Patents by Inventor Junichi Kurokawa
Junichi Kurokawa 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: 11691265Abstract: A robot includes a base installed on an installation surface, a robot arm coupled to the base, a force detection section coupled to the base and detecting a force applied to the robot arm, a coupling member having a plurality of convex parts provided between the installation surface and the force detection section, projecting toward the force detection section side, and contacting the force detection section, and first fixing members provided in positions where the convex parts are provided and fixing the force detection section and the coupling member.Type: GrantFiled: October 30, 2020Date of Patent: July 4, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Kazuto Yoshimura, Junichi Kurokawa, Yoshiteru Nishimura, Etsuo Tsuji
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Patent number: 11458616Abstract: A robot includes a base, a robot arm having a first arm coupled to the base and rotating about a first axis, and a force detection unit provided in the base and detecting a force acting on the base or the robot arm, wherein the first arm is coupled to the base in a position shifted from a first center line passing through a center of the base and being parallel to the first axis, and a second center line passing through a center of the force detection unit and being parallel to the first axis is closer to the first axis than the first center line.Type: GrantFiled: June 26, 2020Date of Patent: October 4, 2022Inventor: Junichi Kurokawa
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Publication number: 20210129315Abstract: A robot includes a base installed on an installation surface, a robot arm coupled to the base, a force detection section coupled to the base and detecting a force applied to the robot arm, a coupling member having a plurality of convex parts provided between the installation surface and the force detection section, projecting toward the force detection section side, and contacting the force detection section, and first fixing members provided in positions where the convex parts are provided and fixing the force detection section and the coupling member.Type: ApplicationFiled: October 30, 2020Publication date: May 6, 2021Inventors: Kazuto YOSHIMURA, Junichi KUROKAWA, Yoshiteru NISHIMURA, Etsuo TSUJI
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Publication number: 20200406451Abstract: A robot includes a base, a robot arm having a first arm coupled to the base and rotating about a first axis, and a force detection unit provided in the base and detecting a force acting on the base or the robot arm, wherein the first arm is coupled to the base in a position shifted from a first center line passing through a center of the base and being parallel to the first axis, and a second center line passing through a center of the force detection unit and being parallel to the first axis is closer to the first axis than the first center line.Type: ApplicationFiled: June 26, 2020Publication date: December 31, 2020Inventor: Junichi KUROKAWA
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Patent number: 8469654Abstract: A rotary-type fluid machine which enables practical and effective operation in an extremely low specific speed range. The rotary-type fluid machine (1, 1?) has an impeller (10, 10?) integrally connected to a rotating drive shaft (2). The impeller is accommodated in a casing (3). Fluid (a) of a suction fluid passage (4) to be pumped flows into a center part (11) of the impeller. The fluid (b) is discharged from a peripheral portion (12) of the impeller by the effect of the centrifugal force of the rotating impeller, so that the fluid is delivered through a delivery fluid passage (5) outside of the casing. Many grooves (15) extending toward a peripheral edge of the impeller from the center part of the impeller are formed on the impeller. The groove opens on an outer circumferential surface (18) of the impeller, and causes strong recirculation vortices (R) to be formed in the vicinity of the peripheral edge of the impeller when the impeller rotates.Type: GrantFiled: January 14, 2009Date of Patent: June 25, 2013Assignee: National University Corporation Yokohama National UniversityInventors: Junichi Kurokawa, Shuusaku Kagawa
