746results about How to "Easy to vent" patented technology

A centrifuge chamber of a cell separator having a separation channel with an inlet to introduce the cell suspension and at least one outlet to withdraw a fraction of the cell suspension is described. The cell suspension can be blood. The separation channel is shaped like a spiral extending from the radially outer end of the channel to the radially inner end of the channel, with a progressive slope. The centrifuge chamber allows a uniform, contaminant free separation of the cell suspension into its components.

A multiwall vented bag is provided which includes an inner tube formed of a plastic material. The inner tube has an open end initially in an open position and adapted to receive filling material therein and at least one vent opening formed therein. The bag further includes a strip of material positioned adjacent and attached to a preselected region of the inner tube. The preselected region includes the at least one vent opening of the inner tube. The strip also includes at least one vent opening to allow air to pass from within the inner tube, through both the at least one vent opening of the inner tube and the at least one vent opening of the strip. The bag further includes an outer tube positioned to substantially surround outer surfaces of the inner tube. The outer tube is formed of a porous material that allows air released from within the inner tube to pass out of the bag through porous material of the outer tube. A method of forming and using a vented bag are also included.

A novel small quasi-hemispherical truncated-dome modular-dot like device, which can be readily affixed to pavement in a Federally-mandated pattern via a special hole/matrix-stencil;—the resulting demarkations thereby serving to alert the Legally-blind (as well as Guide-dogs, persons in wheelchairs, and otherwise pre-occupied non-handicapped individuals) their pedestrian-pathway is entering into a potentially dangerous transition area typically crossed by a motor-vehicle pathway. The individual so called DW-DOTS™ are resilient circular low-profile devices having an annular-ramp configuration, and thus standing out only sufficiently above a foot-surface as to enable foot-tactile detection, yet not pose the potential tripping hazzard known to embedded-mats. This novel safety-button offers a desired permanent contrasting-color, plus has a definition and rugged permanency not known to poured-dot installations. The disclosure sets forth various generic-variant structural embodiments, as well as the preferred method of attachment to a walkway-pavement surface.

The invention discloses a rapid investment casting method based on stereolithography (SL). A wax mould in investment casting is replaced with a resin prototype (1) produced by applying a 3D printing technology, the resin prototype (1) is of a thin-walled honeycomb structure, an ingate (2) is arranged on the resin prototype (1), a gating system adopts a conventional wax gating system (3), a groove (4) is formed in the wax gating system (3), the ingate (2) is inserted into the groove (4) to be bonded and fixed during tree casting, a wax rod (5) is arranged on the resin prototype (1), and vent holes are formed after shell making. The rapid investment casting method reduces the casting cost, reduces the production cycle, and avoids the cracking phenomenon of a shell in the process of roasting.

An RF-excited waveguide laser module comprises a first electrode having a first elongate surface defining in part a waveguide laser channel extending along an optical axis, the first elongate surface having a substantially linear cross-section normal to the optical axis. A second electrode has a second elongate surface defining in part the waveguide laser channel extending along the optical axis. The second elongate surface has a non-linear cross-section normal to the optical axis. A dielectric insert may be provided between the electrodes defining in part the waveguide laser channel. A lengthwise gap may extend essentially an entire length of the waveguide laser channel between one of the first and second electrodes and the dielectric insert. The gap provides fluid communication between the waveguide laser channel and a volume outside the waveguide laser channel.

An efficient and passive micro fuel cell includes an anode plate, a reaction plate, a cathode plate and a condensation plate. The anode plate draws a dilute solution of methanol from a fuel tank to delivery to a series of upper oxidation reaction room through micro-channels by thermal capillarity. The condensation plate separates carbon dioxide and vapor from each other. Meanwhile, the methanol solution is delivered to a plurality of lower oxidation reaction rooms. Protons pass through the inner walls of the reaction holes and a porous membrane layer and arrive in the lower reduction reaction rooms. The lower reduction reaction rooms and the lower oxidation reaction rooms have reaction holes whose inner walls have carbon nanotubes and catalysts. A plurality of upper reduction reaction rooms delivers oxygen for the reduction reaction and drains the reduced water at the same time.

The invention relates to a casting method of a main reducer housing. The casting method includes: a precoated sand core forming process, a smelting ball iron process and a casting process, the precoated sand core forming process includes core-making of precoated sand, coated sand type assembly and sand-type steel shot filling; the smelting ball iron process includes electric-furnace smelting and charging of molten iron and treatment; the casting method is characterized by including casting, unboxing, de-gating, one-step shot blasting, grinding, secondary shot blasting and detecting. With the method, exhaust smoothness is guaranteed, generation of hole defects in the casting is avoided from the sand core exhaust process, sand hole and pore defective reject rate is controlled within 1%, shrinkage or porosity defect is avoided, the casting is stable in size and high in surface smoothness, the yield is higher as compared with that with a traditional casting method of the main reducer housing, the production process is easier to control, and production competitiveness has higher advantages.

