Abstract: A heat exchanger for cooling heated gas using a liquid coolant includes a tubular housing with one or more intake apertures circumferentially spaced around a coolant distribution portion of the housing. A tube retention cap sealedly engages the front end of the tubular housing, and includes at least one gas tube orifice. An annular coolant chamber surrounds the coolant distribution portion, which distributes liquid coolant around the intake apertures and directs coolant into the cavity and within the tubular housing. Positioned within the tubular housing is at least one elongated gas tube, which is sealedly engaged with the tube orifice. Liquid coolant flowing in, through a coolant inlet, is directed around the annular coolant chamber and distributed into the cavity of the tubular housing, immersing the elongated gas tube and facilitating heat exchange from the heated gas flowing through the elongated gas tubes immersed within the liquid coolant.

Abstract: An exhaust gas cooler comprises at least one exhaust gas pipe for exhaust gas being cooled and is characterized in that at least one gap is provided between the wall of the exhaust gas pipe and laterally adjacent components at the inlet of at least one exhaust gas pipe in the direction of extension of at least one wall perpendicular to the flow direction of the exhaust gas.

Abstract: Methods and systems are provided for indicating whether a canister purge valve in a vehicle evaporative emissions control system is degraded. In one example, an air intake system hydrocarbon (AIS HC) trap temperature may be monitored during a refueling event, and responsive to an indication that the AIS HC trap temperature change is greater than a predetermined threshold, it may be indicated that the canister purge valve is degraded. In this way, diagnosis of whether a vehicle canister purge valve is degraded may be indicated without the use of engine manifold vacuum, and may be advantageous for vehicles configured to operate for significant amounts of time without engine operation, or without intake manifold vacuum.

Abstract: In one aspect, an air intake system for supplying air to an engine of a work vehicle may include a cooler box having a first wall and a second wall, with the first and second walls at least partially defining a chamber within the cooler box. The air intake system may also include a screen defining at least a portion of the first wall of the cooler box. Furthermore, the air intake system may include an air filter assembly defining at least a portion of the second wall of the cooler box. The air filter assembly may be configured to remove particles present in the air exiting the chamber of the cooler box through the air filter assembly. The air exiting the cooler box through the air filter assembly may be supplied to the engine for combustion.

Abstract: A first downstream part of an intake manifold has a first downstream passage configured to communicate with an intake port of a first cylinder head. A second downstream part of the intake manifold has a second downstream passage configured to communicate with an intake port of a second cylinder head. An upstream part is coupled to the first downstream part and the second downstream part. The upstream part is arranged upstream from the first and second downstream parts in the flow direction of intake air and has a first upstream passage and a second upstream passage. The material of the first downstream part and the material of the second downstream part both have higher rigidity than the material of the upstream part.

Abstract: An electronic fuel injection system for land vehicles, comprising: a fuel tank, at least one pump, a fuel sump, wherein the at least one pump is operatively coupled to and between the fuel tank and the sump, and an engine, wherein the engine is operatively coupled to the fuel sump. A fuel sump system for land vehicles, comprising: an inlet from a pump, wherein the pump is operatively connected to a fuel tank, a fuel pump system, a regulator operatively coupled to the fuel pump system, an outlet operatively coupled to an engine, and a float component, coupled to the inlet. An electronic fuel injection system for land vehicles, comprising: a fuel tank, at least one pump, a fuel sump, wherein the at least one pump is operatively coupled to and between the fuel tank and the sump, and an engine, wherein the engine is operatively coupled to the fuel sump and wherein the electronic fuel injection system does not require a return line from the engine to the fuel tank.

Abstract: The control device controls a fuel pump which repeatedly executes a discharge operation of pressurizing and discharging fuel in a pressurizing chamber with the pressurizing member. Furthermore, the control device includes: a pressurizing chamber temperature obtaining unit which obtains a pressurizing chamber temperature which is a temperature of the fuel in the pressurizing chamber; and a discharge amount control unit which increases a fuel discharge amount by one discharge operation of the fuel pump when the pressurizing chamber temperature obtained by the pressurizing chamber temperature obtaining unit is higher than a threshold value.

