639 results about "Venturi effect" patented technology

Embodiments relate to a structure of reactors in a deposition device that enables efficient removal of excess material deposited on a substrate by using multiple-staged Venturi effect. In a reactor, constriction zones of different height are formed between injection chambers and an exhaust portion. As purge gas or precursor travels from injection chambers to the exhaust portion and passes the constriction zones, the pressure of the gas drops and the speed of the gas increase. Such changes in the pressure and speed facilitate removal of excess material deposited on the substrate.

The present invention provides for the integration of drug dispersion methods into a drug or medicine delivery system. The drug dispersion methods used include shear (e.g., air across a drug, with or without a gas assist), capillary flow or a venturi effect, mechanical means such as spinning, vibration, or impaction, and turbulence (e.g., using mesh screens, or restrictions in the air path). These methods of drug dispersion allow for all of the drug in the system to be released, allowing control of the dosage size. These methods also provide for drug metering, fluidization, entrainment, deaggragation and deagglomeration. The present invention also provides for the integration of a drug sealing system into the device. The drug sealing system provides a way of blocking the migration of drug from one area of the package to another. The drug seal system can also provide a method of tightly containing the drug until the package is opened, of directing airflow through the package and of managing and containing the drug during the package / device manufacturing process.

Microdermabrasion and suction massage apparatus are included in a single unit and alternatively connectable through a mode switch to a source of vacuum. The microdermabrasion section of the unit includes a crystal pick up station operating with a venturi effect to draw crystals through a hole into an air stream. The size of the hole is variable to control crystal density. A bleed valve is provided to control crystal velocity without controlling crystal density, while a bypass valve is provided to control crystal density without controlling crystal velocity. In an associated method, a microdermabrasion procedure is performed on the skin of a patient at an operative site. The mode switch is operated to activate the suction massage apparatus within the unit. This step is followed by performing a suction massage procedure at the operative site in order to promote healing of the abraded skin. The unit can be back-flushed by connecting various portions of the unit to a pressurized output of the source of vacuum.

A method of distributing particles in a flow of gas and a needleless syringe for use in the needleless injection of particles into the skin or mucosa of a vertebrate subject are disclosed. The syringe includes a convergence which reduces pressure of the gas flowing in the gas flow path due to the Venturi effect such that particles initially located outside of the gas flow path are drawn into the gas flow path under the action of the reduced pressure and become entrained in the gas. An exit nozzle accelerates the particles so entrained. In another aspect of the invention, there is provided a method of creating a gas flow in a needleless syringe which comprises flowing gas through a first convergence into a chamber to form a transsonic gas jet in the chamber and passing the gas jet from the chamber into a second convergence and along the nozzle.

A plenum (12, 60) having a plurality of heat fins (40, 72) and also a receptacle (20) for receiving a heat generating component (22) in a friction fit arrangement. The plenum has a plurality of passageways (14, 66) defined by the plurality of fins arranged in rows, and also includes a plurality of openings (50, 76) disposed between the fin. The receptacle frictionally receives a respective heat generating component (22), and wicks heat to the fins. Air communicating through the passageways defined by the fins removes heat from the fins, and also creates a venturi effect to remove heat from within a housing via the openings to further cool the portable electronic device.

The application relates to an apparatus for preparing food. The apparatus includes a housing (1), a food preparation chamber (4) in the housing (1) having an inner wall (5) defining a food receiving space (6) with an air entry aperture (10) and an air discharge aperture (13), a fan (14) for moving a flow of hot air successively through the air entry aperture (10), the food receiving space (6) and the air discharge aperture (13), and an air guide passage (7) for returning the flow of air from the air discharge aperture (13) towards the air entry aperture (10) separate from the food receiving space (6). The housing (1) comprising a cooling air channel (30) and a hot air vent (20) for exhausting the flow of hot air from the food preparation chamber (4) to outside the housing (1) with a constricted section (29) having a reduced cross-sectional area such that a venturi effect is generated in the hot air vent (20). An outlet (35) to the cooling air channel (30) communicates with the hot air vent (20) at the constricted section (29) such that a region of low pressure is formed at the outlet (35) and a flow of cooling air is drawn along the cooling air channel (30) and into the hot air vent (20).

The pulmonary oxygen flow control system delivers oxygen from a source of pressure to a nasal cannula worn by the patient. Between the source and the nasal cannula is a pendant flow structure which includes an orifice followed by a gas dynamic valve. When the downstream pressure in the cannula is high, the gas dynamic valve diverts the oxygen flow through the orifice to a flexible reservoir. Upon inhalation, the pressure at the cannula falls so that the gas dynamic valve delivers the orifice flow to the cannula and also utilizes a Venturi effect to withdraw oxygen from the reservoir and deliver it to the cannula. The cannula has nasal tubes which have angular faces and which are positioned farther into the nares to deliver the oxygen more efficiently.

