Patents by Inventor Chiaki Nemoto
Chiaki Nemoto 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: 20240092966Abstract: A polylactic acid resin composition includes a polylactic acid resin in an amount of 99% by mass or more. A complex viscosity ?*(20) of the polylactic acid resin composition is 2×103 Pa·s or higher. A ratio of the complex viscosity ?*(20) to a complex viscosity ?*(5), which is represented by [?*(20)/?*(5)], is 0.6 or higher. The complex viscosity ?*(5) and the complex viscosity ?*(20) are complex viscosities respectively measured 5 minutes and 20 minutes after the start of measurement using a parallel plate-type rotary viscometer under measurement conditions below: [Measurement Conditions] Parallel plates: 20 mm in diameter, made of aluminum; Temperature: 200° C.; Gap between the parallel plates: 1.00 mm; Frequency: 1 Hz (6.28 rad/s); Atmosphere: under dry air (dew point: ?60° C.); and Size of measurement sample: a strip that is 30 ?m thick, 7 mm wide, and 35 mm long.Type: ApplicationFiled: September 6, 2023Publication date: March 21, 2024Applicant: Ricoh Company, Ltd.Inventors: Taichi NEMOTO, Chiaki Tanaka, Yuichi Sato
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Patent number: 9762820Abstract: An imaging device includes: an image pickup element; a focal plane shutter including: a board including an opening exposing the image pickup element; a leading shutter and a trailing shutter movable between a closed position to close the opening and an opened position to open the opening; and a leading shutter actuator and a trailing shutter actuator respectively driving the leading shutter and the trailing shutter, a drive control portion that drives the leading shutter actuator and the trailing shutter actuator; and a control portion that controls the image pickup element.Type: GrantFiled: August 4, 2015Date of Patent: September 12, 2017Assignee: SEIKO PRECISION INC.Inventors: Hiroshi Takahashi, Chiaki Nemoto, Yoichi Nakano
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Patent number: 9632394Abstract: An image pickup device includes: a focal plane shutter including: a board including an opening; a shutter moving to open and close the opening; an actuator moving the shutter; and a detection portion detecting that the shutter passes through a predetermined position, an image pickup element which light enters through the opening; and a drive control portion that controls the actuator to move the shutter, wherein the drive control portion performs movement control to move the shutter at least until the shutter passes through the predetermined position, and performs brake control to decelerate the shutter while the shutter is moving after the shutter passes through the predetermined position.Type: GrantFiled: July 9, 2015Date of Patent: April 25, 2017Assignee: SEIKO PRECISION INC.Inventors: Chiaki Nemoto, Hiroshi Takahashi, Shoichi Tokura, Yoichi Nakano, Motoharu Sakurai
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Patent number: 9507240Abstract: A blade drive device includes: a board including an opening; first and second blades opening and closing the opening; and first and second actuators arranged adjacent to each other and respectively driving the first and second blades, wherein the first and second actuators respectively include first and second stators, first and second rotors, and first and second coils, and the first and second rotors is arranged to sandwich at least one of the first and second coils.Type: GrantFiled: August 27, 2014Date of Patent: November 29, 2016Assignee: SEIKO PRECISION INC.Inventors: Hiroshi Takahashi, Shoichi Tokura, Chiaki Nemoto, Yoichi Nakano
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Patent number: 9429815Abstract: A blade drive device includes: a board including an opening; first and second blades opening and closing the opening; and first and second actuators respectively driving the first and second blades, wherein the first and second actuators respectively include first and second stators, first and second rotors, and first and second coils, and respectively drive the first and second blades through first and second drive members, the first drive member is arranged to overlap the first stator and the first coil in an optical axis direction, and the second drive member is arranged to overlap the second stator and the second coil in the optical axis direction.Type: GrantFiled: October 30, 2014Date of Patent: August 30, 2016Assignee: SEIKO PRECISION INC.Inventors: Hiroshi Takahashi, Shoichi Tokura, Chiaki Nemoto, Yoichi Nakano
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Publication number: 20150341574Abstract: An imaging device includes: an image pickup element; a focal plane shutter including: a board including an opening exposing the image pickup element; a leading shutter and a trailing shutter movable between a closed position to close the opening and an opened position to open the opening; and a leading shutter actuator and a trailing shutter actuator respectively driving the leading shutter and the trailing shutter, a drive control portion that drives the leading shutter actuator and the trailing shutter actuator; and a control portion that controls the image pickup element.Type: ApplicationFiled: August 4, 2015Publication date: November 26, 2015Applicant: SEIKO PRECISION INC.Inventors: Hiroshi TAKAHASHI, Chiaki NEMOTO, Yoichi NAKANO
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Publication number: 20150309387Abstract: An image pickup device includes: a focal plane shutter including: a board including an opening; a shutter moving to open and close the opening; an actuator moving the shutter; and a detection portion detecting that the shutter passes through a predetermined position, an image pickup element which light enters through the opening; and a drive control portion that controls the actuator to move the shutter, wherein the drive control portion performs movement control to move the shutter at least until the shutter passes through the predetermined position, and performs brake control to decelerate the shutter while the shutter is moving after the shutter passes through the predetermined position.Type: ApplicationFiled: July 9, 2015Publication date: October 29, 2015Inventors: Chiaki NEMOTO, Hiroshi TAKAHASHI, Shoichi TOKURA, Yoichi NAKANO, Motoharu SAKURAI
