Patents by Inventor MASATAKE YAMANAKA

MASATAKE YAMANAKA 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).

  • Seal assembling method of master cylinder and seal assembling apparatus
    Patent number: 9440319
    Abstract: A seal assembling method of a master cylinder for assembling a cup seal for sealing a piston slidably moving in a bottomed-tubular cylinder main body to a seal groove formed in the cylinder main body in an annular shape includes inserting the cup seal into the cylinder main body while inclining the cup seal with respect to an axial direction of the cylinder main body, and assembling the cup seal to the seal groove by moving the cup seal to the seal groove in a state that a position of a center cored bar tool for defining an insertion limit of the cup seal with respect to the cylinder main body is aligned with the seal groove.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: September 13, 2016
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masatake Yamanaka, Hideki Hosaka
  • SEAL ASSEMBLING METHOD OF MASTER CYLINDER AND SEAL ASSEMBLING APPARATUS
    Publication number: 20130047405
    Abstract: A seal assembling method of a master cylinder for assembling a cup seal for sealing a piston slidably moving in a bottomed-tubular cylinder main body to a seal groove formed in the cylinder main body in an annular shape includes inserting the cup seal into the cylinder main body while inclining the cup seal with respect to an axial direction of the cylinder main body, and assembling the cup seal to the seal groove by moving the cup seal to the seal groove in a state that a position of a center cored bar tool for defining an insertion limit of the cup seal with respect to the cylinder main body is aligned with the seal groove.
    Type: Application
    Filed: August 30, 2012
    Publication date: February 28, 2013
    Inventors: MASATAKE YAMANAKA, Hideki Hosaka