Patents by Inventor Osami Fujiwara
Osami Fujiwara 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: 9976524Abstract: A work vehicle is provided with fuel supply lines that include a first fuel supply line that connects a first fuel tank and a junction. A second fuel supply line connects a second fuel tank and the junction. A common supply line connects the junction and a diesel engine. A fuel pump is provided on the common supply line. A first check valve is installed on the first fuel supply line and opens in accordance with a pressure differential between a pressure in the first fuel tank and a pressure in the junction. A second check valve is installed on the second fuel supply line and opens in accordance with a pressure differential between a pressure in the second fuel tank and a pressure in the junction. A fuel return line returns excess fuel from the diesel engine to the first fuel tank and the second fuel tank.Type: GrantFiled: March 17, 2015Date of Patent: May 22, 2018Assignee: KUBOTA CORPORATIONInventors: Masaki Takaoka, Seiya Yoshida, Junki Nakao, Hideki Aoki, Osami Fujiwara, Hiroyuki Tada
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Patent number: 9676270Abstract: A work vehicle having a hood for covering an engine room is disclosed. The engine room has a first region and a second region partitioned from each other, the engine room being configured such that air can be introduced from outside of the hood to the first region. A radiator is disposed in the first region, and air flows through the radiator from the first region to the second region. In the second region, the engine and an accessory unit for the engine are provided. The work vehicle includes an adjusting device for adjusting an amount of the air that flows from the first region to the second region.Type: GrantFiled: May 26, 2016Date of Patent: June 13, 2017Assignee: Kubota CorporationInventors: Hironori Tsuchihashi, Hideya Umemoto, Osami Fujiwara, Yoshikazu Togoshi, Yoshikazu Takemoto
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Publication number: 20170087976Abstract: A work vehicle having a hood for covering an engine room is disclosed. The engine room has a first region and a second region partitioned from each other, the engine room being configured such that air can be introduced from outside of the hood to the first region. A radiator is disposed in the first region, and air flows through the radiator from the first region to the second region. In the second region, the engine and an accessory unit for the engine are provided. The work vehicle includes an adjusting device for adjusting an amount of the air that flows from the first region to the second region.Type: ApplicationFiled: May 26, 2016Publication date: March 30, 2017Inventors: Hironori Tsuchihashi, Hideya Umemoto, Osami Fujiwara, Yoshikazu Togoshi, Yoshikazu Takemoto
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Patent number: 9596804Abstract: A riding mower is provided with a front frame, a rear frame on which a drive unit is mounted, a rollover protective structure (ROPS). A first coupling part couples one front frame and one rear frame. A second coupling part couples a rear end of the front frame and a supporting column of the ROPS. A third coupling part couples the supporting column and the rear frame. The riding mower utilizes at least one triangular structural element defined in part by the first, second and third coupling parts.Type: GrantFiled: March 6, 2015Date of Patent: March 21, 2017Assignee: KUBOTA CORPORATIONInventors: Masato Asahara, Hideya Umemoto, Osami Fujiwara, Hideki Aoki, Akira Minoura, Yoshikazu Togoshi
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Publication number: 20160069309Abstract: A work vehicle is provided with fuel supply lines that include a first fuel supply line that connects a first fuel tank and a junction. A second fuel supply line connects a second fuel tank and the junction. A common supply line connects the junction and a diesel engine. A fuel pump is provided on the common supply line. A first check valve is installed on the first fuel supply line and opens in accordance with a pressure differential between a pressure in the first fuel tank and a pressure in the junction. A second check valve is installed on the second fuel supply line and opens in accordance with a pressure differential between a pressure in the second fuel tank and a pressure in the junction. A fuel return line returns excess fuel from the diesel engine to the first fuel tank and the second fuel tank.Type: ApplicationFiled: March 17, 2015Publication date: March 10, 2016Applicant: KUBOTA CORPORATIONInventors: Masaki TAKAOKA, Seiya YOSHIDA, Junki NAKAO, Hideki AOKI, Osami FUJIWARA, Hiroyuki TADA
