Abstract: A pressure responsive oil flow regulating supply valve assembly includes an oil supply input; an oil supply output; an oil flow path defined between the input and output. A valving mechanism located in the oil flow path includes a device for restricting oil flow at a first level in response to normal pressure and for restricting oil flow at a second level in response to high pressure conditions. In addition, other levels of restriction may be provided for other pressure conditions.

Abstract: An inlet valve for use in a gas compressor, the inlet valve including a piston movable within a housing chamber toward and away from a housing inlet and a valve disc movable with the piston, the valve disc including an aperture for selectively providing air flow from the housing inlet into the chamber, and a flexible member engageable with the valve disc to close the aperture. The inlet valve also includes a valve seat disposed near the housing inlet, and the piston is movable between a first position where the valve disc contacts the valve seat, and a second position where the valve disc is spaced from the valve seat. A spring biases the valve disc toward the valve seat.

Abstract: Two rotary vane pumps driven by a common drive shaft with each pump sharing a common intake. Each pump's rotor is connected to the drive shaft by shear means. A valve is utilized to seal off a failed pump, and to protect the operating pump from foreign objects created by the failed pump. If either rotary vane pump fails its shear means, the other pump continues to operate unaffected, and maintains nominal pump performance.

Abstract: The capacity of a high-pressure pump (6) is regulated by a valve system including a variable-capacity on-off valve (23) and an overpressure valve (31). The overpressure valve has a valve body (33) having a cylindrical wall (35) forming a cavity (34) in which slides a shutter (37) having a lateral wall (51) and an end wall (52). The shutter (37) is pushed into a closed position by a calibrated spring (58). The cylindrical wall (35) has first holes (44) for allowing the passage of enough fuel to lubricate the inside of the pump (6), and second holes (47) for supplying the pump (6) via a supply conduit (68) and for draining any surplus fuel into a recirculating conduit (32). The first holes (44) and the second holes (47) are opened by different displacements of the lateral wall (51) of the shutter (37); and the end wall (52) has a calibrated air vent hole (64).

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

Abstract: A flow regulator for a water pump, working in conjunction with a water pump, having a pump, an inlet pipe, an outlet pipe with a water pressure, and a container. The flow regulator comprises: a main body, installed at the inlet pipe and having a passageway for water flowing through the inlet pipe; a chamber inside the main body; an entrance to the chamber on the main body; a control element, mounted inside the chamber and glidingly movable therein back and forth; a connecting pipe, conducting the water pressure in the outlet pipe to the chamber; and a spring. The water pressure causes the control element to move within the chamber, resulting in the passageway to be narrowed. The spring counters the water pressure, such that when the water pressure decreases the passageway is widened. Thereby the water pressure controls the flow of water, according to demand, such that start-stop cycles of the water pump are lengthened.

Abstract: An impeller pump with thermostatically adjustable guide vanes is suitable for use as an automotive coolant pump. The pump is driven by a constant speed electric motor, and flow variation is controlled by varying the orientation of the vanes. Orientation of the vanes is effected by a wax-type thermostat, which senses coolant temperature: flow is increased when the coolant is hot, and decreased as the coolant cools. The variable guide vanes are mounted for pivoting about radial axes, and are located just upstream from the pump impeller.

Abstract: In a variable displacement compressor of a piston type, a valve body (34) is movably placed adjacent to a main channel (32) communicating a suction port (26) with a suction chamber (24). The valve body is for variably controlling an opening area of the main channel. An air damper (38) is coupled to the valve body to damp vibration of the valve body. In addition, a bypass channel (39) is formed outside of the air damper to communicate the suction port with the suction chamber.

Abstract: A compressor, especially for compressing the fuel gas for a gas turbine, is controlled by a throttling member (9) arranged on the intake side of the compressor as a function of the gas consumption of the user (7) such that the flow cross section is reduced during a reduction in gas consumption. The intake-side throttling member may be additionally controlled as a function of the pressure on the intake side of the compressor. Additional control circuits, especially an end pressure controller (19), which maintains the end pressure by acting on the guide vanes or on the speed of rotation of the compressor, and/or a pump surge limiter (33), which acts on a blow-by valve (29) connecting the outlet side to the intake side of the compressor (3), may be additionally present.

