182 results about "Open tube" patented technology

Methods for restoring blood flow in occluded blood vessels using an apparatus having a self expandable distal segment that is pre-formed to assume a superimposed structure in an unconstrained condition but can be made to take on a volume-reduced form making it possible to introduce it with a microcatheter and a push wire arranged at the proximal end, with the distal segment in its superimposed structure assuming the form of a longitudinally open tube and having a mesh structure of interconnected strings or filaments or struts. In a preferred embodiment, the distal segment has a tapering structure at its proximal end where the strings or filaments or struts converge at a connection point.

A medical implant, having a proximal and a distal end, that is preformed to assume a superimposed structure at an implantation site but can be made to take on a volume-reduced form making it possible to introduce it by means of a micro-catheter and a guide wire arranged at the proximal end, with the implant in its superimposed structure assuming the form of a longitudinally open tube and having a mesh structure of interconnected strings or filaments. The implant has a tapering structure at its proximal end where the strings or filaments converge at a connection point.

A centrifuge to which sample tubes can be introduced while the centrifuge is in motion. The centrifuge comprises a carousel having an upper portion and a lower portion. The upper portion of the carousel has a plurality of positions for sample tubes for a centrifugation operation, a plurality of drive mechanisms attached to the upper portion of the carousel, a movable element mounted upon each drive mechanism, the movable element capable of traversing the length of the drive mechanism when the drive mechanism is actuated, a sample tube-holding assembly comprising a sample tube holder and a bearing attached to each movable element, and at least one balancing element capable of contributing to a force vector that cancels an imbalance vector generated by rotation of the centrifuge.

The invention discloses an apparatus for measuring early-stage autogenous shrinkage of a cement-based material. The apparatus comprises a test piece die, a pre-embedded target and a displacement measurement system, wherein the test piece die comprises an outer die and an inner die, the outer die is a box-like cuboid with an open upper end, the inner die is a rectangular frame which can be accommodated in the outer die, corresponding positions of two opposite end faces of the outer die and two opposite end faces of the inner die are respectively provided with a circular through hole, the pre-embedded target comprises an internal thread open tube and a threaded rod mutually fitting, the threaded rod can pass through the circular through holes in the inner die and the outer die, the displacement measurement system is a non-contact displacement measurement system and comprises a displacement sensor and a displacement signal acquisition and processing unit, and the displacement sensor can monitor displacement of the pre-embedded target and transmits monitored displacement information to the displacement signal acquisition and processing unit for processing. The invention further discloses a method for measuring early-stage autogenous shrinkage of the cement-based material. According to the invention, testing can be carried before prehardening, and the apparatus has the advantages of a simple structure and low cost.

A method for on-site measuring permeability coefficient of landfill gas adopts a measurement system comprising a lower opened tube well, a gas pressure sensor, a gas pressure display recording instrument, an extraction pipeline valve, a leachate emptying valve, a leachate emptying pipe, a gas measuring apparatus and a centrifugal fan. The method adopting extraction mode comprises the following step tube well internal pressure and extraction flow rate are recorded after the gas is stable; and the permeability coefficient of landfill gas is obtained after the substitution to a stationary model. In the method, not only are the conventional extraction pipeline and equipment in a landfill utilized, but also the defects of easy explosion and high hazards which are caused after air and methane are mixed when gas injection mode is adopted are overcome, further the characteristics of landfill covering permeability and permeability coefficient difference in horizontal direction and vertical direction of the landfill caused by layered landfilling and compaction are fully considered. Therefore, the method provided by the invention has the advantages of high measurement accuracy, simple system, and convenience in operation; in addition, key parameters are provided for the pollution control and the recycling of the landfill gas, so that the method has a promised application prospect.

A muffler for quieting the operation of a pneumatic tool. In one embodiment the muffler (630) is disposed within a volume defined by a peripheral wall (612) that receives an exhaust stream. An upper plate (631) having several open tubes (632) is disposed in the volume. Each tube is has an intermediate blocking plate (634). A plurality of sound-deadening panels (636) is disposed below the upper plate. The panels have apertures that slidably engage the tubes. A lower plate (650) is disposed below the tubes. The lower plate includes a plurality of apertures (657). One or more diffuser panels (652, 654) is disposed beneath the lower plate. An external exhaust vent (670) closes the volume. In operation, the exhaust enters the volume, is directed through the tubes, then into the sound-deadening panels, back into the tubes, and through the diffuser panels.

