48 results about "Joint formation" patented technology

The stent matrix of a stent incorporates joints that permit stress-free relative movement of first and second structural portions (10, 12) of the matrix as the facing surfaces of the joint between the structural portions slide relative to one another. The joints are formed in the thickness of an annular wall of the stent, and are created by a computer-controlled laser beam cutting procedure.

An integral multilayer joint seal system. Layers of foam, layered co-planar to the adjacent surface, are interspersed with a barrier layer. The foam layers may be uncompressed or partially compressed at the time of joint formation and may be composed of open or closed, or hybrid, cell foam. The foam may be impregnated with a fire retardant or may be composed of a fire retardant material, if desired. The barrier may have a tensile strength greater than the adjacent foam and may be different in dimensions from the layers of foam. The joint may have an elastomer, such as silicone, at its top and/or bottom, and may even include an elastomer layer within or about the barrier.

An integral multilayer joint seal. Layers of foam, layered co-planar to the adjacent surface, are interspersed with a barrier layer which extends beyond the foam layers to provide a protective surface, a surface for attachment atop adjacent substrates, or a connecting tab for use with adjacent joint seals. The foam layers may be uncompressed or partially compressed at the time of joint formation and may be composed of open or closed, or hybrid, cell foam. The foam may be impregnated with a fire retardant or lay be composed of a fire retardant material, if desired. The barrier may have a tensile strength greater than the adjacent foam. The joint seal may have an elastomer, such as silicone, at its top and/or bottom, and may even include an elastomer layer within or about the barrier.

An elongate engagement tool that has engagement elements located on a distal end of a first rod, a handle on the proximate end of second rod, a controller on the handle to control the engagement elements, and a linkage between the controller and engagement elements to control the engagement elements is disclosed. The rods are connected together by a locking hinge. A locking pin is received by the knuckles of the hinges has a plurality of axial segments. The profiles of the axial segments alternate from round disks to aster shaped disks that closely fit into the apertures formed by the knuckles. When the locking pin is moved to a first locked position where the aster shaped profiled sections are aligned with the apertures in the corresponding knuckles to the hinge is locked. Movement of the pin to a second free position where the round axial sections are aligned with the apertures in the knuckles provides for limited rotational movement.

According to one aspect of the invention there is provided a prefabricated rail sleeper [10] suitable for use in erecting a track structure [30]. The rail sleeper [10] comprises an elongate body portion [12] for supporting rails [14], the body portion [12] including a top surface [12,1], a bottom face [12.1] and at least two side faces [12.3], and terminating at least at one end thereof in a transition joint formation [16] dimensioned matingly to engage a complimentarily dimensioned transition joint formation [16] of an adjacent rail sleeper [10] in use so as to form a substantially continuous track structure. The sleeper [10] also includes a series of block formations [20], each of which is at least partially outwardly flared and extending beyond the side faces [12.3] of the body portion [12] so as to increase shear interlock of the sleeper [10] with the track bed to reduce longitudinal creep; as well as a series of transverse drainage ducts [26] extending underneath the rail sleeper [10] for allowing rainwater drainage between different side faces [12.3] of the body portion [12] and away from the rail sleeper. The invention extends to a ballast-free track structure [30] comprising at least two rail sleepers [10] according to the invention wherein the sleepers are located in spaced parallel orientation on a ballast-free track bed so as to define a centre drain [32] between the sleepers; and including a mesh [34] located between the sleepers [10] for reinforcing the centre drain [32].

A method for aligning a first substrate relative to a second substrate by enabling reflow of low-melting-temperature solder bumps is disclosed. Reflow of the solder bumps induces a force that moves one substrate relative to the other to improve alignment accuracy between bond pads located on each substrate. The method further enables reduction of surface oxide on the solder bumps that would otherwise inhibit reliable solder joint formation.

The present invention relates to a reflow film containing a thermoplastic resin which is dissolvable in a solvent, and solder particles, wherein the solder particles are dispersed in the film, and also relates to a solder bump formation method which comprises: (A) a step of mounting the reflow film on the electrode surface side of a substrate, (B) a step of mounting and fixing a flat plate, (C) a step of heating, and (D) a step of dissolving and removing the reflow film, and herewith, a reflow film is provided which, by causing localization of the solder component on the electrodes of the substrate by self-assembly, exhibits excellent storage properties, transportability and handling properties during use, and can form solder bumps or solder joints selectively on only the electrodes.

