Patents by Inventor Takamasa Kamioka
Takamasa Kamioka 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: 9327797Abstract: A guide member for a vehicle shock absorber having a construction with which, even when the guide member contacts an inside tube member, the operation of the vehicle shock absorber is not obstructed. A vehicle shock absorber system is provided with an outer tube, an inner tube, a damper cylinder which is connected to the outer tube and is positioned on the inside of the inner tube, a spring guide which is fixed onto the outer circumferential surface of the damper cylinder, and a coil spring which is positioned between the inner tube and the spring guide. The spring guide is provided with a guide main body portion and a low friction portion provided in a portion of the guide main body portion which contacts the inner tube when the outer tube and/or the inner tube has been bent. The low friction portion has a lower coefficient of friction than the guide main body portion.Type: GrantFiled: October 4, 2012Date of Patent: May 3, 2016Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventor: Takamasa Kamioka
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Publication number: 20140252706Abstract: A guide member for a vehicle shock absorber having a construction with which, even when the guide member contacts an inside tube member, the operation of the vehicle shock absorber is not obstructed. A vehicle shock absorber system is provided with an outer tube, an inner tube, a damper cylinder which is connected to the outer tube and is positioned on the inside of the inner tube, a spring guide which is fixed onto the outer circumferential surface of the damper cylinder, and a coil spring which is positioned between the inner tube and the spring guide. The spring guide is provided with a guide main body portion and a low friction portion provided in a portion of the guide main body portion which contacts the inner tube when the outer tube and/or the inner tube has been bent. The low friction portion has a lower coefficient of friction than the guide main body portion.Type: ApplicationFiled: October 4, 2012Publication date: September 11, 2014Inventor: Takamasa Kamioka
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Publication number: 20140157978Abstract: An air shock absorber includes seal members that maintain the sealing performance and slidability of the seal members. The air shock absorber includes a cylinder and a piston. The cylinder contains gases and is divided by the piston into a high pressure gas chamber and a low pressure gas chamber. A first seal member extends in a circumferential direction of the piston along its outer periphery. A second seal member is located on the outer periphery of the piston closer to the high pressure gas chamber than the first seal member is. A surface of the first seal member includes a groove. A surface of the second seal member faces the surface of the first seal member and includes a groove.Type: ApplicationFiled: December 4, 2013Publication date: June 12, 2014Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventors: Takamasa KAMIOKA, Noboru KAMIYA
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Patent number: 8689954Abstract: A vehicle suspension system that inhibits a pressure within a gas chamber from reducing below a threshold value. In one arrangement, the suspension system includes a shock absorber associated with a motorcycle. The shock absorber includes an upper gas chamber that is filled with air. An air pressure adjustment valve operates to supply air into the upper gas chamber from a supply of air outside of the shock absorber when the air pressure in the upper gas chamber becomes smaller than a lower threshold value.Type: GrantFiled: July 18, 2007Date of Patent: April 8, 2014Assignee: Yamaha Hatsudoki Kabushiki KaishaInventor: Takamasa Kamioka
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Patent number: 8474582Abstract: A cushion device includes a shock absorber and an accumulator. As a piston moves in a certain direction in a cylinder so that the shock absorber is compressed, oil in an oil chamber is discharged to the accumulator through an oil hose. The compression operation of the piston allows a slide member to slide and the capacity of an oil chamber is reduced. The oil in the oil chamber is discharged to a regulation unit through an oil hose. The regulation unit controls a valve by the pressure of the oil coming in from the oil chamber and applies resistance to the oil discharged from an oil chamber to an oil chamber.Type: GrantFiled: August 20, 2010Date of Patent: July 2, 2013Assignee: Yamaha Hatsudoki Kabushiki KaishaInventor: Takamasa Kamioka