The present invention is a device to restrict the sampling of analyte ions and neutral molecules from surfaces with mass spectrometry and thereby sample from a defined area or volume. In various embodiments of the present invention, a tube is used to sample ions formed with a defined spatial resolution from desorption ionization at or near atmospheric pressures. In an embodiment of the present invention, electrostatic fields are used to direct ions to either individual tubes or a plurality of tubes positioned in close proximity to the surface of the sample being analyzed. In an embodiment of the present invention, wide diameter sampling tubes can be used in combination with a vacuum inlet to draw ions and neutrals into the spectrometer for analysis. In an embodiment of the present invention, wide diameter sampling tubes in combination with electrostatic fields improve the efficiency of ion collection.

A method using a mixer for disbursing an additive in a tube of compound. The mixer includes a rigid cylinder and a plunger assembly. The cylinder is configured for receiving an opened tube of compound, to which additive has been introduced. The plunger assembly includes a shaft on which a cap is slidably and rotatably mounted. A mixer blade is mounted on a first end of the shaft and a second end of the shaft is provided with a handle. The cap is provided with a pair of cutouts designed for receiving a pair of studs mounted on the outside surface of the cylinder, such that the cap may be fitted on the cylinder and turned to engage the studs with the cutouts and connect the cap and the cylinder. The handle may be rotated and reciprocated to move the mixer blade through the contents of the tube for mixing.

A novel open tube with a zwitterionic betaine polymer layer can be prepared by initiated grafting polymerization. This open tube can be used for separating inorganic anions, peptides and proteins. A capillary electrophoresis method and a capillary chromatography method use the novel open tube. There are methods for manufacturing the novel open tube.

An air intake system includes a pre-cleaner having a plurality of tubes configured to receive a flow of air, to filter particulate material from the flow of air, and to provide the flow of air to an engine of an off-road vehicle. The system also includes a controller configured to receive a first signal indicative of an air intake flow rate of the engine, to determine a target number of open tubes for the pre-cleaner based at least in part on the air intake flow rate and a desired air flow rate for each tube of the plurality of tubes, and to output a second signal to a component of the air intake system indicative of instructions to enable the flow of air to the target number of open tubes and to block the flow of air to the remainder of tubes of the plurality of tubes.

A method for dispensing a plurality of metered doses of a fluid, comprising: providing a fluid in a container comprising a plurality of metering chambers and a plurality of tubes connectable to and movable relative to the chambers, wherein the tubes are externally open or open to the fluid; connecting to the chambers tubes open to the fluid, thereby loading the chambers with fluid; and selectively connecting one or more externally open tubes to one or more chambers, thereby dispensing the fluid contents of the one or more chambers via an external opening.

The invention discloses a method for preparing an open-tube electrophoretic column coated with nanometer titanium dioxide, as well as application thereof. In an etched capillary column, an open-tube capillary electrophoretic column coated with the nanometer titanium dioxide is prepared by a water (solvent) thermal method. The preparation method is characterized in simplicity, coatings insusceptible to fall off, and the like, and is suitable for the selective enrichment and separation of functionalized phosphorylated polypeptide and protein in complex biological samples. Titanium dioxide molecules are combined with silicon hydroxyl on the surface of the inner wall of a capillary through chemical bonds, and nanometer titanium dioxide particles are uniform in grain, complete in coatings and capable of effectively reducing the nonspecific adsorption effect to the protein and other macromolecule samples. The surface properties and micropore structures of the coatings can be conveniently controlled by changing the categories and proportion of middle pore-forming agents in hydrothermal mixtures, so as to obtain a phosphorylated polypeptide capillary column with adjustable pore diameter and specific surface area.

