Abstract: A variable area exhaust nozzle for a gas turbine engine comprising a plurality of arcuate flaps pivotally connected to the trailing edge of a cylindrical casing which houses the engine is provided with seals disposed within the flaps along the side edges thereof. The seals are spring biased and extensible beyond the side edges of the flaps. The seals of adjacent flaps are maintained in sealing engagement with each other when the flaps are adjusted between positions defining minimum nozzle flow area and the cruise position. Extensible, spring biased seals are also disposed within the flaps adjacent to a supporting pylon to thereby engage the pylon in a sealing arrangement. The flaps are hinged to the casing at the central portion of the flaps' leading edges and are connected to actuators at opposed outer portions of the leading edges to thereby maximize the mechanical advantage in the actuation of the flaps.

Abstract: A peristaltic pump equipped with at least one peristaltic tube is disclosed characterized in that the said tube is associated with means which limit its occlusion, independently of the physical and/or mechanical stresses to which it may be subjected. The peristaltic tube is provided with at least one longitudinal groove or ridge on the internal surface of its wall. Alternatively, a strand may extend longitudinally inside the peristaltic tube, at least over the part subjected to the action of the pressing devices, and this strand is rigid or semi-rigid and has the shape of an arc of a circle. The strand may be flexible and may be firmly attached to the peristaltic tube at least at a point located upstream from the pressing devices. Various other geometrical arrangements are disclosed. The peristaltic pump is especially adapted to extracorporal blood circulation.

Abstract: A temperature sensor is disposed at the upstream or middle portion of a reactor for oxidizing the unburned constituents contained in the exhaust gases discharged from the combustion chambers of the engine. The air-fuel ratio of the air-fuel mixture supplied to the combustion chambers is controlled so as to maintain the temperature of the upstream or middle portion of the reactor at the predetermined level in the vicinity of but higher than the temperature corresponding to the critical point where the temperature of the downstream portion of the reactor begins to decrease.

Abstract: A radial flow fan of short axial length and large radial dimensions and of the type having the drive motor arranged coaxially with respect to the fan wheel and at least partly inside of the fan wheel. The housing for the fan wheel and motor includes a flat metallic square plate forming an axial end face and a synthetic resinous material circumferential housing attached to the metal plate. The circumferentially extending housing portion also includes a portion defining the opposite end wall of the casing with respect to the metal plate end wall, which opposite end wall has a central opening for inlet of air. The synthetic resinous housing portion includes an exit port for radial exit of the air. The metal plate is connected with good heat conductivity with the stator of the drive motor by way of a flange of a bearing for the shaft of the drive motor and by way of a contact disc which axially supports the rotor shaft at the metal plate.

Abstract: Pumping apparatus which incorporates connected piston type positive displacement, slip free pumps is disclosed. They provide pumped outputs at a common displacement rate. They run out of phase to one another so that while one is pumping, the other is able to refill. A three way valve under control of a pressure responsive switch delivers pumped fluid to the down stream outlet when a pressure match is achieved. The apparatus finds application as a constant rate continuous fluid injection pump.

Abstract: A piston pump includes a fluid flow control system positioned between the fluid intake duct and the intake aperture of the piston cylinder, the control system including a cylindrical sleeve which is in fluid communication with the intake duct, a valve piston movable in the cylindrical sleeve, a valve stem connected to the intake valve in the piston cylinder extending through both the intake aperture and the valve piston, a first spring positioned between the valve piston and the piston cylinder, a second spring positioned between the piston cylinder and the end of the valve stem, and a fluid by-pass control device for regulating the amount of fluid passing from the intake duct around the valve piston to the intake aperture.

Abstract: A pump housing has an upwardly opening cylindrical bore and the bottom of the housing is blinded. Pump elements, such as a tappet and upper and lower spring seats, are slidably disposed in the cylindrical bore, wherein each of the outer diameter of the pump elements is made smaller than the inner diameter of the cylindrical bore, so that those pump elements can be assembled in place in the bore from the top of the pump housing.

Abstract: A reciprocating, fluid operated pump, which is reversed at opposite ends of its travel by shifting of a directional valve, is characterized by a control valve for rapidly and completely shifting the directional valve.In the disclosed embodiment, the pump includes a pair of pumping portions each operated by a respective reciprocating air motor. The air motors are coupled for conjoint reciprocation, and the directional valve alternately applies compressed air to one and then to the other of the air motors. The arrangement is such that when air is applied to one of the motors fluid is forced from its associated pumping portion to an outlet from the pump while fluid is drawn into the other pumping portion from an inlet to the pump, and when air is applied to the other of the motors fluid is forced from its associated pumping portion to the outlet from the pump while fluid is drawn from the pump inlet into the one pumping portion.

Abstract: To remove pollutants in the exhaust gases from a liquid fuel driven engine, a turbosupercharger, including a turbine and a compressor, is combined with the engine to provide both afterburning and catalytic oxidation. The exhaust gases are accumulated to provide combustion in advance of the turbine. Further, air is branched off from the compressor and mixed with the gases flowing through the turbine to afford combustion of the gases after they pass through the turbine. Catalytically active surfaces are located within the turbine for the reduction of nitric oxides.

Abstract: A recuperator having refractory walls has ceramic recuperator tubes which are located at each of their ends in tapering bores in the recuperator walls. The ends of the tubes are sealed in the bores in the walls by a number of precompressed fibrous refractory rings of different diameter which are in turn held in place and prevented from expanding by refractory locking rings that engage the sidewalls of the bores through a bayonet fitting. Ceramic inserts may be provided in the recuperator walls to form the bores. Buffer rings are provided between the locking rings and the tube ends, and a thrust washer is provided between the fibrous rings and the locking rings.