A range hood with a smoke deflector, comprises a body, a smoke collecting cover and the smoke deflector, wherein an air inlet is arranged on the smoke collecting cover, the smoke deflector faces to the air inlet and be in the predetermined distance from the smoke collecting cover, thus a oil smoke channel through which the oil smoke can pass is formed between the smoke deflector and the smoke collecting cover, the range hood is characterized in that the distance between the smoke deflector corresponding to the oil smoke channel and the smoke collecting cover is gradually reduced from the periphery of the smoke deflector to the air inlet. Compared with the prior art, the invention has the advantages: the smoke deflector is used for forming the wall-attachment effect, the oil smoke flow uniformly without series flow, the distance between the smoke deflector and the smoke collecting cover is gradually reduced from the periphery of the smoke deflector to the air inlet, so that the Venturi effect is formed conveniently, thus accelerating the sucking of smoke by the blower fan.

A throttle body fuel injection system and method that is arranged to easily replace four-barrel carburetors includes a throttle body assembly with four main bores, each with a throttle plate and an associated fuel injector. Each injector feeds fuel into a circular fuel distribution ring via a fuel injection conduit, which introduces pressurized fuel into the air stream. The fuel distribution rings and bores have profiles that avoid constrictions for to prevent low pressure zones according to the Venturi effect. Fuel is injected through downward-facing outlets at or near the bottom end of the rings. The fuel injection rings are two-piece, each formed of an insert pressed into an outer housing. The insert includes axial grooves intervaled about its exterior circumference of insert that are joined by a circumferential groove formed about the insert. The grooves are in fluid communication with a conduit that supplies fuel from a fuel injector.

An automated mixing drink dispenser (10) establishes a preselected feed rate of concentrate from a concentrate hopper (42) and ratio of concentrate to mixing water fed into a mixing chamber (42) through the Venturi effect created by swirling water fed into a mixing chamber (42) at a preselected water pressure (66) and preselected regulated flow rate (68) associated with the preselected feed rate of the concentrate. Concentrate is fed to a mixing chamber (42) from a concentrate hopper (42) having an open drain hole (50) openly connected to the mixing chamber (42). A stirring mechanism (106, 100, 101, 102, 104) mechanically mixes the concentrate within the concentrate hopper (42) to maintain a uniform density and viscosity and a gas pressure mechanism (92, 94, 96, 86) maintains a uniform head pressure of concentrate to facilitate maintenance of the preselected concentrate flow rate over time. Nitrogen gas in air is pumped through a nitrogen passing filter to fill the space (90) above the concentrate to both maintain head pressure and to reduce deterioration of the concentrate due to interaction with oxygen.

An aerosol spray dispenser is disclosed that includes an outer housing that is circular, oval, or non-oval and in which an active composition to be dispensed is provided and a closure sleeve housing within the outer housing. An inner receptacle is provided within the closure sleeve housing and within the volume of the outer housing and contains a propellant to be dispensed. The inner housing may be concentrically located within the outer housing. An actuator assembly houses a nozzle that has a venturi constriction. A tube extends within the outer housing to provide the passage of active composition from within the outer housing by the venturi effect. A conduit for the passage of a propellant from the inner receptacle to the nozzle is provided. The propellant and the active composition are mixed and dispensed as a spray at a nozzle by action of the venturi effect. Materials that are not compatible with the active composition can be added to the propellant and effectively mixed and dispensed, for example a fragrance that is incompatible with hypochlorite or one component or a two part hardening composition.

Gas burner (101) for cookers, of the type fitted to a cooking hob (2), comprising a central body (3) having a first ring of flames (4) and at least one external body (107), fluidly separated from said central body and substantially concentric with it (3), having at least one second (circumferential) ring of flames (9, 10), as well as means for separately feeding the mixture of primary air and gas to the central body and to the external body. These means for feeding the external body comprise at least one horizontal mixing chamber with a radial Venturi effect (11, 12, 13, 14).

Microdermabrasion and suction massage apparatus are included in a single unit and alternatively connectable through a mode switch to a source of vacuum. The microdermabrasion section of the unit includes a crystal pick up station operating with a venturi effect to draw crystals through a hole into an air stream. The size of the hole is variable to control crystal density. A bleed valve is provided to control crystal velocity without controlling crystal density, while a bypass valve is provided to control crystal density without controlling crystal velocity. In an associated method, a microdermabrasion procedure is performed on the skin of a patient at an operative site. The mode switch is operated to activate the suction massage apparatus within the unit. This step is followed by performing a suction massage procedure at the operative site in order to promote healing of the abraded skin. The unit can be back flushed by connecting various portions of the unit to a pressurized output of the source of vacuum.

