Abstract: A method (800,900) of assembling or disassembling a rotor blade of a wind turbine, the wind turbine comprising a tower, a nacelle mounted on the tower and a rotor coupled to the nacelle, the rotor having a rotor hub and a rotor blade, the rotor blade comprising a first blade segment connected with the rotor hub, a second blade segment, wherein the second blade segment is configured for joining to the first blade segment such that the second blade segment extends from the first blade segment towards a blade tip of the rotor blade, and a releasable locking device configured for joining the second blade segment to the first blade segment, the releasable locking device comprising a structural member of the second blade segment, the structural member being configured for engaging a further structural member of the first blade segment for releasable locking with the further structural member, wherein a fastening device of the second blade segment is arranged on the structural member; the method comprising raising (

Abstract: The present disclosure relates to a wind turbine (10) comprising a wind turbine tower (15), a nacelle including a primary frame (110), wherein the primary frame is connected to the tower (15). The wind turbine further comprises a secondary structure (120) connected to the primary frame (110) and one or more flexible couplings (130) between the primary frame (110) and the secondary structure (120) configured to reduce transmission of deformations from the primary frame (110) to the secondary structure (120). The present disclosure also relates to secondary structures (120) configured to be connected to primary frames (110) and to methods (500) for refurbishing a secondary structure (120) of a wind turbine (10).

Abstract: A support system may secure a wind turbine above an angled roof. The angled roof may have a first angled surface, an opposite second angled surface, and a peak between the first angled surface and the second angled surface. The support surface may have a first weighted ballast located along a portion of the first angled surface and a second weighted ballast located along a portion of the second angled surface. The support system may have a connector extending between and connecting a portion of the first weighted ballast and a portion of the second weighted ballast. The connector may extend over the peak. The support system may have a mounting portion on the connector for securing a wind turbine to the connector. The first weighted ballast and the second weighted ballast may be sized and weighted to maintain the wind turbine above the peak during wind conditions.

Abstract: A method for producing a component of a sliding bearing includes a) providing a metal bolt with a cylindrical lateral surface and two end faces; b) coating the lateral surface of the bolt with a soldering flux or solder material; c) providing a metal sheet made of bronze and forming it into a cylindrical sleeve having a longitudinal slot, wherein a first side of the metal sheet forming an inside is coated with a solder material or a soldering flux before or after the forming process, either the lateral surface of the bolt or the inside of the sleeve having soldering flux; d) sliding the sleeve onto the lateral surface of the bolt; e) integrally bonding the lateral surface and the sleeve soldering; f) optionally closing the longitudinal slot by welding; and g) optionally machining a second side of the metal sheet facing away from the bolt.

Abstract: A method is described for the early identification of material fatigue in drive train components of a wind turbine installation. In particular, a signal, representing revolutions per minute of a wind turbine shaft, is obtained and modulated by the azimuth angle measurement of the turbine blade. This signal is band passed at twice the frequency of rotation and Fourier transformed to extract amplitude values. An alert response can then be triggered when it is determined that there has been a change in a characteristic of the amplitude values such as the amplitude values increasing beyond a multiple of a determined baseline amplitude value.

Abstract: A method for repairing or improving a lightning protection system of a rotor blade of a wind turbine having a blade root and a blade tip includes identifying a repair or improvement location in the lightning protection system of the rotor blade. The method includes removing one or more layers of material at the repair or improvement location that form part of a shell of the rotor blade so as to expose existing conductive material in the rotor blade. The method also includes placing a conductive layer of material atop the repair or improvement location such that a root-side edge of the conductive layer overlaps the existing conductive material. Moreover, the method includes electrically connecting the root-side edge of the conductive layer with the existing conductive material and a tip-side edge of the conductive layer of material with the blade tip. The method further includes covering the conductive layer with an outer covering.

Abstract: A method of determining a value of a pitch speed for a pitch actuator of at least one rotor blade of a wind turbine includes: providing a quantity being indicative of a value of a bearing moment of the rotor blade; determining the value of a pitch speed based on the quantity and a reference quantity indicative of a reference value of the bearing moment of the rotor blade such that, if the quantity indicates that the value of a bearing moment of the rotor blade is below the reference value of the bearing moment of the rotor blade, the value of a pitch speed is determined to be above a reference value of the pitch speed.

