Patents by Inventor Nakatsune Shirai
Nakatsune Shirai 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: 11047433Abstract: This clutch includes an annular clutch housing, a rotationally driven drive-side rotating body, a driven-side rotating body, a rolling body, and a support member. The clutch is configured such that, when the drive-side rotating body starts to rotate when driven, the drive-side rotating body comes into contact with the support member in a rotational direction and presses the rolling body in the rotational direction through the support member, thereby releasing the rolling body from gripping effected by the clutch housing and the driven-side rotating body. The support member includes a load generation section for generating a load which makes it difficult for the support member to rotate about the rotation axis of the drive-side rotating body when at least the drive-side rotating body starts to rotate when driven.Type: GrantFiled: March 9, 2018Date of Patent: June 29, 2021Assignee: DENSO CORPORATIONInventors: Ryosuke Oguri, Shusuke Kijima, Tetsuya Honda, Yoshio Aoki, Hiroyuki Okada, Kenta Suzuki, Nakatsune Shirai, Daisuke Sawamoto, Tomoaki Ozaki
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Patent number: 11002322Abstract: A clutch includes a roller arranged between a clutch housing and a driven side rotating body. The roller is rotated about a rotation axis of a drive side rotating body together with the drive side rotating body when the drive side rotating body is rotationally driven. The roller hinders rotation of the driven side rotating body by being sandwiched between the clutch housing and the driven side rotating body when the drive side rotating body is not rotationally driven. The support member sandwiches the roller between the clutch housing and the driven side rotating body. The support member rotates about the rotation axis of the drive side rotating body together with the drive side rotating body. The grease is arranged between the clutch housing and the roller. The support member restricts rotation of the roller about a central axis of the roller.Type: GrantFiled: September 14, 2017Date of Patent: May 11, 2021Assignee: DENSO CORPORATIONInventors: Ryousuke Oguri, Nakatsune Shirai, Tomoaki Ozaki, Shusuke Kijima, Kenta Suzuki, Daisuke Sawamoto, Akiyoshi Ohara, Hiroyuki Okada
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Patent number: 10597926Abstract: A clutch is configured, when a driving-side rotor is in a non-driven-rotated state, to prevent rotation of a driven-side rotor by setting a rolling element in a lock state in which the rolling element is held by a control surface and a collar. The clutch is configured so that when the driving-side rotor is driven and rotated in the lock state, the driving-side rotor pushes the rolling element via two circumferential holders in a rotation direction to release the rolling element from the lock state. Each of the two circumferential holders includes a guide portion configured to guide the rolling element toward a radially inner side of the collar when the rolling element is released from the lock state.Type: GrantFiled: March 13, 2017Date of Patent: March 24, 2020Assignee: DENSO CORPORATIONInventors: Nakatsune Shirai, Hiroyuki Okada, Kenta Suzuki
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Publication number: 20190331175Abstract: This clutch includes an annular clutch housing, a rotationally driven drive-side rotating body, a driven-side rotating body, a rolling body, and a support member. The clutch is configured such that, when the drive-side rotating body starts to rotate when driven, the drive-side rotating body comes into contact with the support member in a rotational direction and presses the rolling body in the rotational direction through the support member, thereby releasing the rolling body from gripping effected by the clutch housing and the driven-side rotating body. The support member includes a load generation section for generating a load which makes it difficult for the support member to rotate about the rotation axis of the drive-side rotating body when at least the drive-side rotating body starts to rotate when driven.Type: ApplicationFiled: March 9, 2018Publication date: October 31, 2019Applicant: DENSO CORPORATIONInventors: Ryosuke OGURI, Shusuke KIJIMA, Tetsuya HONDA, Yoshio AOKI, Hiroyuki OKADA, Kenta SUZUKI, Nakatsune SHIRAI, Daisuke SAWAMOTO, Tomoaki OZAKI