Abstract: To protect a turbocompressor (3) with a downstream process from operation in the unstable working range, a machine controller is used, which optionally contains—besides a surge limit controller (15)—an intake pressure controller (11), an end pressure controller (20) and a bypass controller (9). A control matrix is determined from the position of a control unit (fuel gas control valve 6) determining the flow to the process, optionally taking into account additional influencing variables such as the compressor intake pressure and the compressor discharge pressure.

Abstract: A flow regulator for a water pump, working in conjunction with a water pump, having a pump, an inlet pipe, an outlet pipe with a water pressure, and a container. The flow regulator comprises: a main body, installed at the inlet pipe and having a passageway for water flowing through the inlet pipe; a chamber inside the main body; an entrance on the main body, conducting the water pressure in the outlet pipe to the chamber; a control element, mounted inside the chamber and glidingly movable therein back and forth; a spring; and an adjustable cover, mounted on the main body and connected to the spring. The water pressure causes the control element to move within the chamber, resulting in the passageway to be narrowed. The spring counters the water pressure, such that when the water pressure decreases the passageway is widened. By varying the position of the adjustable cover, the elastic force of the spring is adjusted.

Abstract: A turbomolecular pump comprising a rotor and a stator housed in a casing and forming an exhaust channel therebetween, and a suction port and a discharge port formed in the casing; wherein the turbomolecular pump has a valve body for opening and closing the suction port, the valve body is movable in an axial direction of the turbomolecular pump, a valve driving mechanism for driving the valve body via a valve body supporting member which extends through a throughhole formed in the rotor and/or the stator and magnetic bearing units for non-contactingly supporting the valve body supporting member within the throughhole, whereby a turbomolecular pump having a compact overall construction including valve units can be provided.

Abstract: A suction-throttled pump, comprising at least one displacement body for the delivery of a medium and movable in a delivery chamber, into which opens at least one inflow channel extending between the delivery chamber and a suction chamber, and comprising a suction control valve, the pump being characterised in that the suction control valve (33; 33′; 33″) co-operates directly with the inflow channel (25; 25′) and is arranged at the end thereof facing the suction chamber (27).

Abstract: Mechanical complexity and high cost in a fluid flow control system are avoided through the use of a pulse width modulated (PWM) valve (20) to meter a fluid flow to an inlet (50) of a pump (16) that pumps the metered flow to an outlet (56) of the fuel pump (12). The system utilizes a pulsating vapor core in the pump (16) to dampen the pulses in the fluid flow generated by the PWM valve (20). A regulator valve (22) is provided to maintain a relatively constant pressure drop across the PWM valve (20). The control system is ideally suited for controlling the flow of fuel to a gas turbine engine.

Abstract: Continuously variable transmission having a hydraulically adjustable transmission ratio, includes a hydraulic circuit that interacts with a reservoir, at least two pumps for pumping hydraulic medium from the reservoir to an outflow channel and adjustor which act on the circuit, for switching the pumps in series or in parallel or is suitable for making and breaking hydraulic connections between an outlet opening of the first pump and an inlet opening of the second pump, between the outlet of the first pump and the outflow channel and between the inlet opening of the second pump and the reservoir and is at least provided with individual hydraulic elements for making and breaking a hydraulic connection between the outlet opening of the first pump and the inlet of the second pump and between the reservoir and the inlet opening of the second pump.

Abstract: A flow regulator for a water pump, working in conjunction with a water pump, having a pump, an inlet pipe, an outlet pipe with a water pressure, and a container. The flow regulator comprises: a main body, installed at the inlet pipe and having a passageway for water flowing through the inlet pipe; a chamber inside the main body; a connecting pipe, conducting the water pressure in the outlet pipe through an entrance on the main body to the chamber; and a control element, mounted inside the chamber and glidingly movable therein back and forth. The water pressure causes the control element to move within the chamber, adjusting the width of the passageway and controlling the flow of water through the water pump. This allows to extend start-stop cycles of the pump.