Abstract: The present invention relates to a fuel system for an internal combustion engine, and a method to increase vaporization temperature of a fuel in the fuel system, which fuel system comprises a fuel tank, a fuel pump, a fuel filter device arranged downstream of the fuel pump, a first fuel conduit through which the fuel pump is arranged to supply fuel through the fuel filter device. A control valve, which opens and/or closes at a pre-determined pressure arranged upstream of the fuel filter device and downstream of the fuel pump, and a check valve arranged upstream of the fuel pump to prevent the fuel from flowing back to the fuel tank. A pressure, which is less than the pre-determined opening pressure of the control valve, is built up in the fuel pump after the internal combustion engine is turned off, for increasing vaporization temperature for hot start of the vehicle.

Abstract: A fuel distributor features a pressure accumulator 2 with a longitudinal hollow space 3 to receive pressurized fuel. The pressure accumulator 2 possesses at least one threaded socket 7 which connects with the longitudinal hollow space 3 and which features interior threading 8, and into which a threading cap 11 with exterior threading 13 is inserted. The threading socket 7 features a sealing surface 16, which ends up being pressed onto a sealing seat 18 set up inside the pressure accumulator 2. According to the invention, a leakage channel 27 is formed within the threading cap 11. The configuration of the fuel distributor according to the invention with the leakage channel 27 in the threading socket 7 allows leakage testing under high pressure to be carried out during a short cycle or detection times, and with a high degree of precision.

Abstract: The present invention relates to a method for producing an internally pressurized component (1), having the steps of: providing a main body (2) with a longitudinal cavity (3) and with an attachment flange (6) for attachment of the internally pressurized component (1), providing a bolt (80), introducing a through-bore (7) that extends longitudinally through the attachment flange (6) and has two opposite openings (70, 71) with respect to the longitudinal axis (L7), inserting the bolt (80) into the through-bore (7) such that the bolt (80) is arranged flush with the attachment flange (6) on the side of one of the openings (70) and extends from this opening (70) through the through-bore (7) and through the other opening (71) in order to project from the attachment flange (6), materially bonding the bolt (80) to the attachment flange (6), and introducing a longitudinal bore (81) into the bolt (80) to form an attachment sleeve (8). The invention also relates to a corresponding internally pressurized component (1).

Abstract: A fuel pump includes a pump head defining a barrel in which a plunger is slidable to pressurise fuel in a pumping chamber, and a fluid-inlet path through which fuel flows in to the pumping chamber under control of an inlet valve during a plunger return stroke. The plunger causes pressurisation of the fuel in the fluid-inlet path. The fuel pump may also include a fluid-outlet path through which fuel flows out of the pumping chamber, preferably under control of an outlet valve, during a plunger pumping stroke.

Abstract: In order to provide a piston device that is of simple construction and provides optimised sealing, it is proposed that the piston device should include the following: a housing that includes a piston receptacle; a piston that is arranged to be linearly displaceable in the piston receptacle; a main gasket element that separates a first medium space from a second medium space, and a supplementary gasket element, different from the main gasket element, for sealing in a region between the piston and the piston receptacle.

Abstract: An injection hole has an injection hole passage communicating an inner opening with an outer opening. The inner opening is smaller than the outer opening in cross-sectional area. The needle moves in a valve closing direction to abut against a valve seat to restrict a flow of fuel through the injection hole. A first inner wall of the injection hole is located on a valve closing direction side relative to an injection hole axis. A second inner wall of the injection hole is located on an opposite side of the injection hole axis from the valve closing direction side. The injection hole passage is defined by the first inner wall and the second inner wall.

