1770results about How to "Prevent burst" patented technology

Combination of an endoscope and a sheath for covering an inserting tube of the endoscope, the sheath includes an elastic tubular member having an open proximal end and a closed distal end, and the endoscope is provided with an air feeding tube for feeding air from a distal end of the inserting tube to inflate the tubular member when the inserting tube is inserted into the tubular member to be covered therewith.

An extended release dosage composition of pharmaceutically active substances that have a water contact angle (θ) such that cos θ is between +0.9848 and −0.9848 presented as a matrix tablet containing the said pharmaceutically active substances, with/without suitable pharmaceutical excipients in intimate mixture with two groups of intelligent polymers having opposing wettability characteristics, one demonstrating a stronger tendency towards hydrophobicity and the other a stronger tendency towards hydrophilicity, the polymer combination being between the ratios of 1:50 and 50:1 amounts effective to control the release of said pharmaceutically active substances in a mathematically predictable manner, wherein the polymer demonstrating a stronger tendency towards hydrophobicity is not less than 5% wt/wt and preferably between 5-70% wt/wt of the final formulation composition. The intelligent polymers being ethylcellulose (EC) as a more strongly hydrophobic and hydroxyethylcellulose (HEC) and/or hydroxypropyl methylcellulose (HPMC) as more strongly hydrophilic (the ratio of HEC to HPMC being between 1:100 and 100:1). The matrix tablet is optionally coated with an enteric coat, 0-5%-15% wt/wt to prevent the initial burst effect seen in such systems and to impart gastrointestinal tract (GIT) “stealth” characteristics especially in the presence of food.

The present invention relates to a risperidone sustained release delivery system for treatment of medical conditions relating delusional psychosis, schizophrenia, bipolar disorder, psychotic depression, obsessive-compulsion disorder, Tourette syndrome, and autistic spectrum disorders. The sustained release delivery system includes a flowable composition containing risperidone, a metabolite, or a prodrug thereof and an implant containing risperidone, a metabolite, or a prodrug thereof. The flowable composition may be injected into tissue whereupon it coagulates to become the solid or gel, monolithic implant. The flowable composition includes a biodegradable, thermoplastic polymer, an organic liquid, and risperidone, a metabolite, or a prodrug thereof.

The invention provides a quick precision casting method for complex parts. The method uses a photosensitivity rapid prototyping technique to prepare a resin part prototype, a pouring system resin prototype and a resin process die shell which are then combined together to form a die; the method uses a gel-casting processing technique to pour ceramic slurries with high solid-phase and low viscosity into the die cavity so as to form a ceramic casting blank by quick in-situ solidification; the ceramic casting blank is dried and the resin prototype is burned and sintered to obtain the ceramic casting which contains the downsprue; finally, high-temperature metal liquid is poured into the ceramic casting; after being cooled, the ceramic casting is mechanically destroyed to obtain the precision casting. The method requires no manufacturing of metal dies, uses the ceramic casting prototyping which has high efficiency, good precision and short production period, and is especially suitable for the quick manufacture of middle and small batches and the trial-manufacture of new products in the precision castings with complex shapes.

The invention discloses a high-speed rotation testing machine and a method for testing the high-speed rotation strength performance of a rotor. The high-speed rotation testing machine comprises a test cavity, a rotor system which is accommodated in the test cavity and used for testing the test rotor, a driving system that drives the rotor system and a rotating speed control system that controls the rotating speed of the rotor system, wherein the driving system includes a driving motor and a speeder which is connected with the driving motor and drives the rotor system to rotate at a high speed, the rotor system includes a test rotor fixed part, a main shaft connected with the test rotor fixed part and driven to rotate by the speeder, and a damper which is sleeved outside the main shaft and supports the main shaft, the test cavity is equipped with a vacuumizing opening, a plurality of layers of containing rings is arranged in the test cavity and surround the rotor system, and the containing rings are connected through spacing blocks arranged at tail ends of the containing rings. The high-speed rotation testing machine uses a high-speed rotating rotor as a test object, the rotor is speeded up through the speeder system, the working condition of the rotor in high-speed rotation is simulated, and the performance requirement of high speed centrifugal load effect resistance of the rotor is tested.

