146results about How to "Increase burst pressure" patented technology

A catheter for medical procedures comprises a shaft portion having a distal end insertable into a body lumen, the shaft portion having a wall defining a working lumen extending therewithin and a first strengthening element coupled to the wall to increase a burst pressure of the shaft portion, wherein the first strengthening element cooperates with a base material of the wall to define a flexible region of the shaft portion allowing the shaft portion to be atraumatically inserted into the body lumen.

An expandable medical device or component thereof including a tubular body formed of a wrapped sheet of porous polymeric material fused together, the tubular body having a fused seam at an angle relative to the longitudinal axis of the tubular body which changes along the length of the tubular body from a first angle to a second angle greater than the first angle. The sheet of porous polymeric material is wound and then fused together such that the winding angle is less in a first longitudinal section of the tubular body compared with the winding angle in a second longitudinal section of the tubular body, in order to provide the second section with greater resistance to expansion (i.e., lower compliance) than the first section.

A flexible hose comprising a tube, a knit fabric, and a cover. The knit fabric comprises a hybrid yarn which comprises a first yarn of co-para-aramid fibers and a second yarn of meta-aramid fibers. The hose exhibits significantly improved burst pressure and/or improved impulse fatigue resistance.

The invention provides a technique and an apparatus for producing a reinforced thermoplastic pipe. The technique comprises the following steps: 1) sending granular PE to a hopper of an extruding machine by negative pressure; 2) heating PE plastic by a first extruding machine, and continuously extruding the PE plastic by a die head with high pressure; 3) cooling the molten PE by water into a PE internal pipe under negative pressure through a vacuum calibrating sleeve of a vacuum water tank; 4) cooling and forming the PE internal pipe continuously in a spray water tank; 5) drying the surface of the PE internal pipe taken from the spray water tank by a first air cooler; 6) pulling the PE internal pipe continuously and stably by a hauling machine which provides power for forming the PE internal pipe; 7) winding a plastic covered reinforcing band made of steel wire or fiber yarn twisted ropes by a winding machine with constant tensile force in opposite directions respectively on the PE internal pipe or the outermost layer of the PE internal pipe; 8) wrapping the molten PE plastic on the outside of the wound reinforcing band through an external composite die head by a second extruding machine to form a wrapped RTP pipe; 9) spraying and cooling to form the wrapped RTP pipe in the water tank; and 10) drying the surface of the RTP pipe taken from the water tank by a second air cooler. The technique is simple and feasible. The apparatus has simple structure, good operating performance and stable and reliable operation.

The invention provides a constant volume bomb for a diesel spraying and burning visualization experiment. The constant volume bomb comprises a constant volume bomb body. The constant volume bomb body uses the circular-cake-shaped structure, the interior is hollow and used for forming the visualization experiment area, two sides of the circular cake are opened with visualization window holes and the end faces of the windows are pressed by sealing cover plates for sealing. The quartz glass is clamped between the body and the sealing cover plates. The upper end face is opened with a positioning hole for an oil sprayer installing base, and the unique design is suitable for use of various oil sprayers. The lower end face is opened with a positioning threaded hole for fixing the position of the constant volume bomb. The constant volume bomb body is radially opened with various installing through holes for installing various data collecting devices. The visualization spraying constant volume napalm bomb has the characteristics of simple structure, wide experiment area and transparent light path, and is capable of observing and measuring the spraying and burning processes through cooperating the schlieren method and the laser-induced fluorescence technology, remarkably improving the experiment efficiency, performing the spraying feature test to different oil sprayers and improving the adaptability of the spraying constant volume test bomb.

The present invention refers to medical devices. Particularly it relates to stent devices and balloon catheter devices. In the most particular aspect of the invention it relates to balloon catheter devices carrying stents (2) with the medical balloon (3) comprising an inner layer (4) having a lower compliance rate and/or burst pressure than the outer layer (5) and an outer layer (5) having on the outer surface (6a) a higher adhesion strength than the inner layer (4), and its use in a variety of medical procedures to treat medical conditions in animal and human patients.

