104results about How to "Reduce air turbulence" patented technology

A ventilator to replace or supplement a patient's breathing includes a control valve in the form of a proportional obstacle valve (POV) to provide improved air flow control and ventilator operation reliability. The POV includes an inlet, an outlet and a bypass. A stopcock controlled by a stepper motor directs the flow of air through the bypass and outlet permitting the turbine to operate a constant RPM yet allowing control of the airflow to a patient. The ventilator also includes inhalation and exhalation valve assemblies which improve air flow control and are easy to manufacture. The inhalation valve includes an orifice disk to allow pressure sensors to move accurately measure air flow. The exhalation valve assembly includes wings to reduce turbulence and enhance sensor accuracy. The exhalation valve assembly is arranged to have warm air from cooling the turbine blow over the assembly to reduce the possibility of condensation forming therein. The ventilator also includes an improved power supply with redundant sources of power.

An automotive vehicle wheel apparatus includes a turnable cover or door for a wheelhouse opening in a fender. In another aspect, a sheath or liner is provided close to at least half of a circumference of a wheel. A further aspect blocks and/or removes circumferential air moving with a wheel.

A printer includes a heating roller unit that heats recording paper at a position downstream of a recording head, which is provided at an upstream position, in the direction of the transportation of the recording paper. The recording head ejects ink to the recording paper that is transported from an upstream side to a downstream side. The heating roller unit is disposed along the direction of the width of the recording paper, which intersects with the transportation direction thereof. The heating roller unit is divided into a plurality of areas in the width direction. Heat applied by first areas of the plurality of areas to the recording paper is different from heat applied by second areas, which are adjacent to the first areas in the width direction, to the recording paper.

A speaker enclosure including a compact quarter wavelength transmission path in the shape of a closed spiral that expands radially outward from a centrally located loudspeaker mounting location. The height of the transmission path has a minimum height that is equal to the height of the basket of the desired speaker. The quarter wavelength transmission path spiral of the provides an aerodynamic path for air flow therein which reduces the turbulence of air flow to a minimum that in turn provides even resistance to the air flow within the transmission line (Exhale vs. Inhale).

In various aspects of the invention a flow vortex suppression apparatus for use in an air intake duct having a mass air flow sensor is disclosed. The flow vortex suppression apparatus includes an air flow permeable fibrous vortex dispersive media installed into the air duct in a position upstream of the mass flow sensor and configured to occlude the air duct such that air flow in the duct is constrained to pass through the vortex dispersive media. The vortex dispersive media is configured and adapted to diffuse vortices and reduce air turbulence of an air stream entering the mass flow sensor, thereby reducing variations and noise in a flow measurement signal from the mass air flow sensor.

A medication storing and dispensing cassette is comprised of a housing defining at least a portion of a bulk storage chamber for storing a medication, defining at least a portion of a pick-up area, and defining at least a portion of a discharge chute sized to temporarily store a quantity of the medication. A divider wall is positioned between the bulk storage chamber and the pick-up area. A gate is positioned to control an exit end of the discharge chute. A rotatable conveying wheel having openings proximate to the periphery thereof is positioned such that a portion of the wheel is in communication with the pick-up area while another portion of the wheel is adjacent to an entrance end of the discharge chute. A calibration arm is positioned adjacent the openings of the rotatable wheel. A baffle is positioned to block those openings in that portion of the rotatable wheel adjacent to the discharge chute. An air agitation system is provided so that pills may be moved from the bulk storage chamber to the pick-up area. Methods are also disclosed in which air agitation is used to move pills from the bulk storage chamber to the pick-up area, for automatically setting the position of the calibration arm and for automatically learning the setting for the calibration arm for an unclassified medication. A counter is also disclosed for use with the cassette. The counter is comprised of a loader for receiving a cassette, a sensor for sensing whether a cassette is in the loader, means for moving the loader into an operative position, a vacuum unit for applying a vacuum to the cassette, a drive unit for driving a driven portion of the cassette and a counter for counting medication within a portion of the cassette. Methods of operating the counter are also disclosed.

A system includes a gas turbine combustor, which includes a combustion liner disposed about a combustion region, a flow sleeve disposed about the combustion liner, an air passage between the combustion liner and the flow sleeve, a fuel injector disposed downstream of the combustion liner and the flow sleeve, a liner mount extending between the combustion liner and the flow sleeve, and a crossfire tube extending between the combustion liner and the flow sleeve. The fuel injector, the liner mount, and the crossfire tube are aligned with one another in a flow enhancing arrangement along a common axis in an axial direction relative to an axis of the gas turbine combustor. The flow enhancing arrangement reduces an air flow disturbance caused by the fuel injector, the liner mount, and the crossfire tube.

