Abstract: A filter element is provided with a snorkel that facilitates bleeding of air along the outside periphery of a tubular filter media pack to a bleed chamber contained within the filter element. This may be employed in fuel filtration applications during installation and removal of filter elements whereby air can be temporarily trapped in a housing containing the filter element. The snorkel thus vents the air along the outside of the filter element and then into a bleed chamber where it can be communicated to a standpipe having an isolated bleed passage.

Abstract: A fuel injection system in the present invention is provided with a fuel injection valve (10) which incorporates a heater (20) for heating fuel before being injected. The temperature of the heater (20) is estimated on the basis of the resistance value RHtr of the heater (20). The temperature of the heater (20) estimated at or after the time of occurrence of a point of inflection in the resistance value RHtr of the heater (20) is corrected in order to reduce to zero the difference between the nucleate boiling start point temperature and the estimated temperature value of the heater (20) at the time of occurrence of the point of inflection.

Abstract: Nozzles and method of making the same are disclosed. The disclosed nozzles have an inlet face and a three-dimensional outlet face opposite the inlet face. The nozzles may have one or more nozzle through-holes extending from the inlet face to the outlet face. Fuel injectors containing the nozzle are also disclosed. Methods of making and using nozzles and fuel injectors are further disclosed.

Abstract: A method for determining charge air mass flow rate comprises a turbocharger speed sensor with a closed loop observer that is based on a modeled turbocharger revolution rate. An open loop charge air mass flow rate is determined in a characteristic field stored in an engine controller and is corrected by the scaled difference between the measured and modeled turbocharger revolution rates. The corrected closed loop charge air mass flow is fed back to model the subsequent turbocharger revolution rate and to update the open loop charge air mass flow rate in the characteristic field.

Abstract: In the method provided herein, quantities of fuel are determined during a direct injection of a motor vehicle. In this connection, within one work cycle, test injections are carried out in two cylinders of an internal combustion engine of the motor vehicle during overrun phases, speed oscillations of moved masses of the cylinders are measured and a relative difference in quantity of the fuel quantity of the test injections within one work cycle is determined from the speed oscillations. By evaluating a relative signal between the test injections within one work cycle in the two cylinders, an intrinsic dependence of the drive train of the quantity of fuel signal is compensated.

Abstract: A fuel injector has a plurality of injection fuel delivery passages, which transport fuel from a proximate end to an injector cavity near the distal end of the fuel injector, wherein less than a total number of injection fuel delivery passages include an orifice. This configuration provides a reduction in fueling variation from pulse to pulse (multi-pulse) with respect to pulse separation due to pressure variation while allowing a sufficient amount of fuel flow to the injector cavity. Thus, the consistency of Start-Of-Injection (SOI) and opening rate both improve significantly and advantageously. For compactness, the orifices may be positioned in a cover plate used to retain the components of the injection control valve assembly and may further be arranged in an arc segment when viewed along a longitudinal axis.

Abstract: A method for initializing a generator may include sending a field reference voltage to an exciter that may provide a direct current (DC) current and a DC voltage to a rotor of a generator based on a current set point that corresponds to the field reference voltage. The method may then include receiving a voltage feedback signal output by the generator, determining one or more locations of one or more poles of the generator based on the voltage feedback signal, and sending one or more firing signals to one or more switches of a starter after determining the locations of the poles, such that the switches couple the voltage to a stator of the generator.

Abstract: A vehicle includes an internal combustion engine having an auto stop function, an electric pump motor drivably coupled to a transmission pump and a heat exchanger pump, and at least one controller. The controller is configured to control the pump motor to operate the transmission pump to supply hydraulic pressure to a transmission, and to operate the heat exchanger pump to provide flow from the engine to a heater core radiator in response to the engine being auto stopped.

