324 results about "Tube length" patented technology

A surgical instrument for the dissection of bone and other tissue includes a spindle, a dissection tool and an coupler disposed between the spindle and the dissection tool. The coupler includes a tool collet and an attachment locking mechanism operable to permit tool collet operation and telescoping movement of an attachment tube with respect to the dissection tool. A method is also provided for convenient coupling of the dissection tool and adjustment of the attachment tube length.

An intraluminal device implantable in a blood vessel having an aneurysm therein in the vicinity of a perforating vessel and / or of a bifurcation leading to a branch vessel. The intraluminal device includes a mesh-like tube of bio-compatible material having an expanded condition in which the tube diameter is slightly larger than the diameter of the blood vessel in which it is to be implanted, and the tube length is sufficient to straddle the aneurysm and to be anchored to the blood vessel on the opposite sides of the aneurysm. The mesh-like tube also has a contracted condition wherein it is sufficiently flexible so as to be easily manipulatable through the blood vessel to straddle the aneurysm. In its expanded condition, the mesh-like tube has a porosity index of 55%-80% such as to reduce the flow of blood through its wall to the aneurysm sufficiently to decrease the possibility of rupture of the aneurysm but not to unduly reduce the blood flow to a perforating or branch vessel to the degree likely to cause significant damage to tissues supplied with blood by such perforating or branch vessel.

A method of optimizing the audio performance of an earpiece and the resultant device are provided. The disclosed earpiece combines at least two drivers within a single earpiece. If a pair of drivers is used, each driver has a discrete sound delivery tube. If more than two drivers are used, preferably the outputs from the two lower frequency drivers are merged into a single sound delivery tube while the output from the third driver is maintained in a separate, discrete sound tube. To compensate for the inherent phase shift of the earpiece the lengths of the sound delivery tubes, and thus driver offset, are regulated. Further audio performance optimization can be achieved through an iterative process of measuring the performance of the earpiece and making further, minor adjustments to the sound delivery tube lengths. The sound delivery tubes can include transition regions. The earpiece is configured to use removable / replaceable eartips. Acoustic filters can be interposed between one or both driver outputs and the earpiece output.

An intraluminal device implantable in a body lumen having an atheroma therein in the vicinity of a side-branch vessel includes a mesh-like tube of bio-compatible material formed with liquid-permeable window openings. The mesh-like tube has an expanded condition in which the tube diameter is slightly larger than the diameter of the body lumen in which it is to be implanted, and the tube length is sufficient to cover the atheroma and the side-branch orifice, and to be anchored to the body lumen around the periphery of the atheroma, and a contracted condition wherein it is sufficiently flexible so as to be easily manipulatable through the body lumen to the site of the atheroma. The mesh-like tube, in its expanded condition, has window openings of a size and distribution such as to structurally stabilize the atheroma and to keep embolic material originating from the atheroma in place on the wall of the body lumen, while diverting embolic material of predetermined size present in the blood flowing through the mesh-like tube from the side-branch orifice, without substantially impeding the blood flow, or increasing the thrombogenitic properties, of the blood flowing into the side-branch orifice.

A modular system is described for construction of fluid applicators for open or endoscopic surgery from modular components. Lengths of tubing of various lengths, and devices to be carried by said tubing, are pre-fitted with standard adapters to mate with each other, thereby forming cannula sections and applicator sections. Interconnectors may also be provided, particularly for provision of articulation. The tubing is preferably rigid, but may also be either flexible or permanently bendable. A device can then be constructed by selection of a suitable set of tubing lengths, adapters and applicators. Devices customizable for particular uses can be created with minimal expense. The system is especially suitable for delivery of fluids to tissue in endoscopic or other minimally invasive surgical procedures. Delivery of fluids forming structure at a tissue site, especially as a hydrogel, is a preferred use of the devices.

A method of optimizing the audio performance of an earpiece and the resultant device are provided. The disclosed earpiece combines at least two drivers within a single earpiece. If a pair of drivers is used, each driver has a discrete sound delivery tube. If more than two drivers are used, preferably the outputs from the two lower frequency drivers are merged into a single sound delivery tube while the output from the third driver is maintained in a separate, discrete sound tube. To compensate for the inherent phase shift of the earpiece the lengths of the sound delivery tubes, and thus driver offset, are regulated. Further audio performance optimization can be achieved through an iterative process of measuring the performance of the earpiece and making further, minor adjustments to the sound delivery tube lengths. The sound delivery tubes can include transition regions. The earpiece is configured to use removable / replaceable eartips. Acoustic filters can be interposed between one or both driver outputs and the earpiece output.

