Abstract: The present invention relates to a method for controlled shutdown of wind turbines. The method involves using a generator side converter, and optionally a DC chopper, as a generator load during controlled shutdown. In this way gearbox back-lashing and drive train oscillations can be avoided. The present invention also relates to a wind turbine capable of performing controlled shutdown in accordance with the before-mentioned method.

Abstract: Provided is a blade maintenance device for a wind turbine. The blade maintenance device for the wind turbine includes: a body that travels along a leading edge of a blade; support units that extend from the body to both sides of the blade and support the sides of the blade; and a maintenance unit installed at at least one of the body and the support units so as to perform maintenance of an outer side of the blade.

Abstract: A support structure for mooring a vertically extending floating wind turbine or the like body has a ring of tether attachment points for connecting respective tethers running down to the seabed. The ring is spaced from the body by a ring of inclined struts running diagonally downwardly and inwardly from the plane of the attachment points.

Abstract: Apparatus is provided having one or more SWEGS that may be configured to heat air in a draft power tower arrangement. In a closed loop, cold fluid may be pumped into the SWEGS and heated to a temperature in a range of e.g., 100° C.-300° C., and hot fluid pumped out of the SWEGS. This fluid flows through a heating element (e.g., a radiator or specially designed heat exchanger) that heats the air in the draft power tower arrangement.

Abstract: A hybrid geothermal power system is discussed. The system includes a geothermal system including power plant (101) and pumping station (102) and a nuclear plant (103). Pumping station (102) is used to inject fluid from reservoir (104) through an injection well (105) into the bedrock (106) (also referred to as the hot dry rock HDR zone) and extracted via a secondary bore (extraction well) usually coupled to the power plant (101). In the present example however the injection well is linked to the extraction well (107). As fluid is injected into the bedrock a drop in temperature occurs due to heat transfer to the fluid. Nuclear plant (103) is utilized to combat this drop, the plant (103) has the fissionable components (1091, 1092, 1093) of the reactor positioned within bores (1081, 1082, 1083) within the HDR zone.

Abstract: The invention relates to a solar-powered apparatus, comprising a housing (1), a shield panel (5) disposed on the housing (1), and a transmission apparatus (2) disposed inside the housing (1). The transmission apparatus (2) is provided with eight or more memory alloy sheets (3). The housing (1) is also provided with a ratchet pawl (13). The shield panel (5) is provided with a light-focusing apparatus (51) used for focusing light. The apparatus is capable of converting solar energy into mechanical energy.

Abstract: The present invention includes methods and apparatuses for operating and controlling AOD pumps (10, 10?, 10?, 100, 460, 580, 740) and other pumps.

Abstract: A miniature air pump includes a motor unit, a valve unit and a compression unit. The compression unit is driven by the motor unit to input or output airflows via the valve unit. The compression unit includes an air chamber module and a linkage rod. The air chamber module includes a plurality of compressible chambers and a plurality of resilient connection members, each resilient connection member is located on each compressible chamber. The linkage rod is connected with the motor unit and includes a central rod and multiple sleeves extending from the central rod. Each sleeve has a side cutout. Each resilient connection members engages each sleeve via the side cutout such that the motor unit drives the air chamber module to be compressed or decompressed to input or output airflows via the valve unit. A longitudinal direction of the side cutout is in parallel with the central rod.

Abstract: This invention provides a coil and magnet assembly that is operatively interconnected with an oscillating free piston that moves along an axis. A coil mounting disk is operatively connected to a coil assembly. A magnet assembly is mounted on a magnet base. The magnet assembly is coaxial with respect to the coil assembly. The coil assembly and the magnet assembly are in oscillating motion with respect to each other in conjunction with oscillating motion of the free piston. A spring assembly comprising a plurality springs, symmetrically positioned about the axis, extend between the magnet base and the coil mounting disk, so as to move in conjunction with the oscillating motion along the axis. At least some of the springs are conductive and electrically connect the mounting disk to the magnet base. The piston can reside in a casing that is part of either a two-stroke engine or a fluid pump.

