Abstract: The disclosure describes a scroll compressor which incorporates a spring biased floating seal to facilitate the start-up for the compressor. The spring biased floating seal opens a discharge to suction leakage path before and during start-up for the compressor. After a few revolutions of the scrolls of the compressor the floating seal is biased against the load of the spring to close the leakage path due to pressurized working fluid of the compressor working against the biasing of the springs.

Abstract: A scroll type machine is disclosed which incorporates an improved mounting arrangement for the non-orbiting scroll member which mounting arrangement greatly facilitates manufacturing and assembly, effectively prevents radial displacement of the non-orbiting scroll member, and offers the advantages of axial compliance. In one embodiment, the non-orbiting scroll is axially movably secured to a bearing housing by means of a plurality of bolts or bolts and sleeves. In another embodiment a rigid annular ring serves to axially movably secure the non-orbiting scroll to the bearing housing while in a third embodiment a stamped ring is secured to both the non-orbiting scroll and the bearing housing. In another embodiment a two piece main bearing housing includes an integral ring for radially positioning the non-orbiting scroll member and means for securing anti-rotation and axial stop means thereto.

Abstract: A scroll compressor includes a compression mechanism having a stationary scroll and an orbiting scroll in engagement with each other, a crank shaft for causing orbiting of the scroll relative to the stationary scroll, a bearing member for rotatably supporting the crank shaft and having a thrust bearing for axially supporting the orbiting scroll, an electric motor for driving the crank shaft, and an eccentric bearing radially movably accommodated within a recess defined in an end portion of the crank shaft. The orbiting scroll has a shaft journaled in the eccentric bearing. A leaf spring is interposed between the eccentric bearing and a side wall of the recess for pressing the eccentric bearing radially outwardly. The eccentric bearing has inclined planes defined on an external surface thereof for receiving a biasing force of the leaf spring so that an axial component of the biasing force is directed towards the crank shaft.

Abstract: A scroll compressor includes an orbital drive mechanism for causing orbiting of an orbiting scroll relative to a stationary scroll. The orbiting scroll is formed with a generally cylindrical boss extending in a direction away from the stationary scroll. The orbital drive mechanism includes a main shaft rotatably supported by a compressor housing, an eccentric shaft extending from one end face of the main shaft and having a longitudinal axis parallel to, but offset laterally from a longitudinal axis of the main shaft, and an eccentric bush having a socket inserted rotatably into the cylindrical boss. The eccentric shaft, engaged in the socket, is of a non-circular cross-section having short and long axes perpendicular to each other.

Abstract: A structure for preventing axial leakage in a scroll compressor includes a fixed scroll, a closer mounted on the fixed scroll, a discharge chamber formed on the closer, a discharge port formed at the center of the fixed scroll, and a variable back pressure formed between the closer and the fixed scroll. The variable back pressure chamber is formed penetrating to the discharge chamber by a polytetrafluoroethylene(PTFE) or a piston. By the polytetrafluoroethylene(PTFE) having uniform expansion coefficient and the piston, the variable back pressure chamber is closed in case of high discharge pressure and opened in case of low pressure. A downward sealing force is acting on small area of a upper surface of the fixed scroll in case of high discharge pressure and broad area in case of low pressure.

Abstract: A scroll compressor having a housing containing a non-orbiting scroll and an orbiting scroll and a crankshaft having an eccentric mounted on the orbiting scroll, the non-orbiting scroll being fixed in operative position on the housing by a plurality of pairs of cooperating, mating key and keyway type components provided on the housing and non-orbiting scroll and mating with predesigned pressure contact, wherein all of the pairs have been mated with substantially equal pressure contact prior to fixing the positions of the pairs on the housing, and wherein the mated pairs allow axial compliance motion of the non-orbiting scroll while providing predetermined resistance to the motion.

Abstract: A scroll machine has a sealed housing divided into a high-pressure side and a low-pressure side by a discharge cover, a stationary scroll and a swivel scroll housing within the low-pressure side of the sealed housing, a frame with legs fixed within the sealed housing, a support spring through which the stationary scroll is attached to the top ends of the legs of the frame, and an intermediate pressure chamber formed by sealingly engaged parts of the rear portion of the stationary scroll and an inner surface of the discharge cover so that the stationary scroll will be pressed against the swivel scroll by hydraulic pressure introduced into the intermediate pressure chamber.

