Abstract: An improved method of blind riveting and an improved blind rivet have been described. The blind rivet of the present invention includes an interference fit shank portion which ensures adequate hole-fill and produces work hardening in a work piece. The blind rivet of the present invention also produces a drawing effect, reducing the force necessary to securely seat the rivet in a hole.

Abstract: A product and method for preventing a connector from rotating when a mating connector is attached to, or detached from, the connector. When a nut on the connector is tightened, a washer is compressed in a groove in a panel to which the connector is attached. Edges on the outer perimeter of the washer press against the edges of the groove, thus preventing the washer from rotating in relation to the panel having the connector. A portion of the washer's cutout presses against flat regions on the connector and, in conjunction with the groove in the panel, prevent the connector from rotating when attaching or detaching cables.

Abstract: The thread insert of the present invention comprises a helical body having a front end portion (3) and a back end portion (6), and a detachable tongue (4) connected to the front end portion (3) of the helical body, and a pair of engaging notches (10) are formed in the back end portion (6). A female thread (2) is formed on an inner surface of the helical body, a male thread (1) is formed on an outer surface of the helical body. The detachable tongue (4) has a circular portion (3a) having an outer diameter which is smaller than that of the helical body. A cutting notch (11) is formed between the front end portion (3) and the circular portion (3a) on at least one of a surface facing backward and a inner surface of the helical body.

Abstract: An article of manufacture in the form of a screw retaining mechanism for assembling a pair of objects. The mechanism comprises a tubular wall of given thickness defining a plastic boss on one object; a screw having a threaded shank secured in the boss by grooves complementary to the screw threads, the screw having a head clamping the other object to the first object; and a heat shrunk sheath residing on the screw threads and shank to act as a threaded interference fit film between the screw threads and the boss grooves, the sheath having metal wires weavingly embedded into the sheath to extend at least generally parallel to the axis of the tubular wall.

Abstract: As formed from a predetermined length of carbon steel wire, such as AISI C 1062 steel wire or high-manganese carbon steel wire, in sequential forming, rolling, and austempering steps, a pin for axial, non-rotational penetration into a steel, concrete, or masonry substrate has a head, a tapered shank, a point having a tip, and a transition zone between the tapered shank and the head. The head has an outer diameter at least about 2.6 times greater than the initial diameter of the predetermined length wire. The smaller end of the tapered shank has a diameter about 0.6 times the initial diameter thereof. The larger end of the tapered shank has a diameter about 0.7 times the initial diameter thereof. The point is joined unitarily to the smaller end of the tapered shank and conforms exept at the tip, which is rounded, substantially to a tangent ogive, which is tangent to the tapered shank.

Abstract: A corner jack connector having integral prongs is provided. The corner jack connector is formed of a substantially planar piece of rigid material, preferably steel, and is configured so as to allow joining of wooden work pieces at various angles to one another as will be readily understood by those skilled in the art. The corner jack connector includes a central portion and first and second extensions disposed in spaced relation from each other and integral with the central portion. The skewable corner jack connector includes a plurality of integral prongs for securing the corner jack connector to the work pieces. In order to facilitate skewing of the corner jack connector, a plurality of hole members, which are preferably elliptical, are disposed along fold regions at the junction between the central portion and each of the extensions. In the preferred embodiment, the extensions are disposed at a right angle to each other.

Abstract: A binding system in an output system having a plurality of discrete functional modules is disclosed. The output system includes an accumulator module in which sheet material is accumulated in respective jobs to be bound. The binding system includes a cover feed module adapted and constructed to input one of a plurality of different covers into the output system. The binding system further includes a binding module connected to the cover feed module and to the accumulator module. The binding module is adapted to receive a cover from the cover feed module and a job to be bound from the accumulator module, and to place the job to be bound inside the received cover in a desired registration, and to bind the materials within the cover. The cover feed module can include a cover selection mechanism with a measuring arrangement to determine at least one size parameter of the job to be bound.

Abstract: A device for the mechanical pressing of rounded book blocks held clamped in the region near the back is presented. The device includes a molding tool, which acts upon the book block back with a pressing force. A carriage is provided which receives the molding tool and is pivotable onto alternate sides of the book block back via a drive disposed on curved tracks in oppositely arranged, vertically displaceable bearings. The traveled radius of the active surface of the molding tool is smaller than the radius of the book block back and a tangential tensile/thrust component acting upon the lateral regions of the book block back in order to bend the printed sheets over is imparted thereon. A drive for lowering the molding tool onto the book block back and for raising the molding tool for the return stroke into the central position is provided in order to optimize the pressing process and to reduce the structural outlay and to reduce the setup time.