Abstract: A vacuum pump assembly has a conventional electric motor, a mounting plate centered with respect to the drive shaft of the motor, and a self-contained, replaceable modular pumping apparatus. The module has a stator, a rotor, and axially opposite end plates enclosing a pumping chamber, and is detached easily, quickly mounted onto the mounting plate as a unitary assembly, and operatively connected to the drive shaft of the motor by a shock-absorbing self-aligning coupling. It is enclosed by a pump housing containing lubricant for lubrication and sealing purposes during pump operation. The pumping module has a double seal to maintain lubricant and to allow the shaft connected to the rotor to center itself relative to the mounting plate and the motor.

Abstract: Device for supplying fuel to the atomizer of a combustion engine comprises at least a pump to be connected with the atomizer having a piston-bounded pump chamber and an electromagnet for reciprocating said piston.Said device is improved, particularly with regard to the seal of the pump piston, the control and the adjustment of the pumped quantity of fuel, the life-time and the cooling of the device, the compactness and simplicity of construction and/or simplification of maintenance.

Abstract: A quiet and powerful vacuum cleaner-blower assembly comprises an improved quiet operating electric motor coupled to and driving an improved quiet operating blower. The motor has improved cooling air flow with cooling air inlet and discharge openings disposed to minimize noise. An axial flow cooling air fan impinges the cooling air onto sound absorbing material before discharging the cooling air from the motor. The blower has a high efficiency impeller utilizing forward and backward curved vanes which discharge air into a casing having a chamber with a cross-sectional flow area which linearly increases as air moves around the periphery, resulting in quiet operation and increased capacity with a less than expected increase in power consumption. The vacuum cleaner-blower assembly may be operated in conjunction with stationary guide blades for improving the flow of air into the impeller, resulting in still further increase in capacity without substantial increase in noise or power consumption.

Abstract: The inlet of the fuel overflow line of the injection pump is provided with a choke means having at least two choke points disposed in series while a shut-off means is provided for the fuel feed line to prevent a pressure wave from entering the feed line during overflow. Various embodiments are described to show the choke means and shut-off means in separate lines, in parallel in the feed line or within each other in the feed line.

Abstract: A downhole, hydraulically actuated pump assembly, having an engine reciprocatingly connected to a production pump. Power fluid is conducted downhole to the engine of the pump assembly, while production fluid and spent power fluid is conducted uphole to the surface of the ground.The pump assembly includes a housing within which spaced, axially aligned, cylindrical chambers reciprocatingly receive spaced engine and pump pistons which are connected together in a manner to enable the engine to reciprocate the production pump.A mechanically actuated valve assembly is contained within the engine piston and is arranged respective to various different flow passageways so that flow of power fluid through the engine forces the engine piston to reciprocate.The valve assembly includes a control rod and a valve element concentrically arranged respective to one another and to the engine piston. The valve element is reciprocated respective to the engine piston in response to the reciprocation of the control rod.

Abstract: A high pressure pump in which at least one reciprocatingly driven piston acts on a hydraulic fluid communicating with one side of a diaphragm, the other side of the diaphragm communicating with a fluid to be displaced by the pump. The diaphragm is made of elastomeric material, and is relatively thick so that it is substantially self-restoring on the return stroke of the piston even in the event of total blockage of the supply of fluid to be displaced.

Abstract: Extracorporeal blood pumping apparatus for use, for example in cardiopulmonary bypass procedures, left ventricle assist, hemodialysis and the like. The pulsatile pump apparatus may comprise an elongated driver balloon and a similar blood pumping balloon positioned side by side in a rigid casing or housing having preferably a one-way air valve. The inlet and/or outlets of both balloons are off-set and sloping ballon end portions are provided, inter alia, to minimize folding and/or rubbing during use. The driver balloon is provided with a port for coupling to a pressure-vacuum source and the blood pumping balloon is provided with an inlet port and an outlet port and both balloons are of such a cross sectional size and construction as to provide non-occlusive action by the blood pumping balloon.

Abstract: A apparatus for decreasing fuel consumption of and noxious emissions from an internal combustion engine. Exhaust gases from the engine exhaust are passed through a static structure dual 90.degree. band pipe section to a selective sampler, wherein certain species are removed from the exhaust stream and the bulk of the gases pass through and exit the exhaust system. The removed species are recirculated back to the engine intake system to provide a reconstituted charge, and any liquids removed from the recirculatory lines are vaporized and also fed into the intake system. The sampler includes a number of pipes having louvers therein cooperating with the interior of a pipe section connected to the static structure.

Abstract: An engine driven reciprocating air compressor. The engine is operated in a through scavenge two-stroke mode. The engine has opposed pistons reciprocating in opposition in a cylinder, the pistons being rigidly connected to respective compressor pistons working in compressor cylinders. A crankshaft rotates about an axis perpendicular to and intersecting the engine cylinder axis. The piston pairs are directly coupled to the crankshaft by connecting rods. The crankshaft synchronizes the piston pairs, defines their strokes, and provides rotary motion for auxiliary devices. The connecting rods and crankshaft are lightweight and do not transmit full engine power. The piston pairs are provided with inward return energy from a flywheel on the crankshaft and air trapped in compressor cylinder clearance volumes. The inward faces of the compressor pistons may be used to compress fuel/air mixture to the scavenge pressure.

Abstract: A hose pump comprising a housing having a cylindrical rolling surface then and an annular groove which extends in the center of the rolling surface and is adapted to receive an elastic hose therein. A cylindrical drive member is arranged concentric with respect to the rolling surface and is connected to the housing through a fixed bearing. Pinch rollers are provided which roll along planetary-gearlike on the rolling surface and on a hose in the groove and are driven by the drive member sun-gearlike through frictional resistance. The pinch rollers are constructed as resilient and hollow cylinders.