Patents by Inventor Yoshifumi Yamada

Yoshifumi Yamada 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).

  • Patent number: 9385378
    Abstract: Provided herein is a lead-acid battery for which the risk of breakage of a current collecting lug part of a plate while in use is eliminated by simple means. At least a positive plate group of the lead-acid battery includes: one or more plates each including a current collector having a current collecting portion formed by expanding or punching a lead alloy sheet manufactured by cold rolling, and one or more current collecting lug parts unitarily formed with the current collecting portion; and a strap formed by a cast-on strap casting method and coupled to the one or more current collecting lug parts. The current collecting lug part is formed with an elongated protrusion extending in a direction away from the current collecting portion. The elongated protrusion continuously extends in a direction toward the current collecting portion of the plate from inside the strap.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: July 5, 2016
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Hiroki Tsuji, Masatoshi Miyatsuka, Kazuya Sasaki, Naoki Tsuji, Kenichi Maeda, Yoshifumi Yamada
  • Publication number: 20150180048
    Abstract: Provided herein is a lead-acid battery for which the risk of breakage of a current collecting lug part of a plate while in use is eliminated by simple means. At least a positive plate group of the lead-acid battery includes: one or more plates each including a current collector having a current collecting portion formed by expanding or punching a lead alloy sheet manufactured by cold rolling, and one or more current collecting lug parts unitarily formed with the current collecting portion; and a strap formed by a cast-on strap casting method and coupled to the one or more current collecting lug parts. The current collecting lug part is formed with an elongated protrusion extending in a direction away from the current collecting portion. The elongated protrusion continuously extends in a direction toward the current collecting portion of the plate from inside the strap.
    Type: Application
    Filed: March 6, 2015
    Publication date: June 25, 2015
    Inventors: Hiroki TSUJI, Masatoshi MIYATSUKA, Kazuya SASAKI, Naoki TSUJI, Kenichi MAEDA, Yoshifumi YAMADA
  • Patent number: 8999572
    Abstract: Provided herein is a lead-acid battery for which the risk of breakage of a current collecting lug part of a plate while in use is eliminated by simple means. At least a positive plate group of the lead-acid battery includes: one or more plates each including a current collector having a current collecting portion formed by expanding or punching a lead alloy sheet manufactured by cold rolling, and one or more current collecting lug parts unitarily formed with the current collecting portion; and a strap formed by a cast-on strap casting method and coupled to the one or more current collecting lug parts. The current collecting lug part is formed with an elongated protrusion extending in a direction away from the current collecting portion. The elongated protrusion continuously extends in a direction toward the current collecting portion of the plate from inside the strap.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: April 7, 2015
    Assignee: Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Hiroki Tsuji, Masatoshi Miyatsuka, Kazuya Sasaki, Naoki Tsuji, Kenichi Maeda, Yoshifumi Yamada
  • Publication number: 20120091665
    Abstract: A seal structure for sealing a penetrated portion through which a rotary shaft passes between a cover member and the rotary shaft. A seal member is fitted onto the rotary shaft in a manner that the rotary shaft can rotate relative to the seal member, and the elastic buffer member is provided for connection between the seal member and the cover member at the penetrated portion. The seal structure can keep sealing performance by reducing the influence of movements such as vibration and thermal expansion of the cover member and the influence of process tolerance of the cover member on the sealing performance of the seal member attached to the penetrated portion between the cover member and the rotary shaft penetrating the cover member.
    Type: Application
    Filed: March 18, 2010
    Publication date: April 19, 2012
    Applicants: Uchiyama Manufacturing Corp., Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha
    Inventors: Matsuhiro Okuda, Tomokazu Sumida, Kazuya Yoshijima, Takahiro Yamazaki, Yoshifumi Yamada, Hiroyuki Matsuoka, Hirotaka Kurita, Susumu Fujita, Yasuhiko Ohashi
  • Publication number: 20120064402
    Abstract: Provided herein is a lead-acid battery for which the risk of breakage of a current collecting lug part of a plate while in use is eliminated by simple means. At least a positive plate group of the lead-acid battery includes: one or more plates each including a current collector having a current collecting portion formed by expanding or punching a lead alloy sheet manufactured by cold rolling, and one or more current collecting lug parts unitarily formed with the current collecting portion; and a strap formed by a cast-on strap casting method and coupled to the one or more current collecting lug parts. The current collecting lug part is formed with an elongated protrusion extending in a direction away from the current collecting portion. The elongated protrusion continuously extends in a direction toward the current collecting portion of the plate from inside the strap.
