Patents by Inventor Akiyuki Harada

Akiyuki Harada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pressing method, pressing mechanism and resin molding device
    Patent number: 6851355
    Abstract: The pressing method includes the first step of displacing a sub-piston provided within a sub-cylinder from its initial position to press working fluid such that the working fluid is introduced via a check valve into a main cylinder to displace a main piston provided therein, and the second step of causing the sub-piston to return to the initial position such that the working fluid is supplied to the sub-cylinder. The first and second steps are repeated successively until the working fluid in the main cylinder attains a prescribed pressure level. With this method, variation in the way of pressing an object is alleviated, contamination due to the working fluid is prevented, and downsizing of the pressing mechanism is enabled.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: February 8, 2005
    Assignee: Towa Corporation
    Inventors: Akiyuki Harada, Masataka Takehara
  • Pressing method, pressing mechanism and resin molding device
    Publication number: 20020023535
    Abstract: The pressing method includes the first step of displacing a sub-piston provided within a sub-cylinder from its initial position to press working fluid such that the working fluid is introduced via a check valve into a main cylinder to displace a main piston provided therein, and the second step of causing the sub-piston to return to the initial position such that the working fluid is supplied to the sub-cylinder. The first and second steps are repeated successively until the working fluid in the main cylinder attains a prescribed pressure level. With this method, variation in the way of pressing an object is alleviated, contamination due to the working fluid is prevented, and downsizing of the pressing mechanism is enabled.
    Type: Application
    Filed: August 13, 2001
    Publication date: February 28, 2002
    Inventors: Akiyuki Harada, Masataka Takehara