Abstract: A fluid end 15 for a multiple reciprocating pump assembly 12 comprises at least three plunger bores 61 or 91 each for receiving a reciprocating plunger 35, each plunger bore having a plunger bore axis 65 or 95. Plunger bores being arranged across the fluid head to define a central plunger bore and lateral plunger bores located on either side of the central plunger bore. Fluid end 15 has suction valve bores 59 or 89, each suction valve bore receiving a suction valve 41 and having a suction valve bore axis 63 or 93. Discharge valve bores 57 or 87, each discharge valve bore receiving a discharge valve 43 and having a discharge valve bore axis 63 or 93. The axes of at least one of suction and discharge valve bores is inwardly offset in the fluid end from its respective plunger bore axis.

Abstract: A pump mechanism for vacuum sealing an airtight cavity formed by a container and a lid, including a bore having a first one-way seal allowing air from the airtight cavity to enter the bore and blocking air inside the bore from returning to the airtight cavity and a second one-way seal allowing air inside the bore to leave the bore without returning to the airtight cavity and blocking air outside of the bore from entering the bore, a piston disposed inside the bore, and a chamber of air enclosed by the bore, the first and second one-way seals, and the piston, wherein actuation of the piston in a first direction causes air to evacuate the airtight cavity and enter the chamber through the first one-way seal, and wherein actuation of the piston in a second direction causes air to exit the chamber through the second one-way seal.

Abstract: An inflating device includes: a main body; an outer cylinder disposed movably within the main body and defining a first air chamber therebetween; an inner cylinder disposed movably within the outer cylinder and defining a second air chamber therebetween; a switching structure including a slide unit disposed slidably to move in leftwise and rightwise directions and upward and downward directions within a recessed chamber of the outer cylinder; and a hand extends slidably and axially through the slide unit in such a manner for optionally engaging the periphery defining a circular hole in the slide unit such that sliding action of the slide unit in the recessed chamber in the leftwise and rightwise direction and axial movement of the handle and the inner cylinder with respect to the outer cylinder serves as large and small pump units.

Abstract: A pump includes a main chamber and a pair of valves on opposite ends of the main chamber. At least a portion of the respective valves and of the main chamber is formed from a single, unitary piece. The respective valves each contain a freely movable member to permit selective opening and closing of each respective valve. A force applicator alternately induces a suction action and an expulsion action in the main chamber.

Abstract: A pump includes a main chamber and a pair of valves on opposite ends of the main chamber. The respective valves each contain a freely movable member to selectively open and close each respective valve, wherein the freely movable member is formed from at least some of the same material used to form a chamber portion of the respective valves. A force applicator is coupled relative to the main chamber to alternately induce a suction action and an expulsion action.

Abstract: Methods and systems are provided to adaptively control a hydraulic fluid supply to supply a driving fluid for applying a driving force on a piston in a gas compressor, the driving force being cyclically reversed between a first direction and a second direction to cause the piston to reciprocate in strokes. During a first stroke of the piston, a speed of the piston, a temperature of the driving fluid, and a load pressure applied to the piston is monitored. Reversal of the driving force after the first stroke is controlled based on the speed, load pressure, and temperature.

Abstract: This disclosure is directed to an apparatus, system and method for introducing a liquid into a vessel. A fluid layering system includes a pump connected to a line connected to a connector, such that the connector provides an air-tight fit with the vessel.

Abstract: A method of operating a pump can include advancing a stepper motor one or more additional steps in a first direction after detecting a first change in a limit sensor state corresponding to a piston reaching an end of its travel in a first direction. After advancing the stepper motor the additional step or steps in the first direction, the stepper motor can be reversed and advanced in a second direction until a second change in the limit sensor state is detected. The stepper motor can then be advanced in the second direction a predetermined number of steps associated with a full travel of the piston.

Abstract: A pump system for liquid media includes at least one pump having a suction side and a delivery side, a control unit connected to the at least one pump, and at least two controllable valves connected on one side thereof to the suction side. The valves are controlled by the control unit connected thereto, such that each valve only allows passage of medium from a first source or second source connectable to their respective other valve sides. The pump system also includes at least one level sensor connected to the control unit, which level sensor is positioned at least near the source where, in the case of a critical level being exceeded, medium must be pumped away.

