42results 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 present invention relates to a stent graft, comprising a stent main body and a first film coated on the stent main body, at least two blocking rods are arranged on the outer wall of the stent grafting, each of the two blocking rods The ends are respectively connected with the stent main body, and at least one layer of second film is provided on each of the blocking rods, and the second film is connected with the first film to block the blood flow from the proximal end of the stent graft. The end flows out from the distal end of the stent-graft through the inside of the blocking rod; the blocking rod is folded and attached to the outer wall of the stent-graft in the delivery state, and rebounds to expand to the outer wall of the stent-graft after being released. The outer walls of the stent-graft intersect. The covered stent of the invention can solve the endoleak problem in the chimney operation, and reduces the difficulty of sheathing the covered stent.

The invention discloses an integrated electro-hydraulic servo mechanism for a cabin. The servo mechanism is composed of a body, a motor pump combination, a hydraulic assembly, a mechanical transmission mechanism and a control mechanism, wherein the motor pump combination, the hydraulic assembly, the mechanical transmission mechanism and the control mechanism are integrally installed on the body. After being powered on, a motor drives a constant-pressure variable pump to rotate so as to enable electric energy to be converted into hydraulic energy; the hydraulic assembly is mainly composed of an oil tank, a pressurization component, a check valve, a high-pressure safety valve, a low-pressure safety valve, a filing valve, a high-pressure oil filter, a low-pressure oil filter, a hydraulic cylinder, an energy accumulator, an electro-hydraulic servo valve and the like; the mechanical transmission mechanism comprises a piston connecting rod, an actuating cylinder, a rocker, a connecting rod mechanism, a locking mechanism and the like; the control mechanism comprises a plug, a socket, a linear displacement sensor used for detecting the position of a piston rod in the actuating cylinder and a control circuit board for achieving closed loop of a system. The servo mechanism has the advantages of being high in power-to-volume ratio and power-to-weight ratio, rapid in response, high in rigidity, high in control accuracy and the like.

The invention discloses a high-low pressure heater emergency drain control method which is applicable to a distributed control system. The distributed control system comprises a heater, a high-pressure heater emergency drain control valve, a low-pressure heater emergency drain control valve and an emergency drain control valve front valve. In particular, the control method includes the steps that an adjusting deal zone is arranged in the valve control logic of the high-pressure heater emergency drain control valve and the low-pressure heater emergency drain control valve, the emergency drain control valve front valve is set to be an electrically operated gate, and the control logic of the electrically operate gate is added. Compared with the prior art, the adjusting deal zone is arranged in the valve control logic of the high-pressure heater emergency drain control valve and the low-pressure heater emergency drain control valve, so that stay of the valves at the small opening is avoided, the blowing loss of valve elements is reduced, inner leakage of the valves is reduced, and blowing loss and leakage of the emergency drain valve bodies are reduced; meanwhile, the emergency drain control valve front valve is set to be the electrically operated gate, and the control logic of the electrically operate gate is added, so that the airtightness of the emergency drain control valves is guaranteed, and the safety and economy of a unit are improved.

The invention discloses a turbine box with variable radial clearance and double inlets, which comprises: an impeller, a left air flow passage, a right air flow passage and a middle partition; The left and right are arranged side by side, the middle partition is located between the left air flow passage and the right air flow passage, and is arranged at the meridian plane of the turbine box; the axial direction of the middle partition is annular, and the inner edge is It is circular and has a spiral outer edge, and the radial gap between the inner edge of the intermediate partition and the inlet of the turbine impeller can gradually increase linearly within the range of 0° to 360° in the circumferential direction of the vortex tongue. The invention reduces the internal gas leakage of the left and right airflow passages of the double-entrance turbine box, and at the same time helps to reduce friction loss, increase the cross-sectional flow area of ​​the turbine box, and reduce or not increase the turbine speed when the engine is running at high speed. The resulting back pressure reduces the fuel consumption of the engine.

The invention provides a self-expandable segment tectorial asymmetric areolate stent for intracranial aneurysm. In the stent, a tubular hollow structure frame consists of two spirally and symmetrically arranged main support rods and asymmetrically arranged V-shaped connecting rings, and an externally applied membrane material is coated on the frame to form the stent. The releasing mode of the stent is self-expandable release, so that the stent is convenient to convey by virtue of a microcatheter system, is good in flexible performance, and is especially suitable for being applied to intracranial curved section vascular aneurismal lesion.

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 includes a motor, a retarder and a pump body assembly. The drive shaft in the pump body assembly is supported by first and second bearings. The driven shaft is supported by third and fourth bearings. A first rotor and a drive gear are disposed on the drive shaft. A second rotor and a driven gear are disposed on the driven shaft. The first rotor is located between the first and second bearings. The second rotor is located between the third and fourth bearings.