Patents by Inventor Masaaki Ono
Masaaki Ono 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: 20060130584Abstract: A structure with superior shock resistance is proposed for a parasol-type acceleration sensor. The acceleration sensor comprises a support portion the lower end of which is fixed to a substrate; a beam portion on which a detection element for applying changes to an output signal in correspondence with strain caused by acceleration acting on the detection element is formed, one end of the beam portion being connected to the top part of the support portion; a suspended weight connected to the other end of the beam portion; and a stopper substrate with a window portion through which, in order to guide an output signal of the detection element via a pad that is formed on the upper end face of the support portion, a conductor lead that is connected to the pad passes. Overswing of the weight is limited by means of the stopper substrate.Type: ApplicationFiled: September 16, 2005Publication date: June 22, 2006Inventors: Masaaki Ono, Nobuko Ono, Hiroshi Ishikawa, Hiroshi Tanaka, Sumio Yamada
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Patent number: 7060378Abstract: A polyester film for magnetic recording media includes a coating layer containing fine particles and organic compounds formed on surface A at one side of the polyester film, and fine surface protrusions formed at a density of 3×106 to 1×108 protrusions/mm2 on surface A. The polyester film satisfies at least one of the following conditions: (a) the mean diameter of the fine surface protrusions is in the range of 5 to 60 nm, and, among the fine surface protrusions, the density of fine surface protrusions with a height of 20 nm or more is 3,000 protrusions/mm2, and (b) the mean diameter of the fine surface protrusions is in the range of 5 to 100 nm, the mean height of the fine surface protrusions is in the range of 5 to 30 nm, and the degree of cohesion of the fine surface protrusion is less than 15%.Type: GrantFiled: February 25, 2003Date of Patent: June 13, 2006Assignee: Toray Industries, Inc.Inventors: Masaaki Ono, Katsuya Okamoto, Kazuyoshi Fukata
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Publication number: 20060110628Abstract: A polyester film for magnetic recording media includes a coating layer containing fine particles and organic compounds formed on surface A at one side of the polyester film, and fine surface protrusions formed at a density of 3×106 to 1×108 protrusions/mm2 on surface A. The polyester film satisfies at least one of the following conditions: (a) the mean diameter of the fine surface protrusions is in the range of 5 to 60 nm, and, among the fine surface protrusions, the density of fine surface protrusions with a height of 20 nm or more is 3,000 protrusions/mm2, and (b) the mean diameter of the fine surface protrusions is in the range of 5 to 100 nm, the mean height of the fine surface protrusions is in the range of 5 to 30 nm, and the degree of cohesion of the fine surface protrusion is less than 15%.Type: ApplicationFiled: January 3, 2006Publication date: May 25, 2006Inventors: Masaaki Ono, Katsuya Okamoto, Kazuyoshi Fukata
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Publication number: 20060086185Abstract: An acceleration sensor with reduced noise that resolves the problem of stress arising from a difference in thermal expansion coefficients is provided.Type: ApplicationFiled: April 14, 2005Publication date: April 27, 2006Inventors: Hiroshi Tanaka, Hiroshi Ishikawa, Kenji Nagata, Masaaki Ono, Tsutomu Miyashita, Sumio Yamada, Nobuko Ono
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Publication number: 20060016261Abstract: An angular velocity sensor is manufactured by simple method and has reduced size and height, and includesa base portion formed by piezoelectric single crystal and having length in the Y-axis direction and thickness in Z-axis direction; and four beams each having length in Y-axis direction vertical to the X- and Z-axis directions that are arranged side by side in X-axis direction and formed by piezoelectric single crystal integrally with the base portion, wherein four beams are grouped in two pairs with one in each pair used as drive beam and the other a counterbalance, the drive beams are provided with drive electrodes adapted to oscillate the beams in the X-axis direction and Y-axis sensing electrodes adapted to detect the rotation angle applied around the Y-axis, and the other beams serving as counterbalances are provided with X-axis sensing electrodes adapted to detect the rotation angle applied around the X-axis.Type: ApplicationFiled: July 20, 2005Publication date: January 26, 2006Inventors: Hiroshi Tanaka, Masanori Yachi, Masaaki Ono, Nobuko Ono