Abstract: A compressor has a movable scroll supported on a bushing connected to a rotary shaft via an eccentric pin. The movable scroll and the bushing are disposed coaxial to the eccentric pin to rotate together with the eccentric pin. The movable scroll moves along a predetermined circular path around an axis of the rotary shaft to closely contact a fixed scroll, opposed to the movable scroll at a given portion to define a displaceable fluid pocket and compresses refrigerant gas introduced into the fluid pocket. The compressor comprises a first balance weight eccentrically supported on the eccentric pin for an integral rotation therewith. The first balance weight is arranged to generate first centrifugal force counteracting second centrifugal force generated in the movable scroll and the bushing based on the rotation of the movable scroll and the bushing.

Abstract: The present invention provides a structure for preventing an axial leakage in a scroll compressor. The structure prevents a fixed scroll from rotating on its own axis or swinging in its radial direction, when the fixed scroll is pushed toward an orbiting scroll by refrigerant pressure in a discharge chamber, thereby the axial leakage is precluded. The structure includes a plurality of guide holes formed at the outer circumferential portions of a fixed scroll, and a plurality of projections formed at the outer circumferential portions of a main frame and inserted into the guide holes respectively, so as to allow a sliding movement of the fixed scroll in its radial direction.

Abstract: A scroll-type machine has a motion controlling member for preventing relative rotation between a first and a second scroll member while allowing relative orbiting motion therebetween. The scroll-type machine includes a novel arrangement of a spring or other flexible member for biasing the motion controlling member in a specific direction. The biasing of the motion controlling member operates to reduce the mechanical impact noise or rattle which is caused by the vibration of the machine's operating components.

Abstract: A scroll type fluid machine includes a lever 26 moved to draw a conical locus so that revolution is given to an orbiting scroll member 2, to thereby lower a sliding load and a sliding speed of a sliding portion on which a load is acted in a radial direction by the above principle. Further, the orbiting scroll member is supported in a thrust direction by a thrust force transmission member 50 interposed between the orbiting scroll member 2 and a fixed scroll member 1 to thereby lower a sliding speed of the sliding portion on which a load is acted in the thrust direction. With this arrangement, a scroll type fluid machine having high efficiency and durability can be provided.

Abstract: A locating mechanism of the fixed volute of a scroll compressor comprises a frame, a fixed volute and an orbiting volute. The frame is provided with a predetermined number of locating faces having thereon respectively a locating member which is fastened with the frame and has a sliding connection face of an arcuate construction. The fixed volute is provided with a predetermined number of shoulders which are corresponding in location and number to the locating members and are provided respectively on the outer side thereof with a sliding connection face of an arcuate construction and engageable with the sliding connection face of the locating member. The fixed volute can be caused to slide up and down along the sliding connection face of the locating member. The sliding connection face of the locating member is provided on the top thereof with a retaining portion for preventing the fixed volute from moving upward.

Abstract: The pressure of a discharged refrigerant gas introduced into a rotary scroll (18) in the portion opposing a compression chamber is utilized to urge the rotary scroll (18) toward the compression chamber so as to maintain the axial directional gap of the compression chamber at a small value. A tip seal (98) is disposed while allowing a small gap for a spiral tip seal groove (98) formed at only the front portion of a rotary scroll wrap (18a) so that the rotary scroll (18) is pushed toward a fixed scroll (15) by the urged pressure of the discharged refrigerant gas introduced into a back pressure chamber (39) of the rotary scroll (18). As a result, enlargement of the axial directional gap of the compression chamber is prevented.

Abstract: A scroll compressor having a driving shaft 6, on which a bushing 10 and a balancing weight 9 are supported. The drive shaft 6 includes, at its end, a drive projection 6a, which is engaged with a driven groove 10a formed in the bushing 10. A spring 20 is arranged between the drive projection 6a and the bushing 10 for urging the latter radially inwardly to reduce the radius of the orbital movement of the bushing 10. A centrifugal force generated in the bushing when the drive shaft 6 is rotated causes the bushing 10 to be moved radially outwardly to increasing the radius of the orbital movement of the bushing 10.