Abstract: An improved fuel injection device for internal combustion engines comprising a slidable (pilot) valve instead of a needle valve principle. The valve does not comprise a seat, so, even in the case of a spring-loaded embodiment of the valve there is no risk of hammering of the valve on a seat with the pertaining generation of noise. The improved fuel injector allows a larger nozzle diameter and, therefore, a larger number of nozzle holes, if required or deemed useful. For rotating embodiments of the fuel injector, the valve or at least its spring, in the case of a spring-loaded embodiment of the valve, can be located in the static section of the rotating fuel injector, thus eliminating the balancing problem of prior art rotating fuel injectors which comprise a spring in the rotating section.

Abstract: In some embodiments of the present disclosure, sensors mounted on a vehicle can allow opportunities for coasting to be predicted based on environmental conditions, route planning information, and/or vehicle-to-vehicle or vehicle-to-infrastructure signaling. In some embodiments of the present disclosure, these sensors can also predict a need for power and/or an end of a coast opportunity. These predictions can allow the vehicle to automatically enter a coasting state, and can predictively re-engage the engine and/or powertrain in order to make power available with no delay when desired by the operator.

Abstract: A device for operatively connecting an engine starter to an engine where the engine includes an engine crankshaft and the engine starter has a starter shaft with a length and a worm, or worm screw, of a worm drive spaced radially from the starter adapter shaft and within the length of the shaft is described herein. The device compromises a worm gear assembly as operatively attached to the starter adapter shaft. The a worm gear assembly includes a worm gear, or worm wheel, positioned to engage the worm and an overrunning clutch positioned radially between the worm gear and the starter adapter shaft and operatively engaging the starter adapter shaft.

Abstract: Approaches for controlling dwell time in the ignition system of an internal combustion engine are provided. In one example, a method may include adjusting dwell based on engine operating conditions and further adjusting dwell in a manner proportional to existent spark plug conditions. By constantly assessing spark plug condition during operating of the internal combustion engine, premature wear of the spark plug may be prevented leading to an extension in the service life of spark plug and other ignition system components.

Abstract: An ignition testing system including a test article testing chamber, and at least one gas mixture verification chamber being communicably coupled to the test article testing chamber and being configured to verify at least a content of a gas mixture content provided to the test article testing chamber.

Abstract: The invention relates to the real-time determination of the forces applied by waves incident upon the moving part (2) of a wave-energy system (1). The method according to the invention is based on the construction of a model of the radiation force applied to the moving part (2) and a model of the dynamics of the wave-energy system (1). The invention uses only measurements of the kinematics of the moving part (2) and the force applied by the conversion machine (3) to the moving part (2).

Abstract: Disclosed herein is a novel method for operating a hydropower reservoir which is an improvement over the existing single-parameter (the current month) USACE Rule Curve approach, the improvement comprising the consideration of a second parameter, namely the water level of the reservoir at the beginning of the month, in the decision-making process for operation of the reservoir.

Abstract: A device for supplying and modifying the cylinder cubic capacity of a hydraulic motor, comprising: a first conduit (1) for supplying and discharging an operating fluid to a first side of the hydraulic motor (M); a second conduit (2) for supplying and discharging an operating fluid to a second side of the motor (M); an actuator (3) provided to modify the cubic capacity of the motor (M); an increase conduit (31) for increasing the cubic capacity of the motor (M), connected to the actuator (3) for supplying operating fluid to a side of the actuator (3) which produces an increase of the cubic capacity of the motor (M); a reduction conduit (32) for reducing the cubic capacity of the motor (M), connected to the actuator (3) for supplying operating fluid to a side of the actuator (3), which produces a reduction of the cubic capacity of the motor (M). The device is structured to supply to the increase conduit (31) and to the reduction conduit (32) a proportional pressure to the load acting on the winch.

