Patents by Inventor Masato Yokoyama
Masato Yokoyama 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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Patent number: 11918717Abstract: A blood purification device includes a device body and a cassette. The cassette includes: a casing that accommodates a removal water receptacle; and pump tube. The device body includes fingers, a driving unit, and a housing. The cassette can be attached to and removed from the housing of the device body so that the pump tubes are positioned between the plurality of fingers and the outer surfaces of the casing.Type: GrantFiled: August 27, 2019Date of Patent: March 5, 2024Assignee: NIKKISO CO., LTD.Inventors: Takayoshi Yokoyama, Masato Fujiwara, Hiroshi Nimura
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Patent number: 10466027Abstract: A system for marker placement includes a plurality of puzzle blocks connectable by a connection mechanism. The plurality of puzzle blocks include a plurality of markers positioned in a predetermined configuration. The puzzle blocks are connected together by the connection mechanism to surround a sensor for calibration of the sensor with the plurality of markers. The puzzle blocks include one or more sizes and have a quantity based on a calibration parameter of the sensor.Type: GrantFiled: June 21, 2017Date of Patent: November 5, 2019Assignee: FUJITSU TEN CORP. OF AMERICAInventors: Masato Yokoyama, Hiroshi Iwabuchi
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Publication number: 20180372467Abstract: A system for marker placement includes a plurality of puzzle blocks connectable by a connection mechanism. The plurality of puzzle blocks include a plurality of markers positioned in a predetermined configuration. The puzzle blocks are connected together by the connection mechanism to surround a sensor for calibration of the sensor with the plurality of markers. The puzzle blocks include one or more sizes and have a quantity based on a calibration parameter of the sensor.Type: ApplicationFiled: June 21, 2017Publication date: December 27, 2018Applicant: FUJITSU TEN CORP. OF AMERICAInventors: Masato YOKOYAMA, Hiroshi IWABUCHI
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Patent number: 10080593Abstract: A rod template for determining a curvature and a length of a spinal rod used for joining vertebrae in a spine fusion surgery in advance includes a core, a transparent outer tube, and a transparent filler. The core is made of metal and includes a scale on a surface thereof. The outer tube is made of silicone rubber and covers the core. The filler is made of liquid silicone rubber and inserted in a gap between the outer tube and the core to fill the gap.Type: GrantFiled: February 16, 2017Date of Patent: September 25, 2018Assignee: NISHIJIMA MEDICAL CO., LTD.Inventors: Shigehiko Higaki, Tomohiro Ohtake, Masato Yokoyama
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Publication number: 20170238976Abstract: A rod template for determining a curvature and a length of a spinal rod used for joining vertebrae in a spine fusion surgery in advance includes a core, a transparent outer tube, and a transparent filler. The core is made of metal and includes a scale on a surface thereof. The outer tube is made of silicone rubber and covers the core. The filler is made of liquid silicone rubber and inserted in a gap between the outer tube and the core to fill the gap.Type: ApplicationFiled: February 16, 2017Publication date: August 24, 2017Inventors: Shigehiko HIGAKI, Tomohiro OHTAKE, Masato YOKOYAMA
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Patent number: 7800335Abstract: A method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing oscillation of the motor are disclosed. A motor drive controller includes a drive motor, a detector, and a motor drive controller. The drive motor drives a moving body around a target moving speed. The detector detects a current moving speed of the moving body and output it as a detector pulse signal. The controller calculates a difference between the current moving speed and the target moving speed, calculates a control value based on the difference, calculates a pulse rate of a drive pulse signal based on the control value after having controlled the control value to be within a predetermined value, and feedback controls the drive motor based on the pulse rate.Type: GrantFiled: April 25, 2007Date of Patent: September 21, 2010Assignee: Ricoh Company, Ltd.Inventors: Toshiyuki Andoh, Tadashi Shinohara, Yuuji Matsuda, Kazuhiko Kobayashi, Nobuto Yokokawa, Masato Yokoyama, Yohhei Miura, Toshiyuki Takahashi, Jun Hosokawa