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Publication number: 20190162248Abstract: A clutch includes a roller arranged between a clutch housing and a driven side rotating body. The roller is rotated about a rotation axis of a drive side rotating body together with the drive side rotating body when the drive side rotating body is rotationally driven. The roller hinders rotation of the driven side rotating body by being sandwiched between the clutch housing and the driven side rotating body when the drive side rotating body is not rotationally driven. The support member sandwiches the roller between the clutch housing and the driven side rotating body. The support member rotates about the rotation axis of the drive side rotating body together with the drive side rotating body. The grease is arranged between the clutch housing and the roller. The support member restricts rotation of the roller about a central axis of the roller.Type: ApplicationFiled: September 14, 2017Publication date: May 30, 2019Applicant: DENSO CORPORATIONInventors: Ryousuke OGURI, Nakatsune SHIRAI, Tomoaki OZAKI, Shusuke KIJIMA, Kenta SUZUKI, Daisuke SAWAMOTO, Akiyoshi OHARA, Hiroyuki OKADA
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Publication number: 20190093415Abstract: A clutch is configured, when a driving-side rotor is in a non-driven-rotated state, to prevent rotation of a driven-side rotor by setting a rolling element in a lock state in which the rolling element is held by a control surface and a collar. The clutch is configured so that when the driving-side rotor is driven and rotated in the lock state, the driving-side rotor pushes the rolling element via two circumferential holders in a rotation direction to release the rolling element from the lock state. Each of the two circumferential holders includes a guide portion configured to guide the rolling element toward a radially inner side of the collar when the rolling element is released from the lock state.Type: ApplicationFiled: March 13, 2017Publication date: March 28, 2019Inventors: Nakatsune SHIRAI, Hiroyuki OKADA, Kenta SUZUKI
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Patent number: 9252646Abstract: A motor includes a rotation shaft, a commutator, power supply brushes, and a brush holder. The brush holder includes an opposing portion that faces an end face of the commutator in an axial direction, a bearing holder, and a diffusion stopper. The diffusion stopper is arranged in a portion of the opposing portion located toward the outer side in the radial direction from the bearing holder and limits the diffusion of abrasion powder of the power supply brushes. The diffusion stopper is projected toward the commutator in the axial direction or recessed in the axial direction.Type: GrantFiled: April 16, 2014Date of Patent: February 2, 2016Assignee: Asmo Co., Ltd.Inventors: Ryousuke Oguri, Yousuke Kanbe, Tomoki Yamashita, Hiroaki Honma, Nakatsune Shirai
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Patent number: 8951131Abstract: A rotation transmission device transmits the rotation force to an output shaft. The rotation transmission device includes a rotation body and a buffer mechanism. The rotation body includes a plurality of engagement portions. The buffer mechanism includes an elastic member and a transmission plate. The elastic member includes multiple pairs of damper portions. Each pair of damper portions is arranged to contact two side surfaces of one of the engagement portions. The transmission plate includes an output connection portion, a planar portion, and a plurality of engagement pieces. The output connection portion is connected to the output shaft. The engagement pieces are bent from the planar portion to project in an axial direction. Each of the engagement pieces cooperate with one of the engagement portions to sandwich each of the damper portions in the circumferential direction.Type: GrantFiled: December 8, 2011Date of Patent: February 10, 2015Assignee: Asmo Co., Ltd.Inventor: Nakatsune Shirai
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Publication number: 20140312731Abstract: A motor includes a rotation shaft, a commutator, power supply brushes, and a brush holder. The brush holder includes an opposing portion that faces an end face of the commutator in an axial direction, a bearing holder, and a diffusion stopper. The diffusion stopper is arranged in a portion of the opposing portion located toward the outer side in the radial direction from the bearing holder and limits the diffusion of abrasion powder of the power supply brushes. The diffusion stopper is projected toward the commutator in the axial direction or recessed in the axial direction.Type: ApplicationFiled: April 16, 2014Publication date: October 23, 2014Inventors: Ryousuke OGURI, Yousuke KANBE, Tomoki YAMASHITA, Hiroaki HONMA, Nakatsune SHIRAI
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Publication number: 20130252745Abstract: A rotation transmission device transmits the rotation force to an output shaft. The rotation transmission device includes a rotation body and a buffer mechanism. The rotation body includes a plurality of engagement portions. The buffer mechanism includes an elastic member and a transmission plate. The elastic member includes multiple pairs of damper portions. Each pair of damper portions is arranged to contact two side surfaces of one of the engagement portions. The transmission plate includes an output connection portion, a planar portion, and a plurality of engagement pieces. The output connection portion is connected to the output shaft. The engagement pieces are bent from the planar portion to project in an axial direction. Each of the engagement pieces cooperate with one of the engagement portions to sandwich each of the damper portions in the circumferential direction.Type: ApplicationFiled: December 8, 2011Publication date: September 26, 2013Applicant: ASMO CO., LTDInventor: Nakatsune Shirai
