Abstract: A pump for transferring fragile and aggressive fluids such as human blood, the pump comprising a housing with a sealed annular wall of uniform thickness forming a pumping chamber. The chamber is provided with inlet and outlet ports with a rotor being housed within the chamber coaxially of the housing. The housing includes opposed end cap portions with a cylindrical body portion interposed therebetween. The body portion includes first and second cylindrical segments with mating side walls adapted to be coupled together along an annular bonding seam, the arrangement providing for separation along the bonding seam to permit removal and reworking of the rotor for replacement in a fresh housing.

Abstract: A system for remote-controlling a fire pump with a simple wiring construction is provided, being capable of conducting various kinds of control and display. The fire pump control system has an engine, a fire pump, an internal control apparatus, at least one external control apparatus located away from the fire pump including the internal control apparatus, and a twisted pair line for connecting the external control apparatus with the internal control apparatus. The internal and external control apparatuses form a network through the twisted pair line so as to control the fire pump through telecommunications from the external control apparatus. This network uses a p-CSMA system for communicating data, so that a high level of remote control can be carried out, with monitoring an operation state of the fire pump.

Abstract: There is provided a fluid pump wherein in a casing at a pump unit there is provided an impeller coupled with a rotor contactless and also supported contactless by a controlled magnetic bearing unit, and rotated by a motor to output a fluid, with a position detection unit, an electromagnet or a motor stator cooled by a fluid flowing through a pump chamber.

Abstract: A heat dissipation fan has a casing, a stator, a lubricating bushing and a fan. The stator is secured to the casing with a sleeve. The lubricating bushing has lubricant contained therein and is mounted in the sleeve. The fan is rotatably mounted in the casing and has a permanent magnet to be a rotor. A shaft extends from the fan and through a passage defined through the lubricating bushing. A locking disk is securely mounted on the shaft to hold the lubricating bushing. An oil guide is arranged on the lubricating bushing. Accordingly, the air in the cavity can be released from the oil guide during the assembly of the dissipation fan. The oil guide can keep oil from flowing out of the sleeve and drying out the lubricating bushing. The useful life of the dissipation fan is prolonged.

Abstract: A compressor which has a housing defining therein a suction chamber, a discharge chamber and a crank chamber, a drive shaft rotatably supported in the housing, a first end of which penetrates through the suction chamber and protrudes from the housing, and a second end of which is disposed in the crank chamber, a single-headed piston accommodated in a cylinder formed in the housing, and a swash plate integrally rotatably mounted on the drive shaft and coupled with the piston. The cylinder is located between the crank chamber and the first end of the drive shaft so that pressure in the crank chamber acts on the drive shaft in an opposite direction of compressive reaction force acting on the drive shaft. A shaft seal is provided on the drive shaft between the suction chamber and the first end of the drive shaft in order to seal the suction chamber.

Abstract: A pressure exchanger for simultaneously reducing the pressure of a high pressure liquid and pressurizing a low pressure liquid. The pressure exchanger has a housing having a body portion; with end elements at opposite ends of the body portion. A rotor is in the body portion of the housing and in substantially sealing contact with the end plates. The rotor has at least one channel extending substantially longitudinally from one end of the rotor to the opposite end of the rotor with an opening at each end. The channels of the rotor are positioned in the rotor for alternate hydraulic communication with 1) high pressure liquid and 2) low pressure liquid, in order to transfer pressure between the high pressure liquid and the low pressure liquid. Because of the high pressures and the high angular velocities, this is a highly cavitation prone structure, In order to prevent cavitation, there are one or more grooves in one or both of the end plates.

