Abstract: A gas transfer and depressurization system that is configured to transfer gas from a first location to a second location wherein during the transfer of gas the pressure of the first location is reduced. The gas transfer and depressurization system includes a drive chamber having an interior volume with a drive assembly movably disposed therein. A first cylinder and a second cylinder are operably coupled to the drive chamber on opposing sides thereof. The drive assembly includes a drive rod having portions extending into the first cylinder and second cylinder wherein the drive rod has pistons formed on opposing ends thereof. A controller is operably coupled to a compressed air source and is configured to provide compressed air into said drive chamber so as to reciprocally move the drive assembly. Gas blocks and coupling block are additionally present and facilitate flow of gas intermediate the first and second cylinders.

Abstract: A gas compression system may include a gas compressor having a compressor rod, a piston, and an interior chamber. The gas compressor may receive a process gas at a first pressure, pressurize the process gas via the piston, and output the process gas at a second pressure higher than the first. Additionally, an internal combustion engine coupled to the gas compressor may, during operation, actuate the compressor rod and generate exhaust gas. The gas compression system may also include a packing case, disposed around the compressor rod and fluidly coupled to the interior chamber. The packing case may receive and direct the exhaust gas to counter a flow of the process gas through the packing case from the interior chamber.

Abstract: A high pressure gas lift compressor system and method of using the system for supplying compressed gas to multiple wells are provided. The system includes a compressor having multiple compressor cylinders. Each cylinder has its own gas inlet line and dedicated gas outlet line that supplies compressed gas from that cylinder directly to a wellbore to provide artificial gas lift. Each cylinder also has its own control valve upstream of the cylinder to control the suction pressure to the cylinder. A desired gas flow rate to each well may be input, and the control valve is adjusted accordingly to achieve the flow rate. By inputting a flow rate for each separate cylinder, the flow rate to each well may be independently controlled.

Abstract: A double-acting pump device includes a piston arrangement being slidably arranged in a pump housing. The pump housing is separated into a drive section with a drive fluid inlet and a drive fluid outlet and a pump section with an inlet and an outlet for a pump fluid. The drive section includes a switch mechanism which utilizes the difference between the drive fluid supply pressure and the drive fluid outlet pressure to reciprocate the piston arrangement, such that axially acting forces are transferred to the pump fluid which thereby achieves a desired pressure increase. Thus, the double-acting pump is arranged to utilize the energy in a supplied drive fluid to provide a defined pressure increase in a supplied pump fluid.

Abstract: A high pressure gas lift compressor system and method of using the system for supplying compressed gas to multiple wells are provided. The system includes a compressor having multiple compressor cylinders. Each cylinder has its own gas inlet line and dedicated gas outlet line that supplies compressed gas from that cylinder directly to a wellbore to provide artificial gas lift. Each cylinder also has its own control valve upstream of the cylinder to control the suction pressure to the cylinder. A desired gas flow rate to each well may be input, and the control valve is adjusted accordingly to achieve the flow rate. By inputting a flow rate for each separate cylinder, the flow rate to each well may be independently controlled.

Abstract: A high pressure gas lift compressor system and method of using the system for supplying compressed gas to multiple wells are provided. The system includes a compressor having multiple compressor cylinders. Each cylinder has its own gas inlet line and dedicated gas outlet line that supplies compressed gas from that cylinder directly to a wellbore to provide artificial gas lift. Each cylinder also has its own control valve upstream of the cylinder to control the suction pressure to the cylinder. A desired gas flow rate to each well may be input, and the control valve is adjusted accordingly to achieve the flow rate. By inputting a flow rate for each separate cylinder, the flow rate to each well may be independently controlled.

Abstract: The disclosure relates to a flow cytometer arrangement, in which a sample is mixed with a colorant by means of two pumps and the mixture is introduced together with a sheath flow into a flow cell.