A liquid crystal display mainly includes two substrates processed for vertical alignment and a liquid crystal having a negative dielectric constant anisotropy sealed between the two substrates. An array of slits is provided on pixel electrodes formed on one substrate. A light-shielding matrix and an array of protrusions is provided on the other substrate. Each of the first protrusions has a main body being arranged substantially in a zigzag pattern and in parallel to one another. The slits and the main bodies of the first protrusions are arranged alternately. The liquid crystal display is characterized in that the first protrusions have a plurality of breaks formed within the area of the light-shielding matrix.

The invention provides a refrigeration control method used for an air-conditioner. The method includes the steps that the outdoor environment temperature is detected; the opening degree of a plurality of preinstalled expansion valves corresponding to a plurality of outdoor environment temperature ranges one by one is set; the opening degree of the expansion valves of the air-conditioner is adjusted according to the outdoor environment temperature and the outdoor environment temperature ranges. Correspondingly, the invention further provides a refrigeration control system and the air-conditioner. According to the technical scheme, the opening degree of the expansion valves can be increased in time when the outdoor environment temperature is excessively low, so that the pressure of a condenser is improved, and the refrigerating capacity of the air-conditioner can be prevented from being lowered substantially.

The invention belongs to the field of casting technologies, and particularly relates to a composite material used for casting an aluminum alloy box body oil duct and a method of the composite material used for casting the aluminum alloy box body oil duct. In order to solve the deep hole casting technical problem which is difficult to solve through an original casting technique, avoid the phenomenon that drilling is performed after hole-forming through an inlaying-cast steel pipe, and thus the oil duct is not homocentric and the aluminum base face is scratched, and solve the problem that a box body oil duct made of a common sand core can not meet the requirement for leakproofness, the composite material comprises metal pills, iron powder, roughing sand and a self-hardening resin sand binding agent, the oil duct core is made from the composite material to take place of an oil duct hole made of a steel pipe, interlayer defects can not be generated between the steel pipe and an aluminum substrate, and the potential hazard that steel scrapes enter the oil duct is avoided. According to the oil duct core made from the composite material, a compact chilling layer can be formed around the oil duct and meet the requirement for the leakproofness of the oil duct and is easy to scatter and low in gas forming, the surface of the oil duct is good in smoothness, and the oil duct can meet use requirements even if the oil duct is not subjected to machining.

The invention discloses lead frame and packaging structure forming methods. The packaging structure forming method comprises the following steps: a lead frame is provided, wherein the lead frame comprises a first surface and a second surface which is opposite to the first surface, the lead frame is provided with a plurality of bearing units which are arranged in a matrix manner and medium-strength ribs for fixing the bearing units, each bearing unit comprises a plurality of discrete pins, and a first opening is formed between every two neighboring pins; a first plastic packaged layer for filling the first openings is formed; an insulating layer is formed on the first surface of the lead frame and the surface of the first plastic packaged layer, wherein second openings for exposing surfaces of the pins are formed in the insulating layer; a plurality of semiconductor chips are provided, wherein each semiconductor chip is provided with a plurality of bonding pads, and metal bumps are formed on the bonding pads; and the plurality of semiconductor chip are arranged on the lead frame in a flipping manner, and the metal bumps on the semiconductor chips and the surfaces of the pins exposed out from the second openings are soldered together to form a plurality of packaging units which are arranged in a matrix manner. According to the method of the invention, the packaging efficiency can be improved.

The invention discloses a low-pressure casting method, a cooling control process and an exhaust system of a large impeller. The low-pressure casting method comprises the steps that a manufactured forming element and a manufactured mold core are dried, and a low-pressure casting mold of the impeller is preheated; a casting material is put in a casting device, heating and smelting are carried out to form a casting solution, and slag removal is carried out on the casting solution when the casting solution reaches the set temperature; the casting mold of the impeller is assembled, and the casting mold of the impeller and the casting device are connected to form an impeller casting system; the low-pressure casting device is subjected to low-pressure mold filling along a set pressure curve; after mold filling is finished, the low-pressure casting mold of the impeller is cooled; and after the temperature of the low-pressure casting mold of the impeller is reduced to the set temperature, the impeller is taken out to be cleaned. In the casting process, the pressure and the speed are adjusted, and therefore short run can be reduced; aluminum liquid oxidization can be controlled by adjusting the aluminum liquid temperature; and shrinkage porosity can be reduced by adjusting the cooling process.

The invention relates to a lithium ion battery formation process and a lithium ion battery obtained by the lithium ion battery formation process. The lithium ion battery formation process adopts a mode of combining segmented negative pressure and segmented current, and the formation process comprises three stages: in the first stage, the negative pressure is 20-60Kpa, and the lithium ion battery is charged to 5-15% SOC at a constant current of 0.05-1 C; in the second stage, the negative pressure is 80-90 Kpa, and the lithium ion battery is charged to 20%-30% SOC at a constant current of 0.1-0.3 C; in the third stage, the negative pressure is 20-40 Kpa, and the lithium ion battery is charged to a cut-off voltage at a constant current of 0.3-0.5 C. The formation process is beneficial to exhausting in the formation process, reducing the liquid loss, avoiding swelling of the battery cell and improving the formation interface; the process is simple and convenient to operate, short in formation time and convenient to produce, and meanwhile, the formation process adopts one-time full charge, so the interface side reaction of the electrode and the electrolyte is fully carried out, and thecapacity consistency and the self-discharge screening consistency are improved.