Abstract: The present disclosure relates, according to some embodiments, to fluid pump apparatuses. A fluid pump apparatus may comprise a suction compensator, a housing compensator, and a pump. A suction compensator may comprise an ambient fluid compensator, an ambient fluid bladder, and a spring compensator, wherein the spring compensator comprises a first separator partitioning an internal volume of the spring compensator into a first suction fluid chamber and a compensation fluid chamber. A housing compensator may comprise a second separator partitioning an internal volume of the housing compensator into a second suction fluid chamber and a lubrication fluid chamber. The compensation fluid chamber may be in fluid communication with the suction compensator. The first suction fluid chamber may be in fluid communication with the second suction fluid chamber. A pump may comprise a housing defining a lubrication fluid compartment in fluid communication with the lubrication fluid chamber.

Abstract: A gear pump and gear pump housing are provided. The gear pump housing includes an inner wall and an outer wall. The inner wall defines an inner pumping cavity having a pumping cavity inlet and a pumping cavity outlet. The outer wall surrounds at least part of the inner wall. The outer wall being spaced apart from the outer wall defining a pressure cavity between the inner and outer walls. The pumping cavity outlet is in fluid communication with the pressure cavity. As such, the pressure cavity may be supplied with high pressure fluid that is pumped. The gear pump includes a pair of pumping gears between the pumping cavity inlet and pumping cavity outlet.

Abstract: Provided is an oil pump rotor capable of improving a volume efficiency and a quietness. When a diameter of a base circle bi of an inner rotor is ? bi; a diameter of a first outer rolling circle Di is ? Di; a diameter of a first inner rolling circle di is ? di; a diameter of a base circle bo of an outer rotor is ? bo; a diameter of a second outer rolling circle Do is ? Do; a diameter of a second inner rolling circle do is ? do; and an eccentricity amount between the inner rotor and the outer rotor is e, ? bi=n·(? Di+? di) and ? bo=(n+1)·(? Do+? do) hold; either ? Di+? di=2e or ? Do+? do=2e holds; and ? Do>? Di and ? di>? do hold. When a clearance between the inner rotor and the outer rotor is t, 0.3?((? Do+? do)?(? Di+? di))·(n+1)/t?0.6 holds, provided that ? Di+? di=2e; or 0.3?((? Do+? do)?(? Di+? di))·n/t?0.6 holds, provided that ? Do+? do=2e.

Abstract: A motor-driven compressor includes an electric motor, a compression unit, a lead wire, a connection terminal, a cluster block, a housing, a motor drive circuit, a conductive terminal, and a coupling member. The lead wire is extended from a coil end of the stator. The connection terminal is electrically connected to the lead wire. The cluster block accommodates the connection terminal. The conductive terminal electrically connects the connection terminal and the motor drive circuit. The coupling member is arranged between the stator and the cluster block. The cluster block is coupled to the stator by the coupling member. The coupling member is configured to change an coupling position of the cluster block relative to the stator so that the connection terminal faces the conductive terminal.

Abstract: A scroll compressor and an air conditioner including a scroll compressor are provided. The scroll compressor may include a casing, a fixed scroll, an orbiting scroll, and an injection passage. The fixed scroll may further include a first injection hole and a second injection hole formed on a spiral flow passage, and a third injection hole and a fourth injection hole formed on the spiral flow passage at a position inwardly rotated by about 360 degrees from the first injection hole and the second injection hole along the spiral flow passage. The first injection hole and the third injection hole may be formed on an outer lane of the spiral flow passage, and the second injection hole and the fourth injection hole may be formed on an inner lane of the spiral flow passage.

Abstract: A pump for pumping a multiphase fluid includes a housing and a rotor with an outer surface. A plurality of inducer vanes are attached to the rotor hub, each having a leading edge and a trailing edge where the leading edge of one inducer vane overlaps the trailing edge of an adjacent inducer vane by a first overlap angle. A plurality of impeller vanes are also attached to the hub. The impeller vanes each have a leading edge and a trailing edge where the leading edge of one impeller vane overlaps the trailing edge of an adjacent impeller vane by a second overlap angle larger than the first overlap angle. The pump includes a rotor flow channel extending between the hub outer surface and the housing inner surface. The rotor flow channel has an inlet area and an outlet area, whereby the outlet area is smaller than the inlet area.