The invention relates to an explosion-proof iron runner castable which comprises the following raw materials in percentage by weight: 55-80 percent of fusion tabular corundum, 10-30 percent of silicon carbide, 1-5 percent of soft clay, 2-5 percent of pure calcium aluminate cement, 1-7 percent of submicron powder, 0.5-1.5 percent of explosion-proof agent and 0.05-0.15 percent of water reducing agent, wherein the explosion-proof agent is a mixture of aluminum powder, aluminum lactate, explosion-proof fiber and boron carbide powder with the weight ratio of 1-2:2.5-4:1-2.5:2-4. The castable of the invention has no cracks after demoulding and drying and no spalling during baking, has the safe explosion-proof temperature of 800 DEG C increased from 500 DEG C, can be subjected to construction under heat state and rapid temperature rise without spalling and can meet the operating requirements of rapid construction of middle and small size blast furnace iron runner. The castable has long service life, can improve the environment of a casting house, greatly reduces the labor intensity of the workers, improves the quality of molten iron and enhances the application safety factor of the iron runner.

The invention relates to a toughened glass test examination apparatus, and concretely relates to a disk wheel rotating bench rack shooting V-shaped clamping plate nickel alloy glass examination apparatus. The apparatus is characterized in that a bench plate rotating shaft at one side is fixedly provided with a hand-operated disk wheel, a disk wheel flat key is arranged between the bench plate rotating shaft and the hand-operated disk wheel, and the outer side surface of the hand-operated disk wheel is provided with a disk wheel cranking handle; two transverse horizontal rods are in sliding fit with shooting transverse slide blocks, a shooting square bar is fixedly arranged between the two shooting transverse slide blocks, the shooting square bar is provided with a mobile camera assembly, an impact cross bar is fixedly provided with a cylinder impacter in a slidable manner, the upper plane of a test bench plate is fixedly provided with a coplanar V-shaped groove clamping plate assembly, and a broken glass recovery container is fixedly arranged between an entirety of bench plate bearers and lock pin bearers and the upper plane of a supporting side plate; and an integral frame is provided with a rack elevating industry camera, a disk wheel overturns test bench plates, a screw thread lock pin is arranged to fasten, and especially the coplanar V-shaped groove clamping plate assembly and the cylinder impacter are also arranged to form an automatic whole-course detection base apparatus.

The invention relates to a method for preparing tungsten carbide abrasion resistant composite coating by a penetration brazing method, belonging to the field of coating preparation in materials processing engineering. The invention comprises the following steps: (1) pasting coating metal powder cloth containing tungsten carbide-cobalt (WC-Co), nickle (Ni) and chromium (Cr) mixed powder on a metalsubstrate by using epoxy resin bonding agent; (2) preparing welding material metal powder cloth from BNi-2 brazing material and pasting the welding material metal powder cloth on the coating metal powder cloth obtained in the step (1); and (3) carrying out penetration brazing in a vacuum furnace to form a metallurgical bonded interface. The tungsten carbide abrasion resistant composite coating canbe applicable to protection of mechanical elements in the field of generating plant, petroleum, aviation, food, plastics and the like.

An immersion bag system for use with an ultrasound probe to overcome near field artifact includes a flexible thin wall thickness immersion bag with an attached flexible collar having an integral internal seal. The immersion bag contains a gel or other ultrasound transmission medium and is sealingly and removably attached to the tip end of an ultrasound probe by use of the flexible collar having the integral internal seal. The immersion bag is able to conform to a cornea as well as to other surfaces whether flat or irregular, thereby enabling an ultrasound probe to be used easily on such surfaces. An ultrasound probe in use with the immersion bag system is maintained at a distance above the contact surface of the immersion bag and is positionable about the vertical axis while the immersion bag maintains stationary conformal contact with the structure against which it is in contact.

