399results about How to "Increase inner diameter" patented technology

A dual braided catheter shaft includes a flat wire forming the inner braid, thereby potentially allowing for reduced radial thickness of the shaft. In one embodiment, the shaft (100) includes an inner polymer jacket (104), an inner braid (106) formed on the inner jacket (104), an intermediate jacket (108) formed over the inner braid (106), an outer braid (110) formed on the intermediate jacket (108) and an outer jacket (112) formed on the outer braid (110). A preferred construction process involves extruding polymer material directly onto each of the inner and outer braids (106 and 110) so that little or no air gaps remain between the polymer material and the braids (106 and 110). The braiding parameters of the inner and outer braids (106 and 110) can be varied along the length of the catheter to provide varying mechanical properties.

The present invention provides a method and apparatus for deforming a tubular body, running the tubular body through a restriction in a wellbore, reforming the tubular body, and expanding at least a portion of the tubular body past its elastic limit. In one aspect, the present invention provides a method for forming a substantially monobore well involving deforming a tubular body, running the tubular body below a restricted inner diameter portion, reforming the tubular body, and expanding at least a portion of the tubular body past its elastic limit. The restricted inner diameter portion may comprise a casing string previously disposed within the wellbore or a casing patch. The at least the portion of the tubular body expanded past its elastic limit may be a lower portion of the tubular body. Subsequent tubular bodies may be reformed and expanded below previous tubular bodies.

The invention relates to a positive electrode material of a lithium-sulfur battery and a preparation method for the positive electrode material, wherein the positive electrode material takes halloysite as a sulfur carrier; the preparation method comprises the steps of enlarging the inner diameter of the tube cavity of the halloysite by acid etching; then filling the tube cavity of the halloysite with sulfur by a liquid phase chemical deposition method and a thermal processing two-step method to form a halloysite/sulfur composite material; and then preparing and obtaining the halloysite-based lithium-sulfur battery positive plate. The halloysite is large in specific surface area, high in adsorption capacity and unique in the micropore structure, so that polysulfide generated in the charging-discharging process of the lithium-sulfur battery can be limited in the tube cavity of the halloysite, the volume expansion of sulfur in the charging-discharging process is restrained, and the capacity and the cycling stability of the battery are greatly improved; in addition, the preparation process is simple; and in addition, the halloysite nanotube is a natural environment-friendly material, low in cost and easily available, so that the industrial production of the lithium-sulfur battery can be realized conveniently.

The invention discloses a production formula and method of a PVDF (polyvinylidene fluoride)/carbon nano-tube super-hydrophobic membrane. The formula includes, by weight, 5% to 30% of PVDF, 0.005% to 5% of carbon nano-tubes, and 67% to 91% of solvent. The production method includes: evenly dispersing the carbon nano-tubes in the solvent, adding the PVDF, and performing high-speed stirring at 50 DEG C to 100 DEG C to obtain casting solution; producing a flat membrane by scraping, or producing hollow fibers to obtain a primary membrane via a hollow spinneret; solidifying the primary membrane in the non-polar steam environment, and removing solvent residue by deionizing soaking so as to obtain the PVDF/carbon nano-tube super-hydrophobic membrane. The membrane produced by the formula and the method is rich in CNTs on surface and has super-hydrophobic surface and excellent permeability; the method is simple, and operability is high.

To provide a blind rivet fastening device that makes it easy to mount a blind rivet in the nose and that keeps the mounted blind rivet from falling out of the nose.

When the nose is connected slidably to the tool housing in the axial direction, the nose resists the action of the elastic pushing means and is slid so as to be pulled rearward in the axial direction, and the jaw is pulled rearward in the axial direction in the jaw guide. When this has occurred, the inner diameter of the jaw is increased, the mandrel is easily inserted into the jaw, the force pulling the nose rearward in the axial direction is released, the jaw is returned forward axially in the jaw guide by the pushing force of the elastic pushing means, and the inner peripheral surface of the jaw is frictionally engaged with the mandrel.

The invention provides a concrete beforehand pore-forming static breaking technology. A plurality of containers with a certain sizes, shapes and amounts are embedded in a concrete member before the concrete is cast, a plurality of orifices are arranged above the containers, the inner diameters of the orifices are less than the inner diameters of the containers, and the orifices are extended to the edge of the concrete member. When the concrete member needs to be disassembled, the expanding agent is filled into the containers along with the orifices, the expanding agent is chemically reacted in the containers to generate the expansibility, the concrete member is expanded to be broken, and the whole process is free of noise, vibration and slungshots. Compared with the normal pore-forming type static breaking technology, the expansibility is larger, the expanding agent can be effectively avoided to be sprayed out of the orifices, and the construction is safe and environment-friendly; and the drilling working capacity is eliminated, so that the cost can be reduced, and the disassembly construction period can be shortened, therefore, the technology is suitable for the static breaking of engineering temporary facilities.

