92results about How to "Delayed buckling" patented technology

A method of temporarily reducing the diameter of a stent graft (10) and a stent graft with its diameter reduced. The stent graft has a tubular body and self expanding stents. The method comprising extending a release wire (18, 20) part helically along the graft material tube from substantially one side of the graft material tube at one end (14) of the graft material tube to substantially the opposite side of the graft material tube at the other end (12) of the graft material tube along the stent graft and stitching the release wire into the graft material tube, at each of a number of positions along the release wire looping flexible threads (22, 24) around the release wire and extending the flexible threads laterally around the circumference of the stent graft in each direction to a position away from the release wire, engaging the first flexible threads into the graft material or around struts of the stent, and drawing the ends of the thread together and tying ends of the thread to thereby temporarily reduce the overall diameter of the stent graft.

A load carrying device configured to support and transport a tray comprising a platform configured to support the tray, rolling means depending from the platform, and a retainer disposed on the platform and configured to loosely abut the tray to limit movement of the tray across the platform when the tray is supported on the platform. The retainer limits movement of the tray in all directions across the platform when the tray is supported on the platform. The retainer projects upwardly from the platform and presents a surface opposing horizontal movement of the tray when the tray is supported on the platform. The tray includes a bottom surface, a first pair of opposed walls projecting upwardly from the bottom surface, a second pair of opposed walls projecting upwardly from the bottom surface and integrally joined with the first pair of opposed walls, and a plurality of support members projecting below the bottom surface and configured to be supported by the platform, wherein the bottom surface is configured to clear the retainer when the support members are supported on the platform, and wherein the support members oppose and loosely abut the retainer when the support members are supported on the platform.

A buckling restrained brace includes an axial member and a restraining unit. The axial member extends along an axial direction, and has two coupling sections for connecting respectively to two connecting plates of a framework of a building, and a middle section connected between the coupling sections. Each coupling section has a supplying plate portion coplanar with an elongated plate body of the middle section, and a contacting plate portion extending perpendicularly from the supporting plate portion. An outer end of the supplying plate portion of each coupling section has a groove formed therethrough along a transverse direction of the axial member, extending along the axial direction, and permitting a respective one of the connecting plates to engage fittingly therewith and contact the corresponding contacting plate portion.

A thick-wall small-diameter high-pressure fuel injection pipe has a spherical seat surface, an annular flange, and a conical surface continued from the seat surface at a connecting end of the pipe. If the pipe is configured so that t (thickness)/D (outer diameter)<0.3, then an axial distance from the connecting head end to the back face of the annular flange is 0.38D to 0.6D, a spherical radius of the seat surface is 0.45D to 0.65D, the annular flange outer diameter is 1.2D to 1.4D, and an inner peripheral surface of the head has a substantially flat cylindrical surface or a conical surface. If the pipe is configured so that t (thickness)/D (outer diameter)≧0.3, then the axial distance from the connecting head end to the back face of the annular flange is 0.38D to 0.7D.

An end effector that can have an upper jaw and a lower jaw. A wrist can connect the end effector to an elongated shaft. A beam member can be arranged to translate within the upper and lower jaw. An actuation assembly can have a pushing assembly configured to transfer compressive force to the beam member and a pulling assembly configured to transfer tensile force to the beam member.

A surgical device includes an elongated shaft, an end effector, and a wrist assembly. The wrist assembly includes a first outer link, a first inner link, and a second outer link. The first outer link is connected to the shaft and includes first gear teeth. The first inner link is pivotally coupled with the first outer link. The second outer link is pivotally coupled with the first inner link. The second outer link includes second gear teeth that interface with the first gear teeth and control orientation of the first inner link relative to the first outer link and the first outer link throughout a range of orientations of the wrist assembly.

A system for inhibiting unwanted movement between a building and an underlying foundation, the system including at least one shear panel assembly including corrugated portions and configured to resist bending and twisting distortion and at least one hold-down assembly configured to attach to the at least one shear panel assembly and to attach to at least one anchor member rigidly engaged with an underlying building foundation so as to resist uplift, downward movement, and lateral movement of the at least one attached shear panel assembly, the at least one hold-down assembly configured to provide a range of vertical attachment adjustment to accommodate a range of extended length of the at least one anchor member.

A locking device is provided for locking a container having sidewalls and at least one lid defining an open position and a closed position. The locking device may include an elongate lock member configured to engage the lid(s) and a lock housing that is associated with at least one of the sidewalls. The lock housing may be configured to at least partially receive the elongate lock member. The locking device may be designed to be installed on the container in the field, or the locking device may be integrally formed with the container. The lock housing may include a security element that is detectable by a security system to guard against theft of the container. In some cases, a security module is provided that releasably attaches to the lock housing to provide further alarm functionality.

The invention aims at providing a fiber reinforce plastic (FRP) reinforced concrete-filled steel tube combination column which comprises a steel tube, a hoop rib, an FRP reinforced rib and a longitudinal reinforcement, wherein the hoop rib and the FRP reinforced rib are arranged in the steel tube; the inner wall of the steel tube is provided with fixed angle iron; the end part of the FRP reinforced rib is fixed on the angle iron; the FRP reinforced rib is provided with a hole, and the hoop rib passes through the hole in the FRP reinforced rib; the longitudinal reinforcement is fixed on the hoop rib; the steel tube is filled with concrete. An FRP reinforced rib plate internally provided with the hoop rib and the longitudinal reinforcement is arranged in the FRP reinforced concrete-filled steel tube combination column, and the concrete can be separated again, so that the restraint effect of the concrete is improved, the bearing capacity of the concrete is improved, and the tube wall on the stressed side is effectively prevented from being bended. By adopting a structure of enabling reinforced concrete, the FRP reinforced rib and the steel tube to cooperative work, the FRP reinforced concrete-filled steel tube combination column is simple in structure and convenient to construct, and has the characteristics of being light in weight, high in carrying capacity and good in ductility and shock resistance.