Abstract: A geared fluid machine has a machine housing and first and second intermeshing gearwheels that are rotatably mounted in the machine housing with respect to an axis of rotation and are arranged at least partially contacting by their end faces. At least one axial washer is arranged in the machine housing with axial play and has on a distal side a pressure field surrounded by a circumferential seal. The seal contacts and seals against a first bearing surface of the axial washer, and also contacts and seals against a second bearing surface of the machine housing. The seal is at least partially U-shaped in section and has a first seal limb contacting the first bearing surface, a second seal limb contacting the second bearing surface, and a connecting limb connecting the first and second seal limbs.

Abstract: The present invention relates to a technology of efficiently cooling a vacuum pump that produces a vacuum in a process chamber of a semiconductor manufacturing facility. The present invention provides a new type of vaccum pump cooling method that keeps the internal temperature of a vacuum pump at a predetermined level by circulating oil through rotors of the vacuum pump, such that it is possible to prevent a rapid increase in the temperature of the vacuum pump and smoothly lubricate bearings at the early stage of operation, whereby it is possible to ensure stability when performing processes and operating the pump and economically maintain the facility.

Abstract: A package type fluid machine includes at least one intake port which is provided in a housing and communicates with an installation region of a plurality of fluid machine units; a plurality of exhaust paths which is provided inside the housing, and includes a first exhaust path which allows gas passed through the fluid machine of the plurality of fluid machine units to flow, and a second exhaust path different from the first exhaust path; and a single exhaust port which is provided in the housing, communicates with downstream end portions of the plurality of exhaust paths, and collects and discharges the gas flowed through the plurality of exhaust paths.

Abstract: The invention concerns a housing of a fan with an external covering, wherein the housing comprises a housing body to accommodate fan components, and a radial exterior face of the housing body is surrounded by the external covering in the circumferential direction over its full surface, so that a radial exterior surface of the housing is formed by an exterior surface of the external covering, and the external covering is detachably fastened to the housing body.

Abstract: A turbine engine with a stator having axially spaced first and second structural elements along with a rotor and a face seal between the rotor and the stator including a non-rotating gas bearing face coupled to the first and second structural elements, and a rotating gas bearing face coupled to the rotor and confronting the non-rotating gas bearing surface. Introducing airflow to one or multiple parts of the seal.

Abstract: The rotatable machine includes a compressor and an inner annular casing circumscribing at least a portion of the compressor. The inner annular casing includes a radially outer surface. The inner annular casing includes a radially outer surface, a vertically upper portion, and a vertically lower portion. The clearance control system includes a manifold system including a manifold system includes at least one conduit extending circumferentially around the vertically lower portion of the inner annular casing. The clearance control system includes a header system including at least one header extending circumferentially around only the vertically lower portion of the inner annular casing. The at least one header configured to receive a flow of cooling fluid from the at least one conduit. The at least one header configured to channel the flow of cooling fluid to the vertically lower portion of the radially outer surface of the inner annular casing.

Abstract: A turbocharger includes a housing, a shaft received therein, a turbine wheel affixed to the shaft at or adjacent to a first end thereof, a compressor wheel affixed to the shaft at or adjacent to a second, opposite end thereof, a first bearing received on the shaft between the turbine wheel and the compressor wheel, and a second bearing received on the shaft between the first bearing and the compressor wheel. One of the first and second bearings is floating relative to the shaft and affixed to the housing, and the other is floating relative to the shaft and also floating relative to the housing.

Abstract: A controller for a rotary machine includes a processor and a memory coupled to the processor. The memory is configured to store operating modes of the controller. The operating modes include a normal operating mode and a fault tolerant operating mode. The controller is configured to receive a signal from at least one sensor and determine an operating state of the rotary machine based on the signal. The controller is also configured to switch the operating modes based on the determined operating state of the rotary machine and regulate at least one electromagnetic bearing and at least one flow control device. The controller is further configured to adjust at least one of the at least one electromagnetic bearing and the at least one flow control device in the fault tolerant operating mode.

