Abstract: Devices and methods for operating a diaphragm compressor system provide high output pressure and high throughput. In some embodiments, modular diaphragm compressors are stacked with a clamping mechanism pressing the compressor modules together. In embodiments, multiple stacks are provided as stages of a pressurization process. In embodiments, a main stage valve controls one or more pressure circuits for one or more hydraulic actuators of compressor modules. In embodiments, orifices configured for damping are incorporated to control actuator piston movement within a compressor module.

Abstract: A diaphragm pump mechanically operable air pressure regulator assembly that is operable in direct response to the relative operation of an associated diaphragm pump system. The regulator assembly includes a housing that is constructed to receive a static air pressure signal. A cam arrangement is disposed in the regulator housing and is constructed to mechanically cooperate with a shaft of a respective diaphragm pump system. Axial translation of the shaft of the diaphragm pump system effectuates rotation of the regulator cam arrangement. The relative motion of the cam arrangement with respect to the regulator housing manipulates a force associated with a biasing device disposed in the regulator and thereby the relative degree of the static air pressure signal that is communicated to the respective diaphragm pump system.

Abstract: Multiple diaphragm pumps are known in the art that are operated by compressed air and in which the valves are controlled by a slide element. The slide element is magnetically actuated without mechanical engagement involved in the actuation. This has the consequence that only a small amount of force can be applied which may not be sufficient due to static friction of the valve seal. The invention presents a hybrid solution which facilitates a mechanical actuation of a valve piston provided for valve control as well as a magnetic overcoming of a dead center that may be reached by the valve piston and the diaphragm piston that actuates the diaphragms of the multiple diaphragm pump.

Abstract: Methods, apparatus, and systems are provided for detecting and removing microplastics from wastewater effluent. Both, automatic/remote and manual monitoring and sampling components are included to detect the presence of microplastics. The automatic monitoring and sampling component includes a TSS sensor and associated apparatus calibrated to account for non-plastic solids present in the wastewater and, thereby, more accurately determine the presence of microplastics. Efficient separation and removal of microplastics from wastewater effluent is performed by a specialized capture net apparatus having multiple sized mesh components and optional diffuser devices which perform size exclusion filtration of microplastics from the water.

Abstract: Devices and methods for operating a diaphragm compressor system provide high output pressure and high throughput. In some embodiments, modular diaphragm compressors are stacked with a clamping mechanism pressing the compressor modules together. In embodiments, multiple stacks are provided as stages of a pressurization process. In embodiments, a main stage valve controls one or more pressure circuits for one or more hydraulic actuators of compressor modules. In embodiments, orifices configured for damping are incorporated to control actuator piston movement within a compressor module.

Abstract: Oil and gas companies worldwide strive to improve artificial lift efficiencies to minimize environmental footprint and lower operational expense. In order to lower artificial lift costs, the traditional rod pump must be replaced and improved upon. The present invention of the rodless pump and multi-sealing hydraulic sub is an optimized hydraulic pumping system that eliminates rod wear, lowers pump intake pressure, and extends the reserve life of oil and gas wells regardless of casing configuration or depth. Lowering the pump's intake pressure in an oil and gas well by using a positive displacement pump such as the present invention will allow maximum hydrocarbon reserves to be produced with minimal energy consumption to power the pump. The superior surface seals and smaller footprint of the rodless pump eliminate the possibility of surface hydrocarbon leaks, minimizing environmental impact.

Abstract: A pump device includes a pump driver comprising a first diaphragm and a second diaphragm, the first and second diaphragms each comprising a middle portion bounded by an outer portion, the first and second diaphragms being spatially separated from each other at the respective outer portions, and coupled together at the respective middle portions. The pump also includes a fluid passageway and a pump chamber fluidly connected to the fluid passageway, wherein the pump chamber comprises a moveable wall coupled to the pump driver at the middle portions of the first and second diaphragms such that a fluid movement between the pump chamber and the fluid passageway is induced by movement of the middle portions. An input device is configured to obtain a target flow rate. A controller is configured to operate the pump driver and a flow regulator based on signals received from a flow detector.

