Abstract: According to one embodiment of the present invention, a system for pumping fluid is provided. According to this embodiment, a fluid pumping system comprises a fluid inlet pipe and a fluid outlet pipe. A plurality of pump units are disposed between the inlet and outlet pipes such that the pump units each pump fluid out of the inlet pipe and into the outlet pipe. The pump units each include at least one DC motor. A solar panel may be used to power the pump units.

Abstract: A piston is slidably provided in a cylinder and partitions a first pump chamber, and a second pump chamber connected to an object to be operated. A first on-off valve is provided between the first pump chamber and the outside. A second on-off valve is provided in a connecting flow passage that connects the first pump chamber and the second pump chamber to each other. When the piston is moved forward by an electromagnetic force of a solenoid portion, a capacity of the first pump chamber decreases, and a capacity of the second pump chamber increases. When the piston is moved backward by a biasing force of a spring, the capacity of the first pump chamber increases, and the capacity of the second pump chamber decreases. A pressure receiving area of the front face of the piston is larger than that of the back face thereof.

Abstract: A method for operating a fuel pump is provided. The method may include decreasing a pump chamber pressure, passively opening a metering valve coupled to a pump chamber in response to the decreasing, and while the metering valve is open, generating a rotational output via a motor, transferring the rotational output into an actuation force applied to the metering valve via a metering valve actuation device, and inhibiting the metering valve from closing via sustaining application of the actuation force.

Abstract: The present invention eliminates a valve holder and accommodates a valve guide in a small space provided between a valve seat and a peripheral surface part of a pressure chamber to reduce the size of a pump. The valve guide guides a stroke of the valve and is provided inside the valve seat. The valve includes an annular abutting surface that abuts a valve seat formed in a valve housing to shut off a fuel intake passage and a bottomed cylindrical part is provided at an inner peripheral part of the annular abutting surface. The bottomed cylindrical part is inserted into a fuel introduction hole formed in the valve housing inside the valve seat. A member having a cylindrical surface part that supports a reciprocating motion of the valve, is fixed to the valve housing, face-to-face with an inner peripheral part of the bottomed cylindrical part.

Abstract: A pressure-controlling appliance for an inflatable product has a inflatable body, a pump mounted in the inflatable body, a pump switch and an inflation-deflation valve. The pump inflates or deflates the inflatable bodythrough the inflation-deflation valve. The pressure-controlling appliance also comprises an inflation-deflation controlling mechanism and a pressure-controlling mechanism. The inflation-deflation controlling mechanism is applied to open and close the inflation-deflation valve and to turn the pump switch on or off. The pressure-controlling mechanism operates the inflation-deflation controlling mechanism according to the pressure in the inflatable body that compared with the high or low reference pressure.

Abstract: A control signal output unit obtains a motor control signal by applying a reduction amount for a current command value obtained by an over-power suppression control unit to a current command value from a host control unit. The over-power suppression control unit includes a hydraulic pressure estimation unit that estimates hydraulic pressure, and a current command value correction amount calculation unit that compares a target hydraulic pressure with an estimated hydraulic pressure and outputs the reduction amount for the current command value. Load information indicating whether a load on the pump is a low load or a high load that is higher than the low load is input into a control circuit from the host control unit, and the over-power suppression control unit changes the target hydraulic pressure in accordance with a magnitude of the load indicated by the load information.

Abstract: The present invention relates to a versatile manually-actuated barrel style pump also capable of controllably dispensing a compressed gas cartridge. The current invention addresses the shortcomings of the prior art dual function pumps available providing the user with a more versatile dual function barrel pump integrated with a compressed gas cartridge dispenser as well as addresses the deficiencies from the prior art dual function pumps. Compressed gas cartridge storage methods that incorporate with the pump and user ergonomics and increased user safety will also become evident.

Abstract: In a method of operating a fluid-working machine, the volume of working fluid displaced during each cycle of working chamber volume is selected taking into account the availability of other working chambers. The status of each working chamber is monitored and a working chamber treated as unavailable if it is found to be malfunctioning. A working chamber may be treated as unavailable if it is allocated to an alternative working function. A fault may be detected in a working chamber by determining whether a measured output parameter of the fluid working machine fulfills at least one acceptable function criterion taking into account the previously selected net displacement of working fluid by a working chamber during a cycle of working chamber volume to carry out the working function.

Abstract: A blower configured to be positioned in confined spaces and to provide ventilation of a fluid, such as temperature controlled air, is disclosed. In various embodiments, the blower is configured to have a reduced axial thickness, which can be desired in such confined spaces. In some embodiments, the blower has an integral filter, a wire channel for the routing of one or more wires, and/or an exposed backplate. In some embodiments, the blower has a snap-fit circuit board, containment system for mounting the motor, one or more vanes for directing fluid flow, shrouded impeller, and/or integrated connector.

Abstract: A submersible pump system includes a submersible pump assembly having one or more stages of impellers and a submersible motor assembly that drives the pump assembly. The submersible pump assembly includes a motor housing, a motor within the motor housing for driving the pump assembly and a control module mounted to the motor housing for operating the motor. The control module is electrically connected to a power line and comprises a controller and a variable frequency drive driven by the controller. The controller operates the variable frequency drive to drive the motor to maintain a constant pressure output condition from the pump assembly.

