Patents by Inventor Tamio Nishimiya

Tamio Nishimiya 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: 10926338
    Abstract: The chuck mechanism includes: a chuck body 10; an axially movable plunger 40 disposed inside the chuck body; and a master jaw 20 radially movable by wedge action caused by fitting the plunger in the master jaw 20. A guide groove 11 that radially guides the master jaw and has a T-shaped cross section is formed in the chuck body. The master jaw has a narrow portion 23 and a wide portion 24 that form a T-shaped cross section. A wedge 21 fitted in a wedge groove 41 of the plunger is formed radially inside the wide portion. The end face 21a of the wedge in the width direction is positioned outward in the width direction with respect to the end face 23a of the narrow portion in the width direction.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: February 23, 2021
    Assignee: KITAGAWA IRONWORKS CO., LTD.
    Inventor: Tamio Nishimiya
  • Publication number: 20210046557
    Abstract: An object of the present invention is to obtain information corresponding to information, which is readable by sight, but no longer visible. The present invention provides a chuck mechanism comprising: a chuck body including an installation surface and a side surface; and a master jaw provided on the installation surface of the chuck body and configured to move in a radial direction of the chuck body, wherein a first marking is provided on the installation surface of the chuck body, the first marking is product information of the chuck mechanism, the product information has a readable form by sight, and at least one second marking is provided on the installation surface or the side surface of the chuck body, the second marking is information including at least the product information of the first marking, and the information of the second marking has a coded form.
    Type: Application
    Filed: February 7, 2019
    Publication date: February 18, 2021
    Applicant: KITAGAWA IRON WORKS CO., LTD
    Inventors: Tamio NISHIMIYA, Kyoichi NAKAGAWA
  • Patent number: 10864579
    Abstract: Each jaw includes a master jaw with serrations and a top jaw, with serrations, to be fastened to a T-nut. The support groove includes a first keyway into which the key is fitted, whereas the top jaw includes a second keyway into which a tip of the key is fitted. A gap exists between the key and each of the first keyway and the second keyway. The key is inclined or twisted with respect to both the first keyway and the second keyway.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: December 15, 2020
    Assignee: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio Nishimiya
  • Publication number: 20200368825
    Abstract: The present disclosure improves the accuracy of matching the center of the workpiece with the rotation center of the chuck. It provides a chuck correction method for a chuck including a body, a plunger, and jaws, the body including a rear body and a front body provided in a front side of the rear body, the plunger provided inside the body and configured to move along an axis of the body, and the jaws each configured to move in a radial direction of the axis while guided by the front body along when the plunger moves, the chuck correction method including: a correction step including moving the front body in the radial direction of the axis with a position of the rear body keeping with respect to the axis in a state that a workpiece is clamped in the jaws.
    Type: Application
    Filed: June 15, 2018
    Publication date: November 26, 2020
    Applicant: KITAGAWA IRON WORKS CO., LTD
    Inventor: Tamio NISHIMIYA
  • Patent number: 10835965
    Abstract: A chuck mechanism of the present invention includes multiple master jaws placed movably in a radial direction on a front surface of a chuck body, and top jaws each detachably attached to front surfaces of the top jaws. Each master jaw and each top jaw have a raised portion and a recessed portion engageable with each other. Each of the raised and recessed portions has conical surfaces formed by part of a conical body. Each top jaw has a gripping surface formed by part of a circular columnar body. Upon work gripping, the center axes of the conical surfaces on a gripping side among the conical surfaces of each master jaw and each top jaw and the center axis of the gripping surface are all coincident with a rotation axis of the chuck body.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: November 17, 2020
    Assignee: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio Nishimiya
  • Publication number: 20200316692
    Abstract: An inner circumferential surface of a chuck body (2) has three fitting recesses (22) curved as viewed from a rotational axis (C1). An outward elastic deformation that occurs, through gripping of a work (W1) with top jaws (5), at portions of a plunger (3) which correspond to slide holes (31a) causes the portions deformed by the elastic deformation to slide on the respective recessed portions (22) so that the plunger (3) is moved to cause a symmetry axis (Y1) of the slide hole (31a) to coincide with a symmetry axis (Y2) of a guide groove (25) of the chuck body (2).
    Type: Application
    Filed: May 25, 2017
    Publication date: October 8, 2020
    Applicant: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio NISHIMIYA
  • Publication number: 20200230711
    Abstract: The chuck mechanism includes: a chuck body 10; an axially movable plunger 40 disposed inside the chuck body; and a master jaw 20 radially movable by wedge action caused by fitting the plunger in the master jaw 20. A guide groove 11 that radially guides the master jaw and has a T-shaped cross section is formed in the chuck body. The master jaw has a narrow portion 23 and a wide portion 24 that form a T-shaped cross section. A wedge 21 fitted in a wedge groove 41 of the plunger is formed radially inside the wide portion. The end face 21a of the wedge in the width direction is positioned outward in the width direction with respect to the end face 23a of the narrow portion in the width direction.
    Type: Application
    Filed: May 22, 2018
    Publication date: July 23, 2020
    Applicant: KITAGAWA IRONWORKS CO., LTD.
    Inventor: Tamio NISHIMIYA
  • Publication number: 20200215622
    Abstract: Each jaw includes a master jaw with serrations and a top jaw, with serrations, to be fastened to a T-nut. The support groove includes a first keyway into which the key is fitted, whereas the top jaw includes a second keyway into which a tip of the key is fitted. A gap exists between the key and each of the first keyway and the second keyway. The key is inclined or twisted with respect to both the first keyway and the second keyway.