Abstract: A pumping apparatus for delivering water upwardly from a holding area and over a holding area bank includes an apparatus base; a water drawing pipe having a pipe intake end and a pipe discharge end and being mounted to the apparatus base and extendable from the apparatus base; an impeller rotatably mounted within the drawing pipe discharge end; a hydraulic motor drivably connected to the impeller at the drawing pipe discharge end; a hydraulic pump having a pump intake side and a pump output side; a flexible hydraulic supply hose connected to the pump output side and extending along the drawing pipe to the hydraulic motor; a flexible hydraulic return hose extending from the hydraulic motor along the drawing pipe to the pump intake side; a segmented hose track having a longitudinal track passageway through which the supply and return hoses extend and having a minimum bend radius great enough to prevent the supply and return hoses from kinking.

Abstract: A compressor for a refrigeration unit having a stator, a rotor orbiting in engagement with the stator to cyclically open, fill with refrigerant gas from at least one inlet port, compress and discharge compressed refrigerant gas through at least one discharge port, a rotary drive for orbiting the rotor, a driven element of a magnetic coupling in driving connection with the rotary drive, a casing sealed save for the ports and enclosing all of the foregoing components, a driving element of the magnetic coupling outside of the casing in close proximity to the driven element, and a motor to rotate the driving element. Preferably the rotor is a multilobed rotor orbiting within a trochoidal chamber defined by the stator.

Abstract: A reciprocating pump includes a chamber, a reciprocating member arranged to induct a fluid into the chamber and discharge the fluid from the chamber to a delivery side of the pump, and a piezoelectric element attached to the pump and arranged to detect pressure fluctuations on the delivery side of the pump so as to sense any abnormality in the inducting and discharging of fluid.

Abstract: A hydrostatic variable displacement pump of swash plate construction has a cylinder block 2, in a housing 1, with displacement pistons 3 guided therein, a swash plate 4 and at least a first bearing 5 and a second bearing 6, which supports the angle adjustable swash plate 4. The housing 1 has a first opening, through which the swash plate can be introduced. The first bearing 5 has a removable outer race 13 which is designed such that, following installation of the second bearing 6 of the swash plate 4 in the bearing seat 8, it fixes said swash plate in the bearing seat 7 of the first bearing 5. The servomechanism 9, 10 is integrated in a cover 10 which closes off the housing 1 on the side of the first bearing 5.

Abstract: An air compressor comprises a compressor main body, and a capacity adjusting apparatus connected to an intake side of the compressor main body for adjusting the intake air flow into the compressor main body. The capacity adjusting apparatus is provided in an intake pipe. The intake pipe is adjacent to a discharge pipe of the compressor. A communicating passage is formed in the adjacent portion so as to introduce the compressed air discharged from the discharge pipe into the intake pipe system. The intake pipe is provided with an opening port for limiting the intake air flow into the compressor main body. The capacity adjusting apparatus opens and closes the communicating passage and the opening by means of an intake port switch valve and a discharge ventilating port switch valve which are provided in an end portion of the capacity adjusting apparatus.

Abstract: A pump and methods for compressing a fluid are provided that comprise a pump head comprising a flexible metal diaphragm attached to a rigid compression chamber. Fluid compression is provided within the rigid compression chamber when the flexible diaphragm is mechanically oscillated back and forth by a linear motor operated at a drive frequency that is at or below the mechanical resonance of the moving parts, mechanical springs and gas springs. Tuned ports and valves allow low-pressure fluid to enter and high-pressure fluid to exit the compression chamber in response to the cyclic compressions. The linear resonance pump provides high frequency operation, small diaphragm displacements, and high compression ratios for gases.

Abstract: A Positive Fluid Displacement Device (PFDD) with single piece double-ended pistons connected to a crankpin for circular motion. Pistons are nested together to maintain all pistons in the same plane perpendicular to the axis of the crankshaft. Cylinders are driven in a reciprocating fashion by the pistons and are held loosely in a cylinder carriage along its axis with radial sealing engagement therebetween. Pliable members mount port plates within a housing such that there is no direct contact therebetween or with a two-layer manifold. A flat surface of the port plate is urged against the cylinder head by a pliable member which exerts a force on the center of the port plate. Grooves in the first layer of the manifold are sealed by the second layer to form fluid passageways. The cylinder head is guided in housing grooves with a pliable member. A sealing lip is integral with a piston head.

