Patents by Inventor Kazuhiko Kanno
Kazuhiko Kanno 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: 20240319663Abstract: A cartridge includes a developing roller rotatable about a rotational axis thereof and a movable lever. A coupling member is operatively connected to the developing roller, with the coupling member being movable, in response to a movement of the lever, between (a) a first position in which the coupling member is exposed to outside of the cartridge, and (b) a second position. The coupling member is provided at a first end portion on a first side of the cartridge. In a direction of the rotational axis of the developing roller, the first position is farther from a second end potion provided on a second side of the cartridge that is opposite to the first end portion on the first side of the cartridge than the second position is from the second end portion on the second side of the cartridge.Type: ApplicationFiled: May 31, 2024Publication date: September 26, 2024Inventors: Masaaki Sato, Kazuhiko Kanno, Satoshi Nishiya, Masatoshi Yamashita
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Patent number: 12050432Abstract: A process cartridge includes a photosensitive drum, a developing roller, and a movable lever. The process cartridge also includes a coupling member operatively connected to the developing roller, with the coupling member being movable in response to a movement of the lever. The process cartridge is configured such that, when the process cartridge is oriented with the photosensitive drum and the developing roller positioned at a downward side of the process cartridge, an end of the lever is positioned lower than a rotational axis of the photosensitive drum and a rotational axis of the developing roller.Type: GrantFiled: February 16, 2023Date of Patent: July 30, 2024Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Kazuhiko Kanno, Satoshi Nishiya, Masatoshi Yamashita
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Patent number: 11960237Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting tType: GrantFiled: July 11, 2022Date of Patent: April 16, 2024Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Masatoshi Yamashita, Satoshi Nishiya, Kazuhiko Kanno
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Publication number: 20240069489Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting tType: ApplicationFiled: November 9, 2023Publication date: February 29, 2024Inventors: Masaaki Sato, Masatoshi Yamashita, Satoshi Nishiya, Kazuhiko Kanno
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Patent number: 11874627Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting tType: GrantFiled: July 11, 2022Date of Patent: January 16, 2024Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Masatoshi Yamashita, Satoshi Nishiya, Kazuhiko Kanno
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Publication number: 20230195031Abstract: A process cartridge includes a photosensitive drum, a developing roller, and a movable lever. The process cartridge also includes a coupling member operatively connected to the developing roller, with the coupling member being movable in response to a movement of the lever. The process cartridge is configured such that, when the process cartridge is oriented with the photosensitive drum and the developing roller positioned at a downward side of the process cartridge, an end of the lever is positioned lower than a rotational axis of the photosensitive drum and a rotational axis of the developing roller. A process cartridge includes a photosensitive drum, a developing roller, and a movable lever. The process cartridge also includes a coupling member operatively connected to the developing roller, with the coupling member being movable in response to a movement of the lever.Type: ApplicationFiled: February 16, 2023Publication date: June 22, 2023Inventors: Masaaki Sato, Kazuhiko Kanno, Satoshi Nishiya, Masatoshi Yamashita
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Patent number: 11614710Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a rotatable photosensitive drum; a rotatable developing roller configured to develop image formed on the drum, the developing roller being capable of contacting to and spacing from the drum; an urging force receiving portion configured to receive, from a main assembly side urging member, an urging force for spacing the developing roller from the drum; a cartridge side drive transmission member capable of the coupling with a main assembly side drive transmission member and configured to receive, from the main assembly side drive transmission member, a rotational force for rotating the developing roller; and a decoupling member capable of urging the cartridge side drive transmission member by the urging force received by the urging force receiving portion to decouple the cartridge side drive transmission member from the main assembly side drive transmission member.Type: GrantFiled: May 24, 2022Date of Patent: March 28, 2023Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Kazuhiko Kanno, Satoshi Nishiya, Masatoshi Yamashita
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Patent number: 11520284Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting tType: GrantFiled: March 1, 2021Date of Patent: December 6, 2022Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Masatoshi Yamashita, Satoshi Nishiya, Kazuhiko Kanno
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Publication number: 20220350292Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting tType: ApplicationFiled: July 11, 2022Publication date: November 3, 2022Inventors: Masaaki Sato, Masatoshi Yamashita, Satoshi Nishiya, Kazuhiko Kanno
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Patent number: 11474478Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting tType: GrantFiled: March 1, 2021Date of Patent: October 18, 2022Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Masatoshi Yamashita, Satoshi Nishiya, Kazuhiko Kanno
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Patent number: 11442406Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting tType: GrantFiled: March 1, 2021Date of Patent: September 13, 2022Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Masatoshi Yamashita, Satoshi Nishiya, Kazuhiko Kanno
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Publication number: 20220283538Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a rotatable photosensitive drum; a rotatable developing roller configured to develop image formed on the drum, the developing roller being capable of contacting to and spacing from the drum; an urging force receiving portion configured to receive, from a main assembly side urging member, an urging force for spacing the developing roller from the drum; a cartridge side drive transmission member capable of the coupling with a main assembly side drive transmission member and configured to receive, from the main assembly side drive transmission member, a rotational force for rotating the developing roller; and a decoupling member capable of urging the cartridge side drive transmission member by the urging force received by the urging force receiving portion to decouple the cartridge side drive transmission member from the main assembly side drive transmission member.Type: ApplicationFiled: May 24, 2022Publication date: September 8, 2022Inventors: Masaaki Sato, Kazuhiko Kanno, Satoshi Nishiya, Masatoshi Yamashita
