Patents by Inventor Akitoshi Kato
Akitoshi Kato 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: 8975870Abstract: A charging device supplies charge current to a battery group having plural secondary batteries connected in series to perform charging. In the charging device, a discharge route circuit for discharging charge current to be supplied to the secondary battery when the battery voltage of the secondary battery exceeds a predetermined voltage while charging is provided to every secondary battery. Also provided is a cut-off circuit for cutting off the discharge route circuit from each secondary battery after charging is completed. Discharge at a discharge route circuit is suppressed and energy efficiency is increased.Type: GrantFiled: March 31, 2009Date of Patent: March 10, 2015Assignees: Iwasaki Electric Co., Ltd., Tokyo Rectifier Co., Ltd., JPS Co., Ltd.Inventors: Tomomi Maruyama, Eiji Saiki, Akitoshi Kato, Yoshihiro Honda
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Patent number: 8810193Abstract: A charging apparatus for charging a cell group, in which a plurality of secondary cells are connected in series, by supplying a charging current Ic to the secondary cells is provided with an overcharge protection circuit including discharge route circuits 34 provided to each of the secondary cells and adapted to cause the secondary cells to discharge during charging by connecting the secondary cells to the discharge route circuits based on cell voltages Vb of the secondary cells or to stop discharging by cutting off the secondary cells from the discharge route circuits; and a charger controller for continuing charging while reducing the charging current Ic until the discharge of the secondary cell having started discharging to the discharge route circuit is stopped when the discharge of any one of the secondary cells to the discharge route circuit is started by the overcharge protection circuit.Type: GrantFiled: August 6, 2013Date of Patent: August 19, 2014Assignees: Iwasaki Electric Co., Ltd., Tokyo Rectifier Co., Ltd., JPS Co., Ltd.Inventors: Tomomi Maruyama, Eiji Saiki, Akitoshi Kato, Yoshihiro Honda
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Publication number: 20130314033Abstract: A charging apparatus for charging a cell group, in which a plurality of secondary cells are connected in series, by supplying a charging current Ic to the secondary cells is provided with an overcharge protection circuit including discharge route circuits 34 provided to each of the secondary cells and adapted to cause the secondary cells to discharge during charging by connecting the secondary cells to the discharge route circuits based on cell voltages Vb of the secondary cells or to stop discharging by cutting off the secondary cells from the discharge route circuits; and a charger controller for continuing charging while reducing the charging current Ic until the discharge of the secondary cell having started discharging to the discharge route circuit is stopped when the discharge of any one of the secondary cells to the discharge route circuit is started by the overcharge protection circuit.Type: ApplicationFiled: August 6, 2013Publication date: November 28, 2013Applicants: IWASAKI ELECTRIC CO., LTD., JPS CO., LTD., TOKYO RECTIFIER CO., LTD.Inventors: Tomomi Maruyama, Eiji Saiki, Akitoshi Kato, Yoshihiro Honda
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Patent number: 8531157Abstract: The present invention aims to suppress waste of charging power during charging and improve charging efficiency.Type: GrantFiled: February 16, 2009Date of Patent: September 10, 2013Assignees: Iwasaki Electric Co., Ltd., Tokyo Rectifier Co., Ltd., JPS Co., Ltd.Inventors: Tomomi Maruyama, Eiji Saiki, Akitoshi Kato, Yoshihiro Honda
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Patent number: 8305038Abstract: The present invention aims to reliably prevent overcharge by carrying out charging in just proportion during charging periods. A charging apparatus 1 for charging a secondary cell 22 by supplying a charging current Ic thereto is provided with a discharge amount detector 62 for detecting an amount of power discharged from the secondary cell in a non-charging state, a charge amount detector 60 for detecting an amount of power charged into the secondary cell in a charging state, and a charger controller 10 for stopping charging when the amount of charged power (charge amount Wc) becomes equal to the amount of discharged power (discharge amount Wc) during a charging period.Type: GrantFiled: February 16, 2009Date of Patent: November 6, 2012Assignees: Iwasaki Electric Co., Ltd., Tokyo Rectifier Co., Ltd., JPS Co. Ltd.Inventors: Tomomi Maruyama, Eiji Saiki, Akitoshi Kato, Yoshihiro Honda
