54 results about "Fluid restriction" patented technology

A valved connector for controlling the flow of fluid having a valve assembly positioned within a connector housing having a first position wherein the valve assembly prevents fluid flow through the connector housing, and a second position wherein the valve assembly permits fluid flow through the connector housing. The valve assembly may be movable from the first position to the second position by a male luer fitting. The valve assembly is configured for multiple and repeated access and also for minimizing fluid flow restrictions. The valved connector may be designed for use with a catheter to provide for “over the guidewire” placement or replacement techniques with little or no bleed-back or air embolism.

A replaceable fluid restriction mechanism includes: an aperture residing adjacent to a fluid pathway connection and configured to permit flow of a drug fluid through the aperture when the fluid pathway connection is open; an entry point of a fluid channel configured such that the flow of drug fluid can travel through aperture to the entry point and through the fluid channel to an exit point; and an outlet aperture of a port through which the flow of drug fluid may travel after exiting the exit point, wherein a fluid conduit is connected to the fluid restriction mechanism at the outlet aperture. A configurable fluid restriction mechanism includes a plurality of fluid channels, selectable to align with the entry point and an exit point of the fluid restriction mechanism.

A pressure release encoding system for communicating downhole information through a wellbore to a surface location has a valve for providing a fluid restriction to fluid passing in the wellbore, a sensor positioned in the wellbore for sensing a downhole condition in the wellbore, an actuator cooperative with the valve for moving the valve between at least two positions in timed relation to the downhole condition sensed by the sensor, and a detector positioned at the surface location for providing a measurement value at the surface location correlative to the time between the changes of the pressure of the fluid in the wellbore. The sensor is an inclination sensor for sensing an angle of inclination of a drill bit in the wellbore.

An anchor module has an inner mandrel having a through bore, a slips device, upper and lower slips supports, and a spring device radially outside of the inner mandrel. The slips device is biased to a run state. A fluid actuation system counteracts the biasing force and includes a lower piston axially displaceable within a lower fluid chamber, an upper piston axially displaceable within an upper fluid chamber, and a fluid restriction provided in the bore. A lower fluid line is provided between the bore and the lower fluid chamber. The upper and lower pistons are connected to the lower slips device. An upper fluid line is between the bore and the upper fluid chamber. A cross sectional area of the fluid bore at the entrance of the upper fluid line smaller than the cross sectional area of the fluid bore at the entrance of the lower fluid line.

The invention provides a fluid restriction mechanism for an immersion lithography machine. The fluid restriction mechanism for an immersion lithography machine is characterized in that an immersion fluid sealing device is arranged in an original fluid restriction mechanism, the immersion fluid sealing device outward blows gas through an opening, an air jet is formed between the fluid restriction mechanism and a projection objective, and an air curtain for blocking contact of extraneous air with a free liquid level is formed above the free liquid level, so the influence of the contact of the immersion fluid with the extraneous air on the exposure quality of the immersion lithography machine is prevented.

The invention provides a high-strength atomization assembly which comprises a support shell, a heating body, a liquid guide body and a cover body, the support shell is provided with a first opening and a second opening, the first opening is communicated with the second opening, at least part of the heating body is embedded into the support shell and combined with the support shell, and a containing bin opened from the first opening is defined by the heating body and the support shell; the liquid guide body is arranged in the accommodating bin; and the cover body is arranged at the first opening so as to limit the liquid guiding body in the containing bin. The invention further provides an atomization device which comprises the atomization assembly. The support shell of the high-strength atomization assembly supports the heating body, the strength of the heating body is greatly improved, and the heating body is not prone to deformation; and the support shell, the heating body and the cover body can well limit the liquid guide body in the containing bin, so that the liquid guide body is in full contact with the heating body.