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Publication number: 20060005629Abstract: An inertial sensor such as an acceleration sensor or gyro can have superior impact resistance by regulating displacement of a weight portion in the direction of an upper limit. The sensor includes a sensor portion that has a fixing part, a weight portion the height of which is a predetermined size shorter than that of the fixing part, and a beam portion that links the weight portion and the fixing part; a plate-like first stopper portion that covers the weight portion and is bonded to the fixing part with clearance of a predetermined size from the weight portion; and a flat, plate-like second stopper portion that is connected to the fixing part via a bump of a predetermined height on the side opposite the first stopper portion.Type: ApplicationFiled: March 31, 2005Publication date: January 12, 2006Inventors: Hiroshi Tokunaga, Kenji Nagata, Masaaki Ono, Toshio Hanazawa, Hiroshi Ishikawa
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Publication number: 20050229720Abstract: The present invention provides the stress detection method for force sensor device with multiple axis sensor device and force sensor device employing this method, whose installation angle is arbitrary. The stress detection method includes, first and second force sensors whose detection axes are orthogonal to each other. When the detection axis of first force sensor forms angle ? with direction of detected stress Ax, and the stress component of direction perpendicular to direction of the detected stress Ax is Az, output Apx of the axis direction of first force sensor is found as Apx=?x (Ax×cos ?+Az×sin ?), and output Apz of the axis direction of the second force sensor is found as Apz=?z (Ax×sin ?+Az×cos ?), and, when ?x and ?z are detection sensitivity coefficients of first and second force sensors respectively, the detection sensitivity coefficient ?z of second force sensor is set as ?z=?x tan ?, and the detected stress Ax is found as Ax=(Apx?Apz)/?x(cos ??tan ?×sin ?).Type: ApplicationFiled: March 8, 2005Publication date: October 20, 2005Inventors: Toshio Hanazawa, Masaaki Ono, Tsutomu Miyashita, Hiroshi Tokunaga, Hiroshi Ishikawa
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Patent number: 6936331Abstract: A polyester film comprising a coating layer which comprises organic fine particles and organic compounds on one-side surface of the polyester film, the weight ratio of the organic fine particles to the organic compounds in the coating is 1:0.2 to 1:5.0, the diameters of surface protrusions on the coating surface are 20 to 60 nm, the number of surface protrusions on the surface of the coating layer is 3 million to 100 million per square millimeter, and the surface roughness Ra of the coating surface is 0.5 to 1.9 nm, is suitable as a base film of a recording medium having excellent image quality and excellent durability without shaving an MR head.Type: GrantFiled: May 29, 2003Date of Patent: August 30, 2005Assignee: Toray Industries, Inc.Inventors: Masaaki Ono, Katsuya Okamoto, Kazuyoshi Fukata
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Publication number: 20040043194Abstract: A polyester film comprising a coating layer which comprises organic fine particles and organic compounds on one-side surface of the polyester film, the weight ratio of the organic fine particles to the organic compounds in the coating is 1:0.2 to 1:5.0, the diameters of surface protrusions on the coating surface are 20 to 60 nm, the number of surface protrusions on the surface of the coating layer is 3 million to 100 million per square millimeter, and the surface roughness Ra of the coating surface is 0.5 to 1.9 nm, is suitable as a base film of a recording medium having excellent image quality and excellent durability without shaving an MR head.Type: ApplicationFiled: May 29, 2003Publication date: March 4, 2004Inventors: Masaaki Ono, Katsuya Okamoto, Kazuyoshi Fukata
