Abstract: A compressor of the rotary type is driven by a motor via a gear wheel arranged on the shaft of the compressor and cooperating with a gear wheel arranged on the shaft of the motor, the gear wheels and the shafts being enclosed in a gear housing. The motor is fastened to a detachable wall part of the gear housing, and the motor shaft is journalled solely in the bearings of the motor and protrudes into the gear housing through an opening in the wall part. The opening is provided with sealing means which prevent a medium from forcing its way out of the gear housing. The gear wheels are accessible for dismantling and assembly when the wall part together with the motor is detached from the rest of the gear housing.

Abstract: A suction port 22a of an end cover 22 and a suction port 21a of a pump casing 21 are disposed to have a certain angular distance from each other, and the end cover 22 is covered by fuel filtration element 23 with a gap against the bottom of the end cover 22, thereby resistance to fire flame ignited by collector of a pump motor becomes large and dangerous spreading of fire flame is prevented.

Abstract: A rotor for a rotary compressor having a metal central portion integral with two opposite end portions that are fiber-reinforced metal matrix composites having a matrix metal common to the central portion. Such rotors may be made by pressing inorganic fibers to form the end portions of the rotor, arranging the end portions in an opposing relationship in a mold to form the central portion between the end portions. Molten metal is placed into the mold such that it infiltrates the porous end portions while forming the central portion. Solidification of the metal forms fiber-reinforced metal-matrix composite end portions integral with the central portion.

Abstract: An apparatus and method for inserting an intra-ocular lens into an eye is disclosed. The apparatus permits the insertion of the intra-ocular lens through small incisions, of the order of several millimeters, such as are employed in the phacoemulsification technique of cataract removal. The intra-ocular lens is placed within a hinged, generally cylindrical load chamber, having a pair of flanges. The load chamber is folded around the intra-ocular lens, so that the lens itself becomes folded or rolled along its length. The load chamber is fitted into an injector portion, which has a slot which is keyed to the flanges of the load chamber. The injector portion and load chamber are then fitted into an insertion cone which defines a lumen for passage of the intra-ocular lens through the lumen. A plunger inserted into the injector portion is used to push the intra-ocular lens through the lumen and into the eye. The folded intra-ocular lens gradually flowers out as it emerges from the distal end of the insertion cone.

Abstract: This invention relates to a pump and hydraulic or pneumatic motor comprising a flexible tubular shell enclosed within a closed rigid cylindrical shell of oblong circular cross section wherein said flexible tubular shell is stretched around four revolving rollers, each pair of said four revolving rollers are diametrically and rotatably disposed about each of two drive shafts located on the plane including the major axis of said oblong circular cross section at two diametrically opposite position with respect to the plane including the minor axis of said oblong circular cross section.

Abstract: A hydraulic system includes a pilot controlled, pressure operated, spool valve (2) which acts substantially as a by-pass valve when regulating supply of fluid to an actuator (8), and as an in-line valve when regulating the return flow of fluid from the actuator (8) to tank. Both these regulating functions are provided by means of a single main valve spool (31). A flow sensor (20) provides negative feedback to the pilot valve in both by-pass and in-line modes of operation of the main valve, which makes the operation of the system substantially independent of load, temperature, and pump flow. If it is essential that the actuator (8), once it has reached a desired level, remains at that level, the system may additionally incorporate a releasable non-return valve (7) in the service line (71) from the main valve (2) to the actuator (8).

Abstract: A pumping system for producing uniform discharge and suction rates includes a pump connected to a supply of hydraulic fluid to deliver hydraulic control fluid at a selectable flow rate to a proportioning valve. The proportioning valve divides the flow of hydraulic fluid into two resulting flows, each of which is utilized via a four-way valve to drive a piston within a hydraulic cylinder. The positions of the pistons within the cylinders are detected and used to control the proportioning valve such that each piston is imparted with a velocity that varies in a sinusoidal manner in response to the hydraulic fluid delivered to it by the porportioning valve. Sensing of the piston positions and control of the proportioning valve may be accomplished mechanically by a system of cams driven by the pistons, or electronically by a microprocessor receiving signals from transducers coupled to the pistons.

