Patents by Inventor Shigeo Tsuzuki

Shigeo Tsuzuki 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).

  • Publication number: 20190353844
    Abstract: An optical module which is connectable to an optical fiber array and which can be packaged in a high density. Two 30 mm square package modules are mounted on a board, and optical waveguides in a 20 mm square Si photonic lightwave circuit mounted on the package module are connected to an optical fiber array fixed to an optical fiber block (15×10 mm). Moreover, output end surfaces of the optical waveguides in the Si photonic lightwave circuit are perpendicular to a mount surface of the package module. In the embodiment, the optical waveguides in the Si photonic lightwave circuit are tilted at an appropriate angle, for example, 20 degrees with respect to a direction perpendicular to a right end surface. Moreover, the optical fiber block fixes optical fibers with the optical fibers tilted at 20 degrees with respect to a direction perpendicular to an end surface connected to the Si photonic lightwave circuit.
    Type: Application
    Filed: May 12, 2017
    Publication date: November 21, 2019
    Inventors: Tomohiro Nakanishi, Teruaki Sato, Motohaya Ishii, Satoru Konno, Yuichi Suzuki, Shigeo Nagashima, Shinji Mino, Shuichiro Asakawa, Hiroshi Fukuda, Shin Kamei, Shunichi Soma, Ken Tsuzuki, Mitsuo Usui, Takashi Saida
  • Patent number: 8091873
    Abstract: A coned disc spring is arranged between a second component and a third component provided inside a tubular first component and movable in an axial direction. The coned disc spring comprises a body having a circular dish shape, teeth closely fitting into spline grooves formed on an inner peripheral surface of the first component and projecting to a radial outer side on an outer periphery of the body, and a stress relaxation portion formed by notching a base of the tooth in an approximately circular arc shape in a direction at least one of a circumferential direction and a radial direction of the body.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: January 10, 2012
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Aw Co., Ltd., NHK Spring Co., Ltd.
    Inventors: Yukitoshi Ogawa, Takayuki Ishikawa, Akihiko Kita, Shigeo Tsuzuki, Hiroyuki Nozaki, Hironobu Imaizumi
  • Patent number: 8016718
    Abstract: A vehicle drive unit is provided which includes a hydraulic circuit capable of efficiently supplying a hydraulic pressure from an accumulator to a hydraulic servo while minimizing the capacity of the accumulator. In a hydraulic circuit included in a continuously variable transmission, an accumulator is connected through an electromagnetic switch valve to an oil passage connecting a clutch pressure control valve and a manual valve, a one-way valve for allowing oil to flow only in the direction from the clutch pressure control valve toward the accumulator and the forward clutch is provided in the oil passage. The electromagnetic switch valve switches an oil passage to a communicating state when the oil pump is driven and switches the oil passage to a shut-off state when the oil pump is stopped.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: September 13, 2011
    Assignee: Aisin AW Co., Ltd.
    Inventors: Atsuya Ohshima, Shigeo Tsuzuki, Mitsugi Yamashita, Haruki Shirasaka
  • Publication number: 20090143193
    Abstract: A vehicle drive unit is provided which includes a hydraulic circuit capable of efficiently supplying a hydraulic pressure from an accumulator to a hydraulic servo while minimizing the capacity of the accumulator. In a hydraulic circuit included in a continuously variable transmission, an accumulator is connected through an electromagnetic switch valve to an oil passage connecting a clutch pressure control valve and a manual valve, a one-way valve for allowing oil to flow only in the direction from the clutch pressure control valve toward the accumulator and the forward clutch is provided in the oil passage. The electromagnetic switch valve switches an oil passage to a communicating state when the oil pump is driven and switches the oil passage to a shut-off state when the oil pump is stopped.
    Type: Application
    Filed: November 18, 2008
    Publication date: June 4, 2009
    Applicant: AISIN AW CO., LTD.
    Inventors: Atsuya Ohshima, Shigeo Tsuzuki, Mitsugi Yamashita, Haruki Shirasaka
  • Patent number: 7438168
    Abstract: A cushion plate is provided, for example, between a piston of a hydraulic servo and an adjacent friction plate in a frictional engagement element of an automatic transmission. The cushion plate is deflected by a pressing force of the piston to absorb an engagement shock. The cushion plate includes a main body portion formed into a belleville-spring shape, and a plurality of pawls that extend from the outer periphery of the main body for spline engagement with a member that is splined to, for example, the friction plate. A side wall of each pawl is formed with a curved recess extending circumferentially of the cushion plate and located adjacent the juncture (base) of the pawl at the outer periphery of the main body.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: October 21, 2008
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha, NHK Spring Co., Ltd.
