Patents by Inventor Tadashi Akita
Tadashi Akita 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: 8295949Abstract: There is provided a control system comprising: a master device that includes: a first transmission section that transmits, to a plurality of slave devices connected thereto through a network, a control command for the slave devices to control a device to be controlled and a flag that have two or more values; and a second transmission section that transmits, to the plurality of slave devices, a control start command for the slave devices to simultaneously start performing control based on the control command transmitted by the first transmission section, and a slave device that includes: a reception section that receives the control command and flag transmitted from the master device; a control command storage section that stores the control command received by the reception section in a storage section in the case where the flag received by the reception section has a specified value; and a first control start section that receives the control start command transmitted from the master device and starts perforType: GrantFiled: April 23, 2010Date of Patent: October 23, 2012Assignee: Fujitsu LimitedInventor: Tadashi Akita
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Patent number: 7966888Abstract: A screw fastener includes a first screwdriver including a first bit configured to fasten a first screw by engaging with a recess of the first screw, and a first motor configured to rotate the first bit, a second screwdriver including a second bit configured to fasten a first screw by engaging with a recess of the second screw, and a second motor configured to rotate the second bit, an elevator unit configured to simultaneously ascend and descend both the first screwdriver and the second screwdriver, and a controller configured to control the first motor and the second motor so that seating of the first screw can start after torquing-up of the second screw starts.Type: GrantFiled: May 10, 2010Date of Patent: June 28, 2011Assignee: Fujitsu LimitedInventor: Tadashi Akita
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Publication number: 20100218647Abstract: A screw fastener includes a first screwdriver including a first bit configured to fasten a first screw by engaging with a recess of the first screw, and a first motor configured to rotate the first bit, a second screwdriver including a second bit configured to fasten a first screw by engaging with a recess of the second screw, and a second motor configured to rotate the second bit, an elevator unit configured to simultaneously ascend and descend both the first screwdriver and the second screwdriver, and a controller configured to control the first motor and the second motor so that seating of the first screw can start after torquing-up of the second screw starts.Type: ApplicationFiled: May 10, 2010Publication date: September 2, 2010Applicant: FUJITSU LIMITEDInventor: Tadashi Akita
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Publication number: 20100211190Abstract: There is provided a control system comprising: a master device that includes: a first transmission section that transmits, to a plurality of slave devices connected thereto through a network, a control command for the slave devices to control a device to be controlled and a flag that have two or more values; and a second transmission section that transmits, to the plurality of slave devices, a control start command for the slave devices to simultaneously start performing control based on the control command transmitted by the first transmission section, and a slave device that includes: a reception section that receives the control command and flag transmitted from the master device; a control command storage section that stores the control command received by the reception section in a storage section in the case where the flag received by the reception section has a specified value; and a first control start section that receives the control start command transmitted from the master device and starts perforType: ApplicationFiled: April 23, 2010Publication date: August 19, 2010Applicant: FUJITSU LIMITEDInventor: Tadashi Akita
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Patent number: 7759893Abstract: The motor control apparatus includes a memory that stores a correction data group for suppressing a fluctuation of an output of a motor, and a calculating unit that generates, by using a correction value calculated on the basis of a first output command value input thereto and the correction data group, a second output command value for controlling the output of the motor, the correction value being in accordance with operation position information of the motor. The memory stores plural correction data groups corresponding to predetermined output command values for different torque levels. The calculating unit calculates the correction value in accordance with the first output command value and the operation position information of the motor by interpolation processing using correction data included in at least two correction data groups among the plural correction data groups. The apparatus suppresses the output fluctuation of the motor.Type: GrantFiled: August 29, 2008Date of Patent: July 20, 2010Assignee: Fujitsu LimitedInventor: Tadashi Akita