Abstract: A fluid working apparatus (100) including a housing structure (130) with an inlet (132) and an outlet (133). A working assembly positioned in the housing (130) has an inlet side and an outlet side with the at least one rotor (114) having a plurality of blades (115) positioned between the inlet and outlet sides. At least one return assembly (140, 142) is configured to return fluid flow from the outlet to the inlet side of the working assembly whereby a working fluid passes through the housing inlet (132), from the inlet side of the working assembly to the outlet side thereof while workingly engaging a first subset of the rotor blades (115), through the at least one return assembly (140, 142), from the inlet side of the working assembly to the outlet side thereof while workingly engaging a second subset of the rotor blades (115), and out of the housing outlet (133). A method of working a fluid is also provided.

Abstract: A system for maintaining a high vacuum in a vacuum enclosure such as cryostat, for example, is described. The system includes a high-vacuum pump having an input that is connected to the cryostat and an output. A vacuum vessel is connected to the output of the high-vacuum pump. A second vacuum pump is connectable to the vacuum vessel. The system is operated such that the high-vacuum pump maintains the cryostat at a high vacuum and the second vacuum pump is periodically operated to maintain the pressure of the vacuum vessel below a threshold pressure. The second vacuum pump may be either permanently connected to, or removable from, the vacuum vessel. The vacuum vessel acts to maintain the output of the high-vacuum pump within a suitable pressure range. This removes the need for the output of the high-vacuum pump to be connected to a continuously operating, second-stage vacuum pump.

Abstract: A centrifugal fan may include an impeller arranged to rotate about a rotation axis, an impeller case arranged to accommodate the impeller, a motor arranged to rotate the impeller, and a motor case arranged to accommodate the motor. The impeller may include a boss portion joined to a shaft arranged to rotate about the rotation axis, a hub arranged to extend radially outward from the boss portion, and a plurality of blades. Each blade may be arranged to extend radially outward. An inner wall of the impeller case may include an inside surface extending radially outward along an upper end portion of each blade. A side end portion of an air inlet defined in a central portion of the impeller case may include a curved surface projecting radially inward.

Abstract: A fan comprises a rotatable hub, a plurality of fan blades coupled with the hub, and a plurality of air fences coupled with the fan blades. Each fan blade has a free end and an opposite end secured to the hub. The air fences are positioned at selected locations along the length of the fan blades, between the ends of the fan blades. Each air fence includes a fin, which may extend upwardly or downwardly from the fan blade. Each air fence may be formed of a resilient material and may be configured to allow the air fence to be snapped onto a fan blade. Each air fence may define an opening through which a fan blade may be inserted. One or more surfaces of the air fence may be contoured to complement a surface contour of an airfoil shaped fan blade.

Abstract: A supersonic compressor rotor and method of compressing a fluid is disclosed. The rotor includes a first and a second rotor disk, a first set and a second set of rotor vanes. The first set and second set of rotor vanes are coupled to and disposed between the first and second rotor disks. Further, the first set of rotor vanes are offset from the second set of rotor vanes. The rotor includes a first set of flow channels defined by the first set of rotor vanes disposed between the first and second rotor disks. Similarly, the rotor includes a second set of flow channels defined by the second set of rotor vanes disposed between the first and second rotor disks. Further, the rotor includes a compression ramp disposed on a rotor vane surface opposite to an adjacent rotor vane surface.

Abstract: A centrifugal blower apparatus includes a scroll-shaped housing with first and second air inlets which open to a blower chamber that is in fluid communication with an air outlet. The blower includes a motor to drive impellers, wherein the motor is secured to a frame coupled within the housing in a manner to substantially enhance aerodynamic performance of the blower.