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Patent number: 8429995Abstract: An output power transmission device has a transmission plate and a C-ring. The transmission plate is attached to a wheel gear in an axial direction of the wheel gear such that the transmission plate directly engages with the wheel gear in a rotation direction. The transmission plate functions as a transmission member for transmitting rotation of the wheel gear to an output shaft. The C-ring is provided at a position where the C-ring sandwiches the transmission plate with the wheel gear in the axial direction. The C-ring functions as a restriction section for restricting movement of the transmission plate in the axial direction opposite from the wheel gear side. An elastic claw section as a pressing member is formed on the wheel gear. The elastic claw section presses the transmission plate against the C-ring in the axial direction.Type: GrantFiled: June 30, 2009Date of Patent: April 30, 2013Assignee: ASMO Co., Ltd.Inventors: Tomoki Yamashita, Hiroaki Yamamoto, Hidenori Ishihara, Hiroshi Kokubu, Nakatsune Shirai, Katsumi Endo
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Patent number: 8138646Abstract: At the time of assembling an electric motor, plain bearings are installed over a worm shaft to form a shaft assembly. Then, the worm shaft together with the plain bearings is inserted into a gear housing in an inserting direction, which is generally parallel to an axial direction of the worm shaft, such that each of the plain bearings is press fitted into a corresponding installation part of the housing.Type: GrantFiled: December 16, 2008Date of Patent: March 20, 2012Assignee: ASMO Co., Ltd.Inventors: Nakatsune Shirai, Hidenori Ishihara, Tomoki Yamashita, Hiroaki Yamamoto, Katsumi Endo
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Patent number: 8127898Abstract: A brake device arranged between a drive shaft and a driven shaft arranged coaxially with the drive shaft is disclosed. The brake device includes a first rotor, a second rotor, an engagement member, a braking mechanism, and a cam mechanism. The braking mechanism includes a movable friction member rotatable integrally with the second rotor, a fixed friction portion, and an urging member that urges the movable friction member toward the fixed friction portion. When rotational force is provided from the drive shaft to the first rotor, the cam mechanism permits transmission of rotation of the drive shaft to the driven shaft. When the rotational force is provided from the driven shaft to the second rotor, the cam mechanism restricts rotation of the driven shaft. The cam mechanism is provided independently from the engagement member.Type: GrantFiled: December 10, 2008Date of Patent: March 6, 2012Assignee: Asmo Co., Ltd.Inventors: Hiroaki Yamamoto, Katsuhiko Torii, Hidenori Ishihara, Tomoki Yamashita, Nakatsune Shirai, Katsumi Endo
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Patent number: 8061083Abstract: A drive apparatus for opening and closing a window glass provided in a door having an inner panel is disclosed. The drive apparatus includes a motor provided in the door and a regulator that receives drive force from the motor and selectively open and close the window glass. The door noise includes motor operating noise and vibration transmission noise that is generated when vibration of the motor is transmitted to the inner panel via the regulator. The motor is configured such that a first-order frequency component in vibration of the motor is greater than any other nth component (n is an integer greater than or equal to two), so that the first-order frequency component in the door noise is greater than any other nth frequency component (n is an integer greater than or equal to two).Type: GrantFiled: January 27, 2009Date of Patent: November 22, 2011Assignee: Asmo Co., Ltd.Inventors: Nakatsune Shirai, Hidenori Ishihara, Tomoki Yamashita, Hiroaki Yamamoto, Katsumi Endo
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Patent number: 8049445Abstract: A motor controller that outputs a drive signal to a direct-current motor to drive the motor is provided. The motor controller includes a drive circuit that generates the drive signal. The drive circuit superimposes on a direct-current voltage an alternating-current component having a frequency in the audible frequency range of the human ear, thereby generating the drive signal.Type: GrantFiled: December 17, 2008Date of Patent: November 1, 2011Assignee: Asmo Co., Ltd.Inventors: Hidenori Ishihara, Hiroaki Yamamoto, Nakatsune Shirai, Katsumi Endo, Tomoki Yamashita
