Patents by Inventor Susumu Akashima
Susumu Akashima 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: 7484579Abstract: A crawler tractor comprises steering mechanisms (44) (45) for rotating a machine body by causing right and left crawler belts (9) to move differentially. The tractor is characterized in that the steering mechanism (44) is connected to a drive system located behind a reverser mechanism (21) that moves the machine body forward and back. Even when the machine body movement direction is changed from forward to back, the direction of the steering wheel (18) and the direction of the rotation of the machine body are kept the same, so that a reversed steering phenomenon is prevented from occurring, and an appropriate operation in forward or back movement is enabled with a simple structure that does not require an additional mechanism such as a reverse-steering preventions mechanism.Type: GrantFiled: January 7, 2008Date of Patent: February 3, 2009Assignee: Yanmar Agricultural Equipment Co., Ltd.Inventors: Susumu Akashima, Masakazu Komatsu
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Publication number: 20080185211Abstract: A crawler tractor comprises steering mechanisms (44) (45) for rotating a machine body by causing right and left crawler belts (9) to move differentially. The tractor is characterized in that the steering mechanism (44) is connected to a drive system located behind a reverser mechanism (21) that moves the machine body forward and back. Even when the machine body movement direction is changed from forward to back, the direction of the steering wheel (18) and the direction of the rotation of the machine body are kept the same, so that a reversed steering phenomenon is prevented from occurring, and an appropriate operation in forward or back movement is enabled with a simple structure that does not require an additional mechanism such as a reverse-steering preventions mechanism.Type: ApplicationFiled: January 7, 2008Publication date: August 7, 2008Applicant: Yanmar Agricultural Equipment Co., Ltd.Inventors: Susumu Akashima, Masakazu Komatsu
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Patent number: 7392867Abstract: A crawler tractor comprises steering mechanisms (44) (45) for rotating a machine body by causing right and left crawler belts (9) to move differentially. The tractor is characterized in that the steering mechanism (44) is connected to a drive system located behind a reverser mechanism (21) that moves the machine body forward and back. Even when the machine body movement direction is changed from forward to back, the direction of the steering wheel (18) and the direction of the rotation of the machine body are kept the same, so that a reversed steering phenomenon is prevented from occurring, and an appropriate operation in forward or back movement is enabled with a simple structure that does not require an additional mechanism such as a reverse-steering preventions mechanism.Type: GrantFiled: December 5, 2002Date of Patent: July 1, 2008Assignee: Yanmar Agricultural Equipment Co., Ltd.Inventors: Susumu Akashima, Masakazu Komatsu
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Publication number: 20060048977Abstract: A crawler tractor comprises steering mechanisms (44) (45) for rotating a machine body by causing right and left crawler belts (9) to move differentially. The tractor is characterized in that the steering mechanism (44) is connected to a drive system located behind a reverser mechanism (21) that moves the machine body forward and back. Even when the machine body movement direction is changed from forward to back, the direction of the steering wheel (18) and the direction of the rotation of the machine body are kept the same, so that a reversed steering phenomenon is prevented from occurring, and an appropriate operation in forward or back movement is enabled with a simple structure that does not require an additional mechanism such as a reverse-steering preventions mechanism.Type: ApplicationFiled: December 5, 2002Publication date: March 9, 2006Applicant: Yanmar Agricultural Equipment Co., Ltd.Inventors: Susumu Akashima, Masakazu Komatsu
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Patent number: 6988571Abstract: The purpose of the invention is to enable a crawler tractor to brake and stop certainly without applying a load to an engine and a driving mechanism, and without complicated operation. An operation link links a conic linkage (53) which links a steering wheel (7) with a main speed change lever (55) of the crawler tractor, and with an operation mechanism of a brake pedal (54). A neutral return mechanism for the operation link is provided. The operation link neutral return mechanism comprises a hook-like cam lever (61). When the brake pedal is depressed, the main speed change lever is moved to its neutral position before braking force occurs, and then, the brake is actuated. Accordingly, engine brake is used effectively, and the brake can be miniaturized.Type: GrantFiled: April 3, 2002Date of Patent: January 24, 2006Inventors: Eiichi Okamoto, Masakazu Komatsu, Yukio Kubota, Susumu Nochi, Susumu Akashima, Takashi Uno, Gaku Higashiguchi, Shinsuke Tani, Kazuo Yamamoto
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Patent number: 6889782Abstract: A tractor having right and left traveling crawlers (9) installed thereon, comprising a hydraulic transmission swing mechanism (45), a forced-diff (41) for driving a crawler driving sprocket (4), and an engine (10), a hydraulic transmission straight-ahead driving mechanism (25), and a transmission case (12) disposed from the front side to the rear side of a machine body in that order, wherein an allowance for heat radiation is provided to a space under a machine floor for storing the hydraulic transmission straight-ahead driving mechanism (25) to eliminate the problem of the machine floor becoming too high, and the forced-diff (41) is driven by the hydraulic transmission swing mechanism (45) with a simple structure.Type: GrantFiled: October 12, 2001Date of Patent: May 10, 2005Assignee: Yanmar Agricultural Equipment Co., Ltd.Inventors: Masakazu Komatsu, Yuuji Kitasaka, Susumu Nochi, Yukio Kubota, Susumu Akashima
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Publication number: 20040149462Abstract: The purpose of the invention is to enable a crawler tractor to brake and stop certainly without applying a load to an engine and a driving mechanism, and without complicated operation. An operation link links a conic linkage (53) which links a steering wheel (7) with a main speed change lever (55) of the crawler tractor, and with an operation mechanism of a brake pedal (54). A neutral return mechanism for the operation link is provided. The operation link neutral return mechanism comprises a hook-like cam lever (61). When the brake pedal is depressed, the main speed change lever is moved to its neutral position before braking force occurs, and then, the brake is actuated. Accordingly, engine brake is used effectively, and the brake can be miniaturized.Type: ApplicationFiled: December 18, 2003Publication date: August 5, 2004Inventors: Eiichi Okamoto, Masakazu Komatsu, Yukio Kubota, Susumu Nochi, Susumu Akashima, Takashi Uno, Gaku Higashiguchi, Shinsuke Tani, Kazuo Yamamoto
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Patent number: D558797Type: GrantFiled: January 29, 2007Date of Patent: January 1, 2008Assignee: Yanmar Co., Ltd.Inventors: Noboru Yamamoto, Susumu Akashima
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Patent number: D483043Type: GrantFiled: November 27, 2002Date of Patent: December 2, 2003Assignee: Yanmar Agricultural Equipment Co., Ltd.Inventors: Susumu Akashima, Masakazu Komatsu