Abstract: A portable fluid pumping device includes a valve assembly having a pair of one-way umbrella valves controlling the flow of air to produce a positive pressure at one port and a negative pressure at another port. Each umbrella valve includes a valve stem having a neck received within the mounting opening, and an umbrella skirt integrally joined to the neck to overlie the valve opening. The umbrerlla skirt is relatively thin for its complete extent, and the juncture between the umbrella skirt and neck of the valve stem is of frusto-conical configuration increasing in diameter from the neck to the umbrella skirt.

Abstract: A fractional horsepower single cylinder refrigeration compressor utilizes a discharge muffler system having a discharge plenum and a pair of muffler chambers. The muffler chambers and interconnected by a transfer tube while separate passages run from the discharge plenum directly to each of the muffler chambers. One of the muffler chambers is then connected to a discharge line to the exterior of the compressor case.

Abstract: In a non-clutch compressor, by controlling a differential pressure between a crank chamber accommodating an oscillating plate therein and a cylinder chamber in a suction stroke, an incline angle of the oscillating plate is sequentially changed so that a maximum stroke of a piston is changeable. The compressor includes a passage opening and closing device arranged at an inlet section of one of a suction pipe connecting with a suction chamber of the compressor and the suction chamber, and a pressure control valve arranged between a discharge chamber and the crank chamber, the valve opening in a case where pressure in the suction chamber is less than a set value. In the compressor, a cross-sectional area (A) of a passage of a discharge hole for connecting the crank chamber with the suction chamber is expressed by an equation: 0.5<(A)<1.8 mm.sup.2.

Abstract: An oil cooled compressor includes a compressor body having a low pressure suction passage and a high pressure discharge passage. An oil tank is mounted to the discharge passage such that oil and drain water separated from a compressed gas in the discharge passage collect in the oil tank with water at a lowermost part of the oil tank. A drain water passage separate from a compressed gas discharge passage and an oil discharge passage, connects the lowermost part of the oil tank with a portion of the compressor body which is substantially at the low pressure. Drain water is thereby evaporated from the oil tank and returned to the compressor body.

Abstract: An internal combustion engine with a dual turbocharger system includes an engine, a first turbocharger and a second turbocharger arranged in parallel with each other, an intake switching valve located downstream of a compressor of the second turbocharger, and an exhaust switching valve located downstream of a turbine of the second turbocharger. At large intake air quantities, both turbochargers are operated, while at small to medium intake air quantities only the first turbocharger is operated. At "one-turbocharger-operation", when the engine load is low, the intake switching valve is opened, while the exhaust switching valve is maintained closed. Thus, at small to medium intake air quantities and low engine loads, the intake flow can be introduced through both the compressor of the first turbocharger and the compressor of the second turbocharger. As a result, flow resistance is decreased and acceleration response from low engine loads is improved.

Abstract: A hydraulic pump comprises at least one reciprocating piston (2) sliding in a stationary cylinder (4), a non-return suction valve (12) arranged between a source of fluid under low pressure and a working chamber (10) defined in the cylinder (4), and a first non-return delivery valve (16) arranged between the working chamber (10) and an outlet chamber (14) for the fluid under high pressure. A conduit (24) connects the outlet chamber (14) and the working chamber (10), the piston (2) leaving this conduit (24) open at the end of the suction period and at the start of the delivery period and closing it during the rest of the cycle.

Abstract: A main bearing device for a bent axis type axial piston pump/motor constructed such that respective sums of a thrust load and a radial load, in other words, respective total loads acting on first and second bearings, respectively, disposed in a tandem arrangement in the axial direction of the main bearing device becomes uniform. The main bearing device has a first bearing (8) and a second bearing (9) that are disposed in the tandem arrangement through inner and outer wheel seats (10, 11) and a gap defined within the range of 10 to 30.mu. is formed between the inner side end surface (12) of the outer race (8b) of the first bearing (8) and the inner side end surface (13) of the outer wheel seat.

Abstract: A piston-driven fluid pump including a drive chamber containing drive fluid and a drive diaphragm forming a wall of the drive chamber. The pump also includes a spill containment chamber disposed adjacent the drive chamber and containing drive fluid, with a pumping diaphragm forming a wall of the spill containment chamber. A pump chamber assembly is disposed adjacent the fluid containment chamber, and is in fluid communication with a source of fluid to be pumped. A selectively actuable piston pressurizes the drive fluid in the drive chamber, and a pressure compensation device, disposed in fluid communication with the drive chamber, provides selectively variable pressure relief to the drive chamber.

Abstract: The hydraulic pump comprises at least one reciprocating piston (2) sliding in a stationary cylinder (4). The piston (2) comprises, on the same side as the working chamber (10), a cylindrical skirt (22) which has the inside diameter of the cylinder (4) and in which is made at least one first port (18) putting the working chamber (10) in communication with the outer wall of the skirt (22). A second port (24) puts the duct (6) upstream of the valve (12) in communication with the outer wall of the piston (2). Finally, a slot (20) of a length at least equal to the distance separating the ports (18, 24) is made in the cylinder (4) so as to cause these ports (18, 24) to communicate over a specific zone of the reciprocating movement of the piston when the piston is sensibly at mid-stroke.

