Abstract: An intake device includes: a rotary shaft; and a resin-made intake valve including a rotary shaft press-fit guide hole provided at an end portion in a rotary axis direction to guide the rotary shaft when the rotary shaft is press-fitted, a rotary shaft press-fit hole provided on a more inner side than the rotary shaft press-fit guide hole in the rotary axis direction, the rotary shaft inserted through the rotary shaft press-fit guide hole being press-fitted into the rotary shaft press-fit hole, and a window portion exposing an outer surface of the rotary shaft, the resin intake valve being rotated together with rotation of the rotary shaft in the intake port to change intake air, in which the rotary shaft press-fit guide hole has a tapered shape portion which gradually decreases in cross-sectional area toward the rotary shaft press-fit hole when viewed from the rotary axis direction.

Abstract: A vessel includes a vessel body, an engine contained in the vessel body, an air intake box including an air intake port and that is attached to the engine, an air intake duct drawn around in the vessel body, and a guide duct including an opening that opposes the air intake port. The air intake box supplies air taken in from the air intake port to the engine. The air intake duct includes an outer end connected to a deck of the vessel body. The guide duct guides air taken in from outside the vessel body by the air intake duct to the opening.

Abstract: The disclosed inventive concept provides an intake manifold for an internal combustion engine that demonstrates reduced NVH. The disclosed inventive concept provides an intake manifold having intersecting ribs that extend along both the plenum and the intake runners. Impressions or recessed areas are selectively disposed at critical locations between certain ones of the intersecting ribs. Flat areas are formed between each impression and the adjacent ribs. The shapes of the impressions may be polygonal, round or oval or mixture thereof. The thickness of the intake manifold wall may be constant or variable. The location, shape and depth of each of the impressions are selected to thereby optimize both NVH and flow performances. These impressions provide additional localized stiffness that improves high frequency noise without increasing wall thickness, weight, design complexity, or overall cost of tooling, material or manufacture.

Abstract: Methods and systems are provided for a throttle plate and a vacuum consumption device. In one example, a method may include providing vacuum to a vacuum consumption device with a venturi passage inside a throttle.

Abstract: A hydraulic connection via which a fuel injector is connectable to a fuel-conducting component and which includes a retaining bridge having a support surface. A connecting piece of a fuel injector is supportable on the support surface of the retaining bridge. A hydraulic connection being formed between the connecting piece of the fuel injector and a connection. A convexly curved bearing surface is provided on the connection, and a support surface is formed on the connecting piece of the fuel injector. A contact between the connecting piece of the fuel injector and the connection is implemented on the convexly curved bearing surface and the support surface for forming the hydraulic connection. The support surface is designed axially symmetrically with respect to a longitudinal axis. The support surface is designed in a widened manner in a direction from the connecting piece toward the connection along the longitudinal axis.

Abstract: A gas turbine fuel injector assembly including one or more dampers for damping vibration of one or more fuel conduits in the assembly. The dampers may at least partially surround the fuel conduits, and each damper has an intermediate portion that is bowed relative to axial end portions to form a pocket, which enables the damper to be free to flex radially for damping vibration experienced by the fuel conduit during operation. The damper may be a wire mesh damper formed with interwoven wires that are configured to move relative to each other in response to vibrational movement of the fuel conduit. The wire mesh damper also may enable fluids, such as gases or fuel, to flow through gaps in the wire mesh. The damper may support and damp individual fuel conduits, thereby enabling the fuel conduits to thermally expand independently of each other in the assembly.

Abstract: Methods and systems are provided for injecting fuel through three different rows of injector nozzles, where each row of the injector nozzle is arranged along a different vertical plane of the injector body. In one example, an injector needle housed movably inside the injector body may supply high-pressure fuel to each of the rows of injector nozzles sequentially to deliver up to five fuel injections in one actuation cycle of the fuel injector. In another example, a fuel injector may include three injector needles, where movement of each injector needle inside a respective chamber of the fuel injector body may supply high-pressure fuel to the chamber from where the fuel may be injected through the coupled fuel injector nozzles.