Abstract: A recirculation fan includes a casing, a covering member, a wind-guiding device, a passive impeller, and an active impeller. The covering member is coupled with the casing to define an accommodation space. The wind-guiding device is disposed on the covering member, and includes a wind-guiding cover and a magnetoresistive structure. The magnetoresistive structure is disposed on the covering member and the wind-guiding cover. The passive impeller is disposed within the accommodation space. The active impeller is disposed within the accommodation space and located beside the passive impeller for generating a wind to drive rotation of the passive impeller and the wind-guiding cover. In response to a magnetic torque resulted from a magnetic vortex of the magnetoresistive structure, a rotating speed of the wind-guiding cover is slowed down.

Abstract: A rotary apparatus comprises a shaft having a rotational axis, a rotation indicator formed on the shaft, a target feature proximate the rotation indicator, and a sensor proximate the target feature. The target feature extends circumferentially about the shaft, with a radial face transverse to the rotational axis and a circumferential face along the rotational axis. The sensor is oriented toward the rotation indicator to sense a rotational speed of the shaft, and oriented toward the target feature to sense transverse vibrations based on a radial distance to the target feature and longitudinal vibrations based on an axial distance to the target feature.

Abstract: A pump device (1A) includes: an impeller (2) that rotates about an axis of rotation (A); an inlet passage (10a) that extends along the axis of rotation (A) of the impeller (2); a volute chamber (10b) provided around the impeller (2); a high-pressure chamber (4) provided around the inlet passage (10a); a circumferential wall (5) that separates the inlet passage (10a) and the high-pressure chamber (4); and a bypass passage (6) that communicates the volute chamber (10b) and the high-pressure chamber (4). The circumferential wall (5) has a plurality of through holes (51) provided in a circumferential direction. The central axis (B) of each of the through holes (51) is included in a plane substantially perpendicular to the axis of rotation (A). The central axis (B) is inclined with respect to a reference line (L).

Abstract: A compressor control method includes providing variable aerodynamic sizing of fluid flow through a compressor at multiple operating points of the compressor. A head is determined for an operating point, based on a process input at that operating point. Further, for that operating point, a control pressure number is determined as a function aerodynamic flow sizing at that operating point. The control pressure number is determined a function of the head divided by the square of a tip speed of the impeller of the compressor. An operating speed setpoint is determined based on the determined head and control pressure number.

Abstract: In one aspect, a method for manufacturing a part for a centrifugal slurry pump is provided, comprising: forming a skeleton of the part having an outer dimension smaller than the part; placing the skeleton of the part in a metal enclosure having an interior dimension larger than the outer dimension of the skeleton of the part and thereby forming a space; adding a metal matrix composite powder into the metal enclosure to fill the space; and subjecting the metal enclosure to hot isostatic pressing, thereby allowing bonding of the metal matrix composite to the skeleton of the part to form the part.

Abstract: An airfoil for a turbine engine includes an airfoil that has pressure and suction sides that extend in a radial direction from a 0% span position at an inner flow path location to a 100% span position at an airfoil tip. The airfoil has a relationship between a leading edge dihedral and a span position. The leading edge dihedral is negative from the 0% span position to the 100% span position. A positive dihedral corresponds to suction side-leaning, and a negative dihedral corresponds to pressure side-leaning. The airfoil has a relationship between a trailing edge dihedral and a span position. The trailing edge dihedral is positive from the 0% span position to the 100% span position. A positive dihedral corresponds to suction side-leaning and a negative dihedral corresponds to pressure side-leaning.

Abstract: A diffuser is disclosed that includes a splitter having a blunt forebody useful in re-starting a boundary layer. The blunt forebody can be used to create a static pressure bow wave and interaction with a passing fluid stream that reduces a thickness of boundary layer formed on an opposing wall. The re-start in boundary layer can be used in a way that allows an upstream portion of the diffuser to be sized approaching a separation limit and a downstream portion of the diffuser to also be sized approaching a separation limit. In some forms the passages split by the blunt forebody can be sized relative to each other to balance flow between the branches.

