Patents by Inventor Naoya KUROIWA
Naoya KUROIWA 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: 20230396122Abstract: A fluid supply device includes an electric motor, an exterior case, a fixing member, a harness, a lid which includes a holding portion, and a stopper. An elastic member, which has annular-shaped, is disposed in a compressed manner between the outer circumferential surface of the electric motor and the inner circumferential surface of the exterior case. The elastic member is compressed to apply a restoring force to the electric motor in a radial direction of the electric motor, and apply a restoring force to the holding portion of the lid.Type: ApplicationFiled: August 11, 2023Publication date: December 7, 2023Applicant: Hitachi Astemo, Ltd.Inventor: Naoya KUROIWA
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Patent number: 11760149Abstract: The fluid supply device comprises a screw, which has a male thread formed thereon and rotates, and a nut, which has a female thread formed therein that meshes with the male threading and which, by the screw rotating in a first direction, i.e., the circumferential direction, moves towards a first end in the rotation axis direction, and which, by moving with said movement a piston that forms a reservoir chamber, discharges a fluid stored in the reservoir chamber, wherein, if the fluid is discharged and if the screw is not rotating, first surfaces which form the threading of the male screw and second surfaces which form the threading of the female screw are in contact with each other, and second surfaces which form the threading of the male screw and first surfaces which form the threading of the female screw are not in contact with each other.Type: GrantFiled: March 15, 2022Date of Patent: September 19, 2023Assignee: Hitachi Astemo, Ltd.Inventor: Naoya Kuroiwa
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MOTOR CONTROL METHOD, FLUID SUPPLY DEVICE, VEHICLE HEIGHT ADJUSTMENT DEVICE, AND SADDLE-TYPE VEHICLE
Publication number: 20230242207Abstract: A motor control method includes a determination step of determining whether a contact portion exists, which is a portion where the screw and the nut member are in contact with each other at a location different from a mating portion, when the motor is energized to move the nut member in a first direction, and when the contact portion is determined to exist in the determination step, a return step of energizing the motor to move the nut member in a second direction opposite to the first direction until the contact portion no longer exists.Type: ApplicationFiled: April 12, 2023Publication date: August 3, 2023Applicant: Hitachi Astemo, Ltd.Inventor: Naoya KUROIWA -
Patent number: 11391338Abstract: A shock absorber includes a cylinder which is a conductor; a rod inserted into the cylinder from one end side of the cylinder, a suspension spring arranged outside the cylinder, a spring receiver which receives a load of the suspension spring on the one end side of the rod, and a protective member arranged on the one end side of the rod and configured to protect the rod. The protective member has a coil configured to detect a relative position between the cylinder and the protective member, and an end portion formed on the one end side of the protective member is arranged so as not to receive a load from the spring receiver.Type: GrantFiled: February 14, 2020Date of Patent: July 19, 2022Assignee: HITACHI ASTEMO, LTD.Inventors: Naoya Kuroiwa, Yosuke Fujikawa, Yosuke Murakami
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Publication number: 20220203798Abstract: The fluid supply device comprises a screw, which has a male thread formed thereon and rotates, and a nut, which has a female thread formed therein that meshes with the male threading and which, by the screw rotating in a first direction, i.e., the circumferential direction, moves towards a first end in the rotation axis direction, and which, by moving with said movement a piston that forms a reservoir chamber, discharges a fluid stored in the reservoir chamber, wherein, if the fluid is discharged and if the screw is not rotating, first surfaces which form the threading of the male screw and second surfaces which form the threading of the female screw are in contact with each other, and second surfaces which form the threading of the male screw and first surfaces which form the threading of the female screw are not in contact with each other.Type: ApplicationFiled: March 15, 2022Publication date: June 30, 2022Applicant: Hitachi Astemo, Ltd.Inventor: Naoya KUROIWA
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Patent number: 11313428Abstract: A stroke sensor system includes a conductor, a coil which moves relative to the conductor and is fitted to one end side of the conductor; and a ferromagnetic body which is arranged on an end position side of the coil. A position of an end portion on one end side of the conductor in a state where a fitting ratio between the conductor and the coil is maximized is defined as the end position. The ferromagnetic body is located on an opposite side to the conductor with the coil interposed therebetween.Type: GrantFiled: February 24, 2020Date of Patent: April 26, 2022Assignee: HITACHI ASTEMO, LTD.Inventors: Masato Tokuhara, Kota Suzuki, Yosuke Fujikawa, Naoya Kuroiwa, Yosuke Murakami