Abstract: An engine starting system is equipped with a starter and an alternator which work as engine starters to complete start-up of an engine mounted in a vehicle. The engine starting system obtains at least one of a first parameter correlating with an operating condition of the starter and a second parameter correlating with an operating condition of the alternator. The engine starting system controls an interval between a stop time of the starter and a start time of the alternator as a function of at least one of the first and second parameters, thereby ensuring the stability in completing the start-up of the engine.

Abstract: When a start condition is satisfied after the internal combustion engine has been stopped according to an automatic stop control, a control apparatus reversely rotates the engine to compress an air in an expansion stroke cylinder at that time point, and thereafter generates a first time combustion. The apparatus determines whether the start condition becomes satisfied based on a first start request owing to a driving operation by a driver of a vehicle on which the engine is mounted. When the start condition becomes satisfied based on the first start request, the control apparatus makes a maximum value of an engine generating torque by the first time combustion and/or a maximum torque of the engine generating torque by a second time combustion larger as compared to when the start condition becomes satisfied based on a second start request other than the first start request.

Abstract: The present disclosure relates to controlling engine of a vehicle. According to an aspect of the present disclosure, when it is determined that the vehicle has entered a deep water area, an engine start-stop function of the vehicle is disabled. The deep water area has a water depth which allows water to enter the engine of the vehicle or causes the engine of the vehicle to be susceptible to water inflow.

Abstract: In the cases where a reverse operation of a crankshaft is performed after fuel injection and ignition in a cylinder in a power stroke and it is determined that an engine start is failed, a starter motor is operated, and fuel injection and ignition are executed in the cylinder in the compression stroke to start an engine.

Abstract: An engine starting system is provided which is used with a vehicle equipped with a gear driving starter which is energized to bring a pinion gear into engagement with a ring gear of an engine mounted in the vehicle and also to rotate the pinion gear to crank the engine. The engine starting system works to terminate energization of the starter after the starter is energized to start the engine. The engine starting system executes combustion control to control combustion of fuel in the engine so as to develop a first firing event where the fuel is first fired in the engine after the energization of the starter is terminated. This minimizes the gear noise when the engine is being cranked and ensures the stability in starting the engine.

Abstract: Methods and systems are provided for starting a vehicle engine. In one example, an engine starter system for starting the vehicle engine may comprise a ring gear coupled to an engine crankshaft, and a pinion gear coupled to a starter motor, the pinion gear having rotatable rocker elements for engaging the ring gear. In this way, the pinion gear may be engaged with the ring gear to transmit torque from the starter motor to the engine crankshaft to quickly start the engine.

Abstract: There is described a method for and system for starting at least one engine from a twin engine installation.

Abstract: A method diagnoses a no-start condition in a powertrain having an engine and a starter system operable for starting the engine. The starter system includes a battery, solenoid relay, starter solenoid, and starter motor. The method includes recording starter data over a calibrated sampling duration in response to a requested start event when the solenoid relay is enabled, including a cranking voltage and engine speed. If no battery current sensor is used, the method derives a resistance ratio using an open-circuit voltage and a minimum cranking voltage of the battery. When such a sensor is used, the method derives a battery and starter resistance. A fault mode of the starter system is then identified via a controller using the starter data and either the resistance ratio or the battery and starter resistances. A control action executes that corresponds to the identified fault mode.

Abstract: In a general aspect, an ignition circuit can include a control circuit that is coupled with an engine control unit (ECU) to receive a command signal from the ECU. The control circuit can include a multi-pulse generator configured to, in response to the command signal, generate a multi-pulse drive signal. The multi-pulse drive signal can include a first pulse cycle having a first duty cycle, a second pulse cycle having a second duty cycle, and a dwell period during which the multi-pulse drive signal continuously remains at a logic high value. The control circuit can be configured to provide the multi-pulse drive signal to an ignition switch coupled with the control circuit to receive the multi-pulse drive signal.