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Patent number: 6639441Abstract: A clock signal correction circuit which corrects duty cycle distortions of a clock signal in a simple and accurate way. A frequency divider divides the frequency of a given input clock signal by a natural number n, thereby producing a divided clock signal. The phase of this divided clock signal is identified by a phase detector. By adding an appropriate delay to the divided clock signal according to the identified signal phase, a delay unit produces a delayed divided clock signal. A logical operator creates an output clock signal by performing a logical operation on the original divided clock signal and the delayed divided clock signal.Type: GrantFiled: January 16, 2002Date of Patent: October 28, 2003Assignee: Fujitsu Quantum Devices LimitedInventors: Masaaki Ono, Masataka Kazuno, Narito Matsuno
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Publication number: 20030162056Abstract: A polyester film for magnetic recording media includes a coating layer containing fine particles and organic compounds formed on surface A at one side of the polyester film, and fine surface protrusions formed at a density of 3×106 to 1×108 protrusions/mm2 on surface A. The polyester film satisfies at least one of the following conditions: (a) the mean diameter of the fine surface protrusions is in the range of 5 to 60 nm, and, among the fine surface protrusions, the density of fine surface protrusions with a height of 20 nm or more is 3,000 protrusions/mm2, and (b) the mean diameter of the fine surface protrusions is in the range of 5 to 100 nm, the mean height of the fine surface protrusions is in the range of 5 to 30 nm, and the degree of cohesion of the fine surface protrusion is less than 15%.Type: ApplicationFiled: February 25, 2003Publication date: August 28, 2003Inventors: Masaaki Ono, Katsuya Okamoto, Kazuyoshi Fukata
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Patent number: 6513382Abstract: A small-sized, high detection sensitivity and high performance acceleration sensor having directional or non-directional sensitivity is disclosed. The acceleration sensor is provided with a vibrator having uni-directional polarization and a weight connected to the vibrator. The weight is supported at the position different from the center of gravity of the total body of the vibrator and the weight itself. The vibrator is disposed so that its direction of polarization axis is either consistent or inconsistent with an axis of the torsion of the vibrator.Type: GrantFiled: April 16, 2001Date of Patent: February 4, 2003Assignees: Fujitsu Limited, Fujitsu Media Devices Ltd.Inventors: Hiroshi Tanaka, Katsuhiro Sawada, Masanori Yachi, Masaaki Ono, Hiroshi Ishikawa
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Patent number: 6484576Abstract: A tuning-fork vibratory gyro has first and second arms and a base integrally connected to the first and second arms. The gyro includes drive electrodes used to generate tuning-fork vibrations due to a piezoelectric transversal effect, and detection electrodes provided on the first and second arms and used to output a detection voltage due to an angular velocity.Type: GrantFiled: December 22, 2000Date of Patent: November 26, 2002Assignee: Fujitsu LimitedInventors: Masanori Yachi, Yoshio Satoh, Masaaki Ono, Yoshiro Fujiwara, Sumio Yamada, Hiroshi Ishikawa
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Patent number: 6468627Abstract: Disclosed is a base film that has excellent electromagnetic conversion property over the entire length from a roll core portion to a surface portion of the film product and that is suitable for the production of digital videotapes with reduced dropouts. A polyester film for a magnetic recording medium includes at least a polyester layer A and a polyester layer B laminated. A center-line surface average roughness (SRa value) of a layer A-side surface of the film is 2 nm to 4 nm, and a ten-point average surface roughness (SRz value) of the layer A-side surface is 10 nm to 40 nm. The layer B contains a fine particle &agr; whose average particle size is at least 50 nm and less than 250 nm, and a fine particle &bgr; whose average particle size is at least 250 nm and less than 500 nm. The content of the fine particle &agr; in the layer B is 0.1 wt. % to 1.0 wt. %. The content of the fine particle &bgr; in the layer B is 0.01 wt. % to 0.10 wt. %.Type: GrantFiled: December 19, 2000Date of Patent: October 22, 2002Assignee: Toray Industries, Inc.Inventors: Masaaki Ono, Katsuya Okamoto, Toshihiro Tsuzuki, Tsutomu Morimoto
