Abstract: An in-tank type electrically operated fuel pump assembly includes an electric motor which is controlled by a control circuit located externally of a pump housing and adjacent to a passage through which fuel is fed from the pump. A case in which the control circuit is enclosed is not subjected to a high pressure, assuring stable protection of the control circuit for a long period of time. Furthermore, the control circuit is effectively cooled by the flowing fuel.

Abstract: A jet pump includes a power fluid inlet, a pumped fluid inlet having a conduit therein, a fluid outlet and a downstream structure of generally frustoconical shape having a small end adjacent the pumped fluid inlet conduit, a large end downstream of the small end and a central passage. In several embodiments, the downstream structure is a series of washer like rings of increasing size. In other embodiments, the downstream structure is a solid body. Several embodiments include an upstream structure having a central power fluid inlet conduit sealed relative to the pump housing having a disc thereon downstream of the pumped fluid inlet. The disc provides a series of passages in the form of notches in the disc periphery or openings through the disc body.

Abstract: In a lysholm compressor having intermeshing male and female rotors rotated in a casing to compress an axially flowing gas, discharge-side shafts of the rotors are borne by discharge-side bearings to fix the discharge-side shafts in thrust direction while suction-side shafts of the rotors are borne by suction-side bearings to allow the suction-side shafts to move in the thrust direction. Clearances of the rotors to the casing are properly set or selected.

Abstract: A screw compressor having a female rotor and a male rotor which perfectly mesh with each other through their profiles generated by a plurality of continuously connected curves which are so determined that the working efficiency of the screw compressor can be increased and the mechanical loss thereof can be reduced through the rotation and mesh of the female and the male rotors.

Abstract: An ophthalmologic apparatus has an illuminating system for illuminating the fundus of an eye to be examined with infrared light from substantially the front of the eye to be examined through a pupil area, the illuminating system having a light source, and an image pickup camera for receiving infrared reflected light from the fundus of the eye to be examined illuminated by the illuminating system on an image pickup surface conjugate with the front eye part of the eye to be examined. The turbid state of the light transmitting body portion of the eye to be examined can be ascertained by the image output from the image pickup camera.

Abstract: A liquid ring machine having a housing in which there is rotatably arranged a rotor having its axis displaced by an amount of eccentricity with respect to the axis of the housing. The liquid ring machine is capable of optimal use in simple manner for both vacuum and compression operations. This result is obtained by ensuring that amount of eccentricity from the housing axis to the rotor axis is directed to oppose the direction of the force of gravity in vacuum operations and is directed in the direction of the force of gravity in compression operations.

Abstract: An assembly comprises a tubular shaft that has a first axial end and a second axial end. A tubular pump is housed within the shaft and is driven by an electric motor. A lid is detachably connected to the first axial end of the shaft. At least one line is connected to the electric motor. The tubular shaft has an opening adjacent to the first axial end. A u-shaped frame is disposed within the opening such that an open part of the frame faces the first axial end. The at least one line is disposed within the frame to form a fluid tight seal about the first end and the at least one line.

Abstract: A hermetic compressor includes a sealed casing which accommodates therein a compressing unit for compressing a refrigerant and a driving unit for driving the compressing unit. A communication passage is provided for establishing communication between the compressing unit and a discharge muffler. The discharge muffler is formed therein with a substantially annular hermetic passage for the compressed refrigerant introduced via the communication passage. In the substantially annular hermetic passage, the introduced compressed refrigerant is bifurcated in opposite directions. The substantially annular hermetic passage has an outlet in the discharge muffler. At the outlet, the bifurcated refrigerant joins and flows out of the substantially annular hermetic passage so as to reduce pressure pulsation of the compressed refrigerant by canceling pressure pulsation components contained in the bifurcated refrigerant.

Abstract: A rotary piston internal combustion engine has a casing including a central portion and two side portions. The central portion has a trochoidal inner mantle surface. An eccentric shaft extends through the casing and has an eccentric portion with a friction bearing. Main bearings for supporting the eccentric shaft in the casing are provided. A rotary piston, triangular in cross-section and having an interior chamber and axial edges with sealing members, is mounted on the friction bearing of the eccentric portion. The sealing members remain at all times in contact with the trochoidal inner mantle surface during rotation. A lubricating system for lubricating and cooling the rotary piston includes an oil cooler, a closed oil reservoir, and an oil filter. The lubricating system has a first pump and substantially axially extending channels provided in at least one of the side portions in the vicinity of the eccentric shaft.

Abstract: Protective apparatus in a scroll compressor, in the form of a valve assembly, is operative to prevent compressor damage from reverse direction rotation of the scroll compression mechanism or the development of abnormally high discharge gas temperatures. The valve assembly is disposed in a passage communicating between the suction and discharge pressure portions of the compressor shell and houses a discharge temperature sensor immediately adjacent the location from which discharge gas issues from the compression mechanism. The location of the sensor and its exposure to discharge gas permits the timely sensing of abnormally high discharge temperatures and the shutdown of the compressor upon their occurrence.

Abstract: An engine mount assembly includes an axially pivotable engine support and a thrust mount with a three or four bar linkage which includes a thrust bar, as the first bar, pivotably joined to a forward axial position on the engine structure at the forward end of the first bar. The line of action of the thrust bar intersects the engine centerline at a forward vertical mount plane, which is generally perpendicular to the engine centerline and through which a forward pivotal support mount of the engine support acts to support the engine, substantially at the axial position where engine centerline and forward vertical support plane intersect. An alternate embodiment of the present invention provides a means to counter bending moments produced by aerodynamic forces acting on the nacelle of the engine particularly those referred to as lip loads.