Abstract: A pump lubricant supply system has a lubricant reservoir and at least one contactor to engage a lubricant transfer device provided on a rotor shaft of a pump to transfer lubricant from the lubricant reservoir to the lubricant transfer device via the at least one contactor. The lubricant reservoir includes at least a first reservoir portion formed of a first elongate strip of porous material wound to define a first lubricant container body having a longitudinal axis that extends transverse to the longitudinal axis of the elongate strip.

Abstract: A method of repairing or restoring an impeller seal tooth is provided. The method includes the step of inspecting each tooth of the impeller seal to determine what portions of the tooth requires repair. To repair the tooth, the worn portions may be removed via a pre-machining process to a base of the tooth, or other weldable surface of the tooth. The method further includes applying a weld to the weldable surface, via a pulsed laser beam welding process, to build up the weld into a substantially tapered shape corresponding to a shape of a restored seal tooth. After building the weld into the tapered shape, the method includes machining the tapered shaped into the restored seal tooth, and testing the restored seal tooth via a balance and speed testing.

Abstract: A centrifugal compressor includes a rotation shaft that extends along an axis; an impeller that includes a disk fixed to the rotation shaft and protruding outward in a radial direction, a plurality of blades provided in a surface facing one side in an axial direction of the disk to be separated from each other in a circumferential direction, and a cover covering the blades from the one side in the axial direction; and a casing that includes a facing inner peripheral surface facing an outer peripheral surface of the cover in the impeller and covers the impeller from an outside. The facing inner peripheral surface includes a cylindrical inner peripheral surface that extends along the axis and an enlarged inner peripheral surface that is connected to another side of the cylindrical inner peripheral surface in the axial direction and extends outward in the radial direction toward the other side.

Abstract: A blade outer airseal comprising a body having: an inner diameter (ID) surface; an outer diameter (OD) surface; a leading end; a trailing end; a metallic substrate; and a coating system atop the substrate along at least a portion of the inner diameter surface. At least over a first area of the inner diameter surface, the coating system comprises an abradable layer comprising a metallic matrix and a filler. The filler forms at least 20% by volume of the abradable layer with agglomerates or aggregates of oxide particles, the oxide particles having a D50 size ?200 nm.

Abstract: The invention relates to a ventilator wheel which is produced in the form of a radial or a diagonal ventilator wheel, and comprises a bottom disc and a plurality of ventilator blades arranged, on said bottom disc, so as to be distributed about an axial rotational axis, said bottom disc comprising a circumferential radial outer edge section that, when viewed in cross-section, extends in a curved shape in at least some sections and thus forms an elliptical transition of said bottom disc from a radial extension into an axial extension.

Abstract: A fan blade includes a metallic body, a first composite cover, and a second composite cover. The metallic body may have a first side, a second side, a plurality of first retention slots, and a plurality of second retention slots, in accordance with various embodiments. The first and second retention slots may extend from the first side to the second side of the metallic body. The first composite cover may be coupled to the first side of the metallic body and may include a plurality of first fingers that extend through the first retention slots and are coupled to the second side of the metallic body. The second composite cover may be coupled to the second side of the metallic body and may include a plurality of second fingers that extend through the second retention slots and are coupled to the first side of the metallic body.

Abstract: A fan blade (134) includes a working region (148) having a leading edge (138) and a pressure side (136). A plurality of flow modification features (150-1 to 150-4) are positioned at the working region, including first and second flow modification features (150-1, 150-2, 150-3) each having a wedge shape with a pointed end (152) and a wider end (154), and located on the pressure side. A length of the first flow modification feature is less than a chord length of the fan blade, and the pointed end of the first flow modification feature is spaced from the leading edge. A length of the second flow modification feature is less than the chord length of the fan blade, and the pointed end of the second flow modification feature is spaced from the leading edge. The first and second flow modification features are spaced from each other to define a channel (156) therebetween.

Abstract: A blower assembly is attached to a water heater having an exhaust opening, the assembly includes a tank cap attached to a tank of the heater. A recess surface formed in the exterior surface of the cap. A member has a first surface that is connected to the tank cap to form a cover plenum between the cap and the member. The blower includes a motor, an air moving member connected to the motor and a blower housing having an interior containing the fan. The blower housing has an input opening that communicates the blower housing interior with the member output opening. The blower housing, the member and the tank cap provide an exhaust gas flow path from the exhaust opening of the heater through the cover plenum, through the blower housing interior and out the output opening.