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Patent number: 11385593Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a rotatable photosensitive drum; a rotatable developing roller configured to develop image formed on the drum, the developing roller being capable of contacting to and spacing from the drum; an urging force receiving portion configured to receive, from a main assembly side urging member, an urging force for spacing the developing roller from the drum; a cartridge side drive transmission member capable of the coupling with a main assembly side drive transmission member and configured to receive, from the main assembly side drive transmission member, a rotational force for rotating the developing roller; and a decoupling member capable of urging the cartridge side drive transmission member by the urging force received by the urging force receiving portion to decouple the cartridge side drive transmission member from the main assembly side drive transmission member.Type: GrantFiled: December 8, 2020Date of Patent: July 12, 2022Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Kazuhiko Kanno, Satoshi Nishiya, Masatoshi Yamashita
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Patent number: 11111875Abstract: In a sliding structure for an internal combustion, a cylinder has recesses in a stroke center region. Piston rings have inclined surfaces on an outer circumferential surface, and a lubricating oil flows between the inner wall surface and the outer circumferential surface that relatively move via the inclined surfaces. At any RPM equal to or greater than at idle, a center friction coefficient at the stroke center region through which the piston rings pass at the highest speed is less than a center friction coefficient when no recesses are formed in the stroke center region. Contrarily, at the RPM, an outside friction coefficient when the piston rings pass through a region outside the stroke center region is less than an outside friction coefficient when the recesses are formed in the outside region. As a result, further improved low fuel efficiency is achieved for the dimple liner technique.Type: GrantFiled: May 30, 2017Date of Patent: September 7, 2021Inventors: Mitsuru Urabe, Hirokazu Murata, Kazuhiko Kanno, Jyuta Tase, Kazumi Moroi
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Patent number: 11112751Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a rotatable photosensitive drum; a rotatable developing roller configured to develop image formed on the drum, the developing roller being capable of contacting to and spacing from the drum; an urging force receiving portion configured to receive, from a main assembly side urging member, an urging force for spacing the developing roller from the drum; a cartridge side drive transmission member capable of the coupling with a main assembly side drive transmission member and configured to receive, from the main assembly side drive transmission member, a rotational force for rotating the developing roller; and a decoupling member capable of urging the cartridge side drive transmission member by the urging force received by the urging force receiving portion to decouple the cartridge side drive transmission member from the main assembly side drive transmission member.Type: GrantFiled: March 4, 2021Date of Patent: September 7, 2021Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Kazuhiko Kanno, Satoshi Nishiya, Masatoshi Yamashita
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Publication number: 20210191312Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a rotatable photosensitive drum; a rotatable developing roller configured to develop image formed on the drum, the developing roller being capable of contacting to and spacing from the drum; an urging force receiving portion configured to receive, from a main assembly side urging member, an urging force for spacing the developing roller from the drum; a cartridge side drive transmission member capable of the coupling with a main assembly side drive transmission member and configured to receive, from the main assembly side drive transmission member, a rotational force for rotating the developing roller; and a decoupling member capable of urging the cartridge side drive transmission member by the urging force received by the urging force receiving portion to decouple the cartridge side drive transmission member from the main assembly side drive transmission member.Type: ApplicationFiled: March 4, 2021Publication date: June 24, 2021Inventors: Masaaki Sato, Kazuhiko Kanno, Satoshi Nishiya, Masatoshi Yamashita
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Publication number: 20210191314Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting tType: ApplicationFiled: March 1, 2021Publication date: June 24, 2021Inventors: Masaaki Sato, Masatoshi Yamashita, Satoshi Nishiya, Kazuhiko Kanno
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Patent number: 11016438Abstract: A cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes a rotatable member capable of carrying developer, the rotatable member being rotatable about a rotational axis thereof. The cartridge also includes a coupling member provided at one end portion of the cartridge with respect to a rotational axis direction of the rotatable member, the coupling member including at least one projection and being configured to transmit a rotational force to the rotatable member. A holding member holds the coupling member, and two pins support the holding member, with each of the two pins including a shaft portion elongated in a direction substantially perpendicular to the rotational axis of the rotatable member and the two pins being disposed substantially parallel to each other.Type: GrantFiled: July 17, 2020Date of Patent: May 25, 2021Assignee: Canon Kabushiki KaishaInventors: Shigemi Kamoshida, Takuya Kawakami, Hiroki Ogino, Kazuhiko Kanno
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Patent number: 10996623Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting tType: GrantFiled: December 20, 2019Date of Patent: May 4, 2021Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Masatoshi Yamashita, Satoshi Nishiya, Kazuhiko Kanno
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Publication number: 20210088965Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a rotatable photosensitive drum; a rotatable developing roller configured to develop image formed on the drum, the developing roller being capable of contacting to and spacing from the drum; an urging force receiving portion configured to receive, from a main assembly side urging member, an urging force for spacing the developing roller from the drum; a cartridge side drive transmission member capable of the coupling with a main assembly side drive transmission member and configured to receive, from the main assembly side drive transmission member, a rotational force for rotating the developing roller; and a decoupling member capable of urging the cartridge side drive transmission member by the urging force received by the urging force receiving portion to decouple the cartridge side drive transmission member from the main assembly side drive transmission member.Type: ApplicationFiled: December 8, 2020Publication date: March 25, 2021Inventors: Masaaki Sato, Kazuhiko Kanno, Satoshi Nishiya, Masatoshi Yamashita