Patents by Inventor Takahiro Sakai

Takahiro Sakai 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: 20050227065
    Abstract: A thermo-reactive flame-retardant adhesive tape having high flame-retardancy and a method for producing the same are disclosed. The adhesive tape comprises a substrate and a solvent-less type photo-curing pressure-sensitive adhesive applied onto the substrate, the solvent-less type photo-curing pressure-sensitive adhesive comprising a photo-curing pressure-sensitive adhesive, as well as a dripping inhibitor and a flame retardant both added into the photo-curing pressure-sensitive adhesive, the photo-curing pressure-sensitive adhesive containing as main components at least a (metha)acrylic acid alkyl ester monomer, a polar group-containing monomer, and a photo-polymerization initiator.
    Type: Application
    Filed: August 19, 2002
    Publication date: October 13, 2005
    Inventors: Hiroaki Nishimura, Takahiro Sakai, Kazuo Nate
  • Publication number: 20040242360
    Abstract: A control apparatus for a vehicular automatic transmission includes a control portion that executes a neutral control in which the control portion places the automatic transmission in a neutral state by reducing an application load on a frictional apply device inside the automatic transmission when the vehicle is stopped. The control portion ends the neutral control when a torque transmitted to the frictional apply device has been continually equal to, or greater than, a predetermined value for a consecutive predetermined of time. As a result, by considering the torque transmitted to the frictional apply device in addition to the continuation time of the neutral control, it is possible to more precisely grasp the state of the frictional apply device. In other words, it is possible to execute, as quickly as possible, neutral control for an extended period of time while ensuring durability of the frictional apply device.
    Type: Application
    Filed: May 20, 2004
    Publication date: December 2, 2004
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Makoto Nakayashiki, Tooru Matsubara, Takahiro Sakai, Yoshio Hasegawa, Yoshikazu Tanaka
  • Publication number: 20030020030
    Abstract: A concentration measurer for measuring the concentration of turbidities in object liquid by detecting the diffuse reflection light of a laser beam emitted to the object liquid, comprising a concentration detecting part formed by bundling a plurality of optical fibers for laser beam emission and a plurality of optical fibers for laser beam receiving. In this measurer, a body part having an emitter and a receiver for the laser beam and the concentration detecting part can be formed separately from each other, and the body part and the concentration detecting part can be connected by flexible optical fibers. By this measurer, a concentration up to a high turbidity concentration can be measured with high sensitivity and, when the concentration detecting part is formed separately from the body part, the concentration detecting part can be easily installed even in a restricted area and an adverse environment.
    Type: Application
    Filed: July 8, 2002
    Publication date: January 30, 2003
    Inventors: Toshio Harada, Tomoyuki Hayashi, Saihei Yano, Shigeo Sato, Tsuneo Imazu, Takahiro Sakai, Yuzo Miyazawa, Kinichiro Kono
  • Patent number: 6358606
    Abstract: The present invention relates to an acrylic pressure-sensitive adhesive double coated tape or sheet, an acrylic non-substrate pressure-sensitive adhesive transfer tape or sheet, and a method for manufacturing the same. The acrylic pressure-sensitive adhesive double coated tape or sheet and the acrylic non-substrate pressure-sensitive adhesive transfer tape or sheet are manufactured by the use of a light-cured adhesive whose main components are a (metha)alkyl ester acrylate monomer, a polar functional group containing monomer, an acrylic polymer having a photo-active functional group, and photopolymerization initiating agent, wherein the acrylic polymer having a photo-active functional group has a weight average molecular weight of 200,000 to 3,000,000 and the content of the photo-active functional group of 0.001 milli-equivalent/g to 0.5 milli-equivalent/g.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: March 19, 2002
    Assignee: Sliontec Corporation
    Inventors: Takahiro Sakai, Akiyoshi Masuda, Kazuo Nate
  • Patent number: 6074325
    Abstract: A shift control unit which improves the shift feeling of an automatic transmission includes an operation control device for placing a frictional engaging element in a slow drain state during a timing time decided by a timing time deciding device and in a quick drain state when the timing time has elapsed.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: June 13, 2000
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Yoshiyuki Onimaru, Masato Shimei, Takanao Suzuki, Yasuo Shirai, Atuo Okumura, Takahiro Sakai
  • Patent number: 5515272
    Abstract: A diagnosing apparatus for diagnosing a vehicle automatic transmission system including an automatic transmission having frictional coupling devices, and solenoid-operated valves for controlling the frictional coupling devices to shift the automatic transmission according to shift commands generated by a control device, the apparatus including a speed detector for detecting an engine speed of the vehicle, a device for determining a reference range of the engine speed within which the engine speed is expected to fall when the transmission is placed in a position selected by a shift command, a device for determining whether a predetermined running condition of the vehicle is satisfied, and a defect detector for determining whether there exists a defect associated with the automatic transmission system, depending upon whether the detected engine speed is held within or outside the determined reference range when the predetermined vehicle running condition is satisfied.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: May 7, 1996