Abstract: A controller is disclosed for a plunger lift system for oil and gas wells that monitors the casing pressure, flow line pressure, and battery voltage and overrides the on-time and off-time periods to either shut the well in or open the flow line valve when certain casing or flow line pressures exist or when the battery voltage drops to a preselected minimum.

Abstract: A hydraulic actuated pressure booster unit includes a differential power piston and an integral control valve controlling the pumping direction and action. The control valve has a reciprocally mounted tubular spool member in a cylinder valve body. The spool member has a control passageway and a plurality of spaced spools, one of which mates with the power piston passage to form a first valve for transfer of oil to the pumping chamber and from a transfer chamber to an exhaust passageway. A pair of spaced spools slide in stepped control chamber forming a control bore and exhaust bore connected by the spool passageway to the pumping chamber via the first valve. A sequence valve connects the exhaust bore to the exhaust through a directional control valve. The sequence valve is controlled by the output working pressure. A pilot valve controls the load connection to the one end of the cylinder and a high pressure relief valve limits the total pressure created within the working system.

Abstract: An emergency fuel priming and supply system for engines using a fuel pump and portable fuel can, or pressurized fuel container, for feeding fuel under pressure through a fuel priming line to and through the fuel transfer pump of a diesel (or other fuel) fuel feed system. With one of the alternate approaches the vehicle fuel tank line would be normally disconnected and the emergency fuel line attached for forcing fuel to and through the fuel transfer pump to the engine fuel distribution system. On one approach the fuel priming pump includes clip-ended power lines for convenient connection to a twelve volt battery, or a chargeable power drive tool is used for driving the fuel priming pump. An alternate approach uses a valved pressurized fuel container for forcing fuel to and through the fuel transfer pump.

Abstract: An improved peristaltic infusion pump and disposable cassette for use therewith. The cassette includes a hollow conduit arrangement with a section of elastic tubing and adapted to pass intravenous fluids therethrough. The conduit is fixedly mounted in a rigid cassette wherein an intermediate section of the elastic tubing is free to move in a direction perpendicular to the base of the cassette. The infusion pump includes a pump cassette housing designed to properly align and support the cassette and encloses a pump rotor assembly designed to interface with the elastic tube of the cassette so as to generate a peristaltic force in the hollow conduit arrangement.

Abstract: The membrane of a diaphragm pump is deformable by the reciprocable armature of a cylindrical electromagnet which is installed in the interior of a plastic housing adjacent to a partition which separates the winding or windings of the electromagnet from the casing of the pump and which carries the casing as well as the electromagnet. That section of the housing which surrounds the electromagnet is a relatively thin cylinder having circumferentially extending heat-dissipating ribs and a cylindrical internal surface which defines with the cylindrical external surface of the electromagnet a gap of constant width. The area around the cylindrical section of the housing is unobstructed, and the housing further includes a larger section which is integral with the cylindrical section, which is rigid with a foot extending well below the electromagnet to enhance the stability of the machine, and which confines a control circuit for the electromagnet.

Abstract: In a vane type compressor including a plurality of radial vanes extending from a compressor shaft through the slots in a rotary piston elastic flexible tubes are inserted in the slots and interconnected between the respective vanes and the rotary piston, which serve as sealing members on the vanes. Each flexible tube has an elongated bead engaged in a groove formed either in the vane or in the rotary piston.

Abstract: A fluid flow machine has a diaphragm pump which is driven by an electromagnet and is confined in a pressure-resistant capsule together with the electromagnet as well as with the electronic control unit for the electromagnet. The constituents of the capsule are connected to each other so that they form one or more gaps each having a configuration and dimensions such as to prevent the propagation of flames and/or sparks from the interior of the capsule to the surrounding area. This renders it possible to use the machine in an explosive atmosphere, even if the pump is designed to deliver metered quantities of flammable fluids. A gap of the above outlined character is provided between two portions of the capsule where a reciprocable plunger extends toward the diaphragm.