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Patent number: 7712989Abstract: An ink jet recording apparatus performs a print operation by controlling an ink jet recording head to eject ink drops there from against front and back surfaces of a recording sheet at a print position. The apparatus includes a transporting mechanism for transporting a portion of the recording sheet to a location outside of the apparatus after a completion of the print operation on the front surface of the recording sheet and just before printing of the back surface of the recording sheet.Type: GrantFiled: December 12, 2005Date of Patent: May 11, 2010Assignee: Ricoh Company, Ltd.Inventors: Motokazu Yasui, Tsumori Sato, Masanori Horike, Masato Yokoyama, Masumi Sato
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Patent number: 7535594Abstract: A scanning lens for an optical scanner includes a specific adjusting axis and a curved surface. The specific adjusting axis makes a rotating center of the scanning lens and center of the curved surface. The scanning lens is disposed on a holding member having a receiving surface, so that the curved surface is in contact with the receiving surface. A position of the scanning lens is adjusted by a rotating mechanism that rotates the scanning lens.Type: GrantFiled: February 25, 2004Date of Patent: May 19, 2009Assignee: Ricoh Company, LimitedInventors: Hiroshi Yoshizawa, Masato Yokoyama
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Patent number: 7509074Abstract: An image forming apparatus including an image carrying member, a transfer member, support rollers, a detecting mechanism, and a controller. The image carrying member supported by the support rollers, forms a toner image on its surface facing a surface of the transfer member, which transfers the toner image to a recording medium. The detecting mechanism includes a detection roller, a roller shaft, a moving member, and a sensor, and detects a speed of the image carrying member. The detection roller includes one support roller selected from the support rollers, and is provided with the roller shaft. The moving member is directly fixed to the roller shaft and rotates with the detection roller. The sensor detects a moving speed of the detection roller with the moving member. The controller controls a traveling speed of the image carrying member to a target speed based on a detection result of the sensor.Type: GrantFiled: June 12, 2007Date of Patent: March 24, 2009Assignee: Ricoh Company, Ltd.Inventors: Masato Yokoyama, Nobuto Yokokawa, Toshiyuki Ando, Kazuhiko Kobayashi, Tadashi Shinohara, Yuuji Matsuda, Jun Hosokawa, Yohhei Miura, Toshiyuki Takahashi, Hiromichi Matsuda
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Patent number: 7454150Abstract: An image forming apparatus includes a belt stretched across rollers and a resist rotary member that feeds out a recording medium on the belt. A correlation between a velocity of the belt and the resist rotary member is obtained. A target velocity of the belt or the resist rotary member, at which a difference between the velocity when the recording medium is in contact with both the belt and the resist rotary member and the velocity when the recording medium is not in contact with at least either the belt or the resist rotary member is minimum, is determined based on the correlation.Type: GrantFiled: January 9, 2006Date of Patent: November 18, 2008Assignee: Ricoh Company, Ltd.Inventors: Hiromichi Matsuda, Toshiyuki Andoh, Masato Yokoyama, Kazuhiko Kobayashi, Yuji Matsuda, Yohei Miura, Hiroshi Okamura, Nobuto Yokokawa, Ryoji Imai
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Patent number: 7386262Abstract: A belt driving control apparatus, the belt driving control apparatus having an endless belt, a driving roller driving the endless belt, a driving motor driving the driving roller, at least one idler roller being dependent on the endless belt, and an encoder attached to one idler roller. The belt driving control apparatus includes a structure where a control target value of the driving motor is set so that an effective speed of the endless belt is constant and the driving motor is drive-controlled so that the control target value is satisfied.Type: GrantFiled: January 20, 2006Date of Patent: June 10, 2008Assignee: Ricoh Company, Ltd.Inventors: Hiroshi Okamura, Yuji Matsuda, Hiromichi Matsuda, Toshiyuki Andoh, Nobuto Yokokawa, Ryoji Imai, Masato Yokoyama, Kazuhiko Kobayashi, Yohei Miura
