90results about How to "Avoid stress changes" patented technology

A catheter system suitable for the retrieval of debris and other solid or liquid matter from body passages, and the removal of said matter from the body. More particularly, a catheter system including two or more concentrically-arranged conduits and an inflatable element connected therebetween, wherein the inflatable element is arranged such that it may entrap solid or liquid matter in an internal annular cavity.

The present invention relates to an improved cerebrospinal fluid shunt system comprising a coating covering at least part of the system and a flow restricting component exerting a passive and essentially constant resistance to flow. The present invention also relates to methods for implanting different catheters of a cerebrospinal fluid shunt system into a brain ventricle and the sinus system, respectively, of an individual. The present invention further relates to methods for shunting cerebrospinal fluid from a brain ventricle to the sinus system of an individual.

A system for fabricating nanoparticles that includes a micro droplet sprayer, a device, and a drying chamber is disclosed. The micro droplet sprayer, such as an inkjet sprayer, composed of a tank, a channel, an actuator, and orifices is utilized for generation of micro droplets. The device is employed to provide the micro droplet sprayer with energy, thus, forcing droplets out. The droplets are dried in the drying chamber, obtaining nanoparticles.

A casing (31) houses therein an expansion mechanism (60) and a compression mechanism (50). The expansion mechanism (60) has a rear head (62) in which a pressure snubbing chamber (71) is provided. The pressure snubbing chamber (71) is divided by a piston (77) into an inflow/outflow chamber (72) which fluidly communicates with an inflow port (34) and a back pressure chamber (73) which fluidly communicates with the inside of the casing (31). The piston (77) is displaced in response to suction pressure variation whereby the volume of the inflow/outflow chamber (72) varies. This enables the inflow/outflow chamber (72) to directly perform supply of refrigerant to or suction of refrigerant from the inflow port (34) which is a source of pressure variation, thereby making it possible to effectively inhibit suction pressure variation.

A balloon catheter includes an outer conduit having an outer surface, and an inner conduit having an outer surface. The inner conduit is suitable for passage over a guide wire, and the inner conduit is movably disposed within the lumen of the outer conduit. There is also a balloon having a proximal margin and a distal margin, such that the proximal margin of the balloon is attached to the outer surface of the distal tip of the outer conduit and the distal margin of the balloon is attached to the outer surface of the portion of the inner conduit that extends beyond the distal tip of the outer conduit. And there is a fluid port for introducing an expansion fluid into the annular space formed between the inner surface of the outer conduit and the outer surface of the inner conduit and into the lumen of the balloon, and for the removal of the expansion fluid.

A vane-type camshaft phaser having a rotational authority between 40 crank degrees before TDC and 30 crank degrees after TDC. The phaser includes a stator seat formed at a rotation position intermediate between full advance and full retard. A locking pin in a vane of the rotor engages the seat, locking the rotor at the intermediate position. The pin is disengaged by pressurized engine oil independent of oil flows for advance and retard of the rotor. The oil is controlled by a dedicated valve. Preferably, the seat and the ends of the locking pin are vented by passages in the rotor and stator which are aligned when the rotor is at the selected locking angle to remove oil resistance to entry of the pin into the seat. To position the locking pin over the seat, phasing rate is reduced to allow time for the locking pin to engage the seat.

The invention relates to a process for producing potassium fluotitanate by environment-friendly treating fluorine-contained and potassium-contained waste, and the process comprises the following steps of placing titanium ore with theoretical quantity into fluorine-contained waste liquid and potassium liquid to prepare potassium fluotitanate slurry; placing clear liquid after the potassium-containing slag or waste liquid is filtered into potassium fluotitanate clear liquor to prepare the potassium fluotitanate; carrying out liquid-solid separation, washing and drying of potassium fluotitanate slurry liquid, placing lime into the waste slag and the waste water to adjust the pH value, and filtering the waste slag and the waste water to obtain filter slag, placing the filter liquid into a degrading pond, adding oxidant, utilizing the ultraviolet light to radiate the filter liquid for 1 to 5h, and detecting chemical oxygen demand (COD) and analyzing F-. The fluorine-contained and potassium-contained waste is used for substituting the hydrogen fluoride and the imported potassium fluoride to produce the potassium fluotitanate, so that waste can be converted into treasure, the recycling rate of the fluorine, the titanium and the potassium is not different from the quality product raw material, fluorine and potassium are adequately utilized, the production cost of the potassium fluotitanate is reduced, and the problem of the environmental pollution caused by the fluorine-contained waste and the potassium-contained waste can be solved.