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Patent number: 7665366Abstract: The screw tightening control system includes plural screw tightening apparatuses, and a control apparatus that sets a synchronization point after completion of changing tightening torques of the plural screw tightening apparatuses in a current step, and starts changing of the tightening torques of the plural screw tightening apparatuses in a next step, step by step from the synchronization point. The control apparatus causes a timing to start the changing of the tightening torque of at least one of the plural screw tightening apparatuses from the synchronization point to differ from a timing to start the changing of the tightening torque of at least another one of the plural screw tightening apparatuses. The system controls the plural screw tightening apparatuses while synchronizing them so as to avoid the inconveniences in a conventional art by a simple method.Type: GrantFiled: August 27, 2008Date of Patent: February 23, 2010Assignee: Fujitsu LimitedInventor: Tadashi Akita
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Patent number: 7586284Abstract: A synchronization control system includes plural controlling object apparatuses connected through first and second wired OR lines. Each controlling object apparatus includes a function of switching an output to the first wired OR line from a first state to a second state in an odd numberth synchronization waiting state and switching an output to the second wired OR line from the first state to the second state in an even numberth synchronization waiting state. A control apparatus determines an odd numberth synchronization in response to changing of the first wired OR line from the first state to the second state when all the controlling object apparatuses enter the odd numberth synchronization waiting state, and determines an even numberth synchronization in response to changing of the second wired OR line from the first state to the second state when all the controlling object apparatuses enter the even numberth synchronization waiting state.Type: GrantFiled: August 29, 2008Date of Patent: September 8, 2009Assignee: Fujitsu LimitedInventor: Tadashi Akita
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Publication number: 20090005910Abstract: A synchronization control system includes plural controlling object apparatuses connected through first and second wired OR lines. Each controlling object apparatus includes a function of switching an output to the first wired OR line from a first state to a second state in an odd numberth synchronization waiting state and switching an output to the second wired OR line from the first state to the second state in an even numberth synchronization waiting state. A control apparatus determines an odd numberth synchronization in response to changing of the first wired OR line from the first state to the second state when all the controlling object apparatuses enter the odd numberth synchronization waiting state, and determines an even numberth synchronization in response to changing of the second wired OR line from the first state to the second state when all the controlling object apparatuses enter the even numberth synchronization waiting state.Type: ApplicationFiled: August 29, 2008Publication date: January 1, 2009Applicant: FUJITSU LIMITEDInventor: Tadashi Akita
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Publication number: 20080314206Abstract: The screw tightening control system includes plural screw tightening apparatuses, and a control apparatus that sets a synchronization point after completion of changing tightening torques of the plural screw tightening apparatuses in a current step, and starts changing of the tightening torques of the plural screw tightening apparatuses in a next step, step by step from the synchronization point. The control apparatus causes a timing to start the changing of the tightening torque of at least one of the plural screw tightening apparatuses from the synchronization point to differ from a timing to start the changing of the tightening torque of at least another one of the plural screw tightening apparatuses. The system controls the plural screw tightening apparatuses while synchronizing them so as to avoid the inconveniences in a conventional art by a simple method.Type: ApplicationFiled: August 27, 2008Publication date: December 25, 2008Applicant: FUJITSU LIMITEDInventor: Tadashi AKITA
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Publication number: 20080315810Abstract: The motor control apparatus includes a memory that stores a correction data group for suppressing a fluctuation of an output of a motor, and a calculating unit that generates, by using a correction value calculated on the basis of a first output command value input thereto and the correction data group, a second output command value for controlling the output of the motor, the correction value being in accordance with operation position information of the motor. The memory stores plural correction data groups corresponding to predetermined output command values for different torque levels. The calculating unit calculates the correction value in accordance with the first output command value and the operation position information of the motor by interpolation processing using correction data included in at least two correction data groups among the plural correction data groups. The apparatus suppresses the output fluctuation of the motor.Type: ApplicationFiled: August 29, 2008Publication date: December 25, 2008Applicant: FUJITSU LIMITEDInventor: Tadashi Akita
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Patent number: 5837389Abstract: A magnetic recording medium has a magnetic layer of a Co alloy with a Pt content of about 3 to about 6 atomic % and is given a higher coercive force. The medium includes a ground layer formed on a nonmagnetic base plate and having a composition comprising, as expressed in atomic %, 1 to 6% of Ta, 1 to 6% of Cu and the balance substantially Cr, whereby an increased crystal lattice constant is afforded to the Cr.Type: GrantFiled: April 25, 1997Date of Patent: November 17, 1998Assignee: StorMedia IncorporatedInventors: Yoshinobu Okumura, Tadashi Akita