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Patent number: 7376375Abstract: A mark detecting unit detects a mark that is a reference position of an endless belt. An angular-displacement-error detecting unit detects an angular displacement error of an encoder caused by thickness fluctuation of the endless belt. A first calculating unit calculates a phase and a maximum amplitude to the mark. A second calculating unit calculates correction data according to a distance from the mark on the endless belt. A belt-drive control device controls a belt driving unit by adding the correction data to a preset control target value to stabilize speed fluctuation of the endless belt due to the thickness fluctuation.Type: GrantFiled: January 19, 2006Date of Patent: May 20, 2008Assignee: Ricoh Company, LimitedInventors: Kazuhiko Kobayashi, Hiromichi Matsuda, Toshiyuki Andoh, Nobuto Yokokawa, Ryoji Imai, Yuji Matsuda, Hiroshi Okamura, Masato Yokoyama, Yohei Miura
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Patent number: 7344326Abstract: An ink jet recording apparatus performs a print operation by controlling an ink jet recording head to eject ink drops there from against front and back surfaces of a recording sheet at a print position. The apparatus includes a transporting mechanism for transporting a portion of the recording sheet to a location outside of the apparatus after a completion of the print operation on the front surface of the recording sheet and just before printing of the back surface of the recording sheet.Type: GrantFiled: February 27, 2004Date of Patent: March 18, 2008Assignee: Ricoh Company, Ltd.Inventors: Motokazu Yasui, Tsumori Sato, Masanori Horike, Masato Yokoyama, Masumi Sato
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Patent number: 7330009Abstract: A method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing oscillation of the motor rotational speed are disclosed. A motor drive controller includes a drive motor, a detector, and a motor drive controller. The drive motor drives a moving body around a target speed. The detector detects a current moving speed of the moving body and outputs it as a detector pulse signal. The controller calculates a difference between the current moving speed and the target moving speed, calculates a control value based on the difference, calculates a pulse rate of a drive pulse signal based on the control value after having controlled the control value to be within a predetermined value, and controls the drive motor based on the pulse rate.Type: GrantFiled: July 19, 2004Date of Patent: February 12, 2008Assignee: Ricoh Co., Ltd.Inventors: Toshiyuki Andoh, Tadashi Shinohara, Yuuji Matsuda, Kazuhiko Kobayashi, Nobuto Yokokawa, Masato Yokoyama, Yohhei Miura, Toshiyuki Takahashi, Jun Hosokawa
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Patent number: 7319475Abstract: An image forming apparatus includes an image bearing member having a photosensitive surface and an optical writing apparatus generating a laser beam modulated according to image data. The optical writing apparatus includes a housing, an optical deflector, an f-theta lens and a separator. The optical deflector is configured to rotate to deflect the laser beam. The f-theta lens is configured to correct the laser beam deflected by the optical deflector and to transmit a corrected laser beam towards the image bearing member. The separator is configured to separate an inside space of the housing into at least two sections including a first section in which the optical deflector is mounted and a second section in which the f-theta lens is mounted. The separator includes a heat resistant transparent plate disposed at a position of crossing passage of the laser beam between the optical deflector and the f-theta lens.Type: GrantFiled: June 1, 2004Date of Patent: January 15, 2008Assignee: Ricoh Company, Ltd.Inventors: Yasumasa Tomita, Hiroshi Yoshizawa, Tetsuya Kimura, Masato Yokoyama, Keiji Okamoto, Keiichi Serizawa
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Patent number: 7307648Abstract: A passbook printing apparatus comprises a movable tension roller correcting slack of an intermediate transfer film resulting from a different in a feed speed between a film drive roller and a film wind-up reel, and a control device operating the film wind-up reel to apply a predetermined tension to the intermediate transfer material in a state of stopping the film drive roller, thereby moving and fixing the tension roller to a predetermined position, and thereafter, feeding the intermediate transfer film by a predetermined distance by the film drive roller to position it to the transfer position.Type: GrantFiled: May 24, 2005Date of Patent: December 11, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Masato Yokoyama, Toshiaki Aoyagi
