Abstract: Scroll compressors may preferably include a stationary scroll, a drive shaft, a crank shaft coupled to the drive shaft and a bush coupled to the outer surface of the crank shaft. A seal is preferably disposed between the bush and the crank shaft and the seal is elastically deformable in the radial direction of the crank shaft. A movable scroll may be coupled to the crank shaft and disposed adjacent to the stationary scroll. A compression chamber is defined by a space between the stationary scroll and the movable scroll, such that fluid is compressed within the compression chamber when the movable scroll revolves or orbits with respect to the stationary scroll. Further, a discharge port is preferably defined within the movable scroll and adapted to release the compressed fluid to a side that is opposite of the stationary scroll.

Abstract: To offer the seal configuration which prevents the leakage of high pressure compressed fluid from the succeeding stage compression section to the preceding stage compression section of a multistage compression type fluid machine, a seal element 25 is located on the rand 9a between the discharge port 2e located at the end of the spiral lap groove of the preceding stage compression section and the suction port 2f located at the start of the spiral lap groove of the succeeding stage compression section to suck in the compressed fluid discharged from said discharge port and cooled through passing a cooler.

Abstract: A compressor assembled under desirable working conditions at a low cost is disclosed. In the compressor, the first rolling bearing for permitting axial movement of the shaft is inserted into the first housing from the side where the compression mechanism is to be provided, and the second rolling bearing for restricting axial movement of the shaft is inserted into the first housing from the other side where the driving source is to be provided. The shaft is inserted into the first housing from the side where the compression mechanism is to be provided. A seal member is further provided between the rolling bearings for sealing an area between the insertion hole and the shaft, wherein the seal member is inserted into the insertion hole of the first housing from the side where the compression mechanism is to be provided before the shaft is inserted into the insertion hole.

Abstract: A scroll compressor comprises a fixed scroll having a spiral-shaped wall body, and a swiveling scroll which has a spiral-shaped wall body and revolves while linking together the two wall bodies; the wall bodies have steps, and side faces of two end plates have high and low bottom faces in correspondence with the steps; a chip seal is provided along a join edge which connects top edges on different sides of each step, and a mechanism is provided therebetween to prevent the chip seals from becoming removed from the join edges. Furthermore, in the same scroll compressor, chip seals are provided respectively in two grooves, and join paths are provided respectively between a high-pressure compression chamber, which is formed with the bottom faces as one section, and the two grooves; the pressure inside the high-pressure compression chamber is used as a pressing force for the chip seals.

Abstract: A scroll compressor comprising paired fixed and movable scrolls, the fixed scroll of each pair having an end plate provided with a scroll body projecting from the end plate and the movable scroll of each pair having an end plate provided with a scroll body projecting from the end plate, wherein the movable scroll meshes with the fixed scroll to form a plurality of operation chambers between them and revolves relative to the fixed scroll to compress gas in the operation chambers is characterized in that two pairs of fixed and movable scrolls are disposed with back faces of the end plates of the fixed scrolls opposite each other, the movable scrolls are integrally connected with each other, a main shaft for revolving the movable scrolls passes through the two pairs of fixed and movable scrolls to operatively engage the movable scrolls, and an outlet chamber is disposed between the end plates of the fixed scrolls.

Abstract: A scroll compressor has a unique oil supply port for supplying lubricant to both the seals and the Oldham coupling. The oil supply port is positioned at a location such that it will not likely result in undue amounts of lubricant being entrained into the refrigerant leading into the compression chambers. The present invention is thus an improvement over the prior art.

Abstract: A back pressure regulation mechanism is incorporated in a scroll compressor. The compressor includes a fixed scroll and a spacing member fixed inside a casing to define a high pressure chamber behind the fixed scroll. The back pressure regulation mechanism includes a boss formed on the fixed scroll and extending through the spacing member into the high pressure chamber whereby a first force caused by pressure difference acts upon the boss and thus the fixed scroll, a plurality of bores defined in the spacing member, each bore being in communication with the high pressure chamber and the fixed scroll, and a back pressure regulation device accommodated in each bore and including a pin received in the bore and movable between upper and lower limit positions, a washer engaging the fixed scroll and a disk spring arranged between the pin and the washer. A second force caused by the pressure difference acts upon the pin and is transmitted to the fixed scroll via the disk spring and the washer.

