56results about How to "Little and maintenance" patented technology

A method and apparatus for determining a fluid level and/or output flow during operation of a centrifugal pump, are provided, which may be used for production of gas and/or oil from a well, and include a vector feedback model to derive values of torque and speed from signals indicative of instantaneous current and voltage drawn by the pump motor, a pump model which derives values of the fluid flow rate and the head pressure for the pump from torque and speed inputs, a pumping system model that derives, from the estimated values of the pump operating parameters, an estimated value of fluid level and other pumping system parameters. Controllers responsive to the estimated values of the pumping system parameters control the pump to maintain fluid level at the pump input, near an optimum level, or within a safe operating range and/or output flow from the pump.

The present invention provides a device for producing a water treatment solution from a solid chemical block for distribution into a water system selected from the group comprising an institutional water system and an industrial water system. The device includes a housing to contain the solid chemical block. A fluid, preferably water at ambient temperature, is introduced into the housing to dissolve the block and form a liquid solution that may then be dispensed into either an institutional water system or an industrial water system. A method of dispensing the liquid solution with the device is also provided.

The present device is a microchannel separator that uses a separation driving force created by an electric field. An ionic fluid flows through the microchannels and is subjected to an electric field by two spaced apart parallel electrodes possessing an electric charge. The ions in the ionic fluid are attracted towards the charged electrodes and thus are concentrated in the region of flow near the charged electrodes and depleted from the central region of flow between the charged electrodes. The charged electrodes are insulated from the ionic fluid by an impermeable barrier which prevents arcing and adherence of the ions to the charged electrodes. After a sufficient length of passage of the ionic fluid through a main channel two blocking plates separate the flow into a central and two outer output channels. The central channel draws a portion of the ionic fluid from the central region of the main channel that has fewer ions than the ionic fluid in the regions near the charged electrodes. The concentrated ionic fluid in the outer channels is discharged separately from the central channel.

A LED light fixture and a luminous flux monitoring system for a light fixture. The light fixture includes a housing defining an interior space including an interior surface and a transmissive panel. A light source is coupled to the interior surface. The system includes a light sensor coupled to the interior surface and aligned to receive light from the transmissive panel, light source, and/or interior surface. The light sensor is configured to measure luminous flux in the interior space. A controller is coupled to the light source and the light sensor. The controller is configured to determine if a light sensor measurement of luminous flux in the interior space is more or less than a reference value of the luminous flux. If the measurement of luminous flux is less than the reference value, the controller is configured to activate an end-of-life indicator. The reference value equals (total flux−internal ambient flux)×depreciation factor.

A solar panel that utilizes the sun's rays to heat a liquid to be used for providing heat or hot water includes front and rear parallel but spaced apart clear plastic panels. Each panel has a front surface, a back surface and left and right side edges. The front panel is intended to face the sun and is substantially transparent so that the sun's rays can pass therethrough. The rear panel has a reflective coating thereon wherein rays from the sun that pass through the front panel and through the space between the panels is reflective back toward the space. Located within the space between the panels are a plurality of conduits formed by a plurality of internal walls that extend between the front and rear panels and between the left and right side edges. Within the conduits is a darkened oily liquid that is heated by the incoming rays of the sun and by the rays reflected by the rear panel. In a preferred embodiment, the front and rear panels and the internal walls are extruded as a single unit.

An oven configured for drying a container. The oven includes a housing defining an interior space including a supply chamber and a return chamber. A conveyor is configured for movement within a portion of the interior space of the housing defined by a plurality of semi-circular shaped duct sections connected at each end of the semi-circular shaped duct sections to a straight duct section. Each duct section includes two side walls coupled to a back wall defining a continuous U-shaped duct path through which the conveyor moves. The oven is further configured to provide a temperature difference between any two points within the interior space of the oven housing controlled to plus or minus two degrees Fahrenheit, by a uniform air flow throughout the oven. The uniform air flow is facilitated by the sizing and spacing of various circular orifices and slotted orifices in the continuous duct path.

A simulation device for simulating and exploring the effects of different policies used on a machine in a manufacturing system. The simulation device representing the machine includes controls to allow the participation of an operator in simulation modeling. The operator initiates the simulation process by, for example, loading a block into the simulator according to a hypothesis policy. During the simulation, a computer records all the changes in the system and those changes are transmitted to the computer. When the simulation stops, the total number of items completed by the system represents the throughput of the system during the simulation time. The operator can view the results of the simulation and change the policies and repeat the simulation using the same system structure or parameters.

A trash can lid has incorporated in it an apparatus for coupling to and receiving water from a hose and conveying the water to a spray-head mechanism, wherein the water is pressurized and from whence the pressurized water is directed against the angled blades of rotary water-deflector, such that a rotary spray of pressurized water is directed against the interior walls of the trash can, thereby flushing wastes from the walls to the bottom of the trash can.

System and method for measuring static load by using a piezoelectric load sensor with a feedback technique to compensate for the signal loss due to charge leakage, and therefore ensures measurement accuracy. The system is integrated with other structure, objects and devices to measure static loads applied to a mechanical shaft, in an on-line, in-process, quasi real-time fashion. The system can be used to measure static load and thus oversee an entire machine system or a manufacturing process.

An assembly for producing air projectiles. The assembly includes a driver with an attached converging nozzle. The driver includes a flexible diaphragm and is responsive to an electrical control signal to displace the flexible diaphragm from a first position to a second position. In one embodiment, the driver is an audio speaker driver such as a woofer and the diaphragm is a speaker cone or diaphragm. The nozzle has an inner bore or chamber that converges from a first size at a first end proximate to the driver to a second, smaller size at a second distal end. The second end of the nozzle may include a planar muzzle extending perpendicular to a central axis of the bore and including an outlet smaller than the diaphragm diameter. The driver has a rapid response to control signals such as less than about 20 milliseconds to produce a projectile at the muzzle.

A needleless injection device and method for injecting a food subject is disclosed in which one or more types of liquid food additive are individually and/or simultaneously delivered to a food subject within a sealed injection chamber or compartment. The needleless injection device and method of the present invention utilizes rapid, high pressure injection bursts to completely and uniformly inject the food subject, allowing different food subjects or different food additives to be sequentially injected in an efficient and instant manner. The needleless injection device and method for injecting minimizes contamination by totally enclosing the injection process within a sealed chamber, and by eliminating the need for the injection nozzles to contact, or be placed immediately adjacent to the food subject.

A rotor system vibration absorber for use with a helicopter of other rotocraft is disclosed in which spring forces are provided by a plurality of elongated rods (73) arranged in a selected pattern. The rods are coupled at one end to a fixed base (79) that is coupled to a rotor hub (55), and at the other end to a tuning weight (81).