Abstract: Systems and methods for suppressing vaporization of a volatile fluid dispensed from a pressure vessel are provided. The system includes an evaporator coupled in thermal communication with a first flow of volatile fluid from the pressure vessel and in fluid communication with a second flow of volatile fluid from the pressure vessel. The evaporator includes at least one channel therein for channeling the second flow of volatile fluid therethrough. In addition, the system includes a compressor coupled in fluid communication with and downstream from the at least one channel. Moreover, the system includes a return line coupled in fluid communication with an outlet of the compressor. The compressor is configured to compress the second flow of volatile fluid and channel the compressed second flow of volatile fluid to the pressure vessel via the return line.

Abstract: The dog walking and watering device enables the user to provide his or her dog with water while away from their usual drinking receptacle. Fluid is stored in a fluid source or reservoir and then delivered to a drinking receptacle. A dispensing actuator controls the valves and positions the drinking receptacle of the device. The dispensing actuator adjusts between a transport position and a use position. In the transport position, the drinking receptacle is adjusted inward toward the body of the device and the dispensing valve closes to limit fluid delivered to the drinking receptacle. In the use position, the drinking receptacle is adjusted outward away from the body and the dispensing valve is open are arranged such that fluid flows to the drinking receptacle from the fluid source or reservoir.

Abstract: [Problem to be Solved] A technical object is to develop a novel cooling mechanism for a data center that can be operated at low running costs, can eliminate dust penetration, water droplet occurrence, and water leakage, can reduce temperature unevenness in the indoor space, and can achieve prompt fire extinction with little damage even in the case where a fire breaks out. [Solution] Provided is a cooling mechanism for a data center, including: an evaporative condenser and a liquid receiver arranged outside of the data center; and an evaporator arranged in an indoor space of the data center. The indoor space is cooled by evaporating a refrigerant in the evaporator, and the refrigerant is condensed by the evaporative condenser.

Abstract: An apparatus for at least partially closing a throughbore is described. The apparatus comprises an apparatus housing, the apparatus housing defining a throughbore and a plurality of closure elements, each closure element being adapted to move between a retracted position, in which the throughbore is fully open, and a deployed position, in which the throughbore is at least partially closed, at least a portion of the movement of each closure element between the retracted position and the deployed position being rotational.

Abstract: A refrigerator is provided that may include at least one compressor that compresses a refrigerant, a condenser that condenses the refrigerant compressed in the at least one compressor, a refrigerant tube that guides the refrigerant condensed in the condenser, a plurality of evaporation passages, in which expansion devices may be respectively disposed, the plurality of evaporation passages branching from the refrigerant tube, a flow adjuster disposed in the refrigerant tube to supply the refrigerant into at least one evaporation passage of the plurality of evaporation passages, a plurality of evaporators, respectively, connected to the plurality of evaporation passages to evaporate the refrigerant decompressed in the plurality of expansion devices, and a liquid refrigerant supply device disposed at an outlet-side of the condenser to separate a liquid refrigerant of the refrigerant heat-exchanged in the condenser, thereby supplying the liquid refrigerant into the flow adjuster.

Abstract: A leak detection system for the rapid and accurate detection of the mean surface level change of a body of liquid is provided. The system is capable of sensing mean surface level changes under static or turbulent surface conditions. In one embodiment, the system includes a rigid walled sensor pod with at least one inner pod cavity that is so positioned to receive liquid from a body of liquid such that dynamic equilibrium is possible and maintained between the mean surface level of the body of liquid and the amount of liquid in the inner cavity. The system further includes a sensor assembly having a stiction free float operating in conjunction with a strain gauge, and microprocessors applying algorithms to process, display, and report the sensor data in accordance with the needs of the end user or to initiate actions for automated control functions.

Abstract: The invention relates generally to laboratory systems that employ fluids, such as deionized water or other aqueous media. In particular, in certain embodiments, the invention provides automated systems for supplying fluids to laboratory equipment and uses thereof.