Abstract: A dispenser head for in-line mixing and dispensing of beverages, which may be carbonated or nitrogenated. The dispenser head comprising a pump, a dilution mechanism, an additive mechanism, and outlet nozzle and optionally a regulation system. In use, the pump can pump concentrate liquid for the liquid product from a concentrate source to the dilution mechanism; the dilution mechanism can receive diluent liquid suitable for the liquid product from a diluent source, operable to mix the diluent liquid and the concentrate liquid and provide diluted concentrate liquid; and the additive mechanism can receive additive fluid for the liquid product from an additive source, to combine the diluted concentrate liquid and the additive fluid.

Abstract: To manufacture a diaphragm pump with higher reliability in which the mechanism of a main valve is simplified without a pilot chamber.

Abstract: An apparatus and method for intelligently scheduling threads across a plurality of logical processors.

Abstract: This disclosure relates to a hydraulic pump system for handling a slurry medium comprising at least two reciprocating positive displacement pumps, both pumps being arranged for alternating intake of slurry medium via a suction inlet and discharge of slurry medium via a discharge outlet, and piston/cylinder discharge valves for alternating closing and opening each discharge outlet. In a first aspect, a hydraulic pump system for handling a slurry medium, comprising at least two reciprocating positive displacement pumps, both pumps being arranged for alternating intake of slurry medium via a suction inlet and discharge of slurry medium via a discharge outlet, and piston/cylinder discharge valves for alternating closing and opening each discharge outlet, as well as control means for controlling the alternate closing and opening of both piston/cylinder discharge valves, such that during operation no volume difference occurs in the discharge of slurry medium is disclosed.

Abstract: Provided are embodiments of a pressure-compensated load transfer device that includes a plate having a first shaft vertically installed on one side and a second shaft vertically installed on the other side to be coaxial with the first shaft. Also included is a first bellows having an opening in one side to surround the first shaft, with the other side thereof being fixed to the one side of the plate. Further included is a plurality of second bellows each having an opening in one end, with the other end thereof being attached to the other side of the plate. A housing is also included, and the housing includes a high-pressure working hole communicating with the opening of the first bellows and a high-pressure channel coplanar with the high-pressure working hole and communicating with the openings of the second bellows. The plate is back-and-forth movably received in the housing.

Abstract: A double-membrane pump has a pump housing and at least a first electromagnet associated with the pump housing. Magnet action elements that are ferromagnetic or permanent-magnetic elements or at least a second electromagnet associated with first and second membranes are alternately attracted or repelled by the first electromagnet, in contact-free manner. The ferromagnetic or permanent-magnetic elements may be metal bodies connected with the membranes or flexible metal layers associated with the membranes. The first-electromagnet may have first and second magnetic coils that can be operated independently of one another and that can influence the first and second membranes independently of one another.

Abstract: An internal pump backpack sprayer system includes first and second tanks and a double action pump unit. The first tank defines an open volume to hold a fluid. The second tank is received within the first tank and receives a pressurized fluid therein. The double action pump includes a cylinder and piston assembly having a cylinder housing with first and second inlets and first and second outlets. A piston is located and moveable within a cylinder. When the piston moves in an up-stroke, a first portion of the fluid is drawn from the first tank through the first inlet while the pressurized fluid is discharged to the second tank through the second outlet. When the piston moves in a down-stroke, a second portion of the fluid is drawn from the first tank through the second inlet while the pressurized fluid is discharged to the second tank through the first outlet.

Abstract: A fluid analyzer manifold for facilitating flow of a fluid through at least one surface mounted component for analysis by a fluid analyzer. The exemplary fluid analyzer manifold can include an analysis chamber for connection with the fluid analyzer, a first flow channel having a first surface opening and a second flow channel having a second surface opening on the fluid analyzer manifold, and a mounting area on the fluid analyzer manifold. The mounting area can include the first and second surface openings of the first and second flow channels, and facilitates surface mounting the at least one surface mounted component to the fluid analyzer manifold.

