485 results about "Viscous flow" patented technology

A method / apparatus for multiplexing plural ion beams to a mass spectrometer. At least two ion sources are provided with means of transporting the ions from the ion sources to separate two-dimensional ion traps. Each ion trap is used for storage and transmission of the ions and operates between the ion sources and the mass analyzer. Each ion trap has a set of equally spaced, parallel multipole rods, as well as entrance and exit sections into which and from which ions enter and exit the trap, respectively. For each ion trap, the entrance section is placed in a region where background gas pressure is at viscous flow. The pressure at the exit section drops to molecular flow pressure regimes without a break in the structure of the ion trap. Each trap alternately stores and transmits ions by way of a fast voltage switch applied to the ion trap exit lens.

The present invention is a method and system for simulating fluid flow in a cavity, having relevance to the modeling of viscous flows within thin cavities of complex shapes in which heat exchange with the cavity walls may be a governing factor, as in injection molding of plastic parts. Its automated discretization scheme, in which the model cavity is partitioned into macrocells, each macrocell having substantial contact areas with the model cavity walls, eliminates the need for time consuming and expensive manual model configuration required by some modeling methods. Because of the simplicity of the discretization, models based on the invention are less demanding on computer resources then conventional finite element methods, and execute more quickly. A key innovation of the method is a function characterizing the shape of a macrocell that appears in a coefficient in equations governing the flow. As a consequence of the improvements offered by the invention, molds for complex parts can be fabricated more rapidly, with the resulting parts having high quality.

An objective of the present invention is to form a hyper-elastic flange integrally within a shield case body around a periphery thereof while decreasing an occupied area for grounding. The shield case 2 according to the present invention is disposed to cover electronic parts 6 on a circuit board 1, and which has a flange 7 formed integrally therewith so as to contact with a metallic ground line 3 on the circuit board 1. The flange 7 is elastically deformed to be grounded, thus a leakage of electromagnetic waves to the outside of the shield case 2 is prevented. The flange 7 is made of metallic glass. By forming the flange 7 from metallic glass, a displacement due to viscous flowing on the atomic level, which is different from a plastic deformation, can be utilized, and thus a high precision flange can be formed without a spring-back.

Disclosed herein is the structure of a damper that is capable of improving the degree of freedom in design to optimize the damping characteristics of the damper and is capable of allowing the damper to be easily optimized and manufactured for a wide variety of dynamic stiffness characteristics of a tool body, and a manufacturing method using the same. A plurality of ring-shaped elastic members are disposed at opposite ends of a weight part. The weight part is connected to the tool body via the elastic members. Consequently, the weight part is moved relative to the tool body. The plurality of elastic members are mounted while spacers are disposed between the elastic members, and the spacers are moved with respect to the weight part in the axial direction thereof. A viscous fluid is filled in the region surrounded by the outer circumferential surfaces of the spacers, the elastic members, and the inner surface of a hollow part of the tool body. Consequently, it is possible to damp the relative movement of the weight part with respect to the tool body.

A projection having a micro-aperture on the tip is formed. Firstly, a projection or a dent is formed on a substrate. Then, a film is formed on the surface of the projection or of the opposite side of the dent so as to make the film thin at and near the tip of the projection or the dent. The film is subsequently etched to expose the tip, which is further etched to produce a micro-aperture. Preferably, the film is formed of a thermo-plastic material such as glass, especially phospho-silicate glass to produce a viscous flow under heated conditions. The probe having a micro-aperture can be used for a surface scanner, an aligner or an information processor.

The invention consists of an evaporative cooling device comprising one or more microchannels whose cross section is axially reduced to control the maximum capillary pressure differential between liquid and vapor phases. In one embodiment, the evaporation channels have a rectangular cross section that is reduced in width along a flow path. In another embodiment, channels of fixed width are patterned with an array of microfabricated post-like features such that the feature size and spacing are gradually reduced along the flow path. Other embodiments incorporate bilayer channels consisting of an upper cover plate having a pattern of slots or holes of axially decreasing size and a lower fluid flow layer having channel widths substantially greater than the characteristic microscale dimensions of the patterned cover plate. The small dimensions of the cover plate holes afford large capillary pressure differentials while the larger dimensions of the lower region reduce viscous flow resistance.

The humic-mineral agent from naturally occurring carbon-series humites and caustobioliths comprises humic acids and salts thereof, naturally hydrated humic acids, hydrolyzed humic acids, hydrated and hydrolyzed humic-mineral and mineral complexes of parent carbon-series humites and caustobioliths chemically bound to the naturally hydrated humic acids. The method for preparing a humic-mineral agent comprises crushing and disintegrating of carbon-series humites and caustobioliths and mixing them with an alkali. The carbon-series humites and caustobioliths are crushed and disintegrated when their moisture content is close to the natural level at which humic acids are in a naturally hydrated state, hot water is added to the. Next an alkali is added thereto and the mixture is hydrolyzed till obtaining the end product having consistency from viscous-flow to plastic and the pH value of from 6.5 to 8. The method for detoxication of polluted soil. The method for detoxication of waste products of mining and processing useful minerals and for reclaiming waste piles and tailing pits, the method for sewage water treatment and the method for salvaging sewage sediment are carried into effect by using the humic-mineral agent mentioned before.

A method of transporting gas and entrained ions between higher and lower pressure regions of a mass spectrometer comprises providing an ion transfer conduit 60 between the higher and lower pressure regions. The ion transfer conduit 60 includes an electrode assembly 300 which defines an ion transfer channel. The electrode assembly 300 has a first set of ring electrodes 305 of a first width D1, and a second set of ring electrodes of a second width D2 (≧D1) and interleaved with the first ring electrodes 305. A DC voltage of magnitude V1 and a first polarity is supplied to the first ring electrodes 205 and a DC voltage of magnitude V2 which may be less than or equal to the magnitude of V1 but with an opposed polarity is applied to the second ring electrodes 310. The pressure of the ion transfer conduit 60 is controlled so as to maintain viscous flow of gas and ions within the ion transfer channel.

Sound absorbent (1) of a hard material, such as metal, glass, hard plastic or composites thereof, for absorption of acoustic waves by friction of viscous flow, essentially in the frequency range between 100 and 4000 Hz. The sound absorbent (1) comprises a panel element (3) with microslits (5) therethrough, said microslits (5) having a minimum slit width (b) of less than 0.45 mm. When in use, the panel element (3) is arranged with a distance to a rear surface.