125results about How to "Reduce lateral displacement" patented technology

Devices and methods are provided for reducing the lateral displacement of an endovascular device, e.g. a stent graft, within an aneurysm sac. A stabilization system comprising one or more stabilizing elements is inserted within the aneurysm space between an implanted device and the vessel wall. Filling this space prevents changes in curvature of the implanted endovascular device, and prevents longitudinal displacement, thereby providing for improved long-term stability and durability of endovascular repair.

The invention belongs to the technical field of seabed pipeline laying and particularly relates to a method for fixing a seabed pipeline and preventing buckle propagation. The method comprises: manufacturing a plurality of pairs of reversed U-shaped shells of which the inside diameters are the same and the outer edges are tangent according to the outside diameter and wall thickness specification of the seabed pipeline, wherein the upper parts of the shells are in semi-annular shapes and the lower parts of the shells have semi-cylindrical hollow cuboid bases; connecting the surfaces of the bases with barrel structures to form buckle preventing fixers; and mounting the fixers on the seabed pipeline at intervals along a radial direction. The method adopts a reasonable mounting process, and can simplify operation, reduce cost, effectively fix the seabed pipeline and prevent buckle propagation, and ensure the safe and stable operation of the seabed pipeline.

An aspect of the present invention is drawn to a device for use with an electrostatic chuck having a top surface and a bottom surface, the top surface being separated from the bottom surface by a width, the electrostatic chuck additionally having a hole therein, the hole having a first width at the top surface and having a second width at the bottom surface, the first width being less than the second width, the top surface being capable of having wafer disposed thereon. The device includes a pin, a shaft, a neck portion and an outer housing portion. The pin has a pin width less than the first width. The shaft has a pin-holding portion, an end portion and a central portion disposed between the pin-holding portion and the end portion. The central portion has a first bearing portion. The outer housing portion has a first end and a second end and includes a second bearing portion. The shaft is disposed within the outer housing portion and is moveable relative to the outer housing portion. The neck portion is disposed at the first end. The second bearing portion is stationary relative to the neck portion. The first bearing portion is movable relative to the second bearing portion.

An insulating concrete form foam block bi-directional system comprises a pair of opposed and parallel foam sidewall panels spaced using a plurality of plastic and metal band ties that act as a fire-break between the two exterior finished concrete wall surfaces. Each tie comprises nearly full sidewall height, plastic flanges which engage the sidewalls and a metal band cross-connecting vertical holders of the ties. The metal band forms a wide opening to enhance concrete flow. The tie results in a minimal downward stress impact on the tie during concrete placement. The top and bottom surfaces of each sidewall are formed with raised areas and non-raised areas which interlock with adjacent blocks. The side surfaces of each sidewall are formed with vertical tongues and grooves which interlock with like tongues and grooves of corner pieces which are adapted to form right or left-hand comers.

The invention relates to an air-inflated membrane structure with a crossing cable net arranged along a geodesic line. The air-inflated membrane structure comprises an air-inflated membrane and bracing cables, wherein after the air-inflated membrane is shaped through inflating, the middle part of the air-inflated membrane is of a cylindrical body, the two ends of the air-inflated membrane are of smooth-transition arc-shaped peripheral membrane faces, and the bracing cables are arranged on the peripheral membrane faces along the direction of the geodesic line in a manner that anchor points at the two ends of each bracing cable are taken as starting points. Compared with the prior art, the air-inflated membrane structure has the advantages that the concept that the geodesic line is the shortest in a spatial curved face is utilized, the crossing cable net is arranged at the periphery of the air-inflated membrane along the direction of the geodesic line, and the bracing cables are restricted to lateral movement and cannot be subjected to the problem of swinging under normal use; and as the bracing cables are restricted to the lateral movement, the number of nodes, connected with the bracing cables, in the whole peripheral crossing cable net can be accordingly reduced, the stress on the nodes is smaller, the difficulty of construction is reduced, and then, the economical efficiency and safety of the structure are increased.