Abstract: A duplex reciprocating pump includes: a case member forming a pair of spaces; a movable partitioning member that partitions insides of these spaces into a first and second pump chamber and a first and second actuation chamber; a first switch valve mechanism provided with a first valve mechanism that switches supply of an actuation fluid to the first actuation chamber; a second switch valve mechanism provided with a second valve mechanism that switches supply of the actuation fluid to the second actuation chamber; a first switching mechanism that switches supply to the first switch valve mechanism of a control fluid; and a second switching mechanism that switches supply to the second switch valve mechanism of the control fluid, the first and second switching mechanisms switching supply so as to have an overlap period in which compression steps of the first and second pump chambers partially overlap.

Abstract: A diaphragm for use in a pump is provided. The diaphragm includes a flexible disc-shaped body having a first surface and an outer edge. The flexible disc-shaped body is made of an elastomer material. The fabric is applied on the first surface of the flexible disc-shaped body. And the fabric is composed of woven aramid based fibers.

Abstract: A system and a method of aerating well water using an aeration system comprising a well water drop pipe approximately vertically positioned having a bottom end in a well below the pumping level of the well water. Attached to the bottom end of the pipe is a submersible water pump, and a limited check valve is fluidly attached above the water pump. A flow restrictor is fluidly attached above the limited check valve to limit the flow of water up the pipe, and above the flow restrictor or the check valve is fluidly attached a bleeder to allow air to flow into the pipe when negative pressure is in the pipe. Above the bleeder is fluidly attached at least one check valve to prevent flow of water back to the bleeder.

Abstract: A dispenser system for providing variable carbonation can include a carbonated water source in communication with a carbonated water valve for controlling flow of carbonated water through the dispenser system; a still water source in communication with a still water valve for controlling flow of still water through the dispenser system; a nozzle in fluid communication with the carbonated water source and still water source; a processing device adapted to modulate the carbonated water and still water valves within a modulate cycle to achieve a ratio of carbonated to non-carbonated water; and a pour mechanism adapted to provide an input to the processing device to dispense the beverage.

Abstract: A dispenser system for providing variable carbonation can include a carbonated water source in communication with a carbonated water valve for controlling flow of carbonated water through the dispenser system; a still water source in communication with a still water valve for controlling flow of still water through the dispenser system; a nozzle in fluid communication with the carbonated water source and still water source; a processing device adapted to modulate the carbonated water and still water valves within a modulate cycle to achieve a ratio of carbonated to non-carbonated water; and a pour mechanism adapted to provide an input to the processing device to dispense the beverage.

Abstract: In at least one illustrative embodiment, a diaphragm pump includes a sleeve formed to include (i) a bore extending along a longitudinal axis and (ii) a sleeve port that opens to the bore, and a spool supported in the bore of the sleeve and formed to include a spool port, the spool being configured to move with a diaphragm during at least a portion of a stroke of the diaphragm such that the spool slides relative to the sleeve and, when the diaphragm reaches a turndown position that is between first and second end-of-stroke positions, the spool port aligns with the sleeve port to cause a pilot signal to be supplied to a cut-off valve. At least one of the sleeve and the spool may be rotatable about the longitudinal axis to adjust a location of the turndown position relative to the first and second end-of-stroke positions.

Abstract: A diaphragm pump (10) including a body (11) that provides a pair of opposed pump chambers (12) and (13). Mounted in the body (11) is a piston assembly (14) providing a pair of pistons (15) joined by a transverse piston rod (16) so that the pistons (15) are caused to reciprocate in unison linearly in the direction (17) along the axis (18). Each piston (15) includes a diaphragm (22) that provides a first sub-chamber (23) and a second sub-chamber (24). A working fluid (liquid or gas) under pressure is alternately delivered to the sub-chambers (23) to cause the piston assembly (14) to reciprocate. A valve (25) is operated to co-ordinate delivery of the fluid under pressure or alternately to the first sub-chambers (23).

