Patents by Inventor Youichi Kumano

Youichi Kumano 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: 10717481
    Abstract: The elastic crawler (1) according to this disclosure comprises: an endless belt-like main body (2) having elasticity; a plurality of cores (3) embedded in a circumferential direction of the main body (2); a plurality of lugs (5) each being arranged in a manner protruding from an outer circumferential surface of the main body (2) and extending between the plurality of cores (3) adjacent in the circumferential direction of the main body (2); and an inner circumferential concavity (G1) formed at a position on an inner circumferential surface of the main body (2) overlapping, in a thickness direction of the main body (2), an outer circumferential concavity (G2) of each of the lugs (5). The elastic crawler device comprises: the elastic crawler (1); and a drive wheel, an idle wheel and a rolling wheel.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: July 21, 2020
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Youichi Kumano
  • Patent number: 10435090
    Abstract: Provided is an elastic crawler with improved transmission of the driving force to snow, soft ground, etc. by improving the packing performance during running of the elastic crawler. The elastic crawler 1 comprises: a crawler main body 2 formed into an endless shape with an elastic body; a plurality of cores 3 being embedded in the crawler main body 2 in a manner spaced from each other in the crawler circumferential direction and extending in a crawler width direction; and a plurality of lugs 4, 5 raised from an outer circumferential surface of the crawler main body 2 and respectively surrounding predetermined regions R overlapping the cores 3 in a crawler thicknesswise view.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: October 8, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Youichi Kumano
  • Publication number: 20180201334
    Abstract: Provided is an elastic crawler with improved transmission of the driving force to snow, soft ground, etc. by improving the packing performance during running of the elastic crawler. The elastic crawler 1 comprises: a crawler main body 2 formed into an endless shape with an elastic body; a plurality of cores 3 being embedded in the crawler main body 2 in a manner spaced from each other in the crawler circumferential direction and extending in a crawler width direction; and a plurality of lugs 4, 5 raised from an outer circumferential surface of the crawler main body 2 and respectively surrounding predetermined regions R overlapping the cores 3 in a crawler thicknesswise view.
    Type: Application
    Filed: July 28, 2016
    Publication date: July 19, 2018
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Youichi KUMANO
  • Publication number: 20180148112
    Abstract: The elastic crawler (1) according to this disclosure comprises: an endless belt-like main body (2) having elasticity; a plurality of cores (3) embedded in a circumferential direction of the main body (2); a plurality of lugs (5) each being arranged in a manner protruding from an outer circumferential surface of the main body (2) and extending between the plurality of cores (3) adjacent in the circumferential direction of the main body (2); and an inner circumferential concavity (G1) formed at a position on an inner circumferential surface of the main body (2) overlapping, in a thickness direction of the main body (2), an outer circumferential concavity (G2) of each of the lugs (5). The elastic crawler device comprises: the elastic crawler (1); and a drive wheel, an idle wheel and a rolling wheel.
    Type: Application
    Filed: April 20, 2016
    Publication date: May 31, 2018
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Youichi KUMANO
  • Patent number: 6039405
    Abstract: A segment structure mounted on a wheel or an endless rubber track for increasing the driving force of off-road vehicles, civil engineering machines or construction machines is disclosed. A segment of a rubber elastic material mounted on the outer periphery of the wheels or the endless rubber track includes a bottom section adapted to be in contact with the wheel or the endless rubber track, a hollow section formed in the segment along the width of the wheel or the endless rubber track, and a stopper erected into the hollow section from the bottom section. The inner surface of the hollow section and the stopper are kept out of contact with each other under a static load.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: March 21, 2000
    Assignee: Bridgestone Corporation
    Inventors: Tomoyuki Kurata, Youichi Kumano, Kazuya Takahashi
  • Patent number: 5902017
    Abstract: A segment structure mounted on a wheel or an endless rubber track for increasing the driving force of off-road vehicles, civil engineering machines or construction machines is disclosed. A segment of a rubber elastic material mounted on the outer periphery of the wheels or the endless rubber track includes a bottom section adapted to be in contact with the wheel or the endless rubber track, a hollow section formed in the segment along the width of the wheel or the endless rubber track, and a stopper erected into the hollow section from the bottom section. The inner surface of the hollow section and the stopper are kept out of contact with each other under a static load.
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: May 11, 1999
    Assignee: Bridgestone Corporation
    Inventors: Tomoyuki Kurata, Youichi Kumano, Kazuya Takahashi