Patents by Inventor Mikio Arai
Mikio Arai 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: 20230223044Abstract: A base plate includes a plate body and a connection portion provided at the plate body. The connection portion includes a through hole gassing through the plate body in a thickness direction of the plate body, a plurality of protrusions provided along an edge of the through hole in a circumferential direction about a central axis of the through hole and inserted into an attachment hole provided in the arm, and an inner circumferential surface formed by the plurality of protrusions and the through hole. The inner circumferential surface includes a plurality of recesses formed between the plurality of protrusions.Type: ApplicationFiled: January 5, 2023Publication date: July 13, 2023Applicant: NHK SPRING CO., LTD.Inventors: Mikio ARAI, Hiroshi DAIFUKU
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Patent number: 10101253Abstract: The present invention provides a method of surely detecting a crack in piezoelectric elements regardless of size of the crack. The method includes applying voltage to a first piezoelectric element of a pair of piezoelectric elements to cause deformation in the first piezoelectric element, forcibly deforming a second piezoelectric element of the pair of the piezoelectric elements to generate voltage from the second piezoelectric element according to the deformation of the first piezoelectric element, finding a transfer function of the pair of the piezoelectric elements based on values of the applied voltage and the generated voltage, and detecting presence or absence of a crack in the pair of the piezoelectric elements based on an objective value obtained from the found transfer function.Type: GrantFiled: March 3, 2017Date of Patent: October 16, 2018Assignee: NHK Spring Co., Ltd.Inventor: Mikio Arai
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Patent number: 9905252Abstract: A head suspension includes a base to be attached to a carriage, a load beam having a rigid part and a resilient part that connects the rigid part to the base, the load beam applying load onto a read/write head, a flexure attached to the load beam and supporting the head, an actuator attaching part located between the base and the head, and a piezoelectric element being deformable in response to a voltage applied thereto to move the head in a sway direction relative to the base. For the head suspension, it bonds the piezoelectric element with a bonding tape to the actuator attaching part and applies an adhesive to fix the piezoelectric element to the actuator attaching part.Type: GrantFiled: June 17, 2014Date of Patent: February 27, 2018Assignee: NHK Spring Co., Ltd.Inventor: Mikio Arai
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Publication number: 20170268973Abstract: The present invention provides a method of surely detecting a crack in piezoelectric elements regardless of size of the crack. The method includes applying voltage to a first piezoelectric element of a pair of piezoelectric elements to cause deformation in the first piezoelectric element, forcibly deforming a second piezoelectric element of the pair of the piezoelectric elements to generate voltage from the second piezoelectric element according to the deformation of the first piezoelectric element, finding a transfer function of the pair of the piezoelectric elements based on values of the applied voltage and the generated voltage, and detecting presence or absence of a crack in the pair of the piezoelectric elements based on an objective value obtained from the found transfer function.Type: ApplicationFiled: March 3, 2017Publication date: September 21, 2017Inventor: Mikio ARAI
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Patent number: 9638650Abstract: A piezoelectric element feeder for feeding a piezoelectric element, includes a drawing unit that draws a first electrode surface of the piezoelectric element with use of negative pressure and transfers the piezoelectric element onto the actuator attaching part and a probe movably supported with the drawing unit and used to measure electric characteristics of the piezoelectric element. A front end of the probe is brought into contact with the first electrode surface when or just before the drawing unit draws the first electrode surface, to enable a measurement of the electric characteristics of the piezoelectric element.Type: GrantFiled: September 4, 2013Date of Patent: May 2, 2017Assignee: NHK Spring Co., Ltd.Inventor: Mikio Arai
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Patent number: 8878554Abstract: A method of testing a fitted state of a pair of piezoelectric elements fitted to form an actuator between a base member and a movable member, the piezoelectric elements in the actuator being arranged side by side in opposite polarity and being electrically connected in parallel with each other, and when a voltage is applied to the piezoelectric elements, minutely moving the movable member relative to the base member in a direction in which the piezoelectric members are arranged side by side. The method detects changes in capacitance of the piezoelectric elements with respect to changes in bias voltage applied to the piezoelectric elements, the bias voltage being changed within a predetermined range, and determines a fitted state of the piezoelectric elements according to a characteristic of the detected capacitance changes. The method correctly and easily determines whether or not the piezoelectric elements are correctly fitted to the actuator.Type: GrantFiled: October 12, 2011Date of Patent: November 4, 2014Assignee: NHK Spring Co., Ltd.Inventor: Mikio Arai
