Patents by Inventor Shoji Nagao

Shoji Nagao 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: 10408261
    Abstract: A linear motion guide unit restrains fluctuations in sliding friction and generation of heat by correcting the postures of rollers having been inclined in a no-load area such that their axes become orthogonal to a guide surface of a carriage to thereby introduce the rollers in proper postures into a load area. A retainer plate of the guide unit has a guide surface for guiding end surfaces of the rollers and has protrusions protruding from the guide surface at its opposite end portions facing crownings of the carriage. The rollers rolling from a turnaround passage to a load-carrying race are pressed by the protrusions toward the guide surface of the carriage so as to be arrayed in such a posture that the axes of the rollers become orthogonal to the guide surface on the inlet side of the crowning of the carriage, whereby the occurrence of roller skew is prevented.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: September 10, 2019
    Assignee: NIPPON THOMPSON CO., LTD.
    Inventors: Tomoyuki Hayashi, Shoji Nagao, Masahiro Miura
  • Patent number: 10378581
    Abstract: In the linear motion guide unit, a retainer plate for retaining rolling elements, or rollers, is prevented from deformation so as to smoothly guide the rollers. The retainer plate is composed of a retainer member, frame members fitted into respective through holes formed in the retainer member, and a fixing member disposed in a longitudinally extending recess of the retainer member. The frame members form a predetermined gap between the fixing member and a carriage. Tightening forces of fastening bolts are not applied to the retainer member, thereby avoiding deformation of the retainer member.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: August 13, 2019
    Assignee: NIPPON THOMPSON CO., LTD.
    Inventors: Shoji Nagao, Tomoyuki Hayashi, Masahiro Miura
  • Publication number: 20180347626
    Abstract: In the linear motion guide unit, a retainer plate for retaining rolling elements, or rollers, is prevented from deformation so as to smoothly guide the rollers. The retainer plate is composed of a retainer member, frame members fitted into respective through holes formed in the retainer member, and a fixing member disposed in a longitudinally extending recess of the retainer member. The frame members form a predetermined gap between the fixing member and a carriage. Tightening forces of fastening bolts are not applied to the retainer member, thereby avoiding deformation of the retainer member.
    Type: Application
    Filed: May 29, 2018
    Publication date: December 6, 2018
    Inventors: Shoji NAGAO, Tomoyuki HAYASHI, Masahiro MIURA
  • Publication number: 20180283450
    Abstract: A linear motion guide unit restrains fluctuations in sliding friction and generation of heat by correcting the postures of rollers having been inclined in a no-load area such that their axes become orthogonal to a guide surface of a carriage to thereby introduce the rollers in proper postures into a load area. A retainer plate of the guide unit has a guide surface for guiding end surfaces of the rollers and has protrusions protruding from the guide surface at its opposite end portions facing crownings of the carriage. The rollers rolling from a turnaround passage to a load-carrying race are pressed by the protrusions toward the guide surface of the carriage so as to be arrayed in such a posture that the axes of the rollers become orthogonal to the guide surface on the inlet side of the crowning of the carriage, whereby the occurrence of roller skew is prevented.
    Type: Application
    Filed: March 29, 2018
    Publication date: October 4, 2018
    Inventors: Tomoyuki HAYASHI, Shoji NAGAO, Masahiro MIURA
  • Patent number: 9759647
    Abstract: A wear-proof tester to evaluate an anti-frictional performance of surface treatment carried on a needle cage. The needle cage is subjected to flex under the centrifugal force of composite revolution and rotation. Wear-proof test of surface treatment is carried by sliding contact between the outside circular surface of the retainer and the inside circular surface of the outside wheel. The retainer with no roller is fastened on a rotary shaft with leaving a clearance between them. A radial load is applied to retainer through a test outside wheel to get the retainer flexed to make sliding contact over a predetermined area between the outside circular surface of the retainer and the inside circular surface of the outside wheel. This wear-proof tester is applicable to the wear-proof tests of various materials other than the wear-proof test of the retainer made of various materials.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: September 12, 2017
    Assignee: NIPPON THOMPSON CO., LTD.
    Inventors: Shoji Nagao, Akihide Yanagitani
  • Publication number: 20160178505
    Abstract: A wear-proof tester to evaluate an anti-frictional performance of surface treatment carried on a needle cage. The needle cage is subjected to flex under the centrifugal force of composite revolution and rotation. Wear-proof test of surface treatment is carried by sliding contact between the outside circular surface of the retainer and the inside circular surface of the outside wheel. The retainer with no roller is fastened on a rotary shaft with leaving a clearance between them. A radial load is applied to retainer through a test outside wheel to get the retainer flexed to make sliding contact over a predetermined area between the outside circular surface of the retainer and the inside circular surface of the outside wheel. This wear-proof tester is applicable to the wear-proof tests of various materials other than the wear-proof test of the retainer made of various materials.
    Type: Application
    Filed: September 14, 2015
    Publication date: June 23, 2016
    Inventors: Shoji NAGAO, Akihide YANAGITANI
  • Patent number: 8562223
    Abstract: A rolling-contact bearing has an outer ring, an inner ring or a shaft rotational relative to the outer ring and a full complement of rollers disposed for rotation between the outer ring and the shaft. A semisolid gel-like lubricant composed of a mixture of a gelling agent and lubricating oil is packed into interstices or gaps between the outer ring and the rollers and among the adjacent rollers to retain surely the rollers on a circular inside surface of the outer ring. The gel-like lubricant is composed of the lubricating oil of mineral oil or base oil, and a powdery oil gelling agent based on amino acids.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: October 22, 2013
    Assignee: Nippon Thompson Co., Ltd.
    Inventors: Kengo Hidano, Shoji Nagao, Shigmasa Itabashi, Akihide Yanagitani
  • Publication number: 20120230623
    Abstract: A rolling-contact bearing has an outer ring, an inner ring or a shaft rotational relative to the outer ring and a full complement of rollers disposed for rotation between the outer ring and the shaft. A semisolid gel-like lubricant composed of a mixture of a gelling agent and lubricating oil is packed into interstices or gaps between the outer ring and the rollers and among the adjacent rollers to retain surely the rollers on a circular inside surface of the outer ring. The gel-like lubricant is composed of the lubricating oil of mineral oil or base oil, and a powdery oil gelling agent based on amino acids.
    Type: Application
    Filed: February 22, 2012
    Publication date: September 13, 2012
    Applicant: NIPPON THOMPSON CO., LTD.
    Inventors: Kengo HIDANO, Shoji Nagao, Shigemasa Itabashi, Akihide Yanagitani
  • Publication number: 20070229425
    Abstract: To provide a technology capable of transmitting image information at a high speed under the same physical conditions as those in the prior arts. An image information transmitting method of the present invention includes replacing, in data with a plurality of gradations that form image information, high-order data with low-order data, thinning out the data with the plurality of gradations that form the image information by deleting the low-order data, and consecutively outputting the post-thinning-out image information or the post-replacing image information.
    Type: Application
    Filed: November 22, 2006
    Publication date: October 4, 2007
    Applicant: FUJITSU LIMITED
    Inventor: Shoji Nagao
  • Patent number: 6417827
    Abstract: A MOS transistor (M1) which is arranged in the highest order of a low Vth MOS transistor grayscale group of a decoder circuit of a drain driver is formed of a CMOS transistor, to prevent a current from flowing from an output side into the low Vth MOS transistor portion owing to a grayscale voltage applied to another portion.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: July 9, 2002
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Shoji Nagao, Takahiro Fujioka, Mitsuru Goto, Kazunari Saito, Shinji Yasukawa, Yozo Nakayasu, Kentaro Agata