110 results about "Outflow rate" patented technology

The present invention provides a system and a method for distending a body tissue cavity of a subject by continuous flow irrigation such that minimal or negligible fluid turbulence is present inside the cavity, such that any desired cavity pressure can be created and maintained for any desired outflow rate. The present invention also provides a method for accurately determining the rate of fluid loss, into the subject's body system, during any endoscopic procedure without utilizing any deficit weight or fluid volume calculation or flow rate sensor. The system and the methods of the present invention described above can be used in any endoscopic procedure requiring continuous flow irrigation few examples of such endoscopic procedures being hysteroscopic surgery, arthroscopic surgery, trans uretheral surgery, endoscopic surgery of the brain and endoscopic surgery of the spine.

A system to minimize fluid turbulence inside a tissue cavity during endoscopic procedures. A body tissue cavity of a subject is distended by continuous flow irrigation using a solenoid operated pump on the inflow side and a positive displacement pump, such as a peristaltic pump, on the outflow side, such that the amplitude of the pressure pulsations created by the outflow positive displacement pump inside the said tissue cavity is substantially dampened to almost negligible levels. The present invention also provides a method for accurately determining the rate of fluid loss into the subject's body system during any endoscopic procedure without utilizing any deficit weight or fluid volume calculation, the same being accomplished by using two fluid flow rate sensors. The present invention also provides a system of creating and maintaining any desired pressure in a body tissue cavity for any desired cavity outflow rate.

The present invention provides a system and a method for distending a body tissue cavity of a subject by continuous flow irrigation by using two positive displacement pumps, such as peristaltic pumps, one pump on the inflow side and another pump on the outflow side, such that the amplitude of the pressure pulsations created by a the said positive displacement pumps inside the tissue cavity is substantially dampened to almost negligible levels. The present invention also provides a method of reducing the frequency of the said pressure pulsations. The present invention also provides a method for accurately determining the rate of fluid loss, into the subject's body system, during any endoscopic procedure without utilizing any deficit weight or fluid volume calculation, the same being accomplished by using two fluid flow rate sensors. The present invention also provides a system of creating and maintaining any desired pressure in a body tissue cavity for any desired cavity outflow rate. The system and the methods of the present invention described above can be used in any endoscopic procedure requiring continuous flow irrigation few examples of such endoscopic procedures being hysteroscopic surgery, arthroscopic surgery, trans uretheral surgery, endoscopic surgery of the brain and endoscopic surgery of the spine.

The present invention provides a system and a method for distending a body tissue cavity of a subject by continuous flow irrigation by using a dynamic pump, such as a centrifugal pump, on the inflow side and a positive displacement pump, such as a peristaltic pump, on the outflow side, such that the amplitude of the pressure pulsations created by a the said outflow positive displacement pump inside the said tissue cavity is substantially dampened to almost negligible levels. The present invention also provides a method for accurately determining the rate of fluid loss, into the subject's body system, during any endoscopic procedure without utilizing any deficit weight or fluid volume calculation, the same being accomplished by using two fluid flow rate sensors. The present invention also provides a system of creating and maintaining any desired pressure in a body tissue cavity for any desired cavity outflow rate. The system and the methods of the present invention described above can be used in any endoscopic procedure requiring continuous flow irrigation few examples of such endoscopic procedures being hysteroscopic surgery, arthroscopic surgery, trans uretheral surgery, endoscopic surgery of the brain and endoscopic surgery of the spine.

By removing material of low permeability from within and around a perforation tunnel and creating at least one fracture at the tip of a perforation tunnel, injection parameters and effects such as outflow rate and, in the case of multiple perforation tunnels benefiting from such cleanup, distribution of injected fluids along a wellbore are enhanced. Following detonation of a charge carrier, a second explosive event is triggered within a freshly made tunnel, thereby substantially eliminating a crushed zone and improving the geometry and quality (and length) of the tunnel. In addition, this action creates substantially debris-free tunnels and relieves the residual stress cage, resulting in perforation tunnels that are highly conducive to injection under fracturing conditions for disposal and stimulation purposes, and that promote even coverage of injected fluids across the perforated interval.