Abstract: A system according to the present disclosure includes a first crank angle module, a second crank angle module, and a spark control module. The first crank angle module determines a first crank angle of an engine at which a predetermined percentage of fuel in a first cylinder of the engine is combusted based on pressure in the first cylinder. The second crank angle module determines a relationship between the first crank angle and a second crank angle of the engine at which the predetermined percentage of fuel in a second cylinder of the engine is combusted based on pressure in the first cylinder and pressure in the second cylinder. The spark control module adjusts spark timing of the first cylinder based on the first crank angle, and adjusts spark timing of the second cylinder based on the relationship between the first and second crank angles.

Abstract: A system for detecting spark plug failures in an engine is provided. The system may include one or more sensor devices coupled to the engine and configured to measure engine data, a controller in communication with the sensor devices, and an output device. The controller may be configured to determine at least a misfire count, a secondary transformer voltage, and an exhaust port temperature based on the engine data, identify a fault condition based on one or more of the misfire count, the secondary transformer voltage, and the exhaust port temperature, and perform a corrective action responsive to the fault condition. The output device may be configured to generate a notification corresponding to the fault condition.

Abstract: A fluid driven turbine apparatus includes a hollow body and rib plates annularly disposed in the hollow body. A vane module is disposed in the hollow body and co-axially connected to a shaft extending axially through the hollow body. The rib plates surround the vane module and are spaced apart from the vane module by an annular gap. The annular gap has a width gradually enlarged in a top-to-bottom direction. When fluid flows into the vane module and is diverted sideward to the annular gap, large sand grains carried by fluid may pass through an enlarged lower portion of the annular gap without getting stuck therein and abrading the rib plates and the vane module.

Abstract: An underwater system for generating electricity can include a spool assembly configured to wind and unwind a retractable line. The system can include a controllable apparatus connected to the retractable line. The system can include a tension assembly connected to the spool assembly and configured to maintain a first tension in the retractable line. The system can include one or more surfaces connected to the apparatus and configured to produce a second tension in response to a current, the direction of the second tension being either opposite or equal to the direction of the first tension. The system can include an electrical generator assembly configured to generate electricity in response to unwinding the retractable line.

Abstract: A wave power generation apparatus includes: a rack device having plural columns, and the bottom of the column being fixed to a nearshore seabed; at least one linking device installed on the rack device and having at least one frame; a sliding assembly installed to the frame and having a longitudinally installed first sliding element and a longitudinally installed second sliding element; a first buoy connected to the bottom of the frame; a gear set including a first gear and a second gear; a rotating shaft pass and installed to the gear set and linked by the gear set for a one-way rotation; a power conversion device transmissively connected to the rotating shaft; and a power generation device transmissively connected to the power conversion device to generate electric power.

Abstract: A wave energy converter utilizes a flotation module that rises and falls with the passage of waves, a submerged tube containing a constriction which multiplies the speed of the water passing therethrough, a turbine (or other hydrokinetic apparatus) positioned so as to extract energy from the accelerated flow of water within and/or through the tube, and a submerged gas- or liquid-filled chamber housing one or more energy conversion components (e.g. generators, transformers, rectifiers, inverters). By providing a chamber in proximity to the turbine, generators can be placed in closer proximity to the turbine that turns them, and the shared shaft can be shorter than if the generators were placed in the buoy adjacent to the surface.

Abstract: An axial piston machine may include a shaft and a housing surrounding at least a portion of the shaft. A cylinder arrangement may be disposed within the housing in a circular manner. The cylinder arrangement may include a plurality of cylinders and a plurality of pistons each extending within each of the plurality of cylinders and may be constructed and arranged to drive the shaft. The plurality of cylinders may each include an expansion volume with an inlet and at least one outlet opening for a working medium. A cylinder head may be provided on the housing and may be constructed and arranged to close the plurality of cylinders of the cylinder arrangement. A cavity may be defined around the shaft in a central region of the cylinder arrangement and may be in operative communication with a plurality of auxiliary outlet openings of the expansion volume of each of the plurality of cylinders via a temporary connection.

