Patents by Inventor Futoshi Kosugi
Futoshi Kosugi 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).
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Publication number: 20160178007Abstract: A ball guide type ball bearing retainer (3) according to the present invention retains balls (4) in pockets (Pt) provided in a circular ring portion (5), and the circular ring portion (5) includes annular portions (6, 7) disposed at both sides in an axial direction and pillar portions (8) which connect the annular portions (6, 7). Each pocket (Pt) is formed by the annular portions (6, 7) at the both sides and the pillar portions (8) adjacent to each other. At outer diameter portions of the pillar portions (8), outer diameter restriction portions (9) are provided which extend toward a pocket side and restrict and guide the balls (4) from an outer diameter side with guide surfaces (9a) thereof, and are inclined flat surfaces which are inclined so as reach a large diameter side as extending from the pillar portions (8) toward a pocket (Pt) center side.Type: ApplicationFiled: February 25, 2016Publication date: June 23, 2016Applicant: NTN CORPORATIONInventors: Mineo KOYAMA, Wakana INOUE, Futoshi KOSUGI
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Patent number: 8956050Abstract: A rolling bearing includes rolling elements interposed between rolling surfaces of an inner ring and an outer ring. An oil supply hole for lubricant oil supply is provided in the outer ring so as to communicate between an outer diameter surface of the outer ring and a position, near the rolling surface, in an inner peripheral surface of the outer ring. A circumferential groove is provided on the outer diameter surface of the outer ring so as to communicate with the oil supply hole to introduce, to the oil supply hole, a lubricant oil supplied from a circumferential position outside the bearing that is different from that of the oil supply hole.Type: GrantFiled: October 13, 2011Date of Patent: February 17, 2015Assignee: NTN CorporationInventor: Futoshi Kosugi
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Publication number: 20130202237Abstract: A rolling bearing includes rolling elements (3) interposed between rolling surfaces (1a, 2a) of an inner ring (1) and an outer ring (2). An oil supply hole (2c) for lubricant oil supply is provided in the outer ring (2) so as to communicate between an outer diameter surface (2d) of the outer ring (2) and a position, near the rolling surface, in an inner peripheral surface (2g) of the outer ring (2d). A circumferential groove (2b) is provided on the outer diameter surface (2d) of the outer ring (2) so as to communicate with the oil supply hole (2c) to introduce, to the oil supply hole (2c), a lubricant oil supplied from a circumferential position outside the bearing that is different from that of the oil supply hole (2c).Type: ApplicationFiled: October 13, 2011Publication date: August 8, 2013Inventor: Futoshi Kosugi
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Patent number: 7374019Abstract: There is provided a lubricating method for a rolling bearing assembly capable of achieving a reliable lubrication and exhibiting a stable temperature rise. The method is for supplying a lubricant oil to the rolling bearing assembly during the operation thereof, in which in order to keep the temperature of a rolling bearing assembly (103) within a predetermined tolerance, the amount of the lubricant oil to be supplied during the operation is automatically or manually adjusted by means of a supply adjusting unit (102). Supply of the lubricant oil is performed in the form of an air/oil mixture by the use of a lubricant supply unit (101). The amount of the lubricant oil supplied varies depending on the rotational speed of the rolling bearing assembly (103).Type: GrantFiled: March 3, 2003Date of Patent: May 20, 2008Assignee: NTN CorporationInventors: Futoshi Kosugi, Masatsugu Mori, Keiichi Ueda
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Patent number: 7267489Abstract: A bearing assembly includes a double-row cylindrical roller bearing having no seals and having a grease sealed in its internal space. A double-row angular ball bearing having seals is provided in juxtaposition with one end face of the double-row cylindrical roller bearing. During run-in, part of the grease sealed in the double-row cylindrical roller bearing adheres to the outer surface of one of the seals of the angular ball bearing that faces the internal space of the cylindrical roller bearing. This increases the initial amount of grease sealed in the internal space of the cylindrical roller bearing, thereby prolonging its life.Type: GrantFiled: November 30, 2004Date of Patent: September 11, 2007Assignee: NTN CorporationInventors: Futoshi Kosugi, Hiroshi Takiuchi
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Publication number: 20050252722Abstract: There is provided a lubricating method for a rolling bearing assembly capable of achieving a reliable lubrication and exhibiting a stable temperature rise. The method is for supplying a lubricant oil to the rolling bearing assembly during the operation thereof, in which in order to keep the temperature of a rolling bearing assembly (103) within a predetermined tolerance, the amount of the lubricant oil to be supplied during the operation is automatically or manually adjusted by means of a supply adjusting unit (102). Supply of the lubricant oil is performed in the form of an air/oil mixture by the use of a lubricant supply unit (101). The amount of the lubricant oil supplied varies depending on the rotational speed of the rolling bearing assembly (103).Type: ApplicationFiled: March 3, 2003Publication date: November 17, 2005Inventors: Futoshi Kosugi, Masatsugu Mori, Keiichi Ueda
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Publication number: 20050117824Abstract: A bearing assembly includes a double-row cylindrical roller bearing having no seals and having a grease sealed in its internal space. A double-row angular ball bearing having seals is provided in juxtaposition with one end face of the double-row cylindrical roller bearing. During run-in, part of the grease sealed in the double-row cylindrical roller bearing adheres to the outer surface of one of the seals of the angular ball bearing that faces the internal space of the cylindrical roller bearing. This increases the initial amount of grease sealed in the internal space of the cylindrical roller bearing, thereby prolonging its life.Type: ApplicationFiled: November 30, 2004Publication date: June 2, 2005Inventors: Futoshi Kosugi, Hiroshi Takiuchi
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Patent number: 6393938Abstract: Cam follower includes a cantilevered stud, and a bearing unit mounted on a head portion of the stud and having rollers and an outer ring. The outer peripheral surface of the outer ring constitutes a cam-driven surface. The cam-driven surface includes a central load-bearing region substantially parallel to the axis of the cantilevered stud, and a couple of load-reducing bearing regions indented radially inward from the central load-bearing region and located on opposite sides of the central load-bearing region axially symmetrically to each other. Mechanical stress acting on the inner surface of the outer ring, outer surface of the roller and outer surface of the stud's head portion presents a maximum intensity level at their respective points corresponding to a point of the outer ring which is subjected to maximum mechanical contact stress from a cam.Type: GrantFiled: September 22, 1999Date of Patent: May 28, 2002Assignee: Tsubakimoto Chain Co.Inventors: Shinsuke Sahara, Tatsuo Maeno, Futoshi Kosugi
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Publication number: 20020033068Abstract: Cam follower includes a cantilevered stud, and a bearing unit mounted on a head portion of the stud and having rollers and an outer ring. The outer peripheral surface of the outer ring constitutes a cam-driven surface. The cam-driven surface includes a central load-bearing region substantially parallel to the axis of the cantilevered stud, and a couple of non-load-bearing regions indented radially inward from the central load-bearing region and located on opposite sides of the central load-bearing region axially symmetrically to each other. Mechanical stress acting on the inner surface of the outer ring, outer surface of the roller and outer surface of the stud's head portion presents a maximum intensity level at their respective points corresponding to a point of the outer ring which is subjected to maximum mechanical contact stress from a cam.Type: ApplicationFiled: September 22, 1999Publication date: March 21, 2002Applicant: DANN DORFMAN, HERRELL AND SKILLMANInventors: SHINSUKE SAHARA, TATSUO MAENO, FUTOSHI KOSUGI