Abstract: A wind turbine blade includes a trailing edge including a radially inboard portion and a radially outboard portion opposite the radially inboard portion. The trailing edge further includes at least one serrated portion extending at least partially between the radially inboard portion and the radially outboard portion. The serrated portion includes at least one substantially acoustically absorbent material.

Abstract: A vibratory drive includes a pulse generator and at least one actuator. The actuator includes a first fluid chamber and a second fluid chamber, the volumes of which are adjustable in phase opposition. The first fluid chamber has a fluid connection to a third fluid chamber in the pulse generator. The second fluid chamber has a fluid connection to a fourth fluid chamber in the pulse generator. The third and fourth fluid chambers each have portions that are defined by linearly moveable defining elements. The pulse generator includes a rotor that rotates relative to a first axis of rotation and that defines respective portions of the third fluid chamber and the fourth fluid chamber. The defining elements are linearly moveable in the rotor. The pulse generator includes a coupling element that is separate from the rotor. The defining elements are coupled in their movement to that of the coupling element.

Abstract: A piston pump is described for pumping a fluid. The pump includes at least one cylinder having a piston movable inside the cylinder along the longitudinal axis of the cylinder by a drive, each cylinder having at an end face a mounting flange having at least one cylinder opening, and a chamber having a volume that changes when the associated piston is moved in the cylinder. The piston pump has an inlet port for supplying and an outlet port for draining the fluid. A rotatable valve plate is arranged on the other side of the mounting flange. The mounting flange has at least one passage in the region of the inlet port and the outlet port, respectively, through which the fluid can flow between the inlet port and/or the outlet port and the other side of the mounting flange. The valve plate has fluid-transporting means by which, upon rotation of the valve plate at least one cylinder opening can be connected to a passage of the inlet and/or the outlet port.

Abstract: A pumping device includes a pump and a connector. A piston is slidably disposed in a container of the pump. A pumping rod is connected with the piston with an end, and the other end of the pumping rod extends outward. The container has an opening at a bottom thereof, and a first connecting portion is formed around the opening. The connector has a cavity, an inlet channel, and an outlet channel. The inlet channel and the outlet channel communicate with the cavity respectively. The connector has a second connecting portion to be engaged with the first connecting portion to allow the cavity communicating with the opening of the container. The inlet channel only allows fluid entering the cavity, and the outlet channel only allows fluid leaving the cavity.

Abstract: A combined pump-injector valve system utilizing a monolithic body to provide the barrel of the pump and as the stator of the valve, thus eliminating any need for connections between a pump and a valve, and therefore the potential for high-pressure leaks or pressure reductions. The combined pump-injector valve permits injection of nanoliter-sized samples into a chromatographic column, which is sealed during loading of the sample and filling of the pump, such that complete analyses can be completed with microliters of mobile phase with nanoliters of a sample. The pump-injector valve system further includes a pressure sensor external the barrel of the pump and may include an interim position intermediate loading and injection where the contents of the barrel may be pressurized to a desired pressure.

Abstract: Systems and methods for determining the existence of a pump-off condition in an ESP system and controlling the motor to prevent fluid pound that would otherwise result from the pump-off condition. The current drawn by the ESP motor during a power stroke is monitored and the instantaneous force generated by the motor is determined from the instantaneous current. Pump-off conditions may be indicated by sudden, large decreases in the generated force, smaller decreases in force that occur over a longer period, or forces below those seen during a dwell time. In response to detecting a pump-off condition, the motor may be stepped through the rest of the stroke, temporarily halted and re-initialized, thereby preventing potentially damaging fluid pound that would otherwise result from the pump-off condition.