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Publication number: 20020097075Abstract: A clock signal correction circuit which corrects duty cycle distortions of a clock signal in a simple and accurate way. A frequency divider divides the frequency of a given input clock signal by a natural number n, thereby producing a divided clock signal. The phase of this divided clock signal is identified by a phase detector. By adding an appropriate delay to the divided clock signal according to the identified signal phase, a delay unit produces a delayed divided clock signal. A logical operator creates an output clock signal by performing a logical operation on the original divided clock signal and the delayed divided clock signal.Type: ApplicationFiled: January 16, 2002Publication date: July 25, 2002Applicant: Fujitsu Quantum Devices Limited.Inventors: Masaaki Ono, Masataka Kazuno, Narito Matsuno
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Publication number: 20020059830Abstract: A small-sized, high detection sensitivity and high performance acceleration sensor having directional or non-directional sensitivity is disclosed. The acceleration sensor is provided with a vibrator having uni-directional polarization and a weight connected to the vibrator. The weight is supported at the position different from the center of gravity of the total body of the vibrator and the weight itself. The vibrator is disposed so that its direction of polarization axis is either consistent or inconsistent with an axis of the torsion of the vibrator.Type: ApplicationFiled: April 16, 2001Publication date: May 23, 2002Applicant: FUJITSU LIMITEDInventors: Hiroshi Tanaka, Katsuhiro Sawada, Masanori Yachi, Masaaki Ono, Hiroshi Ishikawa
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Publication number: 20010006743Abstract: Disclosed is a base film that has excellent electromagnetic conversion property over the entire length from a roll core portion to a surface portion of the film product and that is suitable for the production of digital videotapes with reduced dropouts. A polyester film for a magnetic recording medium includes at least a polyester layer A and a polyester layer B laminated. A center-line surface average roughness (SRa value) of a layer A-side surface of the film is 2 nm to 4 nm, and a ten-point average surface roughness (SRz value) of the layer A-side surface is 10 nm to 40 nm. The layer B contains a fine particle &agr; whose average particle size is at least 50 nm and less than 250 nm, and a fine particle &bgr; whose average particle size is at least 250 nm and less than 500 nm. The content of the fine particle &agr; in the layer B is 0.1 wt. % to 1.0 wt. %. The content of the fine particle &agr; in the layer B is 0.01 wt. % to 0.10 wt. %.Type: ApplicationFiled: December 19, 2000Publication date: July 5, 2001Inventors: Masaaki Ono, Katsuya Okamoto, Toshihiro Tsuzuki, Tsutomu Morimoto
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Patent number: 6253613Abstract: A tuning-fork vibratory gyro has first and second arms and a base integrally connected to the first and second arms. The gyro includes drive electrodes used to generate tuning-fork vibrations due to a piezoelectric transversal effect, and detection electrodes provided on the first and second arms and used to output a detection voltage due to an angular velocity.Type: GrantFiled: February 20, 1997Date of Patent: July 3, 2001Assignee: Fujitsu LimitedInventors: Masanori Yachi, Yoshio Satoh, Masaaki Ono, Yoshiro Fujiwara, Sumio Yamada, Hiroshi Ishikawa
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Publication number: 20010000853Abstract: A tuning-fork vibratory gyro has first and second arms and a base integrally connected to the first and second arms. The gyro includes drive electrodes used to generate tuning-fork vibrations due to a piezoelectric transversal effect, and detection electrodes provided on the first and second arms and used to output a detection voltage due to an angular velocity.Type: ApplicationFiled: December 22, 2000Publication date: May 10, 2001Applicant: FUJITSU LIMITEDInventors: Masanori Yachi, Yoshio Satoh, Masaaki Ono, Yoshiro Fujiwara, Sumio Yamada, Hiroshi Ishikawa
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Patent number: 6117483Abstract: A method for storing a polyester film for a magnetic recording medium, characterized in that a polyester film for a magnetic recording medium with a surface roughness Ra of 6 nm or less on the surface A on one side is stored substantially in a storing atmosphere having a storing temperature kept in a range from 10.degree. C. to 35.degree. C. The polyester film stored according to this storing method is used as a base film for producing magnetic tapes.Type: GrantFiled: September 17, 1999Date of Patent: September 12, 2000Assignee: Toray Industries, Inc.Inventors: Masaaki Ono, Katsuya Okamoto, Tadashi Harada