Abstract: The present disclosure is directed to a rotor blade component for a wind turbine. The rotor blade component includes a plurality of pre-cured members arranged in one or more layers. Each of the pre-cured members is constructed of a plurality of fiber materials cured together via a resin material having a first stiffness and at least additional material having a second stiffness. Further, the second stiffness is lower than the first stiffness. As such, the additional low-stiffness material is cured within the resin material so as to increase flexibility of the pre-cured members.

Abstract: A wind turbine with reduced electromagnetic scattering includes a wind turbine support structure having a cylindrical shape, a wind turbine blade supported by the wind support structure, and a plurality of multi-layer absorbers to limit the electromagnetic scattering, the absorber including at least cobalt ferrite alloy nano-particles, cobalt ferrite alloy nano-flakes, and air. The wind turbine blade includes a blade root, a blade tip opposite the blade root, and a blade middle part extending between the blade root and the blade tip. The plurality of multi-layer absorbers further includes a planar absorber that covers the wind turbine support structure, and a curved absorber that covers the middle part.

Abstract: Provided is a method of controlling a rotational speed of a rotor of a wind turbine having a rotor with blades connected thereon, at least one blade including a blade profile changing equipment, the method including: changing the blade profile dependent on a rotational speed deviation of an actual rotational speed of the rotor or the generator rotor from a reference rotational speed.

Abstract: The present disclosure is directed to a system and method for estimating an overall wind coherence acting on a wind turbine and using same to dynamically adapt the gain or bandwidth of pitch or torque or yaw control logic within a wind turbine. The method includes generating, via sensors, a plurality of sensor signals reflective of wind conditions near the wind turbine. The method also includes filtering, via at least one filter, the sensor signals at a predetermined frequency range considered damaging for turbine sub-system loading. Thus, the method also includes estimating an overall damaging wind coherence acting on the wind turbine as a function of distance-normalized wind coherences, which themselves are derived from auto and cross-covariances of pairs of filtered signals. The distance normalization uses a model of natural coherence dissipation with distance.

Abstract: The purpose is to provide a wind farm that is capable of increasing power generation output or a control method of a wind farm.

Abstract: A floating body type offshore wind power generation is provided. An elongated floating body is provided with a sail and a rudder, and a wind-power generator and a battery are provided on the floating body. These are provided with a GPS and a communication facility, and are capable of determining and moving to places having good wind conditions. The floating body can travel in both directions in a longitudinal direction and can travel also to the windward, and is capable of staying at substantially the same position by repeating the movement in a switchback manner, so that the same function as a moored floating body type wind power generation is also achieved. Generated power is accumulated in the battery or the like and the power is extracted on a site of use such as the land for use.

Abstract: A wind sensor support assembly for a wind turbine is provided. The assembly includes a holding member for holding a wind sensor, and a support structure for supporting the holding member, the support structure being adapted to be fastened to an upper part of a wind turbine, wherein the support structure is adapted to allow adjustment of the position of the holding member relative to the upper part of the wind turbine. Furthermore, a wind turbine, a wind farm and a method of supporting a wind sensor on a wind turbine are described.

Abstract: The present invention relates to a soft actuator moving linearly against external stimuli whose expansion and contraction can be actively controlled, suggesting that the actuator of the invention overcomes the problems of the conventional soft actuators, The soft actuator of the present invention can be repetitively driven quickly and accurately by controlling heating and cooling by using thermoelectric effect and, the soft actuator of the present invention can realize bending, tensioning, compression, and rotational driving of a tubular device containing a driver.