Abstract: A method of displacing fluid includes pulling a pump displacement member through a suction stroke with a pull, the pull configured to transmit only tensile forces to the fluid displacement member. A working fluid disposed in an internal pressure chamber drive the fluid displacement member through a pumping stroke. The pull is prevented from transmitting any compressive forces to the fluid displacement member, such that the pull does not drive the fluid displacement member through the pumping stroke.

Abstract: A hydraulic fluid distribution system includes a mechanical switch including a first valve, a first actuation pin extending axially from the first valve, and a second actuation pin extending axially from the first valve. The first valve includes an inlet port, a first outlet port, and a second outlet port. The first valve has a first position with the inlet port in fluid communication with the first outlet port and a second position with the inlet port in fluid communication with the second outlet port. The first actuation pin is configured to move in a first axial direction to transition the first valve from the second position to the first position, and the second actuation pin is configured to move in a second axial direction to transition the first valve from the first position to the second position.

Abstract: In an engine having an electronically controlled hydraulic system for variable actuation of intake valves, an operating step of refilling, prior to ignition of the engine, is activated to refill a pressure chamber of the system with fluid when, after prolonged engine inactivity, the chamber has been emptied. In this refilling step, fuel supply to the engine is inhibited, and a camshaft is rotationally driven following upon activation of an engine-starting electrical machine. In this way, a pumping member associated to a tappet for actuating an intake valve is used as a pump for drawing fluid into the pressure chamber from an auxiliary fluid tank. During this step, a control valve is opened and closed in synchronism with movement of the pumping member so as to be open when the pumping member advances towards the pressure chamber and closed when the pumping member moves away from the pressure chamber.

Abstract: A novel changeover mechanism for a compressed air driven double diaphragm pump comprises a shaft slidably mounted through aligned apertures in opposing surfaces of the twin diaphragm chambers. At the center of the shaft between the two diaphragm chambers is provided an annular notch in to which is located an arm extending from a U shaped frame. The U shaped frame is pivotally mounted atop a valve plate which includes multiple ports. Positioned against a surface of the valve plate is a valve closure component which is configured to slide across the surface selectively obstructing the multiple ports. The valve closure component is held in place by a metal peg hingedly mounted in slots provided in parallel extension of the U shaped frame. Linear tension springs connect the hinged wire pusher with U shaped frame adjacent the pivot point. The springs bias the position of the valve closure component against the valve plate in an off center position.

Abstract: A fluid pump includes a pump body enclosing a first cavity and a second cavity, a first flexible member disposed within the first cavity, a second flexible member disposed within the second cavity, and a drive shaft extending between and attached to each of the first flexible member and the second flexible member. The drive shaft is configured to slide back and forth within the pump body. The pump also includes a first shift valve and a second shift valve disposed between the first flexible member and the second flexible member, operatively coupled to deliver a drive fluid to drive fluid chambers in alternating sequence. Some fluid pumps disclosed herein include a housing defining a modular-receiving cavity and a modular insert secured within the modular-receiving cavity by an interference fit. Methods of manufacturing and using fluid pumps are also disclosed.

Abstract: Diaphragm pumps, and pre-charging systems for use with such pumps, are disclosed. The diaphragm pump includes a first diaphragm that separates a cavity into a motive fluid chamber and a pumped media chamber, a charge chamber having a controlled volume, wherein the controlled volume is adjustable to vary a controlled mass of compressed fluid capable of being stored in the charge chamber, and one or more valves configured to (i) fluidly couple the motive fluid chamber to an exhaust chamber during a first stroke period, (ii) fluidly couple the charge chamber to a compressed fluid inlet during at least a portion of the first stroke period, and (iii) fluidly couple the charge chamber to the motive fluid chamber during a second stroke period.

Abstract: An apparatus and method for determining thread execution parallelism. For example, a processor in accordance with one embodiment comprises: a plurality of cores to execute a plurality of threads; a plurality of counters to collect data related to the execution of the plurality of threads on the plurality of cores; a dependency analysis module to analyze the data related to the execution of the threads and responsively determine a level of inter-thread dependency; and a control module to responsively adjust operation of the plurality of cores based on the determined level of inter-thread dependency.