A liquid ejection head includes a downstream filter chamber that is disposed at an inlet opening of an ink introduction path and is provided with a filter disposed therein, and a flexible film that is disposed on an inner wall of the filter chamber at a position downstream of the filter, wherein the flexible film is configured to deform in accordance with the pressure changes in the flow channel.

The invention belongs to environmental engineering area. The measuring apparatus includes gas-collecting vessel. A biogas tube is connected to the gas-collecting vessel. A buoy is installed inside the gas-collecting vessel, and an aqueduct is connected inside the buoy. Outlet pipe in lower part of the buoy is connected to an outlet pipe outside the vessel. Then, the outlet pipe outside the vessel is connected to a measuring tank. Yield of biogas is measured indirectly from measuring water discharge. Comparing with drainage and gas collection method, the disclosed method keeps pressure stable in examination so as to raise measuring accuracy.

A liquid ejecting head includes: a supply channel member including a plurality of supply channel plates, and the supply channel including supply holes provided through the respective supply channel plates and a supply groove formed by removing part of one of adjacent supply channel plates in terms of the direction of thickness thereof for communicating the respective supply holes; a pressure generating element that provides a pressure to the pressure generating chamber; a supply communication channel that connects a storage unit having the liquid stored therein and a reservoir, the supply communication channel being formed through a pressure chamber plate and the supply channel member in the direction of thickness thereof, the supply channel plates having the supply groove being formed with a recess having the substantially same depth as the supply groove at an area corresponding to the supply communication channel; and a filter unit having a plurality of filter holes provided on the bottom of the recess.

The invention relates to a manufacture method of a circuit board. The manufacture method comprises the following steps: firstly, providing a basal board comprising two conductive layers and an insulation layer arranged between the conductive layers; then, forming a hydrophobic film on one conductive layer; forming a hole extending form one conductive layer to the other conductive layer; forming a conductive connecting structure in the hole and connecting the conductive connecting structure between the conductive layers; removing the hydrophobic film after forming the conductive connecting structure; and finally, patterning the conductive layers to form two line layers.

Provided is a gas dissolving device capable of dissolving gas in a liquid in a supersaturated state and maintaining such a saturated state in a stable manner, and being easily attached to a water server or the like.

The gas dissolving device generates hydrogen water by dissolving hydrogen in water, and discharges the hydrogen water from an outlet. The gas dissolving device includes a dissolving chamber that stores under pressure generated hydrogen water introduced therein, and pressure reduction and transfer means for preventing pressure variation in a tube-shaped passage that connects the dissolving tank and the outlet due to an action of discharging the hydrogen water from the outlet, and for forming a laminar flow.

A temperature controller includes: a closed first circulation circuit having a fluid cooler; a closed second circulation circuit having a halogen lamp heater as a fluid heater and feeding a thermal fluid heated by the halogen lamp heater to a vacuum chamber as an object to be temperature-controlled; a feed path that feeds the thermal fluid from the first circulation circuit to the second circulation circuit; and a discharge path that discharges the thermal fluid from the second circulation circuit and returns the thermal fluid to the first circulation circuit. A flow-rate control valve that adjusts and controls a feed flow-rate of the thermal fluid from the first circulation circuit is provided in the feed path. A pressure control valve that compensates a pressure of the thermal fluid at a predetermined pressure level or less is provided in the discharge path.

The invention relates to the technical field of medical auxiliary equipment, and particularly relates to a self-locking radial artery compression hemostat. The self-locking radial artery compression hemostat comprises a fixing assembly, a compression hemostasis assembly and an adjusting mechanism, wherein the fixing assembly is used for fixing the hemostat at a puncture position, the compression hemostasis assembly comprises a compression rod and a hemostasis pad connected to the lower end of the compression rod, the compression rod comprises a rack structure, and the adjusting mechanism is installed on the fixing assembly and used for adjusting the position of the compression hemostasis assembly. The self-locking radial artery compression hemostat is reasonable in design, and the problemsthat an existing hemostat is unstable, complex in structure, prone to accidental touch, incapable of accurately timing and the like are solved.

A compact steering mechanism for steering a vehicle having a steering input being a pinion shaft coupled to a pinion meshing with a rack, and a steering output member coupled to the rack. The pinion is positioned at a middle portion of the rack and the output member is positioned between opposing ends of a rack. The mechanism includes a compact steering housing supporting the pinion shaft and containing the rack-and-pinion. The pinion and pinion shaft have a center axis parallel to an axis of the output member. The output member, being a steering pin and rack carrier, a gear, or a flange, is coupled to left and right tie rod assemblies and wheels for steering the vehicle to improve handling.