A plastic hose, and more particularly a pneumatic hose, is provided with at least two electrical conductors extending along the hose body. These conductors are in the form of strips (11 and 12) of a metallized braid of plastic material or of natural fiber with a spacing apart on the hose body (13). Accordingly high flexibility of the plastic hose (10) is achieved with satisfactory electrical conductivity of the strips ensuring safety as regards breakage.

A fluidic artificial muscle actuator consisting of an inner elastic bladder surrounded by a braided filament sleeve and sealed off on either end with end fittings. Pressurization of the actuator produces force and/or motion through radial movement of the bladder and sleeve which forces the sleeve to move axially. Both contractile and extensile motions are possible depending on the geometry of the braided sleeve. The fluidic artificial muscle actuator is manufactured using a swaging process which plastically deforms swage tubes around the end fittings, braided sleeve, and pressure bladder, creating a strong mechanical clamping action that may be augmented with adhesive bonding of the components. The swaging system includes the swaging die and associated components which are used to plastically deform the swage tube during assembly of the actuator.

An elongate tape element and method of manufacturing flexible pipe body are disclosed. The elongate tape element (12) which is for providing at least one helically wound layer of windings in a flexible pipe body (10), comprises an elongate body having a base surface (20), a top surface (22) opposed to the base surface and opposed first and second side walls (24, 26) extending between the base and tope surface wherein at least one surface and/or side wall of the body comprises a recessed region for receiving a respective portion of a tape element holder member when said tape element is wound to form a layer of windings.

Implantable materials for medical or surgical applications comprising specific chemical groups on their surface to alter the physico-chemical properties of said material rendering it suitable implantation or biocompatible properties.

The present invention discloses a preparation method for a hexanitrohexaazaisowurtzitane and m-dinitrobenzene co-crystallized explosive, wherein a crystallization solvent is adopted to prepare a hexanitrohexaazaisowurtzitane and m-dinitrobenzene saturated solution, and a constant temperature incubator is adopted to perform solvent evaporation and crystallization to obtain the hexanitrohexaazaisowurtzitane and m-dinitrobenzene co-crystallized explosive. According to the present invention, crystal density of the hexanitrohexaazaisowurtzitane and m-dinitrobenzene (CL-20-DNB) co-crystallized explosive is significantly increased by 19.6% compared with crystal density of DNB, detonation velocity and detonation pressure of the CL-20-DNB co-crystallized explosive are respectively increased by 46.2% and 147.5% compared to detonation velocity and detonation pressure of DNB, and the CL-20-DNB co-crystallized explosive has characteristics of a good detonation performance and high safety performance, and can be used for preparing low sensitivity ammunition.

The invention relates to a subcritical vapor auxiliary work done gasoline engine which comprises a water injector in a cylinder of the gasoline engine, wherein, the water injector comprises a water tank, an electric control unit, and water pumps, a water guideway, a water injection nozzle and a temperature sensor which are controlled by the electric control unit. The water injector is characterized in that the water pumps comprise a low pressure water pump and a high pressure water pump pressurizing water to be above 200bar, the low pressure water pump is arranged in the water tank and is communicated with the high pressure water pump, the high pressure water pump is communicated with the water guideway by a high pressure water pipe, the water injection nozzle is communicated with the water guideway, and a water injection opening extends into a combustion chamber of the gasoline engine. The gasoline engine also comprises a gasoline engine exhaust pipe used for heating water to above 250 DEG C and not more than 374.2 DEG C, and a high pressure water pipe penetrates through the exhaust pipe and then is communicated with the water guideway. The gasoline engine utilizes the waste heat of engine tail gas to do work circularly, thereby saving oil; the temperature of water injected into the cylinder is in a subcritical state, and the water is instantaneously vaporized in the cylinder under the pressure condition, thereby increasing the explosion pressure of the cylinder; and the torque output and the power are improved under the premise that the oil injection amount is not increased.

