Patents by Inventor Hirokazu Kadowaki
Hirokazu Kadowaki 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: 11946520Abstract: A vibration-damping device includes a housing having a cylindrical mounting hole therein and a vibration-damping member provided in the mounting hole. The vibration-damping member includes an outer cylinder fitted into the mounting hole, an inner cylinder provided in the outer cylinder, and a rubber elastic body inserted between the outer cylinder and the inner cylinder. The rubber elastic body is formed with a bore penetrating in an axial direction thereof and a stopper protruding from a radially-inner wall surface thereof for the bore. The housing is formed with a receiving part which faces the stopper, in a radial direction of the mounting hole, across a gap.Type: GrantFiled: March 14, 2022Date of Patent: April 2, 2024Assignee: YAMASHITA RUBBER CO., LTD.Inventor: Hirokazu Kadowaki
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Patent number: 11927234Abstract: A vibration proofing device includes a bracket having an internal space, and a vibration proofing member inserted into the internal space. The internal space is open on an outer surface of the bracket. At least a pair of facing-each-other surfaces, against which the vibration proofing member is pressed, is formed in an inner surface of the bracket. A distance between the pair of the facing-each-other surfaces on a far side in an insertion direction of the vibration proofing member is the same, in at least some regions of the bracket, as that on a near side in the insertion direction. This provides the vibration proofing device and the bracket to allow for compactly configuring the device as a whole, while sufficiently securing a retaining force between the bracket and the vibration proofing member.Type: GrantFiled: June 3, 2020Date of Patent: March 12, 2024Assignees: YAMASHITA RUBBER CO., LTD., HONDA MOTOR CO., LTD.Inventors: Hirokazu Kadowaki, Masataka Hirano, Yusuke Arai
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Patent number: 11820232Abstract: A torque rod includes: a rod body; a first coupling section provided at one end in an X-axis direction as a longitudinal direction of the rod body and having a first center axis along a Y-axis direction orthogonal to the X-axis direction; and a second coupling section provided at the other end in the X-axis direction of the rod body and being larger than the first coupling section. The first coupling section includes: an outer member having a cylinder shape connected to the rod body; an inner member provided in the center of the outer member; and an elastic member to elastically join the outer member with the inner member, and the elastic member has a spring constant in a Z-axis direction orthogonal to the X-axis direction and the Y-axis direction smaller than a spring constant in the X-axis direction.Type: GrantFiled: September 21, 2021Date of Patent: November 21, 2023Assignee: YAMASHITA RUBBER CO., LTD.Inventor: Hirokazu Kadowaki
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Patent number: 11780311Abstract: A torque rod includes a rod body, a large round portion, and a small round portion. The large round portion is provided at one end of the rod body. The small round portion is provided at the other end of the rod body. The large round portion includes an outer portion, an inner portion, and a joint portion. The outer portion has a tubular shape. The inner portion is provided on an inner side of the outer portion and has an annular opening to which an attaching member is attached. The joint portion elastically joins the outer portion and the inner portion. The inner portion includes a base portion and an extending portion. The base portion has the opening formed therein. The extending portion extends from the base portion toward the small round portion. The joint portion is provided between the extending portion and the outer portion.Type: GrantFiled: December 6, 2021Date of Patent: October 10, 2023Assignee: YAMASHITA RUBBER CO., LTD.Inventor: Hirokazu Kadowaki
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Publication number: 20230052631Abstract: A vibration proofing device (10) includes an insulator (50) interposed between a first attaching member (30) and a second attaching member (40), and is disposed in an internal space (95) of a second bracket (90). The first attaching member (30) is formed to have two side walls (33, 33) parallel to each other to face the inner face of the second bracket (90). The second attaching member (40) is a tubular member having an opening (41a) passing therethrough in an upper-lower direction. At least one of side edge portions of each side wall (33) is disposed outside the opening (41a) of the second attaching member (40). Each side wall (33) is provided on an outer face thereof with a stopper (51) made of an elastic material. With this configuration, it is possible to sufficiently absorb an impact shock resulting from the stopper (51) hitting the second bracket (90).Type: ApplicationFiled: June 2, 2020Publication date: February 16, 2023Inventor: Hirokazu Kadowaki
