Abstract: A pump drive head includes a housing, and a main shaft carried on upper and lower bearings disposed in the housing. The main shaft includes an outer torque tube and a liner tube. The outer and liner tubes abut along a first portion of their length and are separated along a second portion of their length forming a double wall with an elongate tubular space in between. A standpipe is coupled at one end to the housing, below the lower bearing, and received by the elongate tubular space an eliminates the need for a lower seal on the main shaft. A hydraulic pump includes a hydraulic pump chamber displosed in the housing and communicating with the main shaft, and first and second gears disposed in the hydraulic pump chamber and the first gear coupled to the main shaft. The second gear intermeshes with the first gear. A suction port is located between the first and second gears and operable when the main shaft is rotated in a reverse direction from the normal pumping direction, during a condition known as backspin.

Abstract: A miniature blower assembly includes a base plate, a circuit board, a coil seat, a blower, and an upper lid. The base plate includes an air outlet and a spiral air passage communicated with the air outlet. The base plate further includes a recessed area, a bottom wall which defines the recessed area including a peg formed thereon. The circuit board is received in the recessed area of the base plate and includes a sensor element and a plurality of control elements mounted thereon. The coil seat is engaged on the peg on the base plate and includes an axle tube and a winding wound therearound. The blower includes a shaft rotatably received in the axle tube. The upper lid is releasably engaged with the base plate and includes an inlet opening communicated with the spiral air passage.

Abstract: The invention relates to the field of jet technology. After the required pressure of the gaseous medium at the gas inlet of a liquid-gas jet apparatus is obtained, the ratio of the liquid pressure in the nozzle of the jet apparatus to the pressure at the outlet of the jet apparatus is reduced in magnitude. Such ratio is reduced in magnitude down to the value at which an abrupt increase of gas pressure occurs at the gas inlet of the jet apparatus. This value of the ratio is fixed or determines the minimum value for such ratio. Then the final value of the ratio of the liquid pressure in the nozzle of the jet apparatus to the pressure at the outlet of the jet apparatus is set. The final value of the ratio must be greater than the fixed one. The process provides an increased efficiency for a liquid-gas jet apparatus.

Abstract: The invention relates to the field of petrochemical industry. The essence of the invention: is a vacuum-producing device, comprising a liquid-gas jet apparatus, a separator and a pump, is furnished with a mixer. The gas inlet of the liquid-gas jet apparatus is connected to the pipeline for export of a gas-vapor phase from a rectification column, the liquid inlet of the liquid-gas jet apparatus is connected to the discharge side of the pump, the outlet of the liquid-gas jet apparatus is connected to the separator, the gas outlet of the separator is connected to consumers of compressed gas, the outlet of the mixer is connected to the suction side of the pump, the inlet of the mixer is connected both to the pipeline for export of a liquid faction from the rectification column and to the liquid outlet of the separator. The offered jet pump vacuum-producing unit is more effective, more capable and less harmful to the environment in comparison to existing units.

Abstract: An electronic control system is disclosed to control and to prevent damage to a standalone or a network of oil free, two stage compressor packages. The electronic control system uses pressure and temperature sensors to detect actual shutdown conditions or predict shutdown conditions based on the operating state of the compressor package and the current temperatures or pressures of the air at strategic locations in the compressor package. It has been determined through experimentation that, if the pressure at the inlet of the stage two compressor is less than the discharge pressure of the stage two compressor by more than an allowable value, then a high temperature condition will occur in the stage two compressor and cause the compressor to seize.

Abstract: A positive-displacement pump includes multiple pumping elements, each pumping element having a pressure vessel with a first and a second chamber and a separating member disposed between the first and second chambers. The first chambers and the second chambers are hydraulically connected to receive and discharge fluid, wherein the separating members move within the pressure vessels in response to pressure differential between the first and second chambers. A valve assembly having suction and discharge valves communicates with the first chambers. The suction and discharge valves are operable to permit fluid to alternately flow into and out of the first chambers. A hydraulic drive alternately supplies hydraulic fluid to and withdraws hydraulic fluid from the second chambers such that the fluid discharged from the first chambers is free of pulsation.