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Patent number: 11149815Abstract: A shock absorber includes a hollow rod, a suspension spring arranged outside the hollow rod, a spring receiver arranged to be displaceable with respect to the hollow rod and receiving a load of the suspension spring, an adjusting screw inserted into one end side of the hollow rod and configured to adjust a position of the suspension spring by restricting movement of the spring receiver to the one end side, and a shaft member which transmits a load received by the spring receiver to the adjusting screw inside the hollow rod. An insertion portion which extends in an axial direction of the hollow rod and into which the shaft member is inserted is provided on a side surface of the hollow rod.Type: GrantFiled: February 24, 2020Date of Patent: October 19, 2021Assignee: Showa CorporationInventors: Naoya Kuroiwa, Yosuke Fujikawa, Yosuke Murakami
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Publication number: 20210245832Abstract: A hydraulic shock absorber includes an enclosure member. The enclosure member has an inflow path which guides oil from the outside to the inside. The inflow path is arranged so that an axis of the inflow path deviates from a central axis of a rod.Type: ApplicationFiled: April 26, 2021Publication date: August 12, 2021Applicant: HITACHI ASTEMO, LTD.Inventors: Naoya KUROIWA, Yosuke MURAKAMI
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Patent number: 10919595Abstract: A hydraulic shock absorber includes a control valve. The control valve includes a valve seat formed with a closing face, a valve body configured to come into contact with the closing face, and a valve shaft configured to transmit an operation force applied from a driving unit to the valve body. The control valve is defined with an upstream side flow channel extending from an inlet coupled to the upper end opening, via a space in which the valve body moves, to the closing face, and a downstream side flow channel extending from the closing face to an outlet. The control valve is disposed above the cylinder so that a central axis of the valve shaft is inclined relative to a central axis of the vehicle body side tube and the wheel side tube.Type: GrantFiled: February 8, 2017Date of Patent: February 16, 2021Assignee: Showa CorporationInventors: Yosuke Murakami, Kazuhiro Miwa, Naoya Kuroiwa
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Patent number: 10876590Abstract: There is provided a compact damping force variable shock absorber capable of implementing different adjustments for a compression-side stroke and an extension-side stroke as initial settings. A damping force variable device in one embodiment includes: a main valve that opens and closes to control flow of oil caused by sliding of a piston in a cylinder, thereby generating damping force; a pilot chamber into which a portion of the flow of the oil is introduced so that internal pressure is applied to the main valve in a valve-closing direction; a pilot valve that opens and closes to adjust the internal pressure of the pilot chamber; and a communication passage that communicates the pilot chamber with a rod-side oil chamber or a piston-side fluid chamber.Type: GrantFiled: March 20, 2019Date of Patent: December 29, 2020Assignee: Showa CorporationInventors: Kazuhiro Miwa, Naoya Kuroiwa
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Publication number: 20200191233Abstract: A shock absorber includes a hollow rod, a suspension spring arranged outside the hollow rod, a spring receiver arranged to be displaceable with respect to the hollow rod and receiving a load of the suspension spring, an adjusting screw inserted into one end side of the hollow rod and configured to adjust a position of the suspension spring by restricting movement of the spring receiver to the one end side, and a shaft member which transmits a load received by the spring receiver to the adjusting screw inside the hollow rod. An insertion portion which extends in an axial direction of the hollow rod and into which the shaft member is inserted is provided on a side surface of the hollow rod.Type: ApplicationFiled: February 24, 2020Publication date: June 18, 2020Applicant: Showa CorporationInventors: Naoya KUROIWA, Yosuke FUJIKAWA, Yosuke MURAKAMI
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Publication number: 20200191228Abstract: A stroke sensor system includes a conductor, a coil which moves relative to the conductor and is fitted to one end side of the conductor; and a ferromagnetic body which is arranged on an end position side of the coil. A position of an end portion on one end side of the conductor in a state where a fitting ratio between the conductor and the coil is maximized is defined as the end position. The ferromagnetic body is located on an opposite side to the conductor with the coil interposed therebetween.Type: ApplicationFiled: February 24, 2020Publication date: June 18, 2020Applicant: Showa CorporationInventors: Masato TOKUHARA, Kota SUZUKI, Yosuke FUJIKAWA, Naoya KUROIWA, Yosuke MURAKAMI