Abstract: A carbon negative clean fuel production system includes: a main platform; a heat collection device for capturing heat from a hydrothermal emissions from a hydrothermal vent on a floor of an ocean; a heat-driven electric generator; a heat distribution system including a heat absorbing material and a heat transporting pipe; anchor platforms tethered to the main platform; a mineral separator; a seawater filtration unit; a water splitting device; a sand refinery machine; a carbon removal system; and a chemical production system for producing hydrides, halides and silane. Also disclosed is a method for carbon negative clean fuel production, including: capturing heat; producing electric energy; separating minerals; filtering seawater; splitting water; refining sand; removing carbon dioxide; and producing hydrides, halides, and silane.

Abstract: A cradle bearing for supporting a swashplate of a variable hydraulic axial piston. The cradle bearing is of an angular ball bearing type or includes, with respect to the bearing axis, a tapered inner race and/or a tapered outer race. A swashplate for a variable hydraulic axial piston unit including a first and a second cradle bearing zone spaced to each other in axial direction of a swashplate tilt axis, suitable for supporting the swashplate in a housing of a variable hydraulic axial piston unit, wherein the first cradle bearing zone is inclined with respect to the swashplate tilt axis. A variable hydraulic axial piston unit of the swashplate type including a swashplate which is supported rotatable in the housing of the variable hydraulic axial piston unit at a first bearing zone by a tapered bearing and at a second bearing zone by regular cylindrical cradle bearing or a journal bearing whose axis is aligned with the swashplate tilt axis.

Abstract: A valve includes a valve body having a valve plunger barrel formed therein and configured to be mounted to a pump head of a fuel pump, a valve plunger arranged to perform reciprocal motion with respect to the valve plunger barrel, a drive assembly configured to cause the valve plunger to perform reciprocal motion, and a spacer configured to couple to the valve plunger to perform reciprocal motion together with the valve plunger and configured to interface with the pump head. The spacer has a spacer body with first and second opposing spacer surfaces and with a central aperture extending from the first to the second spacer surface and configured to receive the valve plunger therethrough. At least one of the first and second spacer surfaces includes one or more grooves recessed into the spacer body to reduce or inhibit cavitation of the interface of the spacer and pump head.

Abstract: A positive displacement machine includes a housing including a tubular guide part in which a pressure chamber is provided, a slide member including a piston disposed in the guide part, the slide member sliding in a first direction, a coupling member coupled to the slide member and extending in a second direction intersecting the first direction, a first rotating member coupled to a first end portion of the coupling member and configured to rotate centering on a first rotation axis extending in the second direction, and a first motor. The first motor includes a first rotor coupled to the first rotating member and configured to rotate centering on the first rotation axis and an adjuster configured to adjust a position of the first rotor with respect to the housing, the position extending along an imaginary plane perpendicular to the first rotation axis.

Abstract: A multipurpose inflation pump is provided. The multipurpose inflation pump includes a housing provided with a device cavity and a storage cavity which is configured to place an accessory. The device cavity is provided with a first inflation unit and a second inflation unit, and an inflation pressure of the first inflation unit is lower than an inflation pressure of the second inflation unit. The multipurpose inflation pump can not only rapidly inflate and deflate an inflatable bed, an inflatable boat, etc., but also provide higher inflation pressure to inflate an automobile tire, thus combining multiple uses in a single machine and helping consumers save cost.

Abstract: A method can include operating a pump system; determining a condition associated with the pump system; and controlling the pump system based at least in part on the condition.

Abstract: An observed operational state can include an operational state of one or more system devices. A sensor can emit, in response to a detected observable condition reflective of a given operational state, a simulated signal reflective of a different operational state as a proxy for the detected condition. A controller receiving such a proxy signal can, at least partially responsively to the proxy signal, issue a command corresponding to the given operational state. For example, a leak detector can emit in response to a detected leak, or a flow-rate sensor can emit in response to a detected flow-rate of a liquid, a simulated fan-speed tachometer signal representative of a selected fan speed. At least partially in response to observing a simulated tachometer signal, a controller can issue a system command corresponding to an underlying system condition for which the simulated tachometer signal is a proxy.