Abstract: A method and apparatus for extending the usage life of cooking oil used in a deep fat fryer in which the desired cooking oil usage life is determined. Upon the occurrence of a triggering event, the level of cooking oil in the vat of the deep fat fryer is varied between an upper first level and a lower second level by extraction of used cooking oil from the vat until the cooking oil level reaches the lower second level and subsequent input of fresh cooking oil until the level of cooking oil, used and fresh, in the vat reaches the upper first level.

Abstract: A leak detection system for the rapid and accurate detection of the mean surface level change of a body of liquid is provided. The system is capable of sensing mean surface level changes under static or turbulent surface conditions. In one embodiment, the system includes a rigid walled sensor pod with at least one inner pod cavity that is so positioned to receive liquid from a body of liquid by way of an opening below the surface of the liquid such that dynamic equilibrium is possible and maintained between the mean surface level of the body of liquid and the amount of liquid in the inner cavity. The system further includes a sensor assembly having a stiction free float operating in conjunction with a strain gauge, and microprocessors applying algorithms to process, display, and report the sensor data in accordance with the needs of the end user or to initiate actions for automated control functions.

Abstract: The invention concerns a regulating valve for the discharge of liquid from a container comprising a movable main valve body for opening and closing an outlet opening for the liquid to be discharged, and a movable pilot valve body for controlling the main valve body, characterized in that the main valve body and the pilot valve body are mechanically coupled together at least in one position relative to each other.

Abstract: Systems and apparatus for controlling the flow of fluid into a tank, such as a fuel tank on heavy equipment. An inlet valve includes a head portion for making connection with a nozzle, a receiver attached thereto and a piston which closes against a face in the head portion. A float valve includes a float and a valve which seals when a predetermined fluid level is reached. A bleed line is used to connect the receiver to the float valve. The unique design allows placement of the float valve at any desired height within the tank, and placement of the bleed line inside or outside of the tank as may be desired for the application.

Abstract: A universally fitting apparatus to hang onto an aquarium or sump and automatically regulate replacement of evaporated water in real time. Further, while maintaining the fluid level and salinity of the total body of water, a normally closed solenoid, actuated by a float switch, will act redundantly with a float valve to meter incoming fluid. Said solenoid will act to close the water source in the event that the float valve fails to operate or in the event of power failure to shut off the incoming water. For additional safety, the power supply may be plugged into an electronic programmable timer to further minimize the likelihood of an overflow.

Abstract: An apparatus and method for ensuring that the flow of water to a toilet tank is shut off. The first preferred embodiment of the invention combines a conventional float mechanism to shut off the flow of water to a toilet tank when full, with a timer mechanism to shut off the flow of water if the float mechanism fails. There is also a manual override to shut off the flow of water if both the float mechanism and the timer mechanism fail. In the second preferred embodiment, the float mechanism is in the toilet bowl, and shuts off the flow of water when the water level rises in the bowl above a certain level after the toilet is flushed, with the timer mechanism again backing up the float mechanism. In the third preferred embodiment, there are two float mechanisms, one in the tank and the other in the toilet bowl.

Abstract: A highly reliable digital level sensor assembly is provided to replace optical and capacitance type sensors in high purity chemical delivery systems. The digital level sensor assembly is particularly useful in bulk chemical refill delivery systems for high purity chemicals employing a manifold that ensures contamination free operation and canister change outs with a minimum of valves and tubing.

Abstract: A zero to 100% continuously adjustable, low deadband, point contact pneumatic level switch is used in conjunction with an electronic controller, a pneumatic-to-current converter and a current-to-pneumatic converter to control brine level in a gravity-fed batch process. The apparatus includes a flapper disc assembly that is free to rotate or spin in place as the mechanism tracks the level of the fluid and a nozzle to seal, expel and transmit a pneumatic signal for measurement or control of fluid level. The flapper disk/nozzle assembly does not come in contact with the controlled fluid.

Abstract: A fill valve assembly for a water tank such as a toilet tank. The fill valve assembly includes a head portion containing a valve mounted on top of a vertical water outlet tube and a float which moves vertically along the outlet tube to control the opening and closing of the valve. The float is vertically adjustable without removal or disassembly of the valve assembly in order to adjust the tank water level to a preselected position. The float includes an inverted cup-shaped structure which moves vertically along the outlet tube in response to any change in the water level. The valve contains a flexible main valve disk held in a closed position against a valve seat by water pressure in a control chamber to prevent the flow of water into the tank, and is moved to an open position upon venting of the control chamber. A pilot valve controls the pressure in the control chamber and, therefore, the movement of the main valve disk.

