Abstract: A water pump includes: a lower casing; a shaft fixed to the center of the lower casing; a stator disposed in the lower casing; an outer rotor that is arranged at a predetermined gap to the outer circumferential surface of the stator and is rotatably supported on the fixed shaft; an upper casing that is sealably mounted on an upper side of the lower casing in which an inlet and an outlet are formed; an impeller that is disposed in the upper casing and that is rotatably supported on the fixed shaft; and a power transmission unit that is installed between the impeller and the rotor and transmits the rotational force of the rotor to the impeller by a magnetic force, to prevent water from being introduced into the lower casing, and to allow the fixed shaft to rotatably support the rotor, as well as to rotatably support the impeller.

Abstract: A device for attaching personal air cooling visor clip-on with a cooling 40×40×10 mm-5 volt battery pack/computer powered fan to cap or other head gear. The rigid rectangle plastic clip-on strap has holding cap clams, cable holding posts, 40×40×10 mm-5 volt fan, fan cable, fan cover, cable holding channel, usb wire and cable, fan cover tabs and fan tabs slots on the clip-on strap. The 40×40×10 mm-5 volt battery pack/computer powered fan is partially embedded into the plastic clip-on strap and secured by a fan cover using tabs with the connected fan and usb cables locking into and secured by channel holding posts in a channel. The strap is pushed onto a cap or headgear with the clams holding on top of the left and right top ends of the cap brim.

Abstract: A fan rotation speed controlling device includes a first transistor, a second transistor, a third transistor, a fourth transistor, and at least one heat dissipation fan. The first transistor receives a pulse-width modulation (PWM) signal. The second transistor and the third transistor amplify the PWM signal. The fourth transistor receives the amplified PWM signal and changes its own working state according to the amplified PWM thereby controlling the magnitude of an output voltage. Consequently, the heat dissipation fan changes its rotation speed according to variation of the output voltage. The fan rotation speed controlling device is applicable to and can control the rotation speeds of a plurality of electrically connected fans which are of different specifications.

Abstract: Disclosed is a reciprocating compressor. A cylinder in which a piston makes a reciprocal movement is insertedly coupled to a cylinder part of a frame which fixes a stator of a reciprocating motor, and a collision preventing portion is formed in the cylinder to allow a piston connection portion to collide therewith. Thus, although the piston connection portion overstrokes, the piston connection portion prevent collision force from being transferred to the frame having the cylinder part, whereby a laminated state of the stator can be prevented from being distorted to prevent a degradation of efficiency of the motor, and thus, reliability and performance of the compressor can be enhanced.

Abstract: Pulses in a pumping system resulting from paired reciprocating pumps are dampened by a pressure vessel that includes two compartments separated by a flexible membrane and otherwise isolated from each other.

Abstract: Example devices, systems, and methods disclosed herein relate to controlling operation of a fire pump or jockey pump of a fire pump system. An example fire pump control system may comprise a jockey pump controller configured to control operation of a jockey pump and a fire pump controller configured to control operation of a fire pump. The jockey pump controller may be configured to determine a first pressure value based on an output of a jockey pump pressure sensor. The fire pump controller may be configured to receive the first pressure value from the jockey pump controller. The fire pump controller may also be configured to determine a second pressure value based on an output of a fire pump pressure sensor and select a predetermined action based on a comparison of the first pressure value and the second pressure value. Additional example devices, systems, and methods are described herein.

Abstract: A centrifugal blower includes a centrifugal fan; an electric motor that rotationally drives the centrifugal fan; a fan case that has an air inlet and an air outlet and that internally accommodates the centrifugal fan; and an electric motor case (8) that has a cylinder (6) accommodating the electric motor and a flange portion (7) extending radially outward from the cylinder (6) and that is fitted to the fan case. The flange portion (7) is provided with a ring-shaped rib portion (20) that protrudes from the flange portion (7); the ring-shaped rib portion (20) is provided with a plurality of slits (22a and 22b) that extend from the flange portion (7) in the axial direction of the cylinder (6); and the flange portion (7) between the ring-shaped rib portion (20) and the cylinder (6) is inclined in a circumferential direction toward the slits (22a and 22b).

Abstract: An electric fluid pump includes: a case including a recess portion into which a fluid flows; a rotor arranged in the recess portion; an axial member supporting the rotor; and a flange member insert-molded with the case and the axial member, secured to an end portion of the axial member, and buried in a bottom wall portion of the recess portion, wherein the flange member includes: a first flange portion; a reduced portion closer to an inner surface of the bottom wall portion than the first flange portion, and smaller than the first flange portion in a radial direction; and a second flange portion closer to the inner surface than the reduced portion, larger than the first flange portion in the radial direction, and partially exposed from the inner surface, and the inner surface is flat.

Abstract: This invention provides a diaphragm pump that decreases the number of components or improves workability in assembling. A crank (4) to which the output shaft (2a) of a motor (2) is pivotally attached has, in its upper surface, a ring-shaped insertion groove (5) with respect to the output shaft (2a) as the center. A projecting driving shaft (9b) is formed integrally with a driver (7). When the lower end (9c) of the driving shaft (9b) is inserted into the insertion groove (5), the axis (9d) tilts. When the crank (4) rotates, an engaging portion provided in the insertion groove (5) engages with the lower end (9c). The driving shaft (9b) rotates while changing the tilt direction of the axis (9d) following the rotation of the crank (4). Hence, when a diaphragm portion (12a) attached to the drive element (7a) of the driver (7) moves upward/downward, a pump chamber (18) expands/contracts so that a pump action is obtained.

