Abstract: A pressure boosting system and a method of using the same to increase fluid pressure in a fluid distribution system are disclosed. The pressure boosting system may be installed “in-line” with the fluid distribution system.

Abstract: A wastewater sump assembly for receiving and disposing of undesired fluid and, in some cases, solid waste is disclosed. A sump basin formed from a base, an upstanding wall and a top which are all defined from a single, integral, monolithic material may be employed. The top of the monolithic basin includes a pump access aperture sized to allow passage of a submersible pump. Pipe stubs are provided in a recessed area of the top to allow for easy connection to outlet and vent piping. Interchangeable switches of differing types, e.g. a diaphragm switch and a float switch can be utilized with the sump basin. Certain switch subassemblies include a handle to facilitate easy removal. The handle may also be utilized to hold a cord seal in place atop the sump. A diaphragm switch in accordance with the present disclosure may be positioned externally of the sump.

Abstract: A motor drive and a discrete power component assembly. The motor drive has a motherboard; a controller; a heat sink; and a discrete power component assembly mounted to the motherboard, the discrete power component assembly includes two discrete power components, a motherboard facing plate intermediate the motherboard and the two discrete power components, the motherboard facing plate adjacent planar surfaces of the two discrete power components, and a heat sink facing plate adjacent planar surfaces of the two discrete power components which are opposite the planar surfaces adjacent the motherboard facing plate. The heat sink is secured to the motherboard with the discrete power component assembly therebetween.

Abstract: A pressure boosting system and a method of using the same to increase fluid pressure in a fluid distribution system are disclosed. The pressure boosting system may be installed “in-line” with the fluid distribution system. The pressure boosting system includes a submersible pump and a controller that may be configured to control the submersible pump based on an outlet pressure if inlet pressure is below a threshold. The pressure boosting system may also control the submersible pump based on a flow of the fluid through a pump unit as a function of the inlet pressure. A mounting bracket may be moveably coupled to a tank of the pressure boosting system.

Abstract: A pumping system and method for operating a pumping system including a motor coupled to a variable speed drive to drive a pump. A torque indicator corresponding to the torque presented to the drive is determined. The torque indicator may be used to detect a fault if it exceeds a baseline torque, or to detect a defective transducer, or to detect a system change by perturbing one parameter and comparing another to a predicted value.

Abstract: A pressure boosting system and a method of using the same to increase fluid pressure in a fluid distribution system are disclosed. The pressure boosting system may be installed “in-line” with the fluid distribution system.

Abstract: This disclosure relates to a control system for driving a motor. The motor may include a cut-out circuit. The control system may include a buck-boost circuit to limit the rate of change of an output voltage before the output voltage is applied to operate the motor.

Abstract: A portable fluid pump including a frame; a first fuel reservoir having a first upper boundary; a second fuel reservoir having a second upper boundary; an engine disposed laterally between the first and second fuel reservoirs; and a pump disposed laterally between the first and second reservoirs. The pump includes an intake pipe having a central axis; the central axis passing through a first point that is located less than two inches above the first upper boundary.

Abstract: Systems and methods for condensate removal are disclosed. A reservoir may include a trap structure and a sediment trap may be disposed within the trap structure. The sediment trap may be positioned within the reservoir so that condensate flowing into the reservoir is filtered before flowing out of the reservoir.

Abstract: This disclosure relates to a variable speed drive for driving a motor having a starting circuit. The variable speed drive adaptively generates motor voltages to reduce the likelihood of starting circuit intrusions.

Abstract: A solenoid pump for moving a fluid is disclosed. The pump includes a solenoid coil that generates an electromagnetic field for moving a plunger relative to a stationary core. Magnetic components of the solenoid pump direct the electromagnetic field to provide a substantially balanced magnetic force on the plunger.

Abstract: This disclosure relates to a variable speed drive for driving a single phase motor. The variable speed drive generates enhanced motor voltages including harmonic components configured to reduce torque pulsations.

Abstract: This disclosure relates to a variable speed drive for driving a motor having a starting circuit. The variable speed drive adaptively generates motor voltages to reduce the likelihood of starting circuit intrusions.

Abstract: This disclosure relates to a control system for driving a motor. The motor may include a cut-out circuit. The control system may include a buck-boost circuit to limit the rate of change of an output voltage before the output voltage is applied to operate the motor.

Abstract: A submersible pump, and method of making the submersible pump, is disclosed. The pump comprises a housing, a plurality of impeller stages serially disposed in the housing from a bottom impeller stage to a top impeller stage, an impeller bypass hole extending through one of the impeller stages and a housing bypass hole extending through the housing radially outwardly from one of the impeller stages.

Abstract: Circuits and methods are disclosed for suppressing arcing occurring in switch contacts that includes a triggerable electronic switch in parallel with a series connection of relay switches. The trigger electrode of the triggerable electronic switch is connected to a node between the series connected relay switches, which allows the electronic switch to be turned on to a conducting state when a voltage difference occurs between the node and either of the opposite ends of the switches. The voltage difference arises because of arcing that occurs when the relay switches bounce, typically during opening and closing of the relay switches. The opposite ends of the switches are connected to conduction terminals of the electronic switch, where the electronic switch carries substantially all of the current supplied to a load for a half-cycle or less of an AC current cycle when arcing occurs in the relay switches, thereby bypassing the relay switches and suppressing arcing therein.

Abstract: A press tool for forming a compressible mass into an annulus of given inner and outer diameters and axial length, the tool having radially movable outer and inner tool parts adapted to expand and contract, respectively, to form the mass to the desired inner and outer diameters. An axially movable annular member includes a working face for forming the compressible mass to the desired axial length. Each of the tool parts include a first array of radially movable members, each formed with a head having a working face curved to the desired diameter and a second interposed array of radially movable members also having a head having a working face. A central portion of the working face is curved to the desired diameter and opposed sloping outer portions are shaped for sliding against rear-faces of the heads of respective adjacent members of the first array.

Abstract: An electric motor of the type used to power submersible pumps is disclosed. An interior cavity of the motor is filled with one or more liquids for cooling and/or lubricating the motor interior. A system for circulating the fill liquid within the motor cavity comprising a rotatable cup spacer attached to the motor shaft and liquid passageways is described.