Patents by Inventor Hirotoshi Aramaki
Hirotoshi Aramaki 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: 20090256341Abstract: A fastener (1) for joining together two members (5, 6) includes a ring main body (3), a plurality of projecting portions (4) which are provided on the ring main body in a circumferential direction at intervals, and a plurality of recessed portions (10) which are provided on the projecting portions, whereby when the two members move relative to each other, a stable frictional resisting force can be imparted.Type: ApplicationFiled: April 24, 2007Publication date: October 15, 2009Applicant: NSK LTD.Inventors: Jun Okada, Hirotoshi Aramaki
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Patent number: 7587299Abstract: An anomaly diagnosis apparatus for analyzing sound or vibration data produced by a machine installation and diagnosing the presence or absence of an anomaly in a sliding member in the machine installation which is made up of a diagnosis processing server (1) and a user information processing terminal (3) which are connected through a network (2). The diagnosis processing server (1) receives the sound or vibration data produced by the machine installation and information for identifying the sliding member used with the machine installation through the network (2) from the user information processing terminal 3, makes an anomaly diagnosis of the machine installation based on the received data, and transmits the diagnosis result through the network (2) to the user information processing terminal (3), thereby lightening the burden of the user and executing anomaly diagnosis processing promptly.Type: GrantFiled: August 29, 2007Date of Patent: September 8, 2009Assignee: NSK Ltd.Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutoh, Shinichiro Asaeda
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Publication number: 20080027659Abstract: An object of the invention is to provide an anomaly diagnosis apparatus of a machine installation for eliminating the need for the user to have a dedicated analytical instrument or a skill required for anomaly diagnosis of a sliding member and enabling the user to easily make an anomaly diagnosis request with a small burden and get the diagnosis result promptly. In the invention, an anomaly diagnosis apparatus for analyzing sound or vibration data produced by a machine installation and diagnosing the presence or absence of an anomaly in a sliding member in the machine installation is made up of a diagnosis processing server (1) and a user information processing terminal (3) which are connected through a network (2).Type: ApplicationFiled: August 29, 2007Publication date: January 31, 2008Applicant: NSK LtdInventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutoh, Shinichiro Asaeda
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Publication number: 20080010039Abstract: An object of the invention is to provide an anomaly diagnosis apparatus of a machine installation for eliminating the need for the user to have a dedicated analytical instrument or a skill required for anomaly diagnosis of a sliding member and enabling the user to easily make an anomaly diagnosis request with a small burden and get the diagnosis result promptly. In the invention, an anomaly diagnosis apparatus for analyzing sound or vibration data produced by a machine installation and diagnosing the presence or absence of an anomaly in a sliding member in the machine installation is made up of a diagnosis processing server (1) and a user information processing terminal (3) which are connected through a network (2).Type: ApplicationFiled: August 29, 2007Publication date: January 10, 2008Applicant: NSK LtdInventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutoh, Shinichiro Asaeda
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Publication number: 20070118333Abstract: An abnormality diagnosis system for diagnosing a presence or absence of an abnormality of a bearing unit for a railway vehicle axle, comprises a sensing/processing portion for outputting a signal generated from the bearing unit as an electric signal, a calculating/processing portion for making an abnormality diagnosis of the bearing unit based on an output of the sensing/processing portion, a result outputting portion for outputting a decision result of the calculating/processing portion, and a controlling/processing portion for feeding back a control signal to a control system of the railway vehicle based on the decision result.Type: ApplicationFiled: December 27, 2006Publication date: May 24, 2007Applicant: NSK LTD.Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutou, Juntaro Sahara