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Publication number: 20070231022Abstract: An image forming apparatus including an image carrying member, a transfer member, support rollers, a detecting mechanism, and a controller. The image carrying member forms a toner image on its surface facing a surface of the transfer member, supported by the support rollers, which transfers the toner image to a recording medium. The detecting mechanism includes a detection roller, a roller shaft, a moving member, and a sensor, and detects a speed of the transfer member. The detection roller includes one support roller selected from the support rollers, and is provided with the roller shaft. The moving member is directly fixed to the roller shaft and rotates with the detection roller. The sensor detects a moving speed of the detection roller with the moving member. The controller controls a traveling speed of the transfer member to a target speed based on a detection result of the sensor.Type: ApplicationFiled: June 12, 2007Publication date: October 4, 2007Inventors: Masato Yokoyama, Nobuto Yokokawa, Toshiyuki Ando, Kazuhiko Kobayashi, Tadashi Shinohara, Yuuji Matsuda, Jun Hosokawa, Yohhei Miura, Toshiyuki Takahashi, Hiromichi Matsuda
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Publication number: 20070189815Abstract: A method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing oscillation of the motor are disclosed. A motor drive controller includes a drive motor, a detector, and a motor drive controller. The drive motor drives a moving body around a target moving speed. The detector detects a current moving speed of the moving body and output it as a detector pulse signal. The controller calculates a difference between the current moving speed and the target moving speed, calculates a control value based on the difference, calculates a pulse rate of a drive pulse signal based on the control value after having controlled the control value to be within a predetermined value, and feedback controls the drive motor based on the pulse rate.Type: ApplicationFiled: April 25, 2007Publication date: August 16, 2007Inventors: Toshiyuki Andoh, Tadashi Shinohara, Yuuji Matsuda, Kazuhiko Kobayashi, Nobuto Yokokawa, Masato Yokoyama, Yohhei Miura, Toshiyuki Takahashi, Jun Hosokawa
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Patent number: 7257339Abstract: An image forming apparatus including an image carrying member, a transfer member, support rollers, a detecting mechanism, and a controller. The image carrying member forms a toner image on its surface facing a surface of the transfer member, supported by the support rollers, which transfers the toner image to a recording medium. The detecting mechanism includes a detection roller, a roller shaft, a moving member, and a sensor, and detects a speed of the transfer member. The detection roller includes one support roller selected from the support rollers, and is provided with the roller shaft. The moving member is directly fixed to the roller shaft and rotates with the detection roller. The sensor detects a moving speed of the detection roller with the moving member. The controller controls a traveling speed of the transfer member to a target speed based on a detection result of the sensor.Type: GrantFiled: July 19, 2004Date of Patent: August 14, 2007Assignee: Ricoh Company, Ltd.Inventors: Masato Yokoyama, Nobuto Yokokawa, Toshiyuki Ando, Kazuhiko Kobayashi, Tadashi Shinohara, Yuuji Matsuda, Jun Hosokawa, Yohhei Miura, Toshiyuki Takahashi, Hiromichi Matsuda
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Patent number: 7251444Abstract: To compensate for the variation in the output signal from an encoder due to the variation in the thickness of an endless belt, an apparatus includes: a detector that detects a reference position on the endless belt; a correction-value calculating unit that calculates a correction value for each position on the endless belt based on the thickness; and a target-value calculating unit that adjusts a target value for controlling a driving motor based on the correction value corresponding to a distance from the reference position to the current position.Type: GrantFiled: August 15, 2005Date of Patent: July 31, 2007Assignee: Ricoh Company, Ltd.Inventors: Yuji Matsuda, Hiromichi Matsuda, Toshiyuki Andoh, Nobuto Yokokawa, Ryoji Imai, Hiroshi Okamura, Masato Yokoyama, Kazuhiko Kobayashi, Yohei Miura