Patents by Inventor Ryo Igarashi

Ryo Igarashi 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: 20100001572
    Abstract: A backrest device for a chair, capable of, without a reduction in its strength and rigidity, effectively bending backward so as to follow the shape of the back of a person seated on the chair, providing the person with excellent sitting comfort. In the backrest device, a back board is supported by a backrest frame, and the back board has a flexible back stopper on the inner side of a back frame. The thickness of a vertical intermediate section of the back stopper is gradually increased from both left and right sections of the intermediate section toward the center such that the thickness is less in both left and right sections and is maximum at the center.
    Type: Application
    Filed: November 9, 2007
    Publication date: January 7, 2010
    Inventors: Hiroshi Masunaga, Ryo Igarashi, Yoichiro Oda
  • Publication number: 20090127914
    Abstract: A backrest device for a chair, in which a backboard is easily flexible without a reduction in its strength, thus making the chair comfortable to sit on. The lower ends of both right and left sides of the back frame are supported at both sides at the back of a leg body, and the flexible back board is formed on the inside of rear frames. A large number of openings are formed in the backboard so as to be close to each other in the top-bottom and left-right directions. Between openings adjacent to each other in the left-right direction, there is formed a connection section continuing in the top-bottom direction, and the dimension in the front-back direction of the connection section is made larger than the dimension in the left-right direction of the connection section.
    Type: Application
    Filed: November 2, 2006
    Publication date: May 21, 2009
    Inventors: Ryo Igarashi, Hiroaki Tsukiji, Hiroshi Masunaga
  • Publication number: 20080284229
    Abstract: A stretching structure of a stretching material in a chair in which the ratio of the rear frame of a backrest to the outline of the chair is small, design is smart, weight is reduced, the number of parts is reduced, and assemblability is improved and the backrest of the chair. In the chair having the backrest formed by stretching the stretching material on the front surface of the rear frame, the rear frame comprises a front frame to which the peripheral edge part of the stretching material is fixed and an upper reinforcement frame rod. The laterally facing upper reinforcement frame rod is connected at its both ends to both ends of the laterally facing upper frame rod at the top of the front frame with the center part of the upper reinforcement frame rod separated backward from the upper frame rod.
    Type: Application
    Filed: October 12, 2005
    Publication date: November 20, 2008
    Inventors: Hiroshi Masunaga, Tetsuya Narita, Ryo Igarashi, Akira Kiyoku, Ken Nakayama
  • Patent number: 7246859
    Abstract: A chair has a backrest and a pair of armrests. A pair of support struts for supporting the backrest is connected to a shaft of a base under a seat. The armrest is supported by an arm post. An operating lever is mounted on the upper front end of the arm post. When the backrest is tilted, it is held at a desired angle by pressing up the operating lever.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: July 24, 2007
    Assignee: Okamura Corporation
    Inventors: Ryo Igarashi, Naoki Numa, Ken Nakayama, Hiroshi Masunaga
  • Patent number: 7243993
    Abstract: A chair has a backrest and a pair of armrests. A pair of support struts for supporting the backrest is connected to a shaft of a base under a seat. The armrest is supported by an arm post. An operating lever is mounted on the upper front end of the arm post. When the backrest is tilted, it is held at a desired angle by pressing up the operating lever.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: July 17, 2007
    Assignee: Okamura Corporation
    Inventors: Ryo Igarashi, Naoki Numa, Ken Nakayama, Hiroshi Masunaga
  • Patent number: D550471
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: September 11, 2007
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D550977
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: September 18, 2007
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D555924
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: November 27, 2007
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D558995
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: January 8, 2008
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D558996
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: January 8, 2008
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D558997
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: January 8, 2008
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D559572
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: January 15, 2008
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D559573
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: January 15, 2008
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D559574
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: January 15, 2008
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D567521
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: April 29, 2008
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D567522
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: April 29, 2008
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D568057
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: May 6, 2008
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D575542
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: August 26, 2008
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D587027
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: February 24, 2009
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi
  • Patent number: D587915
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: March 10, 2009
    Assignee: Okamura Corporation
    Inventor: Ryo Igarashi