Abstract: A fluid end block for attachment to a power end of a high pressure reciprocating pump includes a main body portion having an outwardly facing body forward face, an outwardly facing body rear face opposite the body forward face, and opposing side surfaces. A web portion protrudes outwardly from the outwardly facing body forward face. The web portion may have an outwardly facing web forward face and a curvilinear side surface. The web portion may be integral with the main body portion. A plurality of bosses protrude from the web forward face and having a forward facing end. The plurality of bosses may be integral with the main body portion and the web portion. A plunger bore extends through one of the plurality of bosses configured to receive a reciprocating plunger.

Abstract: A plunger pump fluid end housing assembly comprising: a fluid end housing, multiple plungers, a single in-line suction valve and seat corresponding with each said plunger, a discharge valve and seat corresponding with each said plunger; wherein axis of said suction valve and seat are parallel with said plunger, and the suction manifold is positioned to teed the fluid chamber opposite the power end of the fluid end. Plunger chamber of said fluid end housing is square or rectangular in cross section with large fillets at corners and flats between said fillets. Said flats are approximately equal in width to radii of said fillets.

Abstract: A hydrostatic axial piston machine includes a pot-like housing, a connection plate that closes the pot-like housing, a rotatably mounted cylinder drum, and pistons arranged in cylinder chambers of the cylinder drum. The cylinder chambers are each alternately connected via a cylinder chamber opening to a low-pressure control opening and a high-pressure control opening of a resting control part. The control part has two switching regions located between the low-pressure and high pressure control openings. A piston reverses its movement direction in a dead center within the two switching regions. In the switching region, the cylinder chambers are connected via a connecting line to a fluid volume arranged in the housing. The fluid volume extends between the connection plate and the housing such that it is sealed to an interior by the connection plate and the housing.

Abstract: A hydrostatic axial piston machine includes a housing, a cylinder barrel, and a drive shaft, which are connected together and mounted in the housing so as to rotate jointly about a first axis. The machine also includes a swash plate mounted in the housing so as to pivot about a second axis to adjust a swept volume of the machine. The machine further includes a hydraulic actuating apparatus, which has an actuating piston that delimits an actuating chamber. The machine also includes a regulating valve attached to a flange face of the housing. The regulating valve has connections situated in the flange face that are used to communicate hydraulic fluid to and from the actuating chamber. The flange face is arranged obliquely so as to enclose an angle with the second axis that is greater than 0° and smaller than 90°.

Abstract: Disclosed is an air compressor in which a driving shaft and a crankshaft tube that surrounds the driving shaft are axially coupled, a clutch is installed between the driving shaft and a rear end of the crankshaft tube, and an air cylinder including a steam cylinder, a piston spaced apart at a certain distance from the steam cylinder, and an interval former installed between the steam cylinder and the piston is installed in a crankcase that forms a pump chamber, to prevent frictional ring plates that rub steel ring plates of the clutch together from being worn by a determined thickness or more by the interval former and simultaneously to cut off supplying of compressed air to the inlet of the air cylinder by the interval former in such a way that a connection state between the driving shaft and the crankshaft tube is continuously maintained.

Abstract: The device consists of two separate parts: a stationary unit (12) which contains a motor (16) and vacuum pump (14), and a mobile head (20) with a power-supply switch for the motor and an aspirating nozzle designed to fit over the valve (32) in the lid of an airtight container (28, 30). The mobile head connects to the stationary unit with two flexible coaxial spiral cords, consisting of a hose (22) linking the vacuum pump and aspirating nozzle, and a power cord (36) linking the switch to the electrical motor. Both lines can easily be stretched together from the storage position, in which the mobile head sits on the stationary unit, to active mode, in which the suction effect keeps the mobile head coupled to the container.