Abstract: A molecular drag pump comprising a rotor housed inside a case having a suction inlet and a delivery outlet, said pump being associated at its inlet with a valve comprising a valve mechanism inside a valve envelope, wherein the valve envelope is integral with said pump case.

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

Abstract: In the inlet pipe (7) of the compressor element (1) is provided a pneumatically controlled throttle valve (9), whereas the motor (3) of the compressor element (1) has a pneumatically controlled speed regulator (6). This speed regulator (6) and the throttle valve (9) are both connected to the compressed air receiver (14) via a compressed air pipe (26) and a control device (18). This control device (18) contains an electropneumatic valve (19) in the compressed air pipe (26) which is coupled to an electronic control (20), whereas a pressure sensor (21) is connected to the compressed air receiver (14) and a pressure sensor (22) is erected in the compressed air pipe (26) between the valve (19) and the speed regulator (6) and the throttle valve (9).

Abstract: The present invention relates to an eccentric-type vane pump and, in particular, to an eccentric-type vane pump being capable of generating minimum heat and noise due to frictional force produced from rotation of the vane pump. The vane pump comprises a rotor connected to a rotor shaft having vanes slidably received in vane grooves and recessed within a space in the periphery of the rotor for moving radially by rotation of the rotor. A cylinder ring is positioned eccentrically around the rotor and is rotated by the frictional force produced from abutting the front end of the vanes. A pump chamber is formed between the rotor and the cylinder ring. A cylinder body is provided having a bearing between the outer surface of the cylinder ring and the cylinder body. A front body is connected to a first end of the cylinder body. One end of a rotor shaft is supported on a recess formed on one side of the front body.

Abstract: A safety valve apparatus (25) for feeding predetermined liquid (21) from a tank (22) to a diaphragm pump (1) in which a central rod (3) is reciprocally slidable by air pressure to forcibly pump out the liquid. The safety valve apparatus includes a housing (27, 28, 29) having a space (40) including a liquid balance port (28a) that is always in communication with the liquid in the tank, and a liquid chamber (31) including a liquid flow-in port (29a) into which the liquid from the tank flows, and a liquid flow-out port (29b) from which the liquid from the tank flows out. A valve rod slidably passes through the housing and is provided at its end near the liquid chamber (31) with a valve body (45) that is capable of being seated in the flow-in port (29a). Also, a diaphragm (34) is disposed within space (40) so as to be attached between the valve rod (32), which protrudes into the space (40), and an inner peripheral wall of the space.

Abstract: A method for controlling the supply flow through a compressed fluid system having a fluid compressor with a inlet valve, and a host system in signal receiving relation with a supply flow sensor and in signal transmitting relation with a compressor controller.

Abstract: A fluid pumping apparatus (10) includes a soft start valve (16) coupled with the outlet of a pump (14) driven by an electric motor (12) for reducing the startup current of the motor (12). The preferred valve (16) includes a fluid chamber (32), a valve operator in the nature of a ball (22) shiftable in the chamber (32) between the inlet (36) and a valve seat (48), and a biasing assembly (24) including an axially shiftable rod (54) and a spring (56) for biasing the rod (54) against the ball (22) in order to bias the ball (22) toward the chamber inlet (36). Upon startup, the valve (16) provides a reduced start pressure, less than the pump pressure under load, at the inlet (36) as the operator (22) moves toward the seat (48). The chamber (32) presents a volume sufficient for the valve (16) to provide the start pressure long enough for the motor (12) to achieve synchronous speed, thereby reducing motor startup current.

Abstract: The invention relates to a fuel delivery pump for a fuel injection pump for internal combustion engines, with a pair of rotating displacing elements, which deliver fuel from an intake chamber connected to a storage tank, along a supply conduit that is formed between the end face of the rotating displacing elements and the circumference wall of the pump chamber, into a pressure chamber connected to the fuel injection pump, and with a bypass conduit, which is integrated into a housing of the fuel delivery pump and connects the intake chamber to the pressure chamber, and which is opened by means of a pressure valve disposed in it, wherein the intake chamber is closed with a check valve that operates counter to the fuel delivery direction.

