524 results about "Suction flow" patented technology

A suction catheter system is described with a suction nozzle that can extend from a guide catheter of the like. The suction nozzle can be positioned by tracking the suction nozzle through a vessel while moving a proximal portion of the suction extension within the lumen of the guide catheter. A suction lumen extends from the proximal end of the guide catheter through at least part of the guide catheter central lumen and through the suction tip. Desirable suction flow can be established using the guide lumen to facilitate the suction. Also, a delivery catheter is described with an elastic tip that can track closely over a guidewire. The elastic tip of the delivery catheter can be expanded to provide for the delivery of medical devices past the tip.

The outer skin (100) of an aerodynamic body (40) has perforations (200) arranged in particular patterns in respective spanwise extending groups or bundles (250). Each perforation is preferably a micro-slot with a length of 100 to 3000 μm and a width of 50 to 250 μm. Air is sucked through the micro-slots from the boundary layer flowing over the outer skin, to achieve boundary layer control. In each bundle, the pattern, size, orientation, and other parameters of the micro-slots are designed to achieve mutual destructive interference of flow disturbances arising due to the suction, to minimize the excitation of flow instabilities in the boundary layer. Particularly, the spatial spectrum of the perforation pattern of a given bundle is essentially absent of significant energy at predetermined wavelengths of predetermined flow instabilities that otherwise appear in the boundary layer air flow. The aerodynamic body further includes supporting ribs (300) extending parallel to the perforation bundles (250) and a perforated inner plate (400) providing a throttling control of the suction flow through groups of the bundles.

The invention relates to a portable hard surface vacuum (10) comprising a suction nozzle (45) and a suction unit (16), which is in fluid connection with the suction nozzle, for vacuuming a liquid-air mixture from a hard surface, and comprising a separating device (40, 57) for separating liquid from the liquid-air mixture and comprising a waste liquid tank (23) for receiving the separated liquid. In order to refine the hard surface vacuum in such a way that a constant suction flow is provided, regardless of the fill level of the waste liquid tank, and such that operation in an arbitrary orientation in relation to the vertical position can be carried out, a separating chamber (33) is arranged between the suction nozzle and the suction unit, said chamber housing the separating unit and being in fluid connection via a suction line (47) to the suction port (48) of the suction nozzle and in fluid connection to the suction unit via a suction line (60), and said chamber being connected via an outlet opening (67) to the waste liquid tank, wherein the port regions (51, 61) of the suction (47) and vacuum line within the separating chamber are surrounded at least partially by intermediate storage regions (71, 72, 73) for separated liquid in the circumferential direction.

A system for producing hydrocarbon fluids from a subsea formation includes at least one producing well penetrating the formation for producing hydrocarbon fluids. At least one dummy well is hydraulically connected to the at least one producing well for routing the hydrocarbon fluids from the producing well to the dummy well. At least one pump is disposed in the at least one dummy well. The pump takes suction flow from the dummy well and boosts the flow energy of the discharge flow of hydrocarbon fluids.

A cyclone dust-collecting apparatus is provided. The dust-collecting apparatus is detachably mounted in a main cleaner body of a vacuum cleaner and disposed on a suction flow path extending from a suction port body to a suction source. The dust-collecting apparatus includes a body having an opened lower portion; at least one cyclone unit disposed to one side in the body to separate dust from air flowing into the body and discharge air from which the dust has been separated; and a bottom cover to open or close the lower portion of the body. The body has an inflow pipe penetrating the body from a rear portion of the body and connected to the cyclone unit and the inflow pipe has an inclined top surface.

Systems and methods are provided for engine systems including a vacuum-powered multiple tap aspirator coupled between atmospheric, an engine crankcase, or another source and a vacuum source such as a compressor inlet or engine intake manifold. The multiple tap aspirator includes a suction tap arranged in a throat of the aspirator, a suction tap arranged in a diverging cone of the aspirator, and a suction tap arranged in a straight exit tube downstream of the diverging cone of the aspirator. The aspirator provides vacuum generation and suction flow over a range of vacuum levels at the suction taps, and suction flow only passes through a single check valve before entering the aspirator.