    Type: Application
    Filed: March 14, 2011
    Publication date: March 15, 2012
    Inventors: Hiroki TSUJI, Masatoshi Miyatsuka, Kazuya Sasaki, Naoki Tsuji, Kenichi Maeda, Yoshifumi Yamada
  • Patent number: 8036839
    Abstract: A battery state determining apparatus is provided which can accurately determine a state of a lead battery in an automotive vehicle. The apparatus calculates a corrected engine starting voltage Vst1 from an open-circuit voltage (OCV) measuring section that measures the open circuit voltage Vst of the lead battery at an engine starting time in accordance with a temperature of the vehicle. The apparatus further calculates a battery determination voltage Vst_th representing a voltage of the lead battery at an engine starting time when a growth rate of internal resistance of the lead battery reaches a predetermined value from the open-circuit voltage OCV. The apparatus then determines the battery state of the lead battery by determining whether the corrected engine starting voltage Vst1 is larger than the battery determination voltage Vst_th and whether the corrected engine starting voltage Vst1 belongs to a predetermined region on a characteristic map.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: October 11, 2011
    Assignee: Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Yoshiaki Machiyama, Keizo Yamada, Yoshifumi Yamada, Takashi Hara
  • Publication number: 20090088994
    Abstract: The present invention provides a battery state determining apparatus which can determine a battery state of a lead battery from an engine starting voltage accurately considering influence of a temperature of a vehicle. An engine starting voltage Vst1 obtained by correcting an engine starting voltage Vst of a lead battery at an engine starting time is calculated based upon an open-circuit voltage OCV and a temperature of a vehicle (S112), a battery determination voltage Vst_th representing a voltage of the lead battery at an engine starting time when a growth rate of internal resistance of the lead battery reaches a predetermined value from the open-circuit voltage OCV is calculated (S126), and a battery state of the lead battery is determined by determining whether an engine starting voltage Vst1 belongs to a predetermined region on a characteristic map (S132).
    Type: Application
    Filed: March 8, 2007
    Publication date: April 2, 2009
    Applicant: SHIN-KOBE ELECTRIC MACHINERY CO., LTD.
    Inventors: Yoshiaki Machiyama, Keizo Yamada, Yoshifumi Yamada, Takashi Hara
  • Publication number: 20050221191
    Abstract: An object of the present invention is to inhibit intergranular corrosion of a lead alloy by grain refining, and to prolong the life and improve the reliability of a lead battery using the alloy for a positive current collector in the battery. The intergranular corrosion of the lead alloy is inhibited by adding Sr to a Pb—Sn alloy to refine a cast structure and the recrystallized structure of a rolled material, and the hardness is improved by further adding Ca, Ba and Te. In addition, the rolled sheet of the lead alloy is used in the positive current collector of the lead storage battery.
    Type: Application
    Filed: February 10, 2005
    Publication date: October 6, 2005
    Inventors: Yasuo Kondo, Kyoko Honbo, Masanori Sakai, Yasuhisa Aono, Tokiyoshi Hirasawa, Masayuki Terada, Yoshifumi Yamada, Takayuki Kimura
  • Patent number: 6370263
    Abstract: There is disclosed a method of registering palm imprints of individuals to be identified to authenticate the individuals. Each palm imprint is divided into parts having regions with predetermined positions and sizes. Feature points are extracted from the parts of the imprint. The obtained feature information is registered as information for identity of individuals.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: April 9, 2002
    Assignee: NEC Corporation
    Inventors: Seiichi Hiratsuka, Teruhito Amanai, Yoshifumi Yamada
  • Patent number: 5435284
    Abstract: A throttle control apparatus includes a throttle opening adjusting device for regulating the throttle valve opening in such a manner that the throttle valve is located in a first position for assuring sufficient opening of the throttle valve upon ignition, with the throttle valve being rotatable after establishment of ignition or combustion. The throttle valve is then moved to a second position located between the first position and a fully closed position upon an electric failure.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: July 25, 1995
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Masaru Shimizu, Masaharu Hayashi, Mitsuo Kikkawa, Shoichi Doi, Yoshifumi Yamada, Shinichiro Tanaka, Ichiro Hosotani
  • Patent number: 5430711