A multi-dimensional liquid analysis system includes a flow splitter for separating mobile phase outflow from a first dimension liquid analysis system into first and second liquid split outlet flows. Volumetric flow rate control of the split outlet flows is provided by a flow control pump which withdraws one of the split outlet flows from the flow splitter at a controlled withdrawal flow rate to define the other split outlet flow rate as the difference between the outflow rate from the first dimension system and the withdrawal flow rate. In this manner, accurate and consistent flow division can be accomplished, which is particularly useful for multi-dimensional liquid analysis.

An iron (1), comprising: —a water reservoir (16), configured to hold liquid water; —a heatable soleplate (20); —at least one water outlet opening (24); —a water atomization and distribution unit (30), configured to atomize water from the water reservoir and to distribute the atomized water to the at least one water outlet opening; —at least one sensor (40,42), configured to monitor at least one motion dependent variable of the iron and to generate a reference signal reflecting said variable; —a control unit (50), operatively connected to both the water atomization and distribution unit (30) and the at least one sensor (40, 42), and configured to control a water outflow rate of the at least one water outlet opening (24) by controlling the operation of the water atomization and distribution unit in dependence of the reference signal generated by the at least one sensor.

Provided is a precision variable flow rate infusion system and method for delivering a liquid from a reservoir having an initial potential outflow rate to a patient. The system includes at least a first flexible flow rate tubing having a pre-defined flow rate selected at a maximum dosage flow rate for the liquid from the reservoir, the pre-defined flow rate being less than the initial potential outflow rate of the reservoir. Also provided is an adjustable flow rate controller having an inlet and an outlet, at least one internal fluid pathway there between and a fluid pathway modifier structured and arranged to modify the internal fluid pathway from the inlet to the outlet from a closed pathway to a maximum flow pathway with a plurality of different flow rate pathways there between. Moreover, the at least first flexible flow rate tubing and adjustable flow rate controller determine the maximum flow rate of liquid from the reservoir to a patient and the adjustable flow rate controller permits precision flow rate control from an off flow rate to about the maximum flow rate permitted. Associated methods of providing, calibrating and using the precision variable flow rate infusion system are also provided.

An outflow rate regulator system for use in a phacoemulsification system to prevent the anterior chamber collapses that occur after occlusion breaks caused by fluid surges in the aspiration line. The outflow rate regulator system consisting in a flow limiting device installed in the aspiration line capable of varying the section or the extension of a fluid passage as a function of the pressure difference across the outflow rate regulator access and exit sides. The device is designed to reduce the outflow fluid passage area as a function of an increasing pressure difference across the outflow rate regulator. Alternatively, the effective extension of a narrow fluid passage is designed to increase as the pressure difference across the outflow rate regulator increases. Resistance to flow is increased with increasing pressure differences across the device in reversible manner. Clogging of the narrow fluid passages is avoided by upstream removal of solid particles above a determined size by a retaining filter.

A demister apparatus for machine tools having an enclosure booth for confining mist in which a varying outflow of air is drawn from the booth and directed to a remote demister apparatus from a minimum when the access doors to the enclosure are closed to a maximum when one or more of the doors are opened. The air flow may also be varied with the number of machine tools in operation as well with the state of filters in the remote demister apparatus. A cyclonic separator is also provided adjacent to the booth which functions well in a vertical up flow mode over a range of air outflow rates of flow.

The present invention provides a method involving at least one base station and at least one mobile unit is provided. The method includes receiving rate control information associated with at least one wireless communication channel between the at least one base station and the at least one mobile unit. The method also includes determining at least one outflow rate to the at least one base station based on the rate control information.

The invention discloses an evaluation device and an evaluation method for scale formation trend and scale inhibition effect. The principle is as follows: a sample is enabled to flow through a capillary with a constant pressure difference, and the scale formation trend of the sample is represented by the blockage condition of the capillary reflected by monitoring the attenuation of the flow rate of the sample in the capillary; and the scale inhibition performance of a physical measure and medicament is represented by a ratio of the accumulated outflow of a chemical or physical modified sample and the accumulated outflow of a bland sample under the same instantaneous outflow rate attenuating range. The evaluation device and the evaluation method for scale formation trend and scale inhibition effect are suitable for scale formation forecast of various liquid mediums in water treatment, petroleum exploitation, seawater desalination, petroleum processing and chemical production as well as scale inhibition performance evaluation and selection of various physical and chemical scale inhibition measures.