Abstract: In a variable displacement type swash plate compressor, a connecting mechanism that connects a movable body and a swash plate includes a first arm having a first guide surface and a second arm having a second guide surface. The first and second arms extend from the movable body toward the swash plate and disposed on opposite sides of an imaginary plane that is defined to extend passing through a top dead center portion and an axis of rotation. The first arm and the second arm have a first opening and a second opening, respectively, that are open in a direction opposite to a direction in which a link pin moves on the first guide surface and the second guide surface with an increase of the inclination angle of the swash plate.

Abstract: A variable displacement type swash plate compressor includes a housing having therein a swash plate chamber and a plurality of cylinder bores, a drive shaft, a swash plate, and a link mechanism and a plurality of pistons. The compressor further includes a partitioning body, a movable body, a control chamber, a control mechanism and a connecting mechanism. The connecting mechanism includes first and second arms, a traction portion, and a link pin. The first and second arms have first and second guide surfaces that are placed in contact with the link pin. The link pin is held by the traction portion so as to be rollable on the first and second guide surfaces, respectively. A restrictor is provided on the ling pin or in the first and second arms so as to prevent the link pin from moving in a direction of an axis thereof.

Abstract: A method of operating a cryopump includes: cooling a cryopanel from an initial temperature higher than a cryogenic temperature for a vacuum pumping operation to the cryogenic temperature by using a refrigerator; and after the cooling, initiating the vacuum pumping operation, in which the cooling includes providing a cooling relief effect selectively to a high-temperature stage of the refrigerator.

Abstract: Constructive disposition introduced in reciprocating compressor suction valve, whose moving parameters of elastic flexion area and, therefore, sealing end are mainly defined by specific geometries and dimensions of the own flexible segment of suction valve. Furthermore, the stiffness coefficient and natural frequency of flexible segment of suction valve are also defined from specific geometries and dimensions of the own flexible segment of suction valve, without being necessary to alter the material or thickness of metallic blade where the suction valve is defined.

Abstract: A gas compression system is provided. The gas compression system includes a compressor, an adsorption device, and a fluid control device. The compressor includes a first port and a second port. The adsorption device is adapted to output the high pressure hydrogen gas to the first port and absorb the low pressure hydrogen gas from the second port. The adsportion includes a first container connected to the first port or the second port, and a second container connected to the first port or the second port. The first container and the second container includes a hydrogen adsorption material adapted to release the high pressure hydrogen gas when heated, and absorb the low pressure hydrogen gas when cooled. A method of using the gas compression system is also provided.

Abstract: A gas compression device (10) is provided with a compressor (16) and a recovery section (20). The recovery section (20) is provided with a recovery passage (22), an auxiliary compressor (24) which is provided in the recovery passage (22), and a recovery tank (26) which is provided in the recovery passage (22). When gas leaks from the main compressor (16), the auxiliary compressor (24) is driven and the leaked gas is compressed. The leaked gas, the pressure of which has been increased by the auxiliary compressor (24), flows into the recovery tank (26) and is stored therein. The gas within the recovery tank (26) is fed to a suction passage (14).

Abstract: A portable air compressor including an air tank configured to store compressed air. The portable air compressor further includes a compressor unit coupled to the air tank including compressor components for compressing air, and a housing having a base disposed generally between the compressor components and the air tank. The base has a concave recess extending at least partially around a circumference of the compressor unit. The portable air compressor further includes a power cord for supplying power to the compressor components. The power cord is receiveable around the circumference of the compressor unit in the recess for storage.

Abstract: An air-operated double diaphragm pump, wherein the pump (40) is disposed with a shaft (30) and a bushing (28). The shaft (30) includes a plurality of indentations which allow passage of air and the bushing (28) is adapted to receive the shaft (30) and be in sliding engagement with the shaft (30). The bushing (28) includes vents (22) formed on the bushing and a hole (24) formed at each respective terminal portion of the bushing (28) to allow passage of air. The bushing (28) also includes ribs (26) protruding radially outwards from inner surface of the bushing (28) toward the shaft (30). The indentations (34) disposed along the shaft (30) and hole (24) formed at each terminal portion of the bushing (28) are alignable to create a path for air to travel.

