Abstract: A vane motor comprises a casing and a vane rotor being mounted in the casing. A friction brake device is arranged in the casing and it is intended for braking, stopping and releasing the vane rotor. At least one of the two end faces of the vane rotor is part of the brake device and forms a friction pair with a braking surface of a brake element of the brake device. The brake element is arranged next to the said end face of the vane rotor and is axially movable upon actuation of the friction brake device for braking, stopping and releasing the vane rotor.

Abstract: A high-performance scroll compressor permits the prevention of the deformation of an end plate of a fixed scroll in a hermetically sealed vessel of a typical wall thickness and strength, thus obviating the need for increasing the wall thickness of the vessel or employing a material of higher strength to enhance the pressure resistance of the vessel. A partition is provided between the rear surface of the fixed scroll and the hermetically sealed vessel, and a hole of the partition is communicated with a discharge hole in the end plate of the fixed scroll. A covering member is mounted on the partition to form a muffler, and a discharge pipe is attached to the muffler.

Abstract: A fluid pressure motor of the type including a gerotor gear set (15) including a star member (31) which orbits and rotates. The motor includes valving (41) which is disposed forwardly of the gerotor gear set, and an end cap assembly (21;111) disposed rearwardly of the gerotor gear set. The star member (31) defines a central opening (89;127) at the rearward end thereof, which may be defined by a separate insert member (125). Within the end cap assembly (21;111) is a lock piston (75;133) biased by a pair of Belleville washers (85,87;121) toward an engaged position (FIG. 1; FIG. 4) in which a lock portion (79) has its beveled portion (91;135) in engagement with the central opening (89;127) of the star (31), thus preventing any further orbital motion of the star, and serving as a parking lock. The lock piston (75;133) and end cap assembly (21;111) define a pressure chamber (99;119) which may be pressurized by an external signal (95) to move the lock piston to its disengaged position (FIG.

Abstract: An orbiting scroll is engaged to and moved orbitally in relation to a fixed scroll at variable speeds. An offset surface is provided in at least one of the wraps of the fixed scroll and/or the orbiting scroll, by which a space S is created in one of the compression chambers formed between the fixed scroll and the orbiting scroll, which is thereby unsealed and opened to the inlet port side. The offset surface has a length from a position in the spiral length which satisfies the required compression ratio of one of the compression chambers in a low speed operation to the end of the spiral. An injection port is positioned such as to open to an unsealed area of this compression chamber, and gas injection shutoff and resumption is controlled through this injection port as appropriate to the situation.

Abstract: A suction pump (22) suitable for use in a fuel dispensing system (20) or other fluid delivery system for volatile liquids. The suction pump includes a pump casing that defines a pump chamber (52) with inlet and outlet ports. A rotor (54) with vanes (58) is seated in the pump chamber. The vanes define fluid cavities (96a, 96b, 96c, . . . 96f) that rotate between the inlet and outlet ports. During each turn of the rotor, each fluid cavity passes through a section of the pump chamber in which it is isolated from both the inlet port and outlet port. A bleed duct (102) extends from the outlet port. A bleed port (104) extends from the bleed duct to the section of the pump chamber that defines the isolated position of the fluid cavities. During operation of the pump, pressurized fluid discharged from the outlet port flows through the bleed duct and bleed port into the isolated fluid cavity.

Abstract: A gerotor motor (11) of the type having a spool valve (45) disposed opposite a main drive shaft (35). The motor also includes a set of brake discs (104) in engagement with an extension (45e) of the spool valve (45), and a set of brake discs (106) in engagement with internal splines (108) defined by an end cap (41). A piston (109) operable to engage the brake discs (104,106) is disposed in a chamber defined by the valve housing section (19), disposed adjacent the end cap (41). A valve drive shaft (57) having splines (53) engaging the main drive shaft (35) at its rotating end (33), also has splines (55) engaging the spool valve (45) to transmit the pure rotation of the drive shaft (35) to the spool valve (45). The result is a very compact valve drive and brake arrangement.

Abstract: A gear motor has a hydraulic oil drain path through bearings which support the spindle and mounted mower blade. The drain path is through two plain bearings and two opposed thrust bearings to a low pressure port located adjacent to the spindle shaft seal. A drain from the low pressure port through one of the hydraulic motor shafts leads to the case drain. A check valve prevents fluid from leaking through the drain should the spindle shaft seal fail. The plain bearings and thrust bearings have a press fit insert in the shape of a cylinder with a planar lip. The cylinder portion of the insert forms the plain bearing and the planar lip of the insert forms the thrust bearings. The bearing insert cylindrical surfaces have two helical grooves which extend across the cylindrical surface to conduct lubricating oil through the plain bearings. The grooves in the plain bearings communicate with similar grooves in the thrust bearings.