Abstract: A fluid level control apparatus for selectively controlling the movement of liquid flowing out of a flotation cell is described. The fluid level control apparatus is significantly reduced in size in comparison with the flotation cell or cells to which it is connected which enables less expensive construction and reduced operating costs in terms of both the equipment and the plant as a whole. The fluid level control apparatus comprises a vessel having a valve positioned therein which includes a valve body structured with a curved surface which provides selective and finite control of fluid flowing through the vessel of the control apparatus.

Abstract: A water management system for a motor vehicle in which water is collected from the condenser (1) of the air-conditioning unit, stored in a master water tank (5) and distributed therefrom to the battery (15), screen wash jet (27) and radiator (37). The vehicle owner is thus spared the inconvenience of regularly checking and topping up the water supply for these items. The risk of breakdown is also reduced. In another aspect of the invention, a wet battery (15) incorporates a plurality of float valves (75) for regulating the fluid level in respective cells (61, 63) of the battery. Water is passed through a common channel (23) into which the float valves (75) open when the fluid level is below a preset limit. The battery fluid is thereby automatically kept at the required level for optimum performance and lifetime of the battery.

Abstract: A closed type water storage container with water level controller and air filtering device, wherein the closed type water container is linked to the water level controlling device by a connection tube and the connection tube is provided with filtering materials for filtering of the moving water at the water level controlling device, such that water and air within the storage container are filtered and clean.

Abstract: A waste line stoppage detector and automatic water shutoff system is utilized to prevent the overflow of raw sewage from a plumbing fixture. Electronic shutoff valves are electronically connected to a waste line stoppage detector. One application involves using an electronic waste line stoppage detector. Another application involves using a diaphragm and switch waste line stoppage. A further application involves using a float ball and switch waste line stoppage detector.

Abstract: A waste line stoppage detector and automatic water shutoff system is utilized to prevent the overflow of raw sewage from a plumbing fixture. Electronic shutoff valves are electronically connected to a waste line stoppage detector. One application involves using an electronic waste line stoppage detector. Another application involves using a diaphragm and switch waste line stoppage. A further application involves using a float ball and switch waste line stoppage detector.

Abstract: An electrostatic spray system has a high voltage section where an electric charge is applied to a liquid and the high voltage section is isolated from a lower potential section, such as a frame. The spray system has components on the high voltage section that communicate for operating functions with other components on the low voltage section, such as a liquid level sensor that controls flow into a liquid reservoir or valves on the high voltage section controlled from the low voltage section. Radio controls are provided for the components so there are no physical links for the operation of the components that can provide current leakage paths back to ground.

Abstract: A highly reliable digital level sensor assembly is provided to replace optical and capacitance type sensors in high purity chemical delivery systems. The digital level sensor assembly is particularly useful in bulk chemical refill delivery systems for high purity chemicals employing a manifold that ensures contamination free operation and canister change outs with a minimum of valves and tubing.

Abstract: An oil level regulator is provided for controlling the oil level in the crankcase of one or more refrigeration compressors or the like. The regulator has a closed chamber for containing the oil. A float-controlled switch is operable to actuate a solenoid valve for introducing liquid into the chamber as necessary to maintain the oil level in the chamber and compressor crankcases.

Abstract: A waste line stoppage detector and automatic water shutoff system is utilized to prevent the overflow of raw sewage from a plumbing fixture. Electronic shutoff valves are electronically connected to a waste line stoppage detector. One application involves using an electronic waste line stoppage detector. Another application involves using a diaphragm and switch waste line stoppage. A further application involves using a float ball and switch waste line stoppage detector.

Abstract: A highly reliable bulk chemical refill system for high purity chemicals is provided. The system employs at least one metallic level sensor in a refillable ampule. The refillable ampule of the present invention comprises a metallic level sensor for sensing a high level or full level in the ampule. The metallic level sensor transmits this signal to a control unit that automatically stops the refilling process. Additionally the refillable ampule includes a low level sensor that either provides an automatic signal for starting the refilling process or an audible or visual alarm to alert an operator that the container is empty and requires refilling. At the same time, the low level sensor sends a signal to the processing equipment indicating the empty state of the ampule.