Abstract: A diaphragm (18) includes a disk-shaped center planar portion (40) and a first lip (42) and a second lip (44) on the outermost edge of the disk shaped portion (40) and extending transversely to the planar disk portion (40). The first lip (42) is on a first side of the diaphragm (18) and the second lip (44) is on an opposite side of the diaphragm (18). A mounting portion (38) extends outward from the center of the face of the planar portion (40) on the first side of the diaphragm (18). For metering pump applications pumping harsh fluids, the diaphragm (18) is typically made from a fluoropolymer and in particular may be made from polytetrafluoroethylene (PTFE).

Abstract: The present invention relates to pumps, particularly a compact, linear, positive displacement pump that can be used in several applications including medical and non-medical devices. In particular, the invention is related to linear, positive displacement compression blood pumps (either intracorporeal or extracorporeal) that provide systemic circulatory stability by maintaining a steady average blood pressure. In some embodiments, the invention relates to perfusion pumps, infusion pumps, pumps used for ECMO (extracorporeal membrane oxygenators) and bioreactor pumps.

Abstract: Systems, apparatuses, and methods of and for an ophthalmic surgical system are disclosed. An ophthalmic surgical system may include a handheld probe. The probe may include a housing sized and shaped for grasping by a user. The probe may include a tip extending from the housing and being sized to penetrate and treat an eye of a patient. The tip may include an aspiration lumen arranged to carry fluid away from the eye. The probe may include a peristaltic pump disposed within the housing. The pump may include a roller in contact with a deformable conduit in fluid communication with the aspiration lumen. The roller may be arranged to deform the conduit while in contact therewith. The pump may also include a roller driver in contact with a periphery of the roller in a manner that moves the roller along the conduit to urge the fluid through the conduit.

Abstract: A two-cavity pump having a single valve in one cavity and a bidirectional valve in another cavity is disclosed. The pump has a side wall closed by two end walls for containing a fluid. An actuator is disposed between the two end walls and functions as a portion of a common end wall of the two cavities. The actuator causes an oscillatory motion of the common end walls to generate radial pressure oscillations of the fluid within both cavities. An isolator flexibly supports the actuator. The first cavity includes the single valve disposed in one of a first and second aperture in the end wall to enable fluid flow in one direction. The second cavity includes the bidirectional valve disposed in one of a third and fourth aperture in the end wall to enable fluid flow in both directions.

Abstract: A bi-directional pump system that can be configured for a plurality of operating modes. The bi-directional pump system includes a plurality of bi-directional pumps each having their own valving system that are connected to a common high pressure manifold, a low pressure manifold and a suction manifold. Via the respective valve systems, each pump can be configured into: (1) a single-acting pumping mode; (2) a double-acting pumping mode; (3) an inactive free motion mode; and (4) an inactive rigid mode. One exemplary application of the bi-directional pump system is on an articulated wave energy conversion system that consists of three floating barges: a front barge, a center barge and a rear barge where the front barge and center barge are hingedly connected as are the center barge and the rear barge. A first set of the bi-directional pumps span the first hinge connection and the second set of bi-directional pumps span the second hinge connection.

Abstract: There is disclosed a modular, linearly actuated high-pressure pump for use in various applications with high-pressure fuel systems, in particular liquid cryogenic fuels such as Natural Gas, Hydrogen, Nitrogen and Argon (LNG/LH2/LN2/LAR). The pump utilizes linear actuation which smooths out the power profile. There are no dynamic seals which prevents failure from leakage. The primary benefit of a smooth, no pulse output and lack of dynamic seals is a longer life of the pump. Marine fuel systems that utilize cryogenic LNG are a primary application.

Abstract: A hydraulic regulating device includes a continuously adjustable regulating valve with a control piston. The control piston is displaceable in a first direction in which a connection of a pump port to an actuating-pressure port is configured to be controlled to open. The control piston is also displaceable in a second direction in which a connection of the actuating-pressure port to a tank port is configured to be controlled to open. In the first direction, the pump pressure acts on the control piston, and in the second direction, a control pressure and a spring act on the control piston. During movement of the control piston in the first direction, a damping connection, equipped with a damping nozzle, from the pump port to the tank port is configured to be controlled to open.

