Patents by Inventor Ryoichi Nishi
Ryoichi Nishi 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: 11505911Abstract: A work-tool mounting mechanism detachably attaches a predetermined work tool that includes an engaged portion including an engagement hole. The mechanism includes: an engaging portion that engages the engaged portion and includes; a lever that is rotatably attached to the engaging portion; a lock pin that is movable between a locked position and an unlocked position, the lock pin being inserted into the engagement hole in the locked position, and not inserted into the engagement hole in the unlocked position; and a linking tool that moves the lock pin between the locked position and the unlocked position with a rotation of the lever. The linking tool includes a regulating portion that regulates the lock pin at the locked position from moving to the unlocked position.Type: GrantFiled: March 12, 2020Date of Patent: November 22, 2022Assignee: Kubota CorporationInventor: Ryoichi Nishi
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Publication number: 20200325648Abstract: A work-tool mounting mechanism detachably attaches a predetermined work tool that includes an engaged portion including an engagement hole. The mechanism includes: an engaging portion that engages the engaged portion and includes; a lever that is rotatably attached to the engaging portion; a lock pin that is movable between a locked position and an unlocked position, the lock pin being inserted into the engagement hole in the locked position, and not inserted into the engagement hole in the unlocked position; and a linking tool that moves the lock pin between the locked position and the unlocked position with a rotation of the lever. The linking tool includes a regulating portion that regulates the lock pin at the locked position from moving to the unlocked position.Type: ApplicationFiled: March 12, 2020Publication date: October 15, 2020Applicant: Kubota CorporationInventor: Ryoichi Nishi
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Patent number: 9039343Abstract: A front loader is provided with an indicator device. The indicator device is configured to indicate that the work implement is in an identical posture irrespective of a height position of the work implement, by aligning a rear end of the indicator rod with a rear end of the guide tube.Type: GrantFiled: February 25, 2013Date of Patent: May 26, 2015Assignee: Kubota CorporationInventors: Ryoichi Nishi, Koji Saito, Kosuke Oyama, Kenzo Ushiro, Takahiro Yonekura
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Patent number: 8974172Abstract: A boom has a central connection plate attached between a pair of side plates, and a rear portion side of a cover plate on a front boom portion and a front portion side of a cover plate on a rear boom portion are connected thereby. A pivoting support for a working tool cylinder used to move a working tool connected to a foremost portion of the front boom portion is provided on a front side of a top portion on each of the left and right side plates. The central connection plate is formed with a connection plate projection projecting from a front portion attached to the rear portion of the cover plate toward a midway portion so as to approach the pivoting support.Type: GrantFiled: March 14, 2012Date of Patent: March 10, 2015Assignee: Kubota CorporationInventor: Ryoichi Nishi
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Publication number: 20140064898Abstract: Disclosed is a front loader provided with an indicator device. The indicator device is configured to indicate that the work implement is in an identical posture irrespective of a height position of the work implement, by aligning a rear end of the indicator rod with a rear end of the guide tube.Type: ApplicationFiled: February 25, 2013Publication date: March 6, 2014Applicant: KUBOTA CORPORATIONInventors: Ryoichi Nishi, Koji Saito, Kosuke Oyama, Kenzo Ushiro, Takahiro Yonekura
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Publication number: 20130017049Abstract: A boom has a central connection plate attached between a pair of side plates, and a rear portion side of a cover plate on a front boom portion and a front portion side of a cover plate on a rear boom portion are connected thereby. A pivoting support for a working tool cylinder used to move a working tool connected to a foremost portion of the front boom portion is provided on a front side of a top portion on each of the left and right side plates. The central connection plate is formed with a connection plate projection projecting from a front portion attached to the rear portion of the cover plate toward a midway portion so as to approach the pivoting support.Type: ApplicationFiled: March 14, 2012Publication date: January 17, 2013Applicant: KUBOTA CORPORATIONInventor: Ryoichi NISHI
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Patent number: 7766597Abstract: The invention provides a loader work machine with improved front visibility and improved aesthetic appearance. The loader work machine includes a self-propelled machine body, a work device having a boom, a boom cylinder, and a side frame for vertically pivotally supporting base portions of the boom and the boom cylinder, and a frame unit for attaching the work device to the self-propelled machine body. The frame unit has a support platform projecting laterally outward from the self-propelled machine body and a main frame mounted erect on the support platform for supporting and connecting a lower portion of the side frame. An accumulator is connected to the boom cylinder for absorbing shock occurring during a vertical pivotal movement of the work device and this accumulator is attached to the frame unit.Type: GrantFiled: March 14, 2006Date of Patent: August 3, 2010Assignee: Kubota CorporationInventors: Tomiho Tanaka, Arinobu Ishida, Kosuke Oyama, Ryoichi Nishi, Shusaku Yamaguchi, Naoya Tsuda, Masataka Takagi