Abstract: System for controlling an internal combustion engine, the system comprising stop means to stop automatically an internal combustion engine according to a predefined operating condition of the internal combustion engine, verification and/or restoration means to verify or to restore a first component of the internal combustion engine, learning means to learn a control variable of a second component of the internal combustion engine, inhibition means of the stop means to prevent/ignore an engine stop, wherein only the verification and/or restoration means, when activated, are suitable to cause an activation of the inhibition means, and wherein the learning means are enabled to activate only when the verification and/or restoration means are active.

Abstract: A control device of a vehicle includes: a first gear connected to a crankshaft of an engine; a second gear capable of engaging the first gear; an actuator configure to move the second gear up to a position where the second gear engages the first gear; a motor configured to cause the second gear to rotate; and a controller configured to, when the engine is cranked by driving of the motor in response to elapsing of a predefined period after the actuator is actuated in response to a startup request signal of the engine, adjust a length of the predefined period on the basis of an operating state of a driver and a state of the vehicle at the time of reception of the startup request signal.

Abstract: An electromagnetic switch device for a starter includes a pinion-pushing solenoid for pushing out a pinion toward a ring gear of an engine by a plunger thereof, and a motor-energizing solenoid for energizing the motor. The electromagnetic switch device is configured to detect a magnetic flux change in a magnetic circuit of the motor-energizing solenoid due to displacement or deformation of a core of the motor-energizing solenoid caused when the plunger of the pinion-pushing solenoid abuts against a stopper, to determine a timing to start current supply to the motor-energizing solenoid.

Abstract: In order to provide an engine automatic stop and restart apparatus capable of realizing excellent startability, and preventing an excessive load from being imposed on a starter (30) and a power transmission system, a starter drive inhibition determination section (12) inhibits, in a case where an engine restart condition is satisfied, when a backward rotation of an engine (20) is detected based on a crank angle of a crankshaft of the engine (20) detected by a crank angle sensor (1) for detecting the crank angle, a drive of the starter (30) configured to crank the crankshaft so as to restart the engine (20), and releases, when a stop of the engine (20) is detected, the drive inhibition of the starter (30).

Abstract: A heating device for a drive unit in a motor vehicle is disclosed. The heating device includes at least one heating element and at least one sensor by means of which a predetermined behavior of the vehicle user preceding the start of the drive unit can be detected. The sensor interacts with the heating element in such a manner that it is switched on when the sensor detects the predetermined behavior. The predetermined behavior may be one or more of the following: inserting an ignition key in an ignition lock of the motor vehicle; actuating a shifting, clutch or braking device of the motor vehicle; or a behavior through which an anti-theft device of the motor vehicle can be triggered. A method for controlling a heating device for a drive unit in a motor vehicle is also disclosed.

Abstract: An ignition system includes: a step-up transformer having a primary side and a secondary side; an electric energy source which is able to be connected to the primary side; a spark gap, which is designed to carry a current transferred to the secondary side by the step-up transformer. The step-up transformer has a bypass for transferring electric energy from the electric energy source to the secondary side. The bypass is designed to support a decaying electrical signal in the secondary coil of the high-voltage generator as of a predefined time, or as of a predefined intensity of the current being reached.

Abstract: An ignition system includes: a step-up transformer having a primary side and a secondary side; an electrical energy source configured to be selectably connected to the primary side; a spark gap which is configured to guide a current transferred by the step-up transformer to the secondary side. The step-up transformer has a bypass for transferring electrical energy from the electrical energy source to the secondary side. The ignition system is configured to couple electrical energy in series or in parallel to the secondary side of the high voltage generator for the purpose of maintaining an ignition spark as an electrical voltage in the form of a controlled pulse sequence, e.g., within the kilo-hertz range.

Abstract: The invention relates to an impeller for a Kaplan turbine, comprising the following features or components: a shaft, a plurality of blades; a hollow hub which is located on the free end of the shaft and which carries the blades; an adjustment device for rotating the blades around axes of rotation perpendicular to the axis of rotation of the shaft. The invention is characterized by the following features: the interior of the hub is connected to a source of compressed air; branch lines are provided inside the hub to supply the compressed air to bearings or other lubrication points for the adjustment device.