Abstract: A diffuser includes a lower element and an upper element. The upper element is fixed on the lower element, and the upper element and the lower element are formed separately. The lower element includes a lower inner wall and a lower outer wall, and the upper element includes an upper inner wall and an upper outer wall. The upper inner wall is connected to the lower inner wall to form an internal air-guiding surface, the upper outer wall is connected to the lower outer wall to form an external air-guiding surface, and the internal air-guiding surface is disposed opposite to the external air-guiding surface to define an air-guiding channel for air flow diffusion. The upper element further includes an upper air-guiding wing for connecting the upper inner wall and the upper outer wall, and the lower element further includes a lower air-guiding wing for connecting the lower inner wall and the lower outer wall.

Abstract: A heat dissipation module is provided, including a frame, a base, and a fan. The frame has a depressed portion at an inner edge thereof. The base is connected to the frame and has a bottom surface. The fan is movably disposed on the base and has a plurality of blades. The end of an upper edge of the blades has a first height with respect to the bottom surface. The depressed portion has a second height with respect to the bottom surface, wherein the first height is less than the second height.

Abstract: A seal runner adapted for use in a knife seal in a gas turbine engine is disclosed. The seal runner illustratively includes an abradable liner.

Abstract: A compressor for use in a gas turbine engine is disclosed herein. The compressor includes a case, vanes, and a vane actuation system. The vanes are arranged circumferentially adjacent to one another about a central axis inside the case and each one of the vanes is configured for rotation about a vane axis generally perpendicular to the central axis. The vane actuation system is configured to cause rotation of at least one of the vanes about the vane axis.

Abstract: A fan section includes a fan inlet case, fan bearing assembly, and an annular heatshield. The fan bearing assembly may be coupled to the fan inlet case and the annular heatshield may be mounted to the fan inlet case. In various embodiments, the annular heatshield is configured to reduce convective heat transfer from heated fluid to the fan bearing assembly.

Abstract: An impeller includes a hub rotated about an up-down axis and inclined blades disposed circumferentially on a hub's outer circumferential surface. The outer circumferential surface includes a first surface including a portion axially overlapping the blade above its joined portion to the blade, a second surface including a portion axially overlapping the blade below the joined portion, and a connecting portion connecting a rotating-direction rear end of the first outer circumferential surface and a rotating-direction front end of the second outer circumferential surface. The connecting portion is arranged forward of a rotating-direction blade front edge. A distance from the axis to a first point, positioned at the rotating-direction rear end of the first outer circumferential surface, is not shorter than that from the axis to a second point, positioned at the rotating-direction front end of the second outer circumferential surface and at the same axial position as the first point.

Abstract: The subject matter of the present invention is a pump arrangement (1, 10, 20, 30, 40, 50), in particular for use in the body's own vessels, having a pump (11, 41, 51) and a sheath (12, 42, 52) receiving the pump, bounding a flow passage (S) and having a distal intake opening (13, 43, 53) and proximal outflow opening (14, 29, 39, 44, 54) for producing a driving flow by means of the pump, wherein the pump is arranged in a first fluid-tight section (12a, 42a, 52a) having the distal intake opening and a second fluid-tight section (12b, 42b, 52b) includes the proximal outflow opening. In accordance with the invention, a further inlet opening (15) is present between the first section and the second section and is arranged between the intake opening and the outflow opening, with the first section and the second section being arranged with respect to one another such that the inlet opening opens into the flow proximal to the pump.

Abstract: The present invention is a new and improved bladder for use with a piston accumulator apparatus, system and method of using same that provides a dispersion tube in the bladder to allow to be communicated under a vacuum from the bladder to the accumulator seawater chamber and back again.

Abstract: A fluid pressure control device includes a switching valve that has a pilot chamber to which the working oil is supplied from the supply passage through the second control valve, and a first relief valve that is provided on the downstream side of the switching valve. The second control valve allows supply of the working oil to the pilot chamber in a case where a flow of the working oil to a tilt cylinder is allowed, and blocks the supply of the working oil to the pilot chamber in a case where the flow of the working oil to the tilt cylinder is blocked. The switching valve allows a flow of the working oil to the first relief valve in a case where the working oil is supplied to the pilot chamber, and blocks the flow of the working oil to the first relief valve in a case where the supply of the working oil to the pilot chamber is blocked.

