189 results about "Particle trapping" patented technology

Devices, apparatus and methods are disclosed for non-contact pneumatic sampling and sampling of surfaces, persons, articles of clothing, buildings, furnishings, vehicles, baggage, packages, mail, and the like, for contaminating aerosols indicative of a hazard or a benefit, where the contaminating aerosols are chemical, radiological, biological, toxic, or infectious in character. In a first device, a central orifice for pulling a suction gas stream is surrounded by a peripheral array of convergingly-directed gas jets, forming a virtual sampling chamber. The gas jets are configured to deliver millisecond pneumatic pulses that erode particles from solid surfaces at a distance. In another aspect of the invention, a suction gas stream is split using an air-to-air concentrator so that a particle-enriched gas flow is directed to a particle trap and any particles immobilized in the particle trap (including any adsorbed vapors associated with the particles) are selectively analyzed to detect trace residues associated with explosives.

Devices, apparatus and methods are disclosed for non-contact pneumatic sampling and sampling of surfaces, persons, articles of clothing, buildings, furnishings, vehicles, baggage, packages, mail, and the like, for contaminating aerosols or vapors indicative of a hazard or a benefit, where the contaminating aerosols or vapors are chemical, radiological, biological, toxic, or infectious in character. In a first device, a central orifice for pulling a suction gas stream is surrounded by a peripheral array of convergingly-directed gas jets, forming a virtual sampling chamber. The gas jets are configured to deliver millisecond pneumatic pulses that erode particles and vapors from solid surfaces at a distance. In another aspect of the invention, a suction gas stream is split using an air-to-air concentrator so that a particle-enriched gas flow is directed to a particle trap and particles immobilized therein are selectively analyzed for explosives and explosives related materials under optimized conditions for analyzing particle-associated constituents and a bulk flow is directed to a vapor trap and free vapors immobilized therein are selectively analyzed for explosives and explosives related materials under optimized conditions for analyzing free vapors. Detection signals from the particle channel and the vapor channel are compared or integrated to detect trace residues associated with explosives.

Near-field sub-wavelength C-apertures provide enhanced spatial resolution and power throughput by increasing the normalized resonant wavelength of the aperture. These improved apertures are characterized by the use of improved geometric proportions for C-apertures, filling the aperture with high-index material, designing aperture thickness to produce longitudinal transmission resonance, and / or tapering the aperture in the longitudinal direction to achieve impedance matching. Apertures according to the present invention may be used for many technological applications in various portions of the electromagnetic spectrum. Exemplary applications to high density optical data storage and optical particle trapping and manipulation are described.

The invention includes methods for forming particle traps along surfaces of PVD components, and comprises PVD components having particle traps thereon. The invention can include utilization of highly soluble media for bead-blasting and / or can include utilization of metallic materials as bead-blasting media. The invention can also include formation of an insert along regions of a backing plate where particle traps are desired, with the insert being of a composition which has better particle-trapping properties than the backing plate.

Air filter with a sidewall and inverted cone cap sections; a beveled crown unifying the sidewall with the cap to form a one-piece filter; a seat on the bottom of the wall section with seals for contact with a support; and a flange affixed to the cap to adjust contact with a support surface. The filter media includes four-layer oleophilic cotton mesh layers supported between two structural mesh layers, with an efficacious amount of oil to increase particle trapping.

A diffuser particle separator may be integrated into a gas turbine engine to remove corrosive dust and salt particles from the engine's core air flow. The air flow may pass over a series of particle accumulator entrance orifices, trapping particles in a particle accumulator while allowing the air flow to continue unimpeded. Since dust deposits may become molten at high temperatures, removal of dust from the core and secondary airflow may be critical for long-life superalloy and ceramic components, particularly those with small diameter air-cooling holes and thermal barrier coatings.

The invention relates to the technical field of particle dust removal, and in particular relates to a method for efficiently catching nanometer micro-particles and a device for realizing the method. The method comprises the following steps of: enabling particles to carry positive charges or negative charges, mixing airflows to increase agglomeration of particles, and trapping the particles. The device comprises a primary dust collection and charge unit, an induction agglomeration unit and a secondary dust collection unit, all of which are sequentially connected. The method for efficiently catching the nanometer micro-particles, disclosed by the invention, has the advantages of simple and continuous process, easiness for implementation and theoretical and practical application values. According to the method for efficiently catching the nanometer micro-particles and the device for realizing the method, disclosed by the invention, micro-particles can be effectively trapped, the efficiency of trapping the nanometer micro-particles with diameters of lower than 2.5 microns can be improved by at least 30%.