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Patent number: 11466751Abstract: An anti-vibration device is provided with: an anti-vibration device body, in which an insulator is disposed between a first attachment member and a second attachment member; and a bracket, which has opposing wall portions and to which the anti-vibration device body is fixed by press-fitting via the second attachment member between the wall portions. The second attachment member is provided with interlocking portions that interlock with the wall portions and restrain the anti-vibration device body from moving in the direction opposite the press-fitting direction when the anti-vibration device body is press-fitted to the bracket. Each of the interlocking portions is configured so as to have an arm part extending in the direction opposite the press-fitting direction, and a hook part provided to the extension-direction end of the arm part and caused to interlock with a to-be-interlocked part of one of the wall portions.Type: GrantFiled: September 6, 2017Date of Patent: October 11, 2022Assignee: YAMASHITA RUBBER CO., LTD.Inventor: Hirokazu Kadowaki
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Publication number: 20220307570Abstract: A vibration-damping device includes a housing having a cylindrical mounting hole therein and a vibration-damping member provided in the mounting hole. The vibration-damping member includes an outer cylinder fitted into the mounting hole, an inner cylinder provided in the outer cylinder, and a rubber elastic body inserted between the outer cylinder and the inner cylinder. The rubber elastic body is formed with a bore penetrating in an axial direction thereof and a stopper protruding from a radially-inner wall surface thereof for the bore. The housing is formed with a receiving part which faces the stopper, in a radial direction of the mounting hole, across a gap.Type: ApplicationFiled: March 14, 2022Publication date: September 29, 2022Inventor: Hirokazu Kadowaki
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Publication number: 20220260131Abstract: A vibration proofing device includes a bracket having an internal space, and a vibration proofing member inserted into the internal space. The internal space is open on an outer surface of the bracket. At least a pair of facing-each-other surfaces, against which the vibration proofing member is pressed, is formed in an inner surface of the bracket. A distance between the pair of the facing-each-other surfaces on a far side in an insertion direction of the vibration proofing member is the same, in at least some regions of the bracket, as that on a near side in the insertion direction. This provides the vibration proofing device and the bracket to allow for compactly configuring the device as a whole, while sufficiently securing a retaining force between the bracket and the vibration proofing member.Type: ApplicationFiled: June 3, 2020Publication date: August 18, 2022Inventors: Hirokazu Kadowaki, Masataka Hirano, Yusuke Arai
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Publication number: 20220176792Abstract: A torque rod includes a rod body, a large round portion, and a small round portion. The large round portion is provided at one end of the rod body. The small round portion is provided at the other end of the rod body. The large round portion includes an outer portion, an inner portion, and a joint portion. The outer portion has a tubular shape. The inner portion is provided on an inner side of the outer portion and has an annular opening to which an attaching member is attached. The joint portion elastically joins the outer portion and the inner portion. The inner portion includes a base portion and an extending portion. The base portion has the opening formed therein. The extending portion extends from the base portion toward the small round portion. The joint portion is provided between the extending portion and the outer portion.Type: ApplicationFiled: December 6, 2021Publication date: June 9, 2022Inventor: Hirokazu Kadowaki
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Patent number: 11334102Abstract: A power supply circuitry includes a first transistor, a feedback circuit, a first differential amplifier circuit, a second differential amplifier circuit, and a first control circuit. The first transistor outputs a power supply voltage based on a drive signal. The feedback circuit generates a feedback voltage of the power supply voltage. The first differential amplifier circuit amplifies a difference between the feedback voltage and a reference voltage, and outputs the drive signal. The second differential amplifier circuit amplifies a difference between the reference voltage and the feedback voltage. The first control circuit detects a change in the power supply voltage by using a differentiation circuit and controls the power supply voltage based on an output of the second differential amplifier circuit.Type: GrantFiled: January 14, 2020Date of Patent: May 17, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventor: Hirokazu Kadowaki