Abstract: An apparatus for adjusting an orbital radius in a scroll compressor includes transmitting elements driving an orbiting scroll in accordance with the movement of a driving shaft and a stopper controlling the moving range of the transmitting elements with respect to the center of the driving shaft. The transmitting elements, including a bushing, are movably provided between the driving shaft and the orbiting scroll, so as to allow the distance between the center of the driving shaft and the center of the transmitting elements to change. The stopper is assembled to the transmitting elements in order that the position of the stopper is controllable. As for the stopper, there is provided a screw which is fastened into a screw hole formed on one side of the driving shaft or the bushing, thereby limiting movement of the driving shaft or the bushing.

Abstract: A scroll compressor comprising a rotation constraining device for restricting the rotation of the orbital scroll toward the principal axis rotational direction and for extending the constraining range of the orbital scroll toward the principal axis reverse rotational direction, and a compression chamber torque forming device for causing a pressure in a first compression chamber to be larger than that in a second compression chamber when the pressure in the compression chambers rises up abnormally high. The first compression chamber is formed between the wrap member inside surface of the fixed scroll and the wrap member outside surface of the orbital scroll and the second compression chamber is formed between the wrap member outside surface of the fixed scroll and the wrap member inside surface of the orbital scroll.

Abstract: A scrool fluid machine including a fixed scroll an orbiting scroll an Oldham ring and bearing portions which are entirely or partly made of a reaction-bonded precise sintered ceramics which is superior in near-net-shape property, and particularly made of a reaction bonded precise sintered ceramics which is produced by reaction-bonding inorganic compound particles such as A1.sub.2 O.sub.3, SiC, TiN, ZrN etc. with Si.sub.3 N.sub.4 which is a nitride of Si.

Abstract: In a scroll compressor, under conditions favoring reverse operation, the scroll wraps are separated so as to provide a continuous, unimpeded path through the scrolls. Spring bias, a repositioning of driving contact areas and/or force areas can be used singly or in combination to cause separation of the wraps.

Abstract: Rolling element bearings are located between the eccentric drive pin and the slider block of a scroll compressor. The rolling elements reduce static or boundary lubrication friction by an order of magnitude in providing rolling friction. As a result, movement of the orbiting scroll into and out of flank contact is facilitated and scroll separation takes place earlier in the shutdown process.

Abstract: An infinitely variable scroll-type fluid displacement apparatus comprises an orbiting scroll having a spiral element interfitted with a spiral element of a base scroll. The orbiting scroll and the base scroll are both rotatably disposed in the compressor housing and operationally connected through a rotation prevention mechanism. The orbiting scroll is continuously driven by a drive shaft, even when fluid is not displaced through the scroll-type fluid displacement apparatus. The base scroll is mounted on a carrier which has magnetic rotor elements extending in close proximity to an electromagnet. When the electromagnet is energized, an attraction force is generated between the electromagnet and the magnetic rotor elements, thereby imparting a braking force to the base scroll. Depending on the amount of braking force imparted to the base scroll, the capacity of the scroll-type fluid displacement apparatus can be infinitely varied.

Abstract: A scroll-type machine has a motion controlling member for preventing relative rotation between a first and a second scroll member while allowing relative orbiting motion therebetween. The scroll-type machine includes a novel arrangement of a spring or other flexible member for biasing the second scroll member in a torsional direction. Biasing of the second scroll member operates to reduce the mechanical impact noise or rattle which is caused by the vibration of the machines operating components.

Abstract: This invention relates to the prevention of leakage caused by the gap between the tip member of a scroll wrap and the end plate of the other scroll, and the axial leakage apparatus of a scroll compressor for reducing the power loss caused due to the use of the compressed refrigerant gas at the time of the prevention of leakage, which is accomplished by the axial leakage resistant apparatus of a scroll compressor including the pressurization member to pressurize the fixed scroll toward the lower shaft of the crankshaft with a part of the refrigerant gas of high pressure exhaled into the exhalation chamber and the control member to control the compression interval of the fixed scroll by the pressurization of the above pressurization member.

