Abstract: The present invention describes an automated, transportable and energy-efficient with a hybrid power capacity wastewater treatment facility that allows for the disinfection of contaminated sanitation wastewater in order to preserve the environment and provide a greater availability of this resource and its reuse. The facility described in the present invention allows to carry out a process for water treatment in five stages based in equalization, oxidation sedimentation, disinfection and filtration. Moreover, it has a photovoltaic feeding system and a night lighting system that allows the operation of the facility in a hybrid way during the day and the night, as well as a structure that allows its easy transportation. Finally, the facility has an automated system comprised by a control panel that allows to manage and monitor every operational condition of it, that integrates and sends all processed programmable information to a programmable logic controller.

Abstract: A filter cartridge of a filter group of a fluid of a vehicle extends along a main axis including a base assembly and engagement members including first engagement members in the filter cartridge and second engagement members in the base assembly, respectively specially shaped to engage each other in a blocking configuration. The filter cartridge extends along a cartridge axis and includes at an axial end an engagement plane on which the first engagement members are made including at least two tooth elements diametrically opposite the cartridge axis. Each tooth element extends in height from the engagement plane extending on an imaginary surface parallel to the cartridge axis, having a substantially T shape. Each tooth element is elastically yielding in a radial direction, so that the blocking configuration is achievable following the radial movement of the tooth element.

Abstract: The invention relates to a retaining apparatus (1) having a filter element (3) in a fluid line (2) which can be flowed through in a flow direction (V) by a fluid (F) comprising a foreign fluid (X), having a volume flow control apparatus (5) by way of which the volume flow (S) through the fluid line (2) can be controlled, having a sensor device (6) by way of which the fraction of foreign fluid (X) in the fluid (F) can be determined, and having a control device (7) by way of which the volume flow (S) can be controlled by way of the volume flow control apparatus (5) in a manner dependent on the fraction of foreign fluid (X) in the fluid (F) as determined by way of the sensor device (6). The invention furthermore relates to a fuel tank filling installation having said retaining apparatus, and to a method for retaining foreign fluid from a fluid.

Abstract: A cooling apparatus for cooling a to-be-cooled device is described. The cooling apparatus includes a cabinet body configured to contain a cooling medium for at least partially immersing the to-be-cooled device, a volumeter for detecting a volume of the cooling medium in the cabinet body, and a storage tank storing the cooling medium. The storage tank and the cabinet body are communicatively connected to each other. Further, when the volumeter detects that the volume of the cooling medium in the cabinet body is lower than a preset volume, the storage tank and the cabinet body come into mutual communication so that the cooling medium in the storage tank is transferred into the cabinet body.

Abstract: A filter cartridge of a filter group of a fluid of a vehicle extending along a main axis has a base assembly and engagement members, including first engagement members in the filter cartridge and second engagement members in the base assembly, shaped to block each other. The filter cartridge extends along a cartridge axis and includes an engagement plane on which the first engagement members are made having tooth elements diametrically opposite the cartridge axis. Each tooth element extends from the engagement plane parallel to the cartridge axis, having a stalk and a head. In the blocking configuration, the second engagement members engage the head. Each tooth element is radially elastically yielding, so the blocking configuration is achievable following radial movement of the tooth element. The first engagement members include for each tooth element a command device extending radially. Radial movement of the tooth element actuates the command device.

Abstract: Various example embodiments relate to an automatic drain system for use with a fluid water separator. The automatic drain system includes a liquid-in-fuel sensor. The liquid in-fuel sensor is configured to detect a liquid level in a water sump. The solenoid has an open state and a closed state. A control unit is configured to activate the solenoid in response to a signal from the liquid-in-fuel sensor. Activation of the solenoid causes the solenoid to go from the closed state to the open state. The automatic drain system is placed in a condition for allowing fluid flow through the automatic drain system from the water sump.

