32results about How to "Avoid excessive diameter" patented technology

A fluid infusion device and a method of using the same. The device includes an outer, flexible guide catheter having a distal end for introduction beneath the skull of a patient and a proximal end remaining external of the patient. A flexible infusion fiber is located within the guide catheter and has a distal end extending outwardly from the guide catheter to be located in a target area within the patient's brain. The infusion fiber can be fixed or axially movable within the guide catheter. In the latter embodiment, the proximal end of the infusion fiber extending outwardly from the guide catheter can be manipulated to locate the distal end of the infusion fiber in the target area. An infusion pump is connected to the proximal end of the infusion fiber to infuse a minute quantity of fluid at an extremely low flow rate into the brain of the patient.

An objective is configured with a first partial objective and a second partial objective. The first partial objective, which projects a first field plane onto an intermediate image, has a first, convex mirror and a second, concave mirror. The second partial objective, which projects the intermediate image onto a second field plane, has a third and a fourth mirror, both concave. All of the four mirrors have central mirror apertures. The axial distance between the first and second mirrors is in a ratio between 0.95 and 1.05 relative to the distance between the second mirror and the intermediate image. The axial distance ZM3-IM between the third mirror and the second field plane conforms to the relationship 0.03·DuM3+5.0⁢ ⁢mm<ZM3-IM<0.25·DuM3tan⁡(arcsin⁡(NA)).NA represents the numerical aperture NA in the second field plane, and DuM3 represents the diameter of the third mirror. The objective furthermore has a Petzval radius with an absolute value larger than the distance between the first and second field planes.

An objective is configured with a first partial objective and a second partial objective. The first partial objective, which projects a first field plane onto an intermediate image, has a first, convex mirror and a second, concave mirror. The second partial objective, which projects the intermediate image onto a second field plane, has a third and a fourth mirror, both concave. All of the four mirrors have central mirror apertures. The axial distance between the first and second mirrors is in a ratio between 0.95 and 1.05 relative to the distance between the second mirror and the intermediate image. The axial distance ZM3-IM between the third mirror and the second field plane conforms to the relationship <math-cwu id="MATH-US-00001"> <NUMBER>1< / NUMBER> 0.03 · Du M3 + 5.0 ⁢ ⁢ mm < Z M3 - IM < 0.25 · Du M3 tan ⁡ ( arcsin ⁡ ( NA ) ) . <mathematica-file id="MATHEMATICA-00001" file="US20040114217A1-20040617-M00001.NB" / > <image id="EMI-M00001" wi="216.027" he="18.00225" file="US20040114217A1-20040617-M00001.TIF" imf="TIFF" ti="MF" / > < / MATH-CWU> NA represents the numerical aperture NA in the second field plane, and DuM3 represents the diameter of the third mirror. The objective furthermore has a Petzval radius with an absolute value larger than the distance between the first and second field planes.

A fluid pump, in particular for the coolant and heating system of a motor vehicle, has a stator (21) of claw pole construction and a rotor (6), separated from the stator (21) by a pipe (11), which is immersed in the coolant and forms a vane wheel. The rotor (6) is disposed radially inside the stator (21).

A urological resectoscope having an axially extending shaft tube, the proximal end thereof being fixed to a main body. A sliding body is proximally positioned in relation to the main body, and can slide in a parallel manner in relation to the axis thereof. The sliding body includes a receiver, a fixing device and a contacting device. An electrode that can be subjected to a high frequency, including a rigid electrode carrier having one external, insulated conductive wire, can be positioned in the resectoscope such that it can axially slide beyond the distal end of the shaft tube. In the assembly position, the electrode carrier extends through the shaft tube and the main body into the receiver, and can be fixed by the fixing device and contacted by the contacting device. The fixing device is proximally arranged in relation to the contacting device on the sliding body.