Abstract: A scroll type compressor includes a fixed scroll member, a movable scroll member, an inlet, a discharge port, a discharge valve, a first pressure region and a second pressure region. The inlet is formed through the fixed scroll base plate. The discharge port is formed through the movable scroll member. The discharge valve opens and closes the discharge port. The first pressure region and the second pressure region defined at opposite sides of the movable scroll member apply pressure to the movable scroll member. Gas introduced through the inlet is compressed and highly pressurized in accordance with the movable scroll member orbiting with respect to the fixed scroll member. The highly pressurized gas is discharged from a compression region via the discharge port and the discharge valve. The compressor is provided with a communication passage so as to intercommunicate the first pressure region and the second pressure region during a predetermined period of a compression cycle established by the gas.

Abstract: Scroll compressor may include, for example, a stationary scroll, a drive shaft, a crank shaft coupled to the drive shaft, a bush coupled to the outer surface of the crank shaft and a movable scroll coupled to the crank shaft. The movable scroll is preferably disposed adjacent to the stationary scroll. A boss may be coupled to the movable scroll and the boss preferably protrudes from the movable scroll at the opposite side of the stationary scroll. A seal is preferably disposed in a clearance defined between the bush and the boss. A compression chamber is defined by a space between the stationary scroll and the movable scroll. Fluid is compressed within the compression chamber when the movable scroll revolves or orbits with respect to the stationary scroll. A discharge port is preferably defined within the movable scroll and is adapted to discharge compressed fluid to a side that is opposite of the stationary scroll.

Abstract: In a double toothed type scroll compressor, spiral wraps are formed on both sides of an end plate of an orbiting scroll, and wraps adapted to engage with the spiral wraps are formed on a stationary scroll. A dust wrap is formed on a side diametrically outside of the wrap of the stationary scroll. Grooves are formed on ends of the respective wraps to receive therein seal members formed of a high polymer material. Electric charge of static electricity produced when the seal members slide on surfaces of the mating end plate is made to flow from a bolt provided on an end of a crankshaft to the stationary scroll through a brush, thereby preventing accumulation of electric charge in a crankshaft.

Abstract: A scroll compressor having a simple structure is disclosed, which effectively decreases the thrust load imposed on the revolving scroll without degrading the compression efficiency. The scroll compressor includes a casing; a fixed scroll provided in the housing and comprising an end plate and a spiral protrusion built on one face of the end plate; and a revolving scroll provided in the casing and comprising an end plate and a spiral protrusion built on one face of the end plate, wherein the spiral protrusions of each scroll are engaged with each other so as to form a spiral compression chamber.

Abstract: The oil passage for lubricating a seal means, which separates a high discharge pressure area inside a compressor and a low pressure area inside the compressor with a surface of a rotating member, can be eliminated. A lip seal 37, which is interposed between a center housing 12 and a circumferential surface of a rotating shaft 14, is prevented from being withdrawn from an insertion hole 121 by a circlip 38. A support portion 122, which forms a part of the insertion hole 121 and supports the lip seal 37, extends out into a motor housing 13. An outlet port 324 of a discharge passage 32 is directed to the top portion of the support portion 122 and the circlip 38.

Abstract: The pressure leakage from the back pressure chamber installed at the back side of the movable scroll to the low pressure area can be prevented. An eccentric shaft (17) formed integrally to a drive shaft (14) is inserted into a bushing (19). A balance weight (18) is fixed to the bushing (19). A cylindrical portion (34) is provided so as to protrude at the back side of the movable scroll base (22), and the bushing (19) supports the cylindrical portion (34) via a needle bearing (21). A seal member (35) is interposed between the end surface of the cylindrical portion (34) and the balance weight (18). The inside of a cylinder of the cylindrical portion (34) is made to be a back pressure chamber (36).

