Patents by Inventor Minoru Tazawa

Minoru Tazawa 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).

  • Off-road truck suspended with rubber spring device
    Patent number: 8256795
    Abstract: A rubber spring device is formed by alternately laminating a plurality of layers of hard plates whose linear dimension W in a direction parallel to the longitudinal direction of each equalizer bar is shorter in plan view than a linear dimension H in a direction parallel to an axle direction, and rubber layers. The rubber spring device is disposed between an end portion of each equalizer bar and a center axle in an articulated dump truck, and is allowed to function as a suspension. Thus, even when the rubber spring device is deformed into an accordion shape, peak positions of an internal stress within each rubber layer can be dispersed and reduced, thereby preventing generation of cracks within each rubber layer.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: September 4, 2012
    Assignee: Komatsu Ltd.
    Inventors: Tomoyuki Moriyama, Minoru Tazawa
  • Off-Road Truck Suspended with Rubber Spring Device
    Publication number: 20120119464
    Abstract: A rubber spring device is formed by alternately laminating a plurality of layers of hard plates whose linear dimension W in a direction parallel to the longitudinal direction of each equalizer bar is shorter in plan view than a linear dimension H in a direction parallel to an axle direction, and rubber layers. The rubber spring device is disposed between an end portion of each equalizer bar and a center axle in an articulated dump truck, and is allowed to function as a suspension. Thus, even when the rubber spring device is deformed into an accordion shape, peak positions of an internal stress within each rubber layer can be dispersed and reduced, thereby preventing generation of cracks within each rubber layer.
    Type: Application
    Filed: May 23, 2011
    Publication date: May 17, 2012
    Applicant: KOMATSU LTD.
    Inventors: Tomoyuki Moriyama, Minoru Tazawa
  • Vehicle suspension
    Patent number: D660750
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: May 29, 2012
    Assignees: Komatsu Ltd., Bridgestone Corporation
    Inventors: Tomoyuki Moriyama, Minoru Tazawa, Masayoshi Kawada
  • Vehicle suspension
    Patent number: D677607
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: March 12, 2013
    Assignees: Komatsu Ltd., Bridgestone Corporation
    Inventors: Tomoyuki Moriyama, Minoru Tazawa, Masayoshi Kawada