Abstract: A main shaft fixture for fixing a main shaft on a wind turbine during installation and repair work on heavy parts of the wind turbine nacelle, in the case where the fixture is formed of several sections for mounting on stable structural parts in the nacelle, including the nacelle's bottom frame. The main shaft fixture has adjustable pressure mandrels with tap shoes, which cause the fixture to be usable regardless of the turbine main shaft geometry, such that it can be mounted without fixing the rotor. The main shaft fixture also has facilities for mounting of a lightweight crane and a self-hoisting crane with a ground-based winch, respectively, as well as a rotor lock which, in combination with actuators of the main shaft fixture, enables the main shaft and the main shaft bearing to be sufficiently displaced vertically from its bearing in the nacelle to service or replace the bearing.

Abstract: Solar chimney and method for generating power by the solar chimney are provided. The solar chimney includes a chimney a heat absorbing surface; a transparent cover located above the surface and forming an air pathway with the surface to the entrance to the chimney; one or more integrated turbine-generators at or before the entrance to the chimney for producing electrical power; and a focusing lens focusing solar radiation on a heat exchanging element to heat air at or just before the entrance to the chimney as it flows to the one or more turbines.

Abstract: An actuation mechanism used in, for example, a missile assembly is disclosed, as are methods of its use. The actuation mechanism is locked in a first orientation and is unlocked in a second orientation. Locking and unlocking of the actuation mechanism is achieved by way of a locking mechanism that responds to a certain stimulus. In some embodiments, the actuation mechanism is incorporated into a sub-assembly of a missile to assist in controlling the missile's flight.

Abstract: A microthruster system may include a substrate and a source film. The substrate may include a plurality of emitter tips, and a source film deposited on the substrate. The source film may include silver. The microthruster system may also include a solid electrolyte film, which may include chalcogenide film, deposited over the source film. The solid electrolyte film may cause ions of the source film to move to the plurality of emitter tips.

Abstract: A piston pump including a cylinder body having an internal fluid chamber, a piston configured to axially cycle within the cylinder body, an inlet valve, an outlet valve, an annular seal positioned between the piston and cylinder body, a barrier fluid pocket formed in the cylinder body adjacent one end of the annular seal, and a barrier fluid contained within the barrier fluid pocket, the barrier fluid preventing suspended solids in pumped fluid from contacting the annular seal.

Abstract: Disclosed is a supplying device of fixed colorants volume for a colorant dispenser. The supply device includes: a colorant source; a cylinder body having multiple piston cylinders arranged around a circumferential direction thereof; a swashplate having an oblique surface and arranged substantially coaxially with the cylinder body; multiple piston mechanisms, where each piston mechanism includes a piston rod and a piston connected to the piston rod, the piston rod has a rolling abutment structure abutting against the oblique surface, and the piston is constructed to be capable of making a stroke movement in the corresponding piston cylinder by means of rotation of the swashplate; an actuator for actuating the swashplate; a controller operatively connected to the actuator to control the amount of rotation of the swashplate; and an outlet for dispensing a colorant. Preferably, the supply device further includes an axial reset mechanism and a circumferential reset mechanism.

Abstract: A high-pressure fuel pump capable of reducing the number of components and decreasing the manufacturing cost by processing of a pump body is provided. The high-pressure fuel pump includes a metal damper, a pump body in which a damper housing that houses the metal damper is formed, a damper cover attached to the pump body, covering the damper housing, and holding the metal damper between the pump body and the damper cover, and a holding member fixed to the damper cover and holding the metal damper from a side opposite to the damper cover. The holding member is provided with an elastic portion that urges the pump body so that the metal damper is urged toward the damper cover.

Abstract: A motor-driven apparatus includes a pump and a servo motor connected respectively to outer sides of opposed upstanding support plates. A pump shaft and a servo motor shaft extend horizontally toward each other into a space between the support plates and are coupled together by a flexible coupling. The servo motor includes a fan cover enclosing and spaced from a motor frame of the servo motor. A cooling fan disposed inside the fan cover circulates air in the space between the fan cover and the motor frame to air-cool the motor frame.