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Publication number: 20160057924Abstract: A riding mower is provided with a front frame, a rear frame on which a drive unit is mounted, a rollover protective structure (ROPS). A first coupling part couples one front frame and one rear frame. A second coupling part couples a rear end of the front frame and a supporting column of the ROPS. A third coupling part couples the supporting column and the rear frame. The riding mower utilizes at least one triangular structural element defined in part by the first, second and third coupling parts.Type: ApplicationFiled: March 6, 2015Publication date: March 3, 2016Applicant: KUBOTA CORPORATIONInventors: Masato ASAHARA, Hideya UMEMOTO, Osami FUJIWARA, Hideki AOKI, Akira MINOURA, Yoshikazu TOGOSHI
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Patent number: 9045171Abstract: A work vehicle includes a fixed hood covering a rear area of an engine compartment housing an engine and an engine accessory, a swing axis extending through the rear area of the engine compartment in a transverse direction of the vehicle, and a swing hood swinging around the swing axis between a closed position and an open position. The swing hood tucks the fixed hood inside the swing hood and thus covers the fixed hood in the open position, and covers a front area and a middle area of the engine compartment and overlaps with a front end portion of the fixed hood in the closed position.Type: GrantFiled: March 1, 2013Date of Patent: June 2, 2015Assignee: KUBOTA CORPORATIONInventors: Kazuaki Nogami, Hiroyuki Tada, Yoshiyuki Esaki, Kazutomo Miyaguchi, Eiji Sato, Akira Minoura, Hironori Tsuchihashi, Osami Fujiwara, Seiya Yoshida
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Patent number: 8991143Abstract: A work vehicle includes wheels and a mower unit that are driven by power from an engine, and a mower driving detecting section for detecting power transmission condition to the mower unit. An isochronous controlling section controls the engine in an isochronous control mode for maintaining an engine rotational speed at a predetermined fixed value, independently of an engine load. A droop controlling section controls the engine in a droop control mode for varying the engine rotational speed in dependence on the engine load. If power is transmitted to the mower unit, the isochronous control mode is selected.Type: GrantFiled: February 25, 2013Date of Patent: March 31, 2015Assignee: Kubota CorporationInventors: Osami Fujiwara, Hironori Tsuchihashi, Kazutomo Miyaguchi, Kazunari Tsujino, Yoshikazu Takemoto
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Publication number: 20140059990Abstract: A work vehicle includes wheels and a mower unit that are driven by power from an engine, and a mower driving detecting section for detecting power transmission condition to the mower unit. An isochronous controlling section controls the engine in an isochronous control mode for maintaining an engine rotational speed at a predetermined fixed value, independently of an engine load. A droop controlling section controls the engine in a droop control mode for varying the engine rotational speed in dependence on the engine load. If power is transmitted to the mower unit, the isochronous control mode is selected.Type: ApplicationFiled: February 25, 2013Publication date: March 6, 2014Applicant: KUBOTA CORPORATIONInventors: Osami Fujiwara, Hironori Tsuchihashi, Kazutomo Miyaguchi, Kazunari Tsujino, Yoshikazu Takemoto
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Publication number: 20140014429Abstract: A work vehicle includes a fixed hood covering a rear area of an engine compartment housing an engine and an engine accessory, a swing axis extending through the rear area of the engine compartment in a transverse direction of the vehicle, and a swing hood swinging around the swing axis between a closed position and an open position. The swing hood tucks the fixed hood inside the swing hood and thus covers the fixed hood in the open position, and covers a front area and a middle area of the engine compartment and overlaps with a front end portion of the fixed hood in the closed position.Type: ApplicationFiled: March 1, 2013Publication date: January 16, 2014Applicant: KUBOTA CORPORATIONInventors: Kazuaki NOGAMI, Hiroyuki TADA, Yoshiyuki ESAKI, Kazutomo MIYAGUCHI, Eiji SATO, Akira MINOURA, Hironori TSUCHIHASHI, Osami FUJIWARA, Seiya YOSHIDA