Abstract: A fluid compressor that includes a compressor base; a compression module fixed to the base; and a compressor control device, such as a compressor starter box, fixed to the base; where the compressor base includes means for moving the compressor starter box toward and away from the compression module while the compressor starter box is attached to the base.

Abstract: A device for pumping an absorbent solution from the low pressure side of an absorption heat exchange system to the high pressure side of that system without relying on pressure from the low pressure side. The device preferably includes a diaphragm pump disposed in an absorbent fluid pathway to pull absorbent solution from the low pressure side and to push absorbent solution into the high pressure side. The diaphragm of the diaphragm pump is powered by a piston-driven hydraulic pump which pushes and pulls oil into and out of the diaphragm pump. The hydraulic pump preferably has sufficient power to pull absorbent solution from the low pressure side of the heat exchange system without relying on any pressure from the low side. Check valves are used to permit the one-way flow of absorbent solution from the low pressure side to the high pressure side of the system.

Abstract: The invention relates to a fuel delivery pump for a fuel injection pump for internal combustion engines, with a pair of rotating displacing elements, which deliver fuel from an intake chamber connected to a storage tank, along a supply conduit that is formed between the end face of the rotating displacing elements and the circumference wall of the pump chamber, into a pressure chamber connected to the fuel injection pump, and with a bypass conduit, which is integrated into a housing of the fuel delivery pump and connects the intake chamber to the pressure chamber, and which is opened by means of a pressure valve disposed in it, wherein the intake chamber is closed with a check valve that operates counter to the fuel delivery direction.

Abstract: A bearing configuration for use in electrical submersible pumps having improved stability. The bearing configurations include multi-lobed bearings, such as lemon bore, tri-lobe bearings, pocket bearings and tilting pad type bearings.

Abstract: A fuel delivery pump for a fuel injection pump for internal combustion engines, which includes a pair of gears that mesh with each other and are driven to rotate in a pump chamber. The gears deliver fuel from an intake chamber connected to a storage tank, along a supply conduit that is formed between the end face of the gears and the circumference wall of the pump chamber, into a pressure chamber connected to the fuel injection pump. A conduit is integrated into a housing of the fuel delivery pump and connects the intake chamber to the pressure chamber. The conduit can be opened by means of a pressure valve disposed in it, wherein the pressure valve is functionally connected to a throttle valve that throttles the fuel supply into the intake chamber as a function of the controlled pressure on the control valve via the pressure chamber.

Abstract: A pump inlet stabilizer for positive displacement reciprocating pumps, which reduces pressure fluctuations at the pump inlet and aids in filling the pump head with fluid during each inlet stroke. The pump inlet stabilizer comprises an accumulator housing with a bladder which creates a gas chamber which is fludically isolated from a fluid chamber within the housing, and a control unit. The control unit consists of a compound pressure gauge to measure positive and negative pressure levels in the gas chamber, a ball valve with an open and closed position for opening or closing an inlet into the gas chamber and a venturi pneumatically coupled to a compressed air source. The control unit is able to use the compressed air source, typically shop air, either to reduce the pressure in the gas chamber or increase the pressure in the gas chamber, depending upon whether the outlet of the venturi is blocked or unblocked.

Abstract: A hydraulic refill valving apparatus can be removed from the front of a metering pump without requiring the entire displacement chamber to be removed from the pump drive mechanism. The valving apparatus separately mounts a mechanically actuated refill valve and a refill check valve such that they can be removed from the front of the pump with relative ease, leaving the displacement chamber connected to the drive mechanism with the sealing gasket therebetween. By separating the refill valve and refill check valve functions into two separate assemblies, the apparatus is made more reliable in that it is less susceptible to problems encountered with relatively high viscosity working fluid.

