Patents by Inventor Tetsuo MURAOKA

Tetsuo MURAOKA 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: 11686238
    Abstract: An exhaust device that guides exhaust gas from an exhaust pipe in front of an engine to a muffler in a rear of the engine is provided. The exhaust device includes a primary catalyst case accommodating a primary catalyst configured to purify the exhaust gas at a downstream side from the exhaust pipe, a secondary catalyst case accommodating a secondary catalyst configured to purify the exhaust gas at a downstream side from the primary catalyst, and a chamber formed with a muffling chamber configured to reduce an exhaust noise at a downstream side from the secondary catalyst. The primary catalyst case is disposed in a front space of the engine. The secondary catalyst case is disposed on a front part of a lower space of the engine. The chamber is disposed so as to occupy at least a rear part of the lower space of the engine.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: June 27, 2023
    Assignee: SUZUKI MOTOR CORPORATION
    Inventor: Tetsuo Muraoka
  • Patent number: 11555438
    Abstract: An exhaust device for guiding exhaust gas from an exhaust pipe in front of an engine to a muffler in a rear of the engine is provided. The exhaust device includes a catalyst case in which a catalyst configured to purify the exhaust gas that passes through the exhaust pipe is accommodated, and a chamber in which a muffling chamber configured to reduce an exhaust noise is formed downstream of the catalyst case. The catalyst case is disposed in a range from a front space with respect to the engine to a front part of a lower space of the engine. The chamber is disposed so as to occupy at least a rear part of the lower space of the engine.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: January 17, 2023
    Assignee: SUZUKI MOTOR CORPORATION
    Inventor: Tetsuo Muraoka
  • Publication number: 20220220883
    Abstract: An exhaust device that guides exhaust gas from an exhaust pipe in front of an engine to a muffler in a rear of the engine is provided. The exhaust device includes a primary catalyst case accommodating a primary catalyst configured to purify the exhaust gas at a downstream side from the exhaust pipe, a secondary catalyst case accommodating a secondary catalyst configured to purify the exhaust gas at a downstream side from the primary catalyst, and a chamber formed with a muffling chamber configured to reduce an exhaust noise at a downstream side from the secondary catalyst. The primary catalyst case is disposed in a front space of the engine. The secondary catalyst case is disposed on a front part of a lower space of the engine. The chamber is disposed so as to occupy at least a rear part of the lower space of the engine.
    Type: Application
    Filed: December 17, 2021
    Publication date: July 14, 2022
    Applicant: SUZUKI MOTOR CORPORATION
    Inventor: Tetsuo MURAOKA
  • Publication number: 20220220873
    Abstract: An exhaust device for guiding exhaust gas from an exhaust pipe in front of an engine to a muffler in a rear of the engine is provided. The exhaust device includes a catalyst case in which a catalyst configured to purify the exhaust gas that passes through the exhaust pipe is accommodated, and a chamber in which a muffling chamber configured to reduce an exhaust noise is formed downstream of the catalyst case. The catalyst case is disposed in a range from a front space with respect to the engine to a front part of a lower space of the engine. The chamber is disposed so as to occupy at least a rear part of the lower space of the engine.
    Type: Application
    Filed: December 15, 2021
    Publication date: July 14, 2022
    Applicant: SUZUKI MOTOR CORPORATION
    Inventor: Tetsuo MURAOKA
  • Patent number: 9981710
    Abstract: A shock absorber has an inner tube embedded in a steering stem shaft and an outer tube provided slidably. A front fork is fixed to a lower end of the outer tube, and the inner tube is fixed to an upper end of the steering stem shaft. The steering stem shaft is provided with a guide trench extending in a telescoping direction and having a long hole shape. A roller bearing is provided on an outer circumferential surface of the outer tube and is inserted into the guide trench movably along the guide trench. As a result, relative movement between the steering stem shaft and the outer tube in the telescoping direction is permitted while relative rotation is restricted.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: May 29, 2018
    Assignee: SUZUKI MOTOR CORPORATION
    Inventor: Tetsuo Muraoka
  • Publication number: 20170057588
    Abstract: A shock absorber has an inner tube embedded in a steering stem shaft and an outer tube provided slidably. A front fork is fixed to a lower end of the outer tube, and the inner tube is fixed to an upper end of the steering stem shaft. The steering stem shaft is provided with a guide trench extending in a telescoping direction and having a long hole shape. A roller bearing is provided on an outer circumferential surface of the outer tube and is inserted into the guide trench movably along the guide trench. As a result, relative movement between the steering stem shaft and the outer tube in the telescoping direction is permitted while relative rotation is restricted.
    Type: Application
    Filed: August 19, 2016
    Publication date: March 2, 2017
    Applicant: SUZUKI MOTOR CORPORATION
    Inventor: Tetsuo MURAOKA