Abstract: The present invention has as an object providing a scroll compressor that transmits rotation of the eccentric axle side end plate of the orbiting scroll to the involute wrap side end plate with good efficiency, and sufficiently presses the involute wrap side end plate continuously against the fixed scroll without causing friction with the seal member; in order to attain this object, the present invention provides a scroll compressor providing a fixed scroll comprising an end plate and an involute wrap provided on one face of the end plate, and an orbiting scroll comprising and end plate, an engagement part provided on one face of the end plate and accommodating an eccentric axle therein, and an involute wrap provided on the other face of the end plate and forming a plurality of compression chambers by the combination with the involute wrap of the fixed scroll, wherein the end plate of the orbiting scroll is divided along the axial direction thereof into an involute wrap side end plate providing an involute wr

Abstract: An involute spiral wrap scroll-type device uses two pairs of spiral wrap members connected together at opposite ends of a common rotational shaft. The device can be operated in either an expansion mode or a combination hybrid mode where each pair of spiral wrap members functions as a compressor and expander, respectively. In an expansion mode, electric current is produced via generator electrically responsive to shaft rotation. In hybrid mode, a first spiral wrap member pair functions as an expander with the second spiral wrap member pair functioning as a compressor. In this mode, the balance of shaft power between that produced by the expander and that absorbed by the compressor is either supplied by the motor/generator functioning as a motor, or converted into electricity by the motor/generator functioning as a generator. The housing can be hermetically sealed, thus promoting contamination-free operation.

Abstract: A scroll-type compressor having a fixed scroll and a movable scroll. The fixed scroll includes a fixed base plate and a fixed volute wall extending from the fixed base plate. The movable scroll includes a movable base plate and a movable volute wall extending from the movable base plate. The movable volute wall has a distal end surface that faces the fixed base plate. A passage is formed through the movable volute wall and the movable base plate from the distal end surface. The passage reduces the area of the distal end surface of the movable volute wall, on which pressure is applied. This reduces the thrust load applied to the movable scroll and makes the compressor more reliable.

Abstract: A scroll fluid machine having a stationary scroll and a revolving scroll characterized in that one of the scrolls 12, each scroll having a spiral scroll lap spiraling from the center side to the outer side, has an annular outermost lap 12a having a radius larger than that at the outer end of the spiral lap of the other scroll 11, the annular, outermost lap 12b and 12b′ being the outermost wall, and the scrolls are assembled so that the lap 11a of the other scroll 11 is disposed in the inner side of the lap 12a of the said one of the scrolls.

Abstract: An improved scroll compressor having an axially movable non-orbiting scroll eliminates the need for a separator plate. With the elimination of the separator plate, a back pressure chamber is provided to resist the discharge pressure which will be directed against a rear face of the non-orbiting scroll. In other embodiments, a seal on the rear of the non-orbiting scroll contacts the inner periphery of the end cap. Various ways of increasing the discharge pressure volume, or eliminating undesirable noise are also disclosed. Further, several ways of connecting the end cap to the center shell are also disclosed.

Abstract: Scroll compressors having a non-orbiting scroll the type that moves axially for a limited distance are provided with an economizer fluid tube. The economizer tube is received within an opening in the non-orbiting scroll such that the non-orbiting scroll can move relative to the tube. This is an improvement over the prior art, and provides a more secure and simple connection.

Abstract: A scroll compressor includes back-pressure chamber seals which are mounted eccentrically relative to a shaft rotational axis. Because of the seal eccentricity, the back chamber force, which prevents fixed and orbiting scroll separation, also acts eccentrically. The eccentric back chamber force creates an overturning moment. The direction of eccentricity is selected such that this overturning moment counteracts the scroll tipping moment of the tangential gas force. Therefore, the back chamber force and thrust force between the non-orbiting and orbiting scrolls are minimized. Also the back chamber area between the seals is reduced. The reduction of thrust force minimizes scroll wear and reduces friction, while back chamber area reduction frees up additional space in the scroll environment which can be utilized for other purposes.

Abstract: The scroll pump has the capability of preserving a minimal play between the joints disposed on the ridges of each of the spiraling walls and the flat wall facing it. Such an arrangement, possible owing to the slight difference in pressure prevailing between two adjacent transfer chambers, makes it possible to prevent wear and tear on the joints, soiling of the transfer chambers as well as overheating due to friction on the joints.

Abstract: In a compressor with a scroll compression mechanism having a stationary scroll and a movable scroll, a bearing through which the movable scroll is rotatably connected to a crank portion is disposed in a bearing box. The bearing box is provided for defining a back side room into which high-pressure refrigerant discharged from a discharge hole of an end plate of the movable scroll is introduced. The back side room is partitioned from the compression room by the end plate of the movable scroll to be opposite to the compression room, and a seal member which is disposed to air-tightly partition the back side room and a suction room of the compressor. Thus, a discharge pressure of refrigerant is applied from a back side of the movable scroll only at a position corresponding to the back side room. Accordingly, it is possible to reduce a compression thrust force without using a pressure adjustment valve.