Abstract: A hydraulic servo-control of a servo-controlled gearbox comprises hydraulic actuators defining chambers, a storing tank containing control fluid used by the actuators at room pressure, a hydraulic accumulator containing control fluid under pressure, a motor pump drawing the fluid from the tank and feeding it under pressure to the accumulator, and solenoid valves selectively connecting the chambers to the tank and accumulator. The accumulator includes an outer housing defining an inner cylindrical surface defining a first diameter, a piston arranged and axially slidable and mobile inside the housing and defining there a first variable-volume chamber for a gas and second variable-volume chamber for the fluid under pressure, and a limit stopper arranged at an open end of the housing, acting as a striker for the piston, and having an annular circlip defining an opening and overall second diameter approximating by excess the first diameter of the surface of the housing.

Abstract: An apparatus has a tank with an open top, a tank wall, and a closed bottom. A first ringwall extends from the bottom such that a first annular space is defined by the first ringwall and the tank wall, and a second annular space is defined by the first ringwall. A second ringwall extends in the second annular space and defines a third annular space between the first ringwall and the second ringwall and further defines a cylindrical space. A conduit extends into the cylindrical space. A pod disposed into the cylindrical space has a closed chamber and a displacement chamber. An inner riser disposed in the third annular space has an open bottom, and an outer riser is disposed in the first annular space and has a closed top, a wall, and an open bottom.

Abstract: The invention relates to a flap actuator, in particular to a servo/spoiler actuator, comprising at least one electrohydraulic servo valve and at least one actuator which are hydraulically connected to one another, wherein the actuator comprises at least one actuator housing in and/or at which the at least one channel is arranged by means of which one or more components, preferably likewise arranged in and/or at the actuator housing, are hydraulically connected and wherein no valve block is arranged between the actuator and the servo valve.

Abstract: A method of combining outputs of a plurality of fluid pumps includes receiving an input signal from an input device. The input signal is adapted to control a function of a work vehicle. An actuation signal is sent to a first direction control device of a first actuator assembly. The first actuator assembly is in selective fluid communication with a first pump assembly. A position of a second direction control valve of a second actuator assembly is received. The second actuator assembly is in selective fluid communication with a second pump assembly. A selector valve that is in fluid communication with a cavity of a poppet valve assembly is actuated so that the second pump assembly is in fluid communication with the first actuator assembly when the second direction control valve is in a neutral position.

Abstract: To provide an oscillating actuator which is capable of easily changing an oscillation start position of a shaft. An oscillating actuator includes an actuator main body 2 having a shaft 4 which is configured to oscillate about an axis L in a predetermined range of angle by means of a compressed air, and a fixing plate 3 for fixing the actuator main body 2 to a load device 30, wherein the actuator main body 2 and the fixing plate 3 are connected together by a connection mechanism 5 so as to be displaceable relative to each other in the rotation direction of the shaft 4 so that an oscillation start position A of the shaft 4 is changed by displacement of the actuator main body 2 and the fixing plate 3 relative to each other.

Abstract: A brake valve is insertable into a working line of a hydrostatic travel drive. The brake valve has a main stage with a first port connected to a variable displacement pump of the drive system and a second port connected to a motor of the drive system. The main stage has a slide piston positionable in a valve bore. In a freewheeling position, a connection is maximally open with minimal throttling between the two ports. In pressure-reducing positions, a regulable, throttled connection is open from the second to the first port to brake the motor. In pressure-limiting positions, a regulable, throttled connection is open from the first to the second port to begin to throttle a pressure medium flow from the variable displacement pump to a pressure protection mechanism. The positions lie on a center line of the main stage along which the slide piston is movable.

Abstract: A fluid management system includes a hydraulic main pump fluidly connected to a load, an accumulator fluidly connected to the hydraulic main pump, a secondary pump, a fluid preparation system fluidly connected between an outlet of the secondary pump and an inlet of the hydraulic main pump, a reservoir, and a valve system fluidly connecting the reservoir, an outlet of the hydraulic main pump, and the secondary pump inlet. The system is at least operable between a run mode, wherein the secondary pump and accumulator cooperatively maintain the pressure within the hydraulic main pump, and a charging mode, wherein the secondary pump pumps fluid into the accumulator until a threshold volume is reached.