Abstract: A gas transfer and depressurization system that is configured to transfer gas from a first location to a second location wherein during the transfer of gas the pressure of the first location is reduced. The gas transfer and depressurization system includes a drive chamber having an interior volume with a drive assembly movably disposed therein. A first cylinder and a second cylinder are operably coupled to the drive chamber on opposing sides thereof. The drive assembly includes a drive rod having portions extending into the first cylinder and second cylinder wherein the drive rod has pistons formed on opposing ends thereof. A controller is operably coupled to a compressed air source and is configured to provide compressed air into said drive chamber so as to reciprocally move the drive assembly. Gas blocks and coupling block are additionally present and facilitate flow of gas intermediate the first and second cylinders.

Abstract: Systems, methods and devices for optimizing bi-directional piston movement within a device or system used to compress and/or expand a gas, such as air, are described herein. In some embodiments, a compressed air device and/or system can include a first pneumatic cylinder, a second pneumatic cylinder, a hydraulic actuator, and a hydraulic controller. The first pneumatic cylinder has a first working piston disposed therein for reciprocating movement in the first pneumatic cylinder and the hydraulic actuator is coupled to the first working piston. The second pneumatic cylinder has a second working piston disposed therein for reciprocating movement in the second pneumatic cylinder. The hydraulic controller is fluidically coupleable to the hydraulic actuator and is operable in a compression mode and an expansion mode.

Abstract: A reciprocating-piston compressor having at least two working cylinders arranged in series, along a cylinder axis is described. The compressor includes a piston in each of the cylinders, guided in an axially movable manner, and a common axially actuated piston rod of the pistons, extending through a passage opening in a partition between the at least two working cylinders. The at least two working cylinders are sealed off with respect to one another in a region of the common axially actuated piston rod, exclusively by a non-contact seal. The axial seal has an axial gap seal formed between a radially outer circumferential surface of the common axially actuated piston rod and a radially inner circumferential surface of the passage opening.

Abstract: The high-pressure generation device (110) comprises three pressure chambers which pressurize liquid drawn from the outside through the pumping operation of a plurality of pistons (1) having different outer diameters, pressurizes the liquid drawn from the outside, and discharges the liquid pressurized to a constant pressure to the outside in each reciprocating operation of the plurality of pistons (1). The three pressure chambers comprising a first pressure chamber (31) which draws liquid from the outside, a second pressure chamber (32) of which the pressurizing area for pressurizing the liquid is smaller than that of the first pressure chamber (31), and a third pressure chamber (33) of which the pressurizing area is smaller than that of the second pressure chamber (32) and which discharges liquid to the outside.

Abstract: An expansible chamber pneumatic system, for example a fluid pump system, includes two or more double-acting diaphragm pumps, each with symmetrical left and right pump housings, each housing including an air chamber and a fluid chamber separated by a movable diaphragm. The diaphragms are connected for reciprocating movement in unison to pump fluid through their respective fluid chambers. Each pump includes an air valve actuated by Control air to direct Process air into one of the air chambers, simultaneously releasing used Process air from the other air chamber to thereby move the diaphragms, thereby to pump fluid. A pilot valve directs Control air to the air valve to position the air valve. The pilot valve is responsive to diaphragms reaching their travel limit in one direction to direct Control air to reverse the directions of Process air flow through the air valve to thereby reverse the movement of the pump diaphragms. Control air exhausts through the pilot valve to atmosphere.

Abstract: A vacuum pump, comprising at least one pump chamber (7, 8, 23 to 26) and at least one chamber (3, 5, 27) adjoining the pump chamber. The vacuum pump is fitted with a gas ballast device to avoid damage being caused in the adjoining chambers by the gases being pumped, the ballast gas being delivered via the chamber adjoining the pump chamber.

Abstract: A multistage vacuum pump is achieved by utilizing a single piston and cylinder assembly having opposite end portions with substantially equal diameters and an enlarged diameter central portion. One end of the cylinder is closed by a valve and a first stage pumping chamber is defined between the valve and the piston. The enlarged diameter portion of the piston has an axial extent less than the axial extent of the enlarged diameter portion of the cylinder to define second and third stage pumping chambers on opposite sides of the enlarged diameter portion of the piston. The three pumping chambers are interconnected by passage means to an inlet and outlet to provide a sequential reduction in pressure. A single drive unit may be connected to a plurality of pumping units for reciprocating the piston in each pumping unit.