A package for a portion of liquid foodstuff dilutable with a diluent, which package comprises a reservoir (10) for containing a portion of liquid foodstuff dilutable with a diluent, which reservoir has a filling aperture, a reservoir seal (13) for closing the reservoir, a mixing element (30) for mixing the dilutable liquid foodstuff with the diluent, which mixing element comprises a mixing chamber (34), which mixing chamber has an outflow aperture (36) for dispensing liquid foodstuff diluted with the diluent, a liquid passage for feeding dilutable liquid foodstuff from the reservoir to the mixing chamber, a feed channel (31) for feeding diluent to the mixing chamber, which feed channel has a first portion (32) and a second portion (33), the second portion having an outflow aperture which opens into the mixing chamber, and the cross section of the second portion being smaller than the cross section of the first portion and the cross section of the mixing chamber to such an extent that when diluent is fed to the mixing chamber a venturi effect occurs in the mixing chamber.

An apparatus for use with a reactor for synthesis of nanostructures is provided. The apparatus includes a chamber having one end in fluid communication with the reactor and defining a pathway along which a fluid mixture for the synthesis of nanostructures can be injected into the reactor. The apparatus also has a tube in fluid communication with an opposite of the chamber to impart a venturi effect in order to generate from the fluid mixture small droplets prior to introducing the fluid mixture into the chamber. A heating zone is situated downstream from the tube to provide a temperature range sufficient to permit the formation, from components within the fluid mixture, of catalyst particles upon which nanostructures can be generated. A mechanism is further provided at a distal end of the chamber to minimize turbulent flow as the fluid mixture exits the chamber, and to impart a substantially laminar flow thereto. A method for synthesis of nanostructures is also provided.

The invention discloses a washing method and a washing machine for adding detergents automatically under negative pressure. The washing machine comprises a water inlet, a detergent container and a washing barrel, wherein two water inlet channels are formed between the water inlet and the washing barrel, namely a main water inlet channel and a water cleaning channel; a constant volume container is arranged between the water cleaning channel and the washing barrel, and is communicated with the detergent container; a Venturi tube is arranged in the main water inlet channel; thick main water inlet flow is changed to thin main water inlet flow by utilizing the principle of a Venturi effect, and the water inlet flow speed is accelerated, so that a relative vacuum area is formed on the rear side of an outlet of the Venturi tube; and the relative vacuum area is communicated with the constant volume container, so that the constant volume container pumps the detergents in the detergent container communicated with the constant volume container to constant volume container under the negative pressure. By the washing method, the proper amount of detergents are added automatically under the negative pressure generated by the water flow on the premise that the washing effect is not influenced, the structure is simple, and the washing efficiency is improved.

A pulsed combustion device includes a support structure and a combustor carousel supported by the support structure and rotating relative thereto about an axis. The carousel has a number of combustion conduits in a circumferential array. Each conduit cyclically receives a charge and discharges combustion products of the charge. A venturi effect may help control fuel / air charge leakage from a flowpath spanning the carousel and a stationary manifold.

The invention discloses a novel cigarette for heating a non-combustible tobacco. The cigarette comprises a reversal counter-sunk filter stick (1), a first hollow filter stick (2a), a second hollow filter stick (2b) and a tobacco stick (3), wherein the reversal counter-sunk filter stick (1) comprises a filter section (1a) and a hollow section (1b); the first hollow filter stick (2a) is provided with a first axial cavity (22a); the second hollow filter stick (2b) is provided with a second axial cavity (22b); the equivalent diameter of the second axial cavity (22b) is greater than equivalent diameter of the first axial cavity (22a); and the equivalent diameter of the second axial cavity (22b) is less than the diameter of the hollow section (1b). The novel cigarette provided by the invention can be used for reducing smoke temperature on the basis of a Venturi effect; and the cigarette is sufficient in smodke amount, high in smoke release speed and high in smoking times.

A device that converts wave energy to electrical or chemical energy includes a buoy adapted to float on a water surface, a venturi tube, and a rigid or flexible means of connecting the buoy and the venturi tube. The venturi tube defines a lumen through which water flows downwardly when the buoy moves upwardly and upwardly when the buoy moves downwardly. A constriction is formed in the lumen to create a venturi effect for water flowing upwardly and downwardly through the lumen. A turbine is positioned in the lumen at the constriction where water flow is at a maximum rate. The turbine is connected to a generator so that the venturi effect is harnessed to generate power. Multiple embodiments are included.

