Abstract: A system for controlling and monitoring the chemical usage in a car wash systems that form an aqueous cleaning solution by diluting a cleaning chemical concentrate in a process water stream to form. Level sensors are mounted to the bulk containers containing the chemical concentrate to measure and track the usage of the chemical concentrates. The usage data is collected and used to adjust flow rate controllers controlling the dilution of the concentrate into the process water stream. The system can be integrated into continuous processes where the aqueous cleaning solution is dispensed immediately after production and batch processes where the cleaning solution is stored temporarily before being dispensed onto a vehicle.

Abstract: A chemical delivery system capable of handling a variety of concentrated chemicals in such a manner as to reduce the amount of service required to maintain the system. The system should be able to accurately and consistently deliver an appropriate quantity of concentrated chemicals as needed by the application where the system is utilized. Additionally, the system is configured such that the system occupies as little space as necessary.

Abstract: An expandable chemical delivery system sharing a common bulk fluid inlet and bulk fluid flow path to direct a bulk fluid through one or more selected chemical eductors. Each chemical eductor is slidably insertable into an eductor port on the manifold body such that rotation of the chemical eductor is not required for installation. After installation, the orientation of the chemical eductor can be rotatably adjusted so as to avoid interference with adjacent chemical eductors. Delivery of a bulk fluid to each chemical eductor is controlled via a corresponding valve assembly that selectively allows or blocks flow of the bulk fluid from the bulk fluid flow path to the corresponding chemical eductor. The manifold body can include a plurality of individual manifold bodies approximated with a coupling system to define the bulk fluid flow path. Alternatively, the manifold body can comprise a single fabricated body for high pressure operation.

Abstract: A system for controlling and monitoring the chemical usage in a car wash systems that form an aqueous cleaning solution by diluting a cleaning chemical concentrate in a process water stream to form. Level sensors are mounted to the bulk containers containing the chemical concentrate to measure and track the usage of the chemical concentrates. The usage data is collected and used to adjust flow rate controllers controlling the dilution of the concentrate into the process water stream. The system can be integrated into continuous processes where the aqueous cleaning solution is dispensed immediately after production and batch processes where the cleaning solution is stored temporarily before being dispensed onto a vehicle.

Abstract: A chemical delivery system capable of handling a variety of concentrated chemicals in such a manner as to reduce the amount of service required to maintain the system. The system should be able to accurately and consistently deliver an appropriate quantity of concentrated chemicals as needed by the application where the system is utilized. Additionally, the system is configured such that the system occupies as little space as necessary.

Abstract: An expandable chemical delivery system sharing a common bulk fluid inlet and bulk fluid flow path to direct a bulk fluid through one or more selected chemical eductors. Each chemical eductor is slidably insertable into an eductor port on the manifold body such that rotation of the chemical eductor is not required for installation. After installation, the orientation of the chemical eductor can be rotatably adjusted so as to avoid interference with adjacent chemical eductors. Delivery of a bulk fluid to each chemical eductor is controlled via a corresponding valve assembly that selectively allows or blocks flow of the bulk fluid form the bulk fluid flow path to the corresponding chemical eductor. The manifold body can include a plurality of individual manifold bodies approximated with a coupling system to define the bulk fluid flow path. Alternatively, the manifold body can comprise a single fabricated body for high pressure operation.

Abstract: A power management circuit is arranged to apply power to and remove power from its own oscillator to conserve power. A power-on reset circuit provides a power-on-reset signal to a state machine. The state machine contains states that are programmed with information that is used to power up or down various subsystems within a device that includes the power management systems, including the oscillator of the state machine. The state machine assumes a known state and applies power to the oscillator in response to the power-on-reset signal. The state machine changes states in response to system events (e.g., a keypress). The state machine also maintains power to the oscillator during the period of time and which the state machine requires clock signal from the oscillator. The state machine can power down the oscillator to conserve power when the state machine does not require a clock signal from the oscillator.

Abstract: A high-pressure rotary nozzle includes a magnetic coupling for the purposes of driving a rotor body within the nozzle housing. The nozzle housing defines an internal chamber, and a propulsion ring is retained within the housing such that a liquid introduced into the propulsion ring causes the propulsion ring to rotate and passes into the chamber. The rotor body is pivotally supported within the chamber and is operably coupled to the propulsion ring such that the rotor body moves along with the propulsion ring. The rotor body rotates about the housing, such that the liquid exits the chamber in a rotating jet.

Abstract: A high-pressure rotary nozzle includes a magnetic coupling for the purposes of driving a rotor body within the nozzle housing. The nozzle housing defines an internal chamber, and a propulsion ring is retained within the housing such that a liquid introduced into the propulsion ring causes the propulsion ring to rotate and passes into the chamber. The rotor body is pivotally supported within the chamber and is operably coupled to the propulsion ring such that the rotor body moves along with the propulsion ring. The rotor body rotates about the housing, such that the liquid exits the chamber in a rotating jet.

Abstract: A transformable mechanic's creeper assembly for providing support to the user in either a recumbent or sitting position with selectable height. The transformable mechanic's creeper assembly includes a first deck assembly, a seat assembly, a second deck assembly couplable to either the first deck assembly or the seat assembly, a plurality of spacing members couplable to the deck and seat assemblies adapted for adjusting the overall height of the assemblies, and a plurality of wheels couplable to the spacing members.

Abstract: A calibration circuit adjusts a differential output voltage from a line driver circuit when the differential output voltage falls outside a specified tolerance range. The calibration circuit includes a sample and hold circuit which samples the differential output voltage and holds a representative signal. A comparator compares the held signal with a reference voltage signal. When the held signal is greater than the reference voltage signal the comparator outputs a LOW signal and when the held signal is less than the reference voltage signal the comparator outputs a HIGH signal. The comparator output signal is stored in a memory circuit of a control logic. The control logic instructs an up/down counter to increment when the comparator output is LOW and to decrement when the comparator output is HIGH. A calibration current source sinks a unit of calibration current when the comparator output is LOW and sources a unit of calibration current when the comparator output is HIGH.

Abstract: An analog-to-digital converter (ADC) voltage offset (VOS) reduction circuit architecture is for use with an ADC that includes a resistive ladder network and a differential-to-single ended converter. The DC level of the single-ended output of the differential-to-single ended converter is nominally set at the mid-point of the resistive ladder network. The VOS reduction circuit includes a VOS comparator bank that receives the single-ended output, compares it with a plurality of input signals from the resistive ladder network, and provides the result of the comparison as a plurality of VOS comparator bank signals. A current digital-to-analog converter (IDAC) is coupled to receive the VOS comparator bank signals, via a latch bank, and to provide a current responsive thereto.