Patents by Inventor Nobuyoshi Yoshida
Nobuyoshi Yoshida 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: 20170009429Abstract: A working machine control system includes: a split-flow fluid pressure pump configured to discharge a working fluid from a first discharge port and a second discharge port; a communication switching valve configured to allow, when one of a first operation valve and a second operation valve is switched, the first discharge port or the second discharge port for one of the first operation valve and the second operation valve that is not switched to communicate with a first neutral passage or a second neutral passage for the other of the first operation valve and the second operation valve that is switched; and a discharge flow rate adjusting device configured to adjust the fluid pressure pump so as to reduce a discharge flow rate of the fluid pressure pump in a case where a switch signal is inputted from any one of the first operation valve and the second operation valve.Type: ApplicationFiled: January 27, 2015Publication date: January 12, 2017Applicant: KYB CorporationInventors: Nobuyoshi YOSHIDA, Ikuo INAGAKI
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Publication number: 20170009430Abstract: A working machine control system includes: a split-flow fluid pressure pump configured to discharge a working fluid from a first discharge port and a second discharge port; a communication switching valve configured to be switched by a switch signal when any one of a first operation valve and a second operation valve is switched so as to allow a first neutral passage and a second neutral passage to communicate with each other; a neutral cut valve configured to be switched by the switch signal so as to block communication between a tank and one of the first neutral passage and the second neutral passage for the first operation valve or the second operation valve that is not switched; and a discharge flow rate adjusting device configured to adjust the fluid pressure pump so as to reduce a discharge flow rate thereof when the switch signal is inputted from any one of the first operation valve and the second operation valve.Type: ApplicationFiled: January 27, 2015Publication date: January 12, 2017Applicant: KYB CorporationInventors: Nobuyoshi YOSHIDA, Ikuo INAGAKI
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Publication number: 20160274486Abstract: An image forming apparatus includes a charging member, a light source, and a light quantity lowering member. The light quantity lowering member is provided so that a lowering amount of a quantity of a part of light reflected by a surface of a member at each of end portions of a charging region where the surface of the image bearing member is charged by the charging member is larger than that at a portion inside an associated end portion with respect to a rotational axis direction of the image bearing member.Type: ApplicationFiled: March 18, 2016Publication date: September 22, 2016Inventors: Koichiro Masui, Nobuyoshi Yoshida
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Publication number: 20160265560Abstract: A working machine control system includes a split flow type fluid pressure pump configured to discharge a working fluid from a first discharge port and a second discharge port, and a lower pressure selection circuit configured to select and communicate with a working fluid of lower pressure among a working fluid on the downstream of a first operation valve of a first neutral passage in a first circuit system to which a working fluid discharged from the first discharge port is supplied, and a working fluid on the downstream of a second operation valve of a second neutral passage in a second circuit system to which a working fluid discharged from the second discharge port is supplied. The fluid pressure pump is adjusted in such a manner that the lower the pressure of the working fluid selected by the lower pressure selection circuit is, the more a discharge flow rate is increased.Type: ApplicationFiled: January 27, 2015Publication date: September 15, 2016Applicant: KYB CorporationInventors: Nobuyoshi YOSHIDA, Ikuo INAGAKI
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Patent number: 9441648Abstract: A control system for a hybrid construction machine includes first and second main pumps, first and second supply passages, first and second circuit systems, a hydraulic motor, a motor generator, an assist pump, a joint passage connected to the assist pump and branching off, first and second logic valves, and a switching valve. The switching valve switches between a state where the assist pump is connected to the second supply passage and a state where the second main pump is connected to the hydraulic motor. A bypass passage branches off from the other branch passage at the downstream of the switching valve. The bypass passage is connected to the second supply passage on the downstream side of the second logic valve.Type: GrantFiled: January 21, 2013Date of Patent: September 13, 2016Assignee: KYB CorporationInventors: Shunsuke Fukuda, Nobuyoshi Yoshida
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Patent number: 9410307Abstract: A hybrid construction machine includes first and second main pumps, first and second supply passages, first and second circuit systems, a hydraulic motor, a motor generator, an assist pump, a joint passage connected to the assist pump and branched off, first and second logic valves, a switching valve disposed in the other branch passage and switchable to a state where the assist pump is connected to the second supply passage on the upstream side of the second logic valve and a state where the second main pump is connected to the hydraulic motor, and a check valve. A poppet diameter of the first logic valve is smaller than that of the second logic valve.Type: GrantFiled: January 24, 2013Date of Patent: August 9, 2016Assignee: KYB CorporationInventors: Shunsuke Fukuda, Nobuyoshi Yoshida