A centrifugal fan has a circular main plate driven and rotated by a motor rotary shaft, a plurality of blades fixed to an outer circumferential portion of the main plate and spaced apart at predetermined intervals in a circumferential direction of the main plate, and a side plate attached to ends of the blades opposite to the main plate. An air inlet port is formed at the center of the side plate. The side plate inclines outward in centrifugal directions from the air inlet port and has an arcuate cross section with a predetermined radius of curvature. A dead water region reducing space is formed between the blades and the side plate. The dead water region reducing space forms a smooth flow between the two surfaces of each blade, bringing about desirable blade performance.

An apparatus includes a wheel cover having a relatively-planar disc shape covering a concavity of a truck wheel rim, and a retainer for holding the wheel cover on the wheel rim. In one form, the retainer includes a hula-hoop-shaped ring that engages a channel in the outer lip of the wheel rim (or engages a channel formed by brackets attached to the outer lip). In another form, the retainer includes a clamp ring retainer attached to the rim's axle portion, and coil springs biasingly retaining the wheel cover to the truck wheel. The wheel cover includes radial ribs each having an outer end that forms a pocket shaped to engage an outer lip on the truck rim, thus holding and centering the wheel cover on the truck wheel. Anti-wear foam components are attached to reduce wear by the wheel cover on the rim.

The invention discloses an axial flow wind wheel with improved blades, which comprises a wheel hub and a blade, and the blade and the wheel hub are formed as a whole. The invention is characterized in that the external circumferential part of the blade is bent from a windward side to a leeward side, and the bent width is gradually decreased from a front edge to a tailing edge; by adopting the structure, the leakage vortex at the external circumferential front edge and the air stream disturbance at the apex of the blade can be controlled. When the axial flow wind wheel rotates, the leeward side at the front edge of the blade has lower pressure, so as to cause large pressure difference between the windward side and the leeward side at the front edge of the blade, and turns up the apex of the blade towards the windward side, thus the pressure difference at the two sides of the apex of a blade can be reduced, and the leakage vortex at the external circumference of the blade can be inhibited. The angle that the air stream enters the front edge of the blade is greatly changed from the wheel hub to the external circumference, which can effectively reduce air-inlet impact loss, achieve the purpose of promoting the efficiency of the wind wheel; and meanwhile, when an impeller rotates, as the angle of attach of the air current i is smaller, the cutting air stream without impact at the front edge of the blade can generate lower pressure disturbance, thus playing an obvious role in reducing noise.

The present invention relates to a device for minimizing the aerodynamic drag that results when tractors, trailers, rigid trucks, lorries, and other vehicles are moving through air. In particular the invention relates to a plate-shaped flow conductor having a front edge, a lower edge, a rear edge and an upper edge. The flow conductor is mountable along the upper edge in a substantially vertical position to a body portion of a pulled vehicle of a vehicle combination of at least two pivotally connected vehicles. When mounted the flow conductor extends at least partially under the body portion in a longitudinal direction of the pulled vehicle. Characteristic for the flow conductor according to the invention is that the flow conductor comprises locally in conjunction with the front edge a thickened portion, which has a streamlined outer contour in a cross section transversally to the front edge.

The invention discloses a subcaliber shot launching and separating device. The subcaliber shot launching and separating device comprises a shot support for supporting and launching shots, and a separation device, wherein the shot support is provided with two different structures including an I type shot support body and an II type shot support body, and the separation device is used for separatingthe shot support. One end of a guiding device is arranged on a gun barrel, and a guiding hole consistent to a gun barrel inner hole in size and smooth finish, a releasing hole with the large diameter, and four air releasing holes with the fan-shaped cross sections are included. The separation device is arranged at the other end of the guiding device and provided with a cone boss and a launching hole allowing the shots to pass. The guiding hole and the releasing hole of the guiding device, the launching hole of the separation device and the barrel pipe inner diameter are coaxially arranged. Bymeans of the subcaliber shot launching and separating device, the subcaliber shots can be smoothly launched and stably separated from the shot support, and the situations of obvious shot rotation, rotation speed losses and the like are avoided.

A film is formed by casting a ribbon on a support from a flow cast die while pulling said ribbon toward said support by providing a decompression area. The decompression area is divided into a middle portion, a left portion and a right portion. Degrees of decompression in these three portions satisfy the following formulae: <paragraph lvl="0"><in-line-formula>0<(PC-PL)x100/|PC|<15; </in-line-formula><paragraph lvl="0"><in-line-formula>0<(PC-PR)x100/|PC|<15; </in-line-formula><paragraph lvl="0"><in-line-formula>|PL-PR|x100/|0.5(PL+PR)|<10; </in-line-formula>wherein PC is a degree of decompression in said middle portion, PL a degree of decompression in said left portion, and PR a degree of decompression in said right portion. The film obtained by the above method is suitable for a polarizing plate protection film, which is used for a liquid crystal display device.