Abstract: Apparatus for retrieving and stacking bales includes bale engagement and transport mechanism to individually transport bales engaged by the apparatus from the ground to a location on a support platform. A bale displacement member repositions the bale on the support platform to allow room for a subsequent bale. The apparatus includes mechanical linkage of a specific character which includes two link members relatively pivotally movable during a portion of the bale placement procedure and locked together during another portion of the procedure.

Abstract: A bale loading apparatus, which includes a wheeled undercarriage having front and rear ends; a deck pivotally mounted by a pivot mount to the rear end of the undercarriage for supporting a row of bales thereon; and actuating component driven by a first drive to pivot said deck between a first generally horizontal position and a second generally vertical position. The apparatus also includes forks mounted to the rear of the deck, with the forks preferably composed of tines. The forks are positionable at substantially ground level and in a generally horizontal orientation when the deck is generally vertical. A conveyor is incorporated within the deck to convey a bale from the rear end of the deck to the front end thereof. A drive component is provided to drive the conveyor.

Abstract: A cart which is provided with lifting jacks (26) and wheels on casters (28) providing a means of vertically lifting and transporting a fire suppression agent storage container in an upright position. The apparatus is designed to lift from the base of the container without requiring a lifting element to be placed beneath said fire suppression agent storage container. The base of the container is coupled to the apparatus by the use of clamping frames (24). Once the clamping frames (24) are fully engaged around the container base, the lifting jacks (26) can be operated to lift the container. Once the container is lifted, the container can then be easily moved by rolling entire apparatus along a surface by way of the wheels on casters (28).

Abstract: Workpieces such as chips are removed from a receiving plane by a transfer unit, which carries them to a delivery plane. The workpieces are transported in two segments during two phases, each workpiece being deposited between the phases on an intermediate station arranged in the region of the feed path. The transfer unit has two working heads, which simultaneously transport one workpiece from the receiving plane to the intermediate station, and another workpiece from the intermediate station to the delivery plane. The workpiece can be pivoted or rotated at the intermediate station so that its lower surface can be grasped by the depositing head.

Abstract: A mobile loading machine having a frame and an operator's cab mounted thereon has a load arm assembly adapted to be pivotably mounted at a rear end of the frame, and support a power tool between a lowered position and a raised position at a forward end thereof. The load arm assembly includes an outer load arm section for supporting the tool, an inner load arm section pivotably mounted to the frame independent of the cab, and an intermediate load arm section integrally connected between the outer and inner load arm sections. The intermediate load arm section and inner load arm section are in overlapping relationship with each other such that the intermediate load arm section is positioned alongside a lowermost portion of the cab when the load arm assembly is in the lowered position to maximize the lateral visibility of the operator from the cab.

Abstract: An apparatus for separating a stack of documents, such as, for instance, a stack of magazines, into individual documents. The apparatus has a number of endless conveyors which are arranged behind each other, connect to each other, and together form a transport path. The transport path has a first path section and a second path section. In the first path section, the stack of documents is formed into a shuffled document stream, and in the second path section, the documents are separated from the shuffled document stream into individual documents. The invention further provides a method for separating a stack of documents, such as, for instance, a stack of magazines, into individual documents.

Abstract: The present invention pertains to the cooling of a honeycomb seal (2), which is arranged in a carrier ring (4), with vertical (2.2) and horizontal (2.1) honeycomb openings. To achieve this, the support ring (4) of the honeycomb seal (2) is provided with cooling air grooves (5) and tangentially arranged cooling holes (6), so that the cooling air (7) is fed homogeneously from the outer annular chamber (8) to the honeycomb seal (2) and can escape via the open honeycomb structure (2.2). Intense cooling action of the honeycomb seal (2), which is subject to high thermal stress, is generated as a result. Furthermore, corrosive process gas is kept extensively away from the honeycomb seal (2). At the same time, the sealing effect of the rotor blade labyrinth seal is improved by the cooling air flow (7) and the rotor blade leak flow (11) crossing each other or being directed in opposite directions.

Abstract: A device for thermally insulating casing parts of a steam turbine contains a shim element that can be inserted into a bearing region of supporting bearings of the casing parts. The supporting bearings face one another and the shim element has a number of holes formed therein.