Abstract: A pump housing including a base and head mounted to the base in a working position and a sterilize-in-place position. A flexible rolling diaphragm is positioned and clamped by the base and head in the working position to define between the diaphragm and head a working chamber. A retainer is provided for retaining the diaphragm fixed to the base when the base and head are in their sterilize-in-place position. The housing elements in their working position, exposes a first area of the diaphragm to the working chamber and in the sterilize-in-place position, exposes a second area greater than and including the first area. This provides a larger area of sterilization beyond the clamping area which is exposed in the working position of the head and base.

Abstract: A rotary device in which a seal is formed between the rotor and the stator end members by a sealing material having a coefficient of thermal expansion which is greater than that of the material of the end member in which said sealing material is located. When exposed to normal service temperatures, the sealing material bulges out of the parent material to fill in the gap between the end member and the rotor. The sealing material is wearable such that as it expands into engagement with the rotor, it will eventually wear until it no longer contacts the mating surface and a small gap or "minimal clearance" exists.

Abstract: A non-contact vane-type fluid-displacement machine includes a stator housing having an annular interior surface defining an interior bore and a rotor supported in an eccentric position in the interior bore of the stator housing relative to the annular interior surface thereof to undergo rotation relative to the stator housing about a central rotational axis. The rotor has at least one slot radially defined therein relative to the rotational axis. The machine also has at least one vane disposed in radial slot of the rotor. The vane is mounted to the rotor to undergo reciprocable movement in a radial direction relative to the rotational axis of the rotor such that an outer tip portion of the vane is maintained in a non-contacting substantially sealed relationship with the interior surface of the stator housing. Improved features of the machine relate to a suction flow check valve assembly for use in the inlet of the stator housing of the machine.

Abstract: An exhaust housing having an eductor is provided. The eductor includes an outer annular casing circumscribing an inner annular casing to define a flow path therebetween for receiving the exhaust gas from the turbine section of an engine. A plurality of struts are integral with both casings. The struts have passages that extend from the exterior of the outer casing to the interior of the inner casing. A non-oil lubricated bearing is mounted within the interior of the inner casing for journaling a rotating shaft. During operation, the kinetic energy of the high velocity exhaust gas flowing between the casings and into a tailpipe induces cooling airflow from the exterior of the exhaust section, through the passages, across the bearing, and then out to the tailpipe.

Abstract: A multi-lobed trochoidal rotor for a trochoidal rotary engine includes main body defining at least two lobes, a trochoidal peripheral surface, side faces forming part of side faces of the rotor and a substantially central bore. Each side face of the body is recessed over each lobe and a plurality of the angularly spaced apertures in each lobe provide communication between the recessed part of each side face. Closure means neatly received in each recessed area complete a respective side face of the rotor. A plurality of passageways extend through the body, outwardly from the bore and include in each lobe at least one supply passageway and at least one return passageway terminating adjacent to an inner face respectively of a first and second closure means. Pressurized oil supplied to the bore is able to flow in each lobe through the at least one supply passageway, the plurality of apertures and the at least one return passageway, to an outlet adjacent the bore.

Abstract: A self-priming centrifugal pump includes a cylindrical metal plate case forming a pressure chamber and provided with a suction inlet and a pressure outlet. The pressure chamber has a bladed impeller with a peripherally arranged diffuser, an axial ejector device including a venturi tube, and a torus-shaped interspace adapted to convey the emitted flow from the radial diffuser towards the pressure chamber. A single curved blade is arranged in the lower portion of the interspace and extends from the peripheral region of the radial diffuser up to a central annular outlet passage of the interspace which extends all around said ejector device in such a manner to counteract the rotational component of the fluid speed direction and to promote separation of air.

Abstract: A compact, easy-to-handle turbo vacuum pump includes a housing having an inlet port and an outlet port; a cylindrical rotor disposed in the housing and having a stepped peripheral surface and a plurality of blades secured to protruding corners of the steps; and a pumping mechanism portion in which a pumping stage is formed by a stator which faces the blades of the rotor across a narrow gap, and in which peripheral pump flow paths are provided in step-like recessions inside the stator. The turbo vacuum pump further includes a rotating shaft which is connected to the rotor and is rotatably supported by a radial gas bearing and a thrust gas bearing; and a motor portion for operating the rotor. Gas sucked in through the inlet port can be discharged into the atmosphere through the outlet port.

Abstract: An air-operated pump includes a pair of poppet valves affixed to a vertical valve shaft and arranged so that the upper valve is closed when the lower valve is open, and vice versa. When a connected displacer is immersed in tank fluid, its buoyancy in combination with a bias spring translates the valve shaft to operate the poppet valves. An upper poppet valve chamber is connected [1 ] via a restrictance to an auxiliary air supply, and also [2] to an air operator that triggers a three-way pneumatic valve, an inlet port of which controls a main air supply while a second port is vented to atmosphere. A third port transmits an air supply to the tank through the intermediation of a quick exhaust valve, which rapidly vents the tank at the end of each pump cycle and also serves to isolate the three-way valve from any tank-fluid contamination.

Abstract: A fan speed controller and a method which allows to maintain a constant level of thermal sensation felt by a human body when air temperature, relative humidity, thermal radiation and distance between the fan and the human body are changing. Desired thermal comfort index can be preset and fan speed is varied in response to air temperature, relative humidity, thermal radiation and distance between the fan and the human body to provide a constant level of thermal sensation.