A hyperboloid contact socket is provided which comprises a tubular body of conductive material and preferably having at one end a lip defining an entrance aperture for receiving a mating pin terminal and having on the opposite end a termination of an intended configuration for attachment to a circuit board or other device or item. The tubular body contains a plurality of conductive wires conductively and permanently affixed at their respective ends torespective inner surfaces at or near the outer and inner ends of the body and disposed in an angular disposition to the longitudinal axis to form the shape of a single sheet hyperboloid. In one aspect of the invention a mandrel employed to orient the wires within the tubular body during fabrication of the contact socket remains attached to the tubular body after assembly of the contact wires and serves as a connecting pin to which various terminations can be attached.

An integral system to utilize the flow of water, fresh or ocean, to generate electric power from river flow or tidal currents, consisting of three parts, an especially designed impeller to convert the water flow into rotary mechanical motion, a totally encapsulated alternator / generator, and a pedestal upon which the entire device is mounted which is set into the sea bed or river bed and which is fitted with a swivel bearing which allows a limited rotation of the alternator / impeller assembly, and with fins to keep the impeller pointed into the existing current and which also serve as heatsinks for the alternator / generator.

Tubular pipe insulation is made from a glass fiber mat produced utilizing a rotary glass fiberization process. A spinner disc is rotated to centrifuge molten glass through fiberization holes in an annular sidewall of the spinner disc and form primary glass fibers. The primary glass fibers are attenuated and formed into a veil where the fibers are dispersed to reduce in length the fiber networks formed from the fibers. Binder is applied to the fibers and the fibers are collected into a mat that, when pulled apart by longitudinally directed, opposing forces, separates across the width of the mat into two mat sections having feathered edges with substantially no fibrous stringers extending beyond the feathered edges for a distance greater than about four inches. The leading mat section is then wound about a mandrel and the binder in the mat is cured to form the pipe insulation.

A plug for sealing high pressure tubes is made from a memory-shape alloy. The plug is formed having a diameter greater than the inner diameter of the tube and is shaped by cooling to its martensite finish temperature and bending its wings in opposing directions such that at a later time, it will fit within the tube. After insertion into the tube, the plug is heated to its austenite finish temperature, restoring its wings to almost their original shape, thereby exerting force onto the tube walls, sealing the tube from leakage.

Graphene oxide quantum dots (GOQDs) a composite nanomaterial formed by the GOQDs with graphene and / or graphene-like structure(s), and methods for preparing them are provided. The method for preparing GOQDs comprises providing a carbon-based 3D bulk material having a graphite layer structure as an anode, positioning an end face of the material in contact and parallel with the liquid surface of an electrolyte solution, and intermittently or continuously cutting and exfoliating graphite layers at the end face by electrochemical oxidation to obtain GOQDs. The method for preparing the composite nanomaterial comprises adding powder comprising graphite and / or graphite-like layer structure(s) to a solution of GOQDs; under an assistant mechanical action of high shearing force, subjecting the GOQDs adsorbed onto the graphite and / or graphite-like layer structure(s) in the solution to a cycle of exfoliation, re-adsorption, and re-exfoliation, to obtain a composite nanomaterial formed by quasi-zero and / or quasi-two dimensional graphene and / or graphene-like structure(s) and GOQDs.

A jewelry article comprising: a gemstone and a shape memory alloy collet. The gemstone comprises a girdle dividing the gemstone into a pavilion and a crown having a table surface; and a continuous groove located in the pavilion and parallel to the girdle, the continuous groove has a first surface and a second surface, the first surface is substantially parallel to the table surface, the first surface and the second surface of the groove form a first angle. The shape memory alloy collet has a mounting rim, the mounting rim has an inner surface and a top surface defining an opening of the shape memory alloy collet, the inner surface and the top surface form a second angle, the second angle corresponds substantially to the first angle, and a profile of the mounting rim corresponds substantially to a profile of the continuous groove.