Abstract: A high pressure fluid pumping transformer apparatus has a cylindrical transformer body surrounded by an outer pressure sleeve defining an annular working fluid chamber substantially surrounding the transformer body which receives fluid from an external source. The interior of the transformer body is divided into a central exhaust chamber and axially spaced working chambers at each end thereof. High pressure cylinders mounted in the transformer body at the end of each working chamber have a high pressure chamber spaced axially outward of the working chambers which contains a suction valve. Discharge valves mounted in the outer ends of the transformer body each contain a discharge valve and discharge port. An exhaust outlet extends from the exhaust chamber and is isolated from the working fluid chamber. A plunger reciprocally mounted in the transformer body has a portion which reciprocates in the working chambers and a reduced diameter at each end which reciprocates in the high pressure chambers.

Abstract: An evacuation apparatus comprising (1) a reciprocating vacuum pump, the piston rings and piston shaft sealing material of which are made of a self-lubricating material at least on the surface and in which metallic bellows is or are used to seal between the piston shaft outside the cylinder and the outer face of the cylinder end wall, and (2) a turbomolecular pump in which a casing, stationary blades mounted on the casing, a rotor, and moving blades provided on the rotor are arranged coaxially, and in which the delivery opening of the reciprocating vacuum pump is open to the atmosphere and the suction opening of the turbomolecular pump is joined to an apparatus to be evacuated.

Abstract: A vacuum pump includes two pairs of piston and cylinder assemblies mounted on opposite sides of a crankshaft in a common plane with the gas inlets for the first and second cylinders of a first pair of piston and cylinder assemblies being connected to the device to be evacuated and the gas outlets thereof being connected to a common outlet having a spring biased one-way valve controlling the outlet and to a passage connected to the inlet of a third cylinder in said second pair of piston and cylinder assemblies. The gas outlet of the third cylinder is connected to the inlet of the fourth cylinder and the gas outlet of the fourth cylinder is connected to the common outlet through spring biased one-way valves.

Abstract: The invention comprises a system and method for providing compressed gas by extracting compressed gas directly from the combustion chamber of an internal combustion engine. The gas may be further compressed using an improved compressor, which in turn may be ultimately powered by the engine from which the gas is extracted. The compressor is preferably an axial drive, hydraulic compressor, with the engine being used to drive a pump which in turn provides the direct hydraulic driving force for the compressor.

Abstract: A reciprocatory piston and cylinder machine particularly suitable for use as a vacuum pump includes a cylinder (17), a cylindrical piston (16) relatively slidably reciprocable within the cylinder (17), and means for substantially sealing the annular space between the piston (16) and cylinder (17) in lieu of oil or other liquid lubricant. The sealing means comprises a sleeve (102) of a low-friction material disposed under circumferential tension, and preferably also under longitudinal tension, on the cylindrical surface of the piston (16). Also disclosed is a reciprocatory piston and cylinder machine of particular prior construction having a one-way valve (42) in an exhaust port (30) ahead of a head portion (24) of the piston (16). The arrangement is such that, as the front face of the piston head portion (24) approaches the closed cylinder end (52), the piston head portion 24 physically moves the one-way valve (42) so as to open the exhaust port (30).

Abstract: Apparatus and method are provided for the precisely controlled and coordinated supply of sample and sheath stream fluids to a sheath stream flow cell, and comprise the use of positive displacement differential pumping means which are operable to insure consistent sample and sheath stream fluid diameters, velocity and volume flow conditions within the flow cell, thereby maximizing the accuracy and reproducibility of successive analyses.

Abstract: An air compressor with a cylinder (1) has a stepped piston (4) movably disposed therein which performs compression in both stroke directions to provide two-stage compression. Each compression stage is associated with at least one inlet and outlet valve (34, 36 or 35, 37), whereby one outlet opening (22) of a lower compression stage is connected with an inlet opening (20) of a higher compression stage. All valves (34-37) are disposed on the upper side of the compressor in the vicinity of the cylinder head (13; 30). The compressor has few individual parts and the valves are easily accessible for maintenance.