Abstract: A micro-fluidic device. The device includes a semiconductor substrate attached to a fluid supply source. The substrate contains at least one vaporization heater, one or more bubble pumps for feeding fluid from the fluid supply source to the at least one vaporization heater, a fluid supply inlet from the fluid supply source in fluid flow communication with each of the one or more bubble pumps, and a vapor outlet in vapor flow communication with the at least one vaporization heater. The one or more bubble pumps each have a fluid flow path selected from a linear path, a spiral path, a circuitous path, and a combination thereof from the supply inlet to the at least one vaporization heater.

Abstract: A compressor may include a hermetic case to store oil in a lower portion thereof, a compression mechanism part to compress a refrigerant, a power train part to generate a driving force, a rotational shaft to transmit the driving force generated from the power train part to the compression mechanism part and including a hollow portion and a female screw part formed at the hollow portion, and an oil pumping member inserted into the hollow portion of the rotational shaft and including an oil pumping part which moves the oil stored in the lower portion of the hermetic case up and a male screw part which is coupled to the female screw part of the rotational shaft. Since the oil pumping member and the rotational shaft are firmly coupled to each other, the reliability of the oil supplying is improved.

Abstract: A pump for reducing agents of an exhaust gas purification system for an internal combustion engine of a motor vehicle includes: a diaphragm carrier; a diaphragm arranged on the diaphragm carrier, the diaphragm having a radially outer collar; and a pump housing configured to secure the radially outer collar of the diaphragm. The radially outer collar of the diaphragm has a reinforcing ring.

Abstract: A miniature pneumatic device includes a miniature fluid control device and a miniature valve device. The miniature fluid control device includes a gas inlet plate, a resonance plate, a piezoelectric actuator and a gas collecting plate. A first chamber is formed between the resonance plate and the piezoelectric actuator. After a gas is fed into the gas inlet plate, the gas is transferred to the first chamber through the resonance plate and then transferred downwardly. Consequently, a pressure gradient is generated to continuously push the gas. The miniature valve device includes a valve plate and a gas outlet plate. After the gas is transferred from the miniature fluid control device to the miniature valve device, the valve opening of the valve plate is correspondingly opened or closed and the gas is transferred in one direction. Consequently, a pressure-collecting operation or a pressure-releasing operation is selectively performed.

Abstract: The present invention concerns a diaphragm pump comprising a delivery chamber separated from a hydraulic chamber by way of a diaphragm, wherein the delivery chamber is respectively connected to a suction connection and a pressure connection and the hydraulic chamber which can be filled with a working fluid can be acted upon with a pulsating working fluid pressure and the diaphragm can be reciprocated between a pressure position in which the volume of the delivery chamber is smaller and a suction position in which the volume of the delivery chamber is larger.

Abstract: The utility belongs to the field of the non-beam pumping unit, specifically relating to a non-beam pumping unit driven by a motor reduction unit. The non-beam pumping unit driven by a motor reduction unit comprises a base, a tower body and a drive mechanism. The drive mechanism is mounted on the platform, comprising a motor reduction unit, a large roller, a small roller, a belt and a counterweight device. The motor reduction unit drives the large roller to rotate by a coupling, and one end of the belt is connected with a beam hanger and the other end hangs down after wrapping around the large roller and the small roller from the upper side and then connected with the counterweight device. The motor reduction unit is composed of a motor and a planetary gear reducer in series.

Abstract: A well pump assembly has a barrel, a standing valve at an upper end of a standing valve chamber, and a plunger. A travelling valve admits well fluid into the barrel during a fill stroke. The travelling valve closes during a power stroke so that the plunger pushes well fluid from the barrel into the standing valve chamber. A gas release port extends from the standing valve chamber to the exterior of the pump assembly. A check valve in the gas release port has an outward flow blocking position for blocking liquid well fluid in the standing valve chamber from exiting through the gas release port while the plunger is in the power stroke. The cheek valve has a gas release position that enables gas present in the standing valve chamber to flow out the gas release port while the plunger is in the power stroke.