A suction-type swimming pool cleaner having an elongate body formed by a suction head and an elongate, tubular structure extending from the suction head, the orientation of the body being at least partially controlled by arms carrying a float and a connection bracket connecting the arms in a releasable manner to the body, to allow the float to be connected to the body at any selected one of a number of different positions along the body length, the head includes a valve chamber having a wedge-shaped hammer oscillating in the chamber responsive to suction flow through the head, the hammer seating against shoulders in the chamber, the shoulders being partially rebated and partially sloped to ensure that they are flushed clean of any particulate matter which could interfere with proper hammer seating.

A suction connection arrangement for a compass saw includes a suction connection element (26) for connecting suction flow producing apparatus with the compass saw, a suction channel (24) for connecting the suction cross-section (18) of the saw with the suction connection element and completely separable from the compass saw (2), and a connection device (30) for releasably connecting the suction connection elements (26) with the saw housing (4).

A suction catheter system is described with a suction nozzle that can extend from a guide catheter of the like. The suction nozzle can be positioned by tracking the suction nozzle through a vessel while moving a proximal portion of the suction extension within the lumen of the guide catheter. A suction lumen extends from the proximal end of the guide catheter through at least part of the guide catheter central lumen and through the suction tip. Desirable suction flow can be established using the guide lumen to facilitate the suction. Also, a delivery catheter is described with an elastic tip that can track closely over a guidewire. The elastic tip of the delivery catheter can be expanded to provide for the delivery of medical devices past the tip.

An inhalation device may include a control and an air pump that is connected to the control. The air pump is controlled by the control such that the air pump supplies an inhalation flow, or inhalation volume or both according to a predetermined time course to a nebulizer connected to the air pump. The inhalation flow, inhalation volume or both is controlled by controlling the air pump, rather than by using valves.

The invention relates to an automatic blending control method of oil field fracturing fluid, which is mainly used for automatic blending control of fracturing fluid during fracturing operation of the oil field. In the method, the powder blanking speed is controlled by adjusting the output rate of a feeder; the clear water suction flow is controlled by adjusting a clean water suction pump so as to control the liquid level of a mixing tank; the liquid level of a hydration tank is controlled by adjusting a conveying pump; the flow of the fluid feed pump is adjusted according to the actual discharge flow and the set fluid feed proportion; and a discharge pump is controlled according to the actual discharge flow and the set discharge flow. The method can not only realize accurate, continuous and even charging and high-quality continuous liquid preparation, effectively remove water bag powder, but also can realize automatic control of a computer, and ensures that the matching and mixing speed is adjusted in real time and the fluid matching parameter is stored and recycled.

A processing gas supply hole is constituted with a gas outlet hole formed at an electrode plate and a gas injection hole formed at a processing gas supply mechanism main unit. At the gas injection hole, a processing gas having flowed in on the upstream side is injected toward the gas outlet hole through an injection opening of a nozzle portion disposed on the downstream side, so as to generate a suction force at a suction flow passage formed around the nozzle portion by taking advantage of the ejector defect.

The invention discloses a shielding gas circulating filtration device for a 3D printing metal powder bed forming cavity and an optimization method of the shielding gas circulating filtration device. According to the optimization method, the vertical movement distance z of processed smoke is adjusted and is not larger than the height h of an air suction flow guiding channel, and accordingly the purposes that the processed smoke is completely captured by the air suction flow guiding channel, and the pressure from an air inlet flow dividing port to an air suction flow guiding port in the forming cavity is gradually reduced are achieved; and a machined metal part has the beneficial effects of being good in surface quality, high in density, good in mechanical performance and the like.

An apparatus and method for delivering a fluid using non-mechanical lock hopper eductor assembly. The assembly including at least one lock hopper coupled to an eductor motive fluid inlet, a source of a treatment material and a suction flow outlet. The lock hopper configured to contain therein a pressurized treatment fluid as an output suction flow. The lock hopper is coupled to an eductor pump assembly. The eductor pump assembly including a suction chamber in fluidic communication with the eductor motive fluid inlet, the suction flow outlet and a fluid mixture outlet. The suction chamber configured to output a fluid mixture to a mixing chamber coupled to said fluid mixture outlet and configured to mix the fluid mixture therein. The eductor pump assembly further including an expansion feature coupled to said mixing chamber and configured to expand the fluid mixture therein for delivery to a downstream component.