Abstract: An impeller housing for a suction device with reduced noise and improved airflow. The impeller assembly comprises a shaft and a housing. The housing comprises a volute, a central axis, and an inlet port located along the central axis. An outlet port is located on a second axis spaced from the central axis. An exhaust passage extends from the outlet port. An impeller is mounted on the shaft for rotation. The impeller comprises a hub, and at least one blade extending from the hub. The blade has a distal surface spaced from the shaft. The impeller housing has a first plane which is approximately perpendicular to the central axis. The first plane contacts the blade distal surface. A second plane is parallel to and spaced apart from the first plane. The second plane contacts a wall of the outlet port at a location closest to the first plane. The exhaust passage can increase in diameter along its length. The outlet port can be of a circular cross-section.

Abstract: Method and apparatus for controlling an aircraft engine with a single, manually-operable lever includes structure and function for generating a pilot thrust command from the single lever. A processor is coupled to the single lever and (i) receives the generated pilot thrust command, (ii) receives a plurality of detected ambient air flight conditions, (iii) receives a plurality of detected engine performance parameters, (iv) determines first and second engine control commands based on the received pilot thrust command, the detected ambient air flight conditions, and the engine performance parameters, and (v) outputs first and second output signals respectively corresponding to the first and second engine control commands. Preferably, the engine control commands comprise propeller RPM and engine inlet manifold air pressure commands, and the detected ambient air flight conditions comprise air speed and altitude.

Abstract: A technique for providing a signal representative of blade vortex interaction (BVI) noise for a multi-blade rotorcraft. The fluid (air) pressure at one, two, or more predetermined locations on a rotor blade is measured during at least one predetermined azimuthal segment of blade rotation during operation to provide respective pressure measurements. The pressure measurements are processed to provide a signal for use as a control variable in a control system for the active control of BVI noise. The pressure measurements are made within 10% blade chord length of the blade leading edge and preferably two or more are made between 65% and 95% of blade radial-length. The pressure measurements are filtered and the band of retained frequencies is between 20 and 48 times the rotor rotation frequency. An algorithm operative over a determined blade frequency range optimizes the signal for control use.

Abstract: A table electric fan comprising a stand, a protective net, a blade set fixed on a spindle of a motor, a speed reducer connected to the motor, a plate pivotally connected to the shaft of the speed reducer and further pivotally connected to a bottom base of a position frame having two pairs of vertical posts standing on the bottom base. The upper ends of all the posts are fixed with the protective net. A ring is pivotally connected with one pair of the vertical opposite posts and further pivotally connected with the motor at two opposite points. Then the blade set may sway for 360° within the protective net by means of pivotal connection of the motor with the ring and pivotal connection of the position frame with the ring.

Abstract: A turbine blade damper in the form of a sheet metal body includes a concave notch along one edge thereof, and a projecting side tab along an opposite edge thereof.

Abstract: Easy to attach and detach blades for overhead ceiling fans. A first version has a ceiling fan blade with keyhole slots that fit over flat topped fasteners on a mounting arm. Pulling the blade away from the arm locks the slots to the fasteners. A second version is similar to the first and has a decorative bottom cover having snappable tapered protrusions which attach through the keyholes and into mateable through-holes in the mounting arm connection. The third version has a protruding end portion of the blade that fits into a slot in the mounting arm where spring loaded pistons press into grooves in the protrusion end portion of the blade. Latching handles allow users to manually move the pistons. A fourth version has a slot in the blade which fits about a mateable housing in the mounting arm where opposing spring loaded pistons press into interior wall grooves in the slot of the blade.

Abstract: A ceiling fan has a downrod assembly secured at an upper end to a ceiling bracket assembly and secured at a lower end to the motor shaft of a motor. An upper canopy is disposed at an upper end of the downrod assembly and a lower canopy is disposed at the lower end of the downrod assembly. A fan housing/blade mounting assembly secures fan blades to a motor body that rotates about the motor shaft, and a lower platter assembly is secured to a lower end of the motor shaft.

Abstract: A suspending bracket for ceiling fans includes a U-shaped upper member having a C-shaped base and two upright arms at two opposite sides of the C-shaped base, each of the upright arms being provided with an outwardly extending sectorial flange which is formed with a radial slot and a raised portion on the top, the sectorial flange having a corner formed with a blind hole in which is fitted a spring and a steel ball so that a top of the steel ball protrudes upwardly out of the blind hole, and an inverted conical lower member formed with two inwardly extending lugs at two opposite upper edges thereof and a through hole at a center thereof, each of the lugs having a hole adapted to engage with a top of the steel ball.