Abstract: A viscometer cell attachment device which greatly improves efficiency, accuracy, precision, and safety when testing viscosity of a substance with a viscometer. The viscometer cell attachment device generally allows dangerous, high pressure, potentially explosive/flammable methane/fluids in a viscometer cell to be partially removed and contained safely, sheared by a constriction member, generally comprised of a length of OD tubing, which generates foams/emulsions, and then put back in the viscometer cell. The invention can be attached to some types of viscometers. It can handle methane safely and can be used to produce homogeneous methane/fluids foams/emulsions by repeating the process.

Abstract: In at least one illustrative embodiment, a diaphragm pump may include a sleeve formed to include (i) a bore extending along a longitudinal axis and (ii) a sleeve port that opens to the bore, and a spool supported in the bore of the sleeve and formed to include a spool port, the spool being configured to move with a diaphragm during at least a portion of a stroke of the diaphragm such that the spool slides relative to the sleeve and, when the diaphragm reaches a turndown position that is between first and second end-of-stroke positions, the spool port aligns with the sleeve port to cause a pilot signal to be supplied to a cut-off valve. At least one of the sleeve and the spool may be rotatable about the longitudinal axis to adjust a location of the turndown position relative to the first and second end-of-stroke positions.

Abstract: An air motor (10) that receives compressed air in order to be driven. The air motor (10) includes a valve assembly (11) with a base (12) of a unitary construction. The base (12) has opposite side faces (13) to which there is sealingly attached caps (14) that in cooperation with flexible diaphragms (15) provide working chambers (15, 16).

Abstract: A microfluidic pump for implantation proximate an eye of a patient is disclosed herein. The microfluidic pump includes a first substrate with a microfluidic actuator that includes a first chamber and a second chamber coupled by a channel, an electrode in each of the chambers, and a slug positioned within the channel. The slug is displaceable by an electric potential. The microfluidic actuator of the microfluidic pump includes a reservoir aligned with the chamber, a membrane portion separating the reservoir and the chamber, and a second reservoir aligned with the second chamber. A second membrane portion separates the second reservoir and the second chamber. Each of the reservoirs has an inlet and an outlet; each of the inlets has a valve that prevents backflow. A second substrate of the microfluidic pump includes a flow path coupling the outlet of the first reservoir to the inlet of the second reservoir.

Abstract: A novel changeover mechanism for a compressed air driven double diaphragm pump comprises a shaft slidably mounted through aligned apertures in opposing surfaces of the twin diaphragm chambers. At the center of the shaft between the two diaphragm chambers is provided an annular notch in to which is located an arm extending from a U shaped frame. The U shaped frame is pivotally mounted atop a valve plate which includes multiple ports.

Abstract: A pressure intensifier including reciprocating pistons located in respective piston chambers, and a valve mechanism which reciprocates corresponding to movement of the pistons. A pressurized fluid is received by the intensifier and is routed to the piston chambers via movement of the valve mechanism to drive the pistons for boosting pressure of an outgoing fluid. Thus, the pressure of the incoming fluid is used to boost the pressure of the outgoing fluid.

Abstract: A pump operated with compressed gas is disclosed herein. The pump has two separate cylinders which share a common wall. Pistons are attached to a common shaft that runs through the common wall. The pistons are disposed within each of the cylinders. The pistons divide the cylinders into gas and liquid chambers. The liquid chambers of the cylinder form a liquid system and are in fluid communication with the liquid inlet and outlet. The gas chambers of the cylinders form a gas system and are in communication with gas inlet and outlet. A manifold switching mechanism controls routing of compressed gas to either one of the gas chambers to operate the gas operated pump. The pump may also have an automatic shutoff valve which shuts off operation of the pump when liquid from a liquid source has been depleted.