Abstract: The invention relates to a method for operating a pump system and to a pump system (10) having a pump unit (11) for dispensing multi-component material under pressure by means of a spray gun, the pump unit comprising a pump device (12), a mixer (13) and a spray gun (14), the pump device having at least two pumps (16, 17) for pumping component material and associated liquid tanks (18, 19) for storing component material, the pump device having an operating means (23) by means of which the pump device is controlled, wherein the pump system has a control device (24), the control device and the operating means together forming a control unit (25) by means of which the pump unit is controlled, the control device being arranged at a distance from the pump unit, and data being exchanged between the control device and the operating means.

Abstract: A microfluidic pump having a firing mechanism for ejecting fluid out of a firing chamber during a firing sequence, which includes a firing step followed by a wait step. A power circuit activates and deactivates the firing mechanism in response to a control signal, which controls the timing of each step and is provided by a logic circuit. The control signal controls the firing step and is dependent on a predetermined fixed frequency signal provided by a first oscillator. The control signal controls the wait step and is dependent on a variable frequency signal provided by a second oscillator. A first input provides a variable input signal to the second oscillator. The second oscillator varies the variable frequency signal according to the variable input signal. The logic circuit also varies the control signal based on the variable frequency signal to vary the length of the wait step.

Abstract: A well pumping system can include an actuator that reciprocably displaces a rod string, a continuous position sensor that continuously detects a position of a member of the actuator, and a control system that modifies reciprocal displacement of the rod string by the actuator, in response to an output of the continuous position sensor. A well pumping method can include reciprocably displacing a rod string, continuously detecting a velocity profile with a continuous position sensor, and modifying the velocity profile while the rod string reciprocably displaces, in response to an output of the continuous position sensor.

Abstract: A well pumping system can include an actuator that reciprocably displaces a rod string, a flowmeter that measures flow of a fluid between a power source and the actuator, and a control system that modifies reciprocal displacement of the rod string by the actuator, in response to an output of the flowmeter. A well pumping method can include reciprocably displacing a rod string, continuously determining a velocity profile of the rod string, and modifying the velocity profile while the rod string reciprocably displaces, in response to an output of a flowmeter. Another well pumping method can include reciprocably displacing a rod string with an actuator, continuously determining displacement in response to an output of a flowmeter, and modifying reciprocating displacement of the rod string by the actuator, in response to the output of the flowmeter.

Abstract: A pump supplying an application system of a liquid covering product including a motor actuating at least two pistons, a drum rotated by the motor, the drum including an outer cylindrical surface having a cam profile, each piston being secured to a rod on which a roller is fastened rolling over the cam profile such that the roller connected to each piston via one of the rods is translated along the translation axis of the corresponding piston under the action of the rotation of the drum, each roller being in contact with the cam profile in an angularly offset position relative to the other rollers such that one of the pistons is moving when the other piston reaches an inversion point of its movement direction, and the pump including compensating means suitable for accelerating one of the pistons when another piston reaches an inversion point of its movement direction.

Abstract: A variable displacement type swash plate compressor includes a housing having therein a suction chamber, a discharge chamber, a control pressure chamber, a shaft hole, and cylinder bores. The compressor further has a drive shaft, a swash plate, an inclination angle changing mechanism, pistons, introduction passages, and a valve mechanism. The valve mechanism includes a valve element is disposed in a passage connecting the control pressure chamber and the suction chamber. The valve element is integrally rotatable with the drive shaft and axially movable by a pressure difference across the valve element. An opening of the residual gas bypass passage is changed by the axial movement of the valve element. The valve element selectively connects and disconnects the introduction passages with the residual gas bypass passage.

