below it enabling the pump to draw a deep vacuum with just a single stage. The portable pump also includes a removable, oil reservoir cartridge mounted to the main body of the pump. Other features include a visual indicator in the cartridge to monitor the condition of the circulating oil, a step up gearing arrangement for the cooling fan, and a step down gearing arrangement for the vane pump.

Abstract: A gas vane pump wherein a lubricant is intermittently introduced into a housing during rotation of a rotor, through a supply passage formed through the housing and the rotor, and the relative position between the rotor having a diametric hole and the housing having a communication groove is determined such that when the rotor is at an angular position in the middle of a predetermined angular range relative to the housing and the hole is in communication with the groove, a point of contact between a vane movably held by the rotor and the inner circumferential surface of the housing is located at the lowest position of the inner circumferential surface. When the rotor is stopped within the predetermined angular range, the vane divides the remaining lubricant into two portions, which are discharged at different times, making it possible to reduce the load on the vane upon restarting the pump.

Abstract: An object is to provide a rotary compressor capable of reducing an oil discharge amount to the outside, and there is provided a vertical rotary compressor constituted by housing an electromotive element and a rotary compression mechanism section driven by the electromotive element in an airtight container, wherein an oil separation mechanism for centrifugally separating oil in a refrigerant which has been compressed by the rotary compression mechanism section and discharged is disposed in a space between the airtight container and the rotary compression mechanism section in the airtight container.

Abstract: According to the present invention, an oil supply passage is formed in a suction space of a fixed scroll part, and an oil collision part is provided in the suction space. The oil collision part is provided in the suction space, an amount of oil to be supplied is controlled, refrigerant and lubricant oil are sufficiently mixed with each other. Tangents of ends of the oil collision part are made acute angle to smoothen the flow of the refrigerant.

Abstract: A water-injected compressor, which injects the water inside the separator 3 into the compressor and discharges the water along with compressed air into the separator and then gains condensed and separated water, has the compressor stopping and then, if staying at a stop for a predetermined duration of time without activating, becoming activated and operating for a set duration of time.

Abstract: An oil supply hole connecting an oil reservoir to a suction port formed in a lower supporting member of a two-stage rotary compressor is disclosed. The suction port is provided in the lower supporting member attached to the lower side of a high stage side rotary compressing element, and a necessary amount of oil is supplied into return refrigerant gas sucked into the high stage side rotary compressing element through this oil supply hole. Thus an outer circumferential surface of a roller, which eccentrically rotates in a cylinder, is lubricated to protect it from wear.

Abstract: A rotary screw vacuum pump system includes a vacuum bypass system, which communicates with a first closed cell formed by the rotor system. An air bypass valve within an air communication conduit is controlled by a solenoid valve that operates in response to a pressure switch. The pressure switch is in communication with a vacuum pump suction conduit that draws suction for a suction system attached thereto. The solenoid valve is activated by the pressure switch at a vacuum level slightly below the point at which the undesirable cavitation noise generated at terminal vacuum condition begins.

Abstract: A horizontal-type electric motor driven compressor comprises a casing, a suction chamber formed in the casing, an electric motor arranged on a suction chamber side in the casing, a compressor section driven by the motor in the casing about a horizontal axis of rotation extending in a longitudinal direction of the casing, a suction opening provided in the compressor section, and a refrigerant passage having an inlet communicating with the suction opening and communicating the suction chamber to the suction opening. The refrigerant passage is the sole refrigerant passage between the suction chamber and the suction opening. The inlet of the refrigerant passage is provided in a lowermost portion at a bottom of the casing.

Abstract: According to a scroll compressor of the present invention, lubricant is supplied to a compression chamber in the proportions of 2% by weight or more and less than 20% by weight of the lubricant to the sucked refrigerant amount. With this, it is possible to provide an efficient scroll compressor even when carbon dioxide is used as the refrigerant.

Abstract: A rotary compressor having a housing with a motor and an internal accumulator located on the low pressure side and an oil sump located on the high pressure side. A sealing means positioned within the housing defines a first low pressure chamber and a second high pressure chamber. The sealing means substantially maintains the pressure differential between the chambers by segregating high pressure fluid in the high pressure chamber from low pressure fluid in the low pressure chamber. The fluid entering the housing is separated into a gas portion and a liquid portion, the liquid portion being directed downward toward the motor to provide cooling for the motor while the gas portion is directed to a compressor portion through a channeling means internal to the compressor housing. The liquid portion collects above the sealing means.

Abstract: A vacuum exhaust apparatus includes an oil-sealed rotary pump with a gas inlet for taking a gas into the pump. The gas inlet has a gas inlet flange to join with a flange of a gas inlet pipe for guiding the gas to the pump. An oil supply section connects with the gas inlet pipe and supplies an oil into the gas inlet pipe.