Abstract: A multi-piece fluid end that can be produced with fewer raw materials and at a lower cost. In one embodiment, a fluid end is formed from a first body attached to a separate second body. Their respective external surfaces may be engaged flushly, partially, or via one or more spacer elements. In some embodiments, the body pieces are flangeless to reduce stress on the fluid end. The second body may have a plurality of bores that are alignable with a plurality of corresponding bores formed in the first body. The second body may be connected to a power end using a plurality of stay rods. In other implementations, more than two body pieces may be utilized.

Abstract: A fluid pump includes an inlet plate and an electric motor. The electric motor has a shaft that rotates about an axis. A pumping arrangement is rotationally coupled to the shaft. The pumping arrangement includes an rotating element. The fluid pump further includes a thrust bearing driver including a disc-like plate having first and second faces, and two posts extending perpendicularly from the first face. The shaft has a terminal end including a pair of slots that cooperate with the posts of the thrust bearing driver. The inner gear rotor has an inner surface including a pair of slots that cooperate with the posts of the thrust bearing driver. The posts of the thrust bearing driver are received in the slots of both the shaft and the rotating element, and the thrust bearing driver is sandwiched between the shaft, the inlet plate, and the rotating element.

Abstract: A pump shaft support structure includes: a crankcase body which rotatably supports a crankshaft of an engine; a pump shaft which interlockingly rotates with the crankshaft; a crankcase cover which covers the crankcase body; a pump cover which is coupled to the crankcase cover to define a pump chamber therebetween; and a pump rotor which is disposed in the pump chamber and engages with the pump shaft. The pump shaft includes: a supported section which is rotatably supported by the pump cover on the other side of the pump chamber from the crankcase cover; and an insertion section adjoining the supported section in an axial direction. The pump cover has a through bore which passes the insertion section of the pump shaft therethrough. The insertion section of the pump shaft has a diameter smaller than that of the supported section.

Abstract: A pump arrangement (1) at least comprising a pump (2) having a pressure side (3) and an intake side (4) and a drive unit (5) for the pump (2) which are arranged in a common housing (6), wherein the drive unit (5) is an axial flow electric drive which comprises a stator (7) which is connected to the housing (6) in a rotationally secure manner and a rotor (8) which is arranged so as to be able to be rotated with respect to the housing (6), wherein the rotor (8) is arranged with a first end face (9) opposite the stator (7) in an axial direction (10) and forms an outer conveying means (11) of the pump (2) and has with spacing from the first end face (9) on an inner circumferential face (12) a first conveying profile (13), wherein in a radial direction (14) inside the rotor (8) there is arranged an inner conveying means (15) of the pump (2) which has on an outer circumferential face (16) a second conveying profile (17) which cooperates with the first conveying profile (13) in order to convey a fluid (18).

Abstract: A method of measuring fluid flow in a system includes providing a fluid supply assembly which includes a fluid supply supplying fluid, a dispensing valve from which the fluid is dispensed, a dispensing line connecting the fluid supply to the dispensing valve, a gear pump including a motor and a gear being rotated by the motor to provide a flow of fluid from the fluid supply to the dispensing line, a revolution counter counting a number of revolutions of an element of the gear pump, a pressure transducer coupled to the dispensing line sensing pressure in the system, and a controller including a processor and a memory to control the system. The method further includes directing fluid from the fluid supply, rotating the gear to provide the flow of fluid from the fluid supply to the dispensing line, and providing a calibration process by modulating the gear pump.

Abstract: A dry vacuum pump has a stator (2) and two rotors (5) that are accommodated in at least one compression chamber (3) of the stator (2), the rotors (5) being configured to rotate synchronously in opposite directions so as to drive a gas to be pumped between an intake and a delivery of the vacuum pump. The rotors (5) and the compression chamber (3) of the stator (2) are coated with a nickel-phosphorus coating (11) comprising between 9% and 14% phosphorus and having a thickness greater than 20 ?m, the nickel-phosphorus coating (11) having undergone a hardening heat treatment comprising a step of heating to a treatment temperature greater than 250° C. for a treatment duration greater than one hour, so as to have a hardness greater than 700 HV.