Abstract: Pulse width modulation is used to control the flow rate through a solenoid expansion valve in a refrigeration system using a simple vapor compression cycle. The refrigeration cycle includes a phase separator which receives two phase refrigerant from the condenser and supplies liquid refrigerant to the pulse width modulated solenoid valve. A liquid level sensor is disposed in the phase separator, and a controller for controlling the duty cycle of the pulse width modulated solenoid valve is provided to receive input from the liquid level sensor. The liquid level sensor can be of the type which provides a continuously variable signal as a function of liquid level, or it can be a liquid level switch which controls valve duty cycle on the basis of whether the phase separator liquid level is above or below a set level. Alternatively, two liquid level switches can be provided.

Abstract: An improved float to prevent over-filling of a dishwashing machine including a cylindrical main float body, a skirt attached to the main float body and extending outwardly and downwardly therefrom, and a float stem. The main float body includes a lower portion which extends downwardly beyond a lower terminal portion of the skirt, and serves as a suds stop to prevent suds created during operation of the dishwasher from rising up within the hollow interior of the main float body and flowing down a stand pipe upon which the float is mounted. The lower portion of the main float body includes a slotted opening which serves as a vacuum breaker to prevent a vacuum from being created within the main float body which would cause the float to adhere to bottom wall of the dishwasher tub.

Abstract: An apparatus for conserving utilities including coolant, in a system having an evaporative cooler equipped with a water reservoir for holding a predetermined amount of cooling water and also equipped with a recirculating system for recirculating the cooling water. The apparatus has a level sensing assembly coupled to the water reservoir. The level sensing assembly provides a first signal when the cooling water level is less than a first predetermined limit. The system has a controller coupled to the level sensing assembly for receiving the first signal. The system also has a supply valve coupled to the water reservoir, to a water supply and to the controller. The supply valve is responsive to signals from the controller. The supply valve delivers water from the water supply to the water reservoir. The system further has a bleed valve coupled to the water reservoir and to the controller. The bleed valve is responsive to signals from the controller.

Abstract: A water-conducting household appliance includes a liquid container having a static content level, a fill control device, a cycle control unit, an inflow valve to be opened by the cycle control unit and closed by at least one of the fill control device and the cycle control unit, an evacuation pump, a switch having a switching position in which the switch turns on the evacuation pump and selectably closes the inflow valve, and a chamber hydraulically communicating with the liquid container and having an opening for the entry of water. A safety device for the appliance includes a safety level switch device having a float disposed in the chamber, the float having a switching position in which the float acts upon the switch, and the float having a position of repose in which the float is kept at a distance above the static content level and in which the float acts upon the switch to switch off the evacuation pump.

Abstract: An automatic cold/hot distilled water fountain which automatically performs water boiling, condensing, storing and heating processes to provide purified cold/hot drinking water, mainly composed of a distilling chamber, a condensing mechanism, a water reservoir and a heating box, whereby by the automatic control system designed for the water fountain, the water is controllably supplied into the distilling chamber and distilled therein and the distilled water is then collected and stored in the water reservoir to be directly discharged therefrom as a purified cold drinking water or further heated by the heating box to serve as hot drinking water. By the above arrangement, the amount of the water stored in the water fountain is properly kept within a predetermined range and what is most important is the safety and hygiene in water drinking is insured.

Abstract: A water and sewerage system for a construction, has at least one water consumer, at least one water supply pipe adapted to supply water from a water source to the water consumer, at least one water drainage pipe adapted to drain water from said consumer to a sewage reservoir and the like, a water level sensor cooperating with the water drainage pipe so as to sense when water reaches a predetermined level in the water drainage pipe, and at least one water supply interrupting element cooperating with the water supply pipe and connected with the water level sensor so that when water in the water drainage pipe reaches the predetermined level the sensor sends a signal to the water supply interrupting element and the water supply interrupting element interrupts water supply in the water supply pipe.