Abstract: A variable-capacity compressor that includes a housing having an inlet for receipt of refrigerant and an outlet for return of refrigerant, and a plurality of compressing elements contained in the housing between the inlet and the outlet. The variable capacity compressor includes a valve having an electrical control. The valve is dedicated to fewer than all of the compressing elements. The valve is movable between a first state which communicates refrigerant flow to the compressing elements, and a second state that reduces or stops flow to the compressing elements. In an embodiment of the invention, an unloading controller has an operational modulation mode that includes cycling the valve between on and off states to provide a portion of compressor capacity. The unloading controller is further programmed to provide a minimum delay time between transitions between the first and second states, but no maximum dwell time between transitions.

Abstract: A method for bypassing a float switch controlling a water pump having the steps of providing a water pump having a discharge port. The water pump is hydraulically connected to a water supply. The water supply has a float switch electrically connected to a pressure switch. The pressure switch is hydraulically connected to a discharge port of the water pump. The pressure switch is electrically connected to a manually operated switch. The float switch opens an electrical circuit to the water pump when the float switch senses a low water supply. The manually operated switch manually closes the electrical circuit to the water pump when the float switch has an open circuit which causes the water pump to operate when the supply water level is low.

Abstract: A damping assembly for a valve is provided. The valve is configured to move between an open position and a close position. The valve includes a valve element and a valve stem disposed within a head. The damping assembly includes a damping chamber defined within the head. The damping assembly defines a sidewall. The damping assembly also includes a collar configured to receive the valve stem. The collar includes a collar stem. The collar also includes a collar head having an outer diameter. The collar head includes a side surface. The damping assembly includes a liquid passageway. The liquid passageway is being defined by a radial clearance between the side surface of the collar head and the sidewall of the damping chamber. The liquid passageway is configured to control a flow of a liquid as the valve moves between the open position and the closed position.

Abstract: A compressor discharge system, operable to output a flow of compressed air to a service line at a system pressure, includes a compressor operable to produce a flow of compressed air at a discharge pressure. The system also includes a filter positioned downstream of the compressor and operable to receive the flow of compressed air at about the discharge pressure and discharge the flow of compressed air at a filter pressure. The system also includes a control assembly including an actuator and a variable sized orifice movable between a first, open position and a second, restricted position, the variable orifice positioned to receive the flow of compressed air at about the filter pressure and to discharge the flow of compressed air at the system pressure. The actuator is operable in response to pressure feedback in the customer service line to move the orifice to the restricted position.

Abstract: A method for detecting a leak in a pump comprises: monitoring discharge pressure time domain signals of the pump; monitoring piston position time domain signals for each piston of a plurality of pistons; filtering the monitored discharge pressure time domain signals and the monitored piston position time domain signals of each piston of the plurality of pistons via a band pass filter; determining, at each pump revolution for each piston, a sum of product of the filtered discharge pressure time domain signals and the filtered piston position time domain signals; determine, at each pump revolution for each piston, an absolute value of each sum; determining, at each pump revolution, a largest absolute value of the determined absolute values; determining a corresponding piston of the plurality of pistons associated with the largest absolute value; and determining a cylinder of the pump associated with the determined corresponding piston as leaking.

Abstract: A fluid end assembly comprising: a housing, valves, seals, seats, springs, plungers, plunger packing, and other associated parts, paired with a suction manifold that facilitates fluid feeding through a centrally located external suction intake. The suction manifold of this invention is designed to preserve fluid energy that will ensure complete filling of the cylinder in extreme pumping conditions. The suction manifold utilizes a chamber design positioned immediately below the suction valves, eliminating all connecting ducts. The design of the manifold of this invention can be easily fabricated utilizing commercially available steel plate, pipe, and pipe fittings.

Abstract: A system may be operable to circulate a working fluid between first and second heat exchangers. The system may include a suction line, a low-side compressor, a high-side compressor and a discharge line. The low-side and high-side compressors may both be in fluid communication with the suction and discharge lines.