    Abstract: A group modulator provided a plurality of digitally modulated signals with frequency division multiplex, having a time division multiplexer (11) for multiplexing a plurality of input data (#l through #n). A mapping circuit (12) provides an I-channel signal and a Q-channel signal according to a pattern of the multiplexed signal and the modulation system. A pulse shaping circuit (13) restricts bandwidth of the I-channel signal and the Q-channel signal. A frequency shift circuit (14) shifts frequency of the I-channel signal and the Q-channel signal by the frequency defined by the carrier control signal (i) for each input data. An accumulator (21,22) accumulates each of the I-channel signal and the Q-channel signal of the output of the frequency shift circuit (14) during a predetermined period (T). A D/A converter (31, 32) converts the output of the accumulator from digital form to analog form. A low pass filter (41, 42) is provided at the output of the D/A converter.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: July 4, 1995
    Assignee: Nippon Telegraph & Telephone Corporation
    Inventors: Yoshifumi Yamada, Tadashi Shibato
  • Patent number: 5207714
    Abstract: An exhausted gas recycle device which is installed in an intake manifold is comprised of an inlet portion which penetrates into the intake manifold and communicates with an exhaust manifold and at least one hole formed on the inlet portion in the intake manifold.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: May 4, 1993
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Minoru Hayashi, Nakai Kiyotaka, Yoshifumi Yamada
  • Patent number: 4733873
    Abstract: A mechanical seal, such as may advantageously be used for an automotive water pump or the like, in which the amount of frictional torque is significantly reduced. The seal includes a follower ring through which a rotary shaft rotatably passes and a seat ring rotated by the shaft. Recesses are formed in the abutting surface of at least one of the two rings, each recess being defined by a forward edge and a rear edge and opening only to the inner circumferential surface of the rings. The forward edge of each recess is inclined from the inner circumferential surface to the rear side in the direction of rotation of the follower ring relative to the seat ring, and the rear edge extends from the outer end of the forward edge along a radial line extending through substantially the center of the shaft.
    Type: Grant
    Filed: September 25, 1985
    Date of Patent: March 29, 1988
    Assignees: Taiho Kogyo Co., Ltd., Aisin Seiki Kabushiki Kaisha
    Inventors: Akira Takenaka, Masanori Hatanaka, Kuniharu Suzuki, Junichi Ito, Yoshifumi Yamada, Hironori Yoshida
  • Patent number: 4651098
    Abstract: The phase of nuclear magnetization in a target placed in a homogeneous magnetic field and excited by a high-frequency magnetic field is encoded by applying a specifying magnetic field with a non-linear gradient thereto, and the specifying magnetic field is scanned across the target, and the encoded NMR signals are received and processed so as to produce an image of the distribution of nuclear magnetic substance in the target.
    Type: Grant
    Filed: October 2, 1984
    Date of Patent: March 17, 1987
    Assignee: Utsunomiya University
    Inventors: Yoshifumi Yamada, Kunio Tanaka, Zenwemon Abe
  • Patent number: 4594550
    Abstract: The disclosed method of scanning a specifying magnetic field for nuclear magnetic resonance (NMR) imaging comprises steps of generating the specifying magnetic field by synthesis of a static magnetic field and a magnetic field produced by a group of magnetomotive forces, and moving the center of the specifying magnetic field by superposing a scanning magnetic field from a scanner coil in a certain direction of the magnetic field of the group of magnetomotive forces.
    Type: Grant
    Filed: September 1, 1983
    Date of Patent: June 10, 1986
    Assignee: Utsunomiya University
    Inventors: Yoshifumi Yamada, Kunio Tanaka, Zenwemon Abe
  • Patent number: 4573015
    Abstract: The disclosed method comprises steps of alternately applying a strong static magnetic field and a weak homogeneous static magnetic field to a body being measured (target), selectively exciting nuclear magnetic resonance (NMR) at a specific portion of the target by applying a high-frequency magnetic field and a specifying magnetic field thereto, detecting NMR signals from the thus excited portion, and scanning the target by repeating the selective excitation and the detection.
    Type: Grant
    Filed: August 23, 1983
    Date of Patent: February 25, 1986
    Assignee: Asahikawa Medical College
    Inventors: Zenwemon Abe, Yoshifumi Yamada, Kunio Tanaka