TOPURA CO., LTD.
|TOPURA CO., LTD. Patent applications|
|Patent application number||Title||Published|
|20130230366||METHOD FOR MANUFACTURING ALUMINUM BASED ALLOY-MADE FASTENING PART AND ALUMINUM BASED ALLOY-MADE FASTENING PART - By changing the timing of applying a heat treatment, a high-strength aluminum based alloy-made fastening part having an unprecedented tensile strength or other strength property and a method for manufacturing of the same are provided. The method is characterized in that an aluminum based alloy-made material is subjected to a solution treatment and is then age-hardened; work hardening is further applied to a shaft portion by drawing thereof in a heading process; and the shaft portion is thereafter subjected to a process of rolling male threads.||09-05-2013|
|20100034615||COATING AGENT FOR TAPPING SCREW, METHOD FOR PREPARING THE COATING AGENT, METHOD FOR FORMING COATING LAYER ON THE PERIPHERY OF TAPPING SCREW USING THE COATING AGENT, AND TAPPING SCREW HAVING COATING LAYER FORMED FROM THE COATING AGENT - Provided are a coating agent capable of forming, on the periphery of a tapping screw, a coating layer which can hold female-thread-forming chips generated during screwing of the tapping screw into a prepared hole of a workpiece, thereby preventing scattering of the female-thread-forming chips; and a tapping screw having thereon a coating layer formed from the coating agent.||02-11-2010|
|20090053008||TAPPING SCREW - It is possible to prevent a screwing torque from becoming excessively high even when a screw is threadedly engaged into a deep guide hole. In a tapping screw||02-26-2009|