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Publication number: 20140290842Abstract: A head suspension includes a base to be attached to a carriage, a load beam having a rigid part and a resilient part that connects the rigid part to the base, the load beam applying load onto a read/write head, a flexure attached to the load beam and supporting the head, an actuator attaching part located between the base and the head, and a piezoelectric element being deformable in response to a voltage applied thereto to move the head in a sway direction relative to the base. For the head suspension, it bonds the piezoelectric element with a bonding tape to the actuator attaching part and applies an adhesive to fix the piezoelectric element to the actuator attaching part.Type: ApplicationFiled: June 17, 2014Publication date: October 2, 2014Inventor: Mikio ARAI
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Patent number: 8837091Abstract: A head suspension includes a base to be attached to a carriage, a load beam having a rigid part and a resilient part that connects the rigid part to the base, the load beam applying load onto a read/write head, a flexure attached to the load beam and supporting the head, an actuator attaching part located between the base and the head, and a piezoelectric element being deformable in response to a voltage applied thereto to move the head in a sway direction relative to the base. For the head suspension, it bonds the piezoelectric element with a bonding tape to the actuator attaching part and applies an adhesive to fix the piezoelectric element to the actuator attaching part.Type: GrantFiled: October 7, 2013Date of Patent: September 16, 2014Assignee: NHK Spring Co., Ltd.Inventor: Mikio Arai
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Patent number: 8760813Abstract: A terminal area includes a metal plate, an electrically insulating layer, and a conductor layer. An opening section is formed in the metal plate and the insulating layer. A gold plating layer is formed on a surface of the conductor layer inside the opening section. A porous metal layer of a first transition element is formed on a surface of the gold plating layer. Through-holes of the porous metal layer reach the surface of the gold plating layer. An electrically conductive adhesive is provided between an electrode of an actuator element and the porous metal layer. An anchor portion of the electrically conductive adhesive gets into the through-holes and is cured. Conductive particles of the electrically conductive adhesive contact the gold plating layer.Type: GrantFiled: April 5, 2013Date of Patent: June 24, 2014Assignee: NHK Spring Co., Ltd.Inventor: Mikio Arai
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Publication number: 20140104728Abstract: A head suspension includes a base to be attached to a carriage, a load beam having a rigid part and a resilient part that connects the rigid part to the base, the load beam applying load onto a read/write head, a flexure attached to the load beam and supporting the head, an actuator attaching part located between the base and the head, and a piezoelectric element being deformable in response to a voltage applied thereto to move the head in a sway direction relative to the base. For the head suspension, it bonds the piezoelectric element with a bonding tape to the actuator attaching part and applies an adhesive to fix the piezoelectric element to the actuator attaching part.Type: ApplicationFiled: October 7, 2013Publication date: April 17, 2014Applicant: NHK Spring Co., Ltd.Inventor: Mikio ARAI
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Publication number: 20140077793Abstract: A piezoelectric element feeder for feeding a piezoelectric element, includes a drawing unit that draws a first electrode surface of the piezoelectric element with use of negative pressure and transfers the piezoelectric element onto the actuator attaching part and a probe movably supported with the drawing unit and used to measure electric characteristics of the piezoelectric element. A front end of the probe is brought into contact with the first electrode surface when or just before the drawing unit draws the first electrode surface, to enable a measurement of the electric characteristics of the piezoelectric element.Type: ApplicationFiled: September 4, 2013Publication date: March 20, 2014Applicant: NHK SPRING CO., LTD.Inventor: Mikio ARAI