Abstract: By outside seawater flowing through a passageway into a water tank having a prescribed volume and installed in the sea with top above the surface of the water, power is generated by a generator provided in the passageway. Therefore, by means of the simple configuration of installing the water tank in water, it is possible to store a prescribed amount of electric power depending on the volume of the water tank and loss is low because the length of the passageway for guiding the seawater into the generator is extremely short compared with conventional systems, making it possible to supply as necessary stable electric power from hydroelectric power generation with good power generation efficiency.

Abstract: A wave energy converter (10) is operable to convert energy conveyed in ocean waves propagating in a wave propagation direction (40) in an ocean environment and received at the converter (10) into generated power. The converter (10) includes a plurality of columns (20) which are in fluidic communication via corresponding ports (50) to the ocean waves received at the converter (10). The ports (50) are arranged substantially in series along the wave propagation direction (40), and the ports (50) are of progressively greater depth into the ocean environment along the wave propagation direction (40) so as to cause the ocean waves to propagate in a downwardly-directed manner (45) when received at the ports (50). The plurality of columns (20) are arranged so that that their elongate axes are substantially aligned along a first direction, and that the ports (50) have corresponding port angels (?) relative to the first direction which are progressively larger as the ports (50) are of progressively greater depth.

Abstract: The invention relates to a device for assembling a structure constructed from components, in particular a wind turbine. The device includes a lifting means placed on a surface for the purpose of placing a component on an available support structure, wherein a boom of the lifting means is provided with a main hoisting cable with attaching means, such as a hoisting tackle, for releasable attachment of the component for lifting to the boom. The boom further includes a guide device for the attaching means, the guide device is connected to the boom for displacement along a longitudinal axis of the boom by means of a displacing device, and the guide device is configured to limit movement of the attaching means in at least one direction. The invention likewise relates to a method which makes use of the invented device.

Abstract: A wind turbine can include a first rotating ring and a second rotating ring. A first plurality of airfoils is pivotally secured between an interior rim and an exterior rim of the first rotating ring and disposed at a first angle of attack. A second plurality of airfoils is pivotally secured between an interior rim and an exterior rim of the second rotating ring and disposed at a second angle of attack. A generator is mounted between the first rotating ring and the second rotating ring and generates electricity in response to the first plurality of airfoils capturing the wind with the first angle of attack such that the first rotating ring rotates in a first direction and the second plurality of airfoils captures the wind with the second angle of attack such that the second rotating rings rotate in an opposite direction from the first rotating ring.

Abstract: The invention is entirely in keeping with the industry of renewable energies, particularly those using kinetic energy from fluids. The invention comprises the non-conventional design of the shape or geometry of a rotor blade, such rotor being or not being coupled to a machine which generates power from the transformation of kinetic energy that a fluid in movement has. The fundamental purpose of the design is to improve the efficiency in which fluid kinetic energy is transformed, thus being able to obtain better power coefficient values and therefore better performance when generating power. Said rotor must have as a minimum two (2) blades (e) for the operation thereof and is primarily designed for wind power generation applications.

Abstract: A wind turbine blade having a blade surface comprising a pressure side and a suction side, comprising one or more flow disturbing devices for provoking air flow separation arranged on the suction side of the blade, wherein the flow disturbing device is removable.

Abstract: An apparatus for extracting power includes a track and an airfoil coupled to the track. The track includes first and second elongate sections, where the first elongate section is positioned above the second elongate section. The airfoil includes a suction surface lying between a pressure surface and the track, and is moveable in opposite directions when alternately coupled to the first elongate section and second elongate section.

Abstract: A wind turbine assembly is provided. The assembly includes a support structure and a wind turbine mounted on the support structure. The wind turbine includes a front face with blades defining a surface area to engage incoming wind, a roll axis about which the wind turbine can rotate in response to incoming wind to drive an electric generator, where the support structure defines a horizontal tilt axis about which the wind turbine can pitch forward and backward. The tilt axis divides the surface area of the wind turbine into upper and lower portions of unequal size, such that incoming wind on the front face of the wind turbine applies unequal force to the upper and lower portions of the surface area of the wind turbine to induce pitch of the wind turbine about the tilt axis.