Abstract: A motor-driven hydraulic pump for use in motor vehicles and a driving coupler used therein, in which the pump includes a driving gear and a follower gear, an intake chamber and an outlet chamber formed on opposite sides of the meshed gears, a housing for enclosing the intake chamber and the outlet chamber, the housing being supported by a first support on one side and a second support on the other side, and a noise damper including a space inside for reducing noise occurring during the delivery of a working oil, the noise damper communicating with the outlet chamber and being fixed to the second support of the housing, and wherein the driving coupler includes a protruding, undulated sleeve including a mortise mating with a tenon formed on the end of either the driving shaft or the driven shaft, and a sleeve counterpart including a mortise mating with a tenon formed on the end of the other shaft, and a protruding, splined projection which includes splines shaped to fit into the undulated sleeve, with spaces be

Abstract: An apparatus comprises a reservoir (14) containing hydraulic fluid (68), a gear pump (16) with a suction hole (74), and a hydraulic muffler (18). The gear pump (16) has gears (78) with meshing teeth (80) that convey a flow of hydraulic fluid (68) from the reservoir (14) into the pump (16) through the suction hole (74). The muffler (18) attenuates noise by damping flow rate fluctuations that are caused by the meshing gear teeth (80). The muffler (18) includes a compliant element (92) and a fluid inertia structure (90) interposed between the suction hole (74) and the fluid (68) in the reservoir (14). The inertia structure (90) responds to the flow rate fluctuations by directing corresponding hydraulic pressure fluctuations to deflect the compliant element (92). As a result, noise is attenuated upon deflection of the compliant element (92).

Abstract: A Roots blower includes a casing having an inlet port and an outlet port, and a pair of multi-lobed rotors mounted for rotation in the casing. The rotors are rotated in such a manner that communication between the inlet and outlet ports is cut off, so that air is drawn in through the inlet port and the drawn air is discharged through the outlet port without being compressed. Two sets of zigzag meandering grooves are formed on an inner peripheral wall surface of the casing.

Abstract: The invention concerns a scroll compressor which is low in noise caused by water hammering of a refrigerant gas just after a discharge valve is closed. The scroll compressor includes a discharge member (45) having a discharge port (8) opposed to a discharge port (5) of a fixed scroll (2) and a discharge valve (9) opposed to the discharge port (8) of the discharge member (45) and opened/closed depending on a difference between flow passage pressure of a refrigerant gas and pressure in a high pressure space (27) in a sealed vessel (1). At least either of the fixed scroll (2) and the discharge member (45) is formed with a muffler chamber communicated with the discharge port (5, 8) and having a diameter larger than a diameter of the discharge port (5) of the fixed scroll (2) for suppressing occurrence of an impulse wave caused by water hammering when the discharge valve (9) is closed. Noise caused by a pressure ripple of the discharge port lessens, quieting the operation of the scroll compressor.

Abstract: A hermetic compressor which compresses compressed gas, comprising a sealing container, a compression mechanism, contained within said sealing container, for compressing said compressed gas, said compression mechanism including a rotary shaft, a motor for actuating the compression mechanism by driving the rotary shaft, first and second bearings, arranged individually on both sides of the compression mechanism, for journaling said rotary shaft, and a frame for fixedly supporting the compression mechanism, the frame comprises a frame body having a hollow portion in which said first bearing is situated, said frame body being fixed on one end surface of the compression mechanism and a bearing support portion for sealing the hollow portion of the frame body and supporting an outer peripheral portion of the first bearing.

Abstract: A compact electro-hydraulic unit in which an electric motor drives an hydraulic pump having pinions and a pump body, with a cavity containing the pinions, the pump body comprising sound wave absorbing cavities surrounding at least partially the cavity containing the pinions. Some at least of the cavities communicate, by means of a side surface of the pump body, with a chamber of a cover leading to a fitting of a utilization circuit and with an outlet of the cavity containing the pinions, the cavities being supplied with a hydraulic fluid under high pressure.