    Type: Application
    Filed: February 8, 2018
    Publication date: July 9, 2020
    Applicant: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio NISHIMIYA
  • Patent number: 10688567
    Abstract: Provided is a retracting chuck that does not rattle even though a moving body can be operated axially, and that enables turning in which the grasp accuracy is increased and vibration and chatter are inhibited. The retracting chuck (100) is provided with: a body (1) comprising a rear body (2) disposed on the axial rear side and a moving body (3) disposed on the axial front side; a plunger (8) moving axially in the body (1); and a master jaw (6) which engages with the plunger (8) and which is caused by a wedge action to move in the radial direction by a slot (3a) formed in the moving body (3). The moving body (3) moves axially relative to the rear body (2). In the rear of body (2), a plate spring (11) is disposed in a bridging manner between seats (2a) provided at a distance from each other, and the plate spring (11) is fastened by a bolt (13) to each of the seats (2a). Between the seats (2a), the plate spring (11) is fastened by a bolt (16) to a seat (3b) of the moving body (3).
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: June 23, 2020
    Assignee: KITAGAWA IRON WORKS CO., LTD
    Inventor: Tamio Nishimiya
  • Publication number: 20200061720
    Abstract: A chuck mechanism of the present invention includes multiple master jaws placed movably in a radial direction on a front surface of a chuck body, and top jaws each detachably attached to front surfaces of the top jaws. Each master jaw and each top jaw have a raised portion and a recessed portion engageable with each other. Each of the raised and recessed portions has conical surfaces formed by part of a conical body. Each top jaw has a gripping surface formed by part of a circular columnar body. Upon work gripping, the center axes of the conical surfaces on a gripping side among the conical surfaces of each master jaw and each top jaw and the center axis of the gripping surface are all coincident with a rotation axis of the chuck body.
    Type: Application
    Filed: April 18, 2018
    Publication date: February 27, 2020
    Applicant: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio NISHIMIYA
  • Publication number: 20190329327
    Abstract: The present invention provides an inexpensive chuck device that can achieve both a stable gripping operation and a high degree of accuracy in gripping and can also reduce limitations in the gripping of a workpiece. According to the present invention, a chuck device is provided, the chuck device being characterized by comprising a chuck main body and a master jaw, wherein the chuck main body has an oscillation supporting hole, and the oscillation supporting holes are rotatably provided in plurality around a rotational axis of the chuck main body, and wherein the master jaw has a top jaw detachably provided on one end thereof, and is fitted into the oscillation supporting hole while maintaining surface contact therewith to enable sliding contact.
    Type: Application
    Filed: November 24, 2017
    Publication date: October 31, 2019
    Applicant: KITAGAWA IRON WORKS CO., LTD
    Inventors: Naoyuki MASATSUGU, Toshihito NAKAMURA, Tamio NISHIMIYA, Youji YAMAGUCHI, Shuya ISHIKAWA, Yuichi HIRATA, Masanobu MIKAMI, Yujiro OKA
  • Publication number: 20190030617
    Abstract: Provided is a retracting chuck that does not rattle even though a moving body can be operated axially, and that enables turning in which the grasp accuracy is increase and vibration and chatter are inhibited. The retracting chuck (100) is provided with: a body (1) comprising a rear body (2) disposed on the axial rear side and a moving body (3) disposed on the axial front side; a plunger (8) moving axially in the body (1); and a master jaw (6) which engages with the plunger (8) and which is caused by a wedge action to move in the radial direction by a slot (3a) provided to the moving body (3). The moving body (3) moves axially relative to the rear body (2). In the rear body (2), a plate spring (11) is disposed in a bridging manner between seats (2a) provided at a distance from each other, and the plate spring (11) is fastened by a bolt (13) to each of the seats (2a).
    Type: Application
    Filed: January 17, 2017
    Publication date: January 31, 2019
    Inventor: Tamio NISHIMIYA
  • Patent number: 7311312
    Abstract: A chuck body is made up of axially movable plungers and jaws, in which the jaw has a master jaw body obliquely arranged with respect to an axis of the chuck body, the jaw also has a front face of the master jaw body and a rear end face of a master jaw head for restricting a position of the jaw with respect to the chuck body, a plunger receives a bushing which acts as a wedge means cooperating with the master jaw body, a driver at a rear end of the master jaw body being restricted in a backward movement within a range of a gap ?, and a wedge having a structure of canceling a moment applied to the jaw as a result of clamping, the driver providing a reactant force to the master jaw body for canceling a drawing force applied to a plunger.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: December 25, 2007
    Assignee: Kabushiki Kaisha Kitagawa Tekkosho
    Inventors: Tamio Nishimiya, Satoshi Isohisa, Naoyuki Masatsugu, Toshihito Nakamura
  • Publication number: 20040169342
    Abstract: The invention has been developed to solve the drawbacks of the conventional chuck construction, and it is an object of the invention to provide a compact chuck construction, by omitting the axial movement parts, which are inevitable in the conventional chuck construction. A chuck body 10 comprising an axially movable plunger 30 and a jaw 20, in which said jaw 20 having master jaw body 24 obliquely arranged with respect to the axis, said plunger 30 having a bush 41 which act as a wedge, and a driving means 50 at the rear end of the master jaw body 24, said wedge means 40 having a structure of canceling a moment applied to the jaw 20 as a result of clamping and the driving means 50 providing a reactant force to the master jaw body 24 for canceling drawing force applied to the plunger 30.
    Type: Application
    Filed: January 14, 2004
    Publication date: September 2, 2004
    Inventors: Tamio Nishimiya, Satoshi Isohisa, Naoyuki Masatsugu, Toshihito Nakamura
  • Patent number: D859481
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: September 10, 2019
    Assignee: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio Nishimiya