Abstract: A pump operated with compressed gas is disclosed herein. The pump has two separate cylinders which share a common wall. Pistons are attached to a common shaft that runs through the common wall. The pistons are disposed within each of the cylinders. The pistons divide the cylinders into gas and liquid chambers. The liquid chambers of the cylinder form a liquid system and are in fluid communication with the liquid inlet and outlet. The gas chambers of the cylinders form a gas system and are in communication with gas inlet and outlet. A manifold switching mechanism controls routing of compressed gas to either one of the gas chambers to operate the gas operated pump by way of a spool valve or a shuttle valve mechanism. The pump may also have an automatic shutoff valve which shuts off operation of the pump when liquid from a liquid source has been depleted.

Abstract: Apparatus (10, 200) for the provision of TNP therapy to a wound is described, the apparatus (10, 200) including: a waste canister (22, 204) into which fluid is aspirated from a wound by aspiration pump means (44, 248) and a fluid flow path (420, 422) for at least a part of said aspirated fluid on an outlet side of said aspiration pump means (44) wherein said fluid flow path (420, 422) on the outlet side comprises a silencing system (400) having a plurality of silencing elements (402, 404, 406) therein.

Abstract: An electromagnetic vibrating diaphragm pump is provided with a draining structure which can easily drain water flowed into the pump without a separate member preventing inflow of water. A first communicating passage is formed at a bottom end of a partition wall between a suction chamber and a compression chamber. A bottom portion inside the suction chamber slopes down toward the passage, making its compression chamber side lower than the suction chamber side. A second communicating passage is formed at a bottom end of a partition wall between an exhaust chamber and the compression chamber. A bottom portion inside the compression chamber slopes down toward the passage, making its exhaust chamber side lower than the compression chamber side. A bottom portion inside the exhaust chamber slopes down toward the exhaust port to make the exhaust port side lower. The exhaust port slopes down to make an outlet side thereof lower.

Abstract: A pumping cassette including a housing having at least two inlet fluid lines and at least two outlet fluid lines. At least one balancing pod within the housing and in fluid connection with the fluid paths. The balancing pod balances the flow of a first fluid and the flow of a second fluid such that the volume of the first fluid equals the volume of the second fluid. The balancing pod also includes a membrane that forms two balancing chambers. Also included in the cassette is at least two reciprocating pressure displacement membrane pumps. The pumps are within the housing and they pump the fluid from a fluid inlet to a fluid outlet line and pump the second fluid from a fluid inlet to a fluid outlet.

Abstract: A diaphragm pump includes a diaphragm cartridge assembly. The diaphragm cartridge is a self-contained unit having a diaphragm defining a pumped fluid side and a hydraulic fluid side and a seat receiving the hydraulic fluid side of the diaphragm and having a center opening. A biasing rod mounts to the diaphragm on the hydraulic fluid side and extending through the opening of the seat. A valve guide at an extended end of the biasing rod and a valve spool slidably mounts on the valve guide. A biasing element engages the seat and the valve guide. The pump may also include valve cartridges including a combined inlet check valve and discharge check valve.

Abstract: A process fluid pump can include a pump chamber, an inlet valve, and an outlet valve. Diaphragm regions can define at least a portion of each of the pump chamber, the inlet valve, and the outlet valve. The diaphragm regions can each have an actuation region with a surface that is convexly shaped when the formed actuation region is in a natural unstressed first state, and each formed actuation region can be actuated by a motive fluid to transition to a second state in which the surface is non-convexly shaped.

Abstract: A piston type pumping apparatus comprises a vertically oriented cylinder having a top and a bottom with a first aperture. There are first and second passageways for liquid in the cylinder at the top and bottom respectively thereof. A piston is reciprocatingly mounted within the cylinder and has an area against which pressurized fluid acts in the direction of movement of the piston. A hollow piston rod is connected to the piston and extends below the piston and slidably through the first aperture. There is a reload chamber below the cylinder. The piston rod extends slidably into the reload chamber and has a third passageway for liquid communicating thereto. A first one-way valve is located in the third passageway. There is also a fourth passageway that extends from the reload chamber to a source of liquid to be pumped and a second one-way valve therein.

