Patents by Inventor Yasushi Kadota
Yasushi Kadota 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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Patent number: 9050649Abstract: Portions of a pair of first pin members, a pair of second pin members, and a pair of third pin members other than one end portions thereof are respectively inserted into and held in a pair of first holding holes, a pair of second holding holes and a pair of third holding holes that extend perpendicularly to reference surfaces that are top faces of first to third connected body assembly jigs. In this state, a single first link plate, a single second link plate and a third link plate are press-fitted onto the one end portions until the first to third link plates come into contact with the reference surfaces. In this way, first to third multiple connected bodies are assembled. Then, the first to third multiple connected bodies and multiple fourth link plates are assembled into a power transmission chain.Type: GrantFiled: May 20, 2014Date of Patent: June 9, 2015Assignee: JTEKT CORPORATIONInventors: Yasushi Kadota, Shinji Yasuhara, Taizou Wakayama
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Publication number: 20140352274Abstract: Portions of a pair of first pin members, a pair of second pin members, and a pair of third pin members other than one end portions thereof are respectively inserted into and held in a pair of first holding holes, a pair of second holding holes and a pair of third holding holes that extend perpendicularly to reference surfaces that are top faces of first to third connected body assembly jigs. In this state, a single first link plate, a single second link plate and a third link plate are press-fitted onto the one end portions until the first to third link plates come into contact with the reference surfaces. In this way, first to third multiple connected bodies are assembled. Then, the first to third multiple connected bodies and multiple fourth link plates are assembled into a power transmission chain.Type: ApplicationFiled: May 20, 2014Publication date: December 4, 2014Applicant: JTEKT CORPORATIONInventors: Yasushi KADOTA, Shinji YASUHARA, Taizou WAKAYAMA
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Patent number: 8721484Abstract: In a reduction-transmission mechanism, a plurality of output members are arranged at such positions that a size that is the sum of a fitting clearance formed between an outer periphery of each output member and a corresponding one of needle roller bearings, a fitting clearance formed between the needle roller bearing and an inner periphery of an input member, which defines a corresponding one of a plurality of pin insertion holes, and a radial internal clearance in the needle roller bearing is smaller than a size that is the sum of a fitting clearance formed between a ball bearing and an outer periphery of an eccentric portion, a fitting clearance formed between the ball bearing and an inner periphery of the input member, which defines a center hole, and a radial internal clearance in the ball bearing.Type: GrantFiled: December 3, 2012Date of Patent: May 13, 2014Assignee: JTEKT CorporationInventors: Kunihiko Suzuki, Hiroshi Takuno, Keita Nomura, Kazutaka Matsukawa, Yasushi Kadota, Takeshi Yamamoto
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Patent number: 7905157Abstract: A housing has a screw shaft passing wall in which a through hole, through which a screw shaft passes, is formed. A spline outer cylinder is held at one end by the screw shaft passing wall, and a disc spring that biases the spline outer cylinder toward the screw shaft passing wall is arranged at the other end of the spline outer cylinder. A tapered recess is formed in one end face of the spline outer cylinder, and a tapered projection that is fitted in the tapered recess is formed in a face of the screw shaft passing wall of the housing, which faces the spline outer cylinder.Type: GrantFiled: January 14, 2009Date of Patent: March 15, 2011Assignee: JTEKT CorporationInventors: Yoshifumi Shige, Yasushi Kadota, Satoshi Kondo, Atsushi Sakuta
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Publication number: 20100135605Abstract: A core of a fixed-side sealing member has a fitting cylindrical part fitted with the fixed-side sealing member. An outer end portion of the fitting cylindrical part is insertion-molded to be disposed within a resin member. An outer edge portion of the fitting cylindrical part in an axial direction thereof is bent.Type: ApplicationFiled: July 2, 2008Publication date: June 3, 2010Inventors: Yasuhiko Ishii, Nobutsuna Motohashi, Yasushi Kadota