Abstract: An industrial robot including a manipulator having a control system. The manipulator includes a common gear housing having first and second inner compartments connected with a passage channel. First and second gears are arranged in the first and second inner compartments and are adapted to move the manipulator. A cooling and lubricant medium is disposed in the common gear housing and circulates between the first and second inner compartments through the passage channel.

Abstract: A scroll-type compressor having a stationary scroll and a movable scroll is provided. A compression chamber is defined between a stationary scroll and a movable scroll. A refrigerant introducing passage formed in the movable scroll for introducing a refrigerant from the compression chamber to a driving mechanism. The compressed refrigerant including a lubricant introduced through the passage is affective to lubricate the driving mechanism. The compressor may also include a sump to collect the lubricant leaving the driving mechanism. Collected lubricant is reintroduced into the compression region via a suction region of the compressor.

Abstract: An improved scroll compressor has condition responsive lubricant volume flow. The lubricant is preferably delivered to a tap positioned adjacent the suction chamber such that lubricant is delivered into the scroll compressor in a quantity which is desirable for normal operation of the scroll compressor. A valve is associated with the tap, and restricts the flow of lubricant through the tap to a first more restrictive non-actuated position. If operational conditions within the scroll compressor indicate that a greater lubricant flow would be desirable, the valve moves to an actuated position at which it is less restrictive to the flow of lubricant.

Abstract: A scroll compressor having a cylindric hermetically closed shell, a suction chamber within the shell, a scroll mechanism in the shell, lubrication mist generating elements, a suction gas inlet opening radially into the suction chamber and a deflector plate in overlying relationship with the suction gas inlet and cooperating with the shell to delimit a duct having at least an upper opening feeding suction gas to the scroll mechanism. To uniformly laden the suction chamber with sufficient oil, the upper opening is shaped to deflect suction gas into a region within the suction chamber where an oil mist is generated by the mist generating elements during operation.

Abstract: A scroll-type compressor having a stationary scroll and a movable scroll is provided. A compression chamber is defined between a stationary scroll and a movable scroll. A refrigerant introducing passage formed in the movable scroll for introducing a refrigerant from the compression chamber to a driving mechanism. The compressed refrigerant including a lubricant introduced through the passage is affective to lubricate the driving mechanism. The compressor may also include a sump to collect the lubricant leaving the driving mechanism. Collected lubricant is reintroduced into the compression region via a suction region of the compressor.

Abstract: A rotary vane combustion engine is provided that has a plurality of vane cells. This rotary vane combustion engine includes a rotor having a plurality of vanes; a stator enclosing the rotor to form a plurality of vane cells between the plurality of vanes; one or more intake ports for providing intake charge to the vane cells; one or more exhaust ports for removing exhaust gas from one of the vane cells; and a variable bandwidth fuel-air source connected to at least one of the intake ports for providing a discrete band of mixed fuel and air having a desired axial width to each of the plurality of vane cells. By providing a discrete band of fuel and air to each of the vane cells, this rotary vane combustion engine will allow the machine or engine to run at lower power without requiring it to run a vacuum to lower the density of mixed fuel and air. As a result, vacuum pumping losses can be substantially eliminated and the machine or engine can operate more efficiently.

Abstract: A feed pipe 26 for a sealing water is connected to a housing of the pump to communicate with an enclosed chamber which is defined between a position in which a helical seal line of screw rotors 17 isolates the enclosed chamber from a suction port 15 of the pump and another position in which the enclosed chamber begins to open to a discharge port 24. Alternatively, a feed pipe for the sealing water is connected to the suction port 15 of the vacuum pump, and the feed pipe 26 is provided with a valve V which opens when the suction pressure of the sealing water becomes lower than −380 mmHg.

Abstract: A scroll compressor having a cylindric hermetically closed shell, a suction chamber within the shell, a scroll mechanism in the shell, lubrication mist generating elements, a suction gas inlet opening radially into the suction chamber and a deflector plate in overlying relationship with the suction gas inlet and cooperating with the shell to delimit a duct having at least an upper opening feeding suction gas to the scroll mechanism. To uniformly laden the suction chamber with sufficient oil, the upper opening is shaped to deflect suction gas into a region within the suction chamber where an oil mist is generated by the mist generating elements during operation.