A system is disclosed for detecting or confirming gestures performed by a user by identifying a vector formed by non-adjacent joints and identifying the angle the vector forms with a reference point. Thus, the system skips one or more intermediate joints between an end joint and a proximal joint closer to the body core of a user. Skipping one or more intermediate joints results in a more reliable indication of the position or movement performed by the user, and consequently a more reliable indication of a given gesture.

A vacuum brazing method is disclosed for joining aluminum stock materials to each other. The typical cladding material utilized includes aluminum and a melting point lowering agent such as silicon. In addition, the cladding material typically includes magnesium to provide for enhanced wetting of the cladding material into the joint area. It has been found that adjusting the ratio of magnesium to calcium to a level of equal to or greater than 625 to 1 provides greatly enhanced brazed joint formation and reliability of the vacuum brazing method.

A Micro SMDxt package is provided that configured for mounting to a circuit board. The SMDxt package includes a silicon-based IC having an array of contact pads on one side of thereof, and a die electrically attached to the silicon-based IC. A plurality of solder balls is included, each of which has a polymeric core surrounded by a metallic shell that in turn is surrounded by a layer of solder material. Further, each solder ball is positioned in contact with a corresponding contact pad of the package. An intertwined intermetallic fusion layer is formed through the fusion between material components of the contact pads and the solder material, via heat treatment. The intermetallic fusion extends between and from an outer surface of the metallic shell of each solder to an outer surface of a corresponding contact pad to form a high strength intermetallic solder joint therebetween.

The invention provides a welding method of an ocean platform module wall board gas shielded flux-cored down weld, comprising the following steps of: preparing a welding joint groove and cleaning; assembling interfaces at the joint of two wall boards; preheating a welded position before welding; and carrying out preparing working procedures such as setting a welding method and welding parameters, setting welding materials and setting shielding gas and parameters, welding working procedure and treatment working procedure after welding, wherein the welding materials in the preparing working procedure before welding are set to be flux-cored welding wire, and the shielding gas is set to be CO2. The welding method has the improvement in that the welding joint groove in the preparing working procedure before welding is I-shaped, and the welding way is set to be vertical down weld. The invention can improve the welding speed, achieves attractive welded joint formation, greatly lowers the welding distortion, reduces the workload for wall welding deformation correction after welding and welded joint polishing, and efficiently improves the working efficiency.

The invention relates to a joint type crawling robot for detecting a heat pipe of a steam generator, in particular to a joint type crawling robot. After a toe of a conventional robot PEGASYS is fixed, the detected heat pipe is a single heat exchange pipe; when the robot is used for detecting different heat pipes, the position of the toe is changed for at least two times; after being fixed, the conventional robot PEGASYS is small in detecting area and inconvenient to operate; when a conventional robot ZR-100 performs safety detection on the heat pipe, the problem that the robot is large in overall dimension and easy to limit by the type of a pipe plate exists. According to the joint type crawling robot disclosed by the invention, the structures of a left rotating joint, a middle rotating joint and a right rotating joint are the same, and the three rotating joints form a three-freedom-degree mechanical arm; a toe module comprises a left toe assembly and a right toe assembly, wherein the left toe assembly is arranged in the left rotating joint; the right toe assembly is arranged in the right rotating joint, an interface of a detecting tool is formed in the outer wall of the left rotating joint or the outer wall of the right rotating joint. The joint type crawling robot disclosed by the invention is used for heat pipe detection.

The invention discloses a rotary fully-flexible mechanical arm. A flexible joint and a flexible mechanical arm are connected. The lateral curved face of the flexible joint is sealed and connected between the upper bottom face and the lower bottom face in a wrapped mode, so that the whole flexible joint forms an airtight air chamber, an external air source injects air into the air chamber or exhausts air in the air chamber, and the height of the flexible joint is changed while the flexible joint rotates. The outer side of a mechanical arm body is of a rack-shaped structure arranged in the extension direction of the flexible joint. A small hollow air chamber is formed inside each tooth of the rack-shaped structure. The small air chambers at the teeth communicate with one another through communication cavities inside the middle of the mechanical arm body in a penetrating mode so that the integral mechanical arm airtight air chamber can be formed. One end of a mechanical arm silicone tubeis connected with the mechanical arm airtight air chamber, and the other end of the mechanical arm silicone tube is connected to the external air source. A node silicone tube is connected with negative pressure. The flexible joint drives the flexible mechanical arm to rotate, and the flexible mechanical arm is bent in different directions. According to the rotary fully-flexible mechanical arm, themechanical arm bending direction can be changed and adjusted, the flexibility of the flexible mechanical arm is greatly improved, and the application prospects are broad.