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Patent number: 7184930Abstract: An abnormality diagnosis system for diagnosing a presence or absence of an abnormality of a bearing unit for a railway vehicle axle, comprises a sensing/processing portion for outputting a signal generated from the bearing unit as an electric signal, a calculating/processing portion for making an abnormality diagnosis of the bearing unit based on an output of the sensing/processing portion, a result outputting portion for outputting a decision result of the calculating/processing portion, and a controlling/processing portion for feeding back a control signal to a control system of the railway vehicle based on the decision result.Type: GrantFiled: August 29, 2003Date of Patent: February 27, 2007Assignee: NSK Ltd.Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutou, Juntaro Sahara
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Patent number: 7172343Abstract: A rolling bearing includes: an inner ring mounted on a shaft to be supported; an outer ring provided around an outer periphery of the inner ring; a plurality of rolling elements rolling while contacting with an inner peripheral face of the outer ring and an outer peripheral face of the inner ring at surfaces thereof; and a retainer supporting the rolling elements. A sliding resistance-reducing film is formed on at least one of a first group being an outer peripheral face of the retainer or the inner peripheral face of the outer ring and a second group being an inner peripheral face of the retainer or the outer peripheral face of the inner ring.Type: GrantFiled: February 22, 2005Date of Patent: February 6, 2007Assignee: NSK Ltd.Inventors: Dai Kinno, Tsuyoshi Saito, Yasushi Tomizuka, Taikou Nawamoto, Hirotoshi Aramaki
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Patent number: 7104919Abstract: A toroidal-type continuously variable transmission, has: first and second disks; a plurality of trunnions; a plurality of displacement shafts respectively supported on associated trunnions; a plurality of power rollers respectively interposed between the first and second disks; and, a plurality of thrust bearings respectively interposed between the power rollers and trunnions, each of the thrust bearings including an outer ring, an inner raceway formed in the outer end face of the power roller, a plurality of rolling elements, and a circular-ring-shaped retainer, wherein, in case where the density of a retainer material constituting the retainer is ?d, the elastic modulus of the retainer material is Ed, the density of rolling element materials is ?c and the elastic modulus of the rolling element materials is Ec, { ( ? d · E d ) / ( ? c · E c ) } 1 2 ? 0.6 is satisfied.Type: GrantFiled: August 28, 2003Date of Patent: September 12, 2006Assignee: NSK Ltd.Inventors: Hiroshi Kato, Hirotoshi Aramaki, Shinichi Natsumeda
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Publication number: 20060167659Abstract: An abnormality diagnosis system for diagnosing a presence or absence of an abnormality of a bearing unit for a railway vehicle axle, comprises a sensing/processing portion for outputting a signal generated from the bearing unit as an electric signal, a calculating/processing portion for making an abnormality diagnosis of the bearing unit based on an output of the sensing/processing portion, a result outputting portion for outputting a decision result of the calculating/processing portion, and a controlling/processing portion for feeding back a control signal to a control system of the railway vehicle based on the decision result.Type: ApplicationFiled: August 29, 2003Publication date: July 27, 2006Applicant: NSK LTD.Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutou, Juntaro Sahara
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Patent number: 6994474Abstract: A rolling bearing includes: an inner ring mounted on a shaft to be supported; an outer ring provided around an outer periphery of the inner ring; a plurality of rolling elements rolling while contacting with an inner peripheral face of the outer ring and an outer peripheral face of the inner ring at surfaces thereof; and a retainer supporting the rolling elements. A sliding resistance-reducing film is formed on at least one of a first group being an outer peripheral face of the retainer or the inner peripheral face of the outer ring and a second group being an inner peripheral face of the retainer or the outer peripheral face of the inner ring.Type: GrantFiled: April 10, 2002Date of Patent: February 7, 2006Assignee: NSK Ltd.Inventors: Dai Kinno, Tsuyoshi Saito, Yasushi Tomizuka, Taikou Nawamoto, Hirotoshi Aramaki
