41results about How to "Reduce endoleak" patented technology

A stent graft (5) comprises a tubular graft member (4), and a plurality of sloping stent members (3) substantially coaxial with and coupled to the tubular graft member (4). Each of the sloping stent members (3) comprises multiple uneven apexes characterizing a round tubular configuration with a distal end and a proximal end disposed about a longitudinal axis. The distal apexes of the sloping stent member (3) are arranged in substantially the same plane substantially horizontal to the longitudinal axis of the sloping stent member and the proximal apexes are arranged in a sloping plane oblique to the longitudinal axis.

The invention provides a special blade swinging type hydraulic cylinder for a robot motion joint, and the special blade swinging type hydraulic cylinder can bear large axial force and capsizing moment. A mechanical seal structure is adopted, a dustproof ring is removed, and therefore the special blade swinging type hydraulic cylinder is simple in structure, compact in space layout, reasonable in design, little in inner leakage, large in torque density and convenient to integrate. The special blade swinging type hydraulic cylinder comprises an upper end cover, a rotation shaft, a cylinder body,a fixed sheet and a lower end cover. A side protruding ring is arranged on the outer ring face of the axial middle area of the rotation shaft, and a side protruding blade is arranged on the side protruding ring in the radial direction. An integral structure is integrally formed by the side protruding blade, the side protruding ring and the rotation shaft. The upper end cover sleeves the rotationshaft and is located at the upper portion of the side protruding ring. The lower end cover sleeves the rotation shaft and is located at the lower portion of the side protruding ring. The side protruding blade is in the zero-position state, and the other end opposite to the side protruding blade in the radial direction is provided with the fixed sheet. The inner wall of the fixed sheet and the outer wall of the side protruding ring are arranged in a clearance manner, and a sealing device is arranged in the axial direction of the fixed sheet and the side protruding blade.

The invention relates to a high-compliance thoracic aorta covered stent as well as a sizing mould and a sizing method thereof. The high-compliance thoracic aorta covered stent comprises a coating material and a metallic framework, wherein the coating material attaches to the surface of the metallic framework, so that a tubular structure is formed; the coating material is also fixedly connected with the metallic framework by means of medical sutures; the metallic framework comprises a plurality of W-shaped support rings and screw-type support rings, wherein each screw-type support ring is positioned between every two adjacent W-shaped support rings, and the two ends of each screw-type support ring are respectively and fixedly connected with the every two adjacent W-shaped support rings; one end of the coating material is provided with a W-shaped uncoated stent, and the two ends of the coating material are respectively provided with a development mark. The high-compliance thoracic aorta covered stent is used for interventional therapy of thoracic aortic dissection and thoracic aortic aneurysm, and can improve the compliance of a stent main body; after being implanted into the aorta, the stent can better adapt to the form of the aorta, is better in wall adherence, and can reduce complications such as internal leakage and stent-derived new wound which are caused by stent implantation.

The invention discloses a generator set three-stage parallel serial connection bypass system and an adjusting method thereof. The system comprises a high-pressure bypass system, a low-pressure bypasssystem and a low-low-pressure bypass system; the high-pressure bypass system comprises a high-pressure bypass filter, a high-pressure bypass valve and a high-pressure bypass isolation valve, the low-pressure bypass system comprises a low-pressure bypass filter, a low-pressure bypass valve and a low-pressure bypass isolation valve which are sequentially connected between a reheating steam heat segment pipeline and a condener, the low-low-pressure bypass system comprises a low-pressure cylinder isolation valve and a medium-pressure exhaust low-pressure bypass communication valve, the low-pressure cylinder isolation valve is arranged on an air guide pipe between a medium pressure cylinder and a low-pressure cylinder, an inlet pipeline of the medium-pressure exhaust low-pressure bypass communication valve is arranged on a medium-pressure cylinder exhaust pipeline, an outlet pipeline is arranged on a pipeline between the low-pressure bypass valve and the low-pressure bypass isolation valve,the high-pressure bypass system and the low-pressure bypass system are connected through a high and low pressure bypass communication valve, and a pipeline between the low-pressure bypass valve and the isolation valve is connected with a heat net heater through a low-pressure bypass heat supply adjusting valve.

The invention discloses a backwashing water purification system, which includes an ultrafilter membrane assembly and a backwashing apparatus connected to the ultrafilter membrane assembly. The ultrafilter membrane assembly includes a housing and a plurality of hollow fiber membranes fixed inside the housing through a dish head. The dish head divides the inside of the housing into an upper part which is a low-pressure chamber and a lower part which is a high-pressure chamber. The hollow fiber membranes are put in the high-pressure chamber and have openings that communicate with the low-pressure chamber. The housing further includes a water inlet, a drain outlet and a purified water outlet, wherein the water inlet and the purified water outlet communicate with the low-pressure chamber and the drain outlet communicates with the high-pressure chamber. The purified water outlet is connected to a purified water pipe, and the backwashing apparatus is connected to the purified water pipe. The backwashing apparatus is used to allow water to enter the cavities of the hollow fiber membranes, so that the hollow fiber membranes are made to expand immediately, impurities stacked on the surfaces are loosened, and through combination with high-speed washing of raw water that enters the high-pressure chamber from a water inlet module, impurities on the surfaces of the hollow fiber membranes are effectively cleaned.