Abstract: Apparatus comprising a vessel capable of receiving a variable supply of an aqueous ice slurry in which an upper packed ice bed can float on an aqueous volume; a hollow conduit having a first end located in the lower internal space of the vessel and a second end located exterior of the vessel; a float positioned in the vessel lower internal space; and a movable line in the hollow conduit joined at one end to the float, and the line second end extending out of the conduit second end thus permitting it to be displaced to indicate the position of the float, and thus the bottom of the packed ice bed, when it contacts a packed ice bed bottom.

Abstract: A dishwasher is provided with an improved apparatus for protecting the tub from being overfilled in the form of a float having a float stem that is automatically captured upon insertion through a passage in the tub bottom wall such that the float will be restrained against disengagement from the tub bottom wall. The float is vertically movable to operate a control switch for regulating the level of water within the tub. Preferably a retaining ring is carried on a stem of the float which is automatically biased through a varying diameter keyway and is subsequently moved to a captured position below the member having the keyway.

Abstract: Water control apparatus for evaporative cooling system includes a medium which is saturated with water from a water supply and water draining from the medium is directed to a pan or trough in which there is a float system and which includes orifices through which water flowing into the pan flows out of the pan. The float system includes a microswitch which controls a solenoid connected to the water supply system either directly or indirectly through a time delay relay. The relay may be variable so that the delay time may be adjusted in accordance with appropriate parameters.

Abstract: The system is designed to shut-off the flow of liquid in a conduit, unattended, i.e., automatically, in the event of a liquid conduit rupture, liquid overflow, or the like. A float which carries a mercury switch is set over a recess formed therefor and into which liquid can flow and collect. The float rises with the collected liquid, and the mercury switch activates a solenoid valve which is interpositioned in a pressured-liquid conduit, to halt the flow of liquid through the conduit. The recess is formed in a lowermost portion of an area in which the subject conduit is sited.

Abstract: The momentary position, between open and closed, of a bottom door panel controlling release of fluid from an airborne container containing the fluid is governed by both the height of the fluid in the container and the instantaneous position of the door panel.

Abstract: The System is designed to shut-off the flow of liquid in a conduit, unattended, i.e., automatically, in the event of a liquid conduit rupture, liquid overflow, or the like. A float which carries a mercury switch is set over a recess formed therefor and into which liquid can flow and collect. The float rises with the collected liquid, and the mercury switch activates a solenoid valve which is interpositioned in a pressured-liquid conduit, to halt the flow of liquid through the conduit. The recess is formed in a lowermost portion of an area in which the subject conduit is sited.

Abstract: A liquid level control in a refrigeration system operates a solenoid valve to maintain the level of liquid refrigerant in a vessel within a range defined by predetermined lower and upper liquid levels, sounds an alarm if the upper level is exceeded and stops a pump if the lower level is violated. The control comprises a float assembly and a switching assembly. The float assembly comprises a float chamber connected to the vessel, a float ball therein, a vertically extending float rod connected to the float ball and movable along a vertical path, and a pair of spaced apart stop members on the float rod disposed within the switching assembly. The switching assembly comprises a switch actuator permanent magnet, having magnet poles at opposite ends, slidably mounted on the float rod between the stop members and movable thereby along the said path.

Abstract: A sensor for sensing the quantity of refrigerant in a closed loop refrigeration system, with the sensor having attachment means on a lower portion thereof such that it may be installed in direct communication with the refrigerant line of the refrigeration system. The sensor has a hollow interior portion defined by generally cylindrical sidewalls, in which interior portion a float of conductive material is disposed, with the float being free to rise on the surface of liquid refrigerant entering the interior of the sensor from the refrigerant line. At least one electrode is disposed in the interior of said sensor, in a position such that it will be contacted by the float at the time a certain refrigerant level is reached in the interior of the sensor.

Abstract: A liquid level sensor and controlling assembly disposed and mounted in direct communication with a reservoir of liquid to be monitored and including a float structure connected to an elongated stem formed of magnetic material which is disposed to selectively move, in accordance with the movement of the upper surface level of the liquid between a primary coil and a secondary coil. A constant voltage supplied to the primary coil results in a magnetic flux and a voltage being induced into the secondary coil based upon position of the magnetic material stem relative to the secondary coil thereby determining that the induced voltage in the secondary coil is directly related to the level of the liquid since the position of the magnetic stem within the secondary coil is controlled by the level of liquid within the reservoir.