The invention discloses a seedling taker. The seedling taker comprises a connecting rod mechanism, a clamping mechanism and two groups of transferring and storage drums. The seedling taker disclosed by the invention has the beneficial effects that the connecting rod mechanism leads the clamping mechanism to be in two states, and adjacent potted seedlings are taken out under the two states, so thatsimultaneous operation of the adjacent clamping plates is avoided, the interference of equipment is reduced and the taking of the potted seedlings out of seedling discs with small spacing can be realized; due to an ejecting mechanism, partial structures of the potted seedlings are exposed outside, so that the operation of clamping parts is convenient, the horizontal displacement of the clamping parts can be reduced and the space occupation can be further reduced. The invention also discloses a plant transplanting machine with the seedling taker.

The invention discloses a strong-water-permeability stratum building foundation pit horizontal grouting sealing bottom construction method. The strong-water-permeability stratum building foundation pit horizontal grouting sealing bottom construction method includes the following steps that horizontal grouting sealing bottom construction is conducted, wherein precise positioning and horizontal grouting hole drilling are conducted through a horizontal directional drilling machine, and after hole drilling is completed, retreating type grouting is conducted when drill stems are dragged back, and ahorizontal sealing bottom is formed at the bottom of a foundation pit; and vertical curtain construction is conducted, wherein after sealing bottom horizontal grouting is completed, closed vertical curtains are formed on the four sides or the three sides of the foundation pit, complete lap joint connection is conducted on the vertical curtains and the horizontal sealing bottom, and in other words, a strong-water-permeability stratum foundation pit water insulation structure is formed. According to the strong-water-permeability stratum building foundation pit horizontal grouting sealing bottomconstruction method, vertical curtain construction is conducted after horizontal sealing bottom construction is conducted; firstly, the horizontal sealing bottom can be rapidly formed for the foundation pit to control underground water; then, the vertical curtains and the horizontal sealing bottom structure are connected together, and therefore a three-dimensional anti-seepage structure can be formed for the foundation pit project, and the effects of supporting, water insulation and foundation pit project reinforcing are achieved; and while the surrounding environment is well protected, the project cost is saved, and the project risk is lowered.

The invention discloses a nonlinear air spring. The nonlinear air spring comprises an upper cover plate, a support plate, air bags, an annular rubber pile and an abrasion plate; the support plate is coaxially arranged below the upper cover plate, upper and lower sub-openings are arranged at the air bags on the upper cover plate and the support plate, the annular rubber pile is coaxially bonded atthe bottom of the support plate, and the abrasion plate is fixed to the top surface of the support plate; the center position of the support plate is provided with a limiting projection that projectsdownwardly into an inner cavity of the annular rubber pile, the center position of a bottom plate of the annular rubber pile is provided with a limiting stop which protrudes upwards, the top surface of the limiting stop is a groove shape to form a limiting groove, the limiting protrusion extends into the limiting groove along the central axis and is not in contact with the limiting groove, the nonlinear air spring is characterized in that the limiting protrusion is sleeved with an elastic stop, and the elastic stop extends into the limiting groove and is not in contact with the limiting groove. The three-stage transverse nonlinear rigidity is realized, various line conditions are better adapted, and the safety requirement of a vehicle is guaranteed. The invention further provides a transverse rigidity design method of the nonlinear air spring.

The invention belongs to the technical field of laying submarine pipeline facilities, and relates to a submarine pipeline bending-resisting fixer which is used for fixing and protecting a submarine pipeline. The submarine pipeline bending-resisting fixer comprises a semicircular upper shell, a lower base and a barrel-shaped top plate, wherein the lower base is a semi-cylindrical hollow cuboid, inner diameters of the upper shell and the lower base are same, outer edges of the upper shell and the lower base are tangent and provided with extending eye plates, the eye plates are used for connecting the upper shell and the lower base through a bolt and nut pair, and the lower base is connected with the barrel-shaped top plate through a bolt. The invention has the advantages of simple manufacture process, convenient installation and operation and low cost, and can be used for effectively fixing the submarine pipeline and preventing bending from spreading so as to ensure the stability and the integrity of the submarine pipeline and reduce the economic loss caused by structure damage by the bending of the submarine pipeline.