Abstract: A submergible motor pump assembly is disclosed which is arranged to be easy to access to any part of the assembly with dismantling minimum elements, i.e. without requiring disassembly of the whole and without requiring discharging lubricating oil for a mechanical seal. Also, plural balance holes are provided in the main plate of the impeller and a liner ring is disposed between the main plate and the top wall of the impeller chamber to establish the flow passage from the tip of the impeller blades through the gap between the main plate and the top wall of the chamber to the balance holes with flow restricted zones by the liner ring.

Abstract: A valve plate, inserted between the cylinder body and head parts of a compressor, holds the usual compression valve, which opens to connect the compression and pressure chambers during the compression stroke of the piston, and the suction valve which opens to connect the suction and compression chambers during the piston intake stroke. A separate plate-type idle valve also within the plate is positioned to open into a recess of the compression chamber so that there is no interference with the movement of the piston. The idle valve is controlled by an idle piston actuated by pressurized air admitted through a pressure regulator which opens when the reservoir pressure exceeds a predetermined level. Opening the idle valve shifts the compressor operation from compression to idle condition by permitting unhindered passage of air between suction and compression chambers.

Abstract: A material handling device such as a pump, including a first housing part 12 having an internal surface 12A surrounded by a peripheral surface 12B, 12C facing in generally the same direction as the internal surface. A substantially longitudinally inextensible flexible diaphragm has its periphery clamped on the first clamping surface by a cooperating second clamping surface 16B, 16C, the second housing part 16 which carries a rotary member 17 on which are mounted three rollers 18. A chamber 10 is formed between the diaphragm and the internal surface.Upon rotation of the rotary member, the rollers sequentially urge the diaphragm onto the internal surface to form a constriction which traverses the chamber and moves the constriction from one port 13 to another port 14 formed in the first housing part.

Abstract: A fluid pumping system including a variable-volume, fluid-reception chamber having an inlet conduit leading from a fluid supply site and an outlet conduit leading to a fluid delivery site. An elongated plunger body is drivingly coupled with the chamber and linearly reciprocable along its longitudinal axis so as to alternately expand and contract the volume of the chamber, thereby alternately drawing a fluid into the chamber through the inlet conduit from the fluid supply site and pumping the fluid through the outlet conduit towards the delivery site. The linear reciprocation of the plunger body is effected by an electromagnetically operated drive, preferably a linear motor drive, at a rate of reciprocation in the range of 0.01 to 10 Hz.

Abstract: A sealed type electrically operated compressor including a sealed container, and a pair of scroll members in the sealed container each having an end plate and a spiral wrap located in upright position thereon. The orbiting and the stationary scroll members are assembled with the respective wraps facing inwardly and meshing with each other, and the orbiting scroll member is rotated by an electric motor to move in orbiting movement to compress fluid in compression spaces defined by the two scroll members and discharge compressed fluid into a space in the container. A suction pipe defining a suction passage for the fluid to be led therethrough into the compression spaces extends at one end portion through the end plate of the stationary scroll member to open in a suction space defined by the two scroll members and extends at the other end portion through a wall of the sealed container axially to communicate with external equipment on the lower pressure side.

Abstract: An improved pump assembly includes a plurality of pumping elements which rotate with a rotor and engage an inner surface of a cam ring to define pumping chambers which hold liquid and/or air. As the pumping chambers move along an inlet arc, liquid flows through an orifice to the chambers. The orifice restricts the rate of flow of liquid to the pumping chambers to a flow rate which is insufficient to fill the chambers with liquid during high speed rotation of the rotor. As the pumping chambers move along an outlet arc which has a constant slope toward the rotor, the volume of each pumping chamber is decreased. When the fluid pressure in the pumping chamber exceeds a pump discharge pressure, one of a series of a check valves opens and fluid is discharged from the pumping chamber.