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Publication number: 20220089011Abstract: A torque rod includes: a rod body; a first coupling section provided at one end in an X-axis direction as a longitudinal direction of the rod body and having a first center axis along a Y-axis direction orthogonal to the X-axis direction; and a second coupling section provided at the other end in the X-axis direction of the rod body and being larger than the first coupling section. The first coupling section includes: an outer member having a cylinder shape connected to the rod body; an inner member provided in the center of the outer member; and an elastic member to elastically join the outer member with the inner member, and the elastic member has a spring constant in a Z-axis direction orthogonal to the X-axis direction and the Y-axis direction smaller than a spring constant in the X-axis direction.Type: ApplicationFiled: September 21, 2021Publication date: March 24, 2022Inventor: Hirokazu Kadowaki
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Patent number: 11143266Abstract: The present invention provides a liquid-sealed vibration-damping device capable of improving damping performance while preventing increase in size and weight thereof, the liquid-sealed vibration-damping device including: a first attachment member; a second attachment member; an insulator; a vibration-damping unit having a partition member; and a housing space provided in the second attachment member and housing the vibration-damping unit, wherein the second attachment member includes an outer tubular part and a fixing part protruding from the outer tubular part; and a portion of the housing space extends to the fixing part.Type: GrantFiled: April 28, 2016Date of Patent: October 12, 2021Assignee: YAMASHITA RUBBER CO., LTD.Inventor: Hirokazu Kadowaki
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Publication number: 20210064071Abstract: A power supply circuitry includes a first transistor, a feedback circuit, a first differential amplifier circuit, a second differential amplifier circuit, and a first control circuit. The first transistor outputs a power supply voltage based on a drive signal. The feedback circuit generates a feedback voltage of the power supply voltage. The first differential amplifier circuit amplifies a difference between the feedback voltage and a reference voltage, and outputs the drive signal. The second differential amplifier circuit amplifies a difference between the reference voltage and the feedback voltage. The first control circuit detects a change in the power supply voltage by using a differentiation circuit and controls the power supply voltage based on an output of the second differential amplifier circuit.Type: ApplicationFiled: January 14, 2020Publication date: March 4, 2021Inventor: Hirokazu Kadowaki
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Patent number: 10906384Abstract: A vibration prevention device includes a vehicle body-side bracket having an inner space and a vibration prevention member disposed in the inner space. A press-fitting surface and a press-fitting groove are formed on an inner surface of the vehicle body-side bracket. The press-fitting surface and the press-fitting groove extend from an edge portion of the inner space opening through an outer surface of the bracket. The vibration prevention member has a first attachment member, a second attachment member, and an insulator disposed between the first attachment member and the second attachment member. The second attachment member has an abutting portion pressed against the press-fitting surface and an attachment portion press-fitted into the press-fitting groove.Type: GrantFiled: April 23, 2019Date of Patent: February 2, 2021Assignees: YAMASHITA RUBBER CO., LTD., HONDA MOTOR CO., LTD.Inventors: Hirokazu Kadowaki, Masataka Hirano, Yusuke Arai
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Publication number: 20200217391Abstract: An anti-vibration device is provided with: an anti-vibration device body, in which an insulator is disposed between a first attachment member and a second attachment member; and a bracket, which has opposing wall portions and to which the anti-vibration device body is fixed by press-fitting via the second attachment member between the wall portions. The second attachment member is provided with interlocking portions that interlock with the wall portions and restrain the anti-vibration device body from moving in the direction opposite the press-fitting direction when the anti-vibration device body is press-fitted to the bracket. Each of the interlocking portions is configured so as to have an arm part extending in the direction opposite the press-fitting direction, and a hook part provided to the extension-direction end of the arm part and caused to interlock with a to-be-interlocked part of one of the wall portions.Type: ApplicationFiled: September 6, 2017Publication date: July 9, 2020Inventor: Hirokazu Kadowaki