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Publication number: 20120001595Abstract: A charging device supplies charge current to a battery group having plural secondary batteries connected in series to perform charging. In the charging device, a discharge route circuit for discharging charge current to be supplied to the secondary battery when the battery voltage of the secondary battery exceeds a predetermined voltage while charging is provided to every secondary battery. Also provided is a cut-off circuit for cutting off the discharge route circuit from each secondary battery after charging is completed. Discharge at a discharge route circuit is suppressed and energy efficiency is increased.Type: ApplicationFiled: March 31, 2009Publication date: January 5, 2012Applicants: Iwasaki Electric Co., Ltd., JPS Co., Ltd., Tokyo Rectifier Co., Ltd.Inventors: Tomomi Maruyama, Eiji Saiki, Akitoshi Kato, Yoshihiro Honda
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Publication number: 20110169454Abstract: The present invention aims to suppress waste of charging power during charging and improve charging efficiency.Type: ApplicationFiled: February 16, 2009Publication date: July 14, 2011Applicants: Iwasaki Electric Co., Ltd., Tokyo Rectifier Co., Ltd., JPS Co., Ltd.Inventors: Tomomi Maruyama, Eiji Saiki, Akitoshi Kato, Yoshihiro Honda
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Publication number: 20110169453Abstract: The present invention aims to reliably prevent overcharge by carrying out charging in just proportion during charging periods. A charging apparatus 1 for charging a secondary cell 22 by supplying a charging current Ic thereto is provided with a discharge amount detector 62 for detecting an amount of power discharged from the secondary cell in a non-charging state, a charge amount detector 60 for detecting an amount of power charged into the secondary cell in a charging state, and a charger controller 10 for stopping charging when the amount of charged power (charge amount Wc) becomes equal to the amount of discharged power (discharge amount Wc) during a charging period.Type: ApplicationFiled: February 16, 2009Publication date: July 14, 2011Applicants: Iwasaki Electric Co., Ltd., Tokyo Rectifier Co., Ltd., JPS Co., Ltd.Inventors: Tomomi Maruyama, Eiji Saiki, Akitoshi Kato, Yoshihiro Honda
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Patent number: 6679804Abstract: A multi-stage automatic transmission using a reduction planetary gear and a planetary gear set in which the respective thrust forces generated thereat are supported by a low bearing load or a low case load. The automatic transmission is provided with a reduction planetary gear, coupled to an input shaft to fix a reaction force element so as to output a reduction rotation to an output element, and a planetary gear set, that outputs a speed shift rotation upon input of the subsequent reduction rotation. During at least first gear driving, there is provided a force transmission route in which thrust forces generated at one element of the reduction planetary gear and one element of the planetary gear set, respectively, are transmitted. In that route, a torsion direction of the helical teeth of the respective elements are set such that a direction of a thrust force of the element and a direction of the thrust force of the other element are different from each other during first gear driving.Type: GrantFiled: January 30, 2002Date of Patent: January 20, 2004Assignee: Aisin AW Co., Ltd.Inventors: Hiroshi Kato, Kazumasa Tsukamoto, Masahiro Hayabuchi, Masaaki Nishida, Satoru Kasuya, Akitoshi Kato
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Patent number: 6543042Abstract: The present invention provides a layout method in design for a semiconductor integrated circuit having clock tree paths. The method comprises the steps of: extracting delay values of all of the clock tree paths; calculating an average delay value from the extracted delay values; comparing each of the delay values of the clock tree paths to the average delay value for extracting flip-flop circuits connected to the clock tree paths which have delay values smaller than the average delay value; and carrying out a batch-substituting process for batch-substituting all of the extracted flip-flop circuits by substitutional delay flip-flop circuits which have a delay compensating a difference between the average delay value and a maximum value of the delay values of all of the clock tree paths.Type: GrantFiled: January 19, 2001Date of Patent: April 1, 2003Assignee: NEC CorporationInventor: Akitoshi Kato