Abstract: The invention relates to a method for producing or designing a leading edge of a lifting structure, wherein starting at the midpoint of the base (0,0), a curve is applied to the profile of the structure, the length “L1” of which is according to the maximum thickness of the NACA section in the base of the profile “H0” in the base and is defined by the equation L1=0.0510H02?0.0790H0+15.5790, and the maximum height of which on the “x”-axis is located at point “L1/2” and defined by means of the relationship x=0.0137(L1)1.4944, the shape of said curve being defined by means of the equation: (y?y0)=0.0000000107x6+0.0000016382x5?0.0000794412x4+0.0010194142x3+0.0097205322x2+0.0136993913x, and the rest of the curve being calculated by means of an iterative process according to the above.

Abstract: The wind power generation system comprises a generator, a shaft, at least one leaf group and at least one wind-guiding structure. The generator includes a rotor, and the shaft is connected to the rotor. The leaf group includes a movable barrel, at least one first blade, at least one propeller blade, a plurality of pressurized channels, a first vortex chamber and a decompression chamber. The movable barrel is movably sleeved on the shaft. The first blade is connected to the activity barred. The propeller blade is connected to the movable barrel and above the first blade.

Abstract: A vertical axis wind turbine having a varying length of a rotational diameter includes a plurality of vertical blades connected to a central shaft of a generator, the plurality of blades being provided at equal intervals on the outer circumference side of the central shaft, and each of the blades is provided with at least one support shaft member extending towards the central shaft, and in between each of the support shaft member and the central shaft is provided, respectively, with an elastic telescopic assembly, and each of the elastic telescopic assemblies is respectively driven by the centrifugal force of the blades above a rated speed to drive the support shaft member to extend outwardly, so that the rotation radius of each blade from the central shaft increases as the rotational speed increases.

Abstract: The present device is a vertically oriented wind turbine blade having a rectangular simple curvilinear shaped blade, which includes a top edge, a bottom edge, an outer edge, an inner edge, an inner surface and an outer surface. The blade is curved using a series of bent section to approximate as airfoil shape from the inner edge to the outer edge (relative to the turbine center or hub).

Abstract: The invention relates to a wind turbine system (1) with several wind turbine modules (2) mounted to a support structure (3). A control system is configured to determine a lift command (21) for a particular wind turbine module (2?) of the 5 plurality of wind turbines modules (2). The control system is applying the lift command (21) to a corresponding rotor blade pitch adjustment system of the particular wind turbine module (2?) so as to create a lift force (F_up) in the opposite direction of gravity on the particular wind turbine module mounted on the support structure. Providing an upwards lift force on one, or more, particular 10 wind turbine module(s) may reduce, or eliminate, static and/or dynamical loads from the wind turbine module on the support structure.

Abstract: A wind power generating device includes: a power source assembly and a power generating assembly, the power source assembly including a brake disc and a brake actuator, the brake actuator being configured to swing around a lever fulcrum, and the brake actuator being provided with a wind collector on one side with respect to the lever fulcrum to receive wind force and a brake pad corresponding to the brake disc on the other side such that when the wind collector swings backward because of wind force from the front, the brake pad relatively swings frontward to touch the brake disc by leverage so as to apply a brake force to a rotor component of the power source assembly, and the power generating assembly including a maximum power point tracker (MPPT) such that the generated electric energy is stored to an energy storage element under control of the MPPT.

Abstract: A method for controlling a wind farm having a plurality of wind turbines connected to a power grid includes terminating use of an existing farm-level controller of the wind farm. The method also includes installing an upgraded farm-level controller in place of the existing farm-level controller. Further, the method includes communicatively coupling the upgraded farm-level controller to each of the plurality of wind turbines. Moreover, the method includes replacing at least one component of a subset of the wind turbines with an upgraded component capable of satisfying one or more grid requirements. Thus, the method also includes controlling the wind farm via the upgraded farm-level controller.