Abstract: It is an object of the present invention to improve the efficiency of a scroll gas compressor by operating a bypass at a proper compression ratio. To achieve the object, the present invention is constituted so that at least one pair of bypass holes whose one ends are opened in a compression chamber currently performing compression nearby a discharge vent and whose other ends communicate with a discharge chamber are asymmetrically arranged on a panel board. This structure makes it possible to improve the efficiency of the compressor by operating the bypass at an optimum compression ratio even if a difference is observed between pressure rises of a pair of symmetric compressed spaces under the compression process.

Abstract: A single piece tip seal for use in scroll compressors is produced using a polyetheretherkeytone base material injected into a mold having two ingates to the mold cavity.

Abstract: A scroll-type compressor has a front housing, a stationary scroll, and a rear housing arranged in this order. A movable scroll is arranged in a space formed in the front housing and the stationary scroll and opposed to the stationary scroll so that the movable spiral wall engages with the stationary spiral wall. A rotatable shaft is supported by the rear housing and extends through the stationary scroll base plate toward the movable scroll. An orbital rotating mechanism is arranged at the end of the rotatable shaft to cause the movable scroll to orbitally rotate. The orbital rotating mechanism and the rotatable shaft are arranged on the side of the movable spiral wall with respect to the movable scroll base plate.

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 vertical compressor is converted to a horizontal compressor by laying the vertical compressor on its side and locating it within the standard shell of a larger vertical compressor. The end caps and partition of the smaller compressor are removed while the end caps and the partition of the larger compressor are added. A lubricant pump pumps lubricant from the sump defined between the two shells to all areas of the compressor requiring lubrication.

Abstract: To resolve a problem of decreasing a heat exchange rate of a refrigerating cycle owing to a large amount of a refrigerator oil delivered from a discharge pipe to the refrigerating cycle, there is provided a sealed compressor driven by a motor having a compressor unit and a motor unit in which a ring is provided at an outer periphery of a coil end of a stator on a side of the compressor unit to reduce the amount of delivering the refrigerator oil to the refrigerating cycle and a shape of a balance weight of a rotor on the side of the compressor unit is formed in a cylindrical shape a portion of a side face of which is opened and an end face of which is flat to thereby reduce stirring of fluid.

Abstract: An inclined surface is formed in an upper inside wall of housing. The inclined surface inclines downwardly toward a lip seal. Lubricant oil supplied to the upper end of the inclined surface flows along the inclined surface without dropping downwardly due to surface tension, and flows to the lower end of the inclined surface then reaches the lip seal. Thus, the lubricant oil is supplied to the lip seal with certainty, thereby suppressing the wear of the lip seal and improving the durability of the compressor.

Abstract: A scroll compressor which can be easily sealed and assembled is presented. Also a scroll compressor which can be sealed easily and at low cost is presented. It includes a cylindrical front casing with a bottom, a rear cover to be fitted to the inner circumference of the front casing, a fixed scroll having an end plate to be fitted to the inner circumference, a fitting portion to be fitted concentrically to the rear cover, and a spiral blade disposed at the opposite side of the fitting portion, a movable scroll engaged with the fixed scroll and swiveling at a specified radius of swivel, and a rotation preventive mechanism for preventing rotation of the movable scroll and permitting swivel motion only.

Abstract: An improved seal for defining a back pressure chamber in a scroll compressor includes a tab extending toward the rear face of the orbiting scroll. The tab reduces the contact force created against the rear face of the orbiting scroll by the gas pressure in the back pressure chamber. Thus, the inventive seal increases seal life.

Abstract: A scroll machine is provided with a muffler mounted to the fixed scroll of the scroll machine for improved sound attenuation.

Abstract: A scroll compressor back pressure chamber seal protector is operable to prevent the seal from moving away from a separator plate during reverse rotation. During reverse rotation, a check valve associated with the seal communicates a higher pressure fluid into the back pressure chamber such that a low pressure from an intermediate pressure chamber will not pull the seal away from the separator plate. In this way, the seal is maintained in contact with the separator plate during reverse rotation.

