Patents by Inventor Hidehisa Tomizawa
Hidehisa Tomizawa 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: 10086666Abstract: A coupling structure for vehicle chassis members couples a ball joint member and an axle housing used for a vehicle to each other. The structure includes a socket that has a substantially columnar external shape, is provided in the ball joint member, and has a socket bolt groove throughout a circumference in an outer circumferential surface of the socket. The structure also includes a collar that has a substantially cylindrical shape and is disposed so as to surround an outer circumferential surface of the socket. The axle housing has a coupling hole having a substantially columnar internal shape into which the socket is inserted. The ball joint member and the axle housing are coupled to each other by disposing the socket in the coupling hole while the socket is surrounded by the collar.Type: GrantFiled: September 21, 2015Date of Patent: October 2, 2018Assignee: SUBARU CORPORATIONInventors: Hidehisa Tomizawa, Toshi Ishida, Hajime Terasaki, Yoshiaki Utsugi, Masaru Kogure, Yuichiro Tsukasaki, Toshiyuki Hyuga, Noritaka Hayashi, Kensuke Ohshima
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Patent number: 9481391Abstract: An electric power steering apparatus includes steering mechanisms that direct left and right front wheels of a vehicle equipped with the electric power steering apparatus according to rotation of a steering shaft to which a steering wheel is coupled, a first motor and a second motor that give an assist torque to the steering mechanisms, and a controller that controls the assist torques generated by the first motor and the second motor. The controller causes the first motor to generate the torque in a direction of the steering operation when a generation of the assist torque is started. The controller causes the second motor to generate the torque after a rotation of the first motor is detected. The torque of the second motor is smaller than the torque of the first motor and opposite from the direction of the steering operation.Type: GrantFiled: September 23, 2015Date of Patent: November 1, 2016Assignee: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Hidehisa Tomizawa, Toshi Ishida
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Patent number: 9475518Abstract: A steering device includes: a rack; a pinion; a pinion shaft having the pinion on an outer circumferential surface thereof; a rack shaft having the rack that engages with the pinion; a rack guide that is provided on a side of the rack shaft opposite from the pinion shaft and guides the rack shaft along an axis of the rack shaft; a biasing member that biases the rack guide against the rack shaft to press the rack against the pinion; a guide housing that accommodates the rack guide and the biasing member; and a buffer member provided between an outer circumferential surface of the rack guide and an inner circumferential surface of the guide housing. The buffer member has a cylindrical member and an elastic member. The elastic member is disposed on at least either one of an inner circumferential surface and an outer circumferential surface of the cylindrical member.Type: GrantFiled: March 3, 2015Date of Patent: October 25, 2016Assignee: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Hidehisa Tomizawa, Toshi Ishida, Hiroyuki Ooiwa, Mitsuharu Minami
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Patent number: 9321322Abstract: In a sub-frame module that is used to attach a set of left and right wheels in pair to a vehicle body, a sub-frame attached to the vehicle body and left and right hub carriers, to which the left and right wheels in pair are attached, are connected by left and right link arms to be capable of swinging. A stabilizer is laid across the left and right rear link arms, and a holder that holds the stabilizer is supported by an vehicle body side member that is provided in a bush attached to the vehicle body. The holder is fixed to the vehicle body by attaching the vehicle body side member to the vehicle body.Type: GrantFiled: March 26, 2015Date of Patent: April 26, 2016Assignee: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Hidehisa Tomizawa, Toshi Ishida, Yoshiaki Utsugi, Kazuya Ando, Masaru Kogure, Toshiyuki Hyuga, Kensuke Ohshima, Naoto Yabuki, Hiromi Tamou
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Publication number: 20160090119Abstract: An electric power steering apparatus includes steering mechanisms that direct left and right front wheels of a vehicle equipped with the electric power steering apparatus according to rotation of a steering shaft to which a steering wheel is coupled, a first motor and a second motor that give an assist torque to the steering mechanisms, and a controller that controls the assist torques generated by the first motor and the second motor. The controller causes the first motor to generate the torque in a direction of the steering operation when a generation of the assist torque is started. The controller causes the second motor to generate the torque after a rotation of the first motor is detected. The torque of the second motor is smaller than the torque of the first motor and opposite from the direction of the steering operation.Type: ApplicationFiled: September 23, 2015Publication date: March 31, 2016Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Hidehisa TOMIZAWA, Toshi ISHIDA
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Publication number: 20160089943Abstract: A coupling structure for vehicle chassis members couples a ball joint member and an axle housing used for a vehicle to each other. The structure includes a socket that has a substantially columnar external shape, is provided in the ball joint member, and has a socket bolt groove throughout a circumference in an outer circumferential surface of the socket. The structure also includes a collar that has a substantially cylindrical shape and is disposed so as to surround an outer circumferential surface of the socket. The axle housing has a coupling hole having a substantially columnar internal shape into which the socket is inserted. The ball joint member and the axle housing are coupled to each other by disposing the socket in the coupling hole while the socket is surrounded by the collar.Type: ApplicationFiled: September 21, 2015Publication date: March 31, 2016Inventors: Hidehisa TOMIZAWA, Toshi ISHIDA, Hajime TERASAKI, Yoshiaki UTSUGI, Masaru KOGURE, Yuichiro TSUKASAKI, Toshiyuki HYUGA, Noritaka HAYASHI, Kensuke OHSHIMA