The present invention comprises a self-cleaning condensate drain fluid pressure trap for air conditioning. Particulates present in the air which pass through an air conditioner adhere to moister (condensation) which is present on the internal evaporator coil. Condensation drips off the evaporator coil along with the particulates which has mixed in with it. Air-conditioning condensate fluid and particulates, or debris, accumulate inside an air-conditioner evaporator coil drain pan and are drained outward through the condensate fluid drain opening. Condensate fluid pressure traps, necessary accessories of a condensate drain line, are normally secured to the drain pan right outside of the air conditioners drain opening. Since condensate fluid is slow flowing, and not pressurized, debris that drains out of the air conditioner tends to settle in the bottom of the condensate fluid pressure trap. The debris will build up until a clog or restriction to drainage flow occurs. This description of events is based on my experience as an HVAC service technician and from cases gathered from other HVAC professionals.This device, a self-cleaning condensate drain pressure trap for air conditioning, can prevent air conditioning condensate drain pan fluid overflows due to debris restrictions which occur in the condensate drain fluid pressure trap or elsewhere in the condensate drain line. In preferred embodiments a printed circuit board (PCB) is an incorporated part in the self-cleaning condensate drain pressure trap assembly. The PCB is designed to sense condensate fluid in the sensor cap at the high level of section 1a of the fluid pressure trap. Once the positive presence of fluid is sensed a relay on the PCB breaks the control voltage to the air-conditioners controls or thermostat. The invention then utilizes the incorporated fluid pump to circulate condensate drain fluid from section 1a of the pressure trap into section 1b of the pressure trap in a manner which is perpendicular to the normal fluid drainage flow through the fluid trap. This fluid pumping action loosens debris in section 1b and allows the drain fluid accumulated in the drain pan of the A / C unit to push the debris restriction out of the pressure trap by kinetic gravitational fluid force. After the debris is broken down and pushed through the fluid trap condensate drainage will resume. Unless there is another fluid restriction elsewhere in the drain line. When the PCB senses a negative presence of fluid at the sensor cap air-conditioner operations will be restored. If fluid drainage restrictions persist and a positive fluid presence at the sensor cap continues the PCB will continue to prevent the air conditioners operations. This will halt further production of condensate fluid to prevent condensate drain pan fluid overflow.The (self-cleaning condensate drain pressure trap) is not intended to remedy all causes of condensate fluid drainage restriction. Nor is it designed to clean out the entire condensate drain line. The varied reasons for this this are listed in the ‘background of the invention’ section of this application. In short, problems that occur within condensate fluid drain lines are too varied in nature and the construction methods of said drain lines are vast as well. In my professional opinion, any attempt to solve all relative drainage issues with a single device is not practical. That is why this device merely intends to resolve condensate fluid drainage issues which occur due to the restriction of the condensate fluid through the condensate fluid pressure trap.A device like (The self-cleaning condensate drain pressure trap) has been designed for the purpose of cleaning out entire condensate drain lines. The related patent (U.S. PG-Pub 2014 / 0130529), is flawed in certain embodiments where it is to be used. The device requires additional fluid trapping and / or elaborate external piping for it to function as a cleaning tool. It will experience failure(s) and / or cause damages when applied in condensate drain lines where more than one air conditioners share a common drain line or where drain line sections are not properly secured. The reasoning for these failures is laid out in the ‘background of the invention’ part of this application, sections (0004 thru 0007). These observations are based on my professional HVAC experience and the conclusions gathered by interview of other HVAC professionals.Another patent (U.S. PG-PUB 2005 / 0138939) is shown to incorporate a fluid sensor, actuated by ‘electrode’. The patent in not unlike the engineered function of the PCB's fluid sensing ability described herein the (self-cleaning condensate drain pressure trap for air conditioning). However, it is laid out in the ‘background of the invention’ part of this application section (0012 & 0013) why the patent (U.S. PG-PUB 2005 / 0138939) is flawed in its design and is prone to failure. In short, the electrodes described therein are unshielded or unprotected from the moisture rich environment in which they are applied. This will cause failure of the device in a variety of manners from short cycling of the control systems to simple failure due to corrosion and / or retarded conductivity of the electrodes by surface contamination. The improved designs made herein the (self-cleaning condensate pressure trap for air-conditioning) are a method for fluid detection in condensate systems which functions in a superior manner. This method is a replacement to the use of fluid float controls and has been manufactured and tested to function in a superior manner as a fluid sensor. The sensor cap of (The self-cleaning condensate pressure trap for air-conditioning) is a fluid splash-guard for the wires, which are contained therein, that convey the presence of fluid to the PCB. The wires have a plastic coating as well to protect them from surface contamination. The sensor cap and wire designs were engineered after observations while testing fluid sensing models determined that these elements were required to ensure proper operation. These elements also enable the fluid sensing capabilities to continue in a prolonged state of usage in a moisture rich environment.Finally, the engineering of the device (self cleaning condensate drain pressure trap for air conditioning) was kept as ergonomic as possible with as little parts as were necessary to perform the functions listed herein. In particular embodiments the device is constructed with materials that allow it to be used in indoor as well outdoor application. The device is resistant to U.V. rays, high ambient temperatures, debris and moisture. The device is light weight and can be supported merely by connection to the condensate drain line. The Installation method of (self cleaning condensate drain pressure trap for air conditioning) is the same as standard condensate fluid pressure traps, apart from the control wiring which must be connected to the air conditioner for cleaning and safety functions. Although, the device will function as a condensate fluid pressure trap whether power is applied or not.