Abstract: An intensifier pump for a water jet pump includes an exterior cylinder having a fluid inlet port and a fluid outlet port. A valve is disposed at the fluid outlet port. The intensifier pump includes a piston head and a plunger disposed within the exterior cylinder and which is driven by fluid entering the inlet port. An interior cylinder is disposed within the exterior cylinder. A piston having an anterior plunger is disposed within the interior cylinder and is driven by the plunger for compressing a fluid in a compression chamber to flow through the valve. A ceramic liner is disposed within the interior cylinder and circumferentially disposed around the compression chamber.

Abstract: A scroll-type machine is disclosed which is particularly well suited for use as a compressor in refrigeration and air conditioning systems and incorporates a unique arrangement for modulating the capacity thereof. In one group of embodiments the capacity of the scroll-type machine is modulated by relative axial movement between the scroll members so as to form a leakage path across the wrap tips and opposed end plates. In another group of embodiments, modulation is achieved by reducing the orbital radius of one of the scroll members to thereby form a leakage path across the flank surfaces of the wraps. In the second group, a plurality of pin members are moveable from a first and second positions. In a first position the plurality of pin members operably enable the scroll members to orbit and in a second position the pin members restrict the orbiting motion of the first scroll members.

Abstract: A solar-powered reciprocating pump for submersible use in a well, such as a water well. The pump has a pumping section with a plunger therein. The pump also has a drive section with a rotating output shaft and a transmission section which converts the rotating output of the shaft into reciprocating motion of the plunger. In one embodiment, the transmission comprises a gear train. In a second embodiment, the transmission comprises a ball screw which is actuated by a reversible motor. In a third embodiment, the transmission comprises a reversible ball screw which provides reciprocating action in response to rotation of a shaft in a single direction. The pumping section comprises an outer case portion with a cylinder disposed therein such that an annular volume is defined therebetween. A system of flow passageways and inlet and outlet valves provide for pumping liquid into and out of the pump in response to movement of the plunger in both upward and downward directions.

Abstract: The present invention relates to an oil level sight glass for a compressor. The oil level sight glass is at an angle relative to a longitudinal housing axis, such that it can be rotated to achieve an improved position for seeing the sight glass. The sight glass housing further includes an oil return valve which permits return of oil into the oil sump through the sight glass housing.

Abstract: A rotor for a liquid ring machine having a plurality of vanes connected to the rotor hub and a support disk, with the rotor hub face and the support disk back side having sealing surfaces. Recesses with formed edges, capable of scraping off material deposits, are located on the rotor hub face and the support disk back side.

Abstract: A piston pump for a slip-controlled motor vehicle brake system, with a piston which, by means of a piston restoring spring, is pressed with an end face that constitutes a strike face against a circumference of a cam. The cam is driven to rotate, wherein the cam is used to drive the piston in a reciprocating stroke motion. In order to be able to inexpensively manufacture the piston as an injection molded part made of plastic, the piston is provided with a cam strike piece made of wear resistant material on the strike face which is in contact with the cam.

Abstract: An air pumping station for a pneumatic toy vehicle powered by a re-fillable compressed air bottle or canister includes a stabilizing base having a flat ground engaging horizontal lateral bottom including a horizontal projecting geometry proportioned for placement under the feet of the user. The station also includes a fluid-tight vertical cylindrical housing. The station includes a reciprocating piston having a first end in fluid tight relation to interior walls of the housing and a second end defining hand-grippable pumping handles. The station has an air intake valve for the cylindrical housing. The pumping station includes an element for selectable clamping and unclamping of the toy vehicle to at least a first surface of the cylinder, however offset therefrom by a sufficient distance to avoid the reciprocal movement of the piston and grippable pumping handles. The cylinder includes an air exhaust aperture in fluid communication with the base of the cylinder.