Abstract: The invention concerns a method of operating a wind power installation in which the rotor is brought to a halt and fixed, comprising the steps: braking the rotor, positioning the rotor at a stopped position, and fixing the rotor in the stopped position. According to the invention it is provided that an end position is predetermined, the rotor is braked in regulated fashion to a stopped position associated with the end position, and for positioning for the predetermined end position the rotor is braked in an automated procedure until stopped at the stopped position, and for fixing in the stopped position a mechanical fixing device is applied, in particular automatically.

Abstract: The invention relates to a wind power plant control system arranged for controlling one or more wind turbine generators in a wind power plant, wherein the wind power plant control system comprises a power plant controller and a modeling unit, the modeling unit being operatively coupled to the power plant controller. The modeling unit is arranged to calculate estimated values of electrical output parameters from the one or more wind turbine generators, and to output said estimated values to the power plant controller. The power plant controller is arranged for determining reference signals for dispatching to the one or more wind turbine generators, wherein the estimated values of said electrical output parameters are used by the power plant controller in the determination of said reference signals. The invention also relates to a corresponding method of controlling a wind power plant.

Abstract: A method for operating a wind farm is provided. The wind farm includes at least two groups of wind turbines, each of the at least two groups of wind turbines includes at least one wind turbine of the wind farm, each of the wind turbines of the wind farm belonging to one of the at least two groups of wind turbines. The method includes determining a power setpoint for the wind farm, determining a group curtailment setpoint for each of at least two groups of wind turbines, determining a power production value of each of the at least two groups of wind turbines, determining for each of the at least two groups of wind turbines a power reference value using the respective group curtailment setpoint and the respective power production value, determine for each of the at least two groups of wind turbines a group power setpoint which is proportional to the respective power reference values, and operating the at least two groups of wind turbines in accordance with the respective group power setpoint.

Abstract: A wind turbine rotor shaft arrangement comprising a rotor shaft, a first support structure for supporting the rotor shaft, and a first rolling bearing arranged to support the rotor shaft in relation to the first support structure. The first rolling bearing comprises an inner ring, an outer ring, a set of rolling elements, and an attachment portion for securing the inner ring. The attachment portion comprises an radially outer support surface, wherein the radially outer support surface of the attachment portion is expanded radially outwards for securing the inner ring by an expansion member being driven into the attachment portion. A method for manufacturing a wind turbine rotor shaft arrangement.

Abstract: A hydraulic control system HCS for controlling a variable ratio transmission of a power generating system. A hydraulic motor/pump unit 140 is operably connected to a superposition gear, and is connected to a hydraulic circuit that comprises an orifice 28 and/or a relief valve 29 that opens at a predetermined hydraulic pressure. The hydraulic circuit switches between a variable low-speed operating mode and a torque limiting high-speed operating mode. In the torque limiting high-speed operating mode the hydraulic motor/pump unit 140 is driven by the superposition gear and drives hydraulic fluid through the orifice 28 and/or relief valve 29 to provide a passive torque limiting function. In the variable low-speed operating mode the hydraulic motor/pump unit 140 drives the superposition gear and the hydraulic control system provides a desired rotor 101 speed by controlling hydraulic fluid flow rate through the hydraulic motor/pump unit 140.

Abstract: Actuators (artificial muscles) comprising twist-spun nanofiber yarn or twist-inserted polymer fibers generate torsional and/or tensile actuation when powered electrically, photonically, chemically, thermally, by absorption, or by other means. These artificial muscles utilize non-coiled or coiled yarns and can be either neat or comprising a guest. Devices comprising these artificial muscles are also described.