The invention discloses an active regeneration grading control method for a particle trap. The active regeneration grading control method aims to acquire the real-time carbon loading amount and temperatures of the particle trap. According to the carbon loading amount, a plurality of carbon loading limit values are determined, a plurality of temperature limit values are determined according to thetemperatures, the real-time carbon loading amount and the carbon loading amount limit values of the particle trap are compared, the real-time particle trap temperatures and the temperature limit values are compared, an active regeneration mode is determined, and the active regeneration mode is one or a combination containing more than one of the conditions that an engine is controlled to defer theignition angle, the air-fuel ratio becomes lean, and the idle speed is increased. According to the active regeneration grading control method for the particle trap, the mode of active regeneration isdetermined according to the regions where different carbon loading amount and the temperatures of the particle trap are located and the marking of the region, so that the carbon deposition is effectively removed in time when the carbon loading amount is too high, and the exhaust back pressure is reduced.

Air filter with a sidewall and inverted cone cap sections; a beveled crown unifying the sidewall with the cap to form a one-piece filter; a seat on the bottom of the wall section with seals for contact with a support; and a flange affixed to the cap to adjust contact with a support surface. The filter media includes four-layer oleophilic cotton mesh layers supported between two structural mesh layers, with an efficacious amount of oil to increase particle trapping.

A porous multilayered hollow fiber for outer side pressed filtration is made of a multilayer comprising a supporting layer constituted of the thickness of an expanded porous polytetrafluoroethylene tube, and a filtration layer provided on the outer surface of the supporting layer, wherein pores surrounded by fibrous frameworks in the filtration layer are smaller than those of the supporting layer, and the mean of the maximum fibril length (L) of the fibrous frameworks surrounding each pore in the outer surface of the filtration layer is designed to be small such that (X) and (Y) fall within the range on the XY plane, where (X) is a particle diameter of particles captured when the particle trapping ratio is equal to or more than 90% in the case where the filtration is done under an elevated pressure of 0.1 MPa, and (Y) is a value designated as RFL obtained by dividing (L) by (X). Thus, the degradation of flow rate due to the elapse of time can be prevented, since solid particles to be separated do not enter into pores, and dogging and blockade of the pores do not occur even in the case of filtering a solution of high turbidity. As a result, it is possible to recover filtration property easily by performing back-wash reverse filtration and to maintain excellent filtration property for a long time.

The high-voltage switching device used in one installation position and has metallic encapsulation (10) a switching gap (4) and a particle trap (1) for holding foreign body particles (2), and is characterized in that in the one installation position, the particle trap (1) is arranged vertically underneath the switching gap (4), in the one installation position, an isolator part (8) is provided, which has a surface (8a) aligned essentially horizontally and faces the interior of the high-voltage switching device, with a metallic wall (9), which is higher than the particle trap (1; 1′), being arranged between the isolator part (8) and the particle trap (1; 1′). The particle trap (1) has a viewing window (3). If the high-voltage switching device is a disconnector, this viewing window (3) may be identical to the viewing window (3) for visual access to the visible disconnecting gap (4) of the disconnector. The high-voltage switching device is used particularly advantageously in a second installation position and has a second particle trap, with the second particle trap arranged vertically underneath the switching gap (4) in the second installation position. This results in the high-voltage switching device having good operational reliability and a low susceptibility to defects.

A lithographic apparatus includes a radiation source configured to produce a radiation beam, and a support configured to support a patterning device. The patterning device is configured to impart the radiation beam with a pattern to form a patterned radiation beam. A chamber is located between the radiation source and patterning device. The chamber contains at least one optical component configured to reflect the radiation beam, and is configured to permit radiation from the radiation source to pass therethrough. A membrane (44) is configured to permit the passage of the radiation beam, and to prevent the passage of contamination particles (54) through the membrane. A particle trapping structure (52) is configured to permit gas to flow along an indirect path from inside the chamber to outside the chamber. The indirect path is configured to substantially prevent the passage of contamination particles (58) from inside the chamber to outside the chamber.

Devices, apparatus and methods are disclosed for non-contact pneumatic sampling and sampling of surfaces, persons, articles of clothing, buildings, furnishings, vehicles, baggage, packages, mail, and the like, for contaminating aerosols indicative of a hazard or a benefit, where the contaminating aerosols are chemical, radiological, biological, toxic, or infectious in character. In a first device, a central orifice for pulling a suction gas stream is surrounded by a peripheral array of convergingly-directed gas jets, forming a virtual sampling chamber. The gas jets are configured to deliver millisecond pneumatic pulses that erode particles from solid surfaces at a distance. In another aspect of the invention, a suction gas stream is split using an air-to-air concentrator so that a particle-enriched gas flow is directed to a particle trap and any particles immobilized in the particle trap (including any adsorbed vapors associated with the particles) are selectively analyzed to detect trace residues associated with explosives.

