Abstract: This invention relates to ejector pumps, thrust- and lift-augmenting ejectors, and, more generally, to devices that are capable of inducing the flow of a fluid through direct transfer of energy and momentum to it from jets of another fluid. The efficiency of the energy exchange is increased if it is made to take place, at least in part, through the nondissipative work of interface pressure forces. This invention describes a method and apparatus for the generation, control, and utilization of this nondissipative component. The method described here imparts a transverse, paddle-like motion to the energizing jets without, however, imparting the same motion to the fluid particles that make up the jets themselves, hence at no cost in energy input. Energy is transferred from these "fluid paddles" to the surrounding fluid largely through the work of interface pressure forces.

Abstract: Liquid is applied to a wire rope by passing the rope through an elongated casing in which liquid is sprayed against the rope, excess liquid being discharged through annular grooves containing discharge openings upstream and downstream of the liquid inlet. Air is blown against the rope upstream and downstream of the annular grooves and discharge openings for causing the liquid to be discharged through such openings and not through the ends of the casing.

Abstract: An air compressor is controlled such that when the pressure inside a tank for storing compressed air reaches a predetermined lower-limit value, the compressor is brought into a load running state to supply compressed air to the tank, whereas, when the pressure inside the tank reaches a predetermined upper-limit value, the compressor is brought into a stand-by state to suspend the supply of compressed air to the tank. The air compressor has a controller which judges the change in pressure inside the tank when the compressor is in a load running state on the basis of a signal delivered from a pressure sensor and effects control such that either one of two operations modes, that is, an intermittent operation mode in which the compressor stands by with the supply of electric power from a motor being cut off and a continuous operation mode in which the compressor stands by in a no-load state with the motor being supplied with electric power, is selected subsequent to a stand-by state.

Abstract: Rotary positive displacement machine for a compressible working fluid comprising two tapered, internally intermeshing members (26, 28) with eccentric axes (48, 50). The members (26, 28) have spiral grooves (34, 38) and intervening lands (36, 40) which cooperate to form closed chambers (66) varying in volume while moving axially from one end to the other. The inner member (28) has a hypocyclic movement in relation to the outer member (26). The radial depth of the grooves (34, 38) varies axially along the members (26, 28) and in each transverse plane is equal to twice the eccentricity of the axes (48, 50) of the members (26, 28) and the pitch angle of the spiral at the pitch cone varies continuously in the axial direction.

Abstract: A metering pump for discharging metered quantities of liquid and/or low viscosity materials, in particular pasty materials, on bottle-type or can-type containers has a bellows sealed between two coaxial housing parts of dimensionally stable plastic. The housing parts are telescopically movable relative to one another, and provided at each of its two ends with respective inlet and outlet pump valves. Each pump valve has an axially mobile closing element. On its discharge end, the bellows has an integrally molded annular valve seat face, provided with a passage orifice, for a spring-loaded closing element. A bellows seal includes an annular wall surface disposed against a pipe attachment which is integrally molded to a first housing part. The first housing part is provided with a discharge spout and is supported at its end face on an annular shoulder of the bellows.

Abstract: Apparatus by which a check valve assembly of a reciprocating pump can be removed. A valve stem of the valve assembly is received within a valve guide which is mounted in a valve guide bracket. The bracket is pivotally attached to a yoke. The yoke is removably fastened to an adaptor. The adaptor is seated in an access port arranged perpendicular respective to the passageway within which the valve seat is mounted. The compressive force of the valve spring maintains the bracket and yoke in assembled configuration respective to the adaptor. The bracket and yoke can be pivoted apart, against the spring force, and removed through the adaptor and then the adaptor can be removed from the access port, thereby gaining access to the remainder of the valve assembly.