The invention relates to a method for preparing an ordered porous anodic titanium dioxide nanotube array. The method can prepare an ultra-large area defect-free titanium dioxide nanotube array film, the surface layer is the porous shape like an anodic aluminum oxide template, and the lower layer is a nanotube ordered array, thereby overcoming the common problems of easy lodging and aggregation of tubes in the prior art of preparing the anodic titanium dioxide nanotube array and simultaneously solving the problems that the prepared nanotube array film has more surface defect corrosion pits and the sediment blocks tube mouths. The nanotube array can realize the controllable growth by controlling the preparation conditions and the process and obtain the ordered array films with different tube diameters, different wall thicknesses and different tube lengths. The diameter range of the nanotubes is 20-200nm, the wall thickness range is 5-30nm, and the length range of the titanium dioxide tubes is 100nm-1mm. The invention particularly relates to a technology which can effectively and completely strip the titanium dioxide array film, effectively strip a titanium substrate from the TiO2 nanotube array and obtain the different sizes of porous nanotube array self-support films.

A fluid delivery assembly transfers fluid from a first fluid-filled container filled to a second fluid container. The fluid delivery assembly includes a tube extending through a tube length between a base end which is fixedly secured to one of the first and second fluid containers and a distal end. The tube has an inner surface defining a tube contour. The fluid delivery assembly also includes a mating yoke secured to the other containers. The mating yoke defines a body periphery correlating to the tube contour such that the mating yoke in the one fluid containers is received within the tube and is capable of moving along the tube length until the first and second fluid containers are in fluid communication. Another aspect of this invention is it incorporates a container which eliminates the need for an exposed needle to draw the medicine out of the container.

A medication delivery apparatus and method for a continuous positive airway pressure (CPAP) system such as used in emergency treatment of severe respiratory distress. The apparatus of the invention includes a 3-port Tee fitting, one port of which is connected to the inlet port of a CPAP face mask operable at an elevated pressure. A second port is connected to a CPAP gas conduit supplying an oxygen-containing gas at a pressure above atmospheric. The third port is connected to a flexible tube receiving aerosolized medication from an upper outlet of an openable / refillable lightweight nebulizer. The flexible tubing is only long enough to bend vertically downward to support a lightweight nebulizer in a vertical attitude, whereby full nebulization takes place, no medication is spilled, and the tubing length is minimized for maximal transfer of medication to a patient. In addition, cutting of the CPAP gas supply tube and placement of a T fitting between the cut ends, with its concomitant wastage of condensed medication, is avoided. The patient head does not need to be in an upright position. The patient's airway is continuously maintained at an elevated pressure to maintain an open airway and oxygenate the patient, permitting repeated doses of nebulized medications at independently controlled nebulization rates, minimizing downtime of both the pressurized oxygen and aerosolized medication.

The invention discloses a method by which titanium dioxide nanometer tube array layer is prepared on surface of titanium base material, wherein the titanium base materials undergo the surface pretreatment and receive the electrochemistry anodic oxidation treatment in the electrolyte containing the HF acid, the components of the mixed electrolyte are that the ammonium dihydrogen phosphate is 1 to 3mol / L and the hydrofluoric acid is 0.2 to 0.4mol / L, as a result, the amorphous form titanium dioxide nanometer tube surface structure is achieved; the subsequent heat treatment condition is that under air atmosphere, the rate of temperature rise is 3 DEG C / min, the heat is preserved for 3 hours at the temperature of 450 DEG C, the anatase titanium dioxide nanometer tube array layer is achieved after being cooled in the furnace to the room temperature. The electrolyte system prepared based on the method of the invention can control the balance of oxidation and the corrosion within a relatively long time, thereby preferably realizing the control on the shape of the titanium dioxide nanometer tube. The invention has the advantages of easy operation, low cost and orientated and order distribution of the prepared titanium dioxide nanometer tube array; moreover, the amorphous form titanium dioxide nanometer tube is generated normal to the direction of the base; the tube diameter is 80 to 100nm, the wall thickness is 18 to 21nm, the tube length is 0.7 to 2.0um, thereby the specific surface area is large.

An expandable tubing assembly comprises a tubular connector defining overlapping longitudinal slots, the connector comprising end portions and an intermediate portion. The slots extend over the whole length of the connector, but the only slot overlap occurs in the intermediate portion. The assembly further comprises lengths of expandable tubing defining overlapping longitudinal slots and having end portions defining nodes between and beyond the ends of the tubing slots. Tubing threads are formed on the end most tubing nodes. The connector end portions define threads and are coupled with the threads formed on the nodes of the respective end portions of the tubing lengths.