Abstract: A compressor may include a first scroll, a second scroll and a modulation system. The first scroll may include a first endplate and a first spiral wrap. The second scroll may include a second endplate and a second spiral wrap interleaved with the first spiral wrap and cooperating to form a plurality of working fluid pockets therebetween. The modulation system may include a temperature-responsive displacement member that actuates in response to a temperature within a space rising above a predetermined threshold. Actuation of the displacement member may be controlled to control a capacity of the compressor.

Abstract: A compressor is provided and may include a shell, a motor assembly, a compression mechanism, a pump housing, and at least one pump. The shell includes a fluid disposed therein. The motor assembly is disposed within the shell and is drivingly engaged with a driveshaft. The compression mechanism is driven by the driveshaft. The pump housing is rotatably disposed within the shell for rotation relative to the driveshaft and relative to the shell. The at least one pump is rotatably disposed within the pump housing such that the at least one pump is in driving engagement with the driveshaft.

Abstract: A compressor includes a housing, a partition, a first scroll, a second scroll, and a thermal protection system. The partition is disposed within the housing and defines a suction chamber and a discharge chamber. The partition includes a discharge passage in fluid communication with the discharge chamber. The thermal protection system includes a positioning body and a displacement member. The positioning body is coupled to the second scroll and translatably disposed within the discharge passage. The displacement member is disposed between the positioning body and the partition and configured to translate the second scroll relative to the first scroll between first and second positions.

Abstract: The invention relates to an impeller (1), in particular for a side channel machine, comprising blades (5) arranged distributed in the circumferential direction and formed in each case by a blade wall (6), which blades form open blade chambers (4) in a plan view onto the impeller (1), wherein a blade wall (6) in the plan view starts at a first radius dimension (r1) related to the geometrical impeller rotation axis (x), which first radius dimension (r1) corresponds to half or more than half of a second radius dimension (r2), which second radius dimension (r2) defines a circumferential rim edge (9) of the impeller (1), and wherein the radius dimension (r1) defines a radially inner boundary wall (7) of the blade chamber (4), wherein furthermore a blade wall (6) comprises an exposed upper terminating edge, which runs correspondingly radially on the inside into the inner boundary wall (7) and ends radially on the outside in plan view, wherein an imaginary connecting line (V) can be drawn between a run-in point of t

Abstract: Modules for protecting pumps are provided having a sensor detecting leaks of the pump seal, a sensor detecting rain and/or a sensor detecting that the pump is running dry and thus is overheated. Each sensor communicates with a circuitry configured to shut down the pump until the problem is resolved and to send a notice or alarm to a person or a system. A reset button may be provided to override the shutdown of the pump by the circuitry. Methods of using the modules are also provided.

Abstract: A fluid flow machine, includes a main flow path formed by a hub and a housing, an arrangement of rotating blades in the main flow path to supply energy to the fluid, forming a rotor assembly group, an arrangement of resting blades arranged adjacent to the rotor in the main flow path, forming a stator assembly group, wherein respectively one rotor assembly group and one stator assembly group adjacent thereto form a stage of the fluid flow machine. In at least one stage, the averaged blade profile angles ?RI, ?RE of the rotor assembly group, the averaged blade profile angles ?SI, ?SE of the stator assembly group, as well as the course of the cross-sectional areas of the main flow path in a downstream direction are selected such that they fulfill a certain relationship to increase the realizable level of efficient work to be supplied.

Abstract: A turbomachine arrangement includes a housing, a turbo-expander formed with an expander rotor, a turbo-compressor formed with a first compressor rotor, and a shaft that is rotatably mounted on the housing. The shaft connects the expander rotor to the compressor rotor. The first turbo-compressor can be driven exclusively by the turbo-expander. A second turbo-compressor having a second compressor rotor is disposed on the housing such that the second compressor rotor is connected to the first turbo-compressor in parallel or in series. The second compressor rotor is driven via a transmission accommodated in the housing and via a drive shaft connecting the transmission to the second compressor rotor.