Abstract: The low-noise pump assembly (10) comprises a unitized assembly wherein a drive shaft (17) of the motor (16) is mated directly with an eccentric coupling (23). The eccentric coupling (23) has a through bore (21) which receives at one end the drive shaft (17) and at the other end a center post (30) of the pump housing. Disposed between the center post (30) and eccentric coupling (23) is a radially inner bearing mechanism (60), and disposed between the exterior of the eccentric coupling (23) and an opening (52) of a ring member (50) is a radially outer bearing mechanism (70). The ring member (50) engages at least one reciprocating piston assembly (45). Rotation of the drive shaft (17) causes rotation of the eccentric coupling (23) to effect reciprocating motion of the pump piston (48).

Abstract: A vacuum generating device for an ejector pump is provided. The vacuum generating device according to the present invention comprises an ejector pump mechanism having on one of the side surfaces thereof with an air intake port, air inlet port and exhaust port and attached with a fitting base including an air intake pipe, inlet pipe and exhaust pipe capable of connecting to the ports of the ejector pump mechanism, respectively. The device according to the present invention can be effectively used as one of the units of a vacuum generator assembly in a compact form in which the fitting bases of the units are arranged adjacent to one another with the inlet and exhaust pipes thereof held communicating with each other, respectively, whereby the number of pipes is minimized and the noise level from the assembly is reduced. The device or the assembly is applicable to a sucking device for attracting and sucking an article so as to transfer it to a required place.

Abstract: The pump comprises a pump body and a volute, mutually complementary with respect to one another, which once assembled form a waterproof container within which a permanent magnet rotor and an impeller are contained respectively in a first and in a second chamber. The stator part of the electric motor is provided externally to said waterproof container, and thus can never be affected by the liquid. The introduced improvements relate to the coupling between impeller and rotor and to the means adapted to make the rotor chamber waterproof, so that there cannot enter therein foreign matter, and in particular metallic dust, which by remaining associated with the permanent magnet of the rotor would prevent the rotation thereof, blocking its operation.

Abstract: This invention comprises a birotational pump for the movement of air fluid through a conventional pumping mechanism. It is comprised of cylindrical piston housing, a pump shaft running through the piston housing, a piston linkage assembly secured to the pump shaft, a pair of valve plates which cover the ends of the piston housing and a cylindrical pump housing surrounding the piston housing to allow for the free movement of the piston and piston linkage. This invention will permit the free flow of fluid or air through the piston housing by creating a suction chamber in the piston housing. The fluid enters the valve plates which contain openings which line up with openings in the piston housing. As the shaft rotates the openings on the first end of the piston housing cease to line up with openings in the piston housing and openings in the second end line up to expel the fluid contained within the chamber of the piston housing cirutier of rotation of shaft can be changed.

Abstract: A self-loading peristaltic pump including a rotor rotatably mounted about a rotor axis, and a race having an internal surface for supporting a flexible tube in a pumping region between the rotor and the race, the surface including points that are at equal radii from the rotor axis in planes that are perpendicular to the rotor axis, the rotor including a roller for intermittently and progressively compressing the flexible tube against the race in the pumping region, the rotor including a radially extending rotor tab located outside of the pumping region for displacing the flexible tube toward the pumping region as the rotor rotates.

Abstract: An apparatus for simultaneously inserting a plurality of slides into a file sheet and a method for using such apparatus is disclosed. The apparatus comprises a series of pockets which align with a series of compartments in a slide structure. Pawl members in the compartments engage with the slides to retain the slides in the pockets. The slide structure moves reciprocally longitudinally, as well as vertically in the plane of the mounting plate.

Abstract: An air pump includes a housing body containing an electromagnetic drive mechanism for oscillating a pair of diaphragms. The diaphragms define variable volume chambers, the chambers communicating with suction and discharge ports for establishing an air flow in response to diaphragm oscillation. The drive mechanism comprises coils defining an air gap and a permanent magnet type actuator reciprocably mounted in the air gap. The top of the housing body is open to enable the actuator to be visually inspected for proper alignment within the air gap. A cover is installed over the open top of the housing body with the actuator properly installed in the air gap. The cover contains air passages communicating with the suction and discharge ports. The weight of the diaphragm can be altered to achieve a desired resonance frequency tuned to the frequency of the electrical current.