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Patent number: 8156722Abstract: Disclosed is a mower with a mower deck, a plurality of cutting chambers mutually communicated and arranged in a lateral direction within the mower deck, and a blade mounted in each cutting chamber to be rotatable about a vertical axis. A grass clippings guide in form of a vertical wall is disposed in an upper area within the cutting chamber, to guide the grass clippings flowing within the cutting chamber toward a center of rotation of the blade. A shield member is disposed for preventing entry of grass clippings between the grass clippings guide and a peripheral wall of the cutting chamber.Type: GrantFiled: October 1, 2008Date of Patent: April 17, 2012Assignee: Kubota CorporationInventors: Akihito Sugio, Kazuo Sameshiima, Akira Minoura, Masatake Murakawa, Masatoshi Yamaguchi, Kazuo Koike, Masato Asahara, Yoshikazu Togoshi, Osami Fujiwara, Koji Fujiwara
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Patent number: 8117813Abstract: A riding type grass mower includes a right wheel and a left wheel, a rear-discharge type mower unit disposed forwardly of the right/left wheels, a driver's seat disposed between and upwardly of the right/left wheels, an engine mounted rearwardly of the driver's seat, an engine hood for covering the engine, and a restricting unit disposed rearwardly of the driver's seat and at an area downwardly of the engine hood, the restricting unit having a restricting face (including a mesh face) configured to restrict upward rising of cut grass discharged from the mower unit.Type: GrantFiled: August 31, 2010Date of Patent: February 21, 2012Assignee: Kubota CorporationInventors: Akihito Sugio, Osami Fujiwara, Yusuke Shoji, Yoshihiro Ueda
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Publication number: 20110131942Abstract: A riding type grass mower includes a right wheel and a left wheel, a rear-discharge type mower unit disposed forwardly of the right/left wheels, a driver's seat disposed between and upwardly of the right/left wheels, an engine mounted rearwardly of the driver's seat, an engine hood for covering the engine, and a restricting unit disposed rearwardly of the driver's seat and at an area downwardly of the engine hood, the restricting unit having a restricting face (including a mesh face) configured to restrict upward rising of cut grass discharged from the mower unit.Type: ApplicationFiled: August 31, 2010Publication date: June 9, 2011Applicant: KUBOTA CORPORATIONInventors: Akihito Sugio, Osami Fujiwara, Yusuke Shoji, Yoshihiro Ueda
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Patent number: 7866426Abstract: A riding type mower comprises: a plurality of wheels; a vehicle body supported by the plurality of wheels; a water-cooled engine located in a rear region of the vehicle body; a hood for covering the engine; a driver's seat located forwardly of the hood; a rollover protection frame located between the driver's seat and the water-cooled engine, the rollover protection frame having a pair of right and left support columns spaced apart from each other in a lateral direction; a radiator for the water-cooled engine located between the pair of the support columns of the rollover protection frame.Type: GrantFiled: September 1, 2006Date of Patent: January 11, 2011Assignee: Kubota CorporationInventors: Hideya Umemoto, Akira Minoura, Osami Fujiwara, Kazuaki Nogami, Takeshi Komorida
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Patent number: 7594378Abstract: A mower tractor includes a vehicle body supported by a plurality of wheels; an engine mounted to the vehicle body; a mower suspended from the vehicle body; at least one grass collector bag for collecting grass cut by the mower; a grass collector bag holder supporting said at least one grass collector bag at a position on one side with respect to the engine; and a stopper portion for abutting against the grass collector bag so as to prevent the grass collector bag supported by the grass collector bag holder from moving toward the vehicle body.Type: GrantFiled: March 9, 2005Date of Patent: September 29, 2009Assignee: Kubota CorporationInventors: Masato Asahara, Kazuo Samejima, Yoshikazu Togoshi, Akira Minoura, Yasunobu Nakatani, Osami Fujiwara
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Publication number: 20090178382Abstract: Disclosed is a mower with a mower deck, a plurality of cutting chambers mutually communicated and arranged in a lateral direction within the mower deck, and a blade mounted in each cutting chamber to be rotatable about a vertical axis. A grass clippings guide in form of a vertical wall is disposed in an upper area within the cutting chamber, to guide the grass clippings flowing within the cutting chamber toward a center of rotation of the blade. A shield member is disposed for preventing entry of grass clippings between the grass clippings guide and a peripheral wall of the cutting chamber.Type: ApplicationFiled: October 1, 2008Publication date: July 16, 2009Applicant: KUBOTA CORPORATIONInventors: Akihito Sugio, Kazuo Sameshiima, Akira Minoura, Masatake Murakawa, Masatoshi Yamaguchi, Kazuo Koike, Masato Asahara, Yoshikazu Togoshi, Osami Fujiwara, Koji Fujiwara