Abstract: The present invention is a liquid pumping system with constant flow rate. The system contains at least one first cylinder means and reciprocating piston means defining a first pumping capacity (V.sub.1), at least one second pumping unit including cylinder means and reciprocating piston means defining a second pumping capacity (V.sub.2) and at least one complimentary pumping unit including cylinder means and reciprocating piston means defining a complimentary pumping capacity (V.sub.0) the driving means for actuating the piston means synchronously but in phase opposition between the piston means of the first unit and the second and complimentary pumping units in such a manner that each piston performs alternating suction and discharge strokes linearly having feed lines and check valves wherein V.sub.1 equals V.sub.2 plus V.sub.0.

Abstract: A tandem piston arrangement for a compressor, especially for a dry-running compressor for the high pressure compression of gases such as oxygen, has one piston of the common rod form as a guide piston with piston and guide rings in engagement with the respective cylinder, and at least one other piston as a contactless piston. By thus moving the guide point of the rod with the contactless piston, the length of any vibratile portion of the rod carrying the contactless piston remains constant during reciprocation of the assembly and the vibratile natural frequency thus does not change during operation.

Abstract: A Scotch yoke mechanism for actuating opposed-piston gas compressor is disclosed. The mechanism comprises a crank pin eccentrically extending from an end of a main drive shaft, a slider rotatably surrounding the crank pin, and a yoke defining a pair of opposed parallel sliding surfaces for confining the motion of the slider only to the sliding motion along the surfaces, said yoke further defining a pair of outwardly extending connecting rods for connecting oppositely disposed pistons on either side of the york, whereby the orbital motion about the axis of the main drive shaft causes the slider to reciprocate the yoke and thus oppositely disposed pistons.

Abstract: Disclosed herein is a two-stage fluid pump comprising a base member defining a sump, a first fluid pumping unit including a pumping piston and supply and discharge passages, a second fluid pumping unit including a pumping piston and supply and discharge passages, a plate member fixed on the sump and having mounted thereon the first and second fluid pumping units, the plate member including a conduit communicating with the first unit discharge passage and with the second unit supply passage and a discharge conduit communicating with the second unit discharge passage and terminating in a discharge port in the plate member, a drive engaged with the pistons for effecting reciprocation thereof and including an electric motor mounted on the plate member and including an output shaft, a drive member mounted on the plate member for rotation and having an eccentric portion drivingly connected with the pistons to effect reciprocation thereof in response to rotation of the drive member, and a speed reducing mechanism op

Abstract: A two-stage pump for LPG having two chambers, a valve communicating with the first chamber for the admission of the liquid to be pumped; a second valve communicating with the second chamber for the delivery of the pumped liquid. A transfer duct connects the two chambers and is fitted with a check valve to prevent the return of liquid from the second chamber to the first. Each chamber comprises a wall formed by a diaphragm freely deformable in such direction as to increase the volume of the chamber under the effect of the pressure of the liquid, and operably deformable in the opposite direction under the action of actuating means acting alternately on the diaphragms of both chambers. The floating diaphragms prevent the vaporization of the liquid that would arise with a suction pump, as well as the cavitation that would ensue.

Abstract: A solvent delivery system which provides a substantially uniform flow includes two synchronized pistons adapted to serially transport successive solvent compositions from one piston to the other prior to delivery to a chromatography column.

Abstract: A multistage resonant reciprocating compressor having opposed cylinders that are driven by a plunger unit. The plunger unit is suspended between a pair of spaced apart flexure springs and is electrically coupled to a linear motor mounted between the springs. The forces acting on the cylinder piston located on one side of the plunger unit are balanced against the piston forces acting on the other side of the unit and the stiffness of the flexure springs arranged so that the natural frequency of the plunger is at or near the exciting frequency of the motor.