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Publication number: 20200182325Abstract: A shock absorber includes a cylinder which is a conductor; a rod inserted into the cylinder from one end side of the cylinder, a suspension spring arranged outside the cylinder, a spring receiver which receives a load of the suspension spring on the one end side of the rod, and a protective member arranged on the one end side of the rod and configured to protect the rod. The protective member has a coil configured to detect a relative position between the cylinder and the protective member, and an end portion formed on the one end side of the protective member is arranged so as not to receive a load from the spring receiver.Type: ApplicationFiled: February 14, 2020Publication date: June 11, 2020Applicant: Showa CorporationInventors: Naoya KUROIWA, Yosuke FUJIKAWA, Yosuke MURAKAMI
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Publication number: 20190219126Abstract: There is provided a compact damping force variable shock absorber capable of implementing different adjustments for a compression-side stroke and an extension-side stroke as initial settings. A damping force variable device in one embodiment includes: a main valve that opens and closes to control flow of oil caused by sliding of a piston in a cylinder, thereby generating damping force; a pilot chamber into which a portion of the flow of the oil is introduced so that internal pressure is applied to the main valve in a valve-closing direction; a pilot valve that opens and closes to adjust the internal pressure of the pilot chamber; and a communication passage that communicates the pilot chamber with a rod-side oil chamber or a piston-side fluid chamber.Type: ApplicationFiled: March 20, 2019Publication date: July 18, 2019Applicant: Showa CorporationInventors: Kazuhiro MIWA, Naoya KUROIWA
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Publication number: 20190127016Abstract: A hydraulic shock absorber includes a control valve. The control valve includes a valve seat formed with a closing face, a valve body configured to come into contact with the closing face, and a valve shaft configured to transmit an operation force applied from a driving unit to the valve body. The control valve is defined with an upstream side flow channel extending from an inlet coupled to the upper end opening, via a space in which the valve body moves, to the closing face, and a downstream side flow channel extending from the closing face to an outlet. The control valve is disposed above the cylinder so that a central axis of the valve shaft is inclined relative to a central axis of the vehicle body side tube and the wheel side tube.Type: ApplicationFiled: February 8, 2017Publication date: May 2, 2019Applicant: Showa CorporationInventors: Yosuke MURAKAMI, Kazuhiro MIWA, Naoya KUROIWA
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Patent number: 9849934Abstract: A shock absorber includes a cylinder in which oil is sealed, a piston slidably fitted into the cylinder, a piston rod connected to the piston and extending to the outside of the cylinder, and a damping force generating apparatus controlling a flow of the oil generated by the sliding of the piston inside the cylinder. The damping force generating apparatus includes a valve body generating a damping force by being opened and closed on a flow path in which the oil flows, a valve seat closing the flow path when the valve body is seated, and an actuator generating thrust to the valve body in a valve closing direction. The valve seat has a first elastic body which is elastically deformable in the valve closing direction of the valve body.Type: GrantFiled: March 10, 2016Date of Patent: December 26, 2017Assignee: SHOWA CORPORATIONInventors: Kazuhiro Miwa, Naoya Kuroiwa
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Publication number: 20160369862Abstract: There is provided a compact damping force variable shock absorber capable of implementing different adjustments for a compression-side stroke and an extension-side stroke as initial settings. A damping force variable device in one embodiment includes: a main valve that opens and closes to control flow of oil caused by sliding of a piston in a cylinder, thereby generating damping force; a pilot chamber into which a portion of the flow of the oil is introduced so that internal pressure is applied to the main valve in a valve-closing direction; a pilot valve that opens and closes to adjust the internal pressure of the pilot chamber; and a communication passage that communicates the pilot chamber with a rod-side oil chamber or a piston-side fluid chamber.Type: ApplicationFiled: June 16, 2016Publication date: December 22, 2016Applicant: Showa CorporationInventors: Kazuhiro MIWA, Naoya KUROIWA
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Publication number: 20160288869Abstract: A shock absorber includes a cylinder in which oil is sealed, a piston slidably fitted into the cylinder, a piston rod connected to the piston and extending to the outside of the cylinder, and a damping force generating apparatus controlling a flow of the oil generated by the sliding of the piston inside the cylinder. The damping force generating apparatus includes a valve body generating a damping force by being opened and closed on a flow path in which the oil flows, a valve seat closing the flow path when the valve body is seated, and an actuator generating thrust to the valve body in a valve closing direction. The valve seat has a first elastic body which is elastically deformable in the valve closing direction of the valve body.Type: ApplicationFiled: March 10, 2016Publication date: October 6, 2016Applicant: Showa CorporationInventors: Kazuhiro MIWA, Naoya KUROIWA