Patents by Inventor Mitsugu Ogiura
Mitsugu Ogiura 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: 6922879Abstract: An acceleration sensor includes a piezoelectric element and support frames for supporting the ends of the piezoelectric element in the longitudinal direction. The piezoelectric element is formed by stacking an even number of piezoelectric layers greater than or equal to four layers. Electrodes are provided in between the layers and on the front and back faces of the piezoelectric element. The interlayer electrodes including a segmented electrode and lead electrodes are alternately stacked with the piezoelectric layers therebetween. The interlayer electrode in the middle in the thickness direction is a segmented electrode. The piezoelectric layers are polarized in the thickness direction so that charge having the same polarity is extracted from the electrodes when the acceleration is applied. Also, the center portion and both end portions of each piezoelectric layer are polarized in opposite directions.Type: GrantFiled: October 27, 2003Date of Patent: August 2, 2005Assignee: Murata Manufacturing Co., Ltd.Inventor: Mitsugu Ogiura
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Patent number: 6744181Abstract: A piezoelectric type acceleration sensor which is small in size and has a high charge sensitivity and large static capacitance includes a piezoelectric element having a laminate of more than three piezoelectric layers. Electrodes are provided between the piezoelectric layers and the top and bottom surfaces of the laminate. The piezoelectric element is supported at opposed ends. Adjacent ones of the piezoelectric layers are polarized so that charge having the same polarity is accumulated at the electrode interposed the adjacent ones.Type: GrantFiled: August 12, 1997Date of Patent: June 1, 2004Assignee: Murata Manufacturing Co., LtdInventors: Mitsugu Ogiura, Jun Tabota
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Publication number: 20040085000Abstract: An acceleration sensor includes a piezoelectric element and support frames for supporting the ends of the piezoelectric element in the longitudinal direction. The piezoelectric element is formed by stacking an even number of piezoelectric layers greater than or equal to four layers. Electrodes are provided in between the layers and on the front and back faces of the piezoelectric element. The interlayer electrodes including a segmented electrode and lead electrodes are alternately stacked with the piezoelectric layers therebetween. The interlayer electrode in the middle in the thickness direction is a segmented electrode. The piezoelectric layers are polarized in the thickness direction so that charge having the same polarity is extracted from the electrodes when the acceleration is applied. Also, the center portion and both end portions of each piezoelectric layer are polarized in opposite directions.Type: ApplicationFiled: October 27, 2003Publication date: May 6, 2004Applicant: Murata Manufacturing Co., Ltd.Inventor: Mitsugu Ogiura
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Patent number: 6710519Abstract: An acceleration sensor includes a piezoelectric element and support frames for supporting the ends of the piezoelectric element in the longitudinal direction. The piezoelectric element is formed by stacking an even number of piezoelectric layers greater than or equal to four layers. Electrodes are provided in between the layers and on the front and back faces of the piezoelectric element. The interlayer electrodes including a segmented electrode and lead electrodes are alternately stacked with the piezoelectric layers therebetween. The interlayer electrode in the middle in the thickness direction is a segmented electrode. The piezoelectric layers are polarized in the thickness direction so that charge having the same polarity is extracted from the electrodes when the acceleration is applied. Also, the center portion and both end portions of each piezoelectric layer are polarized in opposite directions.Type: GrantFiled: January 10, 2002Date of Patent: March 23, 2004Assignee: Murata Manufacturing Co., Ltd.Inventor: Mitsugu Ogiura
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Patent number: 6619124Abstract: An acceleration sensor includes a piezoelectric element and support frames for supporting the ends of the piezoelectric element in the longitudinal direction. The piezoelectric element is formed by stacking an even number of piezoelectric layers greater than or equal to six layers. Electrodes are provided in between the layers and on the front and back faces of the piezoelectric element. The interlayer electrodes including segmented electrodes and lead electrodes are alternately stacked with the piezoelectric layers therebetween. The interlayer electrode in the middle in the thickness direction is a lead electrode. The piezoelectric layers are polarized in the thickness direction so that charge having the same polarity is extracted from the electrodes when an acceleration is applied. Also, the center portion and both end portions of each piezoelectric layer are polarized in opposite directions.Type: GrantFiled: January 10, 2002Date of Patent: September 16, 2003Assignee: Murata Manufacturing Co., Ltd.Inventor: Mitsugu Ogiura
