Patents by Inventor Yoshitsugu Kimura
Yoshitsugu Kimura 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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Publication number: 20240071861Abstract: A semiconductor device includes a semiconductor element, a wiring member, a sintered member between a first main electrode of the semiconductor element and the wiring member, and a sealing body. The wiring member includes a base material, a metal film on a face of the base material, and an uneven oxide film. The uneven oxide film includes a thick film portion and a thin film portion. An opposing face of the wiring member opposing the semiconductor element includes a mounting portion to which the first main electrode is bonded, an outer peripheral portion formed with the thick film portion and surrounding the semiconductor element, and an intermediate portion formed with the thin film portion between the mounting portion and the outer peripheral portion. The sintered member overlaps with the mounting portion and the intermediate portion in the plan view, and is in contact with the thin film portion.Type: ApplicationFiled: November 8, 2023Publication date: February 29, 2024Inventors: Ryo KIMURA, Yuji KOJIMA, Takashi SATO, Yoshitsugu SAKAMOTO, Tomomi OKUMURA
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Patent number: 10054864Abstract: A toner including a binder resin, wherein a toner extract obtained by drying an extraction liquid obtained through Soxhlet extraction of the toner with tetrahydrofuran (THF) has glass transition temperature Tg in a range of from 35° C. through 55° C., and a moisture-content change rate of the toner extract before and after leaving the toner extract to stand for 3 days in an environment of 40° C. and 70% RH is 0.5% or less, and wherein a specific-surface-area change rate of the toner before and after leaving the toner to stand for 3 days in an environment of 40° C. and 70% RH is in a range of from 15% through 50%.Type: GrantFiled: January 4, 2016Date of Patent: August 21, 2018Assignee: Ricoh Company, Ltd.Inventors: Tomoki Murayama, Ryota Inoue, Masana Shiba, Daisuke Inoue, Junichi Awamura, Yoshitsugu Kimura, Rintaro Takahashi
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Patent number: 9989869Abstract: A toner comprising a binder resin and a release agent, wherein the toner has a difference of 30 or less between a maximum value and a minimum value among peak intensities in a range of Molecular weight M±300 where Molecular weight M is a molecular weight selected from a range of from 300 through 5,000 in a molecular weight distribution of tetrahydrofuran (THF)-soluble components in the toner as measured by gel permeation chromatography (GPC), and wherein the peak intensities are defined as relative values assuming a maximum peak value in molecular weights of 20,000 or less is 100, in a molecular weight distribution curve taking an intensity as a vertical axis and a molecular weight as a horizontal axis as measured by GPC.Type: GrantFiled: January 5, 2016Date of Patent: June 5, 2018Assignee: Ricoh Company, Ltd.Inventors: Daisuke Inoue, Naohiro Watanabe, Ryota Inoue, Masana Shiba, Junichi Awamura, Shingo Sakashita, Tomoki Murayama, Yoshitsugu Kimura, Rintaro Takahashi, Akio Takei
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Publication number: 20180052403Abstract: A toner comprising a binder resin and a release agent, wherein the toner has a difference of 30 or less between a maximum value and a minimum value among peak intensities in a range of Molecular weight M±300 where Molecular weight M is a molecular weight selected from a range of from 300 through 5,000 in a molecular weight distribution of tetrahydrofuran (THF)-soluble components in the toner as measured by gel permeation chromatography (GPC), and wherein the peak intensities are defined as relative values assuming a maximum peak value in molecular weights of 20,000 or less is 100, in a molecular weight distribution curve taking an intensity as a vertical axis and a molecular weight as a horizontal axis as measured by GPC.Type: ApplicationFiled: January 5, 2016Publication date: February 22, 2018Inventors: Daisuke INOUE, Naohiro WATANABE, Ryota INOUE, Masana SHIBA, Junichi AWAMURA, Shingo SAKASHITA, Tomoki MURAYAMA, Yoshitsugu KIMURA, Rintaro TAKAHASHI, Akio TAKEI
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Patent number: 9709911Abstract: A toner including a binder resin and a release agent, wherein the toner has a component soluble in a 50% by mass aqueous methanol solution in an amount of 0.10% by mass to 0.60% by mass, and wherein the toner has a flowing-out beginning temperature (Tfb) of 55.0° C. to 100.0° C. as determined by a flowtester method.Type: GrantFiled: December 30, 2015Date of Patent: July 18, 2017Assignee: Ricoh Company, Ltd.Inventors: Yoshitsugu Kimura, Ryota Inoue, Masana Shiba, Daisuke Inoue, Tomoki Murayama, Rintaro Takahashi