Abstract: Methods and systems for operating a fire pump controller are provided. An example method includes causing a power supply coupled to a an electric motor-driven water pump through a fire pump controller in a fire protection system to provide power to the water pump, and monitoring the performance of the power supply during the motor starting period by measuring the voltage and/or current of its output under motor load conditions. The method may also include providing visual indications, such as traces or starting signatures of motor power supply voltages and/or currents during the motor starting period for the purposes of observation and troubleshooting motor power supply and power train performance problems.

Abstract: An electric pump unit for a transmission, which supplies a hydraulic pressure to the transmission, includes: a pump which takes in and discharges oil; and a pump driving electric motor including a motor shaft connected to the pump, a motor rotor fixedly provided on the motor shaft, and a motor stator disposed around a circumference of the motor rotor. The pump and the electric motor are integrated with a lid that tightly closes an opening in a recess portion which is formed on a transmission housing of the transmission and into which the oil is introduced, and are accommodated within the recess portion.

Abstract: The invention relates to a control method implemented in a processing unit (UC) used in the control of a multipump system, said multipump system comprising an inlet passage (IN) intended to receive a fluid, two pumps (P1, P2) connected in parallel to said inlet passage and an outlet passage connected to the outlets of the two pumps (P1, P2), at least one of the two pumps being controlled by a variable speed drive (VSD), each pump (P1, P2) being defined by a first characteristic curve (HQcurve_n), flow rate-manometric head at maximum speed, and by a second characteristic curve (PQcurve_n), flow rate-received power. The control method provides for determining the total flow rate (Qtotal) of the multipump system without using sensors such as flowmeters.

Abstract: A lid apparatus for a medical device for extracorporeal blood treatment that includes a lid which is hinged by means of at least one pivot joint at the medical device is disclosed. The pivot joint includes thereby a first joint section which may be positioned at the lid, and a second joint section which may be connectable to the medical device, wherein the joint sections are pivotable about a pivot axis at least between a first position, in which the lid is open, and a second position, in which the lid covers at least a part of the medical device, wherein also the joint sections are latchable in at least one pivoting position.

Abstract: A dual chamber discharge muffler for a compressor. The dual chambers of the discharge muffler are separated by a check valve that closes upon shutdown of the compressor, which in turn limits the amount of exhaust gases in the discharge muffler that are able to return to the compressor. The dual chambers are formed by dividing a muffler housing with a dividing plate. The dividing plate may also be adapted to receive a fastener that through mounts the muffler to the compressor.

Abstract: An improved manifold and valve cartridges suitable for high power (over 600 hp) reciprocating pumps for water blast or jet applications are disclosed. In one aspect, the disclosed valve cartridges are compact and mounted axially along a seat member that has a central bore in addition to suction and discharge seats. The seat member can also be provided a plurality of radially arranged bores for allowing suction flow to the pump. A spool valve assembly can be mounted through the seat member bore, and can include a valve spool, a spherical suction valve member, a compression spring, and compression-locked rings. The spool valve can include a closed flanged end that engages with the seat member discharge seat. In operation, the compression spring continuously pushes the spool valve closed flanged end against the discharge seat and pushes the suction valve member against the suction seat to retain a normally closed position.

Abstract: A turbomachine passage cleaning system includes a first airflow passage having a first inlet configured and disposed to fluidly connect to a compressor portion, a first outlet configured and disposed to fluidly connect to a turbine portion, and a first intermediate portion including a first strainer. A second airflow passage is fluidly coupled to the first airflow passage. The second airflow passage has a second intermediate portion having second strainer. A first valve is arranged in the first intermediate portion upstream from the first strainer, and a second valve is arranged in the second intermediate portion upstream from the second strainer. The first and second valves are selectively operated to control fluid flow into respective ones of the first and second airflow passages to filter air passing from a turbomachine compressor portion to a turbomachine turbine portion.

Abstract: A method and apparatus for a pump control system. One or more embodiments of the invention include a pump controller that can perform a self-calibrating procedure, can provide precise motor speed control, can provide a limp mode before shutting down the motor when system parameters are exceeded and/or fault conditions occur, can detect fault conditions, and can store fault conditions for later retrieval.

Abstract: A piston pump is provided comprising a cylinder with an inner cylinder wall and a working space. The piston pump includes a piston inside the cylinder and has a piston head with a first and second projections extending from its lateral surface to the cylinder wall. These first and second projections enclose a cavity between the piston head and the cylinder wall. The piston head also includes a channel for routing a flushing fluid to the cavity. The first and second projections are configured to promote flow of the flushing fluid out of the cavity and into the working space of the cylinder.

Abstract: An integrated fluid management system is provided with capability to deliver precise flow rate and fluid dosing capability over a wide range of operator set parameters. A magnetically actuated pump head is low cost, affords simple installation, and may be disposable. Multiple pump heads may be docked to a single drive module or control module to provide concurrent metering of multiple fluids and to maintain precise volume ratio of the multiple fluids to one another. The magnetic pump head may be integrated with radio frequency Identification devices (RFID) and Hall Effect Sensors to provide customized control and fail safe operation.

Abstract: The disclosure describes systems and methods relating generally to filtration. Even more particularly, this disclosure relates to controlling the operation of a pump using filter information. A removable filter can include an electronically readable tag storing filter information. The filter information can be read by a tag reader and rules applied to the filter information to determine whether or how to operate a pump.