Abstract: A method for determining cavitation in a pump is disclosed. The method includes detecting, by a sensor, a pressure of a fluid pumped by the pump and determining, by a controller, whether the pressure exceeds a pressure range. Cavitation is determined when the pressure exceeds the pressure range. The method includes selectively incrementing or decrementing, by the controller, a counter value of a counter based on determining whether the pressure exceeds the pressure range. The counter value is incremented when the pressure exceeds the pressure range, and decremented when the pressure does not exceed the pressure range. The method includes determining, by the controller, whether the counter value exceeds a threshold value, and generating, by the controller, an alert when the counter value exceeds the threshold value and causing, by the controller, the alert to be displayed via a display.

Abstract: A plunger pump fluid end housing assembly comprising: a fluid end housing, multiple plungers a single suction valve and seat corresponding with each said plunger, and one or more discharge valves and seats corresponding with each said plunger; wherein axes of said suction valve and seat are parallel with said plunger, the axes of said discharge valves and seats are substantially parallel to each other and perpendicular to the said plunger axis, and the suction manifold is positioned to feed the fluid chamber opposite the power end of the fluid end.

Abstract: A foam pump for generating a foam comprising a foamable liquid and air has dual, coaxial air and liquid cylinders, each having a respective air and liquid piston which move together during a dispensing operation. In certain embodiments, the air and liquid cylinders are modular, separately formed components. In certain embodiments, a plurality of differently sized, liquid cylinders are provided, each with a corresponding liquid piston which is complementary in size thereto. Providing multiple differently sized liquid cylinder and piston components allows the pump to be configured to deliver a desired quantity of foamable liquid and/or a desired liquid-to-air ratio in the foam output of the pump. The differently sized liquid cylinder and piston components can be used interchangeably with a common air cup design and other common pump components, the modular construction allowing custom pump output configurations to be provided with minimal tooling investment per output size.

Abstract: A micro pump (10) is provided, wherein the micro pump (10) includes a housing main body (1), a housing upper part (3), a housing lower part (2) and at least one locking structure (4). The housing upper part (3) includes at least one inlet valve (1a) and at least one outlet valve (1b). The housing upper part (3) is separate from the housing main body (1). The housing lower part (2) is separate from the housing main body (1) and the housing upper part (3), wherein the housing main body (1) is arranged in a sandwich-like manner between the housing upper part (3) and the housing lower part (2), such that the housing upper part (3) is operatively coupled with the housing lower part (2) via the at least one locking structure (4).

Abstract: A closure element for a fluid end assembly that has two or more recessed grooves formed in its outer surface. The grooves are axially offset. A seal is placed in one and only one of the grooves. As wear occurs, the seal is relocated to one of the other grooves. Instead of a series of axially offset grooves in a single closure element, a kit may be formed from two or more otherwise identical closure elements, each with a single recessed groove at a different axial position. Another closure element has a series of ledge-like surfaces defining spaces within which a seal may be received. One outer surface surrounds one or more of the other surfaces. A seal is placed in one and only one of the spaces. As wear occurs, the seal is relocated to one of the other spaces.

Abstract: A rotary device for use with a fluid includes a housing, a rotor, a ring, and at least one vane. The housing includes a tubular surface defining, in part, a tubular volume. The housing is segregated into at least a pumping zone positioned between first and second working zones. The first working zone is configured to receive a fluid and the second working zone is configured to output the fluid. The rotor is mounted for rotation about a rotation axis. The rotor includes a body mounted within the tubular volume. The body includes a plurality of slots. The ring is at least indirectly coupled to the housing by way of a bearing. The at least one vane is associated with one slot of the plurality of slots. The at least one vane is connected at least indirectly to the ring and configured to rotate within the tubular volume.