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Publication number: 20160195826Abstract: A toner including a binder resin and a release agent, wherein the toner has a component soluble in a 50% by mass aqueous methanol solution in an amount of 0.10% by mass to 0.60% by mass, and wherein the toner has a flowing-out beginning temperature (Tfb) of 55.0° C. to 100.0° C. as determined by a flowtester method.Type: ApplicationFiled: December 30, 2015Publication date: July 7, 2016Inventors: Yoshitsugu KIMURA, Ryota INOUE, Masana SHIBA, Daisuke INOUE, Tomoki MURAYAMA, Rintaro TAKAHASHI
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Publication number: 20160195827Abstract: A toner including a binder resin, wherein a toner extract obtained by drying an extraction liquid obtained through Soxhlet extraction of the toner with tetrahydrofuran (THF) has glass transition temperature Tg in a range of from 35° C. through 55° C., and a moisture-content change rate of the toner extract before and after leaving the toner extract to stand for 3 days in an environment of 40° C. and 70% RH is 0.5% or less, and wherein a specific-surface-area change rate of the toner before and after leaving the toner to stand for 3 days in an environment of 40° C. and 70% RH is in a range of from 15% through 50%.Type: ApplicationFiled: January 4, 2016Publication date: July 7, 2016Inventors: Tomoki Murayama, Ryota Inoue, Masana Shiba, Daisuke Inoue, Junichi Awamura, Yoshitsugu Kimura, Rintaro Takahashi
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Patent number: 5779283Abstract: A pipe joint unit having key members which are struck to bite the surfaces of the pipes is provided with which the pipes can easily and quickly be joined to the body of the pipe joint unit with small force, without skill and regardless of the person who drive the key member. The pipe joint unit according to the present invention includes a body of the pipe joint unit having through holes each of which faces a portion of an inserted pipe in a direction of a tangent line; and key members to be driven into the through holes, wherein each of the key members has a tapered portion which is brought into contact with the surface of the pipe in an initial stage of a driving operation and which bites the surface of the pipe as the driving operation proceeds, and a secured portion to be secured to the bitten portion.Type: GrantFiled: April 10, 1996Date of Patent: July 14, 1998Assignee: Takenaka CorporationInventors: Yoshitsugu Kimura, Motonori Onoshi, Yasuharu Sakaguchi, Keitaro Watanabe
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Patent number: 5122715Abstract: A brushless motor driving device includes a plurality of motor driving coils and a plurality of driving transistors, coupled to the motor driving coils, for periodically supplying an electric power to the motor driving coils. A power supply switching circuit is provided for generating a power supply switching signal for driving the motor driving coils on the basis of a frequency signal corresponding to an oscillation frequency of a voltage controlled oscillator. A phase difference detector is provided for detecting a difference between the power supply switching signal and a counterelectromotive voltage generated in the motor driving coils during a period in which no electric power is supplied to the motor driving coils. The phase difference detected by the phase different detector circuit is used to control the oscillation frequency of the voltage controlled oscillator.Type: GrantFiled: July 19, 1989Date of Patent: June 16, 1992Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshitsugu Kimura, Masahiro Yasohara, Hiromitsu Nakano
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Patent number: 4970445Abstract: The present invention relates to a drive device for a brushless motor utilizing no position detector for detecting the position of a movable element of the motor.The drive device comprises a phase controlled loop for controlling an output of a voltage controlled oscillator (40) by supplying an electric power to motor driving coils (1, 2, 3), detecting the difference in phase between the power supply waveforms thereof and a counterrelectromotive force of the motor driving coils during a power supply interrupting period with the use of a phase difference detector (20) and inputting a detected phase difference signal to the voltage controlled oscillator (40), an oscillation frequency initializing means (70) and a driving transistor interrupting circuit (80).Type: GrantFiled: June 22, 1989Date of Patent: November 13, 1990Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshitsugu Kimura, Masahiro Yasohara, Hiromitsu Nakano
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Patent number: 4900993Abstract: A phase difference between a counter-electromotive voltage induced in a driving coil and a voltage which is applied to the driving coil is detected by comparison of a terminal voltage of the driving coil and a reference voltage. A frequency of a voltage-control oscillator which controls switching of the voltage applied to the driving coil is varied by an output signal made by the comparison, and the phase difference is controlled to be reduced to zero.Type: GrantFiled: June 16, 1988Date of Patent: February 13, 1990Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahiro Yasohara, Yoshitsugu Kimura, Hiromitsu Nakano