Abstract: An axial flow fan includes an impeller having a hub and vanes disposed at equal intervals on an outer peripheral portion of the hub; a rotor shaft located at the center of the impeller; a motor portion rotating the impeller around the rotor shaft as an axis; a casing surrounding an outer periphery of the impeller; a base portion supporting the motor portion; and a stationary blade located in a blowout opening side of air flow, the stationary blade connecting the base portion and the casing, wherein the stationary blade has on its surface a guide portion allowing air flow flowing along the surface to be rectified and guided from a direction of the blowout opening to an outside.

Abstract: A submersible pump is provided featuring: a motor; run/start capacitors having run/start capacitor connectors; a housing having a motor housing portion and a run/start capacitor housing portion separated by a housing wall, the motor housing portion having a motor housing chamber to receive/contain the motor and oil for immersing the motor in an oil bath, the run/start housing portion having a run/start housing chamber, the housing wall having connection ports to allow sealed connections between electrical components in the motor housing portion and the run/start capacitor housing portion; a removable motor housing cover to couple/close the motor housing portion; a removable run/start capacitor housing cover to couple/close the run/start capacitor housing portion; and a capacitive cup having a side wall portion and a bottom wall portion, to be removeably arranged in the run/start capacitor housing chamber, the bottom wall portion to mount the run/start capacitors to be contained/surrounded by the side wall por

Abstract: A dual compressor turbocharger includes two compressors. One compressor supplies fuel pressure, and one compressor supplies air pressure. The dual compressor turbocharger includes a turbine driven by exhaust of an engine and a shaft coupled to the turbine. The first compressor is mounted on the shaft and includes a first inlet coupled to an air supply and a first outlet coupled to an air intake of the engine. The second compressor is mounted on the shaft and includes a second inlet coupled to a fuel supply and a second outlet coupled to a fuel supply rail of the engine.

Abstract: An apparatus for preventing an axial-flow compressor from stalling by employing a casing treatment includes an outer casing having an inner wall with a slot formed to face a rotor blade, an inner casing moveable so as to open the slot in an unstable operating region and close the slot of the outer casing in a stable operating region, and a drive means for moving the inner casing along the axial direction of the outer casing. Thus, the apparatus can be applied not only to a casing treatment structure where the slope of a slot does not vary with the rotational position of the rotor, but also to a casing with a variously shaped slot such as a radial slot or an axial skewed slot.

Abstract: A compressor is described which includes a non-axial first rotor, and a second rotor disposed immediately downstream from the first rotor and being co-axial therewith about a longitudinal axis of rotation. The second rotor rotates in a direction opposite the non-axial first rotor to discharge fluid flow into an uninterrupted passage between an outlet of the second rotor and one of a downstream combustor or a further compression stage. The uninterrupted passage is free of a diffusing passage. A gas turbine engine including such a compressor and a method of compressing fluid flow is also described.

Abstract: In accordance with certain presently disclosed embodiments, a multidirectional fan is provided. In certain embodiments, the multidirectional fan comprises a back plate having an interior surface and a central opening; a hub located around the central opening and projecting from the interior surface of the back plate; a plurality of flexible fan blades extending radially from the hub, wherein each flexible fan blade comprises a base and a blade, and wherein the base of each flexible fan blade is attached to the hub and the interior surface of the back plate; and a plurality of fasteners located at least partially on the interior surface of the back plate, wherein each fastener secures the blade of at least one flexible fan blade to the interior surface of the back plate at a predetermined position.

Abstract: An improved variable geometry diffuser (VGD) mechanism for use with a centrifugal compressor. This VGD mechanism extends substantially completely into the diffuser gap so that the VGD mechanism may be used more fully to control other operational functions. The VGD mechanism may be used to minimize compressor backspin and associated transient loads during compressor shut down by preventing a reverse flow of refrigerant gas through the diffuser gap during compressor shutdown, which is prevented because the diffuser gap is substantially blocked by the full extension of the diffuser ring. During start-up, transient surge and stall also can be effectively eliminated as gas flow through the diffuser gap can be impeded as load and impeller speed increase, thereby alleviating the problems caused by startup loads at low speeds. The VGD mechanism can be used for capacity control as well so as to achieve more effective turndown at low loads.