Abstract: A multistage compression system uses refrigerant and oil. The multistage compression system includes a low-stage compressor that compresses the refrigerant, a high-stage compressor that further compresses the refrigerant compressed by the low-stage compressor, refrigerant pipes that introduce the refrigerant compressed and discharged by the low-stage compressor into a suction part of the high-stage compressor, an intercooler, and an oil discharge pipe. The intercooler cools the refrigerant discharged by the low-stage compressor before the refrigerant is sucked into the high-stage compressor. The intercooler is disposed between the refrigerant pipes. The oil discharge pipe discharges the oil in the low-stage compressor. The oil discharge pipe connects the low-stage compressor and a portion of the refrigerant pipes. The portion of the refrigerant pipes is on an upstream side of the intercooler.

Abstract: One embodiment of a fuel tank assembly includes a fuel sending unit having a float with a small thickness, which heretofore has been too thin to secure a stand-alone magnet thereon. The float may be manufactured in a complex shape or in a small size. In one embodiment the float may be manufactured of a material having magnetized particles interspersed throughout the float such that the float does not require a stand alone magnet secured thereon. The float may be manufactured of a material having a foaming agent added thereto so as to provide a finished product with air filled voids positioned throughout the float to increase the buoyancy of the finished float product.

Abstract: Systems, methods, and computer-readable storage media for dynamically adjusting sensors for use in compactors and receptacles. A receptacle first sends a signal from a transmitter on a first module in a receptacle to a receiver on a second module in the receptacle, wherein the first module is located on a first inner wall of the receptacle and the second module is located on a second inner wall of the receptacle, and wherein at least part of the first module and the second module is located a distance above a bin inside the receptacle. Next, the receptacle determines a signal-detection characteristic including a signal detection status or a number of signal pulses associated with a signal detection. Based on the signal-detection characteristic, the receptacle determines an operating condition of the receptacle, the operating condition including a fullness level or an obstruction level associated with the first or second sensors.

Abstract: An analyzer for a grease interceptor for measuring levels of fat, oils, and grease (FOG), water, sludge and air having a probe which includes a controller and a sensor sub-unit. Sensor circuits include a microcontroller, timers, and sampling capacitors. The sensor sub-unit includes a plurality of electrode ring pairs coupled to a plurality of timers for converting capacitance measurements to frequencies under the control of a microprocessor in the controller. The frequencies identify the measured levels.

Abstract: A water drain assembly for draining water from a filter assembly comprises a conduit, a water canister, and a venturi. The conduit fluidly connects a bottom portion of the filter assembly to a bottom portion of the water canister. The venturi comprises a first venturi inlet that allows fluid to flow from the fuel tank and into the venturi, a second venturi inlet that allows fluid to flow from the water canister and into the venturi, and a venturi outlet that allows fluid to flow from the venturi and into the filter assembly. The second venturi may comprise a capillary.

Abstract: Unclogging group for unclogging a filter of a pumping group for pumping diesel to an internal combustion engine, the unclogging group comprising: —a metering unit comprising an electromagnetic head and a control valve for controlling the diesel flow; —a filter associated with the control valve made at least in part of metallic material; —a temperature sensor for measuring the ambient temperature; —a control unit coupled to the temperature sensor; —an electrical circuit controlled by the control unit for supplying electrical current to the filter; wherein the control unit is configured so once received the starting input of the pumping group it compares the temperature measured by the temperature sensor with a threshold value, and if the temperature measured by the temperature sensor is less than the threshold value the control unit commands a delay of the starling of the pumping group of a period wherein the control unit supplies electrical current to the electrical circuit connected to the filter.

Abstract: An extracorporeal blood treatment apparatus (1) and a method for checking the connection of a soft bag (30, 24; 33, 34) in the apparatus (1). The apparatus (1) comprises a blood treatment device (2), an extracorporeal blood circuit (3, 5) and a fluid circuit (8, 12, 15, 17, 18, 22; 41, 42, 44).