Abstract: Vacuum pump having a housing which defines a pump chamber and a drive chamber. A rotor is arranged in the housing, wherein the rotor has at least one rotor element arranged in the pump chamber for conveying a gaseous medium from an inlet to an outlet. Therein, the rotor extends from the pump chamber through a shaft feedthrough into the drive chamber. The shaft feedthrough has a connection, wherein the connection is connected to an underpressure, so that a barrier gas flows from the drive chamber at least partially through the shaft feedthrough to the connection.

Abstract: A balancing mechanism for a positive displacement machine, in particular a scroll compressor, wherein the balancing mechanism includes a drive shaft, a first balancing element and a second balancing element. The first balancing element includes a cylindrical hub section and a first force transmission section and is rotatably in contact with the drive shaft via a first axis of rotation. The second balancing element is rotatably in contact with the drive shaft via a second axis of rotation. A center axis S of the drive shaft and a center axis C of the cylindrical hub section are arranged on a first reference line CS, and a center of gravity J of the first balancing element and a center of gravity K of the second balancing element are arranged on a different side of the first reference line CS than a center axis P of the first axis of rotation.

Abstract: In at least one embodiment, the liquid circulation system comprises a rotor located within a tank, a stator having a plurality of coils outside the tank, and an exterior tank wall that is non-magnetic and that is located next to the rotor and between the rotor and the stator, wherein an axis (R) of rotation of the rotor is in parallel with the exterior tank wall, the coils of the stator are arranged along the axis (R) of rotation of the rotor so that the rotor is configured to be rotated by the stator in a touchless manner through the exterior tank wall by means of a varying electromagnetic field driven by the stator to circulate a liquid within the tank.

Abstract: Systems and methods described herein provide a vacuum priming system for close-coupled pumps. The vacuum priming system is mounted separately from a centrifugal pump and powered by an electric motor. An auxiliary vacuum pump pulls prime (e.g., water or another liquid) through a solenoid valve that is in turn connected to a connecting tube. At one end of the connecting tube is a screen and prime sensor. The screen filters particulates to protect the vacuum pump, and the prime sensor may detect when the centrifugal pump is primed. The vacuum priming system includes a self-contained control panel with an auto operation mode to only pull power during priming, reducing power consumption over the lifetime of the pump system and improving efficiency.

Abstract: Provided is an electric pump having an elastic member that is not easily detached, and the housing formation cost is not high. The electric pump includes a pump body with a housing and an elastic member arranged on an outer circumferential surface of the housing. An elastic member arrangement portion is provided on the outer circumferential surface. A protrusion is provided on the elastic member arrangement portion. The protrusion includes a pillar portion and a fastening portion extending from the pillar portion. The fastening portion has a hook part. The elastic member has holes in two opposite ends, and the holes are engaged with the protrusion. The two opposite ends overlap with each.

Abstract: Systems and methods for preventing rotation of an ESP motor when the motor is not powered on, thereby preventing the motor from acting as a generator when fluid flowing through the pump section of the ESP applies a torque to the motor. In one embodiment, an ESP has a motor section, a pump section. The ESP may include a directional coupling that allows unidirectional rotation between the motor shaft and a pump shaft of the pump section, and a directional lock that allows unidirectional rotation between the motor shaft and a housing of the motor section. The directional coupling and directional lock allow the pump shaft to freewheel in the forward direction without causing the motor shaft to rotate, and prevent the pump shaft and motor from rotating in the reverse direction.

Abstract: A pumping arrangement includes first and second multistage pumps. Each pump includes a housing with a pump unit, the housing includes a pump inlet and a pump outlet, the pump unit includes a plurality of impellers to convey fluid from the pump inlet to the pump outlet, and a pump shaft extending from a drive end to a non-drive end, each impeller mounted to the pump shaft. The second multistage pump includes a first mechanical seal having a process side facing the pump unit. The pump outlet of the first multistage pump connected to the pump inlet of the second multistage pump, so that the first multistage pump and the second multistage pump are arranged in series. The process side of the first mechanical seal of the second multiphase pump is in fluid communication with the pump inlet of the first multistage pump.