Abstract: A piston seal assembly is disclosed comprising a seal and a seal energizer which supports the seal. The piston seal assembly comprises one component that is designed to position the seal energizer in a fixed axial position within the piston groove. In one embodiment, the seal energizer has the shape of a split ring with at least one of its lateral surfaces shaped to position the energizer in a fixed position within a piston groove. In other embodiments the piston seal assembly comprises a spacer that is positioned next to the seal energizer within the piston groove and is designed to position the seal energizer in a fixed axial position. The piston seal assembly can comprise a seal that has a portion which protrudes between the seal energizer and the piston groove wall such that it positions the seal energizer in a fixed axial position within the piston groove.

Abstract: Fluid flow system including a block forming a first receiving portion having a first inner bore, a second receiving portion having a second inner bore, a third receiving portion having a third inner bore, and a fourth receiving portion having a fourth inner bore, all of which are in fluid communication with one another and form an intersecting portion. A reciprocatable piston is received in the first receiving portion. A first transition element is located between the first receiving and intersecting portions. A second transition element is located between the second receiving and intersecting portions. A third transition element is located between the third receiving and intersecting portions. A fourth transition element is located between the fourth receiving and intersecting portions. At least one transition element has transition bore truncated at opposing sides.

Abstract: A method of treating, tuning, assembling, and/or overhauling a twin rotor device (200, 1200) includes applying a coating material (102) on an internal set of working surfaces (218, 222, 224, 226, 228, 1218, 1222, 1224, 1226, 1228) of the twin rotor device when at least partially assembled. The coating may be factory or field applied to a new or used twin rotor device. The working surfaces may be uncoated or previously coated and may be built-up as the coating material forms a coating (206, 1206) on at least some of the working surfaces. Manufacturing variations of a pair of rotors (220, 1220) and a housing (210, 1210) may be compensated by the coating. One or more performance characteristics of the twin rotor device may be improved by the coating, and variation between a series of twin rotor device may be reduced or substantially eliminated. The coating may reduce internal leakage and increase volumetric efficiency of the twin rotor device.

Abstract: A pump assembly is provided and includes a housing having first, second and third pairs of fluid openings and first, second and third rotary pumps, which are co-rotatable about a common longitudinal axis defined through the housing to drive fluid flow relative to the first, second and third pairs of fluid openings, respectively. The first rotary pump includes an input member receptive of rotational drive energy for the first, second and third rotary pumps.

Abstract: The area of a back-pressure chamber is increased so that pressing force on a rotational scroll due to back pressure is enhanced to reduce leakage of refrigerant gas through a chip clearance, thereby achieving improved compression efficiency. A scroll compression mechanism configured to form a compression pocket between a fixed scroll and a rotational scroll 10 facing each other and including a thrust plate 12 configured to support a thrust load of the rotational scroll 10, and a back-pressure supplying mechanism 6 configured to supply part of compressed refrigerant gas to a back side of the thrust plate 12 as back pressure are provided.

Abstract: An electric submersible pump (ESP) control system includes a primary variable frequency drive (VFD), a transformer, and a secondary VFD. The primary variable frequency drive (VFD) is configured to receive power from a power source and output a variable voltage and variable amplitude AC voltage. The transformer has a low voltage side and a high voltage side of the transformer. The primary VFD is coupled to the low voltage side. The transformer is configured to receive the AC voltage from the primary VFD and output a stepped up AC voltage. The secondary VFD is coupled to the high voltage side of the transformer, wherein the secondary VFD is configured to provide a supplemental voltage in addition to the stepped up AC voltage when the operational values of an electric motor exceed a threshold value.

Abstract: A magnetic bearing device comprises a first carrier generation section generating a first carrier signal; a second carrier generation section generating a second carrier signal whose phase differs by (?/2+?) radian from the phase of the first carrier signal; a first demodulation section performing demodulation by sampling the first modulated signal at sampling timing shifted by a phase ? from timing at which the first carrier signal becomes a peak; a second demodulation section performing demodulation by sampling the second modulated signal at sampling timing shifted by a phase (??) from timing at which the second carrier signal becomes a peak; and a controller controlling current in each of the first radial electromagnet and the second radial electromagnet, based on a result of the demodulation by each of the first demodulation section and the second demodulation section.