Abstract: A method of actuating a water softening system is provided. The method comprises providing a sensing device containing sensing material in a water treatment tank of the water softening system, the sensing device being positioned at a top of the water treatment tank with a body thereof partially embedded in a resin bed of the water treatment tank.

Abstract: A liquid dispenser may include a container having an upper opening, a pump provided in the container, a pipe through which liquid discharged from the pump is transferred, a top plate having an upper surface over which liquid flows, a filter assembly provided below the top plate, a base provided below the container, and a thermoelectric element provided in the base to cool the liquid in the container.

Abstract: A filter device including a probe where a filter element probe first end selectively engages with a sensing unit located in a filter head and a filter element probe second end is located in a contaminant portion of a filter canister. The probe fixedly engages through the filter element utilizing a sealing component. The filter element is disposed in the filter canister that engages with the filter head.

Abstract: An apparatus (2) for dissolving a gas into a liquid includes a liquid inlet (4) for supplying liquid into the apparatus, a gas inlet (6) for supplying gas into the liquid within the apparatus and a venturi (52) arranged to dissolve the gas into the liquid passing through the venturi. The apparatus also includes an outlet (18) for the liquid and dissolved gas downstream of the venturi. At least part of the liquid inlet, at least part of the gas inlet, at least part of the venturi and at least part of the outlet are formed in an integrally formed piece of material (42).

Abstract: A filter backwashing unit is disposed in a path in which process gas flows to remove at least a part of trapped dust included in a process gas by backwashing an element of a filter device that traps the dust when a process gas passes. The filter backwashing unit includes a gas injection device disposed downstream of the element in a flow direction of a process gas to inject backwashing gas toward the element from downstream; a parameter detection device configured to detect a parameter used for determination of a state of dust adhering to the element; and a control device configured to estimate a thickness of dust deposited on a surface of the element upstream of a process gas based on a result of the detection, and determine an interval at which the element is backwashed based on the estimated thickness of the dust.

Abstract: An apparatus and method for ozone-aerating fluid is connected to a conventional water treatment system that includes a high pressure fluid pump and a high pressure filter connected to a main reservoir. Included is an auxiliary reservoir and low pressure filter. A first valve controls the fluid flow in a conduit connected to the output of the high pressure filter. A second valve controls the flow of fluid output from the filter to a lift tube. Ozonated air bubbles are injected into fluid in the lift tube. The fluid flows up the lift tube and into the auxiliary reservoir due to expansion of air bubbles. The fluid flows out of the auxiliary reservoir and filter under the force of gravity into the conduit on the downstream side of the first valve and into the main reservoir. A UV germicidal lamp may be positioned in the path of fluid flow.

Abstract: An apparatus for discriminating between liquids having differing thermal conductivities includes a thermally conductive substrate, a resistor and a thermistor mounted to the thermally conductive substrate. Two leads on the resistor enable a current to be passed through the resistor to generate heat, and two leads on the thermistor enable a current to be passed through the thermistor to generate a datum indicative of thermistor temperature. An electrical insulator encapsulates the resistor, the thermistor and part of the thermally conductive substrate. A remainder of the thermally conductive substrate may extend beyond the electrical insulator to provide a thermal path from the resistor and thermistor to a liquid in which the apparatus may be immersed.

Abstract: A filter element for a fuel filter has first and second end plates and a particle filter medium arranged between the first and second end plates. A bayonet protrusion on the first end plate is designed to engage a bayonet receptacle of the filter housing by rotation of the filter element about a filter element longitudinal axis. An internal sealing element on the second end plate is designed to separate a raw side from a water collecting chamber of the fuel filter. The filter housing has a filter housing body and a cover screwed onto the filter housing body. The filter housing has a bayonet receptacle arranged on its inner side. By rotating the filter element about a filter element longitudinal axis of the filter element, the bayonet protrusion engages the bayonet receptacle of the filter housing when the cover is unscrewed from the filter housing body.