Abstract: A scroll compressor assembly incorporates a separator plate which has a clearance between its outer periphery and an inner periphery of an end cap. In this way, the location of the separator plate along the center axis of the scroll can be adjusted. Further, the separator plate is placed on the center shell prior to attachment of the end cap. Thus, the separator plate need not be welded to the end cap as in the prior art. Problems such as weld splatter thus eliminated.

Abstract: A scroll compressor is provided with structure that allows a reduction or modulation in mass flow capacity. Structure is provided for controlling the back pressure force tending to bias one scroll into other. This structure defines two distinct back pressure chambers. Pressure fluid is not supplied to at least one of the back pressure chambers during modulated operation.

Abstract: A scroll-type vacuum pump wherein an expander and a compressor are arranged in series, in two stages, in the same housing and driven by the same shaft. The first stage is a scroll-type expander. It is in series with a scroll-type compressor, which is the second stage. The volume of the suction pockets of the second stage, the compressor, is not significantly smaller than the volume of the discharge pockets of the first stage device, the expander. Thus, the amount of heat associated with the re-expansion and compression process is reduced. The two stage pump also includes a double shaft seal mechanism which seals off the suction chamber of the expander from both the ambient and the discharge chamber of the expander. The two stage pump of the invention further includes a labyrinth structure at the tip surfaces of the scroll elements to tightly control the axial gap between the tips and bases of the mating scroll elements.

Abstract: A scroll mounting member for mounting a drive scroll therein is secured to the left end of a drive shaft coupled to a motor. A rotary bearing is fitted on the outer periphery of the scroll mounting member, and its outer periphery is secured to a scroll housing. The scroll mounting member is disposed for rotation in the scroll housing and is secured to the drive shaft. A bearing retainer for holding the rotary bearing is mounted by bolts via a spring in a mounting portion of the scroll housing. The rotary bearing is adjustable in the thrust direction at the scroll housing. By turning bolts, the rotary bearing is either advanced in the thrust direction via the bearing retainer or retreated, via the bearing retainer and a spring, which, together with the bolts, form an adjusting device. A self-lubricating sleeve seal is axially slidably fitted in an end portion of a driven scroll mounting member.

Abstract: In a scroll compressor provided with a fixed scroll member (4) and a movable scroll member (3) which define a plurality of compression spaces (6) therebetween in cooperation with each other, a hole (32) is formed to the fixed scroll member to be communicable with adjacent ones of the compression spaces. The adjacent compression spaces are different from each other in pressure when the scroll compressor is driven. A piston valve (33) is disposed in the hole and controls communication between the adjacent compression space through the hole. The compression spaces are movable with volumes reduced by movement of the movable scroll member.

Abstract: An improved seal for use in scroll compressors incorporates a slanted coil spring. In the prior art, generally C-shaped leaf springs have been utilized. The slanted coil spring has better survivability against operational extremes than the prior art.

Abstract: A compressor which can be easily assembled and can prevent damage of seal members is presented. Its assembling method includes of (a) a step of feeding a front casing having a first inner circumference, a second inner circumference, an opening, a bottom, and a side wall, compression units having a first fitting portion and a first seal groove, and a rear cover having a second fitting portion and a second seal groove, (b) a step of installing a first seal member in the fist seal groove, (c) a step of installing s second seal member in the second seal groove, (e) a step of installing the fixed scroll on the front casing, while fitting the first fitting portion to the first inner circumference, and (f) a step of installing the rear cover to the front casing so as to cover the opening, while fitting the second fitting portion to the second inner circumference.

Abstract: A compressor which can be easily mounted on a vehicle or the like is presented. It includes a front casing having a bottom and an opening, and a rear cover placed to seal the opening. The front casing has a mounting penetration hole placed in the bottom, a base for mounting outside, a suction port for sucking a refrigerant, and a discharge port for discharging the refrigerant. A shaft exposed outside from the mounting penetration hole, a movable scroll allowed to swivel by rotation of the shaft, and a fixed scroll having a discharge hole are placed in the front casing. The refrigerant enters from the suction port, and is compressed by the movable scroll and fixed scroll, and is discharged from the discharge hole into the discharge chamber formed by the fixed scroll and rear cover, and is discharged from the discharge chamber through the discharge port.