Abstract: The cylinder of a reciprocating compressor is provided with a flanged collar defining an annular recess adjacent the side walls of the cylinder bore disposed for entry of the piston skirt during the downstroke into the recess, compressing gas therein. Communication is provided between the recess and the space above the piston and cylinder head, increasing the initial pressure above the piston and causing greater pressure to be developed during the compression stroke. The result is an increase in the volumetric efficiency of the compressor.

Abstract: A double acting multistage hydraulically driven gas compressor using a free floating piston including a hydraulic piston and a number of gas compressing pistons, those gas compressing pistons being sealed by high pressure oil supplied from the hydraulic drive stage.

Abstract: A double acting multistage hydraulically driven gas compressor using a free floating piston including a hydraulic piston and a number of gas compressing pistons, those gas compressing pistons being sealed by high pressure oil supplied from the hydraulic drive stage.

Abstract: A double acting hydraulically driven gas compressor using a free floating piston the reciprocating action of which is being controlled by a valve system responsive to pressure peaks, generated in hydraulic system on piston reversal, the pressure level of those peaks being higher by a constant pressure differential than the discharge pressure of the gas compressor.

Abstract: A multi-stage pumping assembly comprising a plurality of pumping units arranged end to end in an elongate cylindrical housing. Each pumping unit comprises a solenoid which when energized causes a pumping piston to retract downwardly on its intake stroke, and when de-energized permits a tension loaded rubber sleeve element to pull the piston upwardly on its discharge stroke. Each of the solenoids is energized in sequence so that the pumping pistons move through their pumping cycles in a sequential pattern. In pumping against lower pressures, each piston is able to move through a longer path of travel on its discharge stroke to effect a higher volumetric flow of liquid. When working against higher head pressures, the pressure exerted by the several pumping pistons, working cumulatively effects a lower volumetric flow of fluid at a higher pressure.

Abstract: A supply pump comprising a body having an inlet and an outlet both in fluid communication with an interior region of the body which contains two pistons positioned to reciprocate coaxially and which define three variable volume chambers, one between the two pistons and in fluid communication with the inlet, a second between one piston and the outlet and a third between the other piston and the outlet. The pistons have different working areas, and the piston of larger area carries a check valve which allows fluid flow from the chamber between the pistons to the chamber between the larger piston and the outlet. A regulating spring acts between the body and the smaller piston to urge both pistons against a mechanical drive means including a reciprocable rod carried by a tappet contacting a driven cam. During each forward and reverse stroke of the pistons in response to rotation of the cam, supply fluid is drawn into the pump through the inlet and forced out of the pump through the outlet.

Abstract: A compact fluid compressor embodying a housing formed of a plurality of stacked sections with relatively large fluid flow passageways cast therein and wherein the overall outline of the compressor's housing is substantially rectangular. This arrangement eliminates numerous external piping and the connections needed therefor, found in prior art compressors, and provides a lightweight and good appearing compressor as well as a highly efficient one. The small size, considering the horse power thereof, is due in part to the utilization therein of the Braun mechanism, a counterbalancing and anti-vibration drive mechanism between the power means and the compressor piston or pistons, which mechanism is fully disclosed in Braun U.S. Pat. No. 3,861,222. Even in the two-stage embodiment of the compressor, an inter-cooler, an after-cooler and an inlet fluid (air) filter lie within the above-mentioned outline.

Abstract: A gas compressor or blower comprising a cylinder having gas intake and exhaust ports; a piston which is rotatably and reciprocably movable in the cylinder; valve means for admitting gas into and exhausting air from at least one chamber lying to one side of the piston; a piston shaft to which the piston is secured, the piston shaft passing through seals at the axial ends of the cylinder; means for applying a rotary drive to the piston rod; and a cam arrangement for causing reciprocation of the piston rod as this rotates; wherein said cylinder has an end piece at each end thereof; a set of at least three equiangularly spaced follower assemblies is mounted on an axially outer face of each said end piece, and said piston shaft is supported for rotation by two spaced bearing assemblies, one adjacent to each end of said cylinder and supported by a respective set of said follower assemblies such that each said bearing may move axially relative to said follower assemblies.