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Publication number: 20020139189Abstract: An acceleration sensor includes a piezoelectric element and support frames for supporting the ends of the piezoelectric element in the longitudinal direction. The piezoelectric element is formed by stacking an even number of piezoelectric layers greater than or equal to six layers. Electrodes are provided in between the layers and on the front and back faces of the piezoelectric element. The interlayer electrodes including segmented electrodes and lead electrodes are alternately stacked with the piezoelectric layers therebetween. The interlayer electrode in the middle in the thickness direction is a lead electrode. The piezoelectric layers are polarized in the thickness direction so that charge having the same polarity is extracted from the electrodes when an acceleration is applied. Also, the center portion and both end portions of each piezoelectric layer are polarized in opposite directions.Type: ApplicationFiled: January 10, 2002Publication date: October 3, 2002Applicant: Murata Manufacturing Co., Ltd.Inventor: Mitsugu Ogiura
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Publication number: 20020139188Abstract: An acceleration sensor includes a piezoelectric element and support frames for supporting the ends of the piezoelectric element in the longitudinal direction. The piezoelectric element is formed by stacking an even number of piezoelectric layers greater than or equal to four layers. Electrodes are provided in between the layers and on the front and back faces of the piezoelectric element. The interlayer electrodes including a segmented electrode and lead electrodes are alternately stacked with the piezoelectric layers therebetween. The interlayer electrode in the middle in the thickness direction is a segmented electrode. The piezoelectric layers are polarized in the thickness direction so that charge having the same polarity is extracted from the electrodes when the acceleration is applied. Also, the center portion and both end portions of each piezoelectric layer are polarized in opposite directions.Type: ApplicationFiled: January 10, 2002Publication date: October 3, 2002Applicant: Murata Manufacturing Co., Ltd.Inventor: Mitsugu Ogiura
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Patent number: 6429670Abstract: A piezoelectric sensor has a piezoelectric element having a specific axis of sensitivity and a package for the piezoelectric element. The package has a rectangular parallelopiped configuration with opposite longitudinal end surfaces having a height-to-width ratio of about 1:1. External lead electrodes are formed to cover at least the longitudinal end surfaces. A method and apparatus for detecting if the sensor is disposed in the proper posture is also disclosed.Type: GrantFiled: December 22, 2000Date of Patent: August 6, 2002Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Tabota, Mitsugu Ogiura, Toshihiko Unami
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Patent number: 6353325Abstract: A piezoelectric sensor has a piezoelectric element having a specific axis of sensitivity and a package for the piezoelectric element. The package has a rectangular parallelopiped configuration with opposite longitudinal end surfaces having a height-to-width ratio of about 1:1. External lead electrodes are formed to cover at least the longitudinal end surfaces. A method and apparatus for detecting if the sensor is disposed in the proper posture is also disclosed.Type: GrantFiled: October 13, 1998Date of Patent: March 5, 2002Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Tabota, Mitsugu Ogiura, Toshihiko Unami
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Publication number: 20010015103Abstract: A piezoelectric sensor has a piezoelectric element having a specific axis of sensitivity and a package for the piezoelectric element. The package has a rectangular parallelopiped configuration with opposite longitudinal end surfaces having a height-to-width ratio of about 1:1. External lead electrodes are formed to cover at least the longitudinal end surfaces. A method and apparatus for detecting if the sensor is disposed in the proper posture is also disclosed.Type: ApplicationFiled: December 22, 2000Publication date: August 23, 2001Applicant: Murata Manufacturing Co., Ltd.Inventors: Jun Tabota, Mitsugu Ogiura, Toshihiko Unami
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Patent number: 6043588Abstract: A piezoelectric sensor has a piezoelectric element having a specific axis of sensitivity and a package for the piezoelectric element. The package has a rectangular parrallelopiped configuration with opposite longitudinal end surfaces having a height-to-width ratio of about 1:1. External lead electrodes are formed to cover at least the longitudinal end surfaces. A method and apparatus for detecting if the sensor is disposed in the proper posture is also disclosed.Type: GrantFiled: July 18, 1996Date of Patent: March 28, 2000Assignee: Murata Manufacturing Co., Ltd.Inventors: Jun Tabota, Mitsugu Ogiura, Toshihiko Unami