Patents by Inventor Mahito Arai

Mahito Arai 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: 20200317001
    Abstract: A tire comprises a tread portion comprising three main grooves and four land portions. The main grooves are a first shoulder main groove, a second shoulder main groove and a crown main groove. The land portions include a first middle land portion between the first shoulder main groove and the crown main groove, a second middle land portion between the second shoulder main groove and the crown main groove. The first middle land portion is disposed so that the tire equator is positioned in the ground contact surface thereof. Each of the first middle land portion and the second middle land portion is provided with a plurality of narrow grooves so as to exhibit excellent steering stability and ride comfort.
    Type: Application
    Filed: April 2, 2020
    Publication date: October 8, 2020
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Mahito ARAI, Masayuki FUJITA, Suxiang YUAN
  • Patent number: 10780743
    Abstract: A tire comprises a tread portion 2. The tread portion 2 comprises two crown land regions 6 and two shoulder land regions 7 divided by a crown main groove 3 and a pair of shoulder main grooves 4 and 5 arranged one by one on each side of the crown main groove 3. Each of the two crown land regions 6 is provided with a plurality of sipes 15 each having a width less than 1.5 mm. The sipes 15 of each of the two crown land regions 6 include only semi-open sipes 18 each having one end connected with one of the main grooves and the other end terminating within the land region. The sipes 15 of the two crown land regions 6 are inclined in a same direction with respect to a tire axial direction.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: September 22, 2020
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Rena Onitsuka, Isao Sawakami, Mahito Arai
  • Publication number: 20190160879
    Abstract: A tire comprises a tread portion whose position when mounted on a vehicle is specified. The tread portion includes an inner crown land region defined between a crown main groove and an inner shoulder main groove. The inner crown land region includes crown lateral grooves, first inner crown sipes, second inner crown sipes each extending from the inner shoulder main groove toward the crown main groove and having an inner end terminating within the inner crown land region, and third inner crown sipes each extending from the crown main groove toward the inner shoulder main groove and having an outer end terminating within the inner crown land region. The crown lateral grooves each have a length in a tire axial direction larger than that of each of the second inner crown sipes.
    Type: Application
    Filed: November 9, 2018
    Publication date: May 30, 2019
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Mahito ARAI, Masashi WAKASUGI, Hiroki OMURA
  • Publication number: 20180264887
    Abstract: A tire comprises a tread portion 2. The tread portion 2 comprises two crown land regions 6 and two shoulder land regions 7 divided by a crown main groove 3 and a pair of shoulder main grooves 4 and 5 arranged one by one on each side of the crown main groove 3. Each of the two crown land regions 6 is provided with a plurality of sipes 15 each having a width less than 1.5 mm. The sipes 15 of each of the two crown land regions 6 include only semi-open sipes 18 each having one end connected with one of the main grooves and the other end terminating within the land region. The sipes 15 of the two crown land regions 6 are inclined in a same direction with respect to a tire axial direction.
    Type: Application
    Filed: February 22, 2018
    Publication date: September 20, 2018
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Rena ONITSUKA, Isao SAWAKAMI, Mahito ARAI
  • Patent number: 6180050
    Abstract: The purpose of the invention is to provide a solid model creation apparatus that is small in size and inexpensive. A multiplicity of blue LEDs are prepared, optical fibers are connected thereto, and GRIN lenses are arranged at the ends of the tips of the respective optical fibers to constitute an exposing head 23. The exposing head 23 forms images of the end faces of the respective optical fibers in a photocurable resin exposure region 24 as light spots 55. The diameter of a light spot 55 is, for example, 0.5 mm, but the size of a pixel 71 within the exposure region 24 is much smaller; for example, 62.5&mgr;. The multiplicity of optical fibers at the exposing head 23 are arrayed in a matrix such that they are displaced in staggered fashion so that respective light spots 55 are lined up at the pitch 62.5&mgr; of the pixels 71 in the primary scan (Y-axis) direction.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: January 30, 2001
    Assignees: The Institute of Physical and Chemical Research, NTT Data Corporation
    Inventors: Mahito Arai, Toshiki Niino, Takeo Nakagawa