Abstract: The invention concerns a scroll compressor which is low in noise caused by water hammering of a refrigerant gas just after a discharge valve is closed. The scroll compressor includes a discharge member (45) having a discharge port (8) opposed to a discharge port (5) of a fixed scroll (2) and a discharge valve (9) opposed to the discharge port (8) of the discharge member (45) and opened/closed depending on a difference between flow passage pressure of a refrigerant gas and pressure in a high pressure space (27) in a sealed vessel (1). At least either of the fixed scroll (2) and the discharge member (45) is formed with a muffler chamber communicated with the discharge port (5, 8) and having a diameter larger than a diameter of the discharge port (5) of the fixed scroll (2) for suppressing occurrence of an impulse wave caused by water hammering when the discharge valve (9) is closed. Noise caused by a pressure ripple of the discharge port lessens, quieting the operation of the scroll compressor.

Abstract: A heat shield is disposed in a hermetic compressor between a discharge port and a local area on an interior surface of the outer shell toward which relatively hot compressed gas is directed. The local area of the outer shell is thereby insulated from the high temperature of the discharge gas.

Abstract: A scroll machine has a muffler which is located between a discharge port located in the scroll assembly and a discharge chamber located in a hermetic shell. The muffler has a top cap which is attached to a partition which defines the discharge chamber. A muffler is attached to the top cap and extends towards the scroll assembly through an opening in the partition. The muffler has a generally cylindrical body with two end caps having a spherical surface. The cylindrical body and the end caps define a plurality of perforations which comprise a specific percentage of the total area of these components.

Abstract: A rotator includes an axle and an associated rotor component having lamellar vanes. A case component surrounds the rotor component. Chambers arranged symmetrically in relation to the axle are disposed between the lamellar vanes. These chambers are pressurized by oil fed through feed and outlet openings connected to the chambers. Bearing members are arranged in an axial direction on both sides of the rotor component. A conical bearing carries the axial rotor load and is formed by a conical arrangement of juxtaposed surfaces defined by the case and axle. The case includes channels leading from the chambers to the conical surfaces for communicating pressurized oil thereamong. The conical arrangement includes spaced gaskets. Oil pressure applied between the conical surfaces raises the axle off the case. In the absence of oil pressure, the conical surfaces lock as a result of friction between the case and axle.

Abstract: A heat shield is disposed in a hermetic compressor between a discharge port and a local area on an interior surface of the outer shell toward which relatively hot compressed gas is directed. The local area of the outer shell is thereby insulated from the high temperature of the discharge gas and the noise and vibrations that are often associated with hot gas impinging on the shell.

Abstract: A moderately high pressure, sliding vane pump is fabricated from low modulus plastic by routing high pressure fluid away from the central pump perimeter and into a bearing gland chamber for discharge porting. Port fittings are push socket connections that are sealed by O-rings and held in place against fluid pressure ejection by a saddle plate that cross-pins to the port boss.

Abstract: Compressor bodies, an accelerator and a main motor are disposed on a base, while an innercooler, an aftercooler an oil cooler and a coolant cooler are disposed perpendicular to the axial direction of the motor so that the directions, in which the tube nests of the gas coolers are drawn out, are made to be the same. A control panel having a maintenance display is mounted on a front panel composed of panel portions which are mounted pivotally around respective remote or opposite side ends. Portions to be inspected daily are disposed near the front panel and one side panel adjacent thereto.

Abstract: A scroll compressor has a one-way drive for resisting and impeding objectionable reverse movement of the orbiting scroll member. The one-way drive includes a one-way clutch interconnecting a drive shaft with a stationary member of the compressor through a resilient member. Reverse rotation of the drive shaft causes a loading of the resilient member which then operates to cushion the stopping of the reverse rotation of the drive shaft. The one-way drive is inoperative during forward rotation of the drive shaft thus allowing normal operation of the compressor.

Abstract: A hydraulically driven rotary vibrator that includes a motor body and a pair of opposed housings. Each housing includes a shaft, and an eccentric weight that are journalled by a pair of anti-friction bearings. The shaft of each housing extends a selected distance beyond a first end of the housing. A gear is attached to the extending end of the shaft. The gears associated with each of the housings are aligned and meshed with each other interior of the motor plate. The gears and their associated shafts are rotated when a hydraulic fluid is introduced into a motor chamber formed in the motor plate. The eccentric weights may be selectively phased for producing a determined vibratory output.

