Patents by Inventor Fukuji Nakano

Fukuji Nakano 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: 10174787
    Abstract: A motion guide apparatus ensures that a retaining portion retains a rolling element. A rolling element retainer having retaining portions that prevent a rolling element from falling out of a movable body, the retaining portions extending along a loaded rolling element rolling portion, is incorporated in the movable body of the motion guide apparatus. End plates are formed integrally with the retaining portions. Fall prevention portions to reduce the widths of openings between the retaining portions are provided to center parts of the retaining portions in a length direction thereof. The fall prevention portions are padding portions integrated with the retaining portions, the padding portions rising in such a manner as to reduce the widths of the openings, and/or projections integrated with the retaining portions, the projections touching the movable body in such a manner that the center parts of the retaining portions bend toward a track member.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: January 8, 2019
    Assignee: THK CO., LTD.
    Inventors: Junichi Sakai, Kaoru Hoshide, Shigeo Tomita, Yuki Nakamura, Nobuyuki Maki, Muten Iwamoto, Kazuya Horike, Kenji Narata, Katsunori Yamamura, Fukuji Nakano, Shigemi Nakamura, Yosuke Irie
  • Patent number: 10125813
    Abstract: A motion guide apparatus ensures that a retaining portion retains a rolling element. A rolling element retainer having retaining portions that prevent a rolling element from falling out of a movable body, the retaining portions extending along a loaded rolling element rolling portion, is incorporated in the movable body of the motion guide apparatus. End plates are formed integrally with the retaining portions. Fall prevention portions to reduce the widths of openings between the retaining portions are provided to center parts of the retaining portions in a length direction thereof. The fall prevention portions are padding portions integrated with the retaining portions, the padding portions rising in such a manner as to reduce the widths of the openings, and/or projections integrated with the retaining portions, the projections touching the movable body in such a manner that the center parts of the retaining portions bend toward a track member.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: November 13, 2018
    Assignee: THK CO., LTD.
    Inventors: Junichi Sakai, Kaoru Hoshide, Shigeo Tomita, Yuki Nakamura, Nobuyuki Maki, Muten Iwamoto, Kazuya Horike, Kenji Narata, Katsunori Yamamura, Fukuji Nakano, Shigemi Nakamura, Yosuke Irie
  • Publication number: 20180073558
    Abstract: A motion guide apparatus ensures that a retaining portion retains a rolling element. A rolling element retainer having retaining portions that prevent a rolling element from falling out of a movable body, the retaining portions extending along a loaded rolling element rolling portion, is incorporated in the movable body of the motion guide apparatus. End plates are formed integrally with the retaining portions. Fall prevention portions to reduce the widths of openings between the retaining portions are provided to center parts of the retaining portions in a length direction thereof. The fall prevention portions are padding portions integrated with the retaining portions, the padding portions rising in such a manner as to reduce the widths of the openings, and/or projections integrated with the retaining portions, the projections touching the movable body in such a manner that the center parts of the retaining portions bend toward a track member.
    Type: Application
    Filed: March 10, 2016
    Publication date: March 15, 2018
    Applicant: THK CO., LTD.
    Inventors: Junichi Sakai, Kaoru Hoshide, Shigeo Tomita, Yuki Nakamura, Nobuyuki Maki, Muten Iwamoto, Kazuya Horiike, Kenji Narata, Katsunori Yamamura, Fukuji Nakano, Shigemi Nakamura, Yosuke Irie
  • Patent number: 9863470
    Abstract: An object is to provide a motion guide apparatus that can facilitate an assembly operation. An end member (4a, 4b) including an inner peripheral side of a direction changing path (2c) is placed on an end surface in a movement direction of a moving member body (3). At least one of a pair of the end members (4a and 4b) includes an opening (21) linking to the inner peripheral side of the direction changing path (2c) to load rolling elements (42) into a circulation path. Opposing surfaces (18) of the pair of the end members (4a and 4b) to the moving member body (3) are formed in flat surfaces. The pair of the end members (4a and 4b) molded integrally with a holding portion (5) is incorporated into the moving member body (3) in a direction orthogonal to the movement direction of the moving member body (3). A lid member (7a, 7b) closes the opening (21) in the end member (4a, 4b).
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: January 9, 2018
    Assignee: THK CO., LTD.