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Publication number: 20190329640Abstract: A vibration prevention device i ncludes a vehicle body-side bracket having an inner space and a vibration prevention member disposed in the inner space. A press-fitting surface and a press-fitting groove are formed on an inner surface of the vehicle body side bracket. The press-fitting surface and the press-fitting groove extend from an edge portion of the inner space opening through an outer surface of the bracket, The vibration prevention member has a first attachment member, a second attachment member, and an insulator disposed between the first attachment member and the second attachment member. The second attachment member has an abutting portion pressed against the press-fitting surface and an attachment portion press-fitted into the press-fitting groove.Type: ApplicationFiled: April 23, 2019Publication date: October 31, 2019Inventors: Hirokazu Kadowaki, Masataka Hirano, Yusuke Arai
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Patent number: 10302166Abstract: A bracket has a cylindrical part which opens in the Y direction. An inner member is arranged within the cylindrical part and faces in the Y direction. An elastic body connects the inner member and the cylindrical part and includes a pair of X direction elastic parts, a projecting part, and a Y-direction elastic part. The X direction elastic parts connect the inner member and the cylindrical part in an X direction. The projecting part is provided in an end in the Y direction of the cylindrical part. The Y direction elastic part is connected to a Y direction supporting part of a bottom wall. The projecting part partially overlaps with the Y direction supporting part of the inner member in the Y direction. No part projects outwardly of the cylindrical part and interferes with the vehicle body or surrounding members, increasing a degree of freedom in layout.Type: GrantFiled: September 18, 2015Date of Patent: May 28, 2019Assignees: YAMASHITA RUBBER KABUSHIKI KAISHA, HONDA MOTOR CO., LTD.Inventors: Hirokazu Kadowaki, Shinji Yamashita
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Patent number: 10054187Abstract: An object of the present invention is to provide a liquid-charged antivibration device for reducing amplitude dependency. Provided is a liquid-charged antivibration device including: a liquid chamber in which operating liquid is charged; and a partitioning member which partitions the liquid chamber into a main liquid chamber and a sub liquid chamber.Type: GrantFiled: September 28, 2016Date of Patent: August 21, 2018Assignee: YAMASHITA RUBBER CO., LTD.Inventors: Hirokazu Kadowaki, Koichi Matsumoto
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Patent number: 10040342Abstract: When an insulator is of non-circular shape, a spring ratio of an X direction to a Y direction is increased by utilizing this non-circular shape. A pair of direction elastic walls opposed to each other in the X direction is formed short and thin in the Y direction and has a small X direction projected area. Similarly, a second mounting metal fitting is formed in a rectangular shape extending long in the X direction and includes a pair of X direction restraint walls opposed to each other in the X direction and a pair of Y direction restraint walls opposed to each other in the Y direction. A first mounting metal fitting includes a pair of X direction restraint projecting parts opposed to each other in the X direction and a pair of Y direction restraint walls opposed to each other in the Y direction.Type: GrantFiled: August 31, 2015Date of Patent: August 7, 2018Assignee: YAMASHITA RUBBER KABUSHIKI KAISHAInventor: Hirokazu Kadowaki
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Patent number: 9982744Abstract: A liquid-sealed vibration damping device is provided that allows an outer cylindrical member to have a substantially uniform interference margin in the circumferential direction, while improving an assembling property. A second mounting member mounted on a non-vibration source includes: a first frame in a cylindrical shape that is connected to a lower portion of an insulator; a second frame in a cylindrical shape that holds a partition member arranged below the insulator; and a connector that connects the first frame with the second frame. The connector includes: engaging parts that are arranged on the first frame; and elastic hook parts that are arranged on the second frame. The elastic hook parts are arranged at intervals on each of main frame parts in the circumferential direction thereof, and the elastic hook parts arranged on corners have lower rigidity than those arranged on the main frame parts.Type: GrantFiled: March 30, 2017Date of Patent: May 29, 2018Assignee: Yamashita Rubber Co., Ltd.Inventor: Hirokazu Kadowaki