Abstract: A scroll-type compressor which is particularly suited for use as a refrigerant compressor has a biasing chamber for pressure biasing the non-orbiting scroll to augment tip sealing. The biasing chamber communicates with the fluid pockets of the compressor through a biasing passage extending through the end plate of the non-orbiting scroll. The biasing passage is in fluid communication with the innermost fluid pocket during only a portion of each of the cycles of orbiting motion and in fluid communication with an intermediate fluid pocket during another portion of the cycles orbiting motion.

Abstract: An orbiting scroll is made with a ceramic particle reinforced aluminum metal matrix composite. The resultant part has increased wear resistance, closer thermal expansion matching with cast iron, can be used without tip seals and offers the advantages associated with a reduced mass. In manufacturing the part, the part is pressure cast to a near net shape and machined to the final shape.

Abstract: A reliable scroll-type compressor is provided which, even when the compressor is rotated in the reverse direction by the erroneous connection of the power source terminals for example, it prevented from establishing a vacuum state within the compression chamber and no damages occur in the addendum of the stationary scroll and the orbiting scroll. Since the sliding surface of the slider is arranged to have an angle so that the slider is moved therealong in the direction in which the revolution radius of the orbiting scroll of the compressor is decreased, a clearance is generated between the stationary scroll and the orbiting scroll upon the reverse rotation.

Abstract: An axial sealing mechanism of a volute compressor comprises a fixed volute member, a orbiting volute member, and an isolating member which is fastened to the back of the fixed volute member and provided with back pressure chambers into which an intermediate-pressure working fluid or a high-pressure working fluid is introduced via the compression chambers formed by the fixed volute member and the orbiting volute member. The pressing member in the back pressure chamber is therefore forced to urge axially the fixed volute member so as to overcome the axial thrust and the overturn moment of force, which exert on the fixed volute member at the time when the compression chambers are in operation. The axial gap between the fixed volute member and the orbiting volute member is thus minimized so as to prevent the working fluid from leaking out from the compression chambers and to improve the volumetric efficiency of the volute compressor.

Abstract: A scroll compressor includes a fixed scroll member and an orbiting scroll. The orbiting scroll member is operatively connected to a motor to be driven in an orbiting motion by the motor. The scroll members each include a plate having an inboard surface and an outboard surface. A spiral involute or wrap is formed on the inboard surface of each scroll member plate. The involutes mate to define suction zones at outer ends of the involutes and fluid pockets. The fixed scroll member defines a fluid outlet at the center of the involutes and two inlets positioned proximate the suction zones. At least two idler crank assemblies are provided to maintain the phase relationship and running clearance between the scroll members. The idler crank assemblies each include two operatively connected cranks, one being in the fixed scroll and one being in the orbiting scroll. The fixed scroll crank is externally accessible so that its rotational motion may be harnessed to drive a fan or another compressor stage, for example.

Abstract: A high side co-rotational scroll compressor has lubricant sumps in both the discharge and suction pressure portions of its hermetic shell as well as a pressure biasing arrangement by which the scroll members are urged together in operation to minimize internal leakage. Lubrication of the bearing in which the driven scroll member rotates as well as to the bearing in which the idler scroll member rotates, both of which are located in the suction pressure portion of the shell, is provided for. Additionally, embodiments are taught by which the interface between the tips of the wraps of each scroll member and the end plate of the opposing scroll member are lubricated and by which the seal in the axial pressure biasing arrangement is lubricated and/or shielded from debris having the potential to damage it.

Abstract: A scroll compressor comprises a stationary scroll and an orbiting scroll driven by a shaft. The shaft has an eccentric pin disposed in a slot of a bushing which is mounted in the orbiting scroll. A weight is mounted for rotation with the shaft for generating a centrifugal force which is transmitted to the orbiting scroll to counterbalance a centrifugal force generated by the orbiting scroll, and thereby reduce the pressure with which the orbiting scroll bears against the stationary scroll. The weight is movable radially with respect to both the bushing and the shaft, and a spring is radially interposed between the weight and the bushing for transmitting force therebetween.