Abstract: A dielectric working fluid processor for processing dielectric working fluid used in a wire electrical discharge machine includes: a dirty liquid tank for storing dielectric working fluid containing machining swarf; a filter for removing machining swarf from the dielectric working fluid in the dirty liquid tank; a clean liquid tank for storing the dielectric working fluid from which the machining swarf has been removed by the filter; a pump for supplying dielectric working fluid from the dirty liquid tank to the filter; an inverter for controlling electric power to be supplied to the pump; a pump controller for controlling the rotation speed of the pump by varying the frequency of electric power supplied from the inverter to the pump; and a feed pressure obtainer for obtaining the feed pressure of the dielectric working fluid supplied from the pump to the filter, based on the frequency of the electric power.

Abstract: A water level detector for fuel filters which has a first body and a second body, the first body and the second body being able to be joined together, jointly forming an outer enclosure of the water level detector; and components to detect water in the fuel filters housed by the outer enclosure. The water level detector also includes a plurality of protrusions and housings adapted to transmit relative turning of the first body and the second body together, jointly forming the outer enclosure, and a plurality of tabs and slots adapted to establish axial retention, such that the first body and the second body remain joined together, the first body and the second body jointly forming the outer enclosure.

Abstract: A Spin-on filter assembly that can be used with both suction-side and pressure-side filtration systems is described. The filter assembly screws onto a filter mounting head. The filter mounting head is part of a filtration system that provides fluid to be filtered to the filter assembly. The filter assembly filters the fluid to be filtered through a filter media contained within the filter assembly and provides the filtered fluid back to the filter mounting head. The filter assembly includes an upper seal that seals the clean side of the filter media from the dirty side of the filter media when the filter assembly is connected to the filter mounting head in an installed position. The upper seal includes a sealing ridge that has an elongated shape and is flexible such that the filter assembly can be used on both pressure-side and suction side applications in filtration systems.

Abstract: Fluid filtration systems and methods for servicing thereof are disclosed. The fluid filtration system includes a filter cartridge, a fluid transfer pump, and a valve assembly that can be selectively operated and positioned to achieve a normal filtration mode of operation, a fuel drain mode of operation, and a water drain mode of operation. In the normal mode, the filter cartridge is in an installed position, the pump is rotated in a first direction, and the valve is placed in a first position. In the fuel drain mode, the filter cartridge is in a service position, the pump is rotated in a second direction, and the valve is placed in a second position. In the water drain mode, the filter cartridge is in an installed position, the pump is rotated in the second direction, and the valve is placed in the first position.

Abstract: A fluid drain off system for a fuel filter, the system comprising a float, movable together with a trigger device for a switch, such as a magnet, in response to the level of fluid contaminant, a switch arranged to be selectively triggered by the trigger device upon the fluid contaminant reaching a predetermined level, and a fluid passage configured to be selectively opened in response to the triggering of the switch to allow fluid contaminants to be drained from the filter.

Abstract: In one embodiment disclosed herein, a fluid separation assembly includes a housing, a fluid inlet attached to the housing. a fluid outlet attached to the housing; a mounting bracket; coalescing media; and a cover. The housing includes a first chamber; a second chamber; a wall separating the first chamber and second chamber; and a fluid passage positioned between the first chamber and the second chamber. The fluid inlet is in fluid communication with the first chamber, and the fluid outlet is in fluid communication with the second chamber. The coalescing media is positioned in the first chamber; and the cover is reversible secured to the housing. The fluid separation assembly can further include a first spigot attached to the housing and in fluid communication with the first chamber, and a second spigot attached to the housing and in fluid communication with the second chamber.

Abstract: A tube set for a blood handling apparatus, in particular an extracorporeal blood handling apparatus with an extracorporeal blood circuit or an apparatus for peritoneal dialysis, and a blood handling apparatus that has such a tube set are described. The tube set includes a device for collecting particles provided in a tube line portion of the tube set downstream of the tube portion placed in the occluding hose pump. The device for collecting particles prevents retention of solid substances that are possibly contained in the dialysis fluid, substituate or peritoneal solution. The tube set also has a device for limiting the pressure in the tube line portion between the occluding hose pump and the device for collecting particles. The device for limiting the positive pressure prevents an excessive positive pressure from building up in the tube line when fluid flow through the device for collecting particles is reduced or interrupted.