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Publication number: 20100322771Abstract: The present invention provides a rotary-type fluid machine which enables practical and effective operation in an extremely low specific speed range. The rotary-type fluid machine (1, 1?) has an impeller (10, 10?) integrally connected to a rotating drive shaft (2). The impeller is accommodated in a casing (3). Fluid (a) of a suction fluid passage (4) to be pumped flows into a center part (11) of the impeller. The fluid (b) is discharged from a peripheral portion (12) of the impeller by the effect of the centrifugal force of the rotating impeller, so that the fluid is delivered through a delivery fluid passage (5) outside of the casing. Many grooves (15) extending toward a peripheral edge of the impeller from the center part of the impeller are formed on the impeller. The groove opens on an outer circumferential surface (18) of the impeller, and causes strong recirculation vortices (R) to be formed in the vicinity of the peripheral edge of the impeller when the impeller rotates.Type: ApplicationFiled: January 14, 2009Publication date: December 23, 2010Applicant: National University Corporation Yokohama National UniversityInventors: Junichi Kurokawa, Shuusaku Kagawa
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Patent number: 6736594Abstract: In an axial flow hydraulic machine, a plural number of grooves 5 are formed on an inner surface of a casing, directed into a pressure gradient direction, for connecting between an inlet side of an impeller 1 and an inside of blade residing region on the casing inner surface. With movement of movable members 6 provided on the casing inner surface, the grooves appear within the blade residing region in an unstable operation region, while the grooves cause no interference with the blades of the impeller in a stable operation region.Type: GrantFiled: June 27, 2002Date of Patent: May 18, 2004Assignees: Hitachi, Ltd., Junichi KurokawaInventors: Kouichi Irie, Tomoyoshi Okamura, Yoshio Anzai, Junichi Kurokawa
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Patent number: 6582189Abstract: For improving characteristic uprising at the right-hand side of head-flow rate characteristic of a turbo machine, as well as for suppressing increase of vibration and/or noises thereof, a plurality of first grooves 24 in direction of gradient in pressure of fluid are formed on an inner flow surface of a casing, for connecting an inlet side of blades of an impeller and an area on the inner flow surface of the casing where the impeller blades reside in, over an inner circumference of the casing. Also, second grooves 25 in a circumferential direction are formed in an area on the inner flow surface of the casing where the impeller blades reside in, for communicating the first grooves in the circumferential direction of the casing.Type: GrantFiled: July 11, 2002Date of Patent: June 24, 2003Assignee: Hitachi, Ltd.Inventors: Kouichi Irie, Tomoyoshi Okamura, Akira Manabe, Junichi Kurokawa
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Patent number: 6540482Abstract: A turbo-type machine, comprising a casing 2 storing an impeller within an inside thereof, and a plural number of grooves formed on an inner surface of the casing in a direction of pressure gradient of fluid, wherein the grooves 124 are provided from 80 to 150 pieces around a periphery on the inner surface of the casing, and a total width of the grooves all around the inner surface of the casing is from 30% to 50% of a peripheral length on the inner surface of the casing. Also, the area on cross-section of the groove 124 within an area where the blades exist is made larger than that of the groove outside where the blades exist, or openings 127 are drilled on a bottom surface of the grooves, each penetrating through thickness of the casing, or the groove is made in a two-layer structure in the direction of pressure gradient of fluid.Type: GrantFiled: March 20, 2001Date of Patent: April 1, 2003Assignees: Hitachi, Ltd.Inventors: Kouichi Irie, Tomoyoshi Okamura, Sumio Sudo, Junichi Kurokawa
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Patent number: 6527509Abstract: A turbo machine comprising: an impeller having a plurality of blades therewith; a casing having a flow surface defined therein and being positioned with the impeller therein; and a plurality of grooves being formed in the flow surface of the casing, for connecting between an inlet side of said impeller and an area on the flow surface of the casing in which the blades of said impeller reside. Each groove has a length of at least part of which is oriented in an axial direction of the casing, a width measured in a circumferential direction, and a depth. The width of each groove is equal to or greater than the depth thereof.Type: GrantFiled: October 16, 2001Date of Patent: March 4, 2003Assignee: Hitachi, Ltd.Inventors: Junichi Kurokawa, Hitoharu Kimura, Tomoyshi Okamura, Takahide Nagahara, Sumio Sudo, Akira Manabe, Norimitsu Kuwabara