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Patent number: 9193388Abstract: A suspension device has longitudinal force compliance steer properties to steer a rear wheel to toe-in or toe-out according to increase in longitudinal force applied to wheel treads of a rear wheel. The suspension device includes: a hub bearing housing; suspension links having both edges pivotally attached to a vehicle body and a hub bearing respectively, to support the hub bearing housing; a suspension spring generating reaction force corresponding to relative displacement amount in the longitudinal direction of the hub bearing housing as to the vehicle body; a damper generating damping force corresponding to relative speed in the longitudinal direction of the hub bearing housing as to the vehicle body; and a toe change generating unit generating toe change in a direction where toe change due to longitudinal force compliance properties is temporarily cancelled out or suppressed at an early stage of turning of the vehicle.Type: GrantFiled: March 27, 2014Date of Patent: November 24, 2015Assignee: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Masaru Kogure, Yuichiro Tsukasaki, Masahiro Saito, Kazuya Morota, Kenji Watanuki, Toshiyuki Hyuga, Daisuke Yamada, Kensuke Ohshima, Yoshiaki Utsugi, Masato Nakatake, Takashi Kogure, Kazuya Ando, Hidehisa Tomizawa, Masashi Imoto, Toshi Ishida
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Publication number: 20150273973Abstract: In a sub-frame module that is used to attach a set of left and right wheels in pair to a vehicle body, a sub-frame attached to the vehicle body and left and right hub carriers, to which the left and right wheels in pair are attached, are connected by left and right link arms to be capable of swinging. A stabilizer is laid across the left and right rear link arms, and a holder that holds the stabilizer is supported by an vehicle body side member that is provided in a bush attached to the vehicle body. The holder is fixed to the vehicle body by attaching the vehicle body side member to the vehicle body.Type: ApplicationFiled: March 26, 2015Publication date: October 1, 2015Applicant: Fuji Jukogyo Kabushiki KaishaInventors: Hidehisa TOMIZAWA, Toshi ISHIDA, Yoshiaki UTSUGI, Kazuya ANDO, Masaru KOGURE, Toshiyuki HYUGA, Kensuke OHSHIMA, Naoto YABUKI, Hiromi TAMOU
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Publication number: 20150251686Abstract: A steering device includes: a rack; a pinion; a pinion shaft having the pinion on an outer circumferential surface thereof; a rack shaft having the rack that engages with the pinion; a rack guide that is provided on a side of the rack shaft opposite from the pinion shaft and guides the rack shaft along an axis of the rack shaft; a biasing member that biases the rack guide against the rack shaft to press the rack against the pinion; a guide housing that accommodates the rack guide and the biasing member; and a buffer member provided between an outer circumferential surface of the rack guide and an inner circumferential surface of the guide housing. The buffer member has a cylindrical member and an elastic member. The elastic member is disposed on at least either one of an inner circumferential surface and an outer circumferential surface of the cylindrical member.Type: ApplicationFiled: March 3, 2015Publication date: September 10, 2015Inventors: Hidehisa TOMIZAWA, Toshi ISHIDA, Hiroyuki OOIWA, Mitsuharu MINAMI
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Publication number: 20140291944Abstract: A suspension device has longitudinal force compliance steer properties to steer a rear wheel to toe-in or toe-out according to increase in longitudinal force applied to wheel treads of a rear wheel. The suspension device includes: a hub bearing housing; suspension links having both edges pivotally attached to a vehicle body and a hub bearing respectively, to support the hub bearing housing; a suspension spring generating reaction force corresponding to relative displacement amount in the longitudinal direction of the hub bearing housing as to the vehicle body; a damper generating damping force corresponding to relative speed in the longitudinal direction of the hub bearing housing as to the vehicle body; and a toe change generating unit generating toe change in a direction where toe change due to longitudinal force compliance properties is temporarily cancelled out or suppressed at an early stage of turning of the vehicle.Type: ApplicationFiled: March 27, 2014Publication date: October 2, 2014Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Masaru KOGURE, Yuichiro TSUKASAKI, Masahiro SAITO, Kazuya MOROTA, Kenji WATANUKI, Toshiyuki HYUGA, Daisuke YAMADA, Kensuke OHSHIMA, Yoshiaki UTSUGI, Masato NAKATAKE, Takashi KOGURE, Kazuya ANDO, Hidehisa TOMIZAWA, Masashi IMOTO, Toshi ISHIDA
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Patent number: 6328656Abstract: A vehicular propeller shaft having a hollow shaft, a bellows section integrally connected with said hollow pipe and a universal joint, the bellows section comprises a small diameter section, a large diameter section whose diameter is larger than the small diameter section, a plurality of swelling sections partially, outwardly swelled, having an enlarged diameter and a trapezoid cross section, annularly shaped around the hollow pipe, and consecutively disposed between said small diameter section and said large diameter section and a valley section having a reduced diameter, annularly shaped and disposed between two adjacent swelling sections.Type: GrantFiled: March 28, 2000Date of Patent: December 11, 2001Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Koichi Uchikawa, Hidehisa Tomizawa
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Patent number: 5526861Abstract: A tire inflation pressure sensor mounted on the outside of the wheel. The sensor housing includes a diaphragm, a cylinder, a magnet holder, a spring, a magnet holding member connected with a magnet, a guide member and a stopper. When the inflation pressure of a tire is normal, the magnet holding member stops at a position where the magnet indicates a north pole. When the inflation pressure goes down below a specified value, the magnet holding member travels a predetermined distance and at the same time the magnet holding member rotates at a predetermined angle indicating a south pole. This changeover of magnetic polarity is detected by an external magnetic induction element to operate a warning device.Type: GrantFiled: December 9, 1994Date of Patent: June 18, 1996Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Saiichiro Oshita, Hidehisa Tomizawa, Kazutoshi Fukada, Yoshihiro Yoshida