    Inventors: Akihiko Kita, Shigeo Tsuzuki, Hiroyuki Nozaki, Yukitoshi Ogawa, Takayuki Ishikawa, Hironobu Imaizumi
  • Publication number: 20080116029
    Abstract: A cushion plate is provided, for example, between a piston of a hydraulic servo and an adjacent friction plate in a frictional engagement element of an automatic transmission. The cushion plate is deflected by a pressing force of the piston to absorb an engagement shock. The cushion plate includes a main body portion formed into a belleville-spring shape, and a plurality of pawls that extend from the outer periphery of the main body for spline engagement with a member that is splined to, for example, the friction plate. A side wall of each pawl is formed with a curved recess extending circumferentially of the cushion plate and located adjacent the juncture (base) of the pawl at the outer periphery of the main body.
    Type: Application
    Filed: January 15, 2008
    Publication date: May 22, 2008
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, NHK SPRING CO., LTD.
    Inventors: Akihiko Kita, Shigeo Tsuzuki, Hiroyuki Nozaki, Yukitoshi Ogawa, Takayuki Ishikawa
  • Publication number: 20050263367
    Abstract: A cushion plate is provided, for example, between a piston of a hydraulic servo and an adjacent friction plate in a frictional engagement element of an automatic transmission. The cushion plate is deflected by a pressing force of the piston to absorb an engagement shock. The cushion plate includes a main body portion formed into a belleville-spring shape, and a plurality of pawls that extend from the outer periphery of the main body for spline engagement with a member that is splined to, for example, the friction plate. A side wall of each pawl is formed with a curved recess extending circumferentially of the cushion plate and located adjacent the juncture (base) of the pawl at the outer periphery of the main body.
    Type: Application
    Filed: May 25, 2005
    Publication date: December 1, 2005
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiko Kita, Shigeo Tsuzuki, Hiroyuki Nozaki, Yukitoshi Ogawa, Takayuki Ishikawa
  • Patent number: 6935450
    Abstract: A motor/generator is arranged radially outward of a middle portion of a front cover of a torque converter so that at least a part of the motor/generator axially overlaps the torque converter, with a predetermined gap (C) between the front cover and the rotor of the motor/generator. The rotor of the motor/generator is supported by either the torque converter or an engine crankshaft or by any two of the torque converter, a motor housing and the crankshaft. The rotor is not affected by the torque converter and the efficiency of the motor is not reduced.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: August 30, 2005
    Assignee: Aisin Aw Co., Ltd.
    Inventors: Shigeo Tsuzuki, Takeshi Inuzuka, Satoru Wakuta, Takahiro Kido, Takao Taniguchi, Kazumasa Tsukamoto, Kenji Omote
  • Patent number: 6877390
    Abstract: A vehicle range changeover mechanism is driven in response to operation of a shift lever. The range changeover mechanism has an output sector gear that is unrotatably connected to a range control shaft, and a position detecting sensor, a portion of which that is interlocked with and connected to the range control shaft. Looseness between the output sector gear and the position detecting sensor portion is eliminated by provision of a leaf or spring plate, thereby assuring rotation of the position detecting sensor portion corresponding one to one with the rotational motion of the range control shaft.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: April 12, 2005
    Assignee: Aisin AW Co., Ltd.
    Inventors: Shigeo Tsuzuki, Jiro Maeda, Naoki Ohkoshi
  • Patent number: 6866611
    Abstract: A judging section judges whether or not ranges detected, respectively, by a first range detection section consisting of a first detection section and a position detecting sensor, and a second range detection section consisting of a second detection section; a C1 detecting sensor and a B1 detecting sensor are in mutual agreement, and when the detected ranges are not in mutual agreement, a failure judging section judges a failure of the first range detection section.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: March 15, 2005
    Assignee: Aisin AW Co., Ltd.