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Publication number: 20030031559Abstract: A turbo-type machine, comprising a casing 2 storing an impeller within an inside thereof, and a plural number of grooves formed on an inner surface of the casing in a direction of pressure gradient of fluid, wherein the grooves 124 are provided from 80 to 150 pieces around a periphery on the inner surface of the casing, and a total width of the grooves all around the inner surface of the casing is from 30% to 50% of a peripheral length on the inner surface of the casing. Also, the area on cross-section of the groove 124 within an area where the blades exist is made larger than that of the groove outside where the blades exist, or openings 127 are drilled on a bottom surface of the grooves, each penetrating through thickness of the casing, or the groove is made in a two-layer structure in the direction of pressure gradient of fluid.Type: ApplicationFiled: March 20, 2001Publication date: February 13, 2003Inventors: Kouichi Irie, Tomoyoshi Okamura, Sumio Sudo, Junichi Kurokawa
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Publication number: 20030002982Abstract: In an axial flow hydraulic machine, a plural number of grooves 5 are formed on an inner surface of a casing, directed into a pressure gradient direction, for connecting between an inlet side of an impeller 1 and an inside of blade residing region on the casing inner surface. With movement of movable members 6 provided on the casing inner surface, the grooves appear within the blade residing region in an unstable operation region, while the grooves cause no interference with the blades of the impeller in a stable operation region.Type: ApplicationFiled: June 27, 2002Publication date: January 2, 2003Inventors: Kouichi Irie, Tomoyoshi Okamura, Yoshio Anzai, Junichi Kurokawa
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Publication number: 20020182069Abstract: For improving characteristic uprising at the right-hand side of head-flow rate characteristic of a turbo machine, as well as for suppressing increase of vibration and/or noises thereof, a plurality of first grooves 24 in direction of gradient in pressure of fluid are formed on an inner flow surface of a casing, for connecting an inlet side of blades of an impeller and an area on the inner flow surface of the casing where the impeller blades reside in, over an inner circumference of the casing. Also, second grooves 25 in a circumferential direction are formed in an area on the inner flow surface of the casing where the impeller blades reside in, for communicating the first grooves in the circumferential direction of the casing.Type: ApplicationFiled: July 11, 2002Publication date: December 5, 2002Inventors: Kouichi Irie, Tomoyoshi Okamura, Akira Manabe, Junichi Kurokawa
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Patent number: 6435819Abstract: For improving characteristic uprising at the right-hand side of head-flow rate characteristic of a turbo machine, as well as for suppressing increase of vibration and/or noises thereof, a plurality of first grooves 24 in direction of gradient in pressure of fluid are formed on an inner flow surface of a casing, for connecting an inlet side of blades of an impeller and an area on the inner flow surface of the casing where the impeller blades reside in, over an inner circumference of the casing. Also, second grooves 25 in a circumferential direction are formed in an area on the inner flow surface of the casing where the impeller blades reside in, for communicating the first grooves in the circumferential direction of the casing.Type: GrantFiled: August 10, 2001Date of Patent: August 20, 2002Assignee: Hitachi, Ltd.Inventors: Kouichi Irie, Tomoyoshi Okamura, Akira Manabe, Junichi Kurokawa
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Patent number: D508893Type: GrantFiled: March 18, 2004Date of Patent: August 30, 2005Assignee: Shinko Electric Co., Ltd.Inventors: Kazumichi Kato, Toshio Miki, Hiroo Mike, Junichi Kurokawa
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Patent number: D509794Type: GrantFiled: March 18, 2004Date of Patent: September 20, 2005Assignee: Shinko Electric Co., Ltd.Inventors: Kazuo Okubo, Kazumichi Kato, Toshio Miki, Hiroo Mike, Junichi Kurokawa
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Patent number: D511323Type: GrantFiled: March 18, 2004Date of Patent: November 8, 2005Assignee: Shinko Electric Co., Ltd.Inventors: Kazumichi Kato, Toshio Miki, Hiroo Mike, Junichi Kurokawa
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Patent number: D511495Type: GrantFiled: March 18, 2004Date of Patent: November 15, 2005Assignee: Shinko Electric Co., Ltd.Inventors: Kazuo Okubo, Kazumichi Kato, Toshio Miki, Hiroo Mike, Junichi Kurokawa
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Patent number: D590340Type: GrantFiled: July 17, 2007Date of Patent: April 14, 2009Assignee: Shinko Electric Co., Ltd.Inventors: Fumio Sayama, Masami Morita, Hiroki Kataoka, Hiroaki Nishiono, Junichi Kurokawa, Tsuyoshi Muraoka
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Patent number: D641699Type: GrantFiled: July 17, 2007Date of Patent: July 19, 2011Assignee: Shinko Electric Co., Ltd.Inventors: Fumio Sayama, Masami Morita, Hiroki Kataoka, Hiroaki Nishiono, Junichi Kurokawa, Tsuyoshi Muraoka