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahiro Sakai, Atsuo Okumura, Koichi Miyamoto
  • Patent number: 5443595
    Abstract: A control apparatus for an automatic transmission having a set of frictional engagement elements arranged to be selectively engaged or disengaged in shift-up operation of the transmission, and a shift timing valve arranged to be switched over by hydraulic pilot pressure applied there-to under control of a solenoid valve for switching over discharge of fluid under pressure from one of the frictional engagement elements to be disengaged in the shift-up operation from a slow-drain condition to a quick-drain condition. The control apparatus is designed to detect a drive torque of a vehicle engine, to determine a timing period for energization of the solenoid valve in the shift-up operation in accordance with the drive torque of the vehicle engine, to maintain the solenoid valve in its deenergized condition during the timing period, and to energize the solenoid valve upon lapse of the timing period.
    Type: Grant
    Filed: July 23, 1993
    Date of Patent: August 22, 1995
    Assignee: Aisin Seiki Kabishuki Kaisha
    Inventors: Masato Shimei, Shigeki Goto, Takahiro Sakai, Masahiko Nakagawa
  • Patent number: 4827807
    Abstract: A hydraulic control system for a four-wheel drive torque transfer mechanism for a vehicle, including an automatic transmission, a transfer mechanism having gear positions of a two-wheel drive direct-coupling mode H.sub.2, a four-wheel drive direct-coupling mode H.sub.4 and a reduced-speed four-wheel drive mode L.sub.4, and a hydraulic control circuit for controlling the transmission and the transfer mechanism. The transfer mechanism includes a reduction gear mechanism, a first output shaft, a second output shaft rotationally connectible to the first output shaft through a link mechanism, a four-wheel drive clutch for releasably coupling the first and second output shafts, a direct-coupling clutch for releasably coupling an input shaft of the reduction gear mechanism with the first output shaft, and a reduction brake for setting the reducing gear mechanism in a gear train of the reduced-speed mode.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: May 9, 1989
    Assignee: Aisin Warner Kabushiki Kaisha
    Inventors: Yoichi Hayakawa, Yasunobu Ito, Takahiro Sakai
  • Patent number: 4688451
    Abstract: In an upshift timing system which provides a drain passage at higher flow resistance for a first friction engaging device to be disengaged when a hydraulic fluid pressure of a second friction engaging device to be engaged supplied as an actuating pressure to a control port of an upshift timing control valve is less than a certain value and at lower flow resistance when the actuating pressure is greater than the certain value, the control port is supplied with the actuating pressure directly from a pressure chamber of the second friction engaging device via a passage which is separate from a passage which supplies actuating pressure from a pressure source to the pressure chamber of the second friction engaging device.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: August 25, 1987
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahiro Sakai, Isamu Minemoto
  • Patent number: 4616532
    Abstract: An automatic transmission has first and second pressure actuated friction engaging devices to provide a lower speed stage when the first friction engaging device is engaged and the second friction engaging device is disengaged, or vice versa; a speed shift valve which changes over supplying and exhausting hydraulic fluid pressure to and from the first and second friction engaging devices; a downshift timing system which provides lower flow resistance at lower road speed and higher flow resistance at higher road speed in a passage for supplying hydraulic fluid pressure to the first friction engaging device; an upshift timing system which provides higher flow resistance to a passage for exhausting hydraulic fluid pressure from the first friction engaging device before the hydraulic fluid pressure in the second friction engaging device increases to a predetermined value and lower flow resistance to the same drain passage when the hydraulic fluid pressure in the second friction engaging device has increased to th
    Type: Grant
    Filed: January 26, 1984
    Date of Patent: October 14, 1986
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahiro Sakai, Isamu Minemoto
  • Patent number: 4606242
    Abstract: A parking device for an automatic transmission system in automotive vehicles includes a parking gear connected to the engine output shaft, a pawl having one end pivotally mounted to the transmission housing and the other end pivotable towards and away from the parking gear, and a parking cam operatively associated with the pawl and movable axially of the gear for bringing the pawl into and out of engagement with the parking gear. A cam guide and a reaction supporting bracket are retained by a plurality of bolts and by at least one boss having a flat surface and affixed to the transmission housing so as to be situated on the side of the pawl opposite the parking cam.