A method for manufacturing an electrical cable provides an electrical cable suitable for use in heating wells. An elastomeric jacket is extruded over insulated conductors. A stainless steel plate is rolled around the jacket to form a cylindrical coiled tubing having a seam. The seam is welded, then the tubing is swaged down to a lesser diameter to cause the tubing to frictionally grip the jacket. A recess maybe formed in the jacket adjacent the seam to avoid heat damage from the welding process.

A door operator comprises a rotary shaft, a chain disk for rotating the rotary shaft, and a locking mechanism for locking the rotary shaft. The locking mechanism comprises a bidirectional rotary block, a plurality of push pins and anti-rotation posts. When the chain disk rotates, the push pins urge the bidirectional rotary block to rotate the rotary shaft, and when the rotary shaft rotates, the of anti-rotation posts lock the bidirectional rotary block, and preclude the rotary shaft from rotating.

In an electrical plug connector in the form of a socket contact, having an inner contact part for the electrical contacting of a pin and having an external retention spring surrounding the inner contact part, the inner contact part is formed of nickel brass.

Eccentricity of a optical fiber installed in a passageway of a ferrule is minimized by imposing a force on the end of the optical fiber projecting from the passageway at the ferrule end face to push the optical fiber to a desired position in the passageway, prior to curing an adhesive used for fixing the optical fiber in the passageway, so as to compensate for eccentricity of the passageway. In one embodiment, the force is imposed on the optical fiber by hanging a weight on the optical fiber. In another embodiment, the force is imposed on the optical fiber by using a pressurized jet of fluid. The point of application of the force, the magnitude of the force, and the viscosity of the adhesive are selected such that minimal optical fiber bending occurs, thereby assuring that the optical fiber is positioned at the desired position in the passageway for an appreciable distance from the ferrule end face along the passageway.

A system for mounting a scaffold on a balloon catheter includes two positioning and alignment stations, which are used to prepare a scaffold and catheter for crimping using the same crimping head. The system is configured for automated assembly of the scaffold and catheter prior to crimping and performing post-crimping inspection for the crimped scaffold and prior to placing a restraining sheath over the crimped scaffold.

A image intensifier binocular, so-called goggle, of the type having only one image intensifier tube (2) is working with an effective diameter of its entrance photocathode (3) below 15 mm and therefore an objective (1) having an accordingly shortened focal length. This combination will substantially increase the depth of field of the goggle and also enable a design of smaller weight.

There is disclosed a method of manufacturing an optical fiber whose core is made of multi-component glass without fluctuation in its outer diameter and occurrence of sudden breakage thereof, with a technique of unifying a core rod and a cladding tube at the time of drawing, and yet drawing them; and the optical fiber having a multi-component glass core are disclosed.

A door operator comprises a rotary shaft, a chain disk for rotating the rotary shaft, and a locking mechanism for locking the rotary shaft. The locking mechanism comprises a bidirectional rotary block, a plurality of push pins and anti-rotation posts. When the chain disk rotates, the push pins urge the bidirectional rotary block to rotate the rotary shaft, and when the rotary shaft rotates, the of anti-rotation posts lock the bidirectional rotary block, and preclude the rotary shaft from rotating.

Pipeline for transportation of gas, for which the supplying pressure for the gas out through an outlet shall not exceed a threshold value, where the pipeline comprises a safety unit with a pressure transmitter and a temperature transmitter arranged in connection to the pipeline close to an inlet of the pipeline, distinguished in that the safety unit comprises a device for measuring the flow rate and the safety unit is either used for maintaining an increased inlet pressure to the pipeline and / or in order to use a pipeline with a reduced inner diameter, within a given safety level against leakage and excessive pressure.

A turbocharger includes ported shroud compressor housing disposed about a compressor wheel, having an air inlet passage extending axially along and circumferentially about a longitudinal axis, volute base portion operably adjacent to compressor wheel, contour that encircles and complementarily matches compressor wheel, inducer including ring and plurality of extending members, inlet section extending from volute base portion, and recirculation cavity formed in volute base portion and inlet section with a recirculation slot and inlet slot for reentry of airflow into inlet section. The ring has an inner wall surface defining a first section extending axially along the longitudinal axis and proximate to the compressor wheel, second section extending from first section radially away from longitudinal axis, and third section extending from second section along longitudinal axis and distal to the compressor wheel. The inlet section has a first diameter and third section has a second diameter greater than first diameter.