Abstract: A fitting includes a mounting bracket to be fixed on a ceiling wall, and with two side edge portions opposite to each other to define an uppermost abutment plane. Two mounting walls extend downwards from the side edge portions, and have positioning walls axially spaced apart from the plane. An anchoring seat is disposed on one of the mounting walls immediately upstream of the positioning wall in a clockwise or counterclockwise direction, and is spaced apart from the plane with a width larger than that between the positioning wall and the plane. A protective covering member includes an upper annular secured portion, an anchored portion extending from the secured portion radially, inwardly and downwardly so as to engage the anchoring seat for suspending the covering member from the mounting bracket in a non-fastened state, and a supported portion extending from the secured portion radially and inwardly.

Abstract: A control circuit for vibrating compressors for converting d-c voltage into a-c voltage to supply a-c voltage to a vibrating compressor (1) comprising a MOS-FET transistor (2) for driving the vibrating compressor (1), a timer IC for generating pulses to switch the MOS-FET transistor (2), a timer forced operation circuit for forcibly reversing the output of the timer IC at a timing at which a counter-electromotive voltage generated by the vibrating compressor (1) during the OFF period of the MOS-FET transistor (2) is restored in the vicinity of 0 volts, a driver for driving the MOS-FET transistor (2) based on the output of the timer IC, and a pulse width changing circuit (9) for detecting an input voltage input into the vibrating compressor (1) and lowering the input voltage to the vibrating compressor (1) by changing the pulse width of output pulses of the timer IC when the input voltage is higher than a predetermined voltage.

Abstract: A scroll compressor is provided with a reverse rotation detection circuit that monitors the temperature adjacent the suction tube. An elevated temperature at the suction tube is indicative of reverse rotation, and if the temperature exceeds a predetermined maximum, then a determination is made that reverse rotation is occurring. Once this determination is made, the rotation of the motor is stopped, or corrected.

Abstract: A method for controlling or regulating a compressor 4 that can be switched on and off on demand, wherein a control unit 6 that switches the compressor 4 on and off is provided with the compressor. In a method of this type, it must be ensured that the compressor 4 is not damaged due to overheating. This is attained due to the fact that the control unit 6 operates the compressor 4 continuously during a regulating process until a limiting value is reached, and that said control unit operates the compressor in a cyclic manner once the limiting value is reached. This method makes it possible to complete regulating processes even if a critical limiting value is already reached.

Abstract: When a steplike reference signal is supplied while a switch is open, an offset signal for compensating for the dead time of a pneumatic device is generated by an offset generator and supplied as a manipulated variable for the pneumatic device. When a feedback increases in level and a speed higher than a reference speed is detected by a speed detector, the switch is closed by a switching signal, switching from a PD control mode to a PID control mode. The pneumatic device thus controlled has a reduced response time and can made a quick response.

Abstract: The present invention generally provides a micropump that utilizes electroosmotic pumping of fluid in one channel or region to generate a pressure based flow of material in a connected channel, where the connected channel has substantially no electroosmotic flow generated. Such pumps have a variety of applications, and are particularly useful in those situations where the application for which the pump is to be used prohibits the application of electric fields to the channel in which fluid flow is desired, or where pressure based flow is particularly desirable.

Abstract: A hybrid vacuum pump comprising an ejector type compressed air-operated vacuum pump. Such pump comprises a housing having an inlet for compressed air, a second inlet connectable to the enclosure to be evacuated, and a discharge outlet. The incoming compressed air being divided into at least two parallel streams by a multiple-outlet chamber, each stream of compressed air passing through at least two nozzles arranged in series, intermediate chambers between successive nozzles of each parallel stream being provided separately for each stream. Pressure-operated valves being provided to automatically prevent flow of gas being evacuated to some of said nozzles as progress is made in producing the desired vacuum, and thus to increase air flow in the remaining nozzles for the achievement of a high vacuum. The pump being characterized by the use of a single body structure being used to support multiple nozzles having different forms.

Abstract: A refrigeration unit having a jet pump with an automatically adjustable cross-section for the control of refrigerant flow that provides a more economical refrigeration process. The circulation of thermotransfering materials, such as a refrigerant, through the jet pump's evaporator facilitates a more efficient cooling effect.