Abstract: A pneumatic lift retraction assistance apparatus is provided to improve withdrawal of a lift. The pneumatic lift retraction assistance apparatus may include a chassis, chamber, vacuum component, vacuum connections, flow regulation component, control component and power component. A method to operate an apparatus to improve withdrawal of a lift using the pneumatic lift retraction assistance apparatus is also provided.

Abstract: Aspects and techniques of the present disclosure relate to a bleed valve system for bleeding fluid of a first, lower, specific gravity from a fluid of a second, higher, specific gravity, in a fluid system. The techniques can be used to provide a bleed valve system, for a pressurized fluid system, that is not sensitive to rotational orientation around a mounting axis.

Abstract: An actuator main body (11) is formed by a plurality of artificial muscles (12). Each artificial muscle (12) includes an elastic tube (13) and a braided tube (15) covering an outside of the elastic tube (13). A first outside cylindrical body (21) is attached to one end portion of the actuator main body (11), and a second outside cylindrical body (22) is attached to the other end portion of the actuator main body (11). Bonding portions (23, 24) are respectively provided in the first and second outside cylindrical bodies (21, 22). The bonding portions (23, 24) are used to bond the elastic tube (13) to the braided tube (15), to bond the outside cylindrical body (21) to the artificial muscles (12), and to bond the outside cylindrical body (22) to the artificial muscles (12).

Abstract: A soft buckling linear actuator is described, including: a plurality of substantially parallel bucklable, elastic structural components each having its longest dimension along a first axis; and a plurality of secondary structural components each disposed between and bridging two adjacent bucklable, elastic structural components; wherein every two adjacent bucklable, elastic structural components and the secondary structural components in-between define a layer comprising a plurality of cells each capable of being connected with a fluid inflation or deflation source; the secondary structural components from two adjacent layers are not aligned along a second axis perpendicular to the first axis; and the secondary structural components are configured not to buckle, the bucklable, elastic structural components are configured to buckle along the second axis to generate a linear force, upon the inflation or deflation of the cells. Methods of actuation using the same are also described.

Abstract: A communication path that communicates with a first main pressure chamber is provided in a main piston and a piston rod. A check valve, which opens by being pressed by a booster piston and allows the communication path to communicate with a first sub-pressure chamber when the piston rod reaches a booster start position before a forward stroke end, is disposed in an end portion of the communication path. A plurality of steel balls are disposed in a coupling-member containing chamber formed in the booster piston. An engagement surface and an engagement groove, which engage with the steel balls when the booster piston moves forward due to an action of a pressure fluid supplied to the first sub-pressure chamber 11a through the communication path, are formed in the coupling-member containing chamber and an outer peripheral surface of the piston rod.

Abstract: A hydraulic cylinder includes: a cylindrical cushion bearing that is clamped between a piston and a step portion of a piston rod; a cushion passage that is formed between the cushion bearing and a bearing receiving portion and that imparts resistance to the flow of the working oil passing therethrough; and a check seal that is provided between the inner circumference of the cushion bearing and the outer circumference of the piston rod. The check seal shuts off the flow of the working fluid from a connection gap between the piston rod and the piston towards the rod side chamber through the annular gap and allows the flow of the working fluid from the annular gap towards the bottom-side chamber through the connection gap.

Abstract: A plasma plate is used to minimize drag of a fluid flow over an exposed surface. The plasma plate includes a series of plasma actuators positioned on the surface. Each plasma actuator is made of a dielectric separating a first electrode exposed to a fluid flow and a second electrode separated from the fluid flow under the dielectric. A pulsed direct current power supply provides a first voltage to the first electrode and a second voltage to the second electrode. The series of plasma actuators is operably connected to a bus which distribute powers and is positioned to minimize flow disturbances. The plasma actuators are arranged into a series of linear rows such that a velocity component is imparted to the fluid flow.

Abstract: An apparatus for removeably attaching an object to a metal surface is provided. The apparatus comprises a loop portion with a top surface and a bottom surface, a hook portion with a top surface and a bottom surface, a connector, and at least one magnet.