Abstract: A turbofan engine including an axially extending inlet wall surrounding an inlet flow path. A radial distance between the inlet wall and the inner wall adjacent the fan defines a downstream height of the inlet flow path. A plurality of vanes are circumferentially spaced around the inlet, each of the vanes extending radially inwardly from the inlet wall, a maximum radial distance between a tip of each of the vanes and the inlet wall defining a maximum height of the vane. The maximum height of the vane is at most 50% of the downstream height of the flow path. In another embodiment, the maximum height of the vane is at most 50% of the maximum fan blade span. A method of reducing a relative Mach number at fan blade tips is also discussed.

Abstract: An electric compressor for compressing a gas, and in particular, an electric compressor for a motor vehicle comprising a compressor wheel, an electric motor, wherein the compressor wheel can be driven by the electric motor, a control unit, wherein the electric motor can be controlled by the control unit, and a housing having at least one open end for receiving the control unit. The housing has at least one recess on the inner circumference at the open end that is designed so as to be open in the direction of the housing interior. The control unit can be inserted into the housing in such a way that it closes the open end of the housing and the recess on the inner circumference.

Abstract: A guide vane for a dual flow aircraft turbine engine includes an aerodynamic part. The aerodynamic part includes an inner duct for lubricant cooling extending in a main direction and being partly bounded by a pressure side wall and a suction side wall of the vane. The aerodynamic part is embodied as a single piece, and includes heat transfer fins arranged in the duct expanding substantially parallel to a direction of the duct. The fins are spaced from each other depending on the direction of the duct and a transversal direction of the vane, so that at least some of the fins are arranged substantially staggered.

Abstract: An air flow-enhancing insert (30) is configured to be inserted into the air inlet (16) of a compressor (3). The insert includes a hollow, cylindrical inner member (32) and lugs (44) protruding outward from an outer surface (36) of the inner member, each lug having an elongated cross sectional shape and including a leading edge (46), a trailing edge (48), and a long axis (50) that extends between the leading edge and trailing edge, the long axis defining a helix about the outer surface. When the insert (30) is disposed in the compressor air inlet, an air recirculation path (20) is defined between the inner member outer surface, an inner surface (17) of the air inlet, and the lugs. The air recirculation path improves air flow in the compressor, whereby compressor efficiency is improved and noise is reduced.

Abstract: A device for dispensing an air treatment chemical includes a housing having an inlet for permitting air to enter into an interior space of the housing and an outlet for permitting air mixed with air treatment chemical to exit the interior space of the housing. A substrate positioned within the housing bears the air treatment chemical. A power supply mounted within the housing powers a motor mounted within the housing. The motor is connected to an impeller mounted within the housing. The impeller moves air from the inlet adjacent the substrate to mix the air treatment chemical into the moving air and deliver the mixture of air and air treatment chemical through the outlet to outside of the housing. The housing includes a transitional body defining a convergent-divergent channel for compressing the mixture at the converging section and expanding the mixture at the diverging section.

Abstract: A hydraulic suspension system includes a suspension cylinder, a pump, and a control valve therebetween. The control valve includes a spool reciprocally movable between a pump flow position and a tank flow position in which a control port of the control valve is in communication with a pump and a tank, respectively. A piloted logic element in fluid communication with and interposed between the control valve and the suspension cylinder is selectively movable between a through-flow position in which fluid can flow in either direction between a chamber of the suspension cylinder and the control port of the control valve and a blocked position in which fluid is prevented from flowing in or out of the chamber of the suspension cylinder. The logic element is biased to the blocking position, moving to the through-flow position when subjected to a crack pressure delivered from the control port of the control valve.

Abstract: A hydraulic system for a work machine includes a first switch valve and a first return circuit. The first switch valve is switchable between a confluent position and an isolation position. The first switch valve is switched to the confluent position such that a first operation fluid tube is connected to a second operation fluid tube and a first transmission fluid tube is connected to a second transmission fluid tube. The first switch valve is switched to the isolation position such that the first operation fluid tube is disconnected from the second operation fluid tube and the first operation fluid tube is disconnected from the second operation fluid tube.