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Patent number: 9280133Abstract: In a development device in which a developer containing unit underlies a development chamber, a supplying member in the development chamber forms a nip portion with a developer carrier and the developer carrier and the supplying member rotate in the direction in which their respective surfaces move from an upper end to a lower end of the nip portion.Type: GrantFiled: April 23, 2013Date of Patent: March 8, 2016Assignee: Canon Kabushiki KaishaInventors: Nobuyoshi Yoshida, Yoshihiro Mitsui, Kodai Hayashi, Yuichiro Hirata, Shinya Yamamoto
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Patent number: 9182699Abstract: A developing device causes toner to be discharged from a foam layer by an intrusion member configured to intrude into the foam layer of a supply roller, and to be supplied to above a contact region between a developing roller and the supply roller.Type: GrantFiled: October 24, 2012Date of Patent: November 10, 2015Assignee: Canon Kabushiki KaishaInventor: Nobuyoshi Yoshida
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Patent number: 9080582Abstract: A circuit pressure control unit includes a relief valve and a variable throttle valve. The relief valve is connected to a connecting passage communicating with an actuator upstream. The variable throttle valve is disposed upstream of the relief valve and is configured to change an opening degree thereof according to a control signal from a controller.Type: GrantFiled: January 21, 2013Date of Patent: July 14, 2015Assignee: KAYABA INDUSTRY CO., LTD.Inventors: Shunsuke Fukuda, Nobuyoshi Yoshida
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Publication number: 20150167856Abstract: A relief valve includes an adjusting piston which is slidable by the action of a pilot pressure, a pilot poppet on which a spring force of a setting spring adjusted by a sliding movement of the adjusting piston acts in a valve closing direction, a spring chamber into which a spring for exerting a spring force opposing the pilot pressure is incorporated, and an air vent hole which is formed in the spring chamber and exposes the spring chamber to outside.Type: ApplicationFiled: December 26, 2012Publication date: June 18, 2015Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Nobuyoshi Yoshida, Junichi Ono
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Patent number: 9057976Abstract: An image forming apparatus includes a control unit controlling first and second voltage application mechanisms and shifting a difference Vdif (=Vrs?Vdr) between Vrs and Vdr toward polarity opposite to normal charge polarity of a developer as S decreases, where S is an absolute value of a speed difference between a circumferential speed of an image bearing member, which rotates while bearing an electrostatic latent image and a circumferential speed of a developer bearing member, which rotates at a constant circumferential speed ratio with respect to the image bearing member to develop the electrostatic latent image while bearing the developer, Vdr is a voltage that the first voltage application mechanism applies to the developer bearing member, and Vrs is a voltage that the second voltage application mechanism applies to the developer supply member.Type: GrantFiled: October 23, 2013Date of Patent: June 16, 2015Assignee: Canon Kabushiki KaishaInventors: Nobuyoshi Yoshida, Yoshihiro Mitsui, Kodai Hayashi, Hisashi Taniguchi
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Patent number: 9052678Abstract: A cleaning device includes a fixing portion provided on a frame, a cleaning member, and an accommodating portion. The cleaning member includes a blade portion contacted to an image bearing member (drum) and a supporting member. The supporting member includes one end portion where the blade portion is provided, another end portion including a portion-to-be-fixed for being fixed at the fixing portion, and a bent portion between the one end portion and the other end portion in a side remote from a surface of the drum toward an outside with respect to a line connecting the portion-to-be-fixed and a contact portion where the blade portion is contacted to the drum. The portion-to-be-fixed is provided downstream of the contact portion with respect to movement direction of the drum. Between the frame and the other end portion, a gap for permitting elastic deformation of the other end portion is provided.Type: GrantFiled: August 29, 2012Date of Patent: June 9, 2015Assignee: Canon Kabushiki KaishaInventors: Hideto Oka, Masao Uyama, Kenji Shindo, Nobuyoshi Yoshida, Ryosuke Kanai, Satoru Inami
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Publication number: 20150033727Abstract: A hybrid construction machine includes first and second main pumps, first and second supply passages, first and second circuit systems, a hydraulic motor, a motor generator, an assist pump, a joint passage connected to the assist pump and branched off, first and second logic valves, a switching valve disposed in the other branch passage and switchable to a state where the assist pump is connected to the second supply passage on the upstream side of the second logic valve and a state where the second main pump is connected to the hydraulic motor, and a check valve. A poppet diameter of the first logic valve is smaller than that of the second logic valve.Type: ApplicationFiled: January 24, 2013Publication date: February 5, 2015Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Shunsuke Fukuda, Nobuyoshi Yoshida
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Publication number: 20150033726Abstract: A hybrid construction machine includes first and second main pumps, first and second supply passages, first and second circuit systems, a hydraulic motor, a motor generator, an assist pump, a joint passage connected to the assist pump and branching off, first and second logic valves, and a switching valve. The switching valve switches between a state where the assist pump is connected to the second supply passage and a state where the second main pump is connected to the hydraulic motor. The hybrid construction machine includes a bypass passage branching off from the other branch passage at the downstream of the switching valve. The bypass passage is connected to the second supply passage on the downstream side of the second logic valve.Type: ApplicationFiled: January 21, 2013Publication date: February 5, 2015Applicant: KAYABA INDUSTRY CO., LTDInventors: Shunsuke Fukuda, Nobuyoshi Yoshida