The invention relates to a surgical assembly capable of preventing endoleak and provided with a spring coil and a chimney stent. A first support frame is arranged in a main body stent; a first film wraps the first support frame; the main body stent is of a round structure, and a groove for wrapping the chimney stent is defined after the side face of the main body stent is pressed; first artificialfibers are arranged on the part, making contact with the chimney stent, of the groove; a second support frame is arranged in the chimney stent, and a second film wraps the second support frame; second artificial fibers are arranged in the longitudinal direction of the spring coil; the spring coil is wound around the chimney stent; and the chimney stent and the spring coil are implanted into the groove of the main body stent via a stent implanting device. According to the surgical assembly provided by the invention, endoleak can be effectively prevented, complete closure of graft pathologicalarteries can be achieved and the occurrence of complications can be reduced.

The invention discloses a three-way valve assembly of a new energy vehicle cooling system and a control method and belongs to the technical field of new energy vehicles. Through the three-way valve assembly of the new energy vehicle cooling system and the control method, the problems of poor leakproofness, jamming, instable work, low precision, high cost and the like in the prior art are solved, and high applicability is achieved particularly for special occasions with strict requirements for work environment and performance. The three-way valve assembly of the new energy vehicle cooling system comprises a three-way valve shell and a three-way valve core. A drive drives the three-way valve core to rotate, and then a cooling liquid channel is adjusted. The drive comprises a worm-gear transmission mechanism driven by a motor, and a worm gear is connected with a reduction gear unit. The three-way valve core is installed on a reduction gear of the reduction gear unit. The angle needed by rotation of the motor is controlled by a controller. The three-way valve assembly of the new energy vehicle cooling system and the control method have the advantages that structure is reasonable, application range is wide, and work is stable and reliable, and good economic benefits and wide market prospects are achieved.

The invention provides an electromagnetic valve. The electromagnetic valve comprises a valve body part and a piston part, the piston part is movably arranged in an accommodating cavity, the piston part is provided with a closing position and an opening position, and when the piston part is located at the closing position, the piston part blocks an outlet; under the condition that the piston part is located at the opening position, the piston part avoids the outlet and an inlet; the piston part comprises an outer piston and an inner piston structure arranged in a cavity of the outer piston, the outer wall of the outer piston is matched with the inner wall of the accommodating cavity, the inner piston structure is provided with an inner balance hole and a first annular groove formed around the outer wall of the inner piston structure, and the outer piston is provided with an outer balance hole; and the inner balance hole, the first annular groove and the outer balance hole form a balance channel, an opening of the inner balance hole is a first opening, and an opening of the outer balance hole is a second opening. According to the scheme of the electromagnetic valve, the balance channel can be conveniently formed, the piston part can be made to be small in size and compact in structure, and therefore the size of the electromagnetic valve can be reduced.

The invention provides an electromagnetic valve. The electromagnetic valve comprises a valve body component, a piston component and an auxiliary valve. The valve body component is provided with a containing cavity, an inlet and an outlet, wherein the inlet and the outlet communicate with the containing cavity. The piston component is movably arranged in the containing cavity and provided with a balance channel, the two ends of the balance channel are provided with a first opening and a second opening correspondingly, the first opening is located in the side, deviating from the outlet, of the piston component, and the second opening communicates with the inlet. The piston component has a closing position and an opening position, and under the condition that the piston component is at the closing position, the piston component blocks the outlet; and under the condition that the piston component is at the opening position, the piston component avoids the outlet and the inlet. The auxiliary valve is movably arranged in the balance channel, a preset gap is formed between the auxiliary valve and the inner wall of the balance channel, and the auxiliary valve has a first state for blocking the first opening and a second state for avoiding the first opening. By adopting the scheme, the problem that the electromagnetic valve is not easy to open in a high-pressure environment can be solved.

The invention discloses a blade of a direct-current electric gasoline pump. The blade is in a cuboid structure, rib strips are distributed on the front side of the cuboid structure, and oil discharging grooves are formed among the rib strips; the blade is characterized in that the thickness of the solid cuboid is greater than 1 mm, and the distance from the top end of each rib strip to the top end of the cuboid is greater than 0.1 mm. The thickness of the blade ensures that a blade main cutting edge has high abrasion resistance capability, and only when the blade main cutting edge is abraded unitl the position of the rib strips, the rib strips are contacted with the cylindrical inner side face of a pump body; by using the structre above, the service life of the blade is prolonged and the inner leakage of a blade pump is reduced.

The bistable four-way electromagnetic reversal valve includes two valve cavities, their interior is respectively equipped with slide valve core, the middes and front ends of two valve cavities are communicated and respectively connected with pipes of E, C, S and D. Besides, it also includes two control valve cavities with poppet, the middles of two control valve cavirites are simultaneously communicated with pipe S, and frnot ends of two control valve cavities are respectively connected with pipe E or pipe C.

The invention provides an implantable medical device and an implantable medical device suite, the implantable medical device comprises a main body lumen structure, the main body lumen structure comprises a main body stent and a covering film, the covering film covers the main body stent to form a delivery channel with two open ends, and the delivery channel is communicated with the main body stent. At least one opening capable of being opened and closed is formed in the covering film, the opening divides the main body pipe cavity structure into a near-end part and a far-end part, and when the near-end part or the far-end part is compressed in the radial direction and the far-end part or the near-end part is not compressed in the radial direction, the opening is in an open state; when the main body pipe cavity structure is in a radial unfolding state, the opening is in a closed state; and in the opening state, the opening is communicated with the conveying channel. The implantable medical device can keep the blood flow smooth in the operation process, and can avoid or reduce internal leakage after the operation is completed.