Patents by Inventor Katsuhiko Yukawa
Katsuhiko Yukawa 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: 10066366Abstract: A work machine includes: an operator seat; an operation device having an operation lever; a working device to be operated via the operation lever; and a support mechanism to support the operation device selectively at a first position or a second position, the first position being on a side of the operator seat, the second position being located forward with respect to the operator seat.Type: GrantFiled: April 15, 2016Date of Patent: September 4, 2018Assignee: KUBOTA CORPORATIONInventor: Katsuhiko Yukawa
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Publication number: 20160305092Abstract: A work machine includes: an operator seat; an operation device having an operation lever; a working device to be operated via the operation lever; and a support mechanism to support the operation device selectively at a first position or a second position, the first position being on a side of the operator seat, the second position being located forward with respect to the operator seat.Type: ApplicationFiled: April 15, 2016Publication date: October 20, 2016Applicant: KUBOTA CORPORATIONInventor: Katsuhiko YUKAWA
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Patent number: 8528681Abstract: A bonnet sealing structure for a swiveling work machine includes: a bonnet configured to cover an engine provided on a swivel stage including: a fixed cover, and an open-close cover which is swingably supported about a vertical shaft and is openable and closable relative to the fixed cover; a sealing member through which an upper end portion of the open-close cover is brought into contact with an upper end portion of the fixed cover when the open-close cover is closed; and a cover piece protruding from one of an upper wall of the open-close cover and an upper wall of the fixed cover, wherein when the open-close cover is closed, the cover piece is located above the sealing member and reaches a point above the other of the upper wall of the fixed cover and the upper wall of the open-close cover.Type: GrantFiled: September 17, 2009Date of Patent: September 10, 2013Assignee: Kubota CorporationInventors: Junichi Fujiwara, Katsuhiko Yukawa
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Publication number: 20100122862Abstract: A bonnet sealing structure for a swiveling work machine includes: a bonnet configured to cover an engine provided on a swivel stage including: a fixed cover, and an open-close cover which is swingably supported about a vertical shaft and is openable and closable relative to the fixed cover; a sealing member through which an upper end portion of the open-close cover is brought into contact with an upper end portion of the fixed cover when the open-close cover is closed; and a cover piece protruding from one of an upper wall of the open-close cover and an upper wall of the fixed cover, wherein when the open-close cover is closed, the cover piece is located above the sealing member and reaches a point above the other of the upper wall of the fixed cover and the upper wall of the open-close cover.Type: ApplicationFiled: September 17, 2009Publication date: May 20, 2010Applicant: KUBOTA CORPORATIONInventors: Junichi Fujiwara, Katsuhiko Yukawa
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Patent number: 6886277Abstract: A small swivel type working vehicle includes a running device (4), a swivel base (2) mounted on the running device (4) to be swivelable about a vertical swivel axis (X), a driver's seat (5) mounted on the swivel base (2), a control box (6) mounted upright on a top surface of the swivel base (2) forwardly of the driver's seat (5), a swing bracket (18) supported to be swingable about a vertical pivotal axis (19a) by a flange unit (17) provided at a front end of the swivel base (2), a boom (20) attached to the swing bracket to be swingable about a horizontal shaft (22), and a boom cylinder (21) connected at one end thereof to the swing bracket (18) and at the other end to the boom (20) for swinging the boom (20). The boom cylinder (21) is disposed outside the boom (20) to extend along a rear surface thereof. A walk-through space (100) is defined between the control box (6) and the driver's seat (5).Type: GrantFiled: August 28, 2002Date of Patent: May 3, 2005Assignee: Kubota CorporationInventors: Katsuhiko Yukawa, Takafumi Wada, Masanori Shintani, Junichi Fujiwara
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Patent number: 6872043Abstract: A swivel type working vehicle includes a running device (30), a swivel base (32) mounted on the running device to be swivelable about a vertical swivel axis (31), a swing bracket (5) supported to be swingable about a vertical axis by a flange unit (4) disposed at a front end of the swivel base, a boom (2) having a proximal end (2B) thereof attached to the swing bracket to be swingable about a horizontal axis (6), a boom cylinder (3) having one end thereof connected to the swing bracket and the other end to the boom for swinging the boom, a hydraulic pressure takeoff device (10) disposed in a distal end region (2C) of the boom, and hydraulic pressure takeoff pipes (12A, 12B) for supplying hydraulic pressure to the hydraulic pressure takeoff device (10). The boom (2) is a hollow box having a front wall (17), a left wall (16A), a right wall (16B) and a rear wall (14) extending longitudinally of the boom. The boom cylinder (3) is disposed outside the boom to extend along the rear wall of the boom.Type: GrantFiled: August 28, 2002Date of Patent: March 29, 2005Assignee: Kubota CorporationInventors: Katsuhiko Yukawa, Junichi Fujiwara
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Publication number: 20030210972Abstract: A swivel type working vehicle includes a running device (30), a swivel base (32) mounted on the running device to be swivelable about a vertical swivel axis (31), a swing bracket (5) supported to be swingable about a vertical axis by a flange unit (4) disposed at a front end of the swivel base, a boom (2) having a proximal end (2B) thereof attached to the swing bracket to be swingable about a horizontal axis (6), a boom cylinder (3) having one end thereof connected to the swing bracket and the other end to the boom for swinging the boom, a hydraulic pressure takeoff device (10) disposed in a distal end region (2C) of the boom, and hydraulic pressure takeoff pipes (12A, 12B) for supplying hydraulic pressure to the hydraulic pressure takeoff device (10). The boom (2) is a hollow box having a front wall (17), a left wall (16A), a right wall (16B) and a rear wall (14) extending longitudinally of the boom. The boom cylinder (3) is disposed outside the boom to extend along the rear wall of the boom.Type: ApplicationFiled: August 28, 2002Publication date: November 13, 2003Applicant: KUBOTA CORPORATIONInventors: Katsuhiko Yukawa, Junichi Fujiwara
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Publication number: 20030154635Abstract: A small swivel type working vehicle includes a running device (4), a swivel base (2) mounted on the running device (4) to be swivelable about a vertical swivel axis (X), a driver's seat (5) mounted on the swivel base (2), a control box (6) mounted upright on a top surface of the swivel base (2) forwardly of the driver's seat (5), a swing bracket (18) supported to be swingable about a vertical pivotal axis (19a) by a flange unit (17) provided at a front end of the swivel base (2), a boom (20) attached to the swing bracket to be swingable about a horizontal shaft (22), and a boom cylinder (21) connected at one end thereof to the swing bracket (18) and at the other end to the boom (20) for swinging the boom (20). The boom cylinder (21) is disposed outside the boom (20) to extend along a rear surface thereof. A walk-through space (100) is defined between the control box (6) and the driver's seat (5).Type: ApplicationFiled: August 28, 2002Publication date: August 21, 2003Applicant: KUBOTA CORPORATIONInventors: Katsuhiko Yukawa, Takafumi Wada, Masanori Shintani, Junichi Fujiwara
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Patent number: D812646Type: GrantFiled: September 15, 2015Date of Patent: March 13, 2018Assignee: Kubota CorporationInventors: Ryo Hashimoto, Taiki Furuki, Katsuhiko Yukawa
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Patent number: D821450Type: GrantFiled: September 15, 2015Date of Patent: June 26, 2018Assignee: KUBOTA CORPORATIONInventors: Ryo Hashimoto, Taiki Furuki, Katsuhiko Yukawa