Article comprising a diffuser with flow control features

A diffuser, the first fluid technology, applied in the direction of conveying bulk materials, transportation and packaging, conveyors, etc., can solve problems such as unstable flow

Inactive Publication Date: 2003-06-11
DELSYS PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0066] (3) Flow instability due to boundary layer separation and eddies

Method used

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  • Article comprising a diffuser with flow control features
  • Article comprising a diffuser with flow control features
  • Article comprising a diffuser with flow control features

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0100] In this detailed description, well-known fluid dynamics concepts are cited, for example, including "boundary layer" and "fluid separation" theories. Because these concepts are well known to those skilled in the art, these concepts will not be defined or discussed in this article.

[0101] Figure 14 A part of a deposition apparatus 1A according to the teachings of the present invention is shown. Figure 14 The part of the apparatus 1A shown in FIG. 1 includes the area of ​​the powder charging delivery pipe 416, the fluid rectifier 517, the diffuser 518, and the deposition station 550. Figure 14 Also shown is the substrate 8, the electrostatic chuck 302, and the receiver 272, which are all engaged with the deposition station 550.

[0102] The powder-carrying gas leaves the powder charging delivery pipe 416 and enters the fluid rectifier 517, where the turbulence in the powder-carrying gas is reduced. As described in detail later in this specification, the fluid rectifier c...

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PUM

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Abstract

A diffuser comprises a conduit having a cross-sectional area that increases in a direction fluid flow. In one embodiment, the diffuser is used to reduce the incidence and severity of flow fluctuations that occur in an electrostatic deposition apparatus. In some embodiments, the diffuser includes one or more flow control features. A first flow-control feature comprises one or more appropriately-shaped annular slits through which fluid having a greater momentum than a primary fluid moving through the diffuser is injected into the "boundary layer" near the wall of the diffuser. A second flow control feature comprises one or more annular slits or, alternatively, slots or holes that are disposed at appropriate locations around the circumference of the diffuser through which a portion of fluid flowing in the boundary layer is removed. Boundary-layer flow removal is effected, in one embodiment, by creating a pressure differential across such annular slit or slots. Among other benefits, such flow control features reduce any tendencies for flow separation of the primary fluid in the diffuser.

Description

[0001] Declaration of related application [0002] The present invention relates to the international patent application PCT / US99 / 12772 entitled "Drugs and methods and equipment for manufacturing the same" filed on June 8, 1999. Technical field [0003] The present invention relates to improvements in equipment for manufacturing medicines. Background technique [0004] In the pharmaceutical industry, drugs are usually tablets, caplets, test strips, capsules, etc. These drugs include diagnostic products, which include one or more "unit dosage forms" or "unit diagnostic forms" (collectively referred to as "unit forms"). [0005] Each unit form usually contains at least one drug or biologically active ingredient (collectively referred to as "active ingredient") and inert / inactive ingredients. These active and inactive ingredients, usually in powder form, are suitable for processing into unit forms. [0006] In the above-cited international patent application, the applicant discloses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K9/14B65G53/58B05B5/025B05B5/03B05B5/043B05B5/047B05B5/08B05B5/16B65G53/44
CPCB05B5/08B05B5/032Y10S239/07B05B5/1683B05B5/047B05B5/043Y10T137/2273Y10T137/2076B05B5/04
Inventor K·D·奥马拉D·凯勒J·T·麦克金
Owner DELSYS PHARMA
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