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Publication number: 20100000355Abstract: An output power transmission device has a transmission plate and a C-ring. The transmission plate is attached to a wheel gear in an axial direction of the wheel gear such that the transmission plate directly engages with the wheel gear in a rotation direction. The transmission plate functions as a transmission member for transmitting rotation of the wheel gear to an output shaft. The C-ring is provided at a position where the C-ring sandwiches the transmission plate with the wheel gear in the axial direction. The C-ring functions as a restriction section for restricting movement of the transmission plate in the axial direction opposite from the wheel gear side. An elastic claw section as a pressing member is formed on the wheel gear. The elastic claw section presses the transmission plate against the C-ring in the axial direction.Type: ApplicationFiled: June 30, 2009Publication date: January 7, 2010Applicant: ASMO CO., LTD.Inventors: Tomoki Yamashita, Hiroaki Yamamoto, Hidenori Ishihara, Hiroshi Kokubu, Nakatsune Shirai, Katsumi Endo
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Publication number: 20090195099Abstract: At the time of assembling an electric motor, plain bearings are installed over a worm shaft to form a shaft assembly. Then, the worm shaft together with the plain bearings is inserted into a gear housing in an inserting direction, which is generally parallel to an axial direction of the worm shaft, such that each of the plain bearings is press fitted into a corresponding installation part of the housing.Type: ApplicationFiled: December 16, 2008Publication date: August 6, 2009Applicant: ASMO CO., LTD.Inventors: Nakatsune Shirai, Hidenori Ishihara, Tomoki Yamashita, Hiroaki Yamamoto, Katsumi Endo
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Publication number: 20090188168Abstract: A drive apparatus for opening and closing a window glass provided in a door having an inner panel is disclosed. The drive apparatus includes a motor provided in the door and a regulator that receives drive force from the motor and selectively open and close the window glass. The door noise includes motor operating noise and vibration transmission noise that is generated when vibration of the motor is transmitted to the inner panel via the regulator. The motor is configured such that a first-order frequency component in vibration of the motor is greater than any other nth component (n is an integer greater than or equal to two), so that the first-order frequency component in the door noise is greater than any other nth frequency component (n is an integer greater than or equal to two).Type: ApplicationFiled: January 27, 2009Publication date: July 30, 2009Applicant: ASMO CO., LTD.Inventors: Nakatsune SHIRAI, Hidenori ISHIHARA, Tomoki YAMASHITA, Hiroaki YAMAMOTO, Katsumi ENDO
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Publication number: 20090152057Abstract: A brake device arranged between a drive shaft and a driven shaft arranged coaxially with the drive shaft is disclosed. The brake device includes a first rotor, a second rotor, an engagement member, a braking mechanism, and a cam mechanism. The braking mechanism includes a movable friction member rotatable integrally with the second rotor, a fixed friction portion, and an urging member that urges the movable friction member toward the fixed friction portion. When rotational force is provided from the drive shaft to the first rotor, the cam mechanism permits transmission of rotation of the drive shaft to the driven shaft. When the rotational force is provided from the driven shaft to the second rotor, the cam mechanism restricts rotation of the driven shaft. The cam mechanism is provided independently from the engagement member.Type: ApplicationFiled: December 10, 2008Publication date: June 18, 2009Applicant: ASMO CO., LTD.Inventors: Hiroaki Yamamoto, Katsuhiko Torii, Hidenori Ishihara, Tomoki Yamashita, Nakatsune Shirai, Katsumi Endo
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Publication number: 20090153090Abstract: A motor controller that outputs a drive signal to a direct-current motor to drive the motor is provided. The motor controller includes a drive circuit that generates the drive signal. The drive circuit superimposes on a direct-current voltage an alternating-current component having a frequency in the audible frequency range of the human ear, thereby generating the drive signal.Type: ApplicationFiled: December 17, 2008Publication date: June 18, 2009Applicant: ASMO CO., LTD.Inventors: Hidenori ISHIHARA, Hiroaki YAMAMOTO, Nakatsune SHIRAI, Katsumi ENDO, Tomoki YAMASHITA