Abstract: A mobile apparatus with a fluid pressure-operated implement mounted at a distal end of a boom includes a connection apparatus for selectively rotating the implement about an actuator axis at the distal end of the boom. The connection apparatus includes a rotary actuator and a pressurized fluid circuit for delivery of pressurized fluid through the rotary actuator to the implement. The pressurized fluid circuit includes channels establishing a fluidic connection axially through the rotating shaft of the rotary actuator. The pressurized fluid circuit facilitates passage of pressurized fluid through an internal, protected environment to the implement.

Abstract: The disclosure relates to exemplary embodiments for a combination device configured to effect lockout and partial stroke testing for an actuator having a piston rod providing linear motion and connected to a guide block in an actuator, wherein the combination device includes a device housing having a housing bore, wherein the device housing is adapted to mount on a receptacle on the actuator that aligns a device housing bore coaxially to the translatory motion axis of the piston rod; an extension rod attached to the guide block connected to the piston rod; at least two slides or a profiled bore index sleeve disposed in the device housing that when engaged provide means of restraining the movement of the extension rod in a manner that prevents said extension rod and a driver element of the actuator from rotating, relative to an actuator housing; a housing cover mounted over the device housing wherein the housing cover protects and retains the extension rod, and the slides or the index sleeve in the device hous

Abstract: A work vehicle includes a work implement, a valve adjusting a flow rate of a hydraulic oil operating the work implement, an electromagnetic proportional control valve generating a pilot pressure guided to the valve, a controller outputting a current to the electromagnetic proportional control valve, and a sensor for detecting an operation of the work implement. The controller increases stepwise a current value of a current output to the electromagnetic proportional control valve by repeating processing for temporarily lowering a current value of the current output to the electromagnetic proportional control valve and thereafter outputting to the electromagnetic proportional control valve, a current having a current value greater than the current value before lowering. The controller calibrates data for predicting an operation speed of the work implement based on a result of detection by the sensor at the time when the current value is increased stepwise.

Abstract: A damping device, in particular for damping or avoiding pressure surges, such as pulses, in hydraulic supply circuits, preferably in the form of a silencer, has a damping housing surrounding a damping chamber and having a fluid inlet (3) and a fluid outlet (5). A fluid receiving chamber (7) extends between the fluid inlet and the fluid outlet. A fluid flow crosses the damping chamber in a throughflow direction (11) from the fluid inlet (3) to the fluid outlet (5). Parts of the fluid receiving chamber (7) extend transversely with respect to the throughflow direction (11). The fluid receiving chamber (7) immediately adjoins the fluid inlet (3) and the fluid outlet (5). A guide element (51) is provided in the damping chamber. The fluid flow flows against the guide element changing the flow speed of the flow at least in sections.

Abstract: The present disclosure is directed towards electro-fluid transducers that may influence the flow of a fluid in and around a channel. In one such embodiment, a system comprises a first electrode at least partially encapsulated by a first dielectric; a second electrode at least partially encapsulated by a second dielectric, wherein a portion of a channel exists between the first dielectric and the second dielectric; a third electrode positioned in the channel; and a fourth electrode positioned in the channel, wherein the electrodes influence a flow of a fluid in the channel upon the electrodes being energized.

Abstract: A flow conditioner comprising a perforated plate with a central hole and four or more circular paths, which are arranged radially from the central hole and concentrically with one another, wherein holes are arranged on these concentric circular paths, characterized in that a preponderate number of holes of an intermediate circular path have a greater hole diameter than a preponderate number of holes of the innermost and a preponderate number of holes of the outermost circular paths.

Abstract: A construction system uses a comb connector element in combination with flat or generally planar polygonal shapes of various types. The comb connector elements connect to the edges of the planar polygonal shapes. Each comb connector has at least one pair of connector members. Each connector member has a proximal end connected to the polygonal member, and a distal end. Each connector member having a face portion that includes a recess extending from a central region of the face portion. The recess extends to the distal end of the face member.