A universal calibration apparatus and method to estimate the dispense output from a low volume, non-contact, liquid dispensing systems that may be applied for every hardware configuration (e.g., tube length, orifice diameter, tip design, etc), reagent solution property and environmental condition. This same calibration technique is applied to calibrate or tune these non-contact liquid dispensing systems to dispense desired volumes (in the range of about 0.050 μL to 50 μL), irrespective of the hardware configuration or the solution properties. That is, the calibration technique is not dependent on any variables, but the result (the actual dispense volume) is dependant on the variable mentioned. By actuating selected pulse widths, and measuring the resulting volume, a Calibration Profile can be generated correlating the liquid volume dispensed from the orifice to the respective pulse width of the dispensing valve thereof through calibration points. In particular, one is selected to deliver a first volume of liquid that is less than a lower base pulse width correlating to the lowest volume of the selected range of volumes of liquid, while a second pulse width is selected to deliver a second volume of liquid dispensed that is greater than an upper ceiling pulse width correlating to the highest volume of the selected range of volumes of liquid. Intermediary pulse widths are also applied, each selected to deliver a different, spaced-apart, respective intermediary low volumes of liquid dispensed from the dispensing orifice between the first volume and the second volume. Thus, applying the Calibration Profile, the pulse widths correlating to the one or more targeted discrete volumes for liquid dispensing can be extrapolated.

The invention relates to a positive electrode and positive electrode paste with high energy density, and a battery containing the positive electrode, in particular to the positive electrode paste with high energy density, belonging to the technical field of batteries. The positive electrode paste with high energy density comprises the following constituents based on weight: 100 parts of positive active substance, 0.01-0.1 part of composite conductive agent, 0.4-3.0 parts of adhesive and 30-50 parts of solvent, wherein the composite conductive agent comprises a single-walled carbon nanotube and graphene, the mass ratio of the single-walled carbon nanotube to the graphene is (0.1-10):1, the specific surface area of the single-walled carbon nanotube is 500-700 m<2> / g, the tube diameter is 0.7-1.8 nanometers, the tube length is more than 5 micrometers, and the specific surface area of the graphene is over 2,000 m<2> / g. Compared with the prior art, the positive electrode paste has the advantages that by adjusting the formula and the dosage of the conductive agent, the energy density can be effectively improved, and the cost is relatively low.

A flexible pneumostoma management device maintains the patency of a pneumostoma while controlling the flow of material through the pneumostoma. The pneumostoma management device includes flange attaches to the chest of the patient to secure the device in position. The pneumostoma management device also includes a tube which enters the pneumostoma to allow gases to escape the lung. The length of the tube is selected to match the dimensions of the pneumostoma of a patient. In order to manufacture devices having different tube lengths, the tube is formed at a longer length than required, cut to size and tipped. The tube may be formed by molding or extrusion.

A milling head for a milling device, particularly a rotary milling device, wherein the milling head is capable of imparting a desired finish on a tube, preferably of a heat exchanger tube. The milling head includes one or more milling elements capable of cutting and / or removing heat dissipating elements connected to an outer surface of the tube. The heat dissipating elements are removed from the tube in a longitudinal direction along the tube length. In one embodiment, the milling head also includes a bevel milling element. Methods for milling a tube having heat dissipating elements are also described.

An easily manufactured large boom construction includes a plurality of main tube support sections fabricated from plate material of differing material thickness, grade and section dependent on load. The tube support sections include apertured areas which provide a preliminary snap-fit of the main tubes to significantly reduce need for additional fixturing. The opposite ends of diagonal tubes pass through apertures in the fabricated support sections for accurate tube location without complicated weld fixtures or precise tube length and cut end angle tolerances. The tubes are welded on opposite sides of the sections to eliminate need for tube-to-tube connections or connections wherein a cut end edge has to be precisely placed against a planar surface. An inverted right triangle boom cross section with wing over-top fold configuration ability provides strength, stiffness and infinite nozzle placement possibilities.