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Publication number: 20150050014Abstract: A blade drive device includes: a board including an opening; first and second blades opening and closing the opening; and first and second actuators respectively driving the first and second blades, wherein the first and second actuators respectively include first and second stators, first and second rotors, and first and second coils, and respectively drive the first and second blades through first and second drive members, the first drive member is arranged to overlap the first stator and the first coil in an optical axis direction, and the second drive member is arranged to overlap the second stator and the second coil in the optical axis direction.Type: ApplicationFiled: October 30, 2014Publication date: February 19, 2015Applicant: SEIKO PRECISION INC.Inventors: Hiroshi TAKAHASHI, Shoichi TOKURA, Chiaki NEMOTO, Yoichi NAKANO
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Publication number: 20140369675Abstract: A blade drive device includes: a board including an opening; first and second blades opening and closing the opening; and first and second actuators arranged adjacent to each other and respectively driving the first and second blades, wherein the first and second actuators respectively include first and second stators, first and second rotors, and first and second coils, and the first and second rotors is arranged to sandwich at least one of the first and second coils.Type: ApplicationFiled: August 27, 2014Publication date: December 18, 2014Applicant: SEIKO PRECISION INC.Inventors: Hiroshi TAKAHASHI, Shoichi Tokura, Chiaki Nemoto, Yoichi Nakano
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Patent number: 8807853Abstract: A focal plane shutter includes: a board including an opening; a leading blade and a trailing blade opening and closing the opening; first and second drive members respectively driving the leading blade and the trailing blade; first and second actuators respectively driving the first and second drive members; a first biasing member biasing the first drive member to move the leading blade away from the opening; and a second biasing member biasing the second drive member to move the trailing blade away from the opening.Type: GrantFiled: September 11, 2013Date of Patent: August 19, 2014Assignee: Seiko Precision Inc.Inventors: Hiroshi Takahashi, Minori Murata, Chiaki Nemoto, Shoichi Tokura
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Publication number: 20140010526Abstract: A focal plane shutter includes: a board including an opening; a leading blade and a trailing blade opening and closing the opening; first and second drive members respectively driving the leading blade and the trailing blade; first and second actuators respectively driving the first and second drive members; a first biasing member biasing the first drive member to move the leading blade away from the opening; and a second biasing member biasing the second drive member to move the trailing blade away from the opening.Type: ApplicationFiled: September 11, 2013Publication date: January 9, 2014Applicant: SEIKO PRECISION INC.Inventors: Hiroshi TAKAHASHI, Minori MURATA, Chiaki NEMOTO, Shoichi TOKURA
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Patent number: 8485742Abstract: A focal plane shutter includes: a board including an opening; blades capable of opening and closing the opening; a drive lever swingably supported, holding a movable iron piece and driving the blades; a self-holding type solenoid capable of adsorbing to the movable iron piece by a given attraction force in a non-energized state, and reducing the given attraction force in an energized state; a biasing member biasing the drive lever to move the drive lever away from the self-holding type solenoid; and a set member moving the drive lever to abut the drive lever with the self-holding type solenoid, wherein the self-holding type solenoid is energized to reduce the given attraction force when the drive lever is swung by the set member to abut the movable iron piece with the self-holding type solenoid.Type: GrantFiled: November 8, 2011Date of Patent: July 16, 2013Assignee: Seiko Precision Inc.Inventors: Yoichi Nakano, Makoto Mikami, Chiaki Nemoto
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Publication number: 20120249849Abstract: An image pickup device includes: an image pickup element; a control portion sequentially resetting charge stored in the image pickup element for every pixel line in a predetermined direction such that an electronic leading shutter moves in a simulated manner; a focal plane shutter including: a board including an opening; a mechanical type of a trailing shutter capable of opening and closing the opening; an actuator driving the trailing shutter; and a detection portion detecting that the trailing shutter passes through a given position of a movement trace of the trailing shutter; and a drive control portion controlling driving of the actuator based on a detection result of the detection portion.Type: ApplicationFiled: March 27, 2012Publication date: October 4, 2012Applicant: SEIKO PRECISION INC.Inventors: Yoichi NAKANO, Chiaki Nemoto
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Publication number: 20120134660Abstract: A focal plane shutter includes: a board including an opening; blades capable of opening and closing the opening; a drive lever swingably supported, holding a movable iron piece and driving the blades; a self-holding type solenoid capable of adsorbing to the movable iron piece by a given attraction force in a non-energized state, and reducing the given attraction force in an energized state; a biasing member biasing the drive lever to move the drive lever away from the self-holding type solenoid; and a set member moving the drive lever to abut the drive lever with the self-holding type solenoid, wherein the self-holding type solenoid is energized to reduce the given attraction force when the drive lever is swung by the set member to abut the movable iron piece with the self-holding type solenoid.Type: ApplicationFiled: November 8, 2011Publication date: May 31, 2012Applicant: SEIKO PRECISION INC.Inventors: Yoichi NAKANO, Makoto Mikami, Chiaki Nemoto