The invention discloses a small high-speed hydraulic oil cylinder which comprises an oil cylinder body and an oil cylinder head connected to the oil cylinder body, wherein a cylinder tube is arranged in the oil cylinder body, a first oil hole is formed in the oil cylinder head, a second oil hole is formed in the oil cylinder body, the first oil hole is communicated with the top of the cylinder tube, and the second oil hole is communicated with the bottom of the cylinder tube; a piston is coaxially nested in the cylinder tube and comprises an upper end and a lower end, the diameter of the upper end is larger than that of the lower end, the upper end is erected on a step surface at the bottom of the cylinder tube, a mounting groove is formed in the top surface of the upper end, a mounting hole is formed in the bottom surface of the lower end and communicated with the mounting groove, a valve needle is arranged in the mounting groove, one end of the valve needle is erected in the mounting groove, the other end is arranged in the mounting hole, and the upper end of the valve needle is fixed in the mounting groove through a limit block; and a snap spring is connected to the outer wall of the lower end in a sleeving manner. By means of the small high-speed hydraulic cylinder, positions of rubber feed points of a small plastic product are closer, and when a needle valve hot runner system is adopted, the problem that no space is reserved for accommodating the traditional oil cylinder due to overlarge diameter can be solved with application of the cylinder.

A fluid infusion device and a method of using the same. The device includes an outer, flexible guide catheter having a distal end for introduction beneath the skull of a patient and a proximal end remaining external of the patient. A flexible infusion fiber is located within the guide catheter and has a distal end extending outwardly from the guide catheter to be located in a target area within the patient's brain. The infusion fiber can be fixed or axially movable within the guide catheter. In the latter embodiment, the proximal end of the infusion fiber extending outwardly from the guide catheter can be manipulated to locate the distal end of the infusion fiber in the target area. An infusion pump is connected to the proximal end of the infusion fiber to infuse a minute quantity of fluid at an extremely low flow rate into the brain of the patient.

Graphene oxide quantum dots (GOQDs), a composite nanomaterial formed by the GOQDs with graphene and / or graphene-like structure(s), and methods for preparing them are provided. The method for preparing GOQDs comprises providing a carbon-based 3D bulk material having a graphite layer structure as an anode, positioning an end face of the material in contact and parallel with the liquid surface of an electrolyte solution, and intermittently or continuously cutting and exfoliating graphite layers at the end face by electrochemical oxidation to obtain GOQDs. The method for preparing the composite nanomaterial comprises adding powder comprising graphite and / or graphite-like layer structure(s) to a solution of GOQDs; under an assistant mechanical action of high shearing force, subjecting the GOQDs adsorbed onto the graphite and / or graphite-like layer structure(s) in the solution to a cycle of exfoliation, re-adsorption, and re-exfoliation, to obtain a composite nanomaterial formed by quasi-zero and / or quasi-two dimensional graphene and / or graphene-like structure(s) and GOQDs.

To manufacture a metal can having a tear-open lid and having a storage space for an object above the tear-open lid, the following procedure is used: first, a top edge of the can which has a smaller diameter than the inside diameter of the can body is formed, wherein a transition region (6) is formed. After the tear-open lid has been attached, this transition region is deep drawn so that the tear-open lid (2) is displaced towards the bottom (5) of the can. This produces the storage space. This procedure allows previously formed tear-open lids to be used, which safely guarantees the imperviousness of the seal of the tear-open lid.

The present invention provides a carboxylated nanodiamond-mediated CRISPR-Cas9 delivery system for gene editing comprising nanodiamond (ND) particles as the carriers of CRISPR-Cas9 components designed to introduce the mutation in a given gene for repairing a tissue damage.