The invention discloses a method of preparing a titanium dioxide nanotube with assistance of a cationic surface active agent. The method comprises: adding titanium dioxide powder and hexadecyl trimethyl ammonium bromide into a polytetrafluoroethylene hydrothermal reaction kettle filled with a strong base solution according to a weight ratio of 1:1-1:5, uniformly mixing the ingredients, reacting at 100-200 DEG C for 15-30hours, performing acid treatment, washing, filtering, drying and burning the ingredients to obtain the titanium dioxide nanotube. The titanium dioxide nanotube is efficiently prepared by a soft template combining with a hydrothermal method. The length of the prepared titanium dioxide nanotube is hundreds of nanometers, the outside diameter is about 10nm, the inside diameter is about 5nm, the titanium dioxide nanotube contains 2-5 layers of tube walls and two open ends. Compared with the titanium dioxide nanotube prepared by a common hydrothermal method under the same condition, the tube length is obviously increased, the tube diameter is more uniform, the draw ratio is large, the tube forming efficiency is high and the aggregation condition is alleviated, thereby being very beneficial for application of the titanium dioxide nanotube in various fields.

The invention discloses a gas sensor based on photoacoustic spectrometry, comprising a circuit matched and connected with a light source (1) and a quartz tuning fork (13). The gas sensor is characterized in that an acoustic resonator (6) is composed of a main tube (11) with a branch tube (12) which are communicated with each other vertically; the tube axis of the main tube (11) is coaxial with a light path (2), the tube length of the main tube (11) is 4.57-7.87 mm, and the tube inner diameter of the main tube (11) is 0.4-1.5mm; the tube length of the branch tube (12) is 1-2mm and the tube inner diameter of the branch tube (12) is 0.4-0.5mm; the focus of a focusing lens (4) is located at the communicated part of the main tube (11) and the branch tube (12); the plane and the slit centre of a tuning fork arm (131) of the quartz tuning fork (13) are vertical to and located in the axis of the branch tube (12) respectively, and the distance between the plane of the tuning fork arm (131) and the tail port of the branch tube (12) is 20-50mu m; and the slit width of the tuning fork arm (131) of the quartz tuning fork (13) is 0.28-0.32mm, and the resonant frequency of the tuning fork arm (131) of the quartz tuning fork (13) is 31.768-33.768kHz. The gas sensor based on photoacoustic spectrometry realizes coupling between a light-excited acoustic energy and the quartz tuning fork with the highest efficiency and can be used for the field of trace gas detection.

A recirculating pet fountain that includes a basin, pump and discharge where water pumped out the discharge is either received by an overflow tube and / or conveyed by a bridge toward water in the basin including into the tube. The bridge can include a channel and be configured so at least some discharged water clings to its underside via surface tension as water flows toward the basin. The tube has a mouth which can receive water from the bridge that can be free falling water that overflows from the tube into the basin. The tube can include one or more discharge ports that can include flow directors that help direct flow of water received in the tube that overflows out the ports. The tube can be length extensible and can include a flow adjuster that can increase effective tube length and can block one or more ports.

A fluorescent lamp 1 comprises: a bulb 2 formed by heating bent-portion-formation preordination portions of a single straight-tube-shaped bulb 2a having an external tube diameter of 12 to 20 mm and a tube length of 800 to 2500 mm, forming a plurality of bent portions 2c and straight tube portions 2b adjacent to the bent portions 2c by bending processing, such that the straight portions 2b are disposed generally within the same plane by way of the bent portions 2c, forming in close proximity a pair of end portions 2d and 2d with electrodes 5 and 5 sealed in so as to form a single discharge path through the straight tube portions 2b and bent portions 2c, forming a phosphor layer 4 on the inner face of the bulb, and sealing a discharge medium including mercury; and a base 6 provided on the end portions 2d and 2d of the bulb 2; whereby thermal deterioration of the phosphor layer 4 formed at the straight tube portions 2b is reduced so deterioration of the initial light flux is suppressed, allowing lighting at higher efficiency. According to the above configuration, a fluorescent lamp which is compact and capable of light with high efficiency, and with improved light output properties, and a light fixture using this fluorescent lamp, can be provided.

A catadioptric lens barrel structure for a projection exposure apparatus includes first and second lens barrels. Each of the lens barrels has an optical axis. The optical axes run parallel to each other. The lens barrel structure also includes a third lens barrel transversely connecting the first lens barrel to the second lens barrel. A reticle is placed in front of an entrance end of the first lens barrels and a wafer is placed in front of an exit end of the second lens barrel. Each lens barrel has a center plane perpendicular to the corresponding optical axis at a position half-way along the length of the corresponding lens barrel. A lens barrel support structure firmly secures the plurality of lens barrels. The lens barrel support structure is made of a material having a low coefficient of thermal expansion. The support structure includes first and second support platforms to support the first and second lens barrels, respectively, near the corresponding center planes to minimize errors due to temperature changes, vibrational motion, or other external forces.