Abstract: A self-filling graduated cylinder system for efficiently filling a graduated cylinder with a chemical solution. The self-filling graduated cylinder system generally includes a graduated cylinder having an interior, an upper end, an upper opening in the upper end a lower end opposite of the upper end, and a check valve attached to the graduated cylinder near the lower end of the graduated cylinder. The check valve is adapted to allow a liquid chemical to flow upwardly through the check valve into the graduated cylinder and to prevent the liquid chemical within the interior of the graduated cylinder from flowing downwardly through the check valve. A vacuum device is fluidly connected to the graduated cylinder to draw the liquid chemical upwardly to an upper level within the graduated cylinder. Alternatively, a pump device pumps liquid chemical into the graduated cylinder.

Abstract: Parallel processing reverse osmosis water filtration systems using multiple RO (reverse osmosis) filter systems having their raw water input connections coupled together, their product water output connections coupled together and their drain connections coupled together. Using appropriate valving, any one or more reverse osmosis filter systems may be decoupled from the rest of the system for servicing without shutting down the entire system, and one or more additional reverse osmosis filter systems may be added to increase the product water output capacity when needed. Optional features disclosed include enhanced product water storage capacity, control of the total dissolved solids in the product water dispensed, and protection against leaks that may disable one RO filter system, but not the entire parallel processing reverse osmosis water filtration systems. Various embodiments are disclosed.

Abstract: A mixing assembly has a container adapted to receive a continuous flow of turbid or contaminated water. An injector is adapted to inject a quantity of polymer into the container. A settling assembly is adapted to receive a continuous flow of polymer water from the mixing assembly via a pump. A first line couples the mixing assembly with a source of turbid or contaminated water. A second line couples the mixing assembly and the settling assembly.

Abstract: System and method relates to measuring separation rate of water from water-in-crude oil emulsions at elevated temperature. The system includes an electrolytic interface (conductivity) cell comprising a plurality of capacitance/conductance probes disposed at different heights in a fluid stream disposed within the interface cell and an analyzer. Logic of the analyzer determines the separation rate based on signals received from the plurality of capacitance/conductance probes in the interface cell that are coupled to monitor the fluid stream. Methods for making and using the system are also disclosed.

Abstract: Sensing level of submerged solids. At least some of the example embodiments are methods including: inserting a level sensing apparatus through an aperture at a top of a reservoir such that a bottom end of an inner tube abuts an upper surface of the submerged solids in the reservoir; utilizing the submerged solids such that the upper surface of the submerged solids recedes and the level sensing apparatus moves downward with the receding upper surface of the submerged solids; constraining downward movement of an outer tube when the upper surface of the submerged solids reaches a predetermined low level; and as the upper surface of the submerged solids continues to recede, sensing relative movement of the outer tube and an inner tube as an indication that the upper surface of the submerged solids is below the predetermined low level.

Abstract: Embodiments provide systems and methods for releasing grey water from an aircraft sink or sump using an improved waste water air stop valve. The valves described herein allow drainage of waste water, without air leakage. Additionally, if drainage in the piping is blocked, the valves are designed to ensure that water cannot flow back into the sinks or sumps.

Abstract: A filter element (10) has a filter bellows (12) arranged about the longitudinal axis (L) and having a first end disk (14) on a first end face (26), and a second end disk (16) on a second end face (28). A central element (20) is arranged rotatably about the longitudinal axis (L) relative to the filter bellows (12) in the interior (18) of the filter bellows (12). The central element (20) has one or multiple positioning elements (22, 24) which interact with counter positioning elements (116, 118) of an upper housing part (114) to fix the central element in the upper housing part (114) in a defined angular position. The central element (20) has at least one electrical connector element (32) on the element, electrically contacting at least one electrical connector element (120) on the housing.