The invention discloses a segmental precast and sinking method for underwater construction. The method comprises steps as follows: a step of segmental precast: precast of reinforcing steel bars, rolled steel and/or concrete is performed in a precast site, and precast segments (1) of the reinforcing steel bars, the rolled steel and/or the concrete are obtained; a step of pipe joint formation: two or more precast segments (1) are subjected to assembling butt joint and tensioning treatment on a semi-submerged ship (2), and single pipe joints are obtained; and a step of pipe joint sinking and buttjoint: the semi-submerged ship (2) is transported to the sinking position of water surface in a floating manner and then dives, multiple single pipe joints are sunken and subjected to underwater buttjoint, and an underwater structural system is formed. According to the scheme, the problem of large construction difficulty of underwater pipe sinking can be solved, and the effect of reducing the construction difficulty of underwater pipe sinking is realized.

The invention relates to a soldering flux for aluminum and steel dissimilar metal alternating-current arc melt brazing and a manufacturing method thereof. The method comprises the steps of first enabling KAlF4 powder and aluminum powder to be mixed at a mass ratio of (4-7):(3-6), then enabling the mixture to be mixed with acetone into uniform suspension solution, enabling potassium sodium tartrate which is 0.5%-1% the total mass of the KAlF4 powder and the aluminum powder to be added into distilled water to be dissolved, finally adding the suspension solution into the distilled water to mix evenly, and obtaining the soldering flux. The soldering flux has effects of stabilizing alternating-current arc, promoting wetting spreading, improving welded joint formation and improving joint performance, and high-quality reliable connection of aluminum and steel dissimilar metals is achieved finally.

Articulated dismountable modular scaffolding of the type assembled at the workplace by means of parts comprising a structure that can be assembled and disassembled, characterised by the fact it is made up by the following interconnected parts:

• • Vertical Tubes (1),
  • Joints (N). The joints (N) are the points where vertical [bars] converge with horizontal or diagonal ones, being formed by two symmetrical, semi-circular semi-joints.
  • Horizontal Tubes (6),

The horizontal fastening (H) has a catch (9) in its lower part, as a latch (9)

• • Diagonal Tubes (21),
  • Diagonal Fastenings (D), located at each end of the diagonal tube (21),

A panel and a system for use in building a lightweight structure are provided. The panel, made of a film or a sheet capable of being curved or bent with fingers, includes a body in a geometric shape circumscribed by straight or curved edges, and at least one joint formation along the edge for panel connection. The joint formation has tabs separated by at least one gap. Each tab expands bilaterally and proximally from the body at its base, and each gap is positioned along the edge so as to accept the base of the tab. The joint formations along the edges of varied curvatures are alignedly, hingedly, and detachably interlocked with each other by twisting the panels with fingers to individually hook the tab at the gap. The panels are assembled into geometric structures having flat or curved faces.

The invention discloses a technology suitable for automatically welding high-strength pressure steel pipes in a water tunnel. The technology includes the following steps that a, one-sided inward grooves are both milled on the ring surfaces to be welded of the two steel pipes; b, the two steel pipes are aligned; c, preheating is conducted on the two sides of a welded joint; d, rails are installed on the inner walls of the steel pipes and further located on the two sides of the welded joint; e, a welding tractor is installed on the rails; f, welding technological parameters and moving trajectories of the welding tractor are confirmed; g, back welding is conducted; h, back welding fusion lines are trimmed; and i, filling and cosmetic welding are carried out. The technology has the beneficialeffects that welded joint formation is attractive, quality is good, molding and low temperature impact toughness are good, and the technology is particularly suitable for high-strength water and electricity steel welding. Meanwhile, the automation process of the welding technology of the pressure steel pipes in the tunnel is greatly accelerated through the technology, the labor intensity of welders is relieved, construction efficiency is high, and the independence on skill levels of the welders is lowered and the social benefits and economic benefits are good.

Joint formations that, in joining together joining members employed in a variety of electrical and electronic components, yield sufficiently high joint strength in the direction perpendicular to the plane in which two joining members join, and meanwhile in the direction parallel to the joint plane. First and second joining members have respective joint phases each formed with a different number of distinct yet continuous conformational faces, defining the joint phases so that neither is the matching complement of the other. A bonding agent interposed between the joint phases joins the joining members together. The difference in thermal expansion coefficient between the two joining members, and between them and the bonding agent, is 5.0×10⁻⁶/° C. or less. The joining members are a metal such as tungsten or Cu—W, or a ceramic such as AlN or Si₃N₄; and glass or a solder material is utilized for the bonding agent.