33results about How to "Reliable expansion" patented technology

A method and device for boring a hole in soil or rock material and for forming an anchoring are disclosed. A borehole is formed by inserting a drill bit, and tensioning elements coupled to the drill bit are introduced into the borehole. After completion, the boring rods are detached from the drill bit and removed. The boring rods are provided with a hollow space in its longitudinal direction to introduce a hardenable fluid into the borehole. Anchoring or fixing elements for anchoring on the borehole's inner wall are provided on the drill bit at the end opposite the drilling surface and / or on the tensioning elements. The tensioning elements are subjected to a turning or twisting whereby shortening their effective length for tensioning or centering so that a centering and an optionally temporary tensioning of the tensioning elements can be effected before the hardenable material completely hardens.

A tube expander for heat exchangers is capable of organizing an ideal production line where the transportation efficiency is increased and the productivity is improved by having a transportation path in a straight line, that is, applying a method where the heat exchangers are carried into one end of the tube expander (in the left and right direction) and carried out from the opposite end, that is, the other end (so called through-the-center method). The left and right ends of the end plate 9 at the front side are inserted with a pair of first guide bars 10 , and the left and right ends at the back side are inserted with a pair of second guide bars 11 . A guide path 2a for a carrying device 23 or a guide path 2a to install a transportation device, in either case, the heat exchangers are transported from one end to the other of the base 2 , is established on the base 2 that supports the first guide bars 10 and the second guide bars 11 in a clearance between the first guide bars 10 and the ball screw 20.

An expandable tubing assembly comprises a tubular connector defining overlapping longitudinal slots, the connector comprising end portions and an intermediate portion. The slots extend over the whole length of the connector, but the only slot overlap occurs in the intermediate portion. The assembly further comprises lengths of expandable tubing defining overlapping longitudinal slots and having end portions defining nodes between and beyond the ends of the tubing slots. Tubing threads are formed on the end most tubing nodes. The connector end portions define threads and are coupled with the threads formed on the nodes of the respective end portions of the tubing lengths.

The invention provides an expansion connection device for heat exchange pipes and heat radiating fins, belongs to the technical field of machinery, and solves the technical problems of bad expansion connection effect and the like caused by the fact that the expansion connection device in the prior art implements expansion connection by using air pressure, so that unstable pressure is likely to occur due to bad sealing. The expansion connection device for the heat exchange pipes and the heat radiating fins comprises a worktable and expansion rods, wherein a positioning barrel is arranged on the worktable; one end of the positioning barrel is provided with an opening; a positioning plate is fixedly arranged on the other end of the positioning barrel; the external diameter of each expansion rod is smaller than the internal diameter of each heat exchange pipe; an expansion head is fixedly arranged on one end of each of the expansion rods; the other end of each of the expansion rods is connected with a moving mechanism capable of driving the expansion rod to axially move; the section of each expansion head is in a circular truncated cone shape; a round through hole is formed in the positioning plate; the aperture of the through hole is smaller than the external diameter of each of the heat exchange pipes, but greater than the external diameter of one end, far away from one expansion rod, of the corresponding expansion head. The expansion connection device has the advantages of rapidly implementing expansion connection on the heat exchange pipes and the heat radiating fins, and being stable in expansion connection quality.

The invention discloses a skin tissue expander, comprising an absorption pan body and a second permanent magnet, wherein the absorption pan body is internally provided with an axially moving tension part; the tension part is connected with the absorption pan body or a movable par installed on the absorption pan body in a screwing way; the tension part is provided with a first permanent magnet; the second permanent magnet is externally packed with a layer of human body compatible material or inert material. Compared with the existing skin tissue expander, the permanent magnet embedded under the skin tissue and the permanent magnet embedded on the absorption pan body generate magnetic field magnetism due to inverse magnetic poles, so that the second permanent magnet embedded under the skin tissue drives the skin tissue to be outwards expended, to lead the skin tissue to be outwards swelled to form an expanding effect, and prevent the existing expander from inwards expensing to stress adjoining tissues, blood vessels and nerves or organs, and not to sink base tissues.

Provided is a stent 51C made of a cylindrical braid formed from a plurality of filament yarns containing a biodegradable polymer, wherein connecting points 53a-53d are formed at the ends of the filament yarns constituting the braid so as to be aligned in two or more rows in the longitudinal direction of the braid. Elastic yarns 54a-54d are disposed outside at least a part of the stent 51C and at least a longitudinal part, of the elastic yarns, that includes the vicinity of the ends thereof. One end of each of the elastic yarns is fixed in the vicinity of a stent end, while the other end is fixed at any position in the stent. When the diameter of the stent is contracted, tension may be applied to the elastic yarns. Accordingly, provided are: a stent that is easy to mount to a delivery system and enables an easy expansion operation; and a medical device including this stent.