Abstract: A fluid flow chamber including a housing defining a chamber, a chamber inlet and a chamber outlet for flow of liquid therethrough, a float in the chamber, and a magnet and magnetic position sensor, one of which is carried by the float for movement with the change in liquid level in the chamber, the other of which is fixedly mounted with respect to the housing.

Abstract: An improved liquid level controller having a housing, a body connecting from the rear of the housing for connecting directly to a vessel and to allow transmission of forces exerted by the displacer type float within the vessel responsive to changes in the level of liquid therein through the housing to a shaft having rotation about an axis extending horizontally and parallel to the rear of the housing, a torque bar pivotally mounted near its center to the body, means for imparting the rotational force of said shaft as an upward force to one side of the torque bar, means biasing the torque bar in a direction to maintain it in contact with and balance the force from said force imparting means, a control means having a supply and an output for actuating a liquid control, a proportional band mechanism including a lever pivotally mounted to said housing at one end and having a fulcrum member slidably mounted thereon for engaging said torque bar to transmit the slight motion of said torque bar in balancing the force

Abstract: A mixture control system for mixing a bactericidal chemical and water in a reservoir in batches. Flow of the water into the reservoir is initiated by a float actuated switch and the duration of the flow is controlled. While the flow is occurring, a dispenser dispenses chemical into the reservoir according to a preset dispensing cycle which is initiated when the water flow is initiated and also terminates therewith.

Abstract: A pair of flapper valves are mounted in parallel to control the flow of a fluid into a reservoir. The flapper valves are opened by a first rotatable cam which is rotated through one or more complete revolutions when a float control switch in the reservoir is opened thereby indicating a drop in the level of fluid in the reservoir. Each complete revolution of the first cam actuates an impulse switch for a short duration. The impulse switch energizes a low speed memory motor and increments the output shaft of the motor. Each increment corresponds to one complete revolution of the first cam and, therefore, one unit of a fixed quantity of fluid passing through the valves. The output shaft of the memory motor rotates a second adjustable cam that controls the actuation of a switch which in turn controls a dispenser for dispensing a chemical additive into the fluid added to the reservoir.

Abstract: A float operated valve is provided with the rise of a float being temporarily prevented by the elastic force of a spring mounted on the valve body. When the buoyant force of the float reaches a predetermined maximum buoyant force as a result of the water level rising and the float becoming increasingly submerged, the buoyant force of the float moves the spring and closes the valve. The valve is also shown with a twin float construction for on/off operation at low and high water levels.

Abstract: In place of one of the usual blunt seats, a sewer check valve has a knife-edge extending from one of the seats to eliminate holding of compressed, relatively tough chunks of sewage between seats by cutting through the chunks, and has room for the cut pieces to move away from the seats. The flap of the valve has a lever extending therefrom, and a spring actuated rod retained by a catch is released to strike against the lever for forcing the flap against the knife-edge. The catch may be released manually, but is preferably released by slightly delayed operation of a solenoid in response to operation of a level sensing device in the housing of the valve.

Abstract: A pool water regulator has two vertical pipes which indicate the pool water level. Each pipe has a floating element disposed therein, and each float element has a switch secured to a distal end protruding from the vertical pipes. Brackets are mounted adjacent the switches so that as the float elements rise and fall, the switches are turned ON and OFF thereby activating either pool draining or pool filling means.

Abstract: In a continuous casting apparatus, the level of liquid in the mold is monitored and compared to a desired reference level. A microcomputer examines the resulting error signal and determines the amount of movement of the valve which would be appropriate to correct the detected error. A control pulse is then generated having a duration corresponding to the desired movement distance, and the valve is adjusted accordingly.

Abstract: A liquid level regulator for the solvent of a dry cleaning machine comprises a box-like body mounted within a cleaning chamber of the machine and having holes to allow the solvent to penetrate thereinto, wherein the liquid is calmed and forms a substantially even level. This level is detected in order to control the same both within the machine chamber and within the box-like body.