Abstract: A dual-core self-centering buckling-restrained brace includes a core unit, a restraining unit clamping the core unit therein, a middle sleeve disposed around the an energy dissipating section of the core unit and the restraining unit and having an end welded to one end of the core unit, an outer sleeve disposed around the middle sleeve and having an end welded to the other end of the core unit, two inner plates disposed respectively at two ends of the restraining unit, two outer plates disposed respectively at two ends of each of the middle sleeve and said outer sleeve, at least one first tensing member connecting the first inner plate to the second outer plate, and at least one second tensioning element connecting the first outer plate to the second inner plate.

Abstract: A fan frame structure includes a plastic frame and a metal fixing frame, in which at least two support arms are disposed on the rim of the fixing frame and extended outwardly therefrom, the outwardly extended distance of each support arm shall be beyond the range of an accommodation space of the frame, the portion of the support arm beyond the accommodation space in integrally enclosed by the plastic material of the frame.

Abstract: The present invention relates to a fan frame structure including a plastic frame and a metal fixing frame, in which at least two support arms are disposed on the rim of the fixing frame and extended outwardly therefrom, the outwardly extended distance of each support arm shall be beyond the range of an accommodation space of the frame, the portion of the support arm beyond the accommodation space in integrally enclosed by the plastic material of the frame. Therefore, the present invention not only significantly lowers the material cost, but also produces a variety of products in coordination with various specifications of fixing frame by using a single injection mold for the frame to save the mold cost.

Abstract: The present invention provides a method for manufacturing ethylene-vinyl alcohol copolymer pellets, which comprises passing a solution of ethylene-vinyl alcohol copolymer through a die plate of an extruder and cutting into pellets while cooling the ethylene-vinyl alcohol copolymer pellets by a coagulating fluid under flowing, and then charging into a solid-liquid separating device to separate the ethylene-vinyl alcohol copolymer pellet. According to the method of the present invention, it can produce pellets continuously in a stable manner and ethylene-vinyl alcohol copolymer pellets having uniform size and shape can be obtained.

Abstract: The present invention relates to a method for increasing the heat-resistant of ethylene-vinyl alcohol copolymer (EVOH), the method is characterized by using a mixture of acetic acid, magnesium dihydrogen phosphate, and potassium dihydrogen phosphate at a certain ratio as an acid-treating solution in the acid-treating procedure of a process for preparing EVOH. The EVOH produced by the method of the present invention exhibits an excellent heat-resistance and does not become yellowing attributed to the elevated processing temperature. Also, the EVOH generated by the method of the present invention exhibits a uniform heat-resistance since the additives are dispersed evenly in the EVOH.

Abstract: A process for continuously preparing ethylene-vinyl acetate (EVAc) copolymer, by subjecting ethylene and vinyl acetate to a solution polymerization by introducing the gaseous phase of the polymerization reaction into an impurity scrubbing column and washing the gas phase with a solvent used in the reaction, then recycling it into the reaction system, thereby impurity generated in the reaction will be removed. A reactive system having a reaction tank for co-polymerizing ethylene with vinyl acetate, an ethylene recovering tower connected with the bottom of the reaction tank, a line connecting with the bottom of the recovering tower for recovering ethylene-vinyl acetate copolymer; and an impurity scrubbing column connecting with the top of the reaction tank for removing impurity generated in the polymerization reaction.

Abstract: A reversible inflation system allowing a single pump to be used both for inflation and deflation of the air bladder. This embodiment of the inflation system includes a pump with an inlet and an outlet ports and a pump housing having two filling and venting valves. The pump is movably mounted in the pump housing so that the pump can move axially between two locations in the pump housing. In one of the locations, the pump ports align with the housing valves to create an air path that inflates the bladder. In the other location, the pump ports align with the housing valves to create an air path that deflates the bladder.