Abstract: A scroll-type fluid displacement apparatus has two interfitting spiral-shaped scroll members which have predetermined geometric configurations. The novel design provides desired displacement and a high built-in volume ratio, while at the same time achieving the optimum number of turns. The two scroll members can be either identical or non-identical. One scroll member is non-orbital and movable along its center axis. The non-orbital scroll member is urged by forces, mechanical or hydraulic, toward the other scroll member and is stopped by a positioning mechanism such that gaps are maintained between tips of one scroll member and bases of the other scroll member. A stabilizing mechanism prevents the scroll members from tipping.

Abstract: A mechanism for allowing the orbital movement of an orbiting scroll with respect to a fixed scroll in a scroll type compressor which prevents the orbiting scroll from rotating around its own axis is disclosed. The orbiting scroll is eccentrically attached to a rotary shaft supported by a housing that encases the fixed and orbiting scrolls. A compression chamber is defined by the interfitting between the orbiting scroll and the fixed scroll. During the course of the orbiting scroll's rotation around the center axis line of a rotary shaft, the volume of a compression chamber decreases as the rotation progresses. Refrigerant gas in the compression chamber is compressed in this manner as the constant volume of gas within the compression chamber decreases in size according to the progression of the rotating spiral member. A balancing weight disposed on the eccentric shaft compensates for dynamic unbalancing generated as the orbiting scroll makes an orbital movement due to the rotation of the rotary shaft.

Abstract: A scroll type refrigerant compressor having a stationary scroll unit including a spiral member, a movable scroll unit including an orbiting spiral member engaged with the stationary spiral member to define gas-pocket-like variable-volume compression chambers in which the refrigerant gas is compressed in response to a rotation of a drive shaft having an eccentrically arranged drive key member, a drive bushing member having an aperture formed therein in which the drive key of the drive shaft is inserted so as to cause an eccentric motion of the drive bushing member which is operatively engaged with the movable spiral member of the movable scroll unit to thereby drive an orbiting motion of the movable spiral member, and a mechanical space-control unit for suppressing an uncontrolled play of the drive bushing member to thereby move the movable scroll unit in a correct orbiting path with respect to the stationary scroll unit.

Abstract: A high side co-rotational scroll compressor has lubricant sumps in both the discharge and suction pressure portions of its hermetic shell as well as a pressure biasing arrangement by which the scroll members are urged together in operation to minimize internal leakage. Lubrication of the bearing in which the driven scroll member rotates as well as to the bearing in which the idler scroll member rotates, both of which are located in the suction pressure portion of the shell, is provided for. Additionally, embodiments are taught by which the interface between the tips of the wraps of each scroll member and the end plate of the opposing scroll member are lubricated and by which the seal in the axial pressure biasing arrangement is lubricated and/or shielded from debris having the potential to damage it.

Abstract: A scroll-type fluid machine in which the high-pressure chamber side (36) of a back pressure chamber (6a) using a fixed scroll (11) made of an aluminum base material can be fully sealed. The fixed scroll (11) is made of an aluminum base material, and a discharge cover (2) is made of a ferrous material. Between the U seals (35) interposed between the high-pressure chamber (36) side of the back pressure chamber (6a) and the low-pressure side, at least the U seal (35a) on the high-pressure chamber (36) side is made of glass-reinforced polytetrafluoroethylene resin, and is installed so as to be pressed against the fixed scroll (11). The U seal withstands a high temperature and large pressure difference and is installed so that the sliding mating part of the U seal (35a) is not the fixed scroll (11) made of an aluminum base material which is easily worn, but the discharge cover (2) made of a ferrous material which is less prone to wear.

Abstract: A scroll-type refrigerant compressor for use in a conventional refrigerating circuit and having liquid refrigerant compressor cooling provided by the injection of liquid refrigerant into an intermediate biasing chamber and/or specifically located bleed holes.

