31results about How to "Increase the inner surface" patented technology

A table may include a table top that is constructed from blow-molded plastic and the table top may include a generally downwardly extending lip. The lip may include reinforcement portions that are sized and configured to increase the strength, rigidity, resilience and / or flexibility of the lip and / or the table top. The table top may include one or more depressions and the depressions may have different characteristics in different directions. For example, the depressions may have an elongated length and the depressions may have increased strength along its length. Advantageously, the different characteristics of the depressions and / or reinforcement portions may be used to create a table top with increased and / or uniform strength, rigidity, resilience and / or flexibility.

An improved tool and method for enhancing the surface of a heat transfer tube are provided. The tool, which can be easily added to existing manufacturing equipment, includes cutting bits that may be retracted with a housing. The cutting bits include a cutting edge to cut through the surface of a tube and a lifting edge to lift the surface of the tube to form protrusions. A method for enhancing the inner surface of the tube includes mounting a tool on a shaft, positioning the tool in the tube and causing relative rotation and axial movement between the tube and the tool to cut at least partially through at least one ridge formed along the surface of the tube to form ridge layers and lift the ridge layers to form protrusions.

A turbine airfoil has a suction side wall and a pressure side wall of an airfoil cavity, through which a cooling fluid flows for cooling of the side walls. The suction side wall has one or more protrusions extending therefrom into the airfoil cavity. The protrusions are arranged such that: a number of the one or more protrusions on the suction side wall is higher than a number of protrusions on the pressure side wall; and / or a protrusion density on the suction side wall is higher than a protrusion density on the pressure side wall, and / or a total protrusion surface area on the suction side wall is larger than a total protrusion surface area on the pressure side wall, so that the heat transfer from the suction side wall to the cooling fluid is higher compared to that of the pressure side wall during operation of the turbomachine.

A small-diameter drill for deep hole drilling is provided which is capable of inhibiting the cutting chips from getting bitten and producing a straightness for a drilled hole, thus suitable for drilling a hole having a depth (L) which is 15 or more times the diameter (D) of a drilled hole. The small-diameter drill 1 has a diameter 2 which is 1 mm or less and a drill section 5 including cutting edge(s) 3 and flute(s) 4. The length 11 of the flute 4 is at least 5 times and at most 10 times the drill diameter 2. The diameter of the drill section 5, after being reduced in diameter from the cutting edge 3 toward the rear of the drill section 5, is expanded in diameter so that the outer diameter at the end of the flute 4 becomes at least 0.9 times and at most 0.98 times the drill diameter 2. An expanded-diameter portion 10 is provided between the drill section 5 and a neck section 6 connected to a shank 7 and is expended in diameter from the outer diameter at the end 9 of the flute 4 up to 1 or less times the drill diameter 2. The diameter of the neck section 6 is smaller than the drill diameter 2, and the length 12 of the neck section 6 is 10 or more times the drill diameter 2.

A storage space device for the transport and / or storage of nuclear materials, comprising a main structure defining at least one housing intended to contain the nuclear materials and includes a mobile heat conduction structure forming at least one portion of a side outer surface of the storage space device. The mobile structure has at least one mobile heat conduction component mounted on the main structure so as to be displaceable reversibly from a retracted position to a deployed position while moving away from the structure.

Provided is a pneumatic tire whose safety factor and durability are improved without generating a problem of an increase in the weight of a tire and an increase in the inner surface cord protrusion failure. Provided is a pneumatic tire including one or more carcasses 2 extending toroidally between bead cores 1 embedded in a pair of bead portions 11 respectively. A polyester fiber cord whose total decitex as a twisted cord is 4300 to 5100 dtex, whose cord strength as a dip treated cord is 6.5 to 7.2 cN / dtex and whose cord elongation at a stress loading of 2 cN / dtex is 3.5 to 4.0% is used as a reinforcing cord of the carcass 2, and the tenacity of a treat which is the reinforcing cord covered with rubber per unit width is 2.9 to 3.2 kN / cm.

In this flat extruded aluminum multi-port tube, the corrosion-resistance, at inner surfaces of a plurality of flow passages independently and parallelly extending in the tube axial direction, is effectively enhanced. In a flat extruded aluminum multi-port tube 10 formed by an extrusion by employing an aluminum tube material and an aluminum sacrificial anode material having an electrochemically lower potential than the aluminum tube material, the aluminum sacrificial anode material is exposed to form a sacrificial anode portion 18 at least in a part of an inner circumferential portion in each of the plurality of flow passages 12.

A storage space device for the transport and / or storage of nuclear materials, comprising a main structure defining at least one housing intended to contain the nuclear materials and includes a mobile heat conduction structure forming at least one portion of a side outer surface of the storage space device. The mobile structure has at least one mobile heat conduction component mounted on the main structure so as to be displaceable reversibly from a retracted position to a deployed position while moving away from the structure.

A modified cellulose / polylactic acid composite preparation method belongs to the technical field of biomass energy chemical engineering and comprises the following steps: hemicellulose of maize straw is hydrolyzed through acid, and then maize straw is pretreated by alkaline-soluble lignin to prepare a cellulose precursor; the cellulose precursor is crushed and dispersed to prepare fibrillation cellulose, and then fire-retardant impregnation and low-temperature oxidation treatment are performed to obtain dehydroxylation cellulose; dehydroxylation cellulose is scattered, and low-temperature carbonization is performed to prepare carbon fibers; the fibrillation cellulose is oxidized by sodium hypochlorite to prepare carboxylated cellulose, and carboxylated cellulose and polyethylene glycol are esterified to prepare esterified cellulose; and dehydroxylation cellulose, the carbon fibers and the esterified cellulose are added into an internal mixer to be subjected to kneading mixing with polylactic acid, and an open mill is adopted for homogenization scattering to prepare a modified cellulose / polylactic acid composite. Cellulose is modified by different methods, particularly mechanical scattering and crushing, flame-retardant impregnation, low-temperature oxidation, high-temperature carbonization, carboxylation and esterification, so that the strength and the mobility of cellulose are improved, and the polylactic acid interfacial compatibility is improved.

The invention relates to methods and apparatus for manufacturing implantable medical devices, such as intravascular stents, wherein the medical device has a surface treated to promote the migration of endothelial cells onto the surface of the medical device. In particular, the surface of the medical device has at least one groove formed therein, the at least one groove may have a drug-eluting polymer disposed therein or a drug-eluting polymer coating may be provided on the surface of the medical device and grooves formed in the drug eluting polymer coating.