Patents by Inventor Kenji Tatewaki
Kenji Tatewaki 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: 11781636Abstract: Provided is a gearbox for vehicle seats that can inhibit rattling of its shaft while inhibiting an increase in sliding resistance at a shaft end. The gearbox is used in a movable mechanism of a vehicle seat, and including a housing, a thrust bearing, and a cap. The housing accommodates a shaft, a gear, and a rotary bearing therein, and includes a female screw portion. The thrust bearing includes a force applied portion to be in contact with an end of the shaft, a male screw portion threadedly engaged with the female screw portion, and an engaged portion arranged to interpose the male screw portion between the engaged portion and the force applied portion in an axial direction of the shaft. The cap includes an engaging portion in engagement with the engaged portion of the thrust bearing, and a removal stopper restricting removal of the thrust bearing from the housing.Type: GrantFiled: April 5, 2023Date of Patent: October 10, 2023Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHAInventors: Kenji Tatewaki, Tomokazu Fukuda, Kentaro Morishita
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Patent number: 11261953Abstract: A gearbox includes: the first helical gear; the second helical gear to engage with the first helical gear; a casing including a first member disposed in proximity to the first helical gear and a second member disposed in proximity to the second helical gear; a screw for fastening the first member with the second member, and disposed closer to the first helical gear than an engagement position between the first helical gear and the second helical gear and penetrating at least the second member; and a clip disposed closer to the second helical gear than the engagement position, and formed of a closed curve in such a manner that the first member end and the second member end are enclosed therein.Type: GrantFiled: August 20, 2020Date of Patent: March 1, 2022Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHAInventors: Yuki Kuroda, Toshiharu Kiriyama, Kenji Tatewaki
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Publication number: 20210062907Abstract: Disclosed is a gearbox enabling to inhibit defective engagement between a first helical gear and a second helical gear even when a restraint torque is applied. The gearbox includes: the first helical gear; the second helical gear to engage with the first helical gear; a casing including a first member disposed in proximity to the first helical gear and a second member disposed in proximity to the second helical gear; a screw for fastening the first member with the second member, and disposed closer to the first helical gear than an engagement position between the first helical gear and the second helical gear and penetrating at least the second member; and a clip disposed closer to the second helical gear than the engagement position, and formed of a closed curve in such a manner that the first member end and the second member end are enclosed therein.Type: ApplicationFiled: August 20, 2020Publication date: March 4, 2021Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHAInventors: Yuki KURODA, Toshiharu KIRIYAMA, Kenji TATEWAKI
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Patent number: 10293727Abstract: A headrest in one aspect of the present disclosure comprises a first frame member, a second frame member, a displacement mechanism configured to displace the second frame member with respect to the first frame member, a first guide shaft, and a second guide shaft arranged at a position shifted in a substantially vertical direction and in a substantially horizontal direction with respect to the first guide shaft.Type: GrantFiled: May 16, 2017Date of Patent: May 21, 2019Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHAInventors: Kenji Tatewaki, Tatsuyuki Morishita, Masatoshi Mori, Hiroki Toyoshima
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Patent number: 10266089Abstract: A headrest in one aspect of the present disclosure comprises a first frame member, a second frame member, a displacement mechanism to displace the second frame member with respect to the first frame member, a first guide shaft, a first bearing portion through which the first guide shaft is inserted, a second guide shaft, a second bearing portion through which the second guide shaft is inserted, a first fixing portion that comprises a first insertion hole into which one end of the first guide shaft is inserted, and a second fixing portion that comprises a second insertion hole into which one end of the second guide shaft is inserted.Type: GrantFiled: May 18, 2017Date of Patent: April 23, 2019Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHAInventors: Kenji Tatewaki, Tatsuyuki Morishita, Masatoshi Mori, Hiroki Toyoshima
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Publication number: 20170341546Abstract: A headrest in one aspect of the present disclosure comprises a first frame member, a second frame member, a displacement mechanism configured to displace the second frame member with respect to the first frame member, a first guide shaft, and a second guide shaft arranged at a position shifted in a substantially vertical direction and in a substantially horizontal direction with respect to the first guide shaft.Type: ApplicationFiled: May 16, 2017Publication date: November 30, 2017Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHAInventors: Kenji TATEWAKI, Tatsuyuki MORISHITA, Masatoshi MORI, Hiroki TOYOSHIMA
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Publication number: 20170341547Abstract: A headrest in one aspect of the present disclosure comprises a first frame member, a second frame member, a displacement mechanism to displace the second frame member with respect to the first frame member, a first guide shaft, a first bearing portion through which the first guide shaft is inserted, a second guide shaft, a second bearing portion through which the second guide shaft is inserted, a first fixing portion that comprises a first insertion hole into which one end of the first guide shaft is inserted, and a second fixing portion that comprises a second insertion hole into which one end of the second guide shaft is inserted.Type: ApplicationFiled: May 18, 2017Publication date: November 30, 2017Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHAInventors: Kenji TATEWAKI, Tatsuyuki MORISHITA, Masatoshi MORI, Hiroki TOYOSHIMA
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Patent number: 9694724Abstract: A vehicular seat slide device, includes: a first rail fixed to one of a vehicular floor and a seat; a second rail fixed to the other one of the floor and the seat, and linked to be movable relative to the first rail; a screw rod supported by the second rail to be rotatable around an axial line which extends in a moving direction; a metal case fixed to the first rail, and through which the screw rod is inserted; a resin nut housed in the metal case in a state of being unmovable in the moving direction with respect to the metal case, and screwed to the screw rod; and a metal nut housed in the metal case in a state of not being in contact with the resin nut in the moving direction, and screwed to the screw rod.Type: GrantFiled: April 17, 2015Date of Patent: July 4, 2017Assignee: AISIN SEIKI KABUSHIKI KAISHAInventors: Toshiaki Nagata, Hiroyuki Okazaki, Kenji Tatewaki, Yuki Kuroda
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Publication number: 20150298581Abstract: A vehicular seat slide device, includes: a first rail fixed to one of a vehicular floor and a seat; a second rail fixed to the other one of the floor and the seat, and linked to be movable relative to the first rail; a screw rod supported by the second rail to be rotatable around an axial line which extends in a moving direction; a metal case fixed to the first rail, and through which the screw rod is inserted; a resin nut housed in the metal case in a state of being unmovable in the moving direction with respect to the metal case, and screwed to the screw rod; and a metal nut housed in the metal case in a state of not being in contact with the resin nut in the moving direction, and screwed to the screw rod.Type: ApplicationFiled: April 17, 2015Publication date: October 22, 2015Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Toshiaki NAGATA, Hiroyuki OKAZAKI, Kenji TATEWAKI, Yuki KURODA
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Publication number: 20100288903Abstract: A screw configuration of a seat apparatus for a vehicle includes a screw member axially rotatably supported at one of a lower rail adapted to be mounted on a floor of the vehicle and an upper rail slidably supported at the lower rail and adapted to support a seat for the vehicle, extending in a sliding direction of the upper rail, including a protruding portion configured by two raised portions formed to be raised at an outer circumferential surface of the screw member from both sides in an axial direction of the screw member by cold rolling so as to be coupled and to contact each other, and positioned in the axial direction of the screw member by means of the protruding portion, and a transmitting nut member fixed to the other one of the lower rail and the upper rail so that the screw member is screwed there through.Type: ApplicationFiled: March 30, 2010Publication date: November 18, 2010Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Yoshitaka KOGA, Hirokazu Suzumura, Jueru Shimizu, Kenji Tatewaki