Patents by Inventor Takanao Shirai

Takanao Shirai 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: 6511082
    Abstract: A stock cart including a dolly frame configured to be nested with each other and including a connecting member and two end members, the connecting member connecting the two end members to form an H configuration, a plurality of free casters provided on the two end members, at least one stationary caster provided on a bottom surface of a substantially intermediate portion of the connecting member of the dolly frame, the at least one stationary caster being configured to form an imaginary plane in contact with ground with ones of the free casters on each one of the two end members pivotally, wherein one of the two end members is configured to extend respective ones of the free casters thereon downwardly such that the respective ones of the free casters form the imaginary plane with ones of the free casters on the other one of the two members.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: January 28, 2003
    Assignee: Kawajun Co., Ltd.
    Inventor: Takanao Shirai
  • Publication number: 20020079660
    Abstract: A stock cart including a dolly frame configured to be nested with each other and including a connecting member and two end members, the connecting member connecting the two end members to form an H configuration, a plurality of free casters provided on the two end members, at least one stationary caster provided on a bottom surface of a substantially intermediate portion of the connecting member of the dolly frame, the at least one stationary caster being configured to form an imaginary plane in contact with ground with ones of the free casters on each one of the two end members pivotally, wherein one of the two end members is configured to extend respective ones of the free casters thereon downwardly such that the respective ones of the free casters form the imaginary plane with ones of the free casters on the other one of the two members.
    Type: Application
    Filed: February 11, 2002
    Publication date: June 27, 2002
    Applicant: KAWAJUN CO., LTD.
    Inventor: Takanao Shirai
  • Patent number: 6394470
    Abstract: In a six-wheel stock cart 10 including a dolly frame 1 having a nesting construction, free casters 2 attached to bottom surfaces of the dolly frame 1 that are near four corners of the dolly frame, a pair of stationary casters 3 attached to a bottom surface of a substantially intermediate portion of the dolly frame, and a dolly plate 4 pivotably attached to a site that is near a rearward end portion of the dolly frame, the stock cart is nested based on operation of the four free casters 2 after a plane defined by lower ends of the stationary casters 3 is positioned above a plane defined by lower ends of the four free casters by pivoting the dolly plate 4 upward. Therefore, the stock cart can be freely nested in a direction of a shorter dimension of the stock cart.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: May 28, 2002
    Assignee: Kawajun Co. Ltd.
    Inventor: Takanao Shirai