Abstract: A compressor is provided including a housing. A first compression stage is defined within the housing and a second compression stage is defined within the housing. The first compression stage has a first compression component and the second compression stage has a second compression component. Both the first compression stage and the second compression stage have a mixed-flow configuration. A motor section is disposed between the first compression stage and the second compression stage relative to a fluid flow through the compressor.

Abstract: Various embodiments are directed to use of RF and WiFi control in a fan device to control fan status and speed and/or fan light on/off status and intensity. A customer premises includes a WiFi router through which WiFi communications can be sent from a WiFi capable device, e.g., a cell phone, to control the fan device and its various functions. While WiFi control is via a WiFi router in the home, the control signals normally do not traverse the Internet or another external network. In addition to WiFi control, control of the fan device can be via an RF control device, e.g., a wall mounted controller. In some embodiments, the fan device reports its state and/or changes in state due to received commands to a server, and the server generates a recommended normal control schedule and an away control schedule and then uses the schedules to control fan device.

Abstract: A set of seals for sealing between two half shells defining at least one pumping chamber and two head plates to be mounted at either end of the two half shells. The set of seals includes: at least one annular seal for sealing between at least one of the head plates and the two half shells; two longitudinal seals for sealing between longitudinal contact faces of the two half shell stators on either side of the at least one pumping chamber, the longitudinal seals being configured to have end portions that abut against the at least one annular seal when mounted in the pump. Each of the seals within the set of seals are made of a material having at least one of: a hardness between 73-83, on the Shore A hardness scale; and a stiffness of between 2.4 and 4.2 N/mm per mm length.

Abstract: A centrifugal slurry pump impeller including a back shroud and a front shroud each with opposed inner and outer faces and an outer peripheral edge and a central axis, a plurality of pumping vanes extending between the inner main faces of the back and front shroud, each pumping vane including opposed main side faces, a leading edge in the region of the central axis and a trailing edge in the region of the outer peripheral edges of the back and front shrouds with a passageway between adjacent pumping vanes, each passageway including a blended region between each of the main side faces of the pumping vanes and the inner faces of the front and back shrouds wherein a surface of the inner face of at least one of the front and back shrouds includes a raised portion located between the blended regions of adjacent pumping vanes.

Abstract: In a vacuum pump in which the rotor blade in one stage has an outer diameter that is smaller at an outlet port side, or the rotor blade in one stage has an inner diameter that is larger at an outlet port side, at least one of an outer circumference portion or an inner circumference portion of the stator blade that is located immediately above the rotor blade having a smaller outer diameter or immediately above the rotor blade having a larger inner diameter has a tapered surface sloping down to an outlet port side. By providing the tapered surface, entering molecules are reflected at a right angle, sent toward an inner circumference side, and hit by the rotor blade in the upper stage. The molecules are thus sent to a next exhaustion stage.

Abstract: Provided is a turbine, including: an accommodating portion configured to accommodate a turbine impeller; an exhaust flow passage configured to allow communication between the accommodating portion and an exhaust-air introduction port; a discharge flow passage configured to allow communication between the accommodating portion and an exhaust-air discharge port; a bypass flow passage configured to allow communication between the exhaust flow passage and the discharge flow passage while detouring the accommodating portion; and a branching portion between the exhaust flow passage and the bypass flow passage. The branching portion has a flow passage sectional area of 0.6 times or more a flow passage sectional area of the exhaust-air introduction port.

Abstract: A centrifugal air-sending device has blades that each have a vane length in a first region that is greater than a vane length in a second region, and are each formed such that a proportion for which a turbo vane portion accounts is higher in a radial direction than a proportion for which a sirocco vane portion accounts in the first region and the second region. The blades that are located closer to an outer circumference than is a blade inner diameter of inner circumferential ends of the blades at end portions of the blades that are close to a side plate in an axial direction are defined as a blade outer circumferential portion that is formed such that a vane thickness of each of the blades in decreased in the radial direction from an inner circumference toward the outer circumference.

