Patents by Inventor Satsuki Yamamoto
Satsuki Yamamoto 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: 11906014Abstract: This assembly includes a plurality of stacked circular members, and a fixing pin that is disposed inside each of the circular members to arrange and integrate each of the circular members in an axial direction thereof. The fixing pin includes a shaft portion extending in the axial direction, a flange portion extending radially outward from one end side of the shaft portion, a recessed portion that is provided on an end face of the shaft portion on the other side and has a non-circular cross-section orthogonal to the axial direction, and one or a plurality of protruding portions that are provided on an outer circumferential portion of the shaft portion on the other end side and protrude radially outward from an inner circumferential surface of each of the circular members.Type: GrantFiled: July 21, 2020Date of Patent: February 20, 2024Assignee: HITACHI ASTEMO, LTD.Inventors: Hiroyuki Matsumoto, Satsuki Yamamoto, Chigaya Sekine
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Publication number: 20220260130Abstract: A rebound control mechanism includes: a spring member located between a piston and a rod guide and provided on an outer periphery of a piston rod; and a spring receiver provided on the side of the rod guide and to which an upper portion of the spring member is attached. The spring receiver includes a tubular portion fixed between a cylinder and the rod guide, and a second flange portion provided at a lower end of the tubular portion and extending inward in a radial direction, and is configured to indirectly fix the upper end side of the spring member by the second flange portion.Type: ApplicationFiled: June 5, 2020Publication date: August 18, 2022Inventors: Chigaya SEKINE, Satsuki YAMAMOTO
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Publication number: 20220252126Abstract: This assembly includes a plurality of stacked circular members, and a fixing pin that is disposed inside each of the circular members to arrange and integrate each of the circular members in an axial direction thereof. The fixing pin includes a shaft portion extending in the axial direction, a flange portion extending radially outward from one end side of the shaft portion, a recessed portion that is provided on an end face of the shaft portion on the other side and has a non-circular cross-section orthogonal to the axial direction, and one or a plurality of protruding portions that are provided on an outer circumferential portion of the shaft portion on the other end side and protrude radially outward from an inner circumferential surface of each of the circular members.Type: ApplicationFiled: July 21, 2020Publication date: August 11, 2022Inventors: Hiroyuki MATSUMOTO, Satsuki YAMAMOTO, Chigaya SEKINE
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Patent number: 8544621Abstract: A shock absorber which facilitates an insertion/fixation operation. The shock absorber includes a spring-force application unit (84) for applying a force in a valve-closing direction to a disc valve while allowing the fixed shaft to be inserted therethrough; and a cylindrical member (47) for allowing the fixed shaft (21) to be inserted therethrough. The disc valve includes a plurality of valve discs (53) to (58). The cylindrical member is inserted into each of the valve discs (53) to (58) and the spring-force application unit (84), in which: the cylindrical member (47) is provided so as to have a radially extending gap on an inner side of the inner seat (31) of the valve main body (14).Type: GrantFiled: December 20, 2010Date of Patent: October 1, 2013Assignee: Hitachi Automotive Systems, Ltd.Inventors: Satsuki Yamamoto, Shinichi Kagawa
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Patent number: 8191692Abstract: In a cylinder apparatus in the form of a shock absorber, a spring seat is mounted within a cylinder, and clearance-fitted to a piston rod with a first lateral clearance for moving along the piston rod longitudinally of the cylinder. The spring seat includes a longitudinal extension at one longitudinal end for defining a space between the longitudinal extension and the piston rod. A rebound spring is mounted around the piston rod within the cylinder. The rebound spring has one longitudinal end fixed to another longitudinal end of the spring seat. An elastic member is retained in the defined space by the longitudinal extension of the spring seat, and clearance-fitted to the piston rod with a second lateral clearance for moving along the piston rod longitudinally of the cylinder, wherein the second lateral clearance is smaller than the first lateral clearance.Type: GrantFiled: August 22, 2007Date of Patent: June 5, 2012Assignees: Nissan Motor Co., Ltd., Hitachi, Ltd.Inventors: Masatoshi Mori, Satsuki Yamamoto
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Publication number: 20110266105Abstract: Provided is a shock absorber which facilitates an insertion/fixation operation. The shock absorber includes a spring-force application unit (84) for applying a force in a valve-closing direction to the disc valve while allowing the fixed shaft to be inserted through the spring-force application units (53) to (58); and a cylindrical member (47) for allowing the fixed shaft (21) to be inserted therethrough, the cylindrical member being inserted into each of the valve discs (53) to (58) and the spring-force application unit (84), in which: the cylindrical member (47) is provided so as to have a radially extending gap on an inner side of the inner seat (31) of the valve main body (14).Type: ApplicationFiled: December 20, 2010Publication date: November 3, 2011Inventors: Satsuki YAMAMOTO, Shinichi Kagawa
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Patent number: 8047341Abstract: A hydraulic shock absorber enables its piston rod to be locked near its minimum length position and allows the locked condition to be visually confirmed easily. A cap member is secured to a distal end portion of a piston rod extending from a cylinder part, and a dust cover is secured to the cap member. A lock member is secured to an end of the cylinder part from which the piston rod extends to the outside. The lock member is cut and bent upward to form engaging portions. The cap member is cut and bent downward to form engaging pieces and windows. With the piston rod contracted to near its minimum length position, the cap member is rotated to engage the engaging portions and the engaging pieces with each other, thereby locking the piston rod. The engaged condition of the engaging portions and the engaging pieces can be visually confirmed through the windows.Type: GrantFiled: July 22, 2008Date of Patent: November 1, 2011Assignee: Hitachi, Ltd.Inventors: Satsuki Yamamoto, Yusuke Maegawa, Tetsuo Yoshida
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Publication number: 20090032345Abstract: A hydraulic shock absorber enables its piston rod to be locked near its minimum length position and allows the locked condition to be visually confirmed easily. A cap member is secured to a distal end portion of a piston rod extending from a cylinder part, and a dust cover is secured to the cap member. A lock member is secured to an end of the cylinder part from which the piston rod extends to the outside. The lock member is cut and bent upward to form engaging portions. The cap member is cut and bent downward to form engaging pieces and windows. With the piston rod contracted to near its minimum length position, the cap member is rotated to engage the engaging portions and the engaging pieces with each other, thereby locking the piston rod. The engaged condition of the engaging portions and the engaging pieces can be visually confirmed through the windows.Type: ApplicationFiled: July 22, 2008Publication date: February 5, 2009Inventors: Satsuki Yamamoto, Yusuke Maegawa, Tetsuo Yoshida
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Publication number: 20080088070Abstract: In a cylinder apparatus in the form of a shock absorber, a spring seat is mounted within a cylinder, and clearance-fitted to a piston rod with a first lateral clearance for moving along the piston rod longitudinally of the cylinder. The spring seat includes a longitudinal extension at one longitudinal end for defining a space between the longitudinal extension and the piston rod. A rebound spring is mounted around the piston rod within the cylinder. The rebound spring has one longitudinal end fixed to another longitudinal end of the spring seat. An elastic member is retained in the defined space by the longitudinal extension of the spring seat, and clearance-fitted to the piston rod with a second lateral clearance for moving along the piston rod longitudinally of the cylinder, wherein the second lateral clearance is smaller than the first lateral clearance.Type: ApplicationFiled: August 22, 2007Publication date: April 17, 2008Inventors: Masatoshi Mori, Satsuki Yamamoto