Abstract: A clip holding and release device to hold and secure parts for inspection by holding and releasing a clip feature on a component or assembly. The clip holding and release device may include jaws that have a jaw top portion that may be opened and closed by displacing locking block. A shaft may be displaced directly with a knob, or using a lever, or other method which displaces a locking block to move the jaws in an open and closed position. The jaw top portion may have different configurations depending on the shape or configuration of the part to be inspected. The jaws may also be closed from the front side by displacing the jaws toward each other.

Abstract: A fastening device has a supporting part (9), adhesive fastening elements (25) attached to the supporting part and protruding from the supporting part (9), a shaft part (27) protruding beyond the supporting part (9), and at least one elastically resilient hooking part (19). Each hooking part (19) extends outward away from the shaft part (27) or a holding part (29) for the hooking part (19) in an initial position, forming an intermediate space (30), which is reduced as soon as the hooking part (19) is moved toward the shaft part (27) or the holding part (29) under the influence of an external application of force.

Abstract: A telescopic rod assembly includes a first rod and a second rod. The first rod includes a sliding slot, a first lateral wall formed around the sliding slot, and an engaging recess formed in the first lateral wall. The second rod is slidably mounted in the sliding slot and is movable between a slidable position and a fixed position. The second rod includes a flexible engaging protrusion integrally formed in an outer periphery of one side of the second rod. When the second rod is in the slidable position, the engaging protrusion is abutted against an inner surface of one side of the first lateral wall. When the second rod is in the fixed position, the engaging protrusion is engaged into the engaging recess.

Abstract: A telescopic assembly, particularly suited to a tripod or monopod, having a plurality of telescopically arranged tube assemblies. Each tube assembly has a support tube, a locking assembly, and an actuating tube operatively engaged with, and slidably movable within, the locking assembly. The support tube telescopically receives a further locking assembly and an end of a corresponding further support tube of another of the plurality of support tubes and the actuating tube telescopically receives an end of a corresponding further actuating tube of another of the plurality of actuating tubes. Advantageously, all segments of the telescopic assembly can be unlocked, extended or retracted, and locked with a single actuator.

Abstract: The disclosure relates to a first furniture part adapted to be assembled with a second furniture part. The first furniture part comprises recess and the second furniture part comprises a pin. The recess and the pin has a width which varies along the longitudinal direction (L), thereby forming insertion portions of the recess and core portions of the pin, and respective locking portions. The locking portions are provided with grooves and protrusions. The disclosure further relates to a second furniture part comprising a male part of the joint and to a method of forming a furniture part with a female part of a joint.

Abstract: A joining device includes a male member having a shaft portion, and a tubular female member having a mating portion whereto the shaft portion is inserted and fitted, which are capable of detachably joined with each other. The shaft portion includes, on an outer surface thereof and along an axial line direction, a plurality of protruded portions about an axial line of the shaft portion in a cross section taken along an axial line direction and protruded over an entire perimeter. The mating portion includes, on an inner surface thereof and along an axial line direction, a plurality of recessed portions about an axial line of the mating portion in a cross section taken along an axial line direction and recessed over an entire perimeter. The shaft portion and the mating portion are joined by being engaged at the protruded portions and the recessed portions.

Abstract: A method of applying a corrosion-resistant coating to a fastener that includes preheating an area of the fastener to be coated to elevate a temperature of the area and spraying the preheated area of the fastener with a molten or semi-molten metal. In one embodiment, a corrosion-resistant coating applicator includes a support structure, a rotatable slotted fastener conveyer supported by the support structure, a feeder configured to feed fasteners to the rotatable slotted fastener conveyer, a fastener aligner configured to make head portions of the fasteners aligned with each other, a heater configured to heat head portions of the fasteners as the fasteners are being conveyed by the slotted fastener conveyer, and a sprayer configured to apply a corrosion-resistant coating to the heated head portions of the fasteners being conveyed by the slotted fastener conveyer. The present disclosure also provides corrosion-resistant coated fasteners made using the coating methods and/or coating apparatus.

Abstract: An external thermal heat-stake arrangement includes a polymeric base member having a collared heat-stake having an inner diameter and a second member disposed within the inner diameter of the collared heat-stake. The collared heat-stake is operatively configured to be deformed by a heated element to retain at least a portion of a peripheral edge of the second member to the polymeric base member.