Abstract: A method, system and program product comprise applying a source of heat to a heatable object for a first predetermined period of time. The applying is conveyed by a terminal device. The heatable object is positionable within a sensing range of a motion detector. The applying of the heat source is stopped for a second predetermined period of time. The stopping enables the heatable object to cool in which a cycle of the applying and the stopping with motion of said heatable object is detectable by the motion detector.

Abstract: A method, system and program product comprise receiving an activated signal from a first motion detector. The activated signal indicating an object is detected by the first motion detector. A source of heat is applied to a heatable object for a first predetermined period of time in response to the receiving. The applying is conveyed by a terminal device. The heatable object is positionable within a sensing range of a second motion detector. The applying of the heat source is stopped for a second predetermined period of time. The stopping enables the heatable object to cool in which a cycle of the applying and the stopping with motion of said heatable object is detectable by the second motion detector wherein the detection by the first motion detector is relayed to the second motion detector.

Abstract: Electronically controlled linear pump drive actuator for a dispensing pump has a servo motor unit having a stator with front and rear faces and a central hollow cavity, a rotor coaxially in the hollow cavity with a front portion having a front end with an open central bore and a shaft with a stepped diameter forming a rear extension, front and rear support members respectively for the front and rear faces, a support bearing in the rear member, a front bearing, and a position sensor; a ball screw drive mechanism having a nut connected with the rotor and a screw shaft having a front end section; a hollow cylinder attached to the front member's front end; an actuator member axially moveable in the hollow cylinder with a central rear part fixed to the front end section, and a hollow front part; and a pump plunger adaptor.

Abstract: Setting of the pressure sensing mechanism which controls an opening degree of the first valve body is changed by transmitting driving force of the driving force transmission member to the first valve body via the second valve body. According to this configuration, when the second valve body has been opened while conduction of electricity to the electromagnetic solenoid has been stopped, the refrigerant gas from the discharge chamber is supplied to the control pressure chamber via the passage, the valve chamber, the communication opening, the insertion hole, the first passage, the second passage, the housing chamber, the passage, the second pressure adjusting chamber, the communication hole, the first pressure adjusting chamber, the first shaft inner passage, and the second shaft inner passage.

Abstract: A vehicle air compressor apparatus is provided for a heavy vehicle air braking system. The apparatus comprises a crankcase, and a cylinder head disposed on the crankcase. The cylinder head includes (i) an air inlet port through which air can be received for compression within the crankcase and the cylinder head, (ii) a discharge port through which compressed air can be delivered from the cylinder head, (iii) a first port through which compressed air can pass, and (iv) a second port through which cooled compressed air can pass. The apparatus further comprises a discharge air cooling jumper connected externally of the cylinder head between the first and second ports. The jumper is arranged to cool compressed air passing from the first port through a discharge air path of the jumper to the second port to provide cooler compressed air to be delivered from the cylinder head through the discharge port.

Abstract: A compressor for compressing a refrigerant comprising a cylinder block, a cylinder cover (12) and a valve plate (10) which is interposed between the cylinder block and the cylinder cover (12), said valve plate (10) being connected to the cylinder cover (12) and/or to the cylinder block without redundancy in the sealing plane.

Abstract: A communication pipe outlet (263) of a suction muffler (26) included in a hermetic compressor (10) includes a communication opening (264). An upper shape (264a) of the communication opening (264) is a curved protruding shape, and a lower shape (264b) of the communication opening (264) is a rectangular shape. A suction hole (33) of a valve plate (30) included in the hermetic compressor (10) is formed such that the cylinder side of the suction hole (33) has a non-recessed closed-curve shape, and the communication pipe side of the suction hole (33) has a shape similar to that of the communication opening (264). The valve plate (30) and a communication pipe (262) are connected in a state where an upper peripheral surface of the communication opening (264) of the communication pipe outlet (263) corresponds to an upper peripheral surface of the suction hole (33).