Abstract: A hydraulic servo-control of a servo-controlled gearbox provided with a hydraulic accumulator, having an outer housing and a piston that is slidable axially inside the outer housing and adapted to define a first variable-volume chamber for a gaseous material and a second variable-volume chamber for a control fluid under pressure; and at least one limit stop arranged at an open end of the outer housing which serve as a lower limit stop element; wherein the outer housing is provided with an upper limit stop element, which acts to limit the pressure value inside the first variable-volume chamber within a predetermined safety range.

Abstract: A cushion mechanism for decelerating a piston rod includes a holder fastened to an end surface of a cylinder portion fitted with an inner peripheral surface of a cylinder tube, an annular entry portion provided on the piston rod and advancing into the holder and the cylinder portion in the vicinity of the stroke end, a cushion passage leading a working fluid of the working chamber to a supply/discharge port, and an orifice plug fastened to the cushion passage, and the cushion passage includes an internal passage extending in a radial direction of the holder and to which the orifice plug is fastened, and the orifice plug is replaceable through a replacement port formed by penetrating the cylinder tube and communicating with the internal passage.

Abstract: A method is provided for the operation of an assembly of a vehicle, whereas the assembly is transferable from an unactuated position into an actuated position by a pressure medium-actuated actuator if two redundant pressure medium valves both occupy a pressure supply position. For the functional test of one of the valves, a first valve is controlled to occupy the pressure supply position, and the second valve is controlled so as not to occupy the pressure supply position. If, upon this control of the two valves at the pressure medium-actuated actuator or at the assembly to be operated by the pressure medium-actuated actuator, no reaction is detected, there is a correct operation at a proper second valve. If, despite this control of the two valves, at the pressure medium-actuated actuator or at the assembly to be operated by the pressure medium-actuated actuator, a reaction is detected, there is an improper operation at a defective second pressure medium valve.

Abstract: An electrostatic bypass system and method as disclosed utilizes corona wires extending laterally across the flow path upstream of the section of the flow path of concern. The corona wires can be arranged to form a mesh across the flow path and can be powered by a power source to ionize the air surrounding the wires to thereby apply an electrostatic charge to the particulates as they pass through an ionized section of air proximate the wires.

Abstract: A system for preloading a fastener of a mechanical fitting includes a strain measuring device to measure a strain on the fastener as the fastener is tightened. The mechanical fitting may include a base structure and a plate member. A support structure supports the plate member at a predetermined spacing from the base structure. The support structure may include a first sloping plate and a second sloping plate each extending between the plate member and the base structure. The fastener extends through a first hole in the plate member and a second hole in the base structure. The fastener is accessible through an opening on each side of the support structure. At least a portion of the strain measuring device is positioned relative to the fastener through a first opening of the openings to measure the strain on the fastener correlating to the preload as the fastener is tightened.

Abstract: A photovoltaic (PV) module framing and coupling system enables the attachment of PV modules to a roof or other mounting surface without requiring the use of separate structural support members which attach directly to and span between multiple PV modules in a formed PV array. The apparatus provides a parallel coupling for securely interlocking the outside surfaces of parallel frame members together in a side to side arrangement to form an array with improved structural load distribution. The coupling may attach to a slot in the frame at substantially any position along the length of the frame thereby enabling the interconnection of adjacent PV modules along both an x and y axis. The apparatus may further provide a rotating portion and locking portion, mounting brackets for direct connection to a mounting surface, grounding teeth, and a twist-lock engagement means for interlocking and aligning PV modules in the array.

Abstract: A trapeze hanger fitting includes a strut connecting portion configured for insertion into an open interior of a strut through an open longitudinal end of the strut to connect the trapeze hanger fitting to the strut. A rod securement portion is connected to the strut connecting portion and configured for securement to a rod to secure the trapeze hanger fitting to the rod. The rod securement portion is configured to be disposed outside the open interior of the strut and longitudinally outward from the open longitudinal end of the strut when the strut connecting portion is inserted into the open interior of the strut.