Abstract: A fuel delivery pump for a fuel injection pump for internal combustion engines, which includes a pair of gears that mesh with each other and are driven to rotate in a pump chamber. The gears deliver fuel from an intake chamber connected to a storage tank, along a supply conduit that is formed between the end face of the gears and the circumference wall of the pump chamber, into a pressure chamber connected to the fuel injection pump. A conduit is integrated into a housing of the fuel delivery pump and connects the intake chamber to the pressure chamber. The conduit can be opened by means of a pressure valve disposed in it, wherein the pressure valve is functionally connected to a throttle valve that throttles the fuel supply into the intake chamber as a function of the controlled pressure on the control valve via the pressure chamber.

Abstract: A fluid pumping apparatus (10) includes a soft start valve (16) coupled with the outlet of a pump (14) driven by an electric motor (12) for reducing the startup current of the motor (12). The preferred valve (16) includes a fluid chamber (32), a valve operator in the nature of a ball (22) shiftable in the chamber (32) between the inlet (36) and a valve seat (48), and a biasing assembly (24) including an axially shiftable rod (54) and a spring (56) for biasing the rod (54) against the ball (22) in order to bias the ball (22) toward the chamber inlet (36). Upon startup, the valve (16) provides a reduced start pressure, less than the pump pressure under load, at the inlet (36) as the operator (22) moves toward the seat (48). The chamber (32) presents a volume sufficient for the valve (16) to provide the start pressure long enough for the motor (12) to achieve synchronous speed, thereby reducing motor startup current.

Abstract: In one embodiment a reverse osmosis permeate pump with shut off valve and reverse osmosis system employs bypassed feed water from the reverse osmosis membrane to drive a water wheel and gear set to reciprocate a piston back and forth between two chambers in the pump. Permeate from the membrane is introduced to the respective chambers by a pair of fluid inlets and discharged from the respective chambers through a pair of discharges to a storage tank. Flow through these respective inlets and discharges is a function of the direction in which the piston is moving and whether it is imparting a pressure or suction on a given chamber. A second piston is exposed to the pressure in the discharges from the chambers and the second piston moves between a position permitting incoming feed flow to the membrane, and a position blocking that flow upon increase in pressure in the fluid discharge from the chambers. In another embodiment, the reverse osmosis permeate pump is powered by an independent source of power.

Abstract: A scroll-type fluid displacement apparatus has two interfitting spiral-shaped scroll members which have predetermined geometric configurations. The novel design provides an oil-gas separation and circulation system in which the oil, through a reservoir in the close proximity of the thrust bearing and metering orifices network, is properly and promptly directed to the scroll compression chamber, Oldham ring and bearings to provide lubrication and cooling. This invention also provides a notch mechanism at the tip of the orbiting scroll member during operation to avoid the orbiting scroll wrap from completely blocking the oil injection ports of small size on the fixed scroll base. This invention further relates to a gas intake system which directs gas from the oil-gas separator/sump to close the intake control valve and maintain low power consumption during unload mode.

Abstract: An improved air inlet cover and impeller for a convertible electric blower/vacuum. The blower/vac includes an electric motor which drives an impeller. A plurality of blades located on the impeller define a frusto-conical surface of revolution. The air inlet cover includes an integral, frusto-conical pressure ring which is located offset but generally congruent to the surface of revolution defined by the impeller blades. The cover additionally includes an air grate that allows the passage of air but prevents the passage of other objects. The grate also includes a choke member for adjusting the effective area of the air inlet into the blower/vac to control the exit air volume and velocity of the blower. The cover also includes a bell-mouthed opening integral with the choke member to increase the efficiency of the blower/vac when in the blower mode.

Abstract: A variable capacity vane compressor includes side members secured to opposite end faces of a cylinder block, respectively, and a rotary plate mounted in one of the side members, for adjusting compression starting timing of the compressor to thereby increase or decrease capacity or delivery quantity of the compressor.

Abstract: A simplified control valve system is provided wherein a single multi-functional orifice provides the required bleed from the control cylinder chamber as well as the required venting of the system for blow down. Preferably, the control line will be an oil scavenger line and the multi-functional orifice will be positioned in the inlet passage of the valve to the compressor and a suitable oil sump positioned adjacent to the multi-optional orifice to collect any oil blown there through during blow down. The valve of the present invention is also adjustable by rotating the valve stem to which the control piston is connected.