The invention relates to a marine peptide product and application thereof in preparing a medicament for promoting caesarean section postoperation recovery, a health food or food. The marine peptide is a group of low-molecular weight oligopeptide mixture which adopts fish skin, fish bones or fish flesh of marine fishes as main raw materials, is produced by hydrolysis through an enzyme method, can be dissolved by trichloroacetic acid, has the relative molecular mass of smaller than 1,000 and comprises marine collagen peptide (derived from the fish skin), marine bone-derived peptide (derived from the fish bones) and marine protein peptide (derived from the fish flesh). The invention has the characteristics of easy and rapid absorption, low viscosity, good water solubility, and the like. Animal tests prove that the marine peptide has the effects of promoting skin peptide wound healing after a caesarean section operation and promoting the wound healing of the uterus.

The invention discloses a method for casting an aluminum piston of a gasoline engine. Based on the traditional gravity casting method, the method also comprises the following steps of: adopting powder metallurgy material with good air permeability to manufacture a mould; carrying out optimization and simulation on the structure of the mould and the casting technology by MAGMAsoft solidification simulation analysis software; after moldassembly, introducing inert gas into a mold cavity of the mould before the mould is poured; and carrying out gas pressurization on molten aluminum in the stage of piston solidification. The method further improves the casting quality of the piston, thus providing the aluminum piston of the gasoline engine which is suitable for various complex structures and high in explosion pressure, strength and performance.

The invention discloses a compressed natural gas bottle with a 35MPa aluminum alloy inner container fully wound with basalt fiber. The compressed natural gas bottle comprises a natural gas bottle bodywith the aluminum alloy inner container. A basalt fiber winding layer is arranged on the outer surface of the aluminum alloy inner container in a layered order in a fully winding mode, the basalt fiber winding layer comprises a circumferential winding layer winding around a aluminum alloy inner container cylinder body and a spiral winding layer winding around the aluminum alloy inner container cylinder body and heads at the two ends, and the spiral winding direction of the aluminum alloy inner container cylinder body and the heads at the two ends is consistent and continuous; and the aluminumalloy inner container is first subjected to shot blasting, and then is wound with the basalt fiber winding layer , after winding the aluminum alloy inner container, the outer surface of the basalt fiber winding layer is coated with a protective layer, and the protective layer is bisphenol A epoxy resin. The natural gas bottle can increase the working pressure of a CNG bottle for the vehicle to 35MPa, the utilization rate of the gas storage can be improved, the driving range of CNG vehicles is increased to reach the same mileage as gasoline vehicles, the strength of the aluminum alloy inner container is strengthened, and the anti-pressure ability, yield pressure, burst pressure and anti-fatigue ability of the natural gas bottle are improved.

The invention relates to a rubber hose of an air conditioning system with novel refrigerant carbon dioxide. The low-infiltration rubber hose of an air conditioner sequentially comprises the following seven layers from inside to outside: an internal infiltration layer nylon PA11, a middle rubber layer CIIR rubber, an internal reinforced layer dipping aramid cord, a bonding layer EPDM rubber, an external reinforced layer dipping aramid cord, a external rubber layer EPDM rubber and an external plastic-covered layer TPX. The internal infiltration layer plays a role of blocking the refrigerant from infiltrating to outside, the middle rubber layer has good heat resistance and air-tightness and can be bonded firmly to the infiltration layer so as to further stop the dispersion of the refrigerant; the two reinforced layers are bonded firmly to the bonding layer so as to increase the pressure resistance of the rubber hose; the external rubber layer has good heat resistance, ozone resistance and weatherability; and the external plastic-covered layer protects the smoothness and levelness of the appearance of the rubber hose. Due to different materials of the internal infiltration layer and the fiber reinforced layer and the different selected structure, the infiltration resistance of the rubber hose is improved by 4 times, and the bursting pressure is improved by 2.5 times.