Abstract: A telescoping mast having a latch assembly includes a latch body mountable to a first tube section, a latch mechanism supported by the latch body, a toggle mechanism operatively connected to the latch mechanism, and a latch plate mountable to a second tube section. The latch mechanism includes a pawl member pivotably between an engaged position for interlocking with a corresponding recess in the latch plate to thereby restrict axial movement between the first and second tube sections, and a disengaged position allowing relative axial movement between the first and second tube sections. The toggle mechanism is movable between an over-center locked configuration corresponding to the engaged position of the latch mechanism and an unlocked configuration corresponding to the disengaged position of the latch member.

Abstract: Disclosed is an adjustable vertical pipe support, in which a second saw-toothed portion is positioned in a wedge of a length adjusting member for adjusting a length of upper and lower pipes, so as to prevent unlocking or slip of the upper pipe and thus improve the safety of the vertical pipe support, even though a first rotation adjustor is rotated by a tensile force or an external force. The adjustable vertical pipe support includes a wedge with a first and second saw-toothed portion on the inner peripheral surface, in which any one of the first saw-toothed portion and the second saw-toothed portion is inclined upwardly so as to suppress downward movement of the upper pipe, and the other is inclined downwardly or is formed in the shape of a ridge so as to suppress upward movement of the upper pipe.

Abstract: A composite sandwich shell edge joint includes an outboard buildup pad, an inboard buildup pad spaced-apart and adjacent to the outboard buildup pad, an outboard face sheet extending from the outboard buildup pad, an inboard face sheet extending from the inboard buildup pad, bridging plies connecting the outboard buildup pad and the inboard buildup pad and at least one barrel nut installed in the buildup pads.

Abstract: A two-way fastener includes a first member threaded for being screwed into a first workpiece; a polygonal wall for receiving a tool to screw the first member into the first workpiece, the polygonal wall located at a base end of the first member; and a second member extending in an opposite fastening direction from the first member, the second member configured to be fastened to a second workpiece. A fastening method includes enabling the threading of a first member of a fastener into a first workpiece; and enabling the threading of a second workpiece to a second member extending outwardly from the first member and the first workpiece.

Abstract: A pin for a blind bolt, the pin having a proximal end, a distal end and a shaft between the proximal and distal ends, extending axially from the distal end an outwardly tapered surface and an inwardly tapered surface, the pin comprising a strike portion at the proximal end, wherein the cross sectional area of the strike portion is greater than the cross sectional area of the shaft.

Abstract: A blind rivet arrangement (1) is described, comprising multiple rivet bodies (3, 3a, 3b) arranged in succession on a mandrel (2), the mandrel (2) having a mandrel head (8) with an outside diameter which is greater than an inside diameter of the rivet bodies (3, 3a, 3b). The aim is to provide an inexpensive way to produce a blind rivet arrangement that works effectively. To this end the mandrel (2) and the mandrel head (8) are designed as parts that are produced separately and joined together.

Abstract: A self-locking device with continuous locking positions includes a housing with an internal cavity, a wall of the cavity including a first frictional contact face and a fourth frictional contact face; a locking member with a second frictional contact face and a third frictional contact face, which is movable in the cavity, with the second and third frictional contact faces facing the first and fourth frictional contact faces, respectively; and a first lock block and a second lock block, with the first lock block being arranged between and contacting with the first and second frictional contact faces, and the second lock block being arranged between and contacting with the third and fourth frictional contact faces. The first and second lock blocks allow the locking member to be movable with respect to the housing in a first direction but locked in a second direction opposite to the first direction.

Abstract: A fastening device is disclosed. The fastening device has a vertical protrusion for fastening. A horizontal portion and an indicator are used for seating. The horizontal portion extends from the vertical protrusion for providing a clue to indicate that the fastening device is seated correctly. In embodiments, the clue is a color or a texture. In embodiments, a bellow is used with elastomeric properties. When the right load and torque are applied, the bellow covers the horizontal portion such that the color and/or texture of a perspective directed at the horizontal portion appear to be changed.