Abstract: A method, system, apparatus, and/or device for generating electrical power from a solar cell and rotational energy from a blade of a wind turbine. The method, system, apparatus, and/or device a blade of a wind turbine, a solar cell, and a rotor system. The blade may be blade configured to catch wind from a surrounding area to rotate the blade and convert kinetic energy into rotational energy. The solar cell may be connected to an exterior surface of the blade. The solar cell may be configured to convert solar energy into electric energy. The rotor system may be electrically connected to the solar cell to receive the electric energy from the solar cell. The rotor system may be configured to remain stationary relative to the blade as the blade rotates about an axis. The rotor system is configured to send the electric energy to a power source.

Abstract: Controlling a wind turbine during a grid fault where the grid voltage drops below a nominal grid voltage. After detection of a grid fault, the total current limit for the power converter output is increased to a total maximum overload current limit. Depending on whether active or reactive current generation is prioritized, an active or reactive current reference is determined. The active current reference is determined in a way so that a reduction in active power production due to the grid voltage drop is minimized and based on the condition that the vector-sum of the active output current and the reactive output current is limited according to the total maximum overload current limit, and a maximum period of time is determined in which the power converter can be controlled based on the active/reactive current references. Afterwards the power converter is controlled based on the active and reactive current references.

Abstract: The present disclosure is directed to an internal reinforcement assembly for a tower of a wind turbine. The reinforcement assembly includes a plurality of reinforcing rod members spaced circumferentially about the tower. Each of the plurality of reinforcing rod members includes a first end and a second end. The reinforcement assembly also includes an adjustable mounting component configured with each of the second ends of the plurality of reinforcing rod members. As such, the adjustable mounting components are mounted to an interior wall of the tower at a location to be reinforced. Thus, the reinforcing rod members interact with the tower to reinforce the tower at the location to be reinforced.

Abstract: The invention relates to a device for measuring moments of a wind turbine, comprising a carrier pin that can be fixedly connected to a bedplate of a nacelle of the wind turbine, which is arranged on a tower and can be adjusted with respect to yaw, a torque support of a gearbox of the wind turbine being mountable on the carrier pin via an elastomer body, and to a method for operating a wind turbine and the corresponding wind turbine. The carrier pin is provided with one or more sensors that are designed and arranged to detect strains and/or shears of the carrier pin, a signal processing and/or evaluation unit being provided, which is connected to the sensor(s) and which can determine, during operation of the wind turbine, from measurement signals of the sensors, pitch moments and/or yaw moments that act upon the torque support.

Abstract: The invention relates to a heavy-duty upgrading method for rotor blades of existing wind turbines and to a plastic membrane used in the method according to the invention, wherein the rotor blades are covered and/or extended in that at least one fibre-reinforced or fabric-reinforced plastic membrane is fitted onto an outer surface of the original aerodynamic profile of the rotor blade being upgraded and the original contour of the rotor blade being upgraded is then joined to the upgraded rotor blade.

Abstract: Disclosed is a clock spring-based rotational force generating device capable of allowing a user to freely adjust rotation speed of an output shaft and preventing the output shaft from rotating slowly or never rotating due to an weakened unwinding force of a spiral spring in the late period of an operation span of the spiral spring. The device includes an input shaft, a main drive gear receiving the rotational force of the input shaft, a spiral spring wound around a main drive gear shaft, a speed gear to increase the rotational force of the main drive gear, a power transmission control gear sliding up and down to control transmission of the rotational force of the main drive gear to the speed gear, an output shaft outputting the rotational force increased by the speed gear, and a rotation speed control means for controlling the rotation speed of the output shaft.

Abstract: An electricity generation process is disclosed. The process comprises injecting an aqueous feed stream into a salt formation to dissolve the salt contained therein, and then extracting a saline stream containing said dissolved salt from the salt formation. The process also comprises converting latent osmotic energy present in said saline stream into electricity by passage through an osmotic power unit comprising a semi-permeable membrane which permits the passage of water but not the passage of salts in which said saline stream is passed over one side of the semi-permeable membrane, a low salinity stream being passed over the other side of said membrane. The process also comprises using an output stream derived from the low salinity stream as the aqueous feed stream.