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 heat shield is disposed in a hermetic compressor between a discharge port and a local area on an interior surface of the outer shell toward which relatively hot compressed gas is directed. The local area of the outer shell is thereby insulated from the high temperature of the discharge gas.

Abstract: A pump having a housing with an integral fluid reservoir and flexible end plates to permit the pump to be run dry for an extended period of time. A pair of reservoirs are provided, one each side of a pumping chamber. These reservoirs are in fluid communication with the pumping chamber via openings provided through the end plates of the pumping chamber and slots in the impeller hub. When the pump is run dry, fluid stored in these reservoirs is permitted to be released into the pumping chamber to provide a lubrication between the impeller and the chamber walls, thus reducing friction. The chamber end plates are thin and flexible. These end plates can bow outwardly due to the impeller expanding from increased heat when the pump is run dry, and thus reduce friction with the impeller. Accordingly, the pump can be run dry for an extended period of time without damaging or destroying the pump impeller.

Abstract: A low noise compressor is realized, involving a port and manifold assembly, and in which a reactive silencer means is formed integrally within the assembly and coupled acoustically with at least one of the input and output manifolds, the silencer including a pair of resonant cavities configured so as to attenuate at least the first overtone of the fundamental frequency.

Abstract: A heat shield is disposed in a hermetic compressor between a discharge port and a local area on an interior surface of the outer shell toward which relatively hot compressed gas is directed. The local area of the outer shell is thereby insulated from the high temperature of the discharge gas.

Abstract: A scroll compressor has a fluid brake for resisting and impeding objectionable reverse movement of the orbiting scroll member. The brake includes a one-way clutch interconnecting a drive shaft and a paddle disposed in the compressor oil sump, and optionally a rotor shield for controlling oil flow around the lower end of the motor rotor. A two piece paddle has a rotatable paddle having blades to impart angular momentum to the lubricating oil and a stationary housing having vanes to resist the angular momentum imparted to the lubricating oil by the blades of the rotatable housing.

Abstract: An apparatus for reducing the pressure pulse amplitudes in the discharge piping of a screw compressor. A stub pipe is added to the compressor discharge piping. By tuning the stub pipe dimensions, the reflected pulse from the stub pipe is combined with the reflected pulse from the discharge piping so that the pulse arriving back at the discharge of the compressor is out of phase with the compressor discharge pulse, reducing the pulse amplitude in the pipe.

Abstract: In a piezoelectric valve the actual control member (7) is formed by a displacer fluid motor (9) though which the fluid stream (5) flows. A piezoelectric actuating element (8) is disposed in the region of a displacer element (1), which can be moved by the fluid stream (5) and belongs to this fluid motor (9), and acts exploiting the inverse piezo effect during electric actuation to at least indirectly block or release this displacer element (1). The fluid motor (9) is formed preferably by a rotating piston machine, such as a gear pump.

Abstract: A machine of the fluid entrainment or the positive displacement type, such as a compressor or a vacuum pump, in which injection of dry gas is effected in the discharge region of said machine or of one of its stages, wherein said injection is effected in a distributed manner over a surface.

Abstract: A vane pump includes a pump housing formed with a cylindrical inner space, intake ports and exhaust ports, a rotating shaft rotatably supported by the pump housing, a rotor received in the cylindrical inner space to be rotated by the rotating shaft, a cam ring disposed in the cylindrical inner space, a plurality of vanes held by the rotor to define plural pump chambers between the rotor and cam ring. Fluid sucked from the intake ports is pressurized and discharged to the exhaust ports. The vane pump is further provided with first and second pressure chambers and a throttle passage connecting the first and second pressure chambers. Pressurized fluid discharged from one of the exhaust ports is led to one of the two pressure chambers and pressurized fluid discharged form the other of the exhaust ports is led to the other of the pressure chambers while pressurized fluid is taken out from the second pressure chamber to be supplied to a fluid device.

Abstract: A noise-absorbing medium is provided as an insert within the inner volume of the outlet chamber of a displacement-type pump. In an axial-flow displacement pump, this is the chamber into which pumped hydraulic fluid is discharged, for side-ported delivery to piping which serves the end-use actuator or other use component of the involved hydraulic system. The noise-absorbing medium is a preformed body (or bodies) of foamed elastomeric material having a sealed external skin and containing tiny closed cells of entrapped gas at low pressure; the encapsulated gas within the body bears a predetermined fractional volumetric proportion to the overall volume of the body, and the overall volume of the body also bears a predetermined relation to the overall volume of the outlet chamber.