The invention provides a gas separation method and apparatus that can recover efficiently principal gas components from a feed gas that includes a plurality of components, and enables supplying the product gases continuously at a stable flow rate and component concentration. In the present invention, a first separation step using a first adsorption column and a second separation step using a second adsorption column are provided, a circulating feed gas, which is consisting of the recovered exhaust gases discharged in each of the steps and the feed gas, is used as a gas to be separated, the outflow rate and component concentration of a second gas product are maintained at a constant by controlling the outflow rate of the first gas product.

The invention relates to a paraxial powder-feeding working head for laser powder processing. The paraxial powder-feeding working head comprises a powder-gas separator, a powder-gas input chamber, a fast-plug connector, a powder collecting chamber, a first powder conveying tube, a processing gas input chamber, a processing gas collecting piece, a processing gas input joint, a fixed frame, a second powder conveying tube, a third powder conveying tube and a powder spray nozzle, wherein the processing gas collecting piece is a gradual-contraction funnel shaped component; a throttle valve is used for outputting a powder-carrying gas input by a powder feeder; a stainless steel wire net is arranged at the front end of the throttle valve. According to the paraxial powder-feeding working head disclosed by the invention, separation of metal powder and conveyed powder-carrying gas is realized, so that on one hand, outflow rate of the metal powder from the spray nozzle is lowered to ensure stability of powder conveying amount, and therefore, stable powder output amount requirements in laser powder processing processes of laser cladding, and the like are satisfied; on the other hand, a gas different from the powder-carrying gas is input from the processing gas input joint to achieve a purpose of protecting a processing piece; meanwhile, powder spraying speed of the powder feeding spray nozzle can be adjusted in an assisted manner, so that processing effect is controlled better.

The invention provides a polymer sand consolidating agent and a preparation method thereof. The polymer sand consolidating agent is prepared by compounding of 1%-5% of terpolymer, 0.5-2% of alcohol ether additive, 1%-5% of HCl serving as an initiator and 88%-97.5% of water or an acidizing system at the room temperature, wherein the terpolymer is composed of acrylamide or 2-acrylamido-2-methyl propanesulfonate, cationic monomer dimethyl diallyl ammonium chloride and double-bond organic silane coupling agent. The terpolymer can be independently prepared into a sand consolidating agent solution to be injected into stratums, the sand controlling rate is higher than 90%, the critical sand outflow rate is higher than 100mL/min, and the formation damage rate is smaller than 15%. The sand consolidating agent is high in compatibility with systems of hydrochloric acid, ammonium chloride, multi-hydrogen acid, fluoroboric acid and the like, thereby allowing addition into sandstone acidizing fluid to reduce after-acidization sand outflow risks so as to realize integration of sand control and yield increase.

The invention relates to a correction method for the grid outflow rate used for flood routing numerical calculation. The method comprises the steps of correcting negative water depth grids through correction factors so as obtain the actual water depth of the grid. The method solves the technical problems that in the traditional moving boundary calculation, the condition that the water surface elevation is lower than the ground level often occurs, namely, calculated water depth becomes negative value, and a negative water depth grid appears, consequently, the constancy of the mass in a calculation domain can not be ensured, stability becomes poor, even calculation is scattered and a result can not be obtained, and the flood routing numerical calculation is influenced to be incapable of being conducted smoothly. The correction factor lambda is introduced, so that when the water surface elevation is lower than the ground level, the flood routing numerical simulation calculation has been conducted smoothly.

The invention relates to a traffic signal control technology and aims to provide a traffic signal control method in urban traffic management. The method comprises the steps of: judging crowding conditions through a loop detector, and triggering demand control if traffic intensity parameters and inflow and outflow rate parameters reach the preset threshold values; screening a reasonable path from each node to crowded section according to a road network topological structure, and obtaining a demand control phase; and calculating an inflow and outflow rate of the crowded section, and determining a compression ratio of the demand control phase. According to traffic signal control method, few data is required, only flow data and occupancy data are required, and the method is low in dependency of the road network topological structure and suitable for a road network with any topological structure. The traffic demand is controlled, so that the traffic flow entering the crowded section is equal to traffic flow pulling out, and the phenomenon that the traffic state of the road section is not worsened can be fundamentally ensured.