Abstract: An electromagnetic pump includes a sleeve member, a resin coil bobbin, a ring-like printed circuit board, a ring-like holder, a plurality of studs, a pump housing, and a projecting portion. The sleeve member houses a plunger for controlling an operation of a control valve. The coil bobbin is arranged around the sleeve member, has a pair of flanges, and winds an excitation coil. The printed circuit board is stacked on the outer surface side of one flange of the coil bobbin with a predetermined interval therebetween and has a surface which faces the coil bobbin and on which various types of electronic parts are mounted. The holder is stacked on the side of the printed circuit board opposite to the coil bobbin with a predetermined interval therebetween. The studs project from the outer surface of the one flange of the coil bobbin and an inner surface of the holder and integrally form a stacked body.

Abstract: A solar powered water pump combines an evacuated tubular solar collector array for heating air with a diaphragm type pump by providing an internal heat exchanger in the manifold of the collector array. The heat exchanger uses heat from the heated air to generate steam from water. The steam from the heat exchanger is used to drive the diaphragm pump. Another heat exchange medium such as freon or ammonia can be used in place of water.

Abstract: A rotary machine having a pair of back to back turbines in serial flow relationship is disclosed. Various construction details are developed which permit for a compact design. In one detailed embodiment the turbine has a housing having an inlet manifold and an exit manifold which are disposed between the outlet manifold for an associated turbopump.

Abstract: An automotive engine has a turbocharger including a turbine, a compressor driven by the turbine, and a wastegate valve provided in a bypass around the turbine, and an actuator for operating the wastegate valve so as to prevent intake pressure from becoming extremely high. The system has an intake pressure sensor for detecting the intake pressure and a throttle position sensor for detecting a throttle position. A basic control value is determined in accordance with driving conditions of the engine, and a feedback control value is calculated in accordance with the difference between the intake pressure detected by the intake pressure sensor and a limit value. When a peak of the intake pressure is detected in the acceleration state of the engine, the basic control value and the feedback control value are combined, and the actuator is driven in accordance with the combined control value.

Abstract: A dry-running reciprocating compressor which has a drive mechanism with a crankcase, in which at least one crankshaft is mounted to rotate in bearings. The drive mechanism is operatively connected with at least one piston-cylinder arrangement of the compressor to compress air to the desired compression pressure. The intake air to be compressed is used for interior cooling of the drive mechanism, and for this purpose, the intake air is conducted through a filter into the interior of the crankcase. For specific cooling of especially critical parts and areas of the components and units in the interior of the crankcase, additional air conducting devices, such as air baffles, fins or the like can be provided. Preferably, the reciprocating compressor has three stages.

Abstract: Perfusion pump driver apparatus for coupling motive power from a controller console to the rotator of perfusion pump. The coupler has a console adapter to connect the coupler apparatus to the pump control console. A pump receptacle is provided in the coupler to connect the pump to the driver. A power transfer mechanism consisting of a bushing and flexible shaft is provided in the coupler to adapt the control console characteristics to the pump characteristics.

Abstract: A valve system for a fluid pumping assembly including a valve plate having at least one intake port extending therethrough and at least one discharge port also extending therethrough. The discharge port includes a central axis extending through the discharge port and orthoginal to the valve plate. The intake port is a slot having a width less than its length and subscribing an arc radially spaced from the central axis of the discharge port. A suction reed valve has a valve member that is defined at its distal edge by an arcuate slot in the valve wherein the slot is disposed arcuately and radially spaced from a discharge aperture in the valve member and terminates at either end in inwardly extending lobe portions that define a neck portion in the valve member having an axis about which the valve member moves between open and closed positions.

Abstract: A slant plate type compressor with a capacity or displacement adjusting mechanism is disclosed. The compressor includes a housing having a cylinder block provided with a plurality of cylinders and a crank chamber. A piston is slidably fitted within each of the cylinders and is reciprocated by a drive mechanism which includes a slant plate having a surface with an adjustable incline angle. The incline angle is controlled according to the pressure in the crank chamber. The pressure in the crank chamber is controlled by a control mechanism which comprises a passageway linking the crank chamber and the suction chamber, and a valve device which controls the closing and opening of the passageway.

Abstract: A variable capacity wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for refrigerant gas before compression, a discharge chamber for a refrigerant gas after compression, a crankcase defining a crank chamber to receive therein a drive and a wobble plate mechanism mounted about a drive shaft connectable to a drive source, i.e.

Abstract: A turbocompound engine having a power turbine bypass valve and a control module for controlling opening and closing of the bypass valve. The control module opens the bypass valve for various operating conditions, such as at high altitudes, low speed/high load, and transient load conditions for improved engine operation.

Abstract: The invention relates to a compound turbo-drive for a two cylinder bank V-form internal-combustion engine with an exhaust-gas turbocharger for each cylinder bank that together feed a re-expansion turbine. To obtain a space-saving arrangement, the re-expansion turbine has a double-flow turbine housing with two integrated side inlet housings to which the exhaust-gas turbines of the exhaust-gas turbochargers are arranged horizontally.