The invention relates to an anti-explosion shower head. The problem of burst of shower heads caused by the facts that water spraying holes become small or are blocked or water pressure rises abnormally is solved. According to the technical scheme, an anti-explosion valve is positioned in a shower head disc. The anti-explosion valve can be automatically opened or closed along with the changes of water pressure in the shower head, so as to achieve the effect of adjusting the water pressure in the shower head. The anti-explosion shower head can avoid users' personal injury caused by shower head burst caused by too high water pressure in the shower head.

The invention provides a bread making method. A bread machine is used for making bread, the bread machine consists of a bread bucket and an oven bucket, a steam device is arranged between the bread bucket and the oven bucket, and the steam device is used for generating steam under the heating action of a heating element arranged on the inner side wall of the oven bucket. The making method comprises the following steps: firstly, putting bread raw materials in the bread bucket, and forming a bread dough under the stirring action of a stirring piece, wherein the stirring time is 20 to 40 min; secondly, controlling the temperature inside the bread machine to be 28 to 35 DEG C, and fermenting the bread blanks for 50 to 90 min; thirdly, controlling the temperature inside the bread machine to be 50 to 80 DEG C and the relative humidity to be 80% to 90%, and finally fermenting the fermented bread dough for 20 to 30 min; fourthly, controlling the temperature inside the bread machine to be 110 to 140 DEG C, and carrying out high-temperature baking on the bread dough after final fermentation to make the bread. The bread making method provided by the invention solves the technical problem that bread skins of the bread made by an existing bread making method are relatively thick as well as brown and crisp.

The invention relates to a plastic bag suitable for crushing and dispensing an object, such as medicinal pill. The bag has an open end, is strong enough to withstand crushing forces, and includes a bottom seal that forms an angle of greater than 90° with the sides of the bag. For example, the bottom seal may be curved and concave toward the open end of the bag. The bag may also include a lip near the opening and formed by one of the bag walls. The bag may also include a gripper on any of (1) the interior or exterior surfaces of the lip or (2) the interior or exterior surface of the other wall. The bag may also include an indicator mark, e.g., a colored line near the opening to serve as a visual and/or tactile indicator for the user of the bag.

A secondary battery has a safety vent which has an asymmetric structure and provides a substantial opening for the battery, instead of having a local crack, to rapid vent to atmosphere in order to prevent the secondary battery from bursting when the internal pressure of a battery increases excessively or external impact is applied thereto.

The secondary battery includes an electrode assembly charging/discharging functions, a can housing the electrode assembly, a cap assembly that includes a cap plate closing up an open part of the can, and a safety vent having an asymmetric track shape that is provided in the cap plate of the cap assembly.

The invention discloses a simple method for manufacturing a ceramic-metal composite wear-resistant part. The simple method for manufacturing the ceramic-metal composite wear-resistant part is characterized by comprising the following steps of obtaining a steel wire gauze, stamping a groove in the steel wire gauze, filling ceramic particles in the groove after surface wetting treatment is conducted on the ceramic particles, taking another steel wire gauze to cover the first steel wire gauze so that the groove can be shielded and scattering of the ceramic particles can be avoided, fixing the steel wire gauze with the ceramic particles fixed on a corresponding position, need to be enhanced, of the mold cavity wear-resistant part, and pouring and casting matrix metal liquid to obtain the wear-resistant part. The simple method for manufacturing the ceramic-metal composite wear-resistant part has the advantages of being even in distribution of the ceramic particles, firm in combination with matrix metal, capable of giving full play to the characteristics of ceramic and metal and achieving high-resistant performance and high-impact-resistant performance, simple, easy and convenient to operate, capable of being produced in large scale or in batch, and low in cost.