Abstract: An apparatus including a screen capable of separating solids from a liquid-solid mixture and a first probe disposed beneath the screen. The first probe is provided to determine a position of a beach between the liquid-solid mixture and separated solids. The apparatus may measure a property of a local volume of a probe disposed beneath a first separator deck. The probe may then send a first signal to database. Based on the signal a location of a beach may be determined.

Abstract: A microvalve includes a first plate having a surface, a recessed region provided within the surface, a fluid port provided within the recessed region, and a sealing structure extending about the fluid port. A second plate defines a non-movable portion and a movable portion, a surface of the non-movable portion abutting the surface of the first plate, the non-movable portion having first and second openings formed therethrough. The movable portion is formed within the first opening and has an axis, the movable portion defining a displaceable member connected to the non-movable portion by a convoluted spring formed in a second opening.

Abstract: An implantable catheter is provided that may be disinfected without removal from the body of a patient, using an electrochemical method to generate an electric field on the catheter surface and thus destroy microorganisms in a biofilm that is present or forming. A catheter system includes the implantable catheter and a voltage source that is operably connected to electrodes on or embedded in the exterior and optionally the interior catheter surface. Methods are also provided for disinfecting the implantable catheter in vivo and for detecting or confirming the presence of a pathogenic biofilm thereon.

Abstract: A liquid treating device includes a liquid guide cylinder having liquid suction and ejection ports, a liquid supply unit that supplies liquid to the liquid suction port, a pumping-up unit that is provided within the liquid guide cylinder and suctions liquid from the liquid suction port and ejecting liquid from the liquid ejection port, a liquid ejection space part that enlarges liquid, which has been ejected from the liquid ejection port by the pumping-up unit, in an upper part of a closed tank, a gas supply unit that supplies gas in the liquid ejection space part under pressure, a reflux passage that circulates liquid from the liquid ejection space part through space between the tank and the liquid guide cylinder to a lower part of the liquid guide cylinder, and treated liquid taking-out piping that takes out treated liquid from a lower part of the tank to an exterior.

Abstract: A particle counter and classification system including an imaging subsystem configured to determine the size and morphology of particles above a predetermined size in a fluid in a sample cell. A first stage magnetometer sensor subsystem is tuned to detect and determine the size of ferrous and/or conducting particles. An optional second stage magnetometer sensor subsystem is tuned to detect the overall ferrous particle content of the fluid. A processor subsystem is configured to calculate and report the number of particles in the fluid in a plurality of size ranges, their morphology, their classification as a particular particle type according to their characteristic morphology, the number of ferrous and/or conducting particles, and the overall ferrous content of the fluid.

Abstract: A fuel pump is disclosed. The fuel pump includes a housing. Further, the fuel pump includes a rotatable pump shaft disposed within the housing. One end of the rotatable pump shaft is attachable to a gear. The housing also includes a retainer disposed within the housing and located about the pump shaft. The retainer includes a first rim and a second rim that are spaced apart from each other. The retainer also includes a side wall extending between the first and the second rims. Further, the side wall of the retainer defines a first volume and a second volume within the housing. The side wall of the retainer has a plurality of apertures configured to allow a fluid flow from the first volume to the second volume while retaining particulate contaminants larger than a size of the apertures within the first volume.

Abstract: A filter includes an enclosure (10) and a filter core (20) mounted inside the enclosure (10). The filter core (20) includes a support (22) and a filtering element (24) entangled with the support (22). The enclosure (10) is of a spherical form and includes: a main body (12), an inlet passage (14) mounted to an upper portion of the main body (12), an outlet passage (16) mounted to a lower portion of the main body (12), and a ventilation tube (18) mounted to a top of the main body (12). The filtering element (24) is set in a spherically-shaped spiral so that the filter core (20) has reduced filtering areas at a top and a bottom ends thereof and an enlarged filtering area at a middle portion.