Abstract: A simplified combustion engine driven heat pump system having electric power co-generation capability includes a compressor unloading valve to reduce demand on the engine and optimize the efficiency of intermittent power generation during heat pump system downtime. Some benefits of electrical power generation available in more sophisticated system designs are thereby obtained with a smaller, simpler, inexpensive and reliable system.

Abstract: A sewage lifting station having at least two solid waste collection chambers for receiving pumped solid waste-contaminated sewage. The station has a collection tank for receiving pre-treated waste water flowing from the solid waste collection chambers via connection pipes. Each solid waste collection chamber is connected to a pump to empty the collection tank via one of the connection pipes and solid waste collection chambers to pump the current of sewage into a pressure pipeline. There is a closing device connected to each connection pipe to selectively close an exit orifice in the connection pipe and open a connection to an operating pump to drain the collection tank. A control device alternately closes and opens the exit orifices with the closing devices so that an exit orifice allocated to an operating pump is closed and an exit orifice allocated to a non-operating pump is simultaneously and automatically opened.

Abstract: A precision demand axial piston pump with at least one spring for reducing cavitation. The pump includes a drive shaft driven to rotate about a drive axis of rotation. A cylinder block is connected disposed within a casing and is to rotate with the drive shaft and defines a plurality of cylindrical bores arranged parallel to a block axis of rotation. A fixed angle swash plate is positioned adjacent the cylinder block. A valve plate is mounted adjacent the cylinder block and defines an inlet passage and an outlet passage for fluid communication. A plurality of pistons, each having a shoe end, connected to a shoe, and a pressure face end, are slidably received in one of the cylindrical bores. The fixed angle swash plate provides the method for reciprocating the pistons with each revolution of the cylinder block. A throttle valve is positioned to control flow volume through the inlet passage and the pump.

Abstract: A fuel pump with an inlet through which fuel is drawn from a fuel tank and an outlet through which fuel is discharged under pressure to an operating engine of a vehicle has an inlet throttle valve actuated by the pressure of the pump outlet fuel to at least partially restrict the flow of fuel through the inlet of the fuel pump and thereby reduce the flow rate of fuel discharged from the fuel pump when the fuel pump is delivering more fuel than is being consumed by the engine. The valve is preferably received within an inlet module between the fuel tank inlet and the fuel pump inlet. Preferably, the valve is slidably received in a passage in the module and actuated by a diaphragm received in the passage and displaceable by the pressure of the pump outlet fuel in response to engine fuel demand.

Abstract: A recovery system for recovering hydrocarbon vapor given off by motor vehicle tanks while they are being filled with liquid fuel via at least one dispensing pipe. According to the invention, said recovery system comprises a recovery pipe associated with said dispensing pipe, a power pump placed on said recovery pipe, and a metering pump driven by a motor at an angular velocity that is substantially proportional to the volume flow rate of liquid fuel delivered by the dispensing pipe, said metering pump being mounted in series with said power pump via a differential pressure expander-regulator suitable for maintaining a pressure difference that is small between the outlet and the inlet of the metering pump so as to obtain a vapor volume flow rate that is substantially proportional to the angular velocity imparted by said motor. Application to dispensing liquid fuel.

Abstract: A variable-capacity swash-plate operated single-headed piston type compressor including a crank chamber having a capacity large enough for receiving a drive shaft, a rotor, a swash plate and shoes engaging between the swash plate and single headed pistons and provided with an open mouth for directly receiving a refrigerant gas returning from an external refrigerating system, a suction passageway for providing a fluid communication between the crank chamber and a suction chamber from which the refrigerant gas is sucked into respective cylinder bores so as to be compressed by the single headed pistons, and a capacity control valve provided with a bellows element for adjustably changing the cross sectional area of the suction passageway in response to a change in a pressure prevailing in the suction passageway.