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Publication number: 20070169455Abstract: A riding type mower comprises: a plurality of wheels; a vehicle body supported by the plurality of wheels; a water-cooled engine located in a rear region of the vehicle body; a hood for covering the engine; a driver's seat located forwardly of the hood; a rollover protection frame located between the driver's seat and the water-cooled engine, the rollover protection frame having a pair of right and left support columns spaced apart from each other in a lateral direction; a radiator for the water-cooled engine located between the pair of the support columns of the rollover protection frame.Type: ApplicationFiled: September 1, 2006Publication date: July 26, 2007Applicant: Kubota CorporationInventors: Hideya Umemoto, Akira Minoura, Osami Fujiwara, Kazuaki Nogami, Takeshi Komorida
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Patent number: 7059109Abstract: A mid-mount mower having a front frame unit including a pair of right and left front longitudinal frames, a first cross frame interconnecting the front longitudinal frames in forward positions thereof longitudinally of the vehicle body, and a second cross frame interconnecting the front longitudinal frames in rearward positions thereof longitudinally of the vehicle body, the front frame unit supporting the front wheel unit and also supporting a lift mechanism for vertically movably suspending the mower unit; a rear frame unit including a pair of right and left rear longitudinal frames, the rear frame unit being connected to the front frame unit; and a rear wheel drive unit interconnecting the rear longitudinal frames. The second cross frame has a downwardly opening recess disposed adjacent a middle position thereof, the recess allowing entry thereto of an upwardly protruding portion of the mower unit without interference when the mower unit is raised by the lift mechanism.Type: GrantFiled: August 26, 2003Date of Patent: June 13, 2006Assignee: Kubota CorporationInventors: Kazuo Samejima, Masato Asahara, Hiroshi Shimada, Akira Minoura, Yoshikazu Togoshi, Osami Fujiwara, Yoshiyuki Esaki
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Patent number: 6997280Abstract: A working vehicle propelled by independently driven right and left running units comprising a body frame with an engine mounted thereon; a front wheel unit for supporting the body frame in cooperation with the right and left running units; a left HST for receiving torque input from the engine; a right HST for receiving torque input from the engine; a left reduction mechanism for decelerating and transmitting torque output from the left HST to the left running unit; a right reduction mechanism for decelerating and transmitting torque output from the right HST to the right running unit; a left base block supported by the body frame, this base block forming a housing base for the left HST and a housing base for the left reduction mechanism; a right base block attached to the body frame, this base block forming a housing base for the right HST and a housing base for the right reduction mechanism. The base blocks are formed as port blocks for the HSTs, and define hydraulic ports in the housing bases for the HSTs.Type: GrantFiled: August 26, 2003Date of Patent: February 14, 2006Assignee: Kubota CorporationInventors: Akira Minoura, Teruo Shimamura, Masahiro Yamada, Yoshikazu Togoshi, Hironori Tsuchihashi, Osami Fujiwara, Yoshiyuki Esaki
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Patent number: 6973768Abstract: A mid-mount mower having a body frame supported above the ground by front wheels and rear wheels, the body frame having a front cross frame in a forward portion thereof with respect to a longitudinal direction of a vehicle body, and a mower unit disposed between the front wheels and rear wheels. A main jack body is mounted on the front cross frame to be pivotable about a pivot shaft extending longitudinally of the vehicle body. The main jack body is in a storage position extending along the front cross frame when pivoted to a first pivot position about the pivot shaft, and in a substantially vertical position relative to the ground when pivoted to a second pivot position about the pivot shaft. The main jack body has a controlled portion exposed upward when the main jack body is in the vertical position.Type: GrantFiled: August 26, 2003Date of Patent: December 13, 2005Assignee: Kubota CorporationInventors: Kazuo Samejima, Yoshikazu Togoshi, Osami Fujiwara, Yoshiyuki Esaki, Akira Minoura