Abstract: An actuator comprising a flexible substrate having a surface comprising one or more active regions, each of the active regions having disposed thereon an electrochemically active film comprising a plurality of 1T phase 2D MoS2 nanosheets which impart a first force upon the flexible substrate in response to electrochemical charging of ions in the 2D MoS2 nanosheets and impart a second force upon the flexible substrate in response to electrochemical discharging of ions in the 2D MoS2 nanosheets, wherein the first and second forces imparted to the flexible substrate each being sufficient to displace the flexible substrate. The flexible substrate may comprise a polymer substrate and the electrochemically active film may comprise a conductive layer having disposed thereon the plurality of 1T phase 2D MoS2 nanosheets.

Abstract: Systems and methods for producing energy from a geothermal formation. A heat exchanger can be disposed within a well to absorb heat from a geothermal formation. The heat exchanger can be supported within the well using a high thermal conductivity material. The heat exchanger is connected to an organic Rankine cycle engine including a secondary heat exchanger and a turbine. The primary and secondary heat transfer fluids are chosen to maximize efficiency of the organic Rankine cycle.

Abstract: A transmission pump comprising a pair of pistons located in corresponding chambers of the pump, the pistons configured to move fluid located in the chamber. The transmission pump also includes one or more return springs located in at least one of the chambers and configured to move the pair of pistons. The transmission pump also includes an electrical coil located adjacent the pair of pistons, wherein the coil is configured to produce a magnetic flux to move the pistons and springs.

Abstract: The present invention describes the improvements due to alternated actuation cycles to reduce the delivery errors related to the pumping chamber elasticity, the actuator relaxation or hysteresis. The method actuates a pumping device with an optimal driving voltage profile, wherein the pumping device comprises a pumping chamber including a pumping membrane and a voltage controlled actuator connected to said membrane; the movement of said membrane being defined by three positions, namely a rest, a bottom and a top position. The method includes the actuation of the membrane with a pumping pattern including at least two different cycles: Cycle A: rest-bottom-rest-top-rest Cycle B: rest-top-rest-bottom-rest. The invention also relates to a device to carry out the method.

Abstract: The present invention provides a bicycle tool storage device mountable in a bicycle headset assembly and/or a bicycle pump. A top cap for loading a headset assembly and mounting the device is also provided. The top cap includes an annular body and a device receiving aperture extending through the body. The top cap includes a flange extending radially outwardly from a first end of the body and a ridge defined in an inner surface of the body adjacent to the flange. The ridge is concentrically aligned with the aperture for retaining the device. Further still, a bicycle pump for mounting the device is provided. The pump includes a pump body, a handle, a pump head, and a flange. The pump body houses a plunger and a piston. The plunger and handle define a cavity for receiving the device. The handle further defines a flange for retaining the device.

Abstract: A linear compressor includes a mover which linearly reciprocates, a stator generating a driving force to allow the mover to linearly reciprocate and having a cylinder space formed on an inner circumferential surface thereof, a cylinder inserted into the cylinder space of the stator and having a compression space compressing a refrigerant, a piston reciprocating in an axial direction inside the cylinder, a frame provided on one side of the stator in an axial direction and supporting the stator in the axial direction, and a cylinder support member separated from the frame, provided between an inner circumferential surface of the stator and an outer circumferential surface of the cylinder, having one end fixed to the stator and the other end fixed to the cylinder, and supporting the cylinder with respect to the stator in the axial direction.

Abstract: A reciprocating type compressor may include a crank shaft that is coupled to a rotor of a motor to receive a rotational force and a connecting rod that is coupled to a pin of the crank shaft and converts a rotational force of the crank shaft into a linear motion of a piston. The connecting rod may include a first end having a tubular body that includes a pin insertion hole into which the pin of the crank shaft is inserted and a socket that projects from the tubular body, a second end coupled with the piston, and a main body that extends between the first end and the second end and having a ball that is received inside of the socket.