Abstract: A refrigerant compressor includes a compressor housing divided by a valve plate into a first chamber and a second chamber. The valve plate includes suction conduits linking the first chamber with the suction chamber and discharge conduits linking the first chamber with the discharge chamber. A suction valve member bends to open and close the suction conduits in response to changes in discharge chamber pressure and the resulting pressure difference between the first chamber and the suction chamber. A suction valve control mechanism includes a regulator for regulating the opening and closing of the suction conduit between a maximum opening position and a minimum opening position in response to changes in discharge chamber pressure. Consquently, a starting torque shock to the compressor is reduced while maintaining high volumetric efficiency of the compressor.

Abstract: A compressor has a swash (slanting-cam) plate located in a crank chamber and mounted on a drive shaft. The cam plate is tiltable between a maximum inclined angle position and a minimum inclined angle position with respect to a plane perpendicular to an axis of a drive shaft according to a difference between the pressures in the crank chamber and a cylinder bore. The cam plate varies the stroke of a piston in the cylinder bore based on an inclination thereof to control the displacement of the compressor. A shutter member is movable between a first position where the shutter member connects a external circuit with a suction chamber and a second position where the shutter member disconnects the external circuit with the suction chamber in response to the inclination of the cam plate. The cam plate moves the shutter member to the second position when the cam plate is at the minimum inclined angle position to minimize the displacement of the compressor.

Abstract: A method for controlling compressor discharge pressure in a compressor. The compressor comprising a compression module driven by a prime mover, the compression module having a discharge port through which a compressed fluid is discharged with a discharge pressure, and an inlet through which uncompressed fluid is flowed into the compression chamber, the flow of fluid through the inlet controlled by an inlet valve repositionable by an actuator driven by a motor. The method comprising the steps of running a discharge pressure control routine, comprising the steps of: calculating the difference between the actual discharge pressure and a predetermined setpoint discharge pressure; computing the required change in valve position to achieve the setpoint discharge pressure, the period of time the motor means must be energized to produce the change in valve position, and the direction the valve must be moved to produce the setpoint discharge pressure.

Abstract: A flooded compressor control system that comprises a flooded compressor (11), an inlet throttle valve (14) and a final filter (25) mounted separately from a separator vessel (23) wherein the inlet throttle valve (14) and the final filter (25) form a combined assembly, the final filter (25) further incorporates a minimum pressure valve (28) that controls the discharge of clean compressed gas from the final filter (25) resulting in a reduction in the number of pipe joints in the system.

Abstract: A compressor has a refrigerant gas passage selectively connected to and disconnected from a refrigerant circuit apart from the compressor. A swash plate is supported on a drive shaft for integral rotation with inclining motion with respect to the drive shaft to drive the pistons. The swash plate is moveable between a maximum inclined angle and a minimum inclining angle. A disconnecting member disconnects the refrigerant circuit from the refrigerant gas passage when the swash plate is at the minimum inclined angle.

Abstract: A rotary screw compressor system is provided wherein the base plate connecting the prime mover to the compressor integrates the drive transmission with the lubricating fluid flow path between lubricating circuit components. Each of those circuit components and the compressor is removably mounted to the base plate via segregating housings. The compressor is mounted to the base plate with drive shaft and working fluid outlet on the same side. A pre-separation chamber is included within the base plate to facilitate removal of lubricant from the compressed working fluid prior to passage of the working fluid through the separator component. A double seal arrangement is provided about the connection of the prime mover drive shaft to the base plate. That seal arrangement includes a lubricant collection chamber between the seals, and control air is used to recycle lubricant from that chamber to the air inlet of the compressor.