Abstract: The compressor comprises: a shell carrying a gas outlet tube and housing a cylinder cap having a gas outlet; and a plastic discharge tube having an inlet end and an outlet end respectively coupled to the gas outlet and to the gas outlet tube, at least one of said inlet and outlet ends being connected to a discharge part, defined at the gas outlet or at the gas outlet tube, by a connecting element having: a fixation portion, affixed inside the discharge part; an engaging portion fitted inside one end of the discharge tube and carrying a superficial indexing means acting against the discharge tube; and gripping means disposed between the indexing means and the fixation portion; and a retaining ring mounted around the discharge tube for compressing the latter, in order to spike, therein, the gripping means.

Abstract: A sprayer system having a trailer, which is pulled by a tractor or other tow body, and has a tank carrying liquid to be sprayed and a spray head. The trailer has a peristaltic pump mounted on a frame and driving pumping power from the wheels of the trailer so that the sprayer is self pumping when the trailer is pulled. The peristaltic pump provides a smooth flow by providing a multiplicity of pulses of liquid produced by the pump from the rotation of the trailer wheels by wrapping the compressible tube of each pump around an assembly of rollers which are rotated by drive wheels. The tube is wrapped at least 360° around the rollers and is held stationary by being connected to fixed outlet and inlets of each pump. The tube lies side by side on at least one of the rollers of each assembly and overlaps that roller.

Abstract: A liquid transport apparatus includes: a flow channel forming member; a cam; a pressing member; a rotor configured to be rotated; a decelerating unit configured to transmit the rotation to the cam; a cam-side measuring unit configured to output a cam-side reference signal indicating the fact that the cam reaches a predetermined rotational angle; a first measuring unit configured to output a first signal when the rotor rotates; a second measuring unit configured to output a second signal indicating the fact that the rotor reaches a predetermined rotational angle; and a determining unit configured to determine a reference of the first signal on the basis of the second signal output after an output of the cam-side reference signal. The liquid transport apparatus is capable of determining a signal original point without variations to obtain a relationship between the signal original point and a pump original point easily.

Abstract: An elongate air operated pump includes a pump chamber, a bladder inside the pump chamber, inlet and outlet valves to and from the chamber and an air control system. The air control system includes a control valve alternately communicating compressed air and exhaust to atmosphere to a venturi with a first end, a second end and a throat port. The first end of the venturi receives continuous compressed air. The second end receives the alternately communication of compressed air and exhaust to atmosphere from the control valve. The throat port of the venturi is in continuous communication with the bladder to pressurize and draw a vacuum on the bladder. The valves may be pneumatic pinch valves controlled by the control valve to cycle with the bladder or passive one-way pump valves.

Abstract: A counterbalance system may include an outrigger support structure, a first elongated outrigger member, and a second elongated outrigger member. The outrigger support structure is adapted to be mounted in an operating position on a walking beam of a pumping unit. The first elongated outrigger member is connected to the outrigger support structure at a first lateral side of the counterbalance system. The second outrigger member is also connected to the outrigger support structure, but is connected at a second lateral side of the counterbalance system. A first suspension element may be connected to the first outrigger member and a second suspension element may be connected to the second outrigger member. Suitable counterbalance weights may be connected to the first suspension element while additional counterbalance weights may be connected to the second suspension element.

Abstract: Described is a method of generating a flow having a composition gradient. A plurality of pump strokes is generated for each pump in a plurality of pumps. Each pump stroke has an initiation time and provides a volume contribution of a liquid to be mixed in the flow according to the composition gradient for the flow. The pump strokes of the pumps are controlled so that a sum of the volume contributions of the liquids that occurs between consecutive initiations of one of the pumps is maintained at a constant value throughout the duration of the flow. For each pump, the flow rates and the times between stroke initiations can change as long as the sum of all volumes contributed between the consecutive initiations of one of the pumps is held constant. Advantageously, the method achieves a constant compositional noise characteristic throughout the duration of the flow.