Abstract: A reliable scroll-type compressor is provided which, even when the compressor is rotated in the reverse direction by the erroneous connection of the power source terminals for example, it is prevented from establishing a vacuum state within the compression chamber and no damages occur in the addendum of the stationary scroll and the orbiting scroll. Since the sliding surface of the slide is arranged to have an angle so that the slider is moved therealong in the direction in which the revolution radius of the orbiting scroll of the compressor is decreased, a clearance is generated between the stationary scroll and the orbiting scroll upon the reverse rotation.

Abstract: An eccentric drive pin is located on the overhung end of a crankshaft. The drive pin is located within a bore in a slider block which is located within the hub of an orbiting scroll. Either the drive pin or the slider block bore has an axially curved surface and the other has a corresponding flat surface parallel to the axis of the crankshaft. Contact between the axially curved and corresponding flat surface remains at essentially the same axial location even though the drive pin is deflected under loading.

Abstract: A scroll type refrigerant compressor having a stationary scroll unit, a movable scroll unit including an orbiting spiral member engaged with the stationary scroll unit to define variable-volume compression chambers in which the refrigerant gas is compressed in response to a rotation of a drive shaft having an eccentrically arranged drive key member, and a drive bushing member having an aperture formed therein in which the drive key of the drive shaft is inserted so as to cause an eccentric motion of the drive bushing member operatively engaged with the movable spiral member to thereby drive an orbiting motion of the movable spiral member.

Abstract: A scroll-type compressor having a fixed scroll and a revolving scroll, wherein a portion of either the end plate of the fixed scroll or the top plate above the fixed scroll has annular grooves formed therein, allowing elastic deformation of either the end plate or the top plate in a thrust direction, thus preventing gaps between the spiral wraps of both scrolls.

Abstract: A reliable scroll-type compressor is provided which, even when the compressor is rotated in the reverse direction by the erroneous connection of the power source terminals for example, is prevented from establishing a vacuum state within the compression chamber and no damages occur in the addendum arranged to have an angle so that the slider is moved therealong in the direction in which the revolution radius of the orbiting scroll of the compressor is decreased, a clearance is generated between the stationary scroll and the orbiting scroll upon the reverse rotation.

Abstract: A scroll type compressor which prevents occurrence of abnormally high pressures due to liquid compression at the time of startup so as to lighten the engine load by providing a projection on the end face of the shaft and a groove in which the projection fits in the end face of the bush supporting a movable scroll member, the projection and groove being arranged so that their abutting faces are inclined a predetermined angle with respect to a line connecting the center of the shaft and the center of the bush in the direction opposite to the rotational direction of the shaft and being positioned relative to each other so that the extension line of the abutting faces passes through the side opposite to the side where the center of the bush is positioned seen from the center of the shaft.

Abstract: A scroll type machine is disclosed which is designed to enable it to be fully assembled prior to being installed in a hermetic shell and incorporates an improved mounting arrangement for the non-orbiting scroll member. This design enables the compressor to be tested without the need to first install it in the outer shell. This feature in combination with the mounting arrangement greatly facilitates manufacturing, assembly, testing, effectively prevents radial displacement of the non-orbiting scroll member, and offers the advantages of axial compliance. In one embodiment, the non-orbiting scroll is axially movably secured to a bearing housing by means of a plurality of bolts or bolts and sleeves. In another embodiment a rigid annular ring serves to axially movably secure the non-orbiting scroll to the bearing housing while in a third embodiment a stamped ring is secured to both the non-orbiting scroll and the bearing housing.

Abstract: A scroll type compressor having a main frame, a sub frame and a crankshaft rotatably mounted in the main frame and the sub frame via a main frame bushing and a sub frame bushing, further includes a fixed scroll and an orbiting scroll cooperable with the fixed scroll to compress gas, the orbiting scroll being drivingly mounted on the eccentric shaft portion. A barrel shaped band portion faces the crankshaft and presents a convex surface in at least one of a respective force direction of a compressive load generated in a compression chamber formed between the orbiting scroll and the fixed scroll, and a reactive force direction of a centrifugal load generated by a revolution movement of the orbiting scroll and rotary movements of upper and lower balance weights. The barrel shaped band portion is formed on the sub frame bushing.