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Publication number: 20020065164Abstract: A multi-stage automatic transmission using a reduction planetary gear and a planetary gear set in which the respective thrust forces generated thereat are supported by a low bearing load or a low case load. The automatic transmission is provided with a reduction planetary gear, coupled to an input shaft to fix a reaction force element so as to output a reduction rotation to an output element, and a planetary gear set, that outputs a speed shift rotation upon input of the subsequent reduction rotation. During at least first gear driving, there is provided a force transmission route in which thrust forces generated at one element of the reduction planetary gear and one element of the planetary gear set, respectively, are transmitted. In that route, a torsion direction of the helical teeth of the respective elements are set such that a direction of a thrust force of the element and a direction of the thrust force of the other element are different from each other during first gear driving.Type: ApplicationFiled: January 30, 2002Publication date: May 30, 2002Applicant: AISIN AW CO., LTD.Inventors: Hiroshi Kato, Kazumasa Tsukamoto, Masahiro Hayabuchi, Masaaki Nishida, Satoru Kasuya, Akitoshi Kato
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Patent number: 6361468Abstract: A multi-stage automatic transmission using a reduction planetary gear and a planetary gear set in which the respective thrust forces generated thereat are supported by a low bearing load or a low case load. The automatic transmission is provided with a reduction planetary gear, coupled to an input shaft to fix a reaction force element so as to output a reduction rotation to an output element, and a planetary gear set, that outputs a speed shift rotation upon input of the subsequent reduction rotation. During at least first gear driving, there is provided a force transmission route in which thrust forces generated at one element of the reduction planetary gear and one element of the planetary gear set, respectively, are transmitted. In that route, a torsion direction of the spiral teeth of the respective elements are set such that a direction of a thrust force of the element and a direction of the thrust force of the other element are different from each other during first gear driving.Type: GrantFiled: December 20, 1999Date of Patent: March 26, 2002Assignee: Aisin Aw Co., Ltd.Inventors: Hiroshi Kato, Kazumasa Tsukamoto, Masahiro Hayabuchi, Masaaki Nishida, Satoru Kasuya, Akitoshi Kato
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Publication number: 20010010092Abstract: The present invention provides a layout method in design for a semiconductor integrated circuit having clock tree paths. The method comprises the steps of: extracting delay values of all of the clock tree paths; calculating an average delay value from the extracted delay values; comparing each of the delay values of the clock tree paths to the average delay value for extracting flip-flop circuits connected to the clock tree paths which have delay values smaller than the average delay value; and carrying out a batch-substituting process for batch-substituting all of the extracted flip-flop circuits by substitutional delay flip-flop circuits which have a delay compensating a difference between the average delay value and a maximum value of the delay values of all of the clock tree paths.Type: ApplicationFiled: January 19, 2001Publication date: July 26, 2001Applicant: NEC CORPORATIONInventor: Akitoshi Kato
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Patent number: 6110069Abstract: An automatic transmission includes a planetary gear set inputted a decelerated rotation and a non-decelerated rotation and outputting a plurality of shift rotations, a reduction planetary gear, an input shaft, first and third clutches which are able to engage/disengage for connecting the input shaft through the reduction planetary gear to two different decelerated rotation input elements of the planetary gear set individually, and a second clutch which is able to engage/disengage for connecting the input shaft to a non-decelerated rotation input element. The first clutch, the third clutch and the reduction planetary gear are arranged together, and the second clutch is arranged in the other side of the planetary gear set.Type: GrantFiled: June 4, 1999Date of Patent: August 29, 2000Assignee: Aisin AW Co., Ltd.Inventors: Takao Taniguchi, Kazumasa Tsukamoto, Masahiro Hayabuchi, Masaaki Nishida, Satoru Kasuya, Akitoshi Kato, Hiroshi Kato
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Patent number: 5951433Abstract: In an automatic transmission, a small-capacity second clutch that does not engage for reverse drive is mounted forward of a counter drive gear, and the other engaging elements of relatively larger capacity, that is, first and third clutches and first to third brakes, are disposed rearward of the counter drive gear, so that an axially extending space is formed between the counter drive gear and the second clutch, which space is utilized to accommodate a parking gear. Such an arrangement of engaging elements allows the counter shaft to be placed closer to the input shaft without the parking gear interfering with the second clutch, thereby enabling a more compact automatic transmission. Furthermore, since there is no need to relocate the counter drive gear rearward, the length of the counter shaft can be reduced, thereby enabling still greater compactness.Type: GrantFiled: December 1, 1997Date of Patent: September 14, 1999Assignee: Aisin AW Co., Ltd.Inventors: Kazumasa Tsukamoto, Masahiro Hayabuchi, Mitsutaka Ito, Takuya Ogino, Akitoshi Kato, Tokuyuki Takahashi, Masafumi Kinoshita
