Pump subsystem for fluid delivery (e.g., in a wearable patch pump) comprises a fluid chamber with pumping motion and a valve shaft assembly with valving motion, both being driven by the same drive mechanism. Fluid chamber has variable volume chamber provided by a piston driven by the drive mechanism and translated relative to a plug in the pump housing. Piston extends the fluid chamber during an intake stroke and retracts the fluid chamber during a discharge stroke. Valve assembly has at least one valve shaft controllably translated by the drive mechanism to selectively align a first throughway with an opening in the pump chamber and a fluid intake port for an intake stroke to draw fluid into the fluid chamber, and align a second throughway with the opening in the pump hamber and a fluid discharge port for an discharge stroke to discharge fluid from the fluid chamber.

Embodiments provide functionality to control real-world mechanical systems through the creation and deployment of machine learning models. An embodiment creates the machine learning model by extracting (i) an indication of efficiency and (ii) values of operational characteristics of one or more devices from one or more characteristic curves. Each characteristic curve corresponds to a respective device of one or more devices, in a mechanical system, functioning at a given speed. A training data set is created by determining efficiency and values of the operational characteristics for the mechanical system functioning with multiple combinations of the one or more devices operating at each of a plurality of speeds using the extracted indication of efficiency and extracted values of the operational characteristics. In turn, the machine learning model is trained with the created training dataset. Training configures the machine learning model to predict efficiency of the mechanical system based on operating data.

A wave-powered floating water pump apparatus comprises a housing operatively connected to a piston capable of reciprocating therein, and an exterior float. The housing interior defines a compression chamber including a compression chamber back valve. The compression chamber back valve opens when the apparatus descends in the ocean, and closes when the float lifts the apparatus. The piston comprises a piston shaft with a piston back valve therein, constructed and arranged to permit water which enters the piston shaft in response to water pressure from the compression chamber only to exit the top of the piston shaft at a higher elevation. A floating generator system for harnessing energy from ocean waves to produce usable electrical energy may include the pump, a water storage reservoir and a hydro-turbine. A system for purifying and desalinating water may include the pump, a semi-permeable membrane for reverse osmosis and a reservoir for purified water.

A wave-powered floating water pump apparatus comprises a housing operatively connected to a piston capable of reciprocating therein, and an exterior float. The housing interior defines a compression chamber including a compression chamber back valve. The compression chamber back valve opens when the apparatus descends in the ocean, and closes when the float lifts the apparatus. The piston comprises a piston shaft with a piston back valve therein, constructed and arranged to permit water which enters the piston shaft in response to water pressure from the compression chamber only to exit the top of the piston shaft at a higher elevation. A floating generator system for harnessing energy from ocean waves to produce usable electrical energy may include the pump, a water storage reservoir and a hydro-turbine. A system for purifying and desalinating water may include the pump, a semi-permeable membrane for reverse osmosis and a reservoir for purified water.

Pump assemblies may include a pumping unit. The pumping unit may include at least one impeller having an impeller housing with an impeller housing intake end, an impeller housing outlet end and an impeller housing interior extending from the impeller housing intake end to the impeller housing outlet end. An impeller assembly may be disposed in the impeller housing interior of the impeller housing. The impeller assembly may include an impeller hub. At least one impeller screw blade may extend from the impeller hub. An impeller shaft may drivingly engage the impeller hub for rotation of the impeller assembly in the impeller housing interior. The impeller shaft may be configured for driving connection to the power unit. At least one diffuser may include a diffuser housing with a diffuser housing intake end disposed in fluid communication with the impeller housing outlet end of the impeller housing of the impeller, a diffuser housing outlet end and a diffuser housing interior extending from the diffuser housing intake end to the diffuser housing outlet end. A plurality of diffuser vanes may be disposed in the diffuser housing interior of the diffuser housing. At least one pump extension may include a pump extension housing with a pump extension housing intake end disposed in fluid communication with the diffuser housing outlet end of the diffuser housing, a pump extension housing outlet end and a pump extension housing interior extending from the pump extension housing intake end to the pump extension housing outlet end. Methods of pumping a liquid from an area to be drained to a discharge area are also disclosed.

The disclosure relates to a coating agent pump for conveying a coating agent in a coating installation, having a pump inlet, an inlet section, a pump outlet and an outlet section. The coating agent pump according to the disclosure additionally has an outlet-side circulation connection for discharging the coating agent into a circulation line that leads back to a paint supply. Furthermore, the disclosure comprises a corresponding coating installation and an associated operating method.

A system for monitoring flow conditions of fluid flowing from a product container through a solenoid pump. The system includes at least one solenoid pump comprising a solenoid coil, which, when energized, produces a stroke of the solenoid pump, at least one product container connected to the at least one solenoid pump wherein the at least one solenoid pump pumps fluid from the at least one product container during each stroke, at least one PWM controller configured to energize the at least one solenoid pump, at least one current sensor for sensing the current flow through the solenoid coil and producing an output of the sensed current flow, and a control logic subsystem for controlling the flow of fluids through the solenoid pump by commanding the PWM controller and for monitoring the current through the solenoid pump by receiving the output from the current sensor, wherein the control logic subsystem uses the measured current flow through the solenoid coil to determine whether the stroke of the solenoid pump is functional.

An accumulator for storing fluid that includes a shell that defines an interior volume of the accumulator. The shell includes at least one port for providing fluid to a fluid system. The accumulator also includes an accumulator shaft disposed in the interior volume and extending at least partially across the interior volume from a first interior surface of the shell along a longitudinal axis of the shell, e.g., a central axis. The accumulator includes a piston-plate disposed in the interior volume such that the piston-plate and a second interior surface of the shell define a chamber in the interior volume. The accumulator further includes a motor disposed in the interior volume. The accumulator is configured such that rotational movement of the motor translates to linear movement of the piston-plate along the accumulator shaft.

An accumulator for storing fluid that includes a shell that defines an interior volume of the accumulator. The shell includes at least one port for providing fluid to a fluid system. The accumulator also includes an accumulator shaft disposed in the interior volume and extending at least partially across the interior volume from a first interior surface of the shell along a longitudinal axis of the shell, e.g., a central axis. The accumulator includes a piston-plate disposed in the interior volume such that the piston-plate and a second interior surface of the shell define a chamber in the interior volume. The accumulator further includes a motor disposed in the interior volume. The accumulator is configured such that rotational movement of the motor translates to linear movement of the piston-plate along the accumulator shaft.

A lubricator package for intermittently delivering a lubricant to lubrication points on packing on a high-pressure reciprocating pump, a frac pump is described. A preferred package includes a large (e.g., 10 gallon) capacity reservoir; a three or five outlet pump; a common manifold receiving oil from the large capacity reservoir and supplying oil or grease to the pumps; a mounting stand supporting the large capacity reservoir and the five outlet pump; and an optional a control package providing low level monitoring of lubricant flow and controlling the pump providing a pump stroke counter or timer.