    Inventors: Shigeo Tsuzuki, Jiro Maeda, Naoki Ohkoshi
  • Patent number: 6777837
    Abstract: A hybrid-vehicle drive unit supports a motor-generator with high precision, improving the efficiency of the motor-generator, and reducing the size of the motor-generator, independent of any influence of centering precision of the crank shaft and of deformation of the torque converter. According to the invention, a motor housing is disposed between a converter housing and an internal combustion engine, and a bearing is fitted to a lateral wall provided in a front portion of the motor housing. Rotor supporting members are independently supported by the bearing. Eccentric rotation of the crank shaft resulting from explosive vibrations of the engine is counteracted by two flex plates. Owing to a predetermined clearance, one of the rotor supporting members as a separate component is free from the influence of deformation of the torque converter.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: August 17, 2004
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Shigeo Tsuzuki, Kenji Omote, Masahiro Hasebe, Satoru Wakuta, Keiichi Shinohara, Atsushi Tabata, Yutaka Taga, Seiji Nakamura, Masaya Amano
  • Publication number: 20040053743
    Abstract: A judging section judges whether or not ranges detected, respectively, by a first range detection section consisting of a first detection section and a position detecting sensor, and a second range detection section consisting of a second detection section; a C1 detecting sensor and a B1 detecting sensor are in mutual agreement, and when the detected ranges are not in mutual agreement, a failure judging section judges a failure of the first range detection section.
    Type: Application
    Filed: June 26, 2003
    Publication date: March 18, 2004
    Inventors: Shigeo Tsuzuki, Jiro Maeda, Naoki Ohkoshi
  • Publication number: 20040018907
    Abstract: A vehicle range changeover mechanism is driven in response to operation of a shift lever. The range changeover mechanism has an output sector gear that is unrotatably connected to a range control shaft, and a position detecting sensor, a portion of which that is interlocked with and connected to the range control shaft. Looseness between the output sector gear and the position detecting sensor portion is eliminated by provision of a leaf or spring plate, thereby assuring rotation of the position detecting sensor portion corresponding one to one with the rotational motion of the range control shaft.
    Type: Application
    Filed: February 25, 2003
    Publication date: January 29, 2004
    Inventors: Shigeo Tsuzuki, Jiro Maeda, Naoki Ohkoshi
  • Patent number: 6662904
    Abstract: A lubricating apparatus, for a friction engagement element that engages a rotatable member with a case includes a hub connected to the rotatable member, friction members disposed between the hub and the case, a hydraulic servo for engaging the friction members, and an oil passage for supplying lubricant from the case to the friction members. A discharge opening of the oil passage is formed at a position which is radially inward of the friction members and which is axially to a side of the friction members. The discharge opening is directed toward the friction members. A weir member for restricting escape of lubricant in the axial direction through a gap between the hub and the friction members is provided at the other axial side of the friction members. Therefore, the axial escape of lubricant exiting the friction members can be prevented by a non-contact leakage restriction that does not cause drag resistance.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: December 16, 2003
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji Omote, Takeshi Inuzuka, Shigeo Tsuzuki, Mitsuhiro Umeyama, Hisanori Nomoto, Yuji Iwase
  • Patent number: 6634982
    Abstract: An automatic transmission control apparatus includes a continuously variable transmission (CVT) which, in turn, includes a primary pulley, a secondary pulley, a belt stretched between the primary pulley and the secondary pulley. The control apparatus further includes a pinching pressure generator for generating a pinching pressure on the belt, a travel environment all detector for detecting the travel environment of a vehicle, a torque variation estimator for estimating the transmission torque variation during travel, and a pinching pressure changer for changing the pinching pressure based on the estimation. The pinching pressure is prevented from constantly increasing because the transmission torque variation during travel is estimated, and the pinching pressure for the belt is changed based on the estimation. Accordingly, the torque transmission efficiency can be increased, and the fuel efficiency can thus be improved.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: October 21, 2003
    Assignee: Aisin AW Co., Ltd.
    Inventors: Nobuaki Miki, Shigeo Tsuzuki, Hiroshi Ishigaki, Seiji Sakakibara, Masashi Hattori, Kazuo Takemoto, Masao Kawai, Toshihiro Shiimado
  • Patent number: 6499371
    Abstract: A range switching apparatus is provided with a pair of discs defining, an engagement groove therebetween, a pin, and an arm portion which are used for switching to a desired drive range; a motor for driving the discs, the engagement groove, the pin, and the arm portion used for switching the drive range; a speed reducing gear mechanism for reducing a drive force of the motor and transmitting the drive force to the discs, the engagement groove, the pin, and the arm portion, used for switching the drive range; and an electromagnetic clutch for engaging and disengaging a power transmission state between the motor and the speed reducing gear mechanism. An adsorbed disc of the electromagnetic clutch is connected to a power input shaft of the speed reducing gear mechanism.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: December 31, 2002
    Assignee: Aisin Aw Co., Ltd.