Various types of pressure regulating devices are disclosed to reduce a pressure gradient in a liquid supply system of a lithographic apparatus, the liquid supply system having a liquid confinement structure configured to at least partially confine a liquid between a projection system and a substrate table of the lithographic apparatus. A high pressure gradient may cause particulate contamination in the liquid supply system and / or liquid confinement structure. A pressure gradient can be reduced by, for example, the use of slow switching in one or more valves, a bleed flow around or through one or more valves, diversion of liquid to a drain rather than or in addition to switching a valve off, a pressure regulator or flow restrictor to prevent shock waves, and a buffer volume / damper to compensate for pressure fluctuation.

A valve arrangement comprising a valve housing, a pilot chamber, a main valve member and a control valve member. The main valve member is axially movably arranged in the valve housing and is arranged to restrict a main fluid flow. The control valve member is movable in an axial direction relative the main valve member in response to an actuating force acting on the control valve member. The control valve member is arranged to interact with the main valve member to define axially separated pilot and bypass fluid restrictions. The pilot restriction restricts a pilot fluid flow out from the pilot chamber. The bypass restriction restricts a bypass flow bypassing the main fluid flow. The bypass flow is separate from the pilot fluid flow. The pilot and bypass restrictions are adjustable in response to the actuating force, thereby allowing simultaneous adjustment of the pilot pressure and the bypass fluid flow.

A flow restriction nozzle (100) comprising an interior surface, an exterior surface, an inlet (103) at a first portion of the nozzle (100) for connection to a fluid source, and an outlet (106) at a second portion of the nozzle (100) for providing a fluid flow, connecting the interior surface to the exterior surface, wherein a portion of the interior surface tapers radially inwardly towards the second portion and the outlet (106) comprises an elongated aperture (106) formed in the interior surface extending at least partially along the tapered surface such that a portion of the fluid flow through the outlet (106) is directed radially outwardly.

A flow restriction nozzle (100) comprising an interior surface, an exterior surface, an inlet (103) at a first portion of the nozzle (100) for connection to a fluid source, and an outlet (106) at a second portion of the nozzle (100) for providing a fluid flow, connecting the interior surface to the exterior surface, wherein a portion of the interior surface tapers radially inwardly towards the second portion and the outlet (106) comprises an elongated aperture (106) formed in the interior surface extending at least partially along the tapered surface such that a portion of the fluid flow through the outlet (106) is directed radially outwardly.

A flow regulator device for an analytical circuit, characterised by comprising: a fluid restriction of defined characteristics related to the field of application of the analytical circuit, a direct-pressure regulator positioned upstream of said restriction, a back pressure regulator positioned downstream of said restriction.

A water-purifying cartridge (6) is provided with a case (7) inside which a purifying chamber (S2) for purifying water introduced therein and an additive-containing chamber (S1) for containing an additive (16) to be added to the introduced water are formed and which is provided with a first water-introducing opening (7a) for introducing the water into the additive-containing chamber (S1). The additive-containing chamber (S1) has formed therein an air-retaining region (Aa) and a water-submerged region (Aw). The air-retaining region (Aa) is located in the upper part of the additive-containing chamber and retains air, and the water-submerged region (Aw) is located below the air-retaining region and retains the introduced water. The additive (16) is submerged in the introduced water in the water-submerged region (Aw). The additive (16) is contained in the additive-containing chamber (S1) in the region thereof extending from a portion which becomes the water-submerged region (Aw) up to a portion which becomes the air-retaining region (Aa). A submerged-height-setting mechanism sets the submerged height of the water-submerged region (Aw) by setting the pressure of air retained in the air-retaining region (Aa). A cap (28) having formed therein a through-hole (28b) functioning as a fluid restriction for an air vent path is used as the submerged-height-setting mechanism.