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Publication number: 20130314821Abstract: A terminal area includes a metal plate, an electrically insulating layer, and a conductor layer. An opening section is formed in the metal plate and the insulating layers A gold plating layer is formed on a surface of the conductor layer inside the opening section. A porous metal layer of a first transition element is formed on a surface of the gold plating layer. Through-holes of the porous metal layer reach the surface of the gold plating layer. An electrically conductive adhesive is provided between an electrode of an actuator element and the porous metal layer. An anchor portion of the electrically conductive adhesive gets into the through holes and is cured. Conductive particles of the electrically conductive adhesive contact the gold plating layer.Type: ApplicationFiled: April 5, 2013Publication date: November 28, 2013Applicant: NHK SPRING CO., LTD.Inventor: Mikio Arai
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Publication number: 20120127614Abstract: A method of testing a fitted state of a pair of piezoelectric elements fitted to form an actuator between a base member and a movable member, the piezoelectric elements in the actuator being arranged side by side in opposite polarity and being electrically connected in parallel with each other, and when a voltage is applied to the piezoelectric elements, minutely moving the movable member relative to the base member in a direction in which the piezoelectric members are arranged side by side. The method detects changes in capacitance of the piezoelectric elements with respect to changes in bias voltage applied to the piezoelectric elements, the bias voltage being changed within a predetermined range, and determines a fitted state of the piezoelectric elements according to a characteristic of the detected capacitance changes. The method correctly and easily determines whether or not the piezoelectric elements are correctly fitted to the actuator.Type: ApplicationFiled: October 12, 2011Publication date: May 24, 2012Applicant: NHK SPRING CO., LTD.Inventor: Mikio ARAI
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Patent number: 8166826Abstract: A vibration characteristic measuring device is provided with a shaker, including a shaking section which reciprocates along an axis, and a mounting block fastened to a mounting surface of the shaking section. A disk drive suspension is mounted on the mounting block. The mounting block has a facing surface which faces the mounting surface of the shaking section. An adhesive member formed of a resin tape is disposed between the mounting surface and the facing surface of the mounting block. The adhesive member is deformable depending on a gap between the mounting surface and the facing surface. The adhesive member closely contacts both the mounting surface and the facing surface without a gap.Type: GrantFiled: March 5, 2009Date of Patent: May 1, 2012Assignee: NHK Spring Co., Ltd.Inventors: Hajime Tada, Mikio Arai
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Publication number: 20090223297Abstract: A vibration characteristic measuring device is provided with a shaker, including a shaking section which reciprocates along an axis, and a mounting block fastened to a mounting surface of the shaking section. A disk drive suspension is mounted on the mounting block. The mounting block has a facing surface which faces the mounting surface of the shaking section. An adhesive member formed of a resin tape is disposed between the mounting surface and the facing surface of the mounting block. The adhesive member is deformable depending on a gap between the mounting surface and the facing surface. The adhesive member closely contacts both the mounting surface and the facing surface without a gap.Type: ApplicationFiled: March 5, 2009Publication date: September 10, 2009Applicant: NHK Spring Co., Ltd.Inventors: Hajime Tada, Mikio Arai
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Patent number: 5801162Abstract: Dermatan sulfate compositions having certain characteristics have been found to have thrombolytic activity. Dermatan sulfate combined with tissue plasminogen activator (t-PA) enhances the thrombolytic activity of t-PA. Antithrombotic compositions containing dermatan sulfates can be used for treating various thrombotic diseases.Type: GrantFiled: August 28, 1995Date of Patent: September 1, 1998Assignee: Seikagaku Kogyo Kabushiki Kaisha (Seikagaku Corporation)Inventors: Akikazu Takada, Junichi Onaya, Mikio Arai, Satoshi Miyauchi, Mamoru Kyogashima, Keiichi Yoshida
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Patent number: 3961041Abstract: Therapeutic levels of L-DOPA are achieved by orally administering a pharmaceutical effervescent-enteric coated tablet comprising:A. a member selected from the group consisting of L-DOPA or a derivative thereof capable of enzymatically cleaving and reverting to L-DOPA in vivo,B. a non-toxic pharmaceutically acceptable inert diluent,C. a non-toxic pharmaceutically acceptable carbon dioxide releasing agent,D. a non-toxic pharmaceutically acceptable effervescing agent, andE. a non-toxic pharmaceutically acceptable enteric coating.This composition is extremely useful in the treatment of Parkinsonism. When administered to warm-blooded animals (e.g., humans), superior therapeutic blood levels of L-DOPA are observed over that normally observed with conventional enteric coated formulations.Type: GrantFiled: April 10, 1975Date of Patent: June 1, 1976Assignee: Interx Research CorporationInventors: Kenji Nishimura, Mikio Arai, Kunihiro Sasahara, Takashi Nitanai