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: Systems and methods for specifying one or more operational parameters for a pumping system are disclosed. A first suction pressure loss profile for a first pump in a pumping system is determined. A second suction pressure loss profile for a second pump in the pumping system is determined. The first suction pressure loss profile is compared with the second suction pressure loss profile. One or more operational parameters are specified based, at least in part, on the comparison.

Abstract: A pressure differential motor control system for controlling a motor of a high volume low pressure (HVLP) spray system via a pressure differential. The pressure differential motor control system has an outlet fitting connected to a turbine assembly, and a pressure switch adapted to be activated by a pressure differential from the outlet fitting. The outlet fitting has a first section connected to the turbine assembly, a mid section featuring low and high pressure ports, a second section connected to a quick coupler hose and spray gun, and a venturi defined through the outlet fitting. The low pressure port is in communication with the venturi, and the high pressure port is in communication with the input side of the outlet fitting. The pressure switch is activated by a pressure differential from the low and high pressure ports of the outlet fitting, thereby sending a signal to a motor controller for controlling a motor of the turbine assembly.

Abstract: An automatic deactivation mechanism is configured for an air bladder pump having a casing and a motor located therein to pump air into an air bladder from the atmosphere and through an air valve connected through the casing. The automatic deactivation mechanism includes a housing positioned within the casing and has defined therethrough a first aperture in fluid communication with the atmosphere through the casing and a second aperture in fluid communication with the air bladder through the casing. Included within the housing are at least two switches and a diaphragm positioned between the switches. The housing is sealed so that when a threshold pressure is reached therein, at least one switch is triggered by deflection of the diaphragm to automatically deactivate the pump by de-energizing the motor.

Abstract: An apparatus for generating a current in a pool, the apparatus including: a) a shell including an upwardly extending intake chamber in fluid communication with the pool, the intake chamber having a liquid intake zone located in a lower end of the intake chamber; b) an axial pump having an upstream suction-side and a downstream discharge-side, the pump located at an upper end of the intake chamber, the pump having a guide means arranged to direct liquid to flow longitudinally in the discharge-side channel substantially without swirling, the guide means being located downstream of the pumping element; and c) drive means adapted to drive the drive shaft, wherein driving the drive shaft produces a discharge of liquid through the discharge-side outlet, to create a current in the pool for a swimmer to swim against.

Abstract: An infusion device comprises a pusher for a plunger of a syringe containing a liquid to be infused. A load cell measures the push force. An encoder associated to a motor commanding the pusher measures the displacement of the pusher. A controller signals an alarm when the ratio between the variation of the push force and the displacement exceeds a predetermined threshold. The device, which serves for infusing an anticoagulant into an extracorporeal blood circuit in a dialysis apparatus, is able to signal an onset of an anomalous situation of lack of infusion in good time.

Abstract: An anti-dry start device is provided for preventing the operation of a powered pressure washer in the absence of sufficient inlet fluid pressure, the device comprising a pressure switch removably mounted into a fitting installed in the inlet line to the pressure washer, the device further comprising an electrical interconnection between the pressure switch and an ignition system of the pressure washer, whereby the pressure switch is adapted to disrupt power to the pressure washer ignition switch when the inlet pressure is below a preset threshold.

Abstract: An electronic control system is disclosed to control and to prevent damage to a standalone or a network of oil free, two stage compressor packages. The electronic control system uses pressure and temperature sensors to detect actual shutdown conditions or predict shutdown conditions based on the operating state of the compressor package and the current temperatures or pressures of the air at strategic locations in the compressor package. It has been determined through experimentation that, if the pressure at the inlet of the stage two compressor is less than the discharge pressure of the stage two compressor by more than an allowable value, then a high temperature condition will occur in the stage two compressor and cause the compressor to seize.

Abstract: A controller for managing a plurality of compressors in an efficient manner such that the system uses less energy, has lower maintenance cost and experiences less wear. For a system with multiple compressors the controller has the minimum number of compressors needed to maintain the pressure on at any given time and has no more than one compressor running in an unloaded condition for maximum efficiency. The system can quickly pressure up or down in conjunction with the needs of the system. The controller rotates the order of use of the compressors to spread the time of use and for limiting the number of times during an hour that each compressor can be turned on such that the compressors take turns running and turning on and off for even wear. The system seldom uses more than one compressor unloaded at any time.