36 results about "Hyper elastic" patented technology

A balloon expandable covered stent consists of a plurality of primary stent units, each having an undulating shape defined by a series of primary strut members converging to form peaks and valleys. The primary stent units are assembled into a single cylindrical structure of the stent by connecting corresponding peaks with secondary strut members. Generally, surfaces of the stent may then coated with a polymeric, hyper-elastic material, preferably Thoralon®, by pre-expanding the stent prior to coating.

A self-wrapping dilatation balloon comprising a multiblock copolymer having high elasticity and elastic recovery from nominal strains greater than about 30% is described. Also described herein, is a polymeric extrudate for making a dilatation balloon comprising a multiblock copolymer having tensile strength in the range of about 50 MPa to about 450 MPa, strain at break in the range of about 50% to about 600% and substantially complete elastic recovery from nominal strains of at least about 30%. The extrudate has phase-separated microdomains that are macroscopically aligned in parallel, perpendicular, transverse or a combination thereof. Also described herein is a process for producing a polymeric extrudate for use as a dilatation balloon. The process comprises extruding a multiblock copolymer mixture or composition to form an extrudate. The extruding is done such that the extrudate has phase-separated microdomains that are macroscopically aligned in parallel, perpendicular, transverse or a combination thereof. After extrusion, the process optionally comprises the steps of drawing and coagulating the extrudate.

A hyper-elastic decorative stay cable comprises an anchor cable body and two anchoring modules, wherein the two anchoring modules are positioned at the two ends of the anchor cable body. The hyper-elastic decorative stay cable at least comprises a lower casing and a supporting ring as well as a hyper-elastic adjusting device, wherein the supporting ring is positioned in the lower casing; the hyper-elastic adjusting device comprises an adjusting rod, a hyper-elastic body, a nut, a locking nut and a connecting device; the connecting device is a connecting device A, which is formed by a bearing plate, a connecting plate and a nut connecting plate, or a connecting device B, which is formed by fixed cylinders; the adjusting rod is connected with the anchor cable body after penetrating through the bearing plate or the bottom of the fixed cylinder; the hyper-elastic body, the nut and the locking nut sleeve the adjusting rod in sequence; and a plurality of technical schemes with different structures may be generated according to different structures of the two anchoring modules at the two ends of the anchor cable body as well as different structures and different positions of the hyper-elastic adjusting device. The hyper-elastic decorative stay cable provided by the invention is advantaged in that the structure is reasonable; the cable satisfies requirements on appearance and dimension of the cable body; no great additional tension is generated on the structure; the cable is convenient to replace; and the length and the force of the cable are convenient to adjust.

The present application provides a design and manufacturing method of a sealing structure of an oil well pipe joint, and a sealing method. The manufacturing method includes: determining the contact pressure stress of the sealing surface of the oil well pipe, the elastic strain amount of the sealing structure material, the strength of the sealing structure material, The contact width of the sealing surface; according to the sealing safety margin of the oil well pipe, the material elastic strain of the sealing structure is greater than 0.5%; according to the contact compressive stress of the sealing surface, the material elastic strain of the sealing structure, and the strength of the sealing structure material, determine the sealing structure. Use material; according to the determined elastic strain amount of the sealing structure material, determine the used material of the sealing structure to be a superelastic alloy material with an elastic strain amount greater than 0.5%; manufacture the sealing structure according to the used material and its elastic strain amount. By using the various embodiments of the present application, the reliability of the joint sealing performance of the oil country tubular goods is improved.

The present invention proposes a direct-push mechanical 3D iris device based on superelastic shape memory alloy blades, including an iris mechanism module and a drive module; the iris mechanism module includes blades, an outer shell and an inner shell; the blades are superelastic shape memory alloy blades; The bottom of each superelastic shape memory alloy blade is fixed on the same blade ring, and the free shape of all superelastic shape memory alloy blades is the hemispherical shape when the blade is closed; the driving module can drive the blade ring to move in the axial direction; when the driving module drives the blade When the ring retracts in the axial direction, the blades of the superelastic shape memory alloy are opened, deformed by the action of the outer shell and the inner shell, and retracted between the outer shell and the inner shell; when the driving module drives the blade ring to extend axially, the superelastic shape Memory alloy blades protrude from between the outer shell and the inner shell and restore the free shape. The invention overcomes the disadvantage that the traditional 3D spherical iris shell needs to be designed as a spherical surface, so the iris device can be designed as a straight cylinder, and the head diameter is increased.

The invention relates to a preparation method for a porous nickel titanium / hydroxyapatite composite material, and belongs to the technical field of biomedical material preparing. The preparation method for the porous nickel titanium / hydroxyapatite composite material comprises the steps that firstly, nickel titanium mixed powder is obtained by mixing nickel metal powder and titanium metal powder evenly; secondly, the obtained nickel titanium mixed powder is mixed with hydroxyapatite powder, and nickel titanium / hydroxyapatite powder is obtained; thirdly, after the nickel titanium / hydroxyapatite powder is mixed with ammonium bicarbonate pore forming agent powder, a briquetted pressing blank is formed through mechanical compression and then put into a discharge plasma sintering furnace to be sintered; and fourthly, after sintering is completed, the briquetted pressing blank is cooled to the room temperature along the furnace, then the hyper-elastic porous nickel titanium / hydroxyapatite composite material is obtained. The porous nickel titanium / hydroxyapatite composite material prepared through the method has the advantages of being controllable in pore parameter, low in elasticity modulus, good in mechanical adaptability and the like; in addition, the porous nickel titanium / hydroxyapatite composite material is endowed with good biological activity and synosteosis capacity, so that the composite material is closer to the structure and functions of a human bone, and good biological adaptability is achieved; the material is particularly suitable for plastic surgery medical apparatus and instruments, marrow cavity implants and the like.

A hyper-elastic decorative stay cable comprises an anchor cable body, two anchoring modules, an upper casing, a lower casing and a supporting ring, wherein the two anchoring modules are positioned at the two ends of the anchor cable body; the upper casing is positioned outside the anchor cable body; the supporting ring is positioned in the upper casing or the lower casing; and one end of the upper casing is connected with a lug module at one end of the anchor cable body. The hyper-elastic decorative stay cable further comprises a hyper-elastic adjusting device positioned in the upper casing or the lower casing, wherein the hyper-elastic adjusting device comprises a connecting head stopping block, a casing, a hyper-elastic body and a pressing rod; a connecting head is a cylinder with unequal diameters; an external thread connected with the lower casing or the casing of the hyper-elastic adjusting device is arranged outside the connecting head; a through hole allowing the anchor cable to pass through is formed in the middle of the connecting head; a big boss used as a stressed surface of the hyper-elastic body is arranged at one end of the pressing rod; and the other end of the pressing rod is connected with the lug module through a thread connecting method. The hyper-elastic decorative stay cable provided by the invention is advantaged in that the structure is reasonable; the cable satisfies requirements on appearance and dimension of the cable body; no great additional tension is generated on the structure; the cable is convenient to replace; and the length and the force of the cable are convenient to adjust.