Abstract: A double diaphragm pump for moving large volumes of water that may be laden with debris includes a pair of fourteen-inch diameter elastomeric diaphragms, driven by reciprocating push rods pivotally coupled to opposed eccentrics. An engine drives a gearbox having two outputs. One eccentric is attached to each output. A pair of weighted flap valves control flow to and from each diaphragm chamber. A vacuum pressure gauge monitors inlet pressure. A relief valve relieves vacuum pressure in the event of a blockage or other flow impediment.

Abstract: The present application relates generally to pumps, and more particularly to piston type pumps having increased energy efficiency, systems incorporating such piston type pumps, and methods of operating piston type pumps.

Abstract: The presence or absence of boost pressure is determined from an error between F-P characteristics showing the relationship between the output frequency of an inverter and the power consumption and an actual operating point. When there is boost pressure, an amount of correction of linearized characteristics showing the relationship between quantity and discharge side pressure is automatically calculated based on the error, and the linearized characteristics are corrected. Subsequently, by carrying out a PID control in accordance with a target pressure obtained from post-correction linearized characteristics, the output frequency of an inverter unit is controlled, and an estimated constant end pressure control is carried out. Because of this, a pressure sensor or quantity sensor on a pump intake side is rendered unnecessary, and a simplification and reduction in cost of a feed water pump control device are possible.

Abstract: A high-pressure pump has: a plunger; a pump body; a cover member for covering the pump body and forming a fuel chamber; a pulsation damper body constructed of upper and lower diaphragms with their peripheral edge portions joined and for reducing pressure pulsation in the chamber, the upper and lower diaphragms trapping gas having a given pressure between them; an upper support member having an upper ring-shaped part and an upper support body, the upper ring-shaped part being joined to the peripheral edge portion of the upper diaphragm, the upper support body extending from the upper ring-shaped part and abutting on the cover member; and a lower support member having a lower ring-shaped part and a lower support body, the lower ring-shaped part being joined to the peripheral edge portion of the lower diaphragm, the lower support body extending from the lower ring-shaped part and abutting on the pump body.

Abstract: A hose cartridge for removably mounting a hose on a peristaltic pump has a roller wheel for pumping a fluid through the hose in a closed loop encircling an opening through which the roller wheel extends when the hose cartridge is mounted. A method for mounting such a hose cartridge includes introducing a holding rod of the pump into a holding portion of the hose cartridge, and carrying out a rotational movement of the hose cartridge about an axis defined by the holding rod until the working position of the hose cartridge is reached. The holding rod and the fixing bar both thus extend substantially parallel to the rotation axis of the roller wheel.

Abstract: A method of suppressing a pulsation of axial type hydraulic pump/motor includes performing a pressure accumulation operation in which each of ports of each of two pressure accumulation oil passages exclusively communicates with a corresponding one of communication holes and pressure inside one of the cylinder bores is accumulated in a corresponding one of the pressure accumulation oil passages through the communication hole in two levels, the communication holes being provided for each of the cylinder bores to communicate with inside of each of the cylinder bores and having opening portions sliding on the respective ports with rotation of the cylinder block to communicate with the respective ports; and performing an accumulated pressure collection operation in which the pressure accumulated in the pressure accumulation oil passage is collected in one of the cylinder bores in two levels.

Abstract: Inventive methods and apparatus for automated control of a pump utilized to draw liquid from a fluid reservoir. Certain aspects relate to one or more components of an oil well pump control system. Other aspects relate to methods for automated control of a pump utilized to draw oil from an oil well.

Abstract: A miniature pump includes a driving unit and an airflow control unit, which includes a bladder supporter, a compression unit, a valve base and an output valve. The compression unit has multiple intake valves and multiple bladders, each intake valve covers the corresponding intake through hole, each intake through hole is surrounded by a circular wall, wherein the circular wall is disposed on a bottom surface of the corresponding intake valve or a top surface of the corresponding bladder supporter. The valve base is arranged over the compression unit, and the valve base has multiple output through holes aligned with the bladders respectively. When the bladder is compressed, air inside the bladder is output via the output through hole and the output valve. When the bladder is decompressed, external air is introduced into the bladder via the intake through hole and the intake valve.

Abstract: A piston 10 for an engine has a number of elongate pockets 21, 22, 23, 24 each of which is arranged at an angle relative to a longitudinal axis HP2 of a contact zone 15 on the thrust and anti-thrust sides of the piston 10. The pockets 21, 22, 23, 24 are arranged in two columns C1, C2 one on each longitudinal side of a central portion 20 of the contact zone 15 to form partial barriers to reduce the loss of oil from the central portion 20 during use of the piston 10. The pockets 21, 22, 23, 24 are oriented differently above and below a transverse axis HP1 of the contact zone 15 so as to reduce the loss of oil irrespective of the direction of motion of the piston 10.

Abstract: Compressors having at least two compressor stages, a compressor discharge a first recycle flow path wherein the first recycle flow path connects the first compressor stage inlet feed and the compressor discharge, a second recycle flow path wherein the second recycle flow path connects the second compressor stage inlet feed and the compressor discharge, measurement devices sufficient to quantify a volumetric flow rate of the first compressor stage inlet feed, and a controller arranged and configured to accept a set of inputs, wherein the set of inputs comprises information sufficient to determine the work imparted by the first compressor stage, wherein the set of inputs is sufficient to quantify a volumetric flow rate of the second compressor stage inlet feed are described herein. Compressors having differing numbers of stages and the control of those compressors are also described.