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Patent number: 5908096Abstract: A hydraulic servo unit for a vehicular power transmission system having a helical gear, including a clutch for connecting predetermined rotary elements to each other and a hydraulic servo for applying the clutch, the hydraulic servo including a cylinder, a piston fitted in the cylinder, a push member abutting against the piston through a bearing for transmitting the push force of the piston to the clutch, and a return spring for the piston, one of the rotary elements including a reaction member opposed to the push member for transmitting the push force of the piston to a case, and the cylinder is a stationary cylinder formed in the case. Further, the return spring is arranged between the push member and the reaction member and is loaded to apply a load higher than the thrust force of the helical gear, as acting upon the reaction member.Type: GrantFiled: December 20, 1996Date of Patent: June 1, 1999Assignee: Aisin AW Co., Ltd.Inventors: Kazumasa Tsukamoto, Masahiro Hayabuchi, Masaaki Nishida, Akitoshi Kato, Satoru Kasuya, Nobutada Sugiura, Tatsuya Iida
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Patent number: 5881858Abstract: A hydraulic servo-mechanism for an automatic transmission, including a hydraulic servo for applying a band brake to engage a band to a drum. The hydraulic servo includes a rod which is selectively positionable to an apply position for applying the band brake, a standby position in which the rod is retracted by a predetermined extent in a release direction from the apply position, and a retracted position in which the rod is further retracted in the release direction from the standby position to release the band brake.Type: GrantFiled: December 27, 1996Date of Patent: March 16, 1999Assignee: Aisin AW Co., Ltd.Inventors: Kazumasa Tsukamoto, Masahiro Hayabuchi, Masaaki Nishida, Akitoshi Kato, Katsuyuki Tanahashi
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Patent number: 5735369Abstract: A band brake drum supporting device for an automatic transmission having a band drum to be retained in a case by fastening a band brake which is joined to a rotary element of the automatic transmission and arranged in the case. The drum includes a band engaging portion and a cylindrical drum supporting portion extending radially inward from the band engaging portion while being offset axially with respect to the band engaging portion. The outer circumference of the drum supporting portion is supported through two axially juxtaposed bearings on a stationary support portion which extends radially outward of the drum supporting portion from the case. The stationary support portion includes a cylindrical boss portion disposed coaxially with the drum supporting portion and engaging at its inner circumference with the two bearings and a planar flange portion extending radially outward from the end portion of the boss portion which is located closer to the band brake.Type: GrantFiled: December 20, 1996Date of Patent: April 7, 1998Assignee: Aisin Aw Co., Ltd.Inventors: Kazumasa Tsukamoto, Masahiro Hayabuchi, Masaaki Nishida, Akitoshi Kato, Satoru Kasuya, Nobutada Sugiura, Tatsuya Iida
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Patent number: 5683325Abstract: A 5-speed automatic transmission for a vehicle having a highly efficient top gear, a compact construction and a wide overall range of gear ratios. The automatic transmission has a speed changer which provides five gear stages, namely two speeds on the speed decreasing side and two speeds on the speed increasing side with a direct-coupled gear therebetween. The speed changer includes a ring gear connected to an output shaft, a first carrier, a first sun gear, a second carrier connected to the first carrier, a stepped pinion gear supported by these two carriers, and a sun gear meshing with the pinion gear. The first carrier is connected to an input shaft by a clutch and the first sun gear is connected to the input shaft by a clutch. The first sun gear may be stopped by a first brake, a second brake stops the second sun gear and a third brake is provided to stop a third sun gear. Top gear is achieved by meshing of the pinion gear with the second sun gear and the ring gear.Type: GrantFiled: March 22, 1996Date of Patent: November 4, 1997Assignee: Aisin AW Co., Ltd.Inventors: Shuzo Moroto, Takao Taniguchi, Shoichi Miyagawa, Kazumasa Tsukamoto, Masahiro Hayabuchi, Masaaki Nishida, Satoru Kasuya, Akitoshi Kato, Nobutada Sugiura