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Patent number: 7896561Abstract: A focal plane shutter includes: a shutter substrate having an opening; a blade for opening and closing the opening; a drive member swingably supported for driving the blade; a drive spring for driving the drive member; and an adjustment mechanism for adjusting an urging force of the drive spring. One end of the drive spring is engaged with the drive member. The adjustment mechanism includes: an adjustment member engaging the other end of the drive spring and rotatably supported to adjust the urging force of the drive spring; and an engagement member abutting the adjustment member to stop rotation of the adjustment member. The adjustment member has a clearance portion for avoiding abutment against the engagement member at a given rotational position.Type: GrantFiled: August 28, 2009Date of Patent: March 1, 2011Assignee: Seiko Precision, Inc.Inventors: Hiroshi Takahashi, Chiaki Nemoto
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Patent number: 7798729Abstract: A focal-plane shutter has a first plate having a first opening, a second plate having a second opening, a shutter blade disposed between the first plate and the second plate, for opening and closing the first opening and the second opening, and a thin plate disposed at a side of the first plate facing the shutter blade and extending in such a direction that the shutter blade travel. A distance between an edge of the first opening and a center of the first opening is greater than that between an edge of the thin plate and the center of the first opening.Type: GrantFiled: March 25, 2008Date of Patent: September 21, 2010Assignee: Seiko Precision Inc.Inventors: Hiroshi Takahashi, Yoichi Nakano, Chiaki Nemoto
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Publication number: 20090317072Abstract: A focal plane shutter includes: a shutter substrate having an opening; a blade for opening and closing the opening; a drive member swingably supported for driving the blade; a drive spring for driving the drive member; and an adjustment mechanism for adjusting an urging force of the drive spring. One end of the drive spring is engaged with the drive member. The adjustment mechanism includes: an adjustment member engaging the other end of the drive spring and rotatably supported to adjust the urging force of the drive spring; and an engagement member abutting the adjustment member to stop rotation of the adjustment member. The adjustment member has a clearance portion for avoiding abutment against the engagement member at a given rotational position.Type: ApplicationFiled: August 28, 2009Publication date: December 24, 2009Applicant: SEIKO PRECISION INC.Inventors: Hiroshi TAKAHASHI, Chiaki Nemoto
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Publication number: 20080240708Abstract: A focal-plane shutter has a first plate having a first opening, a second plate having a second opening, a shutter blade disposed between the first plate and the second plate, for opening and closing the first opening and the second opening, and a thin plate disposed at a side of the first plate facing the shutter blade and extending in such a direction that the shutter blade travel. A distance between an edge of the first opening and a center of the first opening is greater than that between an edge of the thin plate and the center of the first opening.Type: ApplicationFiled: March 25, 2008Publication date: October 2, 2008Applicant: SEIKO PRECISION INC.Inventors: Hiroshi Takahashi, Yoichi Nakano, Chiaki Nemoto
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Patent number: 6490416Abstract: A focal plane shutter for a camera has a synchronous contact member that produces less chattering than conventional synchronous contact members. One end of an opening electromagnet and one end of a closing electromagnet are separately connected to the higher-potential side of a power supply for a CPU in the camera, and the other ends of the electromagnets are grounded. An output circuit has an inverter circuit made up of a transistor and two resistors. A driver voltage for energizing the closing electromagnet is applied to the base of the transistor via a first resistor. The collector of the transistor is connected to the higher-potential side of the power supply via a second resistor. The emitter of the transistor is connected to the lower-potential side of the power supply. First and second voltage signals are produced from an output terminal on the side of the collector.Type: GrantFiled: May 14, 2001Date of Patent: December 3, 2002Assignee: Seiko Precision Inc.Inventors: Yoichi Nakano, Akira Ito, Miyoshi Tanikawa, Chiaki Nemoto
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Patent number: 6350069Abstract: To prevent a front end of a slit forming sector of one of an open shutter sector group and a close shutter sector group from colliding with an upper edge portion of a partition opening of a partition plate and preventing leakage of light, a partition plate is provided with a partition plate opening and a projection is formed on the partition plate for preventing sector collision. The projection is formed slightly lower than the level of the upper edge portion of the partition plate opening so that immediately before a slit forming sector of the close shutter sector group comes into contact with the upper edge portion of the partition plate opening, a front end of the slit forming sector rides over the projection and is displaced from the upper edge portion of the partition plate opening.Type: GrantFiled: May 30, 2000Date of Patent: February 26, 2002Assignee: Seiko Precision Inc.Inventors: Osamu Miyauchi, Chiaki Nemoto, Makoto Mikami