A fluid treatment system includes: a liquid confinement structure configured to confine an immersion liquid to a space between at least a portion of the liquid confinement structure and a surface of a substrate, the liquid confinement structure having an aperture forming a passage therein for passage of a radiation beam to irradiate the surface of the substrate by passing through the immersion liquid; and a diagnostic tool configured to detect an abnormal condition in the fluid treatment system, the diagnostic tool comprising an acoustic system configured to measure acoustic characteristics of the liquid confinement structure and / or the immersion liquid, where the acoustic system comprises a transducer configured to emit an acoustic detection signal to and / or receive acoustic waves from the immersion liquid.

An air-operated pump, such as an air-operated diaphragm pump, includes a pump body, a process liquid pathway defined at least in part by the pump body, and an air pathway defined at least in part by the pump body, where the process liquid pathway and air pathway are fluidly separated from one another within the pump body. The pump further includes a leak detection and containment assembly integrated with the pump body and having a process liquid sensor configured to sense process liquid leaked from the process liquid pathway into the air pathway, and a shutoff valve communicatively coupled to the process liquid sensor and configured to close in response to the process liquid sensor sensing a process liquid leak to contain the leaked process liquid within the pump body and the assembly.

The present invention relates to an elastomeric keypad (1) having at least one key (3) comprising an elastomeric dome (41) defining a chamber (42) and provided inside with an activating means (43), an activation means (44) cooperating with said activation means (44), and at least one compensating channel (48) opening at said chamber (42) to enable for a flow of fluid from said chamber (42), while said elastomeric dome (41) collapses, and to said chamber (42), while said elastomeric dome (41) releases. In order to suppress the sound intensity of the pushup event, at least one of said compensating channels (48) comprises at least one valve arrangement (5) generating fluid restrictions while the fluid returns to said chamber (42). Preferably said valve arrangement (5) has a form of a Tesla Valve.

An assembly for frothing a fluid having an air channel with a controllable air valve and having a fluid channel with an air inlet emanation point in which the air channel emanates, a pump, a fluid restriction, a heater, and a valve assembly having a first state in which fluid is channeled to a fluid outlet of the fluid channel and a second state in which the fluid is diverted from the fluid channel to a second fluid outlet. A water supply channel is connected to the fluid channel. The assembly also includes a cleaning reservoir and a return channel that is connected to the second fluid outletof the valve assembly and that emanates in the cleaning reservoir. An electronic controller assembly is configured to control at least the pump, the heater, and the valve assembly, and to operate theassembly in a production mode and a cleaning mode.

A fluid handling system comprising a fluid handling structure configured to at least partly confine a liquid to an immersion space between a final element and a substrate, wherein the fluid handling structure comprises: a plurality of gas knife compartments and a plurality of gas supply compartments, wherein the flow of gas to each of the gas knife compartment and gas supply compartment is individually controllable by a respective variable flow valve.

Provided is a transmission device in which pinion and a large diameter gear each comprise a helical gear and are arranged such that an oil on a tooth surface is pushed from a mutual meshing portion to one side in an axial direction of the pinion during the forward rotation of the large diameter gear, and a fluid restriction wall configured to oppose the oil pushed from the meshing portion to the one side in the axial direction is arranged adjacent to an end face of teeth of the pinion on the one side in the axial direction, the fluid restriction wall being formed in a shape that allows a tooth tip portion of the end face to be covered.

Disclosed herein is a fluid processing system for a lithographic apparatus wherein the fluid processing system is configured to confine immersion fluid in a liquid confinement space between a portion of a projection system in the lithographic apparatus and a surface of a substrate, a fluid treatment system whereby a radiation beam projected from the projection system is able to illuminate the surface of the substrate by passing through the immersion fluid, the fluid treatment system comprising a meniscus control surface for controlling movement of a meniscus of the immersion fluid; wherein, in a first operating state, the meniscus control surface is configured to maintain a meniscus of the immersion fluid substantially stationary between the meniscus control surface and the surface of the substrate; and wherein, in a second operating state, the meniscus control surface is configured to allow the movement of the meniscus of the immersion fluid.