Abstract: A circular piston engine or machine is provided having a rotor with outer teeth and fixedly connected for rotation with the shaft. The rotor cooperates with an outer gear having inner teeth. The outer gear is supported by the housing at its outside and the user ports extend axially in the control housing.

Abstract: A multistage vacuum pump including a plural set of two lobe type vacuum pumps arranged on a common shaft for rotors and in a common casing. The adjacent pumps are connected in series with each other through a communicating passage formed in a pump casing. A solid material collector having a cooling device is provided in the communicating passage so that it is dismountable from the pump casing. A solid component in a compressed gas is forcibly produced by and adhered to the solid material collector. Thus, it is not necessary to disassemble the pump casing for cleaning the same.

Abstract: A progressive cavity drilling motor is disclosed with a multiplicity of helically formed conduits positioned in a resilient stator. The conduits are placed between an inner wall of a motor casing and a helically formed through hole formed by the stator. The conduits are located in parallel with each of the semi circular lobes thereby reducing the thickness of the elastomer in the lobe area resulting in a reduction of the hysteresis in the elastomer that is caused by cyclic stress reversals of the stator during motor operation. The conduits additionally divert a portion of the drilling fluid through the stator conducting heat therefrom. In addition, one or more of the conduits may be utilized as a communication channel therethrough for measurement while drilling capabilities.

Abstract: A helical gear pump in which a tubular shroud surrounds the drive shaft, the shroud being mounted in a housing of the pump at the end of the shroud remote from the stator and rotor, a seal being provided between the rotor and the tubular shroud.

Abstract: A screw rotor machine which incorporates a sound silencing device in the vicinity of the inlet and/or outlet port. The sound silencing device comprises a De Laval nozzle (8) having a valve body (9) which is movable axially in relation to the nozzle. When the machine is shut-down, the valve body (9) lies sealingly against the opening (8A) of the nozzle. When increasing the capacity of the machine to full load, the valve body (9) moves in the opening direction under the influence of a damping force and against the action of a substantially constant spring force (14), so as to maintain a flow rate immediately beneath the sound of speed in the smallest area (8A) of the nozzle (8).

Abstract: A gear metering pump for delivering precise amounts of a compounded elastomeric material into a die. The gear pump has a housing formed with a hollow interior chamber containing a pair of rotating meshing gears mounted on shafts, one of which is power driven, for passing controlled quantities of the compounded material out of the chamber and into the die. A side plate is removably mounted on the housing and encloses an open side of the chamber and is moved between open and closed positions by fluid pressure cylinders mounted on the housing to provide ready access into the chamber for cleanout. A first bearing assembly for the gear shafts is mounted on the removable side plate and retains the gears mounted thereon for removing the gears from within the chamber along with the side plate.

Abstract: The invention relates to a rotary screw compressor with liquid-injection means. The axes of the rotors (18, 20) are in a horizontal plane and the inlet channel (26) reaches the compressor from below. According to the invention there are provided means for preventing that liquid leaking out from the working space of the compressor through the inlet port (46) reaches the inlet channel (26). These means include partition walls (34, 36) mounted in an inlet chamber (28) connecting the inlet channel (26) to the inlet port (46).

Abstract: A spinning pump (1) connected to a spinning pump block (2) by means of fastening screws (3) comprises a base plate (4) in contact with the connection face (11) of the spinning pump block (2), one or more gear plate (5), a cover plate (6), a drive shaft (7), an inlet channel (8) as well as outlet channels (9) for the spinning fluid, the channels (8, 9) are aligned with corresponding channels of the spinning pump block (2). The fastening screws (3) traverse through passage bores (12) an adapter part (15) connected with the cover plate (6) as well as plates (6,5,4) and are screwed into threaded bores (13) in the spinning pump block (2).

Abstract: A rotary hydraulic motor which comprises a brake which is adapted to be applied under the pressure of springs and to restrain the output shaft of the hydromotor when the hydromotor is not pressurized and which is arranged to a supply of hydraulic liquid under pressure to the hydraulic motor. In order to ensure that the hydraulic liquid can be withdrawn from the hydraulic cylinder in a simple manner when the motor has stopped so that the brake can subsequently be applied, the piston of the hydraulic cylinder is provided with an orifice plate or a throttle bore through which the hydraulic liquid can enter a chamber of the hydraulic motor.