The invention discloses a NiCo2O4 mesoporous nanotube material grown on carbon fiber cloth. The NiCo2O4 mesoporous nanotube material grows on a carbon fiber cloth substrate and is composed of NiCo2O4 nano crystals with a particle size of 5 to 10 nm; the internal diameter of the NiCo2O4 mesoporous nanotube material is 20 to 50 nm, the wall thickness is 10 to 20 nm, the tube length is 0.5 to 2.0 [mu]m, and the length / diameter ratio is 250 to 1000; the mesopores are gaps between the NiCo2O4 nano crystals and the size of the mesopores is in a range of 2 to 5 nm. The invention further provides a preparation method of the NiCo2O4 mesoporous nanotube material. By precisely controlling the hydrothermal reaction conditions, the NiCo2O4 mesoporous nanotube material with a special structure can grow on carbon fiber cloth. The NiCo2O4 mesoporous nanotube material can be used to produce the electrode of a super capacitor, and has the advantages of high specific capacitance, rate capability under a large current density, and long-term cycle performance.

The invention provides an air-cooled heat pump circulating system and relates to heat exchangers of refrigeration systems. Air-cooled finned tube heat exchangers serve as the air-cooled heat pump circulating systems of both a condenser and an evaporator. The air-cooled heat pump circulating system comprises a shell-and-tube heat exchanger, an air-cooled finned tube heat exchanger, a compressor, a gas-liquid separator, a four-way reversing valve, a refrigeration non-return valve, a heating non-return valve, a refrigeration expansion valve, a heating expansion valve, a heating inspiration non-return valve, an exhaust corner valve, a liquid path stop valve and a liquid path drying filter, wherein the air-cooled finned tube heat exchanger is provided with a condenser gas header / evaporator gas return header, a condenser collector tube / evaporator gas return header, a condenser secondary distribution collector tube / evaporator liquid distribution header, a shunt head and shunt tube, a condenser exhaust head tube / evaporator gas return head tube and a condenser liquid phase tube. The air-cooled heat pump circulating system comprises two circulation processes of heating and refrigeration. In the two processes, the air-cooled finned tube heat exchanger has different single-circuit heat exchange tube lengths, circuit quantities and in-tube refrigerant mass velocities, and meanwhile, the heat transmission efficiency is optimized.

A method for measuring the effects of fouling of heat transfer tubes in heat exchangers where a cooling fluid at lower temperature is removing heat from another fluid at higher temperature includes placing a nonrestrictive mass flow rate and temperature measuring tube extension sensor on a tube outlet end; obtaining the tube inlet temperature for deriving the rise in fluid temperature; analytically computing the amount of heat transferred from the hot fluid to the cold fluid; from tube length, inside and outside tube diameter, analytically deriving the tube heat transfer coefficient; and determining tube fouling factor, the value of which is the fraction of the clean tube heat transfer coefficient available for transferring heat, by dividing the heat transfer coefficient by the known heat transfer coefficient of an unfouled tube.

Providing a method of hydroforming a tube where the hydroformed diameter is less than the tube length and a hydroforming die having two or more die members having an internal shape same as the tube shape and an internal cavity having the desired formed shape. Where the said die members are movable to an opened and closed position such that the tube is placed inside the die members cavities and the tube ends are sealed and hydraulic pressure source is connected to the interior of the tube and thereby expanding the tube so as to conform to the shape of the said die members cavities. And where the directions of opening and closing of the said die members are in the direction of the said tube axis such that the amount of force necessary to hold the die members in a closed position during said step of expanding, is kept to a minimum.

The invention discloses a chirality mesoporous organic high molecular material with an even and adjustable diameter and a preparation method thereof, and the organic high molecular material is polypyrrole, polyaniline or polymetaphenylene isophthamide. By using an acid or salt negative ion surface activating agent as a moulding board agent, the guide agent with a supra molecula body structure is assembled under the existence of acid by self, and then different organic monomers and initiators are added to prepare out a functionalization organic high molecular material, the tube length of which is 2 to 20 micrometers, the diameter of the tube inner wall is 5 to 20 nm, the thickness of the tube wall is 30 to 100nm, the pitch is 50 to 500 nm, the specific surface area is 20 to 100m<2>g<-1>, the pore volume is 130 to 230 mm<3>g<-1>, and the pore channel and the external surface have the same spiral structure, and the diameter is even. The invention has wide application prospect in the fields of the molecular recognition, the sensor and the catalyzing, etc.