4results about How to "Good radial support" patented technology

The invention discloses a road sweeper fluted disc meshing transmission front wheel with a nitrogen damping function, and relates to the technical field of vehicle engineering, the road sweeper fluted disc meshing transmission front wheel comprises a front fork weldment, deep groove ball bearings III are mounted on the two sides of the front fork weldment, and crank weldments are connected to the outer sides of the deep groove ball bearings III in a sleeving manner; nitrogen buffer shock-proof modules are installed at the bottom of the front fork weldment and the top of the crank weldment and used for reducing shock of the sweeper in the running process. The nitrogen buffer shock-proof module comprises spring seats installed at the bottom of the front fork weldment and the top of the crank weldment, and a nitrogen shock absorber is installed between the lower set of spring seats and the upper set of spring seats. Through the nitrogen buffering and shock-absorbing module, the problems that the vehicle is difficult to control and the sweeping operation quality is affected due to bumpy road surfaces can be solved, and the continuity and high efficiency of sweeping operation are guaranteed.

The application discloses a large vein stent for treating venous diseases, and particularly discloses a venous stent with radial support and flexibility, which comprises a first stent and a second stent, the first stent comprises a first overlapping section and a first support section connected with the first overlapping section, and the second stent comprises a second overlapping section and a second support section connected with the second overlapping section.The venous stent can realize good overlapping and cooperation of the first stent and the second stent, and the overlapping and fixing of the two stents have better stability without increasing the overlapping length.The first stent has better flexibility, and the second stent has better radial support, so that the whole has both flexibility and radial support.

The present invention provides a thoracic aortic covered stent, which relates to the field of medical devices. The proximal section of the main support frame of the main stent includes a wavy proximal stent ring, and at least two groups of fish-mouth stents that are integrally connected to the proximal stent ring and extend to the proximal side of the proximal stent ring; each group of fish-mouth stents includes two symmetrically arranged arc-shaped stent units; the planes where each arc-shaped stent unit is located are respectively inclined radially outward from the distal end to the proximal end along the main covering; the arc-shaped stent units of each adjacent group of fish-mouth stents cross each other in a grid shape, and each two intersecting arc-shaped stent units overlap each other. The thoracic aortic covered stent provided by the present invention has good radial support force, softness and elasticity, can avoid internal leakage, and avoid the proximal end of the stent irritating the inner wall of the blood vessel; it can also avoid the clamping of the branch stent, reduce the compression size of the integrated branch stent, and improve the tolerance of the misalignment between the opening of the embedded stent and the opening of the branch blood vessel.

This invention relates to the field of medical materials technology, and discloses a biodegradable esophageal stent and its preparation method. The esophageal stent is woven from blended monofilaments. The raw materials for the blended monofilaments include polylactic acid, polycaprolactone, and additives, including polyethylene glycol, carbon nanofibers, star-shaped PLA-PCL block copolymer, and talc. The preparation steps are as follows: the raw materials are mixed in proportion, melt-blended and granulated, and then the blended monofilaments are obtained using a high-pressure capillary rheometer; the blended monofilaments are woven into a mesh-like stent framework on a mold using an interlaced pressing method, then heat-set, and demolded after cooling; a thermoplastic polyurethane casting liquid loaded with bioactive substances is cast into a film and coated onto the inner wall of the stent framework; the thermoplastic polyurethane film is heated to fuse with the stent framework, and after cooling, the esophageal stent is formed. The esophageal stent of this invention has good mechanical properties, controllable degradation characteristics, and biocompatibility.