Abstract: A fan assembly has a plurality of blades received on a rotatable hub and held on the hub with a retainment mechanism. The hub has a plurality of hub stations located thereon, each hub station having a plurality of radially extending hub cogs and a hub indexing mark. Each blade in the fan assembly has a blade end having a plurality of radially extending blade cogs configured to interface with the hub cogs. The blade end also has a blade positioning mark adjacent one of the blade cogs. The blade may be rotated with respect to the hub to a plurality of different orientations and still have the blade cogs mesh with the hub cogs.

Abstract: A ceiling fan or similar air-moving device can include a motor for rotating one or more blades to drive a volume of air about a space. A connector can be used to connect the blade to a blade iron to mount the blade to the motor. The connector can include a set of receptacles configured to insert into openings on the blade, with the set of receptacles connected by a set of arms. A set of mount posts on the blade iron can seat within the receptacles to mount the blade to the blade iron.

Abstract: A ceiling fan or similar air-moving device can include a motor for rotating one or more blades to drive a volume of air about a space. The blade can include a body with an upper surface, a lower surface, and a side edge. A performance feature can be included in the body between the upper surface and the side edge, or the lower surface and the side edge to improve efficiency. The performance feature can be tailored to the particular blade edge, shape, or intended rotational direction to increase efficiency.

Abstract: A compressor system includes a compressor, and an electric motor driving a shaft to drive the compressor. An inlet is connected to a source of air to be compressed. The inlet is connected to the compressor. A fan impeller is mounted in the inlet upstream of the compressor. A cooling air exit communicates with the inlet, and upstream of the compressor. The cooling air exit is connected to the motor to provide cooling air to the motor. A dual compressor system is also disclosed.

Abstract: A fan frame turbulence structure includes a frame body having a wind incoming side and a wind outgoing side respectively on two sides of the frame body. The frame body defines an airflow passage which passes through the frame body from the wind incoming side to the wind outgoing side. The wind incoming side has an inlet in communication with the airflow passage. The inlet has a breaking section between the wind incoming side and the passage inner wall. The breaking section includes densely distributed breaking units. The breaking units define therebetween gaps in communication with the airflow passage. The breaking units serve to break and fracture airflow sucked in from the wind incoming side, whereby part of the airflow passes through the gaps between the breaking units and is broken and fractured into multiple gap turbulences to flow into the air passage so as to lower the wideband noise.

Abstract: Multistage centrifugal compressor provided with a shaft with blades, which is mounted in a housing with bearings. At least one bearing is provided with a bearing damper element including a ring arranged between the shaft and the bearing. The ring includes slots through the thickness of the ring in the axial direction (X-X?) and at a distance from the radially-directed inner and outer surface of the ring. The slots are at least partially overlapping, and: A) the slots are filled with a liquid, and the axial annular surfaces are closed off by means of a protective cap; or: B) at least one of the annular surfaces is provided with a viscoelastic material or hysteretic damping material sandwiched between two concentric discs, which discs are attached to the ring; or: C) the slots are filled with a viscoelastic material.

Abstract: A guide device for a diffusion vacuum pump having a plurality of annular guide plates. The guide plates being arranged radially, wherein at least one guide plate has a first section starting from a connection point and a second section starting from the connection point. Therein, the first section extends axially in a first direction, the second section extending axially in the opposite second direction. Therein the first section is designed to taper radially and/or the second section is designed to taper radially.

Abstract: A pressure exchanger includes a rotor configured to exchange pressure between a first fluid at a first pressure and a second fluid at a second pressure. The rotor forms ducts that are routed from a first distal end to a second distal end. The pressure exchanger further includes a first end cover that forms a high pressure in (HPIN) port configured to provide the first fluid at the first pressure in a substantially axial direction into the ducts. The first end cover forms a low pressure out (LPOUT) port configured to receive the first fluid from the ducts at a third pressure. The pressure exchanger further includes a second end cover that forms a low pressure in (LPIN) port configured to provide the second fluid at the second pressure into the ducts and forms a high pressure out (HPOUT) port configured to receive the second fluid from the ducts at a fourth pressure.