Abstract: A high-pressure reciprocating pump is constructed such that a plurality of plungers connected to a driver are made to move back and forth and intake channels or discharge channels are opened and closed by valves in synchronism with movements of the plungers for transferring a fluid under high pressure.

Abstract: A water pump includes a housing having a water inlet, a water outlet, an exit and a mouth. A circulating water passage couples the exit to the mouth of the housing. A pump may pump water from the exit to the mouth of the housing via the circulating water passage. The housing includes two ducts communicating with each other and communicating with the mouth, and the water inlet and the water outlet respectively. Two plugs are slidably disposed in the ducts for switching water to circulate through the exit and the circulating water passage when the water outlet is closed.

Abstract: A combination electric motor driven vacuum pump and air compressor unit, particularly adapted to use in medical procedures, is mounted in an insulated cabinet arranged to provide for drawing cooling air into the cabinet through an inlet duct, cause cooling air to flow over an aftercooler part of a compressed air discharge conduit to aftercool compressed air, and cause cooling air to flow through the pump/compressor unit and be discharged from the cabinet. A pressure air receiver tank is mounted in the cabinet and is operably connected to a condensate receiver and a control valve for discharging condensate to an evaporator container connected to the aftercooler conduit part to evaporate condensate. A control circuit includes solenoid actuated valves for controlling vacuum produced by the pump/compressor unit and actuation of a flexible tube clamp mechanism for cutting off vacuum from a vacuum device, such as a cannula, during certain phases of a liposuction medical procedure, for example.

Abstract: A safety device for use in a fluid transfer and/or circulation system of the type which uses a pump to draw water from a reservoir through one or more intake lines each extending from an open end at the reservoir to the pump intake. The safety device connects in-line with the fluid transfer/circulation system, between the open ends of the intake lines and the pump and includes a vacuum pressure sensor, an analyzer and controller, a relay, and a vacuum breaker. Each time the pump is activated, the device analyzes negative pressure levels throughout a start-up period to establish a normal operating pressure window for the particular system.

Abstract: A compression-pumping system for a multiphase fluid (GLR) includes a compression section, a pumping section, a shaft and a separator. The compression section is sealed off from the pumping section, and the pumping section and the compression section are included in the same enclosure and mounted on the same shaft. The compression-pumping system is associated with a liquid level control system situated at the level of the separator.

Abstract: The invention relates to a sequential control system for two-cylinder thick medium pumps whose delivery cylinders (1, 1′) are actuated hydraulically by two drive cylinders (5, 5′) in opposing cycles. A pipe shunt (3) is provided inside a material feed container and is connected at the inlet side alternatively to the apertures (2, 2′) of the delivery cylinders (1, 1′) and at the outlet side to a pump line (4). The drive cylinders (5, 5′) are each connected at one end to a different connection pint of a reversing pump (6) to form a closed hydraulic circuit (11, 11′) and at their outer ends via an oscillating oil line (12) hydraulically to one another. To effect switching of the pipe shunt (3), pressure oil is taken off directly from the hydraulic lines (11, 11′) leading from the reversing pump (6) to the drive cylinders (5, 5′).

Abstract: A hermetic compressor assembly having a housing and a pair of spaced apart main bearings, disposed within the housing, which subdivide the housing into first and second discharge chambers, and a suction chamber. The suction chamber is disposed between the pair of main bearings and first and second compressor mechanisms are disposed, respectively, in the discharge chambers. Each compressor mechanism has an outboard bearing, a cylinder block, which is disposed between the outboard and main bearings and defining a cylindrical cavity, a roller piston in the cylindrical cavity and a vane supported in the cylinder block and rotationally engaging the roller piston. At least one discharge opening is in fluid communication with the respective discharge chamber and a drive motor is disposed in the suction chamber. A drive shaft drivingly connects each roller piston to the motor. A suction port is disposed within at least one of the compressor mechanisms and extends through the respective main bearing.

Abstract: A hermetic compressor assembly and method of assembling a hermetic compressor. The assembly includes a housing, a compression mechanism, an electric motor in driving communication with the compression mechanism, a plurality of suspension spring supports, and a suspension spring for each. The motor and compression mechanism comprise a subassembly that is installed in the housing. The support has first and second portions and a border between the portions. The first support portion is attached to the housing. The second support portion has an arcuate opening at the border between the portions, such that the second portion can be bent inwardly at this border. The suspension spring extends between the support second portion and the subassembly.