Abstract: Disclosed is a method for operating a compressor of a turbomachine, in which, when viewed in the direction of a main flow, a slowly dropping degree of reaction being raised in one compressor area more quickly than previously dropped and the raised degree of reaction then being reduced again in a subsequent compressor area more slowly that it was previously raised, a compressor of a turbomachine including at least one degree of reaction rising more quickly in one compressor area in comparison to adjacent compressor areas with respectively a dropping degree of reaction, whereby a sawtooth-shaped curve of the degree of reaction results, and a turbomachine including a compressor of this type.

Abstract: A bushing including a body portion including a cylinder portion having a bore there through configured to receive a bolt; a flange portion orthogonal and integral to the cylinder portion, the flange portion configured to abut a load bearing surface of a flange; a lip portion orthogonal to and integral to the flange portion proximate the cylinder portion, wherein the lip portion redistributes a flange load.

Abstract: A multistage centrifugal pump (1) has impellers (9) arranged on a common shaft (8), which is rotatably arranged within a pump casing (2-4). One end of the shaft (8) is led out of the casing (2-4) for connection to a drive motor and another shaft end (15) is rotatably mounted in the pump casing (2-4). The shaft end (15) which is mounted within the pump casing (2-4) is subjected to a counter-force which is produced by way of pressure subjection via a conduit connection to a delivery side of the pump. An axial seal (11) is provided on the shaft end (15) arranged within the pump casing (2-4). The rotating part of the axial seal is led on the shaft end and the non-rotating part is led, axially movably, within the pump casing (2-4). A sealing arrangement is provided between the pump casing and the axially movably mounted part.

Abstract: A rotor assembly for use in a turbofan engine is provided. The rotor assembly includes an annular spool including a blade opening defined therein, and a rotor blade radially insertable through the blade opening. The rotor blade includes a rotor blade radially insertable through the blade opening. The rotor blade includes a root portion having a dovetail shape, and the root portion is undersized relative to the blade opening. At least one secondary dovetail member is positioned within the blade opening and configured to couple the root portion within the blade opening with an interference fit.

Abstract: A turbine engine airfoil apparatus, including an airfoil defined by a plurality of airfoil sections arrayed along a stacking axis that extends between a root and a tip, wherein at least two of the airfoil sections spaced apart from each other have differing airfoil section thermal expansion properties.

Abstract: The present invention concerns a blade for industrial axial fan and an industrial axial fan comprising such blade. More in details, the present invention concerns a blade for industrial axial fan comprising an attachment and an airfoil, said attachment connecting the airfoil to the hub and characterized in that said attachment has a stiffness and a stiffness distribution that allows the attachment to deform in a way to have at least an inflection point during the operation of the axial fan.

Abstract: An air flow assembly, such as a fan assembly, and associated methods are shown that may include one or more media dispensing nozzles. Examples of assemblies and methods are shown that include nozzles located within hollow vanes. Other examples of fan assemblies and methods are shown that create multiple cross sectional vortices that may be useful to concentrate a dispersed media.

Abstract: An airseal for sealing between a rotating component and a stationary component of a turbine engine includes a sealing surface defining a spacing between the airseal and a rotating component of the turbine engine and a mounting flange to secure the airseal to a stationary component of the turbine engine. An airseal body extends between the sealing surface and the mounting flange. The airseal body includes a cavity configured to absorb thermal energy transferred into the airseal from a flowpath of the turbine engine. A gas turbine engine includes a rotating component and a stationary component located radially outboard of the rotating component. An airseal is located therebetween and includes a sealing surface and a mounting flange to secure the airseal to the stationary component. An airseal body extends between the sealing surface and the mounting flange and includes a cavity to absorb thermal energy transferred into the airseal.