Abstract: In at least one illustrative embodiment, a diaphragm pump may comprise a sleeve formed to include (i) a bore extending along a longitudinal axis and (ii) a sleeve port that opens to the bore, and a spool supported in the bore of the sleeve and formed to include a spool port, the spool being configured to move with a diaphragm during at least a portion of a stroke of the diaphragm such that the spool slides relative to the sleeve and, when the diaphragm reaches a turndown position that is between first and second end-of-stroke positions, the spool port aligns with the sleeve port to cause a pilot signal to be supplied to a cut-off valve. At least one of the sleeve and the spool may be rotatable about the longitudinal axis to adjust a location of the turndown position relative to the first and second end-of-stroke positions.

Abstract: Illustrative embodiments of diaphragm pumps with chamber crossventing, and methods of operating such pumps, are disclosed. In at least one illustrative embodiment, a method of operating a diaphragm pump may comprise communicating compressed fluid from a compressed fluid inlet to a first motive fluid chamber to cause first and second diaphragms to move to a first end-of-stroke position, communicating compressed fluid from the first motive fluid chamber to a second motive fluid chamber while the first and second diaphragms are in the first end-of-stroke position, communicating compressed fluid from the compressed fluid inlet to the second motive fluid chamber to cause the first and second diaphragms to move to a second end-of-stroke position, and communicating compressed fluid from the second motive fluid chamber to the first motive fluid chamber while the first and second diaphragms are in the second end-of-stroke position.

Abstract: A pump includes a pump body defining a fluid chamber and inlet and outlet ports in fluid communication with the fluid chamber, an inlet check valve connected to the inlet port, an outlet check valve connected to the outlet port, and a piston housing coupled to the pump body and defining a piston chamber. A piston assembly is disposed at least partially within the piston chamber and at least partially within the fluid chamber and includes a piston and a poppet connected to the piston in proximity to the pump body. In addition, the pump includes a gland disposed between a portion of the piston housing and the pump body. Further, the pump includes the poppet having a poppet head axially connected to a diaphragm coupled to a poppet flange. The poppet head is connected to the piston.

Abstract: A pump includes a pump body defining a fluid chamber and inlet and outlet ports in fluid communication with the fluid chamber, an inlet check valve connected to the inlet port, an outlet check valve connected to the outlet port, and a piston housing coupled to the pump body and defining a piston chamber. A piston assembly is disposed at least partially within the piston chamber and at least partially within the fluid chamber and includes a piston and a poppet connected to the piston in proximity to the pump body. In addition, the pump includes a gland disposed between a portion of the piston housing and the pump body. Further, the pump includes the poppet having a poppet head axially connected to a diaphragm coupled to a poppet flange. The poppet head is connected to the piston.

Abstract: A pump for driving a hydraulic fluid to adjust an angle of an airfoil has a transmission to be rotated to change the angle of incident of a plurality of airfoils. The transmission is driven through a rotating input to in turn rotate, and change the angle. The input is caused to rotate by a piston having engaging threads on the input, and the piston is mounted within a hydraulic chamber. Opposed chambers are on each of two opposed ends of the piston. A piezoelectric pump selectively delivers pressurized fluid into the opposed chambers to drive the piston, and to in turn cause the input to rotate.

Abstract: An method and apparatus for disbursing a pressurized liquid in the absence of electricity are disclosed. The method and apparatus for disbursing a pressurized liquid in the absence of electricity can include a gas source, a liquid source, a liquid pressurization system, and a liquid delivery system.

Abstract: A fluid pump comprising a fluidic manifold comprising a plate constructed of a fluid-impermeable material. The plate has a pump platen, first fluid connectors, and second fluid connectors, and one or more channels formed therein for connecting the first connectors to the second connectors. The fluid pump has a fluid-impermeable membrane positioned on the plate and covering the one or more fluid channels to form one or more fluid paths. The fluid pump also has a pump tubing positioned on the pump platen, the pump tubing having a first part connected to a first one of the first fluid connectors and a second part connected to a second one of the first fluid connectors such that the pump tubing is fluidly connected to the channels via the first one and the second one of the first fluid connectors.