The invention discloses a slim tube sedimentation unit and separation system and separation method of suspended particles. The slim tube sedimentation unit comprises a tube bundle formed by fixing a plurality of slim sedimentation tubes into a whole, wherein one end of each slim sedimentation tube is an opening used as a liquid inlet, while the other end is connected with a liquid collecting cabin; the liquid collecting cabin is connected with a liquid outlet; and sewage inflows from the liquid inlet and outflows from the liquid outlet through the slim sedimentation tubes. In the separation system and the separation method of suspended particles, the slim tube sedimentation unit inclines a certain angle and inserts in open tube water or tube water (close tube water), and an inlet at the lower end of the slim tube sedimentation unit is below the water level to ensure that water inflows from the bottom of the slim tube sedimentation unit; suspended particles in the sewage are separated by the slim tube sedimentation unit; and treated clear water or outlet water containing micron-sized particles outflows from the upper part of the slim tube sedimentation unit. The invention can separate and treat the particles in the sewage by grading, achieve the effect of efficiently removing the suspended particles in the water and can be applied to various fields.

A tube case heat exchanger comprises a drum body and a sealing cover positioned at one end of the drum body, wherein a liner is arranged in the drum body; a cooling liquid inlet and a cooling liquid outlet are formed in upper and lower sides of the liner; the liner and the drum are sealed by a liner cover plate; the sealing cover and the cover plate are arranged at the same side; the liner is internally provided with a heat exchange tube bundle structure comprising at least one irregular W-shaped heat exchange tube; each irregular W-shaped heat exchange tube is formed by bending the same straight tube and comprises a first U-shaped tube and a second U-shaped tube which are positioned at different planes and provided with openings in the same direction; respective straight tubes of each first U-shaped tube and the corresponding second U-shaped tube are connected by a bent tube to form a third U-shaped tube with the opening in the opposite direction; the irregular W-shaped heat exchange tubes are uniformly arrayed and arranged along the radial direction of the heat exchanger in a staggering mode; the other straight tubes of the first U-shaped tubes and the second U-shaped tubes penetrate through the cover plate of the liner of the heat exchanger as opening tubes; the opening tubes among different irregular W-shaped heat exchange tubes are serially connected by tube fittings. The tube case heat exchanger is compact in structure, and safe and efficient in use.

The invention discloses a pneumatic transmission downlink transceiving workstation device and a transceiving method. The pneumatic transmission downlink transceiving workstation device comprises an open tube, a transparent sliding door, an electric sliding valve, a sensing detection device and a terminal controller, wherein the transparent sliding door is covered in the position of a side opening of the open tube, the sensing detection device is used for detecting whether a transmission carrier in a tube cavity passes through or not and exists or not, and the terminal controller is connected with the electric sliding valve and the sensing detection device and used for controlling a workstation to transmit and receive transmission bottles. As three working positions are arranged in the electric sliding valve and matched with the sensing detection device, the bottle clamping problem in a Y-shaped tube or an S-shaped elbow during downward movement can be solved by negative pressure generated by a pipeline during transmitting; and during receiving, an air cushion is used for cushioning, then the impact to the transmission bottles can be slowed down, and the pneumatic transmission downlink transceiving workstation device has the advantages of high transmission efficiency, safety, reliability and the like.

The invention belongs to the technical field of conducting materials and discloses an ionic liquid coated paper of a thin-walled carbon nanotube and a preparation method of the ionic liquid coated paper. An ionic liquid in the paper of carbon nanotubes is evenly coated on the outer surfaces of the carbon nanotubes to form a coaxial structure, and then the carbon nanotubes are mutually lapped to form a net structure. The paper of the carbon nanotubes is prepared by the steps that firstly 15wt% to 30wt% of ionic liquid and the thin-walled carbon nanotube are subjected to dispersion mill, and then are compacted. The ionic liquid can have functions of dispersing the thin-walled carbon nanotube, opening tube bundles of the thin-walled carbon nanotube and serving as an adhesive. Compared with resistance of papers of thin-walled carbon nanotubes, which are directly compacted without using the ionic liquid, the resistance of the prepared paper of the thin-walled carbon nanotube is reduced by 20-40%, when the paper is used as an electrode material of a supercapacitor at a voltage of 4-6.5 volts, the performances of the supercapacitor are improved by 20-100%, and when the paper is used as a strength material, the tensile strength is improved by 20-100%. Besides, the preparation method has the advantages of being low in cost and easy to repeat and amplify.