113 results about "Open aperture" patented technology

A continuous high-frequency oscillation breathing device delivers therapy during both inhalation and exhalation in order to assist in clearing secretions from the lungs. A fixed shrouded-venturi patient interface circuit is combined with medicated aerosol to deliver continuous high-frequency oscillation therapy. Fixed open apertures in the patient interface circuit allow ingress and egress of flow, and are calibrated to allow exhalation and prevent stacking of successive breaths.

A light-amount adjusting apparatus includes a plurality of light-amount adjusting blades that causes a size of a light-passing aperture to change by rotation thereof. Each of the light-amount adjusting blades includes a base portion on which a rotation center portion and a driven portion are formed, and a blade portion that overlaps another light-amount adjusting blade in a light-passing direction so as to form the light-passing aperture. A thickness of the blade portion is thinner than that of the base portion. When the plurality of light-amount adjusting blades is rotated to set the light-passing aperture to be smaller than a full-opened aperture, a thickness of a portion that overlaps an adjacent stop blade is thinner than that of a portion that does not overlap the adjacent stop blade in each of the light-amount adjusting blades. The blades have high dimension accuracy, and deterioration of the optical performance of the apparatus is reduced.

A method of fluid etching an absorbent stratum is disclosed. The method includes providing an absorbent stratum; providing a fluid etching process comprising one or more fluid jets, a carrier belt, and a stencil; c) expelling fluid from the fluid jets through the open apertures of the stencil; and d) fissuring the absorbent stratum.

The invention relates to a novel method for measuring wax-sealed bulk volume density of a wax seal measuring asphalt mixture, and belongs to the technical field of road asphalt mixture design. Through forming a wax film with definite thickness on the surface of an asphalt mixture test piece to wrap all opening apertures on the surface inside the wax film, a test piece volume comprising stone, asphalt, closed aperture and open aperture is formed, namely, a needed real volume, so that the test result is more real and reliable, and accuracy of mix design of the asphalt mixture is effectively ensured. The method can effectively unify the densities of the asphalt mixtures in different aperture ranges, and avoid inconvenience that the prior asphalt mixtures in the different aperture ranges need to adopt different density measuring methods.

A heat pump heat exchanger includes a first manifold, a second manifold spaced from the first manifold, a plurality of refrigerant tubes hydraulically connecting the manifolds, and a distribution tube disposed in the first manifold. The distribution tube includes an inlet end, a distal end opposite the inlet end, a plurality of orifices between the inlet end and the distal end. The distribution tube also includes a terminal aperture immediately adjacent the distal end, wherein the terminal aperture includes an open aperture area greater than any one of the open orifice area. The open aperture area is large enough to provide a uniform refrigerant collection with acceptable minimal pressure drop in evaporative mode, but small enough to prevent vapor overflow to an area of the manifold adjacent to the distal end in condenser mode. The length of the distribution tube is less than 3/4 the length of the first manifold.

A method for coating a component and forming at least one cooling hole in a component is provided. The method includes providing the component having a surface and including a plurality of apertures formed therein. The method includes masking at least one of the plurality of apertures with a plug comprising a removable material. The method includes applying at least one coating to the surface of the component. The method includes eliminating the plug including removable material leaving open apertures in the surface of the coated component. Also provided is a water-soluble aperture plug including water soluble high temperature resistant filler materials including aluminum oxide, zirconium oxide, magnesium oxide, silicon dioxide, zircon, graphite, tungsten carbide, silicon carbide, silicon nitride, boron nitride, aluminum nitrides and binding agents and dispersants including phosphates, silicates, sugar, salt, gum, resin, polyvinyl alcohol (PVA), polyethylene glycol, and combinations thereof.

The invention provides an acoustic attenuator comprising: a body defining a cavity therein and having at least one open aperture in fluid communication with the cavity; and opposing first and second walls, the second wall being substantially parallel to the first wall, the body comprising at least one of the first and second walls, wherein the aperture and the cavity at least partly define a resonant frequency band across which the body attenuates incident acoustic waves, and wherein the first and second walls are separated by a gap.

The present invention is a calibration and measurement system designed primarily for use in the rapid evaluation and characterization of open or visible wounds in patients. The invention in a preferred embodiment comprises a set of colored concentric rings, constructed of paper or synthetic material. The practitioner removes only as many rings, from the center outward, until the entire wound is visible within the open aperture at the center of the remaining rings. The area dimensions of the wound are then read out from the size of the inner remaining ring. Photography optionally records the wound appearance and size. A related system is developed for linear dimensioning of wounds. This invention is also designed to standardize the color scheme for accurate photography wound description. This color scheme is also applicable to a linear device to accurately describe wound size. The invention is also useful in forensic and accident investigations.

This invention discloses a 3-D low inductance parent row and its manufacturing method. This parent row chooses polyimide film with acrylic acid glue on one side as the insulation layer, the acrylic acid glue as the sticker; add insulation pad on at least one open-aperture of the parent row; rivet bronze sheathes on other open-apertures of the parent row, or open deep aperture on the row. The manufacturing method includes the following processes: (1) bronze plate punching; (2) curving; (3) trimming; (4) surface process; (5) cleaning; (6) lamination. The advantages are good use of space position, thin insulation layer, low inductance and small resistance.

The invention discloses a monolithic catalyst for natural gas catalytic conversion for synthesis gas preparation. The monolithic catalyst is characterized in that whole foam silicon carbide is utilized as a carrier; the carrier has a three-dimensional communicated-aperture channel structure having open aperture sizes of 0.1 to 6mm and carries at least one of Ni and Rh; and the content of an active metal component is in a range of 0.1 to 25wt%. The monolithic catalyst can convert natural gas, steam and oxygen into synthesis gas so that the temperature distribution of catalyst bed layers is more uniform.