Abstract: A highly reliable scroll compressor adapted to make the amount of a refrigerant taken in through a first suction inlet of a scroll compression element as equal as possible to that taken in through a second suction inlet of the scroll compression element so as to improve the intake efficiency, thereby suppressing pulsation and noise. If the sectional area of the inlet of a refrigerant passage through which a refrigerant taken in flows from an end of a swivel lap via the outer periphery thereof to the second suction inlet is denoted as A1, the sectional area of the inlet of the first suction inlet is denoted as A2, and the sectional area of the inlet of a communication groove is denoted as A3 when the gap between a stationary lap and the swivel lap of the scroll compression element reaches its maximum, then A1, A2, and A3 stay within a range defined by 1.5≦A2/(A1+A3)≦2.5.

Abstract: A horizontal open drive scroll machine has a lubrication removal system located with the suction inlet of the scroll machine's outer housing. The lubrication removal system includes a funnel which directs the incoming working fluid to a position radially inward from the suction inlet defined by the scrolls. A fine mesh screen is located within the suction inlet of the housing to further aid in the removal of the lubricant from the working fluid being returned to the suction pressure chamber of the scroll machine.

Abstract: In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers is formed when the positional relationship between the displacer and cylinder is for a gyration, the wear is reduced between the cylinder and displacer. Sliding portions between the displacer 5 and a cylinder 4 are fed with a lubricating oil 12 by forming an oil-feeding groove 5c in the surface of the displacer 5 so as to extend from the central portion of the displacer 5 to the vicinity of a suction port 7a, and feeding the lubricating oil 12 from the central portion of the displacer 5, so that the wear can be reduced.

Abstract: A hermetic rotary compressor comprising a housing, a cylinder block and a bearing assembly in the housing and defining a cylindrical cavity therein. A roller piston, drivingly coupled to a motor, is disposed in the cylindrical cavity. The cylinder block includes a reciprocating vane within a vane slot defined therein. The vane slot extends axially through said cylinder block, radially from an outside perimeter surface of the cylinder block to the cylindrical cavity. At least a portion of the vane slot is defined by a pair of substantially parallel sidewalls with the vane disposed in the vane slot and urged against the roller piston. The vane is guided by the substantially parallel sidewalls and a clearance exists between the vane and the substantially parallel sidewalls.

Abstract: A scroll-type compressor includes a housing having a suction chamber with a suction port provided on a wall of the housing that opens into the suction chamber. The compressor also includes first and second scroll members at an angular and radial offset for forming fluid pockets, each scroll member having a spiral element. A groove is formed on an inner surface of the housing and an outer peripheral surface of one of the spiral elements. The groove extends in a circumferential direction of the housing at a position to include the suction port and forms an oil path for introducing oil into the interior of the housing when the compressor is assembled. Because the oil path is formed regardless of the position of the scroll member, oil may be introduced into the interior of the housing through the suction port without generating an overflow of oil to the outside of the housing.

Abstract: This compressor 1 is for compressing an introduced working gas to a predetermined pressure and exhausting by means of the rotation of a crank shaft 5 which is rotatively supported by a front case 4 of a housing 1A by a main bearing 6, and has a partition means 31 (labyrinth seal for example) which is provided between the main bearing and a shaft seal 28 which is provided at the outer side of the main bearing along the axial direction, and separating a space in which the shaft seal is provided from a low pressure chamber 15 of the housing to form a sealing chamber 30, and a first lubricating agent supply passage 29 which is formed in the housing and is opened to the sealing chamber for supplying a lubricating agent to the sealing chamber. A part of the highly compressed lubricating agent which is supplied the sealing chamber can be leaked to the low pressure chamber via the partition means during the operation of said compressor.

Abstract: A rotary-screw air compressor having a separator, a cooler fan assembly, and a mounting apparatus. The separator has a first chamber and a second chamber. The first chamber separates compressed air and coolant. The second chamber separates compressed air and moisture. The separator is disposed in a chasm formed by a first platform. The mounting apparatus elevates a motor and air end vertically above and spatially apart from the separator. A cooler fan assembly is vertically above the motor and air end. The cooler fan assembly has a first heat exchanger vertically above a second heat exchanger. A shroud having an opposite open end is connected to the first heat exchanger at one open end and the shroud is connected to the second heat exchanger at the other open end. A cooler fan is disposed completely within the shroud and between the first and second heat exchangers.

Abstract: In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers is formed when the positional relationship between the displacer and cylinder is for a gyration, the wear is reduced between the cylinder and displacer. Sliding portions between the displacer 5 and a cylinder 4 are fed with a lubricating oil 12 by forming an oil-feeding groove 5c in the surface of the displacer 5 so as to extend from the central portion of the displacer 5 to the vicinity of a suction port 7a, and feeding the lubricating oil 12 from the central portion of the displacer 5, so that the wear can be reduced.