A lithographic apparatus includes a radiation source configured to produce a radiation beam, and a support configured to support a patterning device. The patterning device is configured to impart the radiation beam with a pattern to form a patterned radiation beam. A chamber is located between the radiation source and patterning device. The chamber contains at least one optical component configured to reflect the radiation beam, and is configured to permit radiation from the radiation source to pass therethrough. A membrane (44) is configured to permit the passage of the radiation beam, and to prevent the passage of contamination particles (54) through the membrane. A particle trapping structure (52) is configured to permit gas to flow along an indirect path from inside the chamber to outside the chamber. The indirect path is configured to substantially prevent the passage of contamination particles (58) from inside the chamber to outside the chamber.

The present invention provides a fine particle separation treatment system comprising: a storage tank for storing a solution; a solution circulating passageway for circulating the solution in the storage tank, and a cyclone separator disposed in the solution circulating passageway for separating fine particles in the solution. The cyclone separator comprises: an inlet passageway communicating with a solution outlet side of the storage tank; a flow-out passageway communicating with a solution outlet side of the storage tank; a cyclone portion for generating an eddy flow at a given flow rate by feeding a fine particle-containing solution from the inlet passageway, transferring the fine particles to the outer side by a centrifugal force to issue the solution after separating the fine particles from the flow-out passageway, and precipitating the separated fine particles by decelerating the eddy flow; and a particle trap box for trapping the precipitated fine particles in the cyclone portion through a communication hole. An electrode rod is disposed at the center of the particle trap box, and the fine particles are electrically separated by applying a potential between the electrode rod and an electrode of the particle trap box.

The invention includes PVD targets having non-sputtered regions (such as, for example, sidewalls), and particle-trapping features formed along the non-sputtered regions. In particular aspects, the particle-trapping features can comprise a pattern of bent projections forming receptacles, and can comprise microstructures on the bent projections. The targets can be part of target / backing plate constructions, or can be monolithic. The invention also includes methods of forming particle-trapping features along sidewalls of a sputtering target or along sidewalls of a target / backing plate construction. The features can be formed by initially forming a pattern of projections along a sidewall. The projections can be bent and subsequently exposed to particles to form microstructures on the bent projections.

A nanofeature particulate trap comprising a plurality of densely packed nanofeatures, such as nanotubes, and a particulate detector incorporating the nanofeature particulate trap are provided. A method of producing a nanotrap structure alone or integrated with a particulate detector is also provided.

A method of separating particles is provided that includes exposing a selective PDMS adhesive to a particle-contaminated surface, where the selective PDMS adhesive captures particles present on the particle-contaminated surface to form a fouled selective PDMS adhesive, and exposing the fouled selective PDMS adhesive to a PDMS transfer sheet, where particles outside of a desired range are transferred over to the PDMS transfer sheet, where the fouled selective PDMS adhesive retains only the particles of a desired range.

Embodiments disclosed herein provide a detector unit and sensor chamber with matter retention member and method for making the same. In one embodiment, a smoke chamber can include a detection circuitry member having a surface, a particle trapping member mounted to the surface, and a chamber coupled to the detection circuitry member. The chamber can include a planar member, and several baffles extending away from the planar member in the direction towards the detection circuitry member and disposed around a periphery of the planar member, wherein a distal end of each baffle interfaces with the particle trapping member.

The embodiment of the invention discloses a particle catcher state reminding method, device and system and a storage medium. An engine control unit can determine the current carbon load of a particlecatcher according to collected vehicle operation condition information and compares the current carbon load with a first carbon load threshold. If the current carbon load exceeds the first carbon loadthreshold, the particle catcher is controlled to execute active regeneration operation, the active regeneration state of the particle catcher is determined, reminding information is generated, and the active regeneration state and the reminding information are sent to a vehicle instrument and a client, so that the vehicle instrument and the client display the active regeneration state and the reminding information. In this way, a driver senses the driving condition difference due to the active regeneration operation in time, thereby avoiding complaints. Moreover, the driver can timely deal with a vehicle according to the display information, so that the situation that the driver knows vehicle faults only when too many particles are accumulated and accordingly normal use is affected is avoided.

Disclosed are devices that include spark or particle arresting, features and muffler features. The disclosed devices may include: (a) an upstream inlet receiving exhaust gas flow; (b) a downstream outlet discharging exhaust gas flow; (c) a cylindrical body disposed between the upstream inlet and downstream outlet; and (d) a particle trap having an opening for collecting particulate matter in the exhaust gas flow, the particle trap disposed downstream of the cylindrical body on a wall of the device. The cylindrical body of the devices typically includes an annular channel permitting axial flow of gas therethrough from an upstream end of the annular channel through a downstream end of the annular channel. The downstream end of the annular channel may be configured to have openings for discharging exhaust gas flow and imparting a spiral flow to the discharged gas flow. As gas exits the annular channel, the particulate matter is forced radially outward via centrifugal force towards the wall of the device where the particulate matter is collected in the particle trap.