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Publication number: 20150013323Abstract: A circuit pressure control unit includes a relief valve and a variable throttle valve. The relief valve is connected to a connecting passage communicating with an actuator upstream. The variable throttle valve is disposed upstream of the relief valve and is configured to change an opening degree thereof according to a control signal from a controller.Type: ApplicationFiled: January 21, 2013Publication date: January 15, 2015Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Shunsuke Fukuda, Nobuyoshi Yoshida
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Patent number: 8913929Abstract: A developing device for use with an image forming apparatus, includes a developing roller for carrying a developer and for forming a developer image on an image bearing member; a supplying roller for supplying the developer to the developing roller, wherein the supplying roller has a foam layer at its surface and forms a nip between itself and the developing roller; an accommodating portion, provided below the supplying roller, for accommodating the developer; and a feeding member for feeding the developer from the accommodating portion to a location above the nip by being rotated in a direction opposite to a rotational direction of the supplying roller. The supplying roller is rotated in a direction which is from a lower end of the nip to an upper end of the nip. The supplying roller is provided so that its top is higher than a top of the developing roller.Type: GrantFiled: July 19, 2012Date of Patent: December 16, 2014Assignee: Canon Kabushiki KaishaInventors: Hirokazu Fujino, Nobuyoshi Yoshida
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Publication number: 20140153990Abstract: A cleaning device includes: a fixing portion provided on a frame; a cleaning member; and an accommodating portion. The cleaning member includes: a blade portion contacted to an image bearing member (drum); and a supporting member. The supporting member includes one end portion where the blade portion is provided, another end portion including a portion-to-be-fixed for being fixed at the fixing portion, and a bent portion between the one end portion and the another end portion in a side remote from a surface of the drum toward an outside with respect to a line connecting the portion-to-be-fixed and a contact portion where the blade portion is contacted to the drum. The portion-to-be-fixed is provided downstream of the contact portion with respect to movement direction of the drum. Between the frame and the another end portion, a gap for permitting elastic deformation of the another end portion is provided.Type: ApplicationFiled: August 29, 2012Publication date: June 5, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Hideto Oka, Masao Uyama, Kenji Shindo, Nobuyoshi Yoshida, Ryosuke Kanai, Satoru Inami
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Publication number: 20140119757Abstract: An image forming apparatus includes a control unit controlling first and second voltage application mechanisms and shifting a difference Vdif (=Vrs?Vdr) between Vrs and Vdr toward polarity opposite to normal charge polarity of a developer as S decreases, where S is an absolute value of a speed difference between a circumferential speed of an image bearing member, which rotates while bearing an electrostatic latent image and a circumferential speed of a developer bearing member, which rotates at a constant circumferential speed ratio with respect to the image bearing member to develop the electrostatic latent image while bearing the developer, Vdr is a voltage that the first voltage application mechanism applies to the developer bearing member, and Vrs is a voltage that the second voltage application mechanism applies to the developer supply member.Type: ApplicationFiled: October 23, 2013Publication date: May 1, 2014Inventors: Nobuyoshi Yoshida, Yoshihiro Mitsui, Kodai Hayashi, Hisashi Taniguchi
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Publication number: 20130287451Abstract: A developing roller configured to develop an electrostatic latent image on a photosensitive drum, a supply roller configured to supply developer to the developing roller are provided, and the surface of the developing roller moves in the same direction as the surface of the photosensitive drum and at a speed higher than the photosensitive drum at a nip portion between the photosensitive drum and the developing roller, the surface of the supply roller moves in the same direction as the surface of the developing roller and at a speed higher than the developing roller at a nip portion between the developing roller and the supply roller.Type: ApplicationFiled: April 23, 2013Publication date: October 31, 2013Inventors: Shinya Yamamoto, Kodai Hayashi, Hisashi Taniguchi, Naoki Fukushima, Yuichiro Hirata, Nobuyoshi Yoshida
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Publication number: 20130287452Abstract: In a development device in which a developer containing unit underlies a development chamber, a supplying member in the development chamber forms a nip portion with a developer carrier and the developer carrier and the supplying member rotate in the direction in which their respective surfaces move from an upper end to a lower end of the nip portion.Type: ApplicationFiled: April 23, 2013Publication date: October 31, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Nobuyoshi Yoshida, Yoshihiro Mitsui, Kodai Hayashi, Yuichiro Hirata, Shinya Yamamoto