A needle tip shield may include a needle passageway that may receive a needle, a tip shield interior space that may receive a needle block, and a fluid restriction member. The fluid restriction member may be configured to restrict fluid leakage into and / or out of the needle tip shield. The fluid restriction member may be selected from the group consisting of: (1) a fluid impedance member located adjacent the needle passageway that may impede fluid from entering into the needle tip shield through the needle passageway; (2) a fluid retention member that may retain fluid within the tip shield interior space; and (3) an anti-splatter member that may inhibit fluid splatter when the needle block moves from an open position to a closed position within the tip shield interior space.

The tip shield can include a needle passage to receive the needle, a tip shield interior space to receive the needle guard, and a fluid restriction member. The fluid restriction member can be configured to restrict fluid leakage into and / or out of the needle tip shield. The fluid restriction member can be selected from the group consisting of: (1) a fluid impedance member disposed adjacent the needle passage that can impede fluid passage into the needle tip shield through the needle passage; (2) a fluid retention member that can retain fluid within the tip shield interior space; and (3) a splash guard that can prevent fluid splash when the needle guard is moved within the tip shield interior space from an open position to a closed position.

A needle tip shield may include a needle passageway that may receive a needle, a tip shield interior space that may receive a needle block, and a fluid restriction member. The fluid restriction member may be configured to restrict fluid leakage into and / or out of the needle tip shield. The fluid restriction member may be selected from the group consisting of: (1) a fluid impedance member located adjacent the needle passageway that may impede fluid from entering into the needle tip shield through the needle passageway; (2) a fluid retention member that may retain fluid within the tip shield interior space; and (3) an anti-splatter member that may inhibit fluid splatter when the needle block moves from an open position to a closed position within the tip shield interior space.

A water-purifying cartridge (6) is provided with a case (7) inside which a purifying chamber (S2) for purifying water introduced therein and an additive-containing chamber (S1) for containing an additive (16) to be added to the introduced water are formed and which is provided with a first water-introducing opening (7a) for introducing the water into the additive-containing chamber (S1). The additive-containing chamber (S1) has formed therein an air-retaining region (Aa) and a water-submerged region (Aw). The air-retaining region (Aa) is located in the upper part of the additive-containing chamber and retains air, and the water-submerged region (Aw) is located below the air-retaining region and retains the introduced water. The additive (16) is submerged in the introduced water in the water-submerged region (Aw). The additive (16) is contained in the additive-containing chamber (S1) in the region thereof extending from a portion which becomes the water-submerged region (Aw) up to a portion which becomes the air-retaining region (Aa). A submerged-height-setting mechanism sets the submerged height of the water-submerged region (Aw) by setting the pressure of air retained in the air-retaining region (Aa). A cap (28) having formed therein a through-hole (28b) functioning as a fluid restriction for an air vent path is used as the submerged-height-setting mechanism.

Disclosed are dressings for treating a tissue site with an instillation therapy, which can include a dressing having a first layer including a polymeric film having a plurality of fluid restrictions through the polymeric film and a second layer including a polymer having a plurality of apertures. The second layer is adjacent to the first layer. The dressing can include an adhesive layer on at least a portion of the first layer. Further, the dressing can include a third layer on the adhesive layer, the third layer being capable of being at least partially removed from the adhesive layer to expose a portion of the adhesive.

An immersion lithography apparatus controller configured to control a positioner to move a support table to follow an exposure route and to control a liquid confinement structure, the controller configured to: predict whether liquid will be lost from an immersion space during at least one motion of the route in which an edge of the object passes under an edge of the immersion space, and if liquid loss from the immersion space is predicted, modify the fluid flow such that a first fluid flow rate into or out of an opening at a leading edge of the liquid confinement structure is different to a second fluid flow rate into or out of an opening at a trailing edge of the liquid confinement structure during the motion of predicted liquid loss or a motion of the route subsequent to the motion of predicted liquid loss.

The application relates to composite dressings for improving granulation growth and reducing blistering by negative pressure therapy. Dressings for treating a tissue site with negative pressure are disclosed, which may include a dressing having at least three layers assembled in a stacked relationship. In one exemplary embodiment, the first membrane may include a non-porous material and a plurality of fluid confinement portions. A first manifold layer may be adjacent to the first film and may include a second transparent material film having bubbles and a manifold area. The first manifold layer may further include an aperture configured to allow fluid to pass through the second membrane. A second manifold layer may be adjacent to the first manifold layer and may include a foam having a contact area that is less than a manifold area of the first manifold layer.