Patents by Inventor Koichi Yuhara

Koichi Yuhara 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).

  • Fluid coupling
    Patent number: 9145990
    Abstract: A fluid coupling reliably finding absence of the gasket, if exists, in the leak test is provided. Butted end surfaces of coupling members have annular sealing protrusions and anti-overfastening annular protrusions protruded further than the annular sealing protrusions, respectively. At least one of the anti-overfastening annular protrusions has a communication path communicating internal space with external space when both the anti-overfastening annular protrusions butt against each other.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: September 29, 2015
    Assignee: FUJIKIN INCORPORATED
    Inventors: Koichi Yuhara, Izuru Shikata
  • FLUID COUPLING
    Publication number: 20130154253
    Abstract: A fluid coupling capable of reliably finding absence of the gasket, if exists, in the leak test is provided. Butted end surfaces of coupling members 1, 2 have annular sealing protrusions 7, 8 and anti-overfastening annular protrusions 9, 10 protruded further than the annular sealing protrusions 7, 8, respectively. At least one of the anti-overfastening annular protrusions 9, 10 has a communication path 31 or 32 communicating internal space Si with external space So when both the anti-overfastening annular protrusions 9, 10 butt against each other.
    Type: Application
    Filed: June 13, 2011
    Publication date: June 20, 2013
    Applicant: FUJIKIN INCORPORATED
    Inventors: Koichi Yuhara, Izuru Shikata