Patents by Inventor Yasuharu Fukushima

Yasuharu Fukushima 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: 7407236
    Abstract: An elastic crawler having a crawler main body including an endless belt of rubber-like elastic material that is driven by friction with a friction drive wheel. A plurality of guide projections protrude from the inner circumferential surfaces of both lateral edge portions of the crawler main body at specified intervals in the longitudinal direction of the belt. Guide core bodies are embedded to the inside of the respective guide projections in the lateral direction of the belt. A plurality of main body core bodies are embedded in the crawler main body in the same positions as the guide projections in the longitudinal direction of the belt, and a plurality of laterally extending lugs protrude from the outer circumferential surface of the crawler main body at specified intervals in the longitudinal direction of the belt. The guide core bodies and main body core bodies are independent of each other.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: August 5, 2008
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventor: Yasuharu Fukushima
  • Publication number: 20050200200
    Abstract: In an elastic crawler having a crawler main body consisting of an endless belt form rubber-like elastic material that is driven by friction with a friction drive wheel, a plurality of guide projections which are formed to protrude from the inner circumferential surfaces of both end portions of the crawler main body in the lateral direction of the belt at specified intervals in the longitudinal direction of the belt, guide core bodies which are embedded to the inside of the respective guide projections in the lateral direction of the belt, a plurality of main body core bodies which are embedded in the crawler main body in the same positions as the guide projections in the longitudinal direction of the belt, and a plurality of lugs which are formed to protrude from the outer circumferential surface of the crawler main body at specified intervals in the longitudinal direction of the belt, and which are respectively extended in the lateral direction of the belt, the guide core body and main body core body are ind
    Type: Application
    Filed: February 14, 2005
    Publication date: September 15, 2005
    Inventor: Yasuharu Fukushima
  • Patent number: 6722746
    Abstract: In a resilient crawler of this invention, sufficient flexibility at the portion between the lugs is obtained and such problems as separation of rubber are prevented while improving riding comfort by reducing the difference in rigidity between the portion where the lug is formed and the portion between the lugs, and improving lateral rigidity to assure the tractive force. Therefore, a resilient crawler of the present invention comprises a crawler body formed of a resilient material in the shape of an endless belt and having a multiplicity of lugs projecting from the outer peripheral surface at intervals longitudinally along the crawler body; and a multiplicity of linear lateral reinforcing members disposed in the crawler body so as to extend laterally thereof and be arranged longitudinally therealong.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: April 20, 2004
    Assignee: Sumitomo Rubber Industries Ltd.
    Inventors: Teruyuki Katayama, Yasuharu Fukushima, Kenichi Sakai
  • Publication number: 20030111903
    Abstract: In a resilient crawler of this invention, sufficient flexibility at the portion between the lugs is obtained and such problems as separation of rubber are prevented while improving riding comfort by reducing the difference in rigidity between the portion where the lug is formed and the portion between the lugs, and improving lateral rigidity to assure the tractive force. Therefore, a resilient crawler of the present invention comprises a crawler body formed of a resilient material in the shape of an endless belt and having a multiplicity of lugs projecting from the outer peripheral surface at intervals longitudinally along the crawler body; and a multiplicity of linear lateral reinforcing members disposed in the crawler body so as to extend laterally thereof and be arranged longitudinally therealong.
    Type: Application
    Filed: February 3, 2003
    Publication date: June 19, 2003
    Applicant: The Ohtsu Tire & Rubber Co., Ltd.
    Inventors: Teruyuki Katayama, Yasuharu Fukushima, Kenichi Sakai
  • Patent number: 6536852
    Abstract: In a resilient crawler of this invention, sufficient flexibility at the portion between the lugs is obtained and such problems as separation of rubber are prevented while improving riding comfort by reducing the difference in rigidity between the portion where the lug is formed and the portion between the lugs, and improving lateral rigidity to assure the tractive force. Therefore, a resilient crawler of the present invention comprises a crawler body formed of a resilient material in the shape of an endless belt and having a multiplicity of lugs projecting from the outer peripheral surface at intervals longitudinally along the crawler body; and a multiplicity of linear lateral reinforcing members disposed in the crawler body so as to extend laterally thereof and be arranged longitudinally therealong.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: March 25, 2003
    Assignee: Ohtsu Tire & Rubber Co., Ltd.
    Inventors: Teruyuki Katayama, Yasuharu Fukushima, Kenichi Sakai
  • Publication number: 20020067074
    Abstract: In a resilient crawler of this invention, sufficient flexibility at the portion between the lugs is obtained and such problems as separation of rubber are prevented while improving riding comfort by reducing the difference in rigidity between the portion where the lug is formed and the portion between the lugs, and improving lateral rigidity to assure the tractive force. Therefore, a resilient crawler of the present invention comprises a crawler body formed of a resilient material in the shape of an endless belt and having a multiplicity of lugs projecting from the outer peripheral surface at intervals longitudinally along the crawler body; and a multiplicity of linear lateral reinforcing members disposed in the crawler body so as to extend laterally thereof and be arranged longitudinally therealong.
    Type: Application
    Filed: July 27, 2001
    Publication date: June 6, 2002
    Inventors: Teruyuki Katayama, Yasuharu Fukushima, Kenichi Sakai