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Patent number: 5789090Abstract: A metallic thin-film magnetic recording medium which is enhanced in coercive force, diminished in nonlinear waveform interference through controlled magnetic anisotropy and adapted to a higher recording density. A seed layer of a crystalline Cr--Ni alloy is formed between the substrate of the medium and a Cr ground layer, whereby the crystal orientation of a magnetic layer is substantially (100) orientation. The crystalline alloy includes an alloy consisting essentially of 36 to 46 atomic % of Ni and the balance substantially Cr, or an alloy consisting essentially of 36 to 46 atomic % of Ni, 0.5 to 3 atomic % of W or Mo or combination thereof and the balance substantially Cr.Type: GrantFiled: August 6, 1996Date of Patent: August 4, 1998Assignee: StorMedia, Inc.Inventors: Yoshinobu Okumura, Masahiko Yasui, Tadashi Akita, Makoto Maeda
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Patent number: 4912123Abstract: Disclosed is a novel imidazole compound represented by the following formula: ##STR1## wherein A.sub.1 stands for a thien-3-yl or 4-chlorophenyl group and A.sub.2 stands for a 2,4-dichlorophenyl, 2-chlorothien-3-yl or 2-chloro-5-bromothien-3-yl group, with the proviso that at least one of A.sub.1 and A.sub.2 stands for a thien-3-yl or halogen-substituted thien-3-yl group. This compound is effective as a therapeutic antifungal agent or mildewproofing agent.Type: GrantFiled: October 27, 1988Date of Patent: March 27, 1990Assignee: Shikoku Chemicals CorporationInventors: Takayuki Fujita, Yoshiya Iwasaki, Hiroko Yabe, Tadashi Akita
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Patent number: 4862751Abstract: A force-detecting apparatus comprising an elastic member deformable symmetrically with respect to the center, a first displacement-detecitng means for detecting the displacements of the elastic member at the positions symmetric with respect to the center in the same direction, and a second displacement-detecting means for detecting the displacements of the elastic member at the positions symmetric with respect to the center in the opposite directions.Type: GrantFiled: May 10, 1988Date of Patent: September 5, 1989Assignee: Fujitsu LimitedInventors: Kazuo Asakawa, Nobuhiko Onda, Tadashi Akita, Toru Kamada
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Patent number: 4791588Abstract: A movable apparatus drive system comprises a driving device for the movable apparatus, a first output device for detecting environmental information around the movable apparatus and for outputting a corresponding signal in response to the environmental information data, a second output device for outputting a command signal to drive the driving device so as to move the movable apparatus to a target position, based on target position data of the movable apparatus to be moved and current position data of the movable apparatus; and a supply device for supplying a composite signal constituted by the environmental information data and the command signal.Type: GrantFiled: July 24, 1987Date of Patent: December 13, 1988Assignee: Fujitsu LimitedInventors: Nobuhiko Onda, Kazuo Asakawa, Tadashi Akita, Hitoshi Komoriya, Toru Kamada
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Patent number: 4762006Abstract: A force-detecting apparatus includes an elastic member deformable symmetrically with respect to the center. First displacement-detecting means, detect displacements of the elastic member, at positions symmetric with respect to the center, in the same direction with respect to an axis passing through the center of the elastic member, and second displacement-detecting means detect displacements of the elastic member, at the positions symmetric with respect to the center, in opposite directions with respect to an axis passing through the center of the elastic member.Type: GrantFiled: September 24, 1985Date of Patent: August 9, 1988Assignee: Fujitsu LimitedInventors: Kazuo Asakawa, Nobuhiko Onda, Tadashi Akita, Toru Kamada
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Patent number: 4720551Abstract: Disclosed are compounds represented by the following general formula and its hydrochloride salts: ##STR1## wherein A.sub.1 stands for a phenyl group, a halophenyl group, a thienyl group or a halothienyl group, and A.sub.2 stands for a phenyl group or a halophenyl group.These compounds can be obtained by reacting an imidazole compound of the following formula: ##STR2## with a benzaldehyde compound of the formula A.sub.2 -CHO. These compounds are valuable as fungicidal agents.Type: GrantFiled: September 12, 1986Date of Patent: January 19, 1988Assignee: Shikoku Chemicals CorporationInventors: Takayuki Fujita, Hiroko Yabe, Tadashi Akita
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Patent number: 4577032Abstract: This invention relates to 1-benzoylhalomethyl-imidazole compounds and processes for their production.The 1-benzoylhalomethylimidazole compounds are represented by the following formula: ##STR1## wherein R is a hydrogen atom or a lower alkyl group, X is a halogen atom and X' is a hydrogen atom or a halogen atom. They are very useful as antifungal agents, insect attractants and the like.Type: GrantFiled: June 15, 1984Date of Patent: March 18, 1986Inventors: Takayuki Fujita, Yoshikazu Kitazawa, Tadashi Akita, Isamu Tani