Abstract: Described is a method for operating a compressor of a turbomachine, in which, when considered in the direction of a main flow, an, in particular, radially averaged degree of reaction has dropped in a front compressor area from a maximum to a minimum, is held constant or virtually constant across a central compressor area up into a rear compressor area, an, in particular, radially averaged degree of reaction being adjusted in the rear compressors area which is closer to the minimum than to the maximum, and a residual swirl of at least 47° is present in the middle section, and a compressor and a turbomachine.

Abstract: A stator vane segment (10) including a connection system (12) that enables stator vane (14) alignment while enabling an individual stator vane (14) to be replaced is disclosed. The stator vane connection system (12) may include a radially extending inner support (26) extending from a stator vane (14), whereby the inner support (26) is secured to forward and aft inner rings via a removable, inner axial bolt (22). The stator vane connection system (12) may include one or more first inner pins (24) that aligns the stator vane (14) and is positioned within the portion of the inner support (26) of the stator vane (14) to which one or more inner axial bolts (22) are attached. The stator vane connection system (12) may include one or more first outer alignment pins (28) that aligns the stator vane (14) and is positioned within a portion of the outer diameter platform (48) of the stator vane (14), whereby the first outer alignment pin (28) aligns the stator vane (14).

Abstract: A side-discharge blower fan unit with ductwork for controlling air flow is disclosed, according to certain embodiments.

Abstract: The invention relates to a method for assembling a fan unit into an electronic device and removing therefrom. The electronic device has a first connector. The fan unit includes a fixture, a fan, a second connector and a handle. The fan is assembled into the fixture and electrically connected to the second connector. The handle is pivotally connected to the fixture and operable to be pivotally moved between a first position and a second position of the fixture. When the handle is operated to move to the first position, the fixture is pushed to approach to the first connector, so as to so as make the second connector connect to the first connector in mechanical and electrical. When the handle is operated to move to the second position, the fixture is pulled out by the handle, so as to make the second connector disconnected to the first connector.

Abstract: A multi-stage centrifugal pump includes a pump casing, in which a shaft (8) carrying an impeller is rotatably arranged. The pump casing has a pump casing foot part (2) that includes a reversibly closable maintenance opening (60), via which a bearing and/or seal (20, 25), which is arranged at a shaft end within the pump casing, is accessible and exchangeable.

Abstract: A centrifugal blood pump prevents a shaft member from oscillating due to expansion of a pump housing resulting from pressurization of the blood. The centrifugal blood pump is manufactured by assembling a bottom member 21 and a lid member 22, and compressing them in a direction in which the bottom member 21 and the lid member 22 approach each other by a deformation amount along their outer circumferential walls. The lid member and the bottom member are joined while in the compressed state in order to create a preloading force between the shaft member and bearings to resist the expansion due to pressurization of the blood during use.

Abstract: A fan (100) of a rotary electric machine comprising at least three blades (101) in which at least one property of the blades is, following the circumference of the fan in a given direction, gradual for at least three consecutive blades, the property being chosen from the group including: a spacing angle (102) between a straight line passing through a characteristic point (103) of a blade and an axis of rotation of the fan (104), and a straight line passing through a corresponding characterising point (105) of an adjacent blade and the axis of rotation of the fan; a height of the blade; a length of the blade; and an angle of inclination between a straight line passing through two characteristic points of a blade and a straight line passing through two corresponding characteristic points of an adjacent blade.

Abstract: A vibration-proofed fan frame includes a housing and a base surrounded by the housing. A hollow tube is arranged on the base and has the rotary connection with an impeller of the heat dissipation fan. The base includes a disc and a plurality of ribs extending outwards from periphery of the disc. The fan frame further includes a buffer member within the structural interconnections between the disc and the housing. The buffer member includes first elements. The first elements are embedded in the disc. A heat dissipation fan having the fan frame described is also presented.