Abstract: A parallel adjustment assembly is provided for a scroll compressor which includes an orbiting scroll and a fixed scroll. The parallel adjustment assembly includes a housing and an eccentric guide shaft having opposed first and second ends. A step is defined by the eccentric guide shaft at an intermediate position along the shaft. A first bearing is fixedly mounted on the housing. The first bearing rotatably mounts the first end of the eccentric guide shaft. The eccentric guide shaft is moveable axially with respect to the first bearing. A biasing member biases the eccentric guide shaft in a direction toward the fixed scroll. A positioner, which is made integral with the eccentric guide shaft, precisely positions the eccentric guide shaft in the thrust direction.

Abstract: A hermetic scroll-type compressor is disclosed including a housing, fixed and orbiting scroll members, a frame member having a thrust surface adjacent the orbiting scroll member back surface, and a crankshaft coupled to the orbiting scroll member. A non-sealing stabilizer ring device is disposed between the frame member and the orbiting scroll member to eliminate the small perturbation wobble remaining after the orbiting scroll member reacts with the oil pool thereby reducing scroll wear-in time. A stabilizer ring is mechanically or positively spring loaded by a wave spring washer to axially force the orbiting scroll member toward the fixed scroll.

Abstract: An orbiting rotary-type compressor including an orbiting cylindrical piston member, sealing members, cylinder housing, Oldham ring assembly and motor for permitting orbital movement. Sealing is achieved by a sliding vane moving through the orbiting piston. An axial compliance and a radial compliance mechanism promotes proper sealing.

Abstract: A scroll machine has an elastomeric member placed between the drive shaft and an unloader drive bushing of the scroll machine. The elastomeric member provides limited transverse movement between the drive shaft and the orbiting scroll member which is driven by the drive bushing. The limited transverse movement permits radial compliant engagement of the scroll wraps of the scroll machine. In one embodiment, the elastomeric member is connected to the drive shaft and a bearing plate is placed between the elastomeric member and the drive bushing for driving engagement. In another embodiment, the elastomeric member is connected to the drive bushing and a bearing plate is placed between the elastomeric member and the drive shaft for driving engagement.

Abstract: The scroll type compressor includes a stationary and orbiting scroll members, of which the spiral elements are interfit at an offset angle to form line contacts defining at least one fluid pocket, and an anti-spin mechanism for causing the orbiting member to orbit within the stationary member. A drive shaft is rotatably supported in a housing, and has an outer end a cylindrical inner end and, depending upon the embodiment, either a crank pin or a sliding guide portion projecting axially inward from its inner end. A drive bush couples the drive shaft to the orbiting scroll member, and has either a circular aperture for receiving the crank pin or an engaging slotted recess for receiving the sliding guide portion, as the case may be, whereby the drive bush is either pivotable or slidable with respect to the drive shaft. A counterweight is mounted on either the crank pin or the sliding guide portion between the drive bush and the drive shaft, and is coupled to the drive bush for conjoint movement therewith.

Abstract: A scroll type compressor 10 having a housing 12, a non-orbital scroll 24, an orbital scroll 22, an orbital scroll drive 50, an anti-rotation assembly 54, and an axial thrust load assembly. The non-orbital scroll 24 is mounted in a rear casing of the housing 12. The orbital scroll 22 cooperates with the non-orbital scroll to form fluid pockets 46 and 48. The orbital scroll 22 is driven by an orbital drive 50 to move the fluid pockets to the center of the scrolls and compress the fluid sealed in the pockets. The anti-rotation assembly 54 includes cups 94 and pins 96 which define a circular orbit that is followed by bearings 104 on pins 100. The scroll drive 50 includes a drawn steel cup 70 that is driven by a drive shaft 82. A first bore 72, with an axis offset from the axis of the drive shaft 82, receives a knuckle bushing 62 which is rotatably attached to the orbital scroll 22. A balance weight 88 is journaled on the orbital scroll 22 and is driven by pin 86.

Abstract: A scroll machine utilizing working fluid under pressure to enhance axial sealing, including several embodiments of a multi-function floating seal to isolate the axial biasing fluid, and provide vacuum protection and a degree of high pressure ratio protection.