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Patent number: 6955468Abstract: A linear-motion device has: a linear-motion element fitted on a shaft which moves straight along the shaft; a plurality of balls which are retained in a ball groove formed on the inner side of the linear-motion element and roll over between the ball groove and the shaft; a separator interposed between the balls; and, a circulating path formed in the linear-motion element through which the balls are circulated from one end of the ball groove to the other, which is filled with a grease, wherein the separator is a formed product comprising as a resin component a polybutylene naphthalate-based elastomer formed by a hard segment made of a polybutylene naphthalate and a soft segment made of a polycondensate of 2,6-naphthalanedicarboxylic acid with a polytetramethylene ether glycol.Type: GrantFiled: November 8, 2002Date of Patent: October 18, 2005Assignee: NSK.Ltd.Inventors: Toshikazu Yabe, Soichiro Kato, Hiroki Yamaguchi, Tatsunobu Momono, Juntaro Sahara, Hirotoshi Aramaki
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Publication number: 20050141797Abstract: A rolling bearing includes: an inner ring mounted on a shaft to be supported; an outer ring provided around an outer periphery of the inner ring; a plurality of rolling elements rolling while contacting with an inner peripheral face of the outer ring and an outer peripheral face of the inner ring at surfaces thereof; and a retainer supporting the rolling elements. A sliding resistance-reducing film is formed on at least one of a first group being an outer peripheral face of the retainer or the inner peripheral face of the outer ring and a second group being an inner peripheral face of the retainer or the outer peripheral face of the inner ring.Type: ApplicationFiled: February 22, 2005Publication date: June 30, 2005Inventors: Dai Kinno, Ysuyoshi Saito, Yasushi Tomizuka, Taikou Nawamoto, Hirotoshi Aramaki
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Patent number: 6896415Abstract: In a bearing apparatus which is composed of two bearings each including a crown-shaped retainer and in which a lubricant is filled into its raceways, a preload is applied from the retainer pocket-opening side end face of an inner ring, and also a preload is applied from the retainer counter-pocket-opening side end face of an outer ring.Type: GrantFiled: July 9, 2002Date of Patent: May 24, 2005Assignee: NSK, Ltd.Inventors: Hiroshi Ishiwada, Mamoru Aoki, Seizou Miyazaki, Taikou Nawamoto, Hirotoshi Aramaki
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Patent number: 6782385Abstract: When an information provision program is implemented, an input screen is displayed on a display section (step 101). A specific designation number is input (step 103), and one or plural bearing performance indexes are selected (step 107). When bearing performance indexes are selected, bearing service conditions which are required depending on the bearing performance indexes are input. Then, performance calculation programs corresponding to selected bearing performances are activated (steps 110-1, 110-2, . . .), and obtained calculation results are simultaneously displayed.Type: GrantFiled: October 4, 2001Date of Patent: August 24, 2004Assignee: NSK Ltd.Inventors: Shinichi Natsumeda, Hirotoshi Aramaki, Yoshio Shoda
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Publication number: 20040102285Abstract: A toroidal-type continuously variable transmission, has: first and second disks; a plurality of trunnions; a plurality of displacement shafts respectively supported on associated trunnions; a plurality of power rollers respectively interposed between the first and second disks; and, a plurality of thrust bearings respectively interposed between the power rollers and trunnions, each of the thrust bearings including an outer ring, an inner raceway formed in the outer end face of the power roller, a plurality of rolling elements, and a circular-ring-shaped retainer, wherein, in case where the density of a retainer material constituting the retainer is &rgr;d, the elastic modulus of the retainer material is Ed, the density of rolling element materials is &rgr;c and the elastic modulus of the rolling element materials is Ec, 1 { ( ρ d · E d ) / ( ρ c · E c ) } 1 2 ≤ 0.Type: ApplicationFiled: August 28, 2003Publication date: May 27, 2004Applicant: NSK LTD.Inventors: Hiroshi Kato, Hirotoshi Aramaki, Shinichi Natsumeda
