Patents by Inventor Masaharu Tsujii
Masaharu Tsujii 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: 10495557Abstract: A hardness tester includes a measurer (CPU) measuring a value for a material characteristic of a sample in conjunction with formation of an indentation, an acquirer (CPU) acquiring measurement data associated with the value for the material characteristic of the sample measured by the measurer, and a determiner (CPU) accumulating a predetermined value for the material characteristic based on the measurement data acquired by the acquirer and determining a time to replace the indenter based on the accumulated value for the material characteristic.Type: GrantFiled: January 12, 2018Date of Patent: December 3, 2019Assignee: MITUTOYO CORPORATIONInventors: Masaharu Tsujii, Satoko Mori, Takayuki Yamada
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Publication number: 20180217040Abstract: A hardness tester includes a measurer (CPU) measuring a value for a material characteristic of a sample in conjunction with formation of an indentation, an acquirer (CPU) acquiring measurement data associated with the value for the material characteristic of the sample measured by the measurer, and a determiner (CPU) accumulating a predetermined value for the material characteristic based on the measurement data acquired by the acquirer and determining a time to replace the indenter based on the accumulated value for the material characteristic.Type: ApplicationFiled: January 12, 2018Publication date: August 2, 2018Applicant: MITUTOYO CORPORATIONInventors: Masaharu TSUJII, Satoko MORI, Takayuki YAMADA
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Publication number: 20170102305Abstract: A hardness tester loads a predetermined test force on an indenter and presses into a surface of a sample to form an indentation. The indenter includes an indenter memory storing indenter information specific to the indenter. The indenter is detachably mounted to an indenter shaft. A CPU acquires, from the indenter memory, the indenter information of the indenter mounted to the indenter shaft, and uses the acquired indenter information to perform a predetermined operation and calculate hardness.Type: ApplicationFiled: September 30, 2016Publication date: April 13, 2017Applicant: MITUTOYO CORPORATIONInventors: Masaharu TSUJII, Satoko MORI, Takayuki YAMADA
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Patent number: 9354042Abstract: A coordinate measuring system includes a probe provided with first to ninth infrared LEDs, and an image capture apparatus and calculation controller detecting the position of the probe. The probe includes a distance obtainer acquiring distance data for a distance from the probe to the image capture apparatus; and an illumination controller controlling an illumination time of the first to ninth infrared LEDs based on the distance represented by the distance data.Type: GrantFiled: April 30, 2015Date of Patent: May 31, 2016Assignee: MITUTOYO CORPORATIONInventors: Masaharu Tsujii, Satoko Mori
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Patent number: 9341554Abstract: A hardness tester has a test force applier generating a test force using an electromagnetic force generated by supplying a current to a drive coil provided in a magnetic field and applies the test force to an indenter to press the indenter into a surface of a sample; a temperature detector detecting a temperature of the test force applier; and a test force corrector correcting the test force generated from the test force applier based on the temperature detected by the temperature detector.Type: GrantFiled: February 28, 2014Date of Patent: May 17, 2016Assignee: MITUTOYO CORPORATIONInventors: Masaharu Tsujii, Satoko Mori
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Publication number: 20150323308Abstract: A coordinate measuring system includes a probe provided with first to ninth infrared LEDs, and an image capture apparatus and calculation controller detecting the position of the probe. The probe includes a distance obtainer acquiring distance data for a distance from the probe to the image capture apparatus; and an illumination controller controlling an illumination time of the first to ninth infrared LEDs based on the distance represented by the distance data.Type: ApplicationFiled: April 30, 2015Publication date: November 12, 2015Applicant: MITUTOYO CORPORATIONInventors: Masaharu TSUJII, Satoko MORI
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Publication number: 20140250989Abstract: A hardness tester has a test force applier generating a test force using an electromagnetic force generated by supplying a current to a drive coil provided in a magnetic field and applies the test force to an indenter to press the indenter into a surface of a sample; a temperature detector detecting a temperature of the test force applier; and a test force corrector correcting the test force generated from the test force applier based on the temperature detected by the temperature detector.Type: ApplicationFiled: February 28, 2014Publication date: September 11, 2014Applicant: MITUTOYO CORPORATIONInventors: Masaharu TSUJII, Satoko MORI
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Patent number: 7380443Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.Type: GrantFiled: August 30, 2006Date of Patent: June 3, 2008Assignee: Mitutoyo CorporationInventors: Masaharu Tsujii, Fumihiko Koshimizu, Eiji Furuta, Ryouji Nakamura, Satoko Nomaguchi, Ryotaro Fukuchi
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Publication number: 20060288763Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.Type: ApplicationFiled: August 30, 2006Publication date: December 28, 2006Applicant: MITUTOYO CORPORATIONInventors: Masaharu Tsujii, Fumihiko Koshimizu, Eiji Furuta, Ryouji Nakamura, Satoko Nomaguchi, Ryotaro Fukuchi
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Patent number: 7121136Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.Type: GrantFiled: December 24, 2003Date of Patent: October 17, 2006Assignee: Mitutoyo CorporationInventors: Masaharu Tsujii, Fumihiko Koshimizu, Eiji Furuta, Ryouji Nakamura, Satoko Nomaguchi, Ryotaro Fukuchi
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Publication number: 20040134263Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.Type: ApplicationFiled: December 24, 2003Publication date: July 15, 2004Applicant: AKASHI CORPORATIONInventors: Masaharu Tsujii, Fumihiko Koshimizu, Eiji Furuta, Ryouji Nakamura, Satoko Nomaguchi, Ryotaro Fukuchi
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Patent number: 6279388Abstract: A method for calibrating an apparatus for calibrating a hardness tester, the method comprising the steps of: setting a plurality of calibration points between a rated force point at which a rated force of a force measuring member is applied and a zero point at which no-load is applied, for measuring outputs (mV/V) from the force measuring member according to test forces(N) applied to the force measuring member; and calculating a relation between the test forces(N) and the outputs(mV/V) as an approximation based on the test forces(N) and the outputs(mV/V) according to the test forces(N) at the calibration points. An apparatus for evaluating a dynamic characteristic of a specimen, which installed in a hardness tester, the apparatus comprising: a force measuring member; a force transmitting portion which is movable up and down; a distance measuring member incorporated in the force transmitting portion to be contacted with the force measuring member from above; and an indenter.Type: GrantFiled: March 26, 1999Date of Patent: August 28, 2001Assignee: Akashi CorporationInventors: Masaharu Tsujii, Fumihiko Koshimizu