A particle detector includes an input port for receiving gas and particulate matter. A charging source generating positively and negatively charged species that charges at least some particulate matter in charging region, thereby generating a plurality of charged particles. A trapping region is formed having a potential energy minimum that attracts and confines the plurality of charged particles. A detector detects charged particles in the trapping region.

The invention discloses an air purification method. The air purification method comprises the steps as follows: a), air to be purified is subjected to adiabatic compression in a compressor, and the temperature of the air is raised to the activation temperature of a catalyst in subsequent catalytic reaction; b), the compressed air enters a catalytic cleaner, and harmful substances in the air change into harmless gases under the action of the catalyst; and c), the purified air which is processed by the catalytic cleaner is fed into an expansion machine for adiabatic expansion, so that the air is cooled. After the air to be purified is subjected to adiabatic compression by the compressor, the air temperature is 50-400 DEG C, the pressure is 0.4-0.8MPa, and the volume compression ratio is 3-6. The catalyst in the catalytic cleaner can be one or more of a PM2.5 honeycomb ceramic particle trapping filter, an ozone catalytic purification agent, a volatile organic chemicals (VOCs) catalytic purification agent, a carbonic oxide (CO) catalytic purification agent, a NOx catalytic purification agent and a SOx trapping cleaning agent. According to the air purification method, the harmful substances in the air can be effectively removed, the indoor air quality is improved, and the energy can be saved remarkably.

A non-polluting brake assembly comprising a caliper bracket, a rotor disc, two movable pads clamped by a caliper, the pads comprising friction material capable of releasing particles resulting from abrasion, and a suction device arranged at least partially in proximity to the caliper bracket, the suction device comprising, in proximity to each pad, a suction zone delimited by a deflector and in which a negative pressure is created, characterized in that the deflector comprises at least one portion located in an external radial position relative to the pad.

The invention discloses a floating anchor chain expandable settling particle catching device, which comprises a floating system, an offshore warning and positioning system, an anchor chain system anda counterweight system. At least one expansion unit is connected with that anchor chain system, and the expansion unit comprises an expansion pipe arm and an expansion device. The expansion pipe arm comprises a bracket, a support ring and an annular buckle, wherein the expansion pipe arm comprises a bracket, a support ring and an annular buckle. The support comprises a hollow upright post and a support arm, wherein the upright post jacket is provided with at least one support ring, the support ring and the upright post are connected with each other through the support arm, a plurality of ringbuckles are arranged on the support ring, and the ring buckles are symmetrically arranged around the outer wall of the support ring; The expansion device is arranged on an annular buckle, and comprises a sediment capture device, an image acquisition device and a culture device, and is mainly used for sedimentation particle collection, in-situ cultivation, data acquisition and measurement, etc., and is of great significance in the research of the global marine carbon cycle and the biological pump.

The invention provides a method for preparing an equivalent life-cycle ash degradation sample piece of a gasoline particulate filter (GPF). The method comprises the following steps: (1) determining anaverage engine oil consumption of a GPF supporting vehicle; (2) analyzing and determining compositions of boron, calcium, magnesium, phosphorus and zinc in an engine oil used by the GPF supporting vehicle, and the content of sulfate ash; (3) substituting data measured in the step (1) and the step (2) into a GPF life-cycle ash degradation amount prediction calculation formula to calculate a totalGPF life-cycle target ash accumulation amount; and (4) using a GPF rapid ash accumulation cycle on an engine pedestal to finally obtain the equivalent life-cycle ash degradation sample piece of the GPF. The method for preparing the equivalent life-cycle ash degradation sample piece of the GPF provided by the invention can calculate the accumulation amount of the GPF life-cycle degradation ash, rapidly accumulates ash by the engine pedestal, and finally prepares the equivalent real vehicle life-cycle ash degradation sample piece of the GPF.

A method and apparatus for a filter for filtering airborne particles present within an enclosure containing equipment sensitive is provided. The filter may be used within the enclosure of a hard disk drive. The filter may comprise a magnetic plate enclosed by a protective layer, which in turn may be enclosed by a non-woven scrim. The magnetic plate has a magnetic property that generates a magnetic field attractive to paramagnetic particles within the enclosure. The protective layer forms a barrier that prevents particles of the magnetic plate from entering into the enclosure. The non-woven scrim may, but need not, have an adhesive property which traps non-paramagnetic particles coming in contact with the non-woven scrim. If the non-woven scrim lacks an adhesive property, then at least a portion of the non-woven scrim may be coated with an adhesive layer which traps non-paramagnetic particles coming in contact with the non-woven scrim.