Abstract: A blower (2) comprising: (a) a rotor (6) including: (i) a magnet (12) and (ii) a shaft (16) including a recess on an end of the shaft (16); (b) a stator (20) that at least partially extends within the rotor (6); and (c) a compliant member (26); wherein the compliant member (26) extends into the recess and the compliant member (26) is compliant so that the compliant member (26) allows the shaft (16) to move.

Abstract: The present invention regards a fluid actuator arrangement comprising a first and second cylinder of a cylinder arrangement, a piston rod arrangement, a first and second piston device associated with the piston rod arrangement, wherein respective first and second piston device divides respective first and second cylinder into a first and second chamber provided for connection to a valve device of a fluid supply device. The first piston device comprises a piston rod engagement and disengagement device, which is adapted to engage or disengage the first piston device to/from the piston rod arrangement. The invention can be put into use for aircraft, such as commercial aircraft designed for long distance flights, for construction industry, jacking systems for oil well drilling and service platforms, agricultural equipment industry, marine industry, crane manufacture industry, and others.

Abstract: A linear actuator system includes a linear actuator and at least one integrated pump assembly connected to the linear actuator to provide fluid to operate the linear actuator. The integrated pump assembly includes a pump with at least one fluid driver comprising a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from a first port of the pump to a second port of the pump. The pump assembly also includes two valve assembles to isolate the pump from the system. The linear actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover to exclusively adjust at least one of a flow and a pressure in the linear actuator system to an operational set point.

Abstract: A valve modular system, comprising individual block components (1 to 4), each of which has a plurality of emerging connection points on at least one part of the free end faces thereof, for the purpose of holding connection components, such as insert valves (29, 35), pressure balances, nozzle or screen inserts (43), fluid lines, blind plugs (13, 15), pressure and temperature displays, hydraulic accumulators (9) and comparable fluid-influencing or fluid-evaluating or fluid-storing components, and which abut each other with the adjacent end faces (11) thereof in a longitudinal direction, in pairs, to form a longitudinal linkage and in this respect are connected at least partially to each other in a fluid-guiding manner, is characterised in that transversely to the longitudinal linkage at least one further block component (45, 49, 51, 59) is placed on at least one of the other block components (1 to 4) to form a vertical linkage in a fluid-guiding manner.

Abstract: This disclosure provides a valve actuator that has improved durability and efficiency. The valve actuator includes a housing cylinder having a pinion centrally located, running perpendicular to the cylinder, secured at the top with a circlip, sealed with o-rings and friction reducing bearings both at the top and bottom. A pair of pistons with linear gear teeth mates to opposite sides of the pinion and seals against the cylinder's interior with o-rings and friction reducing bearings. A cam, connected to the central pinion is stopped by bolts run into the cylinder at the end of both closing and opening strokes. The body is sealed with two endcaps having internal o-rings and secured with cap screws.

Abstract: A cylinder guide mechanism includes a floating bush, a holding part that holds the floating bush, and a linear guide. When a working fluid is supplied in a tube and a piston rod moves back and forth, the floating bush and a guide member of the linear guide move back and forth in the same direction. At this time, a slider of the linear guide is displaced relative to the guide member by retaining the same position. The slider is connected to the tube via an L-bracket.

Abstract: A synthetic jet includes a casing, a vibrating membrane and a guiding channel. The casing has a chamber. The casing has an inlet and an outlet opposite to each other. The inlet and the outlet communicate with the chamber. The chamber is configured to accommodate gas. The outlet corresponds to a heat source. The vibrating membrane isolates and divides the chamber into a first subsidiary chamber and a second subsidiary chamber. The inlet communicates with the first subsidiary chamber. The second subsidiary chamber has a second subsidiary chamber opening communicating with the outlet. The guiding channel communicates with the first subsidiary chamber and the outlet. When being driven, the vibrating membrane reciprocally deforms towards the first subsidiary chamber and the second subsidiary chamber.