    Inventors: Shigeo Tsuzuki, Kazuo Takemoto, Naoki Ohkoshi, Yoshitaka Murase, Hirotoshi Eishima, Jiro Maeda
  • Patent number: 6478101
    Abstract: To reduce the axial dimension and size of a drive train for a hybrid vehicle, a rotor is supported within a recess formed in the end face of the a crankshaft and is further supported by the front cover of the torque converter. As a result, compared with drive trains which have a fixed member extending from the motor housing to support the rotor, the axial dimension and size of the drive train are reduced.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: November 12, 2002
    Assignee: Aisin Aw Co., Ltd.
    Inventors: Takao Taniguchi, Kazumasa Tsukamoto, Satoru Wakuta, Shigeo Tsuzuki, Takeshi Inuzuka, Kenji Omote
  • Publication number: 20020165064
    Abstract: It is an object of the present invention to provide an automatic transmission control apparatus in which the durability of a continuously variable transmission (10) can be improved and the torque transmission efficiency can be increased, an automatic transmission control method and a recording medium with its program recorded. The invention comprises a primary pulley (126), a secondary pulley (131), a belt (132) stretched between the primary pulley (126) and the secondary pulley (131), pinching pressure generation means for generating a pinching pressure for the belt (132), travel environment detection means (91) for detecting the travel environment of a vehicle, torque variation estimation processing means (92) for estimating the transmission torque variation during travel, and pinching pressure change processing means (93) for changing the pinching pressure based on the estimated results.
    Type: Application
    Filed: November 5, 2001
    Publication date: November 7, 2002
    Inventors: Nobuaki Miki, Shigeo Tsuzuki, Hiroshi Ishigaki, Seiji Sakakibara, Masashi Hattori, Kazuo Takemoto, Masao Kawai, Toshihiro Shiimado
  • Publication number: 20020134185
    Abstract: A range switching apparatus (1) is provided with a disc (2b), an engagement groove (2c), a pin (5a), and an arm portion (5b), which are used for switching a range, a motor (12) for driving the disc (2b), the engagement groove (2c), the pin (5a), and the arm portion (5b), which are used for switching a range, a speed reducing gear mechanism (46) for reducing a drive force of the motor (12) and transmitting the drive force to the disc (2b), the engagement groove (2c), the pin (5a), and the arm portion (5b), which are used for switching a range, and an electromagnetic clutch (30) for engaging and disengaging a power transmission state between the motor (12) and the speed reducing gear mechanism (46). An adsorbed disc (31) of the electromagnetic clutch (30) is connected to a power input shaft (38) of the speed reducing gear mechanism (46).
    Type: Application
    Filed: August 10, 2001
    Publication date: September 26, 2002
    Inventors: Shigeo Tsuzuki, Kazuo Takemoto, Naoki Ohkoshi, Yoshitaka Murase, Hirotoshi Eishima, Jiro Maeda
  • Publication number: 20020036120
    Abstract: A lubricating apparatus, for a friction engagement element that engages a rotatable member with a case includes a hub connected to the rotatable member, friction members disposed between the hub and the case, a hydraulic servo for engaging the friction members, and an oil passage for supplying lubricant from the case to the friction members. A discharge opening of the oil passage is formed at a position which is radially inward of the friction members and which is axially to a side of the friction members. The discharge opening is directed toward the friction members. A weir member for restricting escape of lubricant in the axial direction through a gap between the hub and the friction members is provided at the other axial side of the friction members. Therefore, the axial escape of lubricant exiting the friction members can be prevented by a non-contact leakage restriction that does not cause drag resistance.
    Type: Application
    Filed: September 20, 2001
    Publication date: March 28, 2002
    Inventors: Kenji Omote, Takeshi Inuzuka, Shigeo Tsuzuki, Mitsuhiro Umeyama, Hisanori Nomoto, Yuji Iwase