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Patent number: 8408560Abstract: A saddle riding vehicle that allows the amount of roll to be reduced includes a vehicle body, a handle, and a suspension mechanism. The suspension mechanism is provided at a front portion of the vehicle body and supports a pair of left and right front wheels or a pair of left and right skis. The suspension mechanism includes a pair of left and right arm members and a pair of left and right air shock absorbers. The pair of left and right arm members supports the pair of front wheels or the pair of skis in a vertically movable manner. The pair of left and right air shock absorbers is coupled to the pair of arm members. The pair of left and right air shock absorbers each includes a cylinder, a piston, a piston rod, a first gas chamber, and a second gas chamber.Type: GrantFiled: November 23, 2010Date of Patent: April 2, 2013Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Takamasa Kamioka, Kotaro Ogura
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Publication number: 20110121524Abstract: A saddle riding type vehicle that allows the amount of roll to be reduced is provided. The saddle riding type vehicle includes a vehicle body, a handle, and a suspension mechanism. The suspension mechanism is provided at a front portion of the vehicle body and supports a pair of left and right front wheels or a pair of left and right skis. The suspension mechanism includes a pair of left and right arm members and a pair of left and right air shock absorbers. The pair of left and right arm members supports the pair of front wheels or the pair of skis in a vertically movable manner. The pair of left and right air shock absorbers is coupled to the pair of arm members. The pair of left and right air shock absorbers each includes a cylinder, a piston, a piston rod, a first gas chamber, and a second gas chamber. The cylinder stores gas. The piston is stored in the cylinder and has a front surface and a back surface. The piston rod is coupled to the back surface of the piston.Type: ApplicationFiled: November 23, 2010Publication date: May 26, 2011Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventors: Takamasa KAMIOKA, Kotaro OGURA
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Publication number: 20110057370Abstract: A cushion device includes a shock absorber and an accumulator. As a piston moves in a certain direction in a cylinder so that the shock absorber is compressed, oil in an oil chamber is discharged to the accumulator through an oil hose. The compression operation of the piston allows a slide member to slide and the capacity of an oil chamber is reduced. The oil in the oil chamber is discharged to a regulation unit through an oil hose. The regulation unit controls a valve by the pressure of the oil coming in from the oil chamber and applies resistance to the oil discharged from an oil chamber to an oil chamber.Type: ApplicationFiled: August 20, 2010Publication date: March 10, 2011Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventor: Takamasa KAMIOKA
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Publication number: 20080018028Abstract: A vehicle suspension system that inhibits a pressure within a gas chamber from reducing below a threshold value. In one arrangement, the suspension system includes a shock absorber associated with a motorcycle. The shock absorber includes an upper gas chamber that is filled with air. An air pressure adjustment valve operates to supply air into the upper gas chamber from a supply of air outside of the shock absorber when the air pressure in the upper gas chamber becomes smaller than a lower threshold value.Type: ApplicationFiled: July 18, 2007Publication date: January 24, 2008Applicant: Yamaha Hatsudoki Kabushiki KaishaInventor: Takamasa Kamioka
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Patent number: 6655510Abstract: An inner tube (2) connected to a vehicle body is inserted such that it is free to extend and contract in an outer tube (1) joined to a vehicle shaft. A partitioning member (3) divides an internal oil chamber at the end of the inner tube. A damping valve (4) and a bypass passage (3d) parallel to this damping valve (4) are disposed in this partitioning member (3). A control rod (5) opens and closes the bypass passage (3d). An actuator (20) in the inner tube (2) controls the control rod (5). By operating the control rod (5) via the actuator (20) to open/close the bypass passage (3d), the damping force generated is varied.Type: GrantFiled: September 17, 2001Date of Patent: December 2, 2003Assignee: Kayaba Industry Co., Ltd.Inventor: Takamasa Kamioka
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Publication number: 20020033309Abstract: An inner tube (2) connected to a vehicle body is inserted such that it is free to extend and contract in an outer tube (1) joined to a vehicle shaft. A partitioning member (3) which divides an internal oil chamber at the end of the inner tube is provided, a damping valve (4) and a bypass passage (3d) parallel to this damping valve (4) are disposed in this partitioning member (3), a control rod (5) which opens and closes the bypass passage (3d) is provided, and an actuator (20) which controls this control rod (5) is provided in the inner tube (2). By operating the control rod (5) via the actuator (20) to open/close the bypass passage (3d), the damping force generated is varied.Type: ApplicationFiled: September 17, 2001Publication date: March 21, 2002Inventor: Takamasa Kamioka