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Patent number: 7520713Abstract: There is provided a boom assembly bent at the center in a longitudinal direction so as to form a round shape protruding upward when seen from the side, comprising; a front boom sub assembly (47), the front boom sub assembly constituting the front of the center in the longitudinal direction of said boom assembly; and a rear boom sub assembly (48), the rear boom sub assembly constituting the rear of the center in the longitudinal direction of the boom assembly, wherein the front boom sub assembly (47) and the rear boom sub assembly (48) are symmetric when seen from the side, and portions from the midway positions in the longitudinal direction of the front boom sub assembly (47) and the rear boom sub assembly (48) to the center in the longitudinal direction of the boom assembly (12) have upper surfaces of arc shape protruding upward when seen from the side, and portions from the middles in the longitudinal direction of the front boom sub assembly (47) and the rear boom sub assembly (48) to ends in the longitudinType: GrantFiled: September 11, 2006Date of Patent: April 21, 2009Assignee: Kubota CorporationInventors: Ryoichi Nishi, Naoki Onishi, Arinobu Ishida, Shusaku Yamaguchi, Kosuke Oyama
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Patent number: 7442001Abstract: A boom assembly is bent at a longitudinal center portion thereof to present an upwardly convex shape. The assembly includes a front boom body and a rear boom body. The front boom body and the rear main body each includes a main body consisting essentially of a pair of right and left lateral plates and a top plate interconnecting upper edges of the respective lateral plates. The main body is formed with an upper face and a lower edge thereof being bent in a longitudinal direction thereof into an arc face having a predetermined radius of curvature. The front or rear main body further includes a bottom plate disposed downwardly of the top plate and between the right and left lateral plates. Each main body is formed by bending a plate member into a reverse U-shaped cross section and each bottom plate is comprised of a plate member provided separately from the plate member forming the main body.Type: GrantFiled: September 13, 2005Date of Patent: October 28, 2008Assignee: Kubota CorporationInventors: Yoshitaka Higashikawa, Naoki Onishi, Ryoichi Nishi, Hiroki Fukudome
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Patent number: 7438517Abstract: A loader control device for controlling a loader implement attached to a tractor is disposed in a position adjacent a driver's seat and does not obstruct the driver boarding or alighting from the tractor. For this purpose, the tractor includes a vehicle body; a loader implement detachably attached to a front part of the vehicle body; a driver's seat mounted on the vehicle body; a steering device disposed forwardly of the driver's seat; a step laid between the driver's seat and the steering device; rear wheel fenders at opposite lateral positions of the driver's seat; and a shifting unit disposed between the driver's seat and one of the rear wheel fenders; wherein a mounting unit for mounting a loader control device for controlling the loader implement is provided in a forward position of an upper surface of the one of the rear wheel fenders.Type: GrantFiled: April 4, 2006Date of Patent: October 21, 2008Assignee: Kubota CorporationInventors: Tomiho Tanaka, Ryoichi Nishi, Akiyoshi Uchijima, Naoki Onishi, Masataka Takagi, Naoya Tsuda, Kosuke Oyama, Arinobu Ishida, Shusaku Yamaguchi
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Patent number: 7431553Abstract: A loader work machine including a vehicle body, and a working implement having booms and boom cylinders and mounting frame units for attaching the working implement to a front portion of the vehicle body. Each of the mounting frame units includes a mounting plate fixed to the vehicle body, a support base projecting laterally outward from the mounting plate, a main frame erected on the support base, and a side frame for pivotally supporting proximal ends of one of the booms and one of the boom cylinders. The side frame includes right and left side plates and a connecting element for interconnecting the right and left side plates. The side frame is detachably attached to the main frame by engaging an engaging member disposed in a lower portion of the side frame with an engageable member of the main frame, and connecting a connecting member formed on the side frame to a connectable member formed on the main frame. The main frame is formed as a one-piece plate insertable between the right and left side plates.Type: GrantFiled: September 19, 2005Date of Patent: October 7, 2008Assignee: Kubota CorporationInventors: Ryoichi Nishi, Shusaku Yamaguchi, Arinobu Ishida, Kosuke Oyama
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Publication number: 20070224027Abstract: There is provided a boom assembly bent at the center in a longitudinal direction so as to form a round shape protruding upward when seen from the side, comprising; a front boom sub assembly (47), the front boom sub assembly constituting the front of the center in the longitudinal direction of said boom assembly; and a rear boom sub assembly (48), the rear boom sub assembly constituting the rear of the center in the longitudinal direction of the boom assembly, wherein the front boom sub assembly (47) and the rear boom sub assembly (48) are symmetric when seen from the side, and portions from the midway positions in the longitudinal direction of the front boom sub assembly (47) and the rear boom sub assembly (48) to the center in the longitudinal direction of the boom assembly (12) have upper surfaces of arc shape protruding upward when seen from the side, and portions from the middles in the longitudinal direction of the front boom sub assembly (47) and the rear boom sub assembly (48) to ends in the longitudinType: ApplicationFiled: September 11, 2006Publication date: September 27, 2007Applicant: Kubota CorporationInventors: Ryoichi Nishi, Naoki Onishi, Arinobu Ishida, Shusaku Yamaguchi, Kosuke Oyama