Abstract: A hand-held air sampling pump can be operated with one hand to consistently sample an exact, predetermined volume of air by causing a bellows to compress and then elongate to form a vacuum inside of the bellows to draw an air sample through a detector tube and into the bellows.

Abstract: Evaporative cooler pump apparatus includes a generally round housing having a plurality of slots on the bottom of the housing which provides the function of an integral screen for the pump to screen out debris and which provides the function of absorbing vibration or dampening vibration to prevent motor vibration from being transmitted to the evaporative cooler in which the pump is disposed. The pump apparatus further includes a circular housing for the pump motor, and may include a wall above the pump motor separating the pump motor from a blower disposed above the motor. Cooled air is drawn upwardly over the motor and is expelled outwardly.

Abstract: A method and apparatus for controlling the amount of lubricant dispensed in a railway lubricating system wherein a test cycle is effected during which lubricant is dispensed in a test amount to detect the influence of lubricant viscosity on the system, and wherein further dispensing cycles are effected to sequentially dispense an accurate and desired amount of lubricant in conformity with the detected influence of lubricant viscosity.

Abstract: A control system of pumping operation comprises a cycloconverter for converting AC power from a AC power system into AC power having a given frequency, anAC exciting generator-motor, having a stator side electrically connected to the AC power system, having a rotor side electrically connected to the cycloconverter, and having a rotor shaft mechanically coupled to a pump-turbine by which the pumping operation is carried out, a circuit breaker inserted between the AC power system and the AC exciting generator-motor, a rotation speed controller for controlling a rotation speed of the AC exciting generator-motor such that the rotation speed becomes slow when the pumping operation is to be stopped, an AC excitation controller for decreasing a degree of excitation effected by the cycloconverter, wherein decreasing of the excitation degree starts when the rotation speed of the AC exciting generator-motor reaches a given minimum value, and a circuit breaker controller for turning off the circuit breaker when input po

Abstract: A device useful in sorting slides can be constructed so as to include a tray formed of a white polymer material and so as to include a plurality of slide holders pivotally mounted on the tray generally above the bottom of it so that they may be rotated between storage positions in which slides held by the holders are generally parallel to the bottom of the tray and adjacent to the bottom of the tray to a sorting position in which slides held by the holders are located at an angle to the bottom of the tray. Detents are provided for temporarily positioning the holders in the sorting positions. When they are held at an angle to the bottom of the tray slides held by the holders can be viewed as they are illuminated by ambient light. Because of the manner in which the slides are held they may be arranged in any desired manner by moving them to various position in the holders as they are illuminated.

Abstract: In a metal-ceramic combination wherein a monobloc ceramic member comprising a base, a protrusion integrally formed on the base and an easement portion on and around the root of the protrusion, is combined with a metallic member, an improved combination having an excellent strength in total is obtained by fitting the protrusion tightly into a recession or conduit of the metallic member, leaving clearance of 0.5 mm or more between the easement portion and a defined edge of joint interface of the said two members. The combination of the invention is particularly useful for engine parts to be subjected to high temperatures and repeated stresses such as a turbocharger rotor, piston, tappet, rocker arm, exhaust valve, cam and the like.

Abstract: A hydraulically activated diaphragm pump. A pressure source is coupled to a pump diaphragm during a pump discharge stroke. During this discharge stroke, an air activated return assist cylinder is vented to atmosphere. On the return stroke the pump housing above the diaphragm is vented and the air cylinder activated. A single 4-way solenoid actuated valve controlled by an adjustable timer accomplishes this cylic pumping action. The timer is adjustable to set the number of pump cycles per minute and also adjusts the discharge stroke period of each cycle. A pressure regulator adjusts the pressure of air routed through the solenoid actuated valve to provide relatively high pressure air to the diaphragm on the discharge and low pressure air to the air cylinder on the return stroke.