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Publication number: 20040030419Abstract: An object of the invention is to provide an anomaly diagnosis apparatus of a machine installation for eliminating the need for the user to have a dedicated analytical instrument or a skill required for anomaly diagnosis of a sliding member and enabling the user to easily make an anomaly diagnosis request with a small burden and get the diagnosis result promptly.Type: ApplicationFiled: May 5, 2003Publication date: February 12, 2004Inventors: Takanori Miyasaka, Hirotoshi Aramaki, Yasushi Mutoh, Shinichiro Asaeda
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Publication number: 20030128901Abstract: A linear-motion device has: a linear-motion element fitted on a shaft which moves straight along the shaft; a plurality of balls which are retained in a ball groove formed on the inner side of the linear-motion element and roll over between the ball groove and the shaft; a separator interposed between the balls; and, a circulating path formed in the linear-motion element through which the balls are circulated from one end of the ball groove to the other, which is filled with a grease, wherein the separator is a formed product comprising as a resin component a polybutylene naphthalate-based elastomer formed by a hard segment made of a polybutylene naphthalate and a soft segment made of a polycondensate of 2,6-naphthalanedicarboxylic acid with a polytetramethylene ether glycol.Type: ApplicationFiled: November 8, 2002Publication date: July 10, 2003Applicant: NSK LTD.Inventors: Toshikazu Yabe, Soichiro Kato, Hiroki Yamaguchi, Tatsunobu Momono, Juntaro Sahara, Hirotoshi Aramaki
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Publication number: 20030099416Abstract: A rolling bearing includes: an inner ring mounted on a shaft to be supported; an outer ring provided around an outer periphery of the inner ring; a plurality of rolling elements rolling while contacting with an inner peripheral face of the outer ring and an outer peripheral face of the inner ring at surfaces thereof; and a retainer supporting the rolling elements. A sliding resistance-reducing film is formed on at least one of a first group being an outer peripheral face of the retainer or the inner peripheral face of the outer ring and a second group being an inner peripheral face of the retainer or the outer peripheral face of the inner ring.Type: ApplicationFiled: April 10, 2002Publication date: May 29, 2003Applicant: NSK LTD.Inventors: Dai Kinno, Tsuyoshi Saito, Yasushi Tomizuka, Taikou Nawamoto, Hirotoshi Aramaki
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Publication number: 20030026510Abstract: In a bearing apparatus which are composed of two bearings each including a crown-shaped retainer and also in which a lubricant is filled into raceways formed in the two bearings, not only a preload is applied from the retainer pocket opening side end face of an inner ring but also a preload is applied from the retainer pocket counter-opening side end face of an outer ring.Type: ApplicationFiled: July 9, 2002Publication date: February 6, 2003Applicant: NSK LTD.Inventors: Hiroshi Ishiwada, Mamoru Aoki, Seizou Miyazaki, Taikou Nawamoto, Hirotoshi Aramaki
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Patent number: 6481898Abstract: A ball bearing in which the heat value in an inner ring is decreased and the heat value in an outer ring is brought closer to the heat value in the inner ring by making the radius of curvature for the inner ring groove larger, and defining the radius of curvature for the outer ring groove as 50.5% to 53.0% of the ball diameter. The arrangement of the present invention suppresses the heat value in the entire ball bearing and extends the bearing life at a reduced cost without using a large flow rate lubrication method or a preloading method such as constant preloading. In addition, a decrease in heat generation, seizing resistance and wear resistance can be attained further by optimizing a relation between the raceway groove and the ball diameter, by optimizing the number of balls, by controlling the ingredient composition for the material of the bearing ring, and by forming a hard deposition film on the surface of the raceway groove.Type: GrantFiled: August 10, 2000Date of Patent: November 19, 2002Assignee: NSK Ltd.Inventors: Kenji Yakura, Hirotoshi Aramaki, Yukio Ooura, Akio Fujii, Sumio Sugita, Dai Kinno, Shoji Noguchi, Koji Ueda