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Publication number: 20090193920Abstract: A housing has a screw shaft passing wall in which a through hole, through which a screw shaft passes, is formed. A spline outer cylinder is held at one end by the screw shaft passing wall, and a disc spring that biases the spline outer cylinder toward the screw shaft passing wall is arranged at the other end of the spline outer cylinder. A tapered recess is formed in one end face of the spline outer cylinder, and a tapered projection that is fitted in the tapered recess is formed in a face of the screw shaft passing wall of the housing, which faces the spline outer cylinder.Type: ApplicationFiled: January 14, 2009Publication date: August 6, 2009Applicant: JTEKT CorporationInventors: Yoshifumi Shige, Yasushi Kadota, Satoshi Kondo, Atsushi Sakuta
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Patent number: 5005541Abstract: A hydraulic valve lifter for use in an internal combustion engine, comprises an inverted cup-like body, an inverted cup-like plunger housed within the body, a high pressure chamber defined between the body and the plunger, and an oil passage through which an oil is fed to the high pressure chamber. At least one oil discharge hole is defined in the plunger and extends from the oil passage to open to a valve stem so as to lubricate between the valve stem and a valve guide.Type: GrantFiled: July 24, 1990Date of Patent: April 9, 1991Assignee: Otai Tekko Kabushiki Kaisha and Koyo Seiko Co., Ltd.Inventors: Takeomi Yamamoto, Nariaki Endo, Yasushi Kadota, Tadasu Yamakawa
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Patent number: 4934987Abstract: A belt tensioner comprising an intermediate annular member rotatably provided around a fixed member in the form of a solid cylinder and to be secured to a stationary portion, a movable eccentric member in the form of a solid cylinder and rotatably provided around the intermediate annular member eccentrically therewith, an idler in the form of a hollow cylinder and rotatably provided around the movable eccentric member for contact with a belt, and a spring provided between the stationary portion or the fixed member and the movable eccentric member for biasing the movable eccentric member in a direction to bring the idler into pressing contact with the belt. The intermediate annular member has a cylindrical or tapered first sliding surface in contact with the fixed member and a cylindrical or tapered second sliding surface in contact with the eccentric member.Type: GrantFiled: March 31, 1989Date of Patent: June 19, 1990Assignees: Koyo Seiko Co., Ltd., Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Yasushi Kadota, Sadakatsu Ushio
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Patent number: 4923435Abstract: A tensioner comprising a first cylindrical member to be fixedly attached to a stationary portion, a movable eccentric member in the form of a cylinder and eccentrically rotatably provided around the first member, an idler in the form of a hollow cylinder and rotatably provided around the movable eccentric member for contact with a wrapping connector driving member, and a spring provided between the stationary portion and the movable eccentric member for biasing the eccentric member in a direction to press the idler into contact with the wrapping connector driving member. A one-way clutch is provided between the first member and the movable eccentric member.Type: GrantFiled: November 16, 1988Date of Patent: May 8, 1990Assignee: Koyo Seiko Co., Ltd.Inventors: Yasushi Kadota, Yoshikazu Nishida
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Patent number: 4921470Abstract: A universal joint including an intermediate joint member having a spherical portion as assembled and four ridges formed on the outer surface of the spherical portion and defining four guide furrows therebetween, and two shaft each having one end bifurcating into two arms. The two arms of one of the shafts are fitted in two of the guide furrows positioned symmetrically, and the two arms of the other shaft are fitted in the other two guide furrows positioned symmetrically. The entire joint member comprises two divided half segments arranged in combination axially of the member.Type: GrantFiled: June 19, 1987Date of Patent: May 1, 1990Assignee: Koyo Seiko Co.Inventors: Hiroshi Kotani, Yoshiyuki Inoue, Yasushi Kadota, Hidekazu Sakakibara, Kazuo Ide, Kanichi Sumida
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Patent number: 4832665Abstract: A tensioner comprising a solid cylindrical fixed member to be fixedly attached to a stationary portion, a movable eccentric member in the form of a solid cylinder and eccentrically rotatably provided around the fixed member, an idler in the form of a hollow cylinder and rotatably provided around the movable eccentric member for contact with a wrapping connector driving member, and a spring provided between the stationary portion and the movable eccentric member for biasing the eccentric member in a direction to press the idler into contact with the wrapping connector driving member. A high-viscosity oil is provided in a clearance between the outer periphery of the fixed member and the inner periphery of the movable eccentric member.Type: GrantFiled: December 22, 1987Date of Patent: May 23, 1989Assignee: Koyo Seiko Co., Ltd.Inventors: Yasushi Kadota, Yoshikazu Nishida