A vehicle has a frame with a body including a front and roof. The vehicle includes an electric motor energized by a battery pack, containing batteries, and connected to a battery charger / regulator. A driveshaft operatively connected to and driven by the motor propels the wheels of the vehicle. The vehicle further includes at least a pair of venturi effect air nozzle windstream accelerators comprising the design of the front of the vehicle, the front of the vehicle being wedge-shaped, having a sharp edge, generally horizontal and close to the surface or road upon which the vehicle travels, the front sloping backward and upward to the roof of the vehicle, thereby scooping up the horizontal headwind column of air developed upon vehicle movement. The accelerators further include at least a pair of venturi effect structures mounted on the roof, each containing a wind-electric generator, operatively connected to the battery charger / regulator.

An air handling system for a building having a ceiling and enclosed space, the system including four interconnected induction units for mounting adjacent the ceiling. These units form four sides of a rectangular assembly. Each induction unit includes an air plenum section and an air mixing section connected to a side of the air plenum section and forming an elongate air mixing chamber that extends downwardly to an air outlet. Supporting members mount the induction unit assembly at the ceiling so that each air mixing section when viewed in transverse, vertical cross-section extends at a substantial angle, which in a preferred embodiment is about 90 degrees, to the ceiling during use of the apparatus. Return air is drawn by venturi effect created by a fast flow of primary air into each air mixing chamber and heated or cooled at the heat exchanging coils. The units can provide a mixed air flow that flows downwardly from the outlets.

A closed air handling system for heating and / or cooling has an integrated damper mechanism for diverting discharge air into the attic or crawl space of a house, apartment, or other building, and for facilitating the introduction of fresh air into such building. Optionally, the damper has integrated louvers for use during an open position such that a venturi effect increases airflow by creating a vacuum between the louvers and the ducts connected to the discharge plenum.

The invention relates to an eye protection mask for the practice of outdoor sports, the mask including an eye protection lens, a peripheral frame to which the lens is fixed, the frame demarcating an opening closed by the lens, the frame having an orifice opening out at the rear of the shield and to the outside, a lateral deflector fixed to the frame opposite the orifice so as to channel a flow of air coming from the front of the mask to form an air flow tangentially to the orifice, such that the airflow formed creates a depression by venturi effect in the area of the outer inlet of the orifice.

An apparatus for delivering anaesthetic to human or animal patients. The apparatus is an anaesthetic machine which is arranged to mount components of an anaesthetic delivery circuit, and which includes a collector arrangement in the form of a manifold having a plurality of inlets and outlets. The manifold enables a reduction in the number of tubes connecting the various components in an anaesthetic system, which are normally required in prior art anaesthetic machines. The manifold also includes an arrangement which provides a Venturi effect on gas flow, and enables a pressure gauge to be mounted out of a patient breathing circuit. The machine is preferably portable.

An arrangement for mixing a first and a second gas flow, for example, an inlet flow with a exhaust gas return flow in a diesel engine, comprising a line (16) for the first flow, an inlet (7) for the second flow in the line (16), in order to achieve the mixing; a streamlined body (8) arranged to be displaced in the longitudinal direction of the line (16) at the inlet (7) in order to achieve a variable venturi effect and in this way a variable suction effect and mixture of the mixed flow; and actuating means for displacing the body forwards and backwards in the line. In order to minimise the need for throttling and the accompanying pressure losses, the streamlined body (8) and the supply part (2) are designed to achieve maximal throttling in the line (16) close to the inlet (7), independently of the position of the body.

The first flow-restriction vertical bead narrowing the coolant flow is provided to increase the flow speed at this portion. The coolant passage opens at the flow-in area between the exhaust ports. Thereby, the flow speed of the coolant at this area is increased, so the coolant in the coolant passage can be properly sucked due to the Venturi effect. As a result, the cooling function can be improved.

A LED lamp (1) having an air-cooled heat sink (6) enclosed in a a housing (2) having a front section (3) and a rear section (4) that holds at least one LED (5) connected to the heat sink. A plurality of cooling vanes (7) extend from the heat sink and heat generated by the at least one LED travels through the heat sink and then through the cooling vanes. The cooling vanes create additional surface area for air to come into contact with, thereby allowing more efficient cooling of the at least one LED. Cooling channels (8) located between the cooling vanes allow for air flow between the cooling vanes. Further, the cooling vanes are angled so that a venturi effect is created as a fan (13) pulls air through the cooling channels, thereby increasing the airflow across the cooling vanes.