The invention discloses a punched rib and pull rod constraint double-layer steel plate concrete shear wall. The punched rib and pull rod constraint double-layer steel plate concrete shear wall comprises two opposite wall body steel plates, connection steel plates at the two ends of a wall body, filling concrete defined by the steel plates on the four sides, punched stiffening ribs and pulling rods penetrating through the punched stiffening ribs. The punched stiffening ribs are arranged on the inner side faces of the steel plates and connected through the pulling rods penetrating through holes. The pulling rods comprise the pulling rods in the wall length direction and the pulling rods in the wall thickness direction. The pulling rods in the wall length direction penetrate through the stiffening ribs arranged in the wall length direction and the connection steel plates at the two ends. The pulling rods at the two ends of the wall body in the wall thickness direction penetrate through the stiffening ribs in the wall thickness direction and the two opposite wall body steel plates. The pulling rods at other portions in the wall thickness direction are arranged between every two adjacent stiffening ribs arranged in the wall length direction every other 2-5 stiffening ribs, and are staggered with the pulling rods in the wall thickness direction along the wall height part at proper intervals. The bearing capacity and ductility of the shear wall can be improved.

A stent includes a coiled-up sheet having overlapping inner and outer longitudinal sections extending parallel to a longitudinal axis thereof, and defining a periphery, the coiled-up sheet being unrollable between contracted and enlarged conditions. A plurality of stretchable elements are formed in the coiled-up sheet, the stretchable elements being expandable about the periphery between an unstretched condition to facilitate placement in a delivery device in the contracted condition and a stretched condition to facilitate expansion of the coiled-up sheet to the enlarged condition upon deployment from the delivery device. Preferably, the coiled-up sheet is biased to the enlarged condition, and the stretchable elements are biased to the stretched condition. More preferably, at least one of the biases is provided by a shape memory property of the coiled-up sheet, which is activated by exposing the stent to body temperature.

The invention provides a creep compression experimental apparatus. The creep compression experimental apparatus comprises an installation frame connected between an upper stretching rod and a lower stretching rod of a creep test machine, wherein the installation frame comprises an upper pressure block and a lower pressure block, the upper pressure block is provided with a threaded hole A, the lower pressure is provided with a conical hole coaxial with the threaded hole A, one end of a test sample is fixed in the threaded hole A, the other end is located in the conical hole by virtue of a conical head of a conical positioning device, and when the conical head is matched with the conical hole, the threaded hole A, the conical head, the conical hole and the test sample are coaxial. The auto-positioning function is realized by virtue of a conical surface contact of the conical positioning device, so that the test sample can be well centralized in the single-axis compression process, and the instability bending possibility of the test sample can be reduced. By virtue of the reversely-arranged extension rod, the rebound displacement of a precompressed sensor measuring head in the reset process is taken as the compression creep deformation of a sample, so that the occurrence of overstroke of the sensor measuring head and damage to the displacement sensor can be effectively avoided.

A machined spring for injector applications includes opposed first and second spring bases separated apart along a longitudinal axis. A spring body connects the first and second spring bases. The spring body includes a generally annular wall with a plurality of spring channels defined therethrough, such as machined channels. Exemplary applications for such machined springs include liquid strainers, valve components, and structural components for accommodating thermal expansion in injectors.

The invention relates to the field of buildings, in particular to an outer corner structure of a composite wall. The outer corner structure of the composite wall comprises a shear wall and a connecting square tube. The shear wall comprises H-shaped steel, a middle horizontal plate and middle vertical plates. The middle vertical plates are vertically welded to the upper side surface and the lower side surface of the middle horizontal plate. The H-shaped steel is welded to the left side and the right side of the middle horizontal plate, and the edge sides of the H-shaped steel are perpendicular to the middle horizontal plates, that is to say, the middle vertical plates are parallel to the edge sides of the H-shaped steel. The shear wall is fixed on the two adjacent side surfaces of the connecting square tube to form the outer corner structure through split screw rods. The vertically adjacent split screw rods are arranged in a crossing mode. According to the outer corner structure of the composite wall, after adopting the above scheme, the outer corner structure of the composite wall has the characteristics of being flexible in layout and high in construction speed, and the whole strength of outer corners of the composite wall is ensured.

The invention relates to a concrete-filled steel tube beam column connecting joint capable of being replaced after an earthquake. The concrete-filled steel tube beam column connecting joint comprises a prefabricated joint frame with threaded holes formed in the upper side, the lower side and the peripheral end face, the upper side and the lower side of the prefabricated joint frame are connected with an upper steel tube concrete column and a lower steel tube concrete column through bolts, the periphery of the prefabricated joint frame is connected with steel beams through bolts, the vertical section of the steel beams is I-shaped, arc-shaped stress grooves are formed in the front side and the rear side of a steel beam flange plate, the end, away from the prefabricated joint frame, of the steel beam is connected with a steel tube concrete beam through bolts, the surface of the steel beam is slidably connected with a first arch-shaped connecting piece and a second arch-shaped connecting piece which are spliced with each other, the first arch-shaped connecting piece, the second arch-shaped connecting piece and the steel beam are fixedly connected through fasteners, the dog-bone type steel beam can be prevented from buckling through the arch-shaped connecting pieces, the strength of the steel beam is enhanced to a certain degree, the energy dissipation capacity is enhanced, the ductility is improved, meanwhile, the steel beam is protected to a certain degree, and the service life of the steel beam is prolonged to a certain degree.