    Type: Grant
    Filed: July 10, 1985
    Date of Patent: August 19, 1986
    Assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiromi Hasegawa, Yoshinobu Iwase, Yutaka Taga, Isamu Minemoto, Takahiro Sakai
  • Patent number: 4347763
    Abstract: A one-way brake having end bearings the support wall of each of which is protruded at the inner race side portion thereof in the outward direction with respect to a space between inner and outer races from that surface of the support wall which is contacted by a support means connected to the outer race, to thereby increase the area of that portion of the inner race which is in sliding contact with an inner rib of the support wall. Accordingly, the wear resistance and stiffness of the end bearings can be increased without increasing an attaching space.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: September 7, 1982
    Assignee: Aisin Warner K.K.
    Inventors: Shiro Sakakibara, Kazumasa Tsukamoto, Takahiro Sakai, Yukio Terakura
  • Patent number: 4176009
    Abstract: A method of measuring collagenase activity using as substrates peptide derivatives having the structure A-Pro-B-Gly-C-Ala-Gly-E wherein A is a hydrophobic neutral or acidic chromophore, B is an amino acid residue, C is Ile or Leu, E is Gln-D-Arg-OH or D-Arg-OH and all the amino acid residues except for Gly are L-configuration unless otherwise stated.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: November 27, 1979
    Assignee: Ajinomoto Co., Inc.
    Inventors: Shumpei Sakakibara, Yutaka Nagai, Kenji Fujiwara, Takahiro Sakai
  • Patent number: 4139015
    Abstract: A hydraulic pressure control device for use, for example, in an automatic transmission, in which a line pressure to be supplied from a hydraulic pressure source to a hydraulic pressure servo-device is controlled in three stages by means of a main spool which is displaced in a bleed-off valve of the line pressure by a subsidiary spool under a varying hydraulic control pressure. The subsidiary spool has at least one land forming a piston slidingly fitted in a movable sleeve having a closed end, the movable sleeve also forming a piston by being in turn slidingly fitted for limited movement in a stationary sleeve having a closed end. A first space between the outer wall of the closed end of the movable sleeve and the inner wall of the closed end of the stationary sleeve, and a second space within the piston chamber of the movable sleeve have ports for the introduction of hydraulic control pressure.
    Type: Grant
    Filed: July 27, 1976
    Date of Patent: February 13, 1979
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventor: Takahiro Sakai
  • Patent number: 4138394
    Abstract: Peptide derivatives are obtained by eliminating the masking groups from masked peptide derivatives in which the guanidino group of an arginine residue and the carboxyl group of the arginine residue are masked. The guanidino group can be masked, for example, with a tosyl, nitro or benzyloxycarbonyl group, and the carboxyl group can be masked by converting it to an ester group, for example, a benzyl or t-butyl ester group. The masking groups can be eliminated using hydrogen fluoride, for example.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: February 6, 1979
    Assignee: Ajinomoto Co., Inc.
    Inventors: Shumpei Sakakibara, Yutaka Nagai, Kenji Fujiwara, Takahiro Sakai
  • Patent number: D325912
    Type: Grant
    Filed: December 11, 1990
    Date of Patent: May 5, 1992
    Assignee: NEC Corporation
    Inventors: Takahiro Sakai, Toshiaki Mizushima
  • Patent number: D374675
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: October 15, 1996
    Assignee: NEC Corporation
    Inventors: Takahiro Sakai, Zin Sakai