The invention discloses an endoscope with an enlargeable tail end. The endoscope comprises an insertion part and an endoscope main body, wherein the insertion party comprises a shell, a working tract, a camera and a wire band; the working tract, the camera and the wire band are located in the shell; one end of the wire band is connected with the camera, and the other end of the wire band is connected with the endoscope main body after penetrating the shell; the camera is arranged at the tail end in the shell; a gap is formed at the tail end of the shell so that the working tract or the camera can extend out or retract from the gap; when the working tract or the camera extends out the gap, the working tract and the camera are in a parallel state. The endoscope with the enlargeable tail end can realize the enlarging and retracting of the tail end of the endoscope; the tail end of the endoscope is enlarged after passing through a narrow human body tract so that the working tract or the camera can extend out; the working tract and the camera are located at the parallel positions, so that the inner diameter of the working tract is obviously increased, the working tract can pass through more instruments to take out larger foreign matters.

The tip (1) has a seat section provided next to an upper opening (6) at an inner periphery. The seat section includes a holding region with radial inward projecting part, axially extending ribs and a sealing region that is formed below the holding region. The sealing region is formed, so that the tip is held and sealed on a neck, during insertion of the tip with the seat section on the neck by fitting force. The ribs are plastically deformed, and an elastic deformation occurs on an outer side of the ribs in the seat section.

A notebook computer has a base housing with a heat-generating microprocessor therein, and a lid housing pivotally connected to the base housing. Operating heat from the microprocessor is transferred to the lid housing, for dissipation therefrom, via a specially designed thermosyphoning heat pipe structure formed from first and second heat pipes. The first heat pipe representatively has a rectangular cross-section, an evaporating portion thermally communicated with the microprocessor, and a coiled condensing portion centered about the lid hinge line and having a circularly cross-sectioned interior side surface portion defined by flat sides of the first heat pipe. The second heat pipe has a circular cross-section, an evaporating portion pivotally received within the coiled first heat pipe portion, and a condensing portion thermally communicated with the lid housing. When the lid housing is opened and closed, the evaporating portion of the second heat pipe is rotated within the coiled first heat pipe portion and slidably engages its circularly cross-sectioned interior side portion.

The present invention provides a device for connecting together first and second complementary connector elements, the device comprising first and second parts that are movable in rotation relative to each other, wherein the device comprises a spring having a first end connected to the first part and a second end connected to the second part; the spring, the first part, and the second part being such that turning the first part in a first direction of rotation, or turning the second part in a second direction of rotation opposite to the first direction of rotation increases the inside diameter of the spring; and the spring, the first part, and the second part being such that turning the first part in the second direction of rotation or turning the second part in the first direction of rotation decreases the inside diameter of the spring.

A wheel support bearing assembly includes rolling elements (5) interposed between double row rolling surfaces (3, 4) of outer and inner members (1, 2), which are opposed to each other. Electronic components including a plurality of the sensor units (20), a signal processing IC (25) for processing respective sensor output signals thereof and a signal cable (26) for transmitting the processed output signal to the outside of the bearing assembly are arranged inwardly of an annular protective covering (27) to provide an annular sensor assembly (28). The sensor assembly (28) is fitted to a peripheral surface of a stationary member in a fashion coaxial with the stationary member.

A delivery pipe (1) for the transport of solids is described. The delivery pipe (1) has a double-layer pipe body (2) which has a coupling collar (7, 8) on the inlet-side pipe end (5) and on the outlet-side pipe end (6). A first wear ring (9) and a second wear ring (10) are provided in succession in the longitudinal direction of the pipe body (2) in the region of the inlet-side coupling collar (7). The second inner wear ring (10) has a length (L) which is sized greater than or equal to half the internal diameter (I_D) of the pipe body (2). As a result, wear phenomena can be reduced in the inlet-side region of the delivery pipe (1) and the service life of the delivery pipe (1) can be increased considerably.

A method for selecting a femoral implant based on models of a femoral neck and/or a femoral head of a patient, includes: a) detecting reference points on the femoral neck and/or femoral head of the patient; b) registering the femoral neck and/or femoral head based on three-dimensional reference point spatial positions of the detected reference points; c) producing a femoral neck model and/or femoral head model from the three-dimensional reference point spatial positions; d) ascertaining a base size of a femoral implant model based on the femoral head model; e) producing a femoral implant model based on the base size of the femoral implant model; f) positioning the femoral implant model at a position in or on the femoral head model; g) ascertaining an implant value that indicates how many or what proportion of the ascertained reference point spatial positions are outside the femoral implant model; h) determining if the implant value exceeds a predetermined limit value; and i) if the implant value exceeds the limit value, repositioning the femoral implant model and performing steps g) to i), or if the implant value does not exceed the limit value, determining an appropriate size and position of the femoral implant.