Abstract: A portable air moving apparatus for providing personal air cooling includes a container with open top and supported by plural wheels attached thereto. The container encloses electrical components including a battery, a radial flow air moving device, and a switch. These components are interconnected by electrical conductors such that the switch can make and break a circuit for driving the air moving device with the battery. A removable container lid provides an aperture for receiving an air exhaust from the air moving device which is then directed toward an individual to provide cooling. The container lid is adapted for being set to allow air flow into the container so as to feed the air moving device.

Abstract: An integrated, i.e unitary, rotary hydraulic vane pump assembly reduces cost and simplifies manufacturing thereof. The integrated assembly includes an electric motor, a rotary vane pump, a pump housing and an end bell. The end bell has an inlet fitting or passageway which communicates with the inlet of the rotary vane pump. The pump housing receives the vane pump and is received within the end bell. The electric motor is secured to the face of the pump housing opposite the end bell. The pump housing includes outlet passageways and a centrally disposed axial opening for receiving an output shaft of the electric motor. The rotary vane pump includes end sections and a center, cam ring section which receives a vane rotor assembly coupled to the output shaft.

Abstract: A combination electric motor-pump unit which is installed on a body of a vehicle. The pump unit includes motor fastening screws with which the electric motor is fastened to the pump housing and which connect the pump unit to the vehicle body. This significantly reduces the number of required parts. The pump unit is provided for a brake system of a vehicle.

Abstract: A hermetic compressor assembly including a housing having mounted therein a motor and a compression mechanism which are operatively coupled by a drive shaft. The drive shaft is rotatably received in a bearing mounted in the housing. Engaging means are provided in the drive shaft and the bearing to prevent relative movement between the compression mechanism and the drive shaft in both directions along the drive shaft axis of rotation. The engaging means includes a circumferential groove provided in the drive shaft, a bore located in the bearing, and a retaining element may be in the form of a ball or an elongate pin. The circumferential groove and the bore are aligned and each receive a portion of a retaining element to prevent axial movement of the drive shaft.

Abstract: A pumping unit, particularly for water supply in remote areas of the world, comprising a pump, control valve and tipping bucket mechanism enclosed in a single housing. The pumping unit is double-acting and, does not demand the presence of a drive pipe. The pump and the automatic control valve are powered by the potential energy of the supply and an independent power source is not necessary or required. The frequency at which the unit operates may be varied by adjustment of the supply of water to the tipping bucket.

Abstract: A linear compressor, comprises a retaining member, a fixed member supported by said retaining member and formed with a hermetically sealed compression chamber to receive a working fluid therein, a pair of pistons axially movably received in said compression chamber to assume respective compression positions, a pair of piston rods each having an outer peripheral portion and slidably movably supported by said fixed member, said piston rods respectively connected to said pistons to have said pistons axially move in said compression chamber, a plurality of magnet units mounted on each of said outer peripheral portions of said piston rods, each of said magnet units having a plurality of magnet segments each made of a permanent magnet and circumferentially arranged with neighboring two magnet segments different in magnetic pole, a plurality of electromagnet units supported by said retaining member to be axially spaced apart from each other in predetermined relationship with said magnet units, respectively, and resi

Abstract: An electronic pressure sensor is incorporated into a discharge pressure portion of a compressor. If the pressure sensor indicates that the discharge pressure exceeds a maximum value, the operation of the compressor motor is stopped. The pressure sensor preferably sends an electronic signal to a microprocessor such that the pressure can be compared to a predetermined maximum value. The pressure sensor includes a transducer to change the sensed pressure to a voltage value. The microprocessor communicates with a first switch, which may be a triac switch, and which stops operation of the compressor motor should an undesirably high value be detected. In addition, a second switch communicates with a comparing circuit which ensures the voltage from the pressure sensor is between a minimum and maximum value. The purpose of the comparing circuit is to ensure proper operation of the pressure sensor and its associated circuit.