Abstract: A centrifugal pump for delivering a fluid, especially for delivering blood, has a pump housing (2) that has an inlet (3) and an outlet (4) for the fluid, as well as an impeller (5) located inside pump housing (2), said impeller having a plurality of vanes (51) and being rotatable around a rotational axis (A), as well as means for driving impeller (5). Outlet (4) is located offset in the axial direction with respect to impeller (5).

Abstract: A drive unit for a radial blower has an electric motor including a driven shaft with a bearing for said driven shaft, and a motor housing provided with bearing pins which coaxially project at an end side of the motor housing and surrounds the bearing, a housing which receives the electric motor and has holders engaged in the bearing pins, at least one damping element composed of an elastic material and inserted between one of the bearing pins and one of the holders to radially and axially support the electric motor, the damping element being composed of a plurality of roller bodies having radially oriented body axes, the roller bodies being offset relative to one another and connected with one another with substantially constant distances there between.

Abstract: For an immersed pump having a suction port directly immersed in a liquid for operation, the present invention provides a pump that eliminates the need to seal a rotating shaft with a shaft sealing apparatus and that reduces the effect on individual pump sections of a) the thrust of the rotating shaft effected by the rotation of an impeller and b) the weight of a motor acting in the same direction, thereby preventing defects in the pump. To achieve this object, this invention provides an immersed pump configured in such a way that an impeller 7 is driven and rotated by a motor 2 to draw a liquid from a suction port 4A into a pump housing 3A and eject it from an ejection port 5. The suction port 4A is provided at the lower end of a body frame 1 or on the outer circumference of the upper end of the housing 3A, while the ejection port 5 is provided at the lower end of the housing 3A.

Abstract: A fuel pump assembly is capable of improving follow-up ability of a push rod relative to an eccentric cam by increasing a spring force of a push rod spring, without increasing a size of the fuel pump assembly. The fuel pump assembly comprises a lower pump body and an upper pump body. A pump diaphragm clamped between the lower pump body and the upper pump body defines a pump chamber and an operation chamber. A diaphragm rod is integrally mounted on the pump diaphragm and is slidably supported on the lower pump body. The push rod is supported for movement along a longitudinal direction of the diaphragm rod. The push rod is movably supported within a push rod guide hole opened downwardly in the lower pump body and has a lower end extended downwardly from the lower pump body. The push rod spring is disposed within the push rod guide hole in compressed fashion and is arranged on the outer periphery of the diaphragm rod.

Abstract: A peristaltic pumping mechanism is provided with a non-permeable peristaltic circuit comprising two strips of thin metal laser bonded at their edges to form a tube. In one embodiment, the non-permeable tubing takes the form of a continuous loop having input and output ports. In another embodiment, the tubing is open and generally U-shaped. In still another embodiment, a dual-tube circuit is provided, wherein a central, metal tube is disposed within an outer elastomeric tube having an inner diameter larger than the outer dimension of the metal tube. The elastomeric tube supports the metal tube only at the ends of the circuit, enabling the metal tube to “float” within the elastomeric tube.

Abstract: The invention relates to a piston pump with a piston, which is guided so that the piston can move axially in a liner that has been inserted into a pump housing and is driven into a reciprocating stroke motion by means of a cam that is driven to rotate. The invention uses a liner that is manufactured as an injection-molded plastic part. The plastic liner has advantages with regard to manufacture, damping behavior when there are pressure changes, and noise generation. Furthermore, the invention proposes affixing a filter integral with the liner when the liner is injection molded.

Abstract: A compressor assembly includes a shell which defines a discharge chamber. A discharge valve assembly is attached to the shell in communication with the discharge chamber. The discharge valve assembly includes a stamped or coined valve seat, a drawn tubular element and a stamped valve member. The stamping, drawing and coining operations used to manufacture the discharge valve assembly significantly reduce the manufacturing costs for the discharge valve assembly.

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.

Abstract: A scroll compressor is provided with a pressure equalization groove in the base of one of the scroll members. The pressure equalization groove communicates between the compression chambers at an intermediate pressure. Thus, should one of the two compression chambers be at higher pressure than the other, pressure is equalized. The invention eliminates mixing losses which would otherwise occur when two chambers of differing pressures communicate with each other or at discharge. Vibration and noise are also reduced.

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.