Abstract: A lubricating oil supply apparatus may include a rotational portion that rotates together with a rotational shaft and a fixed portion that maintains a fixed location thereof and supplies oil through a space that circles with respect to a rotational center of the rotational portion, thereby supplying oil regardless of a rotational direction of the rotational shaft.

Abstract: The present disclosure pertains to systems and methods for a compressor assembly configured to operatively couple to motor stators having different dimensions in a reciprocating compressor. The compressor includes a cylinder, crankshaft housing, crankshaft, rod assembly, motor, and motor housing. The motor housing may operatively couple to an outer or inner surface of the crankshaft housing. The motor housing may include a pair of generally cylindrical shells, each with inner and outer sidewalls. The pair of shells may include a portion interposed there-between. The generally cylindrical shells may have different thicknesses, axial lengths, and/or radial lengths.

Abstract: A reciprocating type compressor includes a crank shaft that is coupled to a rotor of a motor to transfer a rotational force, a piston that compresses a refrigerant while linearly moving within a cylinder of a compression portion, a connecting rod that connects the crank shaft to the piston to convert a rotational force of the crank shaft into a linear motion of the piston, and a cylinder boss integral body in which the cylinder and a boss that encloses the crank shaft are integrally formed at right angles to each other.

Abstract: A reciprocating type compressor having a structure in which a rotational support of a rotational shaft and a cylinder are manufactured as separate components; a frame provided with the rotational support fixes the cylinder; and a cylinder head is fixed to the frame to cover the cylinder.

Abstract: A drive system for a pump includes a housing, first and second fluid displacement members, a solenoid disposed within the housing, and a reciprocating member configured to be driven by the solenoid. The reciprocating member is connected to the first and second fluid displacement members and is configured to mechanically displace the first and second fluid displacement members.

Abstract: The present invention relates to diaphragm pump (1) having a delivery chamber (3) and a working chamber (5), wherein the working chamber can be or is filled with a hydraulic fluid and is operatively connected to a pressure generating device in order to apply an oscillating pressure to the hydraulic fluid, further comprising a diaphragm (11) having at least one diaphragm layer (13) and a diaphragm core (15), which separates the delivery chamber (3) and the working chamber (5) from each other, wherein the diaphragm (11) is or can be operatively connected to a diaphragm return device (17) comprising a pull rod (19), which applies or can apply a return force on the diaphragm (11) in the direction of the suction stroke position, and further comprising a storage chamber (21) for holding the hydraulic fluid, and wherein the working chamber (5) and the storage chamber (21) are connected to each other by means of a return flow channel (25) closed by means of a closure element (23, 23?), and wherein the closure element

Abstract: A sealed connection device configured to connect a pump head with a pump on an additive pump. The sealed connection device may comprise an adapter and a sealing collar that inserts into the adapter. The sealing collar may comprise a body with a bore forming open ends, a shoulder disposed between the open ends, an annular detent adjacent the shoulder, annular grooves, one being disposed on the shoulder two others found on either side of the shoulder, and o-rings disposed in the annular grooves. The pump may couple with a first side of the adapter, the pump comprising a shaft that inserts in the bore of the sealing collar. The pump head may insert into a second side of the adapter so as to contact one of o-rings on the sealing collar.

Abstract: A downhole motor-pump assembly disposed within a tubular string includes a rotor and a stator. The rotor has a first rotor portion and a second rotor portion. The first rotor portion has a first geometrical shape and the second rotor portion has a second geometrical shape. The first geometrical shape differs from the second geometrical shape. The stator has a first stator section and a second stator section. The first stator section is spaced from the second stator section by a gapped region. The first rotor portion is located within the first stator section and the second rotor potion is located within the second stator section. The differing geometry causes a difference in displacement in the first and second sections per revolution of the rotor. Therefore the difference in displacement must be made up and is induced into the tool at the gap or drillings between sections, and this additional volume is effectively pumped.