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Publication number: 20070020068Abstract: A loader control device for controlling a loader implement attached to a tractor is disposed in a position adjacent a driver's seat and does not obstruct the driver boarding or alighting from the tractor. For this purpose, the tractor includes a vehicle body; a loader implement detachably attached to a front part of the vehicle body; a driver's seat mounted on the vehicle body; a steering device disposed forwardly of the driver's seat; a step laid between the driver's seat and the steering device; rear wheel fenders at opposite lateral positions of the driver's seat; and a shifting unit disposed between the driver's seat and one of the rear wheel fenders; wherein a mounting unit for mounting a loader control device for controlling the loader implement is provided in a forward position of an upper surface of the one of the rear wheel fenders.Type: ApplicationFiled: April 4, 2006Publication date: January 25, 2007Applicant: Kubota CorporationInventors: Tomiho Tanaka, Ryoichi Nishi, Akiyoshi Uchijima, Naoki Onishi, Masataka Takagi, Naoya Tsuda, Kosuke Oyama, Arinobu Ishida, Shusaku Yamaguchi
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Publication number: 20070003401Abstract: The invention provides a loader work machine with improved front visibility and improved aesthetic appearance. The loader work machine includes a self-propelled machine body, a work device having a boom, a boom cylinder, and a side frame for vertically pivotally supporting base portions of the boom and the boom cylinder, and a frame unit for attaching the work device to the self-propelled machine body. The frame unit has a support platform projecting laterally outward from the self-propelled machine body and a main frame mounted erect on the support platform for supporting and connecting a lower portion of the side frame. An accumulator is connected to the boom cylinder for absorbing shock occurring during a vertical pivotal movement of the work device and this accumulator is attached to the frame unit.Type: ApplicationFiled: March 14, 2006Publication date: January 4, 2007Applicant: Kubota CorporationInventors: Tomiho Tanaka, Arinobu Ishida, Kosuke Oyama, Ryoichi Nishi, Shusaku Yamaguchi, Naoya Tsuda, Masataka Takagi
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Publication number: 20060245900Abstract: A loader work machine including a vehicle body, and a working implement having booms and boom cylinders and mounting frame units for attaching the working implement to a front portion of the vehicle body. Each of the mounting frame units includes a mounting plate fixed to the vehicle body, a support base projecting laterally outward from the mounting plate, a main frame erected on the support base, and a side frame for pivotally supporting proximal ends of one of the booms and one of the boom cylinders. The side frame includes right and left side plates and a connecting element for interconnecting the right and left side plates. The side frame is detachably attached to the main frame by engaging an engaging member disposed in a lower portion of the side frame with an engageable member of the main frame, and connecting a connecting member formed on the side frame to a connectable member formed on the main frame. The main frame is formed as a one-piece plate insertable between the right and left side plates.Type: ApplicationFiled: September 19, 2005Publication date: November 2, 2006Applicant: Kubota CorporationInventors: Ryoichi Nishi, Shusaku Yamaguchi, Arinobu Ishida, Kosuke Oyama
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Publication number: 20060182597Abstract: A boom assembly is bent at a longitudinal center portion thereof to present an upwardly convex shape. The assembly includes a front boom body and a rear boom body. The front boom body and the rear main body each includes a main body consisting essentially of a pair of right and left lateral plates and a top plate interconnecting upper edges of the respective lateral plates. The main body is formed with an upper face and a lower edge thereof being bent in a longitudinal direction thereof into an arc face having a predetermined radius of curvature. The front or rear main body further includes a bottom plate disposed downwardly of the top plate and between the right and left lateral plates. Each main body is formed by bending a plate member into a reverse U-shaped cross section and each bottom plate is comprised of a plate member provided separately from the plate member forming the main body.Type: ApplicationFiled: September 13, 2005Publication date: August 17, 2006Applicant: Kubota CorporationInventors: Yoshitaka Higashikawa, Naoki Onishi, Ryoichi Nishi, Hiroki Fukudome
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Patent number: 6711839Abstract: A tractor includes a tractor body (2), a driver's seat disposed on the tractor body, a working implement attached to a rear end of the tractor body, a tractor control station disposed forwardly of the driver's seat, an implement control station disposed rearwardly of the driver's seat, and a position switching mechanism for switching the driver's seat between a forward facing position for allowing a driver seated on the driver's seat to operate the tractor control station, and a rearward facing position for allowing the driver to operate the implement control station. A passage (52) is disposed on the tractor body (2) for allowing the driver to move past the driver's seat (8) between the tractor control station (43) and the implement control station (33).Type: GrantFiled: August 25, 2000Date of Patent: March 30, 2004Assignee: Kubota CorporationInventors: Shoichiro Kawamura, Ryoichi Nishi
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Patent number: D1024861Type: GrantFiled: November 23, 2021Date of Patent: April 30, 2024Assignee: KUBOTA CORPORATIONInventors: Taiki Furuki, Ryoichi Nishi, Keiichi Higashino