Abstract: There is described a fluid treatment system comprising: (i) a fluid inlet; (ii) a fluid outlet; and (iii) a fluid treatment zone in fluid communication with the fluid inlet and the fluid outlet. The fluid treatment zone comprises a housing within which is disposed a fluid separation section (the separation section may include a single separation device or a combination of two or more similar or dissimilar separation devices) and a fluid radiation section in fluid communication with one another. The fluid separation section removes solids in the fluid and the fluid radiation section irradiates the fluid to deactive microorganisms in the fluid. The fluid separation section and the fluid radiation section are configured to have a substantially common fluid flow path which significantly reduces the space or footprint requirement of and/or significantly reduces hydraulic head loss (pressure drops) in the overall fluid treatment system while allowing the two sections to perform their respective functions.

Abstract: An apparatus for digesting waste includes a digester tank, a drainage trough located near a top of the digester tank, an auger located inside the drainage trough, and a skimmer that pushes waste into the drainage trough.

Abstract: A water filter sand level sensor is positioned inside a water filter and detects if a sand level in the water filter is above or below a critical level. The sand level sensor is connected to an indicator outside the water filter that provides a visual or audible signal regarding the sand level in the water filter. The sand level sensor may be a light dependent resistor detecting light from a light emitting diode and having a resistance that decreases with increasing incident light intensity. The sand level sensor also may be an ultrasonic transducer transmitting ultrasonic energy bursts vertically down through the water filter to the sand level and determining a time difference between a transmitted and a reflected signal.

Abstract: An oil spill clean-up apparatus and method, and more specifically to a self-contained oil spill clean-up vessel with ice displacement capabilities. One preferred oil spill clean-up system includes a vessel subsystem, an ice displacement subsystem, and an oil spill skimming subsystem. Preferred oil spill clean-up systems may include at least one storage subsystem. Preferred oil spill clean-up systems may include an oil/water separation and removal subsystem.

Abstract: A drainage device for draining liquid out of a closed chamber includes an air cylinder, a driving assembly, a first channel, a second channel, a first sealing assembly, a second sealing assembly, and a controller. The air cylinder includes a main body defining a receiving chamber, an action piston positioned in the receiving chamber of the main body, and a connecting rod connected to the action piston. The main body defines a liquid inlet and a liquid outlet, both of which communicate with the receiving chamber, and the presence of a fixed piston with a seal in each of the inlet and outlet creates a double-acting one-way valve when the action piston is moved up and down.

Abstract: A drainage device for draining liquid out of a closed chamber includes a main body, a piston assembly, and a transmission assembly. The main body defines a receiving chamber and a liquid inlet communicating with the receiving chamber to the closed chamber. The piston assembly is fixed in the receiving chamber of the main body. The transmission assembly is partially received in the receiving chamber. The transmission assembly and the piston assembly cooperatively separate the receiving chamber to a first chamber adjacent to the liquid inlet and a second chamber away from the liquid inlet. The transmission assembly is slidably received in the receiving chamber, thereby causing air pressure differences between the first chamber and the second chamber, to pump the liquid from the closed chamber to the second chamber. The main body further defines a plurality of discharge holes for draining liquid out of the second chamber.

Abstract: A system for pumping cooking oil from a filtration device or cooking oil reservoir to a storage tank or back into the cooking oil reservoir. The system can also be used to pump oil from the storage tank to a disposal location. The system can include a pump used to pump oil from one location to another. The system can include a housing for containing the pump and/or the storage tank. The system can include a fresh oil storage tank.

Abstract: A cutting fluid filtering device having a filter washing function drives a pump to supply a cutting fluid to a filter when the fluid level of a tank that stores the cutting fluid filtered by the filter becomes equal to or lower than a predetermined height. In addition, the cutting fluid filtering device issues an instruction to execute washing of the filter when the operation times of the pump are totalized and the total value becomes equal to or longer than a preset washing operation interval time of the filter.