Patents by Inventor Naoko SAKAGUCHI
Naoko SAKAGUCHI 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: 11125308Abstract: In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.Type: GrantFiled: December 21, 2017Date of Patent: September 21, 2021Assignee: JTEKT CORPORATIONInventors: Gento Aramoto, Naoko Sakaguchi
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Patent number: 10883582Abstract: In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.Type: GrantFiled: October 17, 2018Date of Patent: January 5, 2021Assignee: JTEKT CORPORATIONInventors: Gento Aramoto, Naoko Sakaguchi
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Patent number: 10683919Abstract: In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.Type: GrantFiled: December 21, 2017Date of Patent: June 16, 2020Assignee: JTEKT CORPORATIONInventors: Gento Aramoto, Naoko Sakaguchi
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Patent number: 10352418Abstract: In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.Type: GrantFiled: July 23, 2015Date of Patent: July 16, 2019Assignee: JTEKT CORPORATIONInventors: Gento Aramoto, Naoko Sakaguchi
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Publication number: 20190048982Abstract: In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.Type: ApplicationFiled: October 17, 2018Publication date: February 14, 2019Applicant: JTEKT CORPORATIONInventors: Gento ARAMOTO, Naoko SAKAGUCHI
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Publication number: 20180128358Abstract: In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.Type: ApplicationFiled: December 21, 2017Publication date: May 10, 2018Applicant: JTEKT CORPORATIONInventors: Gento ARAMOTO, Naoko SAKAGUCHI
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Publication number: 20180112752Abstract: In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.Type: ApplicationFiled: December 21, 2017Publication date: April 26, 2018Applicant: JTEKT CORPORATIONInventors: Gento ARAMOTO, Naoko SAKAGUCHI
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Patent number: 9416856Abstract: A ball screw device includes a cylinder that surrounds the outer periphery of a ball nut. Accommodation holes are formed in the ball nut at a rolling start position and a rolling end position in ball rolling paths. An outer periphery turning groove is formed in an outer peripheral face of the ball nut, and the outer periphery turning groove and an inner peripheral face of the cylinder constitute a turning rolling path. The turning rolling path and connection passages formed in deflectors constitute a circulation path through which balls are returned from the rolling end position to the rolling start position.Type: GrantFiled: March 12, 2014Date of Patent: August 16, 2016Assignee: JTEKT CORPORATIONInventors: Naoko Sakaguchi, Akiyoshi Tashiro
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Publication number: 20160033019Abstract: In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.Type: ApplicationFiled: July 23, 2015Publication date: February 4, 2016Inventors: Gento ARAMOTO, Naoko SAKAGUCHI
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Publication number: 20150033891Abstract: A ball screw device includes a screw shaft; a ball nut; a first deflector fitted to an end portion of the ball nut; a ball guide portion that guides balls positioned in a helical inner ball passage formed by the ball nut and the screw shaft, to a first end portion ball passage in the first deflector; the balls that are set to form a row extending in the inner ball passage and the first end portion ball passage; and a first elastic member having a base end that is positioned in the first end portion ball passage and a distal end that is disposed and accommodated in the first end portion ball passage so as to be able to contact the ball positioned at one end of the row of the balls.Type: ApplicationFiled: July 29, 2014Publication date: February 5, 2015Inventors: Naoko SAKAGUCHI, Katsura KOYAGI
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Publication number: 20150027258Abstract: A ball screw device includes a piston that surrounds the outer periphery of a ball nut. An outer periphery turning groove is formed in the outer peripheral face of the ball nut. The outer periphery turning groove and the inner peripheral face of a cylindrical portion of the piston constitute a turning rolling path. The turning rolling path and connection passages of deflectors constitute a returning path through which balls are returned from a rolling end position to a rolling start position. An internally-fitting portion is formed at one end portion of the ball nut in the axial direction. When the outer periphery of the internally-fitting portion and the inner periphery of the cylindrical portion are fitted to each other, relative rotation of the ball nut and the piston is prevented.Type: ApplicationFiled: July 18, 2014Publication date: January 29, 2015Inventors: Katsura KOYAGI, Akiyoshi TASHIRO, Naoko SAKAGUCHI
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Publication number: 20140260746Abstract: A ball screw device includes a cylinder that surrounds the outer periphery of a ball nut. Accommodation holes are formed in the ball nut at a rolling start position and a rolling end position in ball rolling paths. An outer periphery turning groove is formed in an outer peripheral face of the ball nut, and the outer periphery turning groove and an inner peripheral face of the cylinder constitute a turning rolling path. The turning rolling path and connection passages formed in deflectors constitute a circulation path through which balls are returned from the rolling end position to the rolling start position.Type: ApplicationFiled: March 12, 2014Publication date: September 18, 2014Applicant: JTEKT CORPORATIONInventors: Naoko SAKAGUCHI, Akiyoshi TASHIRO