Patents by Inventor Takehiro Okanaka

Takehiro Okanaka 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).

  • Publication number: 20030075848
    Abstract: A fluid-filled elastic mount of suspension type, wherein a lower open-end of a cylindrical portion of a second mounting member is fluid-tightly closed by a first mounting member and a tapered elastic body interposed therebetween, extending from the lower open-end into the cylindrical portion. An upper open-end portion of the cylindrical portion is closed by a flexible layer for forming a fluid-filled chamber between the elastic body and the flexible layer and being divided by a partition member into a pressure-receiving chamber defined by the elastic body and an equilibrium chamber defined by the flexible layer, which are held in communication by an orifice passage An elastic restricting projection is bonded to the partition member to protrude and be located in an intermediate portion between the radially opposite elastic body and the cylindrical portion, for restricting an annular region of the intermediate portion.
    Type: Application
    Filed: September 27, 2002
    Publication date: April 24, 2003
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Takehiro Okanaka, Fumiaki Hashimoto
  • Patent number: 6390458
    Abstract: A fluid-filled elastic mount including an elastic body elastically connecting a first mounting member and a cylindrical second mounting members for fluid-tightly closing one open end of the second mounting member, a partition and a closure members superposed on each other and fixed at their peripheral portions to the other open end of the second mounting member, by calking, to provide on one side of the partition member a pressure receiving chamber partially defined by the elastic body and on the other side of the partition member an equilibrium chamber partially defined by a flexible diaphragm fixed to the closure member. These chambers are filled with a non-compressible fluid. The partition member has a cylindrical positioning shoulder, while the closure member has a cylindrical wall portion which is press-fitted onto the positioning shoulder of the partition member, so that the partition and closure member are positioned relative to each other in their diametric direction.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: May 21, 2002
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Takehiro Okanaka, Hiroaki Tanahashi
  • Publication number: 20010019099
    Abstract: A fluid-filled elastic mount including an elastic body elastically connecting a first mounting member and a cylindrical second mounting members for fluid-tightly closing one open end of the second mounting member, a partition and a closure members superposed on each other and fixed at their peripheral portions to the other open end of the second mounting member, by calking, to provide on one side of the partition member a pressure receiving chamber partially defined by the elastic body and on the other side of the partition member an equilibrium chamber partially defined by a flexible diaphragm fixed to the closure member. These chambers are filled with a non-compressible fluid. The partition member has a cylindrical positioning shoulder, while the closure member has a cylindrical wall portion which is press-fitted onto the positioning shoulder of the partition member, so that the partition and closure member are positioned relative to each other in their diametric direction.
    Type: Application
    Filed: February 9, 2001
    Publication date: September 6, 2001
    Inventors: Takehiro Okanaka, Hiroaki Tanahashi
  • Patent number: 6036182
    Abstract: A fluid-filled cylindrical vibration damping device comprising: an inner sleeve; an outer sleeve disposed radially outwardly of the inner sleeve; an elastic body interposed between the inner and outer sleeves; a pressure-receiving chamber partially defined by the elastic body; a first flexible diaphragm partially defines a first equilibrium chamber; a second flexible diaphragm partially defines a second equilibrium chamber; a first orifice passage which permits fluid communication between the pressure-receiving and first equilibrium chambers; for defining a second orifice passage which permits fluid communication between the first and second equilibrium chambers; the second orifice passage having a ratio A/L which is smaller than that of the first orifice passage, wherein A and L are a cross sectional area and a length of each orifice passage, respectively, and wherein the fluid flowing in the first orifice passage has a first resonance frequency f1 while the fluid flowing in the second orifice passage has a
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: March 14, 2000
    Assignee: Tokai Rubber Industries, Ltd.
    Inventor: Takehiro Okanaka