A divider barrier 1 for roadway delineation includes detachably juxtaposed divider members 2, 3, 4. The divider members have each a housing-like base body 5 which can be placed on the ground and has slanted roof-shaped lateral collision plates 6, 7. Connected to the lower longitudinal edges 10 of the collision plates 6, 7 are support plates 11, 12 which extend from the base body 5 outwards. A guide bar 15 is provided above the base body 5 at a vertical distance thereto. Connecting means 18–21 are provided to detachably couple successive divider members 2, 3, 4 with one another. The support plates 11, 12 of two successive divider members 2, 3, 4 are detachably connected to one another by means of fishplates 35 on the underside, wherein each fishplate 35 is hereby fixed with its first end portion 36 under the support plate 11 of the one divider member 2, 3, 4 and with its second end portion 37 under the support plate 12 of the following second divider member 2, 3, 4. Each of the first end portion 11 as well as the second end portion 12 of each fishplate 35 has a receiving opening 40 for engagement of a pin 41 constructed of round configuration and secured under each of the support plates 11, 12. As a consequence of these pins 41, the divider barrier 1 is stiffened against lateral displacement.

The invention provides an active constrained type cast-in-situ frame beam-column joint system based on a retard-bonded prestress technology and belongs to the field of civil and structural engineering. The system comprises cast-in-situ frame beam-column joints, retard-bonded prestress bars and wedge-shaped anchorage devices. The cast-in-situ frame beam-column joints are each of a cross structure and comprise left-side cast-in-situ concrete beams, right-side cast-in-situ concrete beams, upper-side cast-in-situ concrete columns, lower-side cast-in-situ concrete columns and joint core areas. Thewedge-shaped anchorage devices are arranged on the connecting portions of the ends of the columns and the beams, and the right-angle sides of the wedge-shaped anchorage devices are matched with the surfaces of the beams and the columns. The retard-bonded prestress bars are in arc shapes and buried in cast-in-situ structures, and the two ends of the retard-bonded prestress bars are connected with the wedge-shaped anchorage devices of the corners of the adjacent beam-column joints. After the retard-bonded prestress bars around the cast-in-situ frame beam-column joints are tensioned, through thewedge-shaped anchorage devices, X-shaped active constraint is provided for the cast-in-situ frame beam-column joints. According to the active constrained type cast-in-situ frame beam-column joint system based on the retard-bonded prestress technology, the seismic performance of the joints is improved, lateral displacement of frame structures is reduced, and the system is more convenient to construct.

The invention discloses a cement soil enclosure wall-cast-in-place pile cantilever type combined support. The cement soil enclosure wall-cast-in-place pile cantilever type combined support comprises acement soil stirring pile enclosure wall, and is characterized in that cast-in-place bored piles are driven on the outer side of the cement soil stirring pile enclosure wall to form a combined support; a concrete pressure top plate is arranged at the top of the combined support for improving the integrity of an enclosure structure; and the bottom of a foundation pit on the inner side of the cement soil stirring pile enclosure wall is reinforced, so that the stability of the enclosure structure is improved, and the top and bottom projection deformation is controlled. The combined support can be used for the conditions of limited construction conditions of the enclosure structure or buildings needing to be protected out of the pit, can effectively improve the rigidity of the enclosure structure under the condition of not increasing the width of the enclosure structure, reduces lateral displacement of the enclosure structure and the pit external ground surface settlement, reduces the influence on surrounding environments by foundation pit excavation, reduces the construction period, and achieves excellent applicability and social benefit.