Patents by Inventor Naoki SOGAWA

Naoki SOGAWA 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).

  • Patent number: 10989265
    Abstract: A vibration damping device of an inverted structure includes a cylinder, a rod capable of protruding and retracting in the cylinder, an outer cylinder coupled to the rod and inserted over the outer periphery of the cylinder, and a bush slidably inserted between the outer cylinder and the cylinder. A gap between the outer cylinder and the cylinder is filled with lubricating oil. The bush contains polytetrafluoroethylene and perfluoro alkoxy alkane. The lubricating oil contains an organic molybdenum additive.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: April 27, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Naoki Sogawa, Kentaro Komori, Gakuyo Fujimoto
  • Publication number: 20210108701
    Abstract: A vibration damping device for a vehicle includes: a first attachment member attached to a first member; a second attachment member attached to a second member; a first liquid chamber and a second liquid chamber configured to change volumes according to relative displacement between the first attachment member and the second attachment member; and an orifice passage configured to cause a liquid to flow between the first liquid chamber and the second liquid chamber according to changes in the volumes of the first liquid chamber and the second liquid chamber. The liquid contains a non-Newtonian fluid whose viscosity decreases as a shear rate increases, the orifice passage includes a first communication port communicating with the first liquid chamber and a second communication port communicating with the second liquid chamber, and an opening area of the first communication port is different from an opening area of the second communication port.
    Type: Application
    Filed: October 7, 2020
    Publication date: April 15, 2021
    Inventors: Keita TAKAESU, Seiji HAYAKAWA, Naoki SOGAWA
  • Publication number: 20210108700
    Abstract: A vibration damping device for a vehicle includes: a first attachment member attached to a first member; a second attachment member attached to a second member; a first liquid chamber and a second liquid chamber configured to change volumes according to relative displacement between the first attachment member and the second attachment member; and an orifice passage configured to cause a liquid to flow between the first liquid chamber and the second liquid chamber according to changes in the volumes of the first liquid chamber and the second liquid chamber. The orifice passage is curved at least partially in an axial direction thereof, and the liquid contains a non-Newtonian fluid whose viscosity decreases as a shear rate increases.
    Type: Application
    Filed: October 7, 2020
    Publication date: April 15, 2021
    Inventors: Keita TAKAESU, Seiji HAYAKAWA, Naoki SOGAWA
  • Patent number: 10865851
    Abstract: A damper device provided with a single cylinder type erecting structure having a free piston includes: a partition wall fixed to the cylinder between a piston and the free piston and partitioning inside of the cylinder into spaces in an axial direction of the cylinder; a partition wall orifice composed of an orifice piercing through the partition wall; a piston orifice composed of an orifice piercing through the piston; a partition wall-side flow variable structure configured to regulate a flow rate of a viscous fluid passing through the partition wall orifice; a piston-side flow variable structure configured to regulate a flow rate of the viscous fluid passing through the piston orifice; and a control unit configured to control the partition wall-side flow variable structure and the piston-side flow variable structure.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: December 15, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Naoki Sogawa, Kentaro Komori, Gakuyo Fujimoto
  • Publication number: 20200018375
    Abstract: A vibration damping device of an inverted structure includes a cylinder, a rod capable of protruding and retracting in the cylinder, an outer cylinder coupled to the rod and inserted over the outer periphery of the cylinder, and a bush slidably inserted between the outer cylinder and the cylinder. A gap between the outer cylinder and the cylinder is filled with lubricating oil. The bush contains polytetrafluoroethylene and perfluoro alkoxy alkane. The lubricating oil contains an organic molybdenum additive.
    Type: Application
    Filed: July 9, 2019
    Publication date: January 16, 2020
    Inventors: Naoki SOGAWA, Kentaro KOMORI, Gakuyo FUJIMOTO
  • Publication number: 20190242453
    Abstract: A damper device provided with a single cylinder type erecting structure having a free piston includes: a partition wall fixed to the cylinder between a piston and the free piston and partitioning inside of the cylinder into spaces in an axial direction of the cylinder; a partition wall orifice composed of an orifice piercing through the partition wall; a piston orifice composed of an orifice piercing through the piston; a partition wall-side flow variable structure configured to regulate a flow rate of a viscous fluid passing through the partition wall orifice; a piston-side flow variable structure configured to regulate a flow rate of the viscous fluid passing through the piston orifice; and a control unit configured to control the partition wall-side flow variable structure and the piston-side flow variable structure.
    Type: Application
    Filed: February 7, 2019
    Publication date: August 8, 2019
    Inventors: Naoki SOGAWA, Kentaro KOMORI, Gakuyo FUJIMOTO