Abstract: A liquid transport method includes rotating a cam from a reference position of rotation of the cam rotating for transporting liquid; determining whether or not the cam rotates to a predetermined rotational angle on the basis of an image of a liquid transport apparatus captured when the cam is rotated and stopped; and memorizing a signal value indicating a rotational angle of the cam from the reference position of rotation until the cam rotates to the predetermined rotational angle. With this method, the relationship between a signal original point and a pump original point is obtained easily.

Abstract: An industrial fluid circulation system and method has at least one fluid circulation circuit in an industrial process, such as an HVAC system. The at least one fluid circulation circuit includes a plurality of pumps connected in parallel to circulate a fluid through the at least one fluid circulation circuit, with at least two of the parallel connected pumps operating at all given loads. A separate motor drives each pump and a speed control is used to vary the speed of each motor to thereby vary the pumping capacity of each parallel connected pump. A load detector is provided to sense operating loads on the system, and each operating pump runs simultaneously at all loads, relative to a maximum pump speed, at a substantially similar reduced speed, a predetermined equal reduced speed or a predetermined almost equal reduced speed.

Abstract: A positive displacement machine comprises a cylinder inside which there are a mobile piston, at least one first and one second insulation chamber containing a respective set of gaskets, at least one first and one second gland each of which is suitable for operating on one of the sets of gaskets, each gland comprising a tubular threaded portion and a ring nut fixedly attached to the tubular threaded portion. A sleeve able to slide with respect to said cylinder has a first end in contact with the first set of gaskets and a second threaded end for receiving in engagement the tubular threaded portion of the second gland, the sleeve being slidingly engaged by the first gland, and at least one of the ring nuts being a cylindrical gear wheel with straight teeth.

Abstract: A flexible sealing glove (100) applicable under radial tension to aerostatic linear compressors (200), capable of sealing the bearing channels (1, 2), which are located on the outer face (5) of the cylinder (14). The flexible sealing glove (100) is made of substantially polymeric material and its main functions are to increase the efficiency and the yield of the compressor (200).

Abstract: Disclosed are methods of enhancing resistance to erosion, corrosion, wear and tear, and fatigue in high-pressure pumps. One method includes providing a fluid end that comprises a body defining a pressure chamber in fluid communication with a plunger bore having a plunger reciprocably disposed therein, a suction valve pocket defined in the body and having inlet valve assembly arranged therein that includes a suction valve and a suction valve seat, and a discharge valve pocket defined in the body and having a discharge valve assembly arranged therein that includes a discharge valve and a discharge valve seat, and applying a wear-resistant substance directly to a surface of at least one of the pressure chamber, the plunger, the suction valve pocket, the suction valve, the suction valve seat, the discharge valve, and the discharge seat.

Abstract: In a gear pump, an outer inner wall surface of a suction port which is located on a downstream side in a rotor rotation direction, that is, a first inner wall surface, is located inward of a bottom land between internal teeth of an outer rotor, and the suction port has a shallow portion extended inward from the first inner wall surface on the downstream side in the rotor rotation direction, and a deep portion that is formed so as to be continuous with the shallow portion and that is deeper than the shallow portion. Communication between an inter-tooth chamber and the suction port is cut off with the inter-tooth chamber facing only the shallow portion.

Abstract: A macerator pump apparatus (MPA) includes a waste valve assembly (WVA), a macerator assembly, a pumping assembly, and a quick disconnect discharge assembly (QDDA). An inlet port of the WVA receives waste matter from a waste holding tank (WHT). A valve member positioned within the WVA directs flow of the waste matter to the macerator assembly and isolates the waste matter within the WHT by closing the valve member before the MPA is disassembled for maintenance. The macerator assembly macerates the waste matter and transfers the macerated waste matter to the pumping assembly and to a discharge port of the QDDA. A quick disconnect member detachably connects an outlet plumbing pipe to the discharge port via a quick disconnect valve (QDV) for discharging the macerated waste matter. The QDV isolates the macerated waste matter within the outlet plumbing pipe by closing the QDV before the MPA is disassembled for maintenance.