    Inventors: Shigeo Tomita, Junichi Sakai, Nobuyuki Maki, Kaoru Hoshide, Katsunori Yamamura, Muten Iwamoto, Kazuya Horiike, Kenji Narata, Fukuji Nakano, Shigemi Nakamura, Yosuke Irie, Yuki Nakamura
  • Publication number: 20170146059
    Abstract: An object is to provide a motion guide apparatus that can facilitate an assembly operation. An end member (4a, 4b) including an inner peripheral side of a direction changing path (2c) is placed on an end surface in a movement direction of a moving member body (3). At least one of a pair of the end members (4a and 4b) includes an opening (21) linking to the inner peripheral side of the direction changing path (2c) to load rolling elements (42) into a circulation path. Opposing surfaces (18) of the pair of the end members (4a and 4b) to the moving member body (3) are formed in flat surfaces. The pair of the end members (4a and 4b) molded integrally with a holding portion (5) is incorporated into the moving member body (3) in a direction orthogonal to the movement direction of the moving member body (3). A lid member (7a, 7b) closes the opening (21) in the end member (4a, 4b).
    Type: Application
    Filed: March 30, 2015
    Publication date: May 25, 2017
    Applicant: THK CO., LTD.
    Inventors: Shigeo Tomita, Junichi Sakai, Nobuyuki Maki, Kaoru Hoshide, Katsunori Yamamura, Muten Iwamoto, Kazuya Horiike, Kenji Narata, Fukuji Nakano, Shigemi Nakamura, Yusuke Irie, Yuki Nakamura
  • Patent number: 9581194
    Abstract: Provided is a motion guide device in which a moving member is equipped with circulation path moldings. With the device, ease of assembly and moldability can be improved. A moving member is provided with circulation path moldings, which have: holding sections that extend along loaded rolling-element rolling sections; return path configuring sections that configure return paths; and a pair of direction-change path inner circumference configuring sections that configure the inner circumferences of a pair of direction-change paths. The circulation path moldings are provided with a first molding in which one direction-change path inner circumference configuring sections is integrally molded with the holding section and a second molding in which the other direction-change path inner circumference configuring section is integrally molded with the return path configuring section. The first molding and the second molding are separate bodies.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: February 28, 2017
    Assignee: THK CO., LTD.
    Inventors: Nobuyuki Maki, Fukuji Nakano, Shigemi Nakamura
  • Publication number: 20150362014
    Abstract: Provided is a motion guide device in which a moving member is equipped with circulation path moldings. With the device, ease of assembly and moldability can be improved. A moving member is provided with circulation path moldings, which have: holding sections that extend along loaded rolling-element rolling sections; return path configuring sections that configure return paths; and a pair of direction-change path inner circumference configuring sections that configure the inner circumferences of a pair of direction-change paths. The circulation path moldings are provided with a first molding in which one direction-change path inner circumference configuring sections is integrally molded with the holding section and a second molding in which the other direction-change path inner circumference configuring section is integrally molded with the return path configuring section. The first molding and the second molding are separate bodies.
    Type: Application
    Filed: December 5, 2013
    Publication date: December 17, 2015
    Applicant: THK CO., LTD.
    Inventors: Nobuyuki Maki, Fukuji Nakano, Shigemi Nakamura
  • Patent number: 8662752
    Abstract: A motion guide device has a moving block mounting surface 501 of an end plate 5 formed in a planar shape and a thinned-down portion 52 formed in an opposing moving block mounting surface 502. Moreover, in this motion guide device, a lubrication path 30 includes: a first lubrication path 30a formed extending in a horizontal direction from a surface of side surfaces parallel to a longer direction of a track rail 1 in the end plate 5 to a central portion of the end plate 5; a second lubrication path 30b formed in the central portion of the end plate 5; and a third lubrication path 30c connected to the second lubrication path and formed in a groove shape in the moving block mounting surface 501 of the end plate 5, and, moreover, the first lubrication path 30a is formed in a hollow shape continuous to inside a built-up portion 52a appended to the thinned-down portion 52 of the end plate 5.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: March 4, 2014
    Assignee: THK Co., Ltd.
    Inventors: Nobuyuki Maki, Fukuji Nakano, Shigemi Nakamura
  • Publication number: 20120328221
    Abstract: A motion guide device has a moving block mounting surface 501 of an end plate 5 formed in a planar shape and a thinned-down portion 52 formed in an opposing moving block mounting surface 502. Moreover, in this motion guide device, a lubrication path 30 includes: a first lubrication path 30a formed extending in a horizontal direction from a surface of side surfaces parallel to a longer direction of a track rail 1 in the end plate 5 to a central portion of the end plate 5; a second lubrication path 30b formed in the central portion of the end plate 5; and a third lubrication path 30c connected to the second lubrication path and formed in a groove shape in the moving block mounting surface 501 of the end plate 5, and, moreover, the first lubrication path 30a is formed in a hollow shape continuous to inside a built-up portion 52a appended to the thinned-down portion 52 of the end plate 5.
    Type: Application
    Filed: January 6, 2011
    Publication date: December 27, 2012
    Applicant: THK CO., LTD.
    Inventors: Nobuyuki Maki, Fukuji Nakano, Shigemi Nakamura