Abstract: A variable capacity single-headed piston type compressor having a cylinder block defining therein a plurality of cylinder bores in which single-headed pistons are reciprocated so as to compress refrigerant gas in response to a rotation of rotation-to-reciprocation converting unit arranged in a crank shaft defined by the cylinder block and a front housing hermetically attached to a front end of the cylinder block, the crank chamber being provided with a suction gas inlet port formed so as to open into the crank chamber, a rear housing hermetically attached to a rear end of the cylinder block and defining a suction chamber for the refrigerant gas before compression and a discharge chamber for the refrigerant gas after compression, the suction chamber being in fluid communication with the crank chamber so as to receive the refrigerant gas from the crank chamber via a fluid passageway for the suction of the refrigerant gas, and a flow regulating valve arranged in the fluid passageway to adjustably change the cros

Abstract: The compressor has a cylinder chamber, a control plate provided with an inlet hole, a gas exchange chamber, and gas supply passages. The cylinder chamber is in communication with the gas exchange chamber via the inlet hole in the control plate. The gas exchange chamber is in communication with the outside via the gas supply passages. When the displacement is small, a part of refrigerant gas inside the cylinder chamber is bypassed to the gas exchange chamber from the inlet hole in the control plate. Therefore, great pressure variations are induced in the gas exchange chamber, but the gas exchange chamber is in communication with the outside via the considerably long gas supply passages. These passages mitigate the pressure variations transmitted to the outside. Furthermore, the passages act also as a muffler. Consequently, pressure variations inside the gas exchange chamber are prevented from being transmitted to external piping and so on; otherwise noise would be produced.

Abstract: A compressor has an internal refrigerant gas passage selectively connected to and disconnected with an external refrigerant circuit separately provided from the compressor. The compressor has a reciprocable piston in a cylinder bore formed in a housing for compressing gas supplied from the external refrigerant circuit to the internal refrigerant gas passage. A drive shaft is rotatably supported by the housing. A swash plate is supported on the drive shaft for integral rotation with and inclining motion with respect to the drive shaft. The swash plate is movable between a maximum incline and a minimum incline. A disconnecting apparatus disconnects the internal refrigerant gas passage from the external refrigerant circuit when the swash plate is at its minimum incline. A restricting member restricts the amount of gas to be passed through the internal refrigerant gas passage in association with the disconnecting apparatus when the swash plate moves.

Abstract: A method for adjusting an air conditioner compressor for a particular vehicle application involves selecting the proper control curve. The control curve is a graph of suction inlet pressure verses discharge pressure. The graph has a linear portion over which increased discharge pressure decreases suction pressure. The low demand condition at which suction pressure is highest and discharge pressure lowest may result in an evaporator outlet pressure that is too high or too low. To change the evaporator outlet pressure, the control valve for the compressor is adjusted or replaced to vary the slope of the linear portion of the control curve. Varying the slope will change the maximum suction pressure to reach an optimized solution under low demand conditions. The slope is varied by changing a bias pin in the modular control valve to one of a different diameter. The bias pin is one factor that controls the opening and closing of the valve to vary the capacity of the compressor.

Abstract: A compressor has a swash plate tiltable between a maximum and minimum inclining angles with respect to an axis of the drive shaft according to a difference between pressures in a crank chamber and a suction chamber. An electromagnetic valve is disposed in a pressure passage, and opens or closes the pressure passage according to instruction of an external computer. This instruction is based on an operation status of the compressor so that the electromagnetic valve adjusts the pressure in the crank chamber. The pressure passage connects the crank chamber and the suction chamber. The swash plate is inclined toward the maximum inclining angle when the pressure passage is open to release the pressure in the crank chamber to the suction chamber. The swash plate is inclined toward the minimum inclining angle when the pressure passage is closed to increase the pressure in the crank chamber.

Abstract: An air compressor in which oil loss due to the pressure in the cylinder becoming negative during an unload can be prevented, thereby protecting an outlet-side unloader valve. An air leak hole with a specific ventilating resistance is formed between a valve body and a valve seat of an intake-side unloader valve when the intake-side unloader valve is closed. Also, a valve seat portion is provided, which cuts off a sliding portion of the outlet-side unloader valve from the outlet passage when the outlet-side unloader valve is opened.

Abstract: A gear for motor vehicles provided with a positive-displacement pump for supplying a lubricating device and the control and activating devices of the gear. The positive-displacement pump is driven by the rotation of a drive motor and is provided with a suction throttle which adjusts the flow of lubricating oil such that a relatively constant flow is maintained over a varying range of rotational speeds of the drive motor. The invention provides the advantages that gear efficiency can be improved since high rotational speeds of the drive motor do not cause a excessive flow of lubricating oil.