Abstract: This hydraulic drive system includes: first and second circuit systems; first and second hydraulic pumps; a merge valve that opens and closes a merge passage connecting the hydraulic pumps; an operation device that outputs an operation command corresponding to an amount of operation specifying an amount of actuation of first and second hydraulic actuators; and a control device that controls the merge valve according to the operation command from the operation device. The first circuit system includes: a first meter-in control valve that controls a meter-in flow rate of the working fluid that flows to the first hydraulic actuator; and a first meter-out control valve that controls a meter-out flow rate of the working fluid that is drained from the first hydraulic actuator into a tank. The control device controls an opening degree of the first meter-in control valve and an opening degree of the first meter-out control valve.

Abstract: An actuator for a machine includes a cylinder barrel and a piston arrangement received within the cylinder barrel. The actuator further includes a first cylinder received within the cylinder barrel and a first member coupled to the first cylinder at a first cylinder end of the first cylinder. The actuator also includes a second cylinder received within the first cylinder and a second member coupled to the second cylinder at a second cylinder end of the second cylinder. The actuator includes a third cylinder received within the first cylinder and a third member coupled to the third cylinder at a third cylinder end of the third cylinder. At least one of the first member, the second member, and the third member is threadedly coupled to the first cylinder, the second cylinder, and the third cylinder, respectively.

Abstract: Novel fluidic oscillator (FO) designs that can incorporate features to allow for performance tunability and pulsatile outlet flow. Novel fluidic designs that utilize 3D space are also incorporated. All novel design features mentioned herein can be combined in any fashion with each other.

Abstract: A clip to facilitate a coupling of an object to a suction cup includes a body having a first surface and a second surface disposed opposite to the first surface. The body defines an opening extending from the first surface to the second surface. The clip also includes a tongue adapted to engage with the suction cup and extending inside the opening from the body. The tongue includes a first end attached to the body and a second end arranged at a gap from the body.

Abstract: The present application relates to a fastener for insertion into a first through hole in a rectangular shape on a first plate, and the fastener includes a head, a body, at least two resilient arms, and at least two anti-rotation portions. The body is disposed below the head. At least two resilient arms are provided on opposite first side and second side of the body, respectively, and connect the first side and the second side of the body to the head, respectively. The at least two anti-rotation portions protrude from the first side and the second side of the body, respectively. The at least two anti-rotation portions are configured to be located in the first through hole when the fastener is inserted into the first plate and mounted in place, and each of the at least two anti-rotation portions mates with two adjacent edges of the first through hole to impede rotation of the fastener relative to the first plate.

Abstract: An apparatus is provided for linking two articles of furniture that includes a generally U-shaped link. The two articles of furniture include hollow beams that define a link engagement opening in an inner face opposite an abutting outer face of the beam. The link engagement opening includes a center opening sized to receive part of the link into the interior of the hollow beam and a linking slot in communication with the center opening. The link engagement opening and link are configured so that the link can be moved from the center opening into the linking slot of the hollow beams of both articles of furniture. The link engagement opening further includes a storage slot in which the storage slot and link are configured so that the link can be moved from the linking slot, into the center opening and then into the storage slot to store the link.

Abstract: A hook includes a hook seat, a rivet, and a fixing bolt. A rivet cap and a rivet post are provided on the rivet. The rivet post includes a rivet rod and a rivet seat. A diameter of the rivet seat is greater than a diameter of the rivet rod. A first step is formed between the rivet rod and the rivet seat. A first cut surface and a second cut surface are provided on both sides of the rivet rod, respectively. The rivet and fixing bolt are matched with each other and fixed to the hook seat. The first step abuts against one side of the hook seat. An end face of the fixing bolt abuts against the other side of the hook seat to lock the hook seat between the fixing bolt and the first step.

Abstract: A coupling assembly for coupling a first component to a second component, the coupling assembly includes a pin and a housing. The pin includes a shaft and a pin frangible portion formed in the shaft. The housing includes a hollow body and a housing frangible portion formed in the hollow body. The housing is configured to receive the pin such that the shaft of the pin is received within the hollow body. When the pin is received in the hollow body the pin frangible portion aligns with the housing frangible portion.