Abstract: A sealed case has first and second housing portions. A motor section is arranged in the first housing portion of the sealed case and has a rotating shaft extending in the second housing portion. A compression mechanism section is arranged in the second housing portion of the sealed case and has first and second cylinders stacked on each other and first and second crank portions which are formed on the rotating shaft in the first and second cylinders, respectively. An accumulator is arranged outside the sealed case so as to substantially oppose an arrangement position of the motor section. A first suction pipe connects the accumulator to the first cylinder of the compression mechanism section. A second suction pipe is arranged outwardly from the first suction pipe so as to connect the accumulator to the second cylinder of the compression mechanism section.

Abstract: Improvements are disclosed in a rotary, lobar, positive-displacement pump and in a rotary, centrifugal pump, whereby all product-contacting areas of the pumps can be effectively cleaned without disassembly, i.e., cleaned in place. Non-rotating seals seal the impellers and isolate the pump shafts from the product zone. Each seal has an elastomeric member molded integrally thereto. The seal is biased by the elastomeric member so as to be slidably pressed against an impeller. In the lobar pump, certain passageways can be selectively closed and opened, so as to adapt the pump for being used to pump a pumpable material when closed and for being cleaned by a cleaning solution flowing therethrough when opened. Valves may be alternatively provided for analogous purposes.

Abstract: A scroll compressor for use in compressing gases includes a stationary scroll member having a top surface, a movable scroll member orbiting about the stationary scroll member for compressing gases together with the stationary scroll member as it orbits about the stationary scroll member, a muffler cavity formed in the stationary scroll member to increase the size of a muffler space in the scroll compressor, a discharge port formed in the center of the stationary scroll member for discharging the compressed gases, a release port formed in an offset position from the center of the stationary scroll member, a release cavity formed in the stationary scroll member and in communication with the released port, release guide passage passing through the stationary scroll member in parallel with the top surface of the stationary scroll member in communication with the release cavity, a sealed case for housing the stationary scroll member and the movable scroll member and a release pipe connected to the release guide pa

Abstract: A compressor includes at least one compression space for compressing refrigerant, at least one communication chamber into which the refrigerant is discharged from the compression space, a discharge pressure chamber, and at least one communications passage communicating the communication chamber with the discharge pressure chamber for feeding the refrigerant from the communication chamber into the discharge pressure chamber. The length of the passage is longer than the diameter of the passage.

Abstract: A scroll-type compressor includes a hermetic case in which a compression section having a pair of spiral scrolls and a motor section for driving the compression section are arranged. The motor section has a rotating shaft coupled to the compression section. A flow passage is formed in the shaft and communicates at its one end with the compression chamber of the compression section and at its other end with a muffler chamber defined above the motor section. An operating fluid compressed in the compression chamber is guided into the muffler chamber through the flow passage, flows around the motor section, and then is discharged from the case.

Abstract: A compressor in which the portion of the suction tube within the housing is rectilinear with a constant diameter and has an internal or external insulating tube, the suction tube being arranged through a positioning socket which is attached to the front cover of the compressor housing and extends inside and outside the housing with the positioning socket outer end being welded around the suction tube at a point away from the housing front cover and from the insulating tube inlet end within the compressor housing.

Abstract: The scroll gas compressor of the invention is so constructed that an enclosed container is partitioned by a fixed scroll member into a high pressure chamber and a low pressure chamber for gas-liquid separating intake refrigerant and storing it, the low pressure chamber being disposed at the lower portion and the high pressure chamber at the upper portion of enclosed container, the high pressure chamber disposing therein a drive unit related to a scroll compression mechanism and a lubricating oil sump, and the fixed scroll member serving also as part of the bottom of the lubricating oil sump, thereby providing that is small-sized, wide in an operational speed range, and superior in durability, and that prevents absorption of heat and noise propagation from the low pressure chamber serving as both the gas-liquid separation chamber and the reservoir of fluid, thereby improving the compression efficiency and lowering noise.

Abstract: A system to dampen high frequency noises in hermetic rotary compressors of the rolling piston type, usually employed in small refrigeration and air conditioning compressors without causing an increase in the cylinder dead volume, and, accordingly, a decrease in the compressor volumetric performance. A resonating chamber is provided in the cylinder or bearing and communication between the compression chamber to the resonator chamber is provided by the vane which rides on the rotating piston as it tilts toward and away from the resonating chamber or passage leading to the chamber.