Patents by Inventor Hidekazu Michioka
Hidekazu Michioka 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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Publication number: 20050178232Abstract: There is provided a steering control device for a vehicle of a new structure utilizing a ball screw mechanism for compacting the structure. The steering control device for a vehicle includes a first input shaft 1 connected to a handle, a second input shaft 2 connected to a motor 8, an output shaft 3 connected to a steering wheel, a first transmission 6 for rotating a nut 5 in accordance with the rotational motion of the first input shaft 1 so as to transmit the rotational motion of the first input shaft 1 to the rotational motion of the output shaft 3, and a second transmission 7 for moving the nut 5 linearly in the axial direction with respect to the output shaft 3 in accordance with the rotational motion of the second input shaft 2 so as to transmit the rotational motion of the second input shaft 2 to the rotational motion of the output shaft 3. The center line of the second input shaft and the center line of the output shaft are aligned on substantially the same straight line.Type: ApplicationFiled: May 30, 2003Publication date: August 18, 2005Inventors: Katsuhiro Suda, Takao Najiri, Naoki Hikosaka, Hidekazu Michioka, Masashi Konomoto, Hiroshi Kaneshige, Masayuki Imamura, Katsuya Iida, Takeomi Kawakami
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Publication number: 20050153119Abstract: A tape-shaped product and a belt for ball chain are provided. A tape-shaped product of synthetic resin including a tape of a thermoplastic resin, and a preliminarily stretched fibrous member of a thermoplastic resin contained therein along longitudinally parallel edges or in proximity thereto of the tape; and a belt for ball chain, including a tape-shaped product of synthetic resin formed by injection molding together with a fibrous member as an insert of a resin of the same kind as the fibrous member so that the fibrous member is disposed along the longitudinal edges or in proximity thereto, ball-insetting holes disposed at equal intervals, and ball-retaining projections disposed around the holes.Type: ApplicationFiled: March 26, 2003Publication date: July 14, 2005Inventors: Nobuyuki Masumura, Kazuki Tomita, Akira Tochigi, Yuji Kokuno, Seiichi Ohira, Hidekazu Michioka, Katsuya Iida
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Patent number: 6892596Abstract: A rolling element interference preventer for a guide device prevents a number of rolling elements rolling at regular intervals in a continuous circulation path of the guide device from interfering with each other. The rolling element interference preventer is formed of a thermoplastic resin elastomer having a physical property in accordance with an expression, (A×B)÷C?18, where A represents a 10% elongation stress, B represents a tensile strength, and C represents a bending modulus of elasticity.Type: GrantFiled: March 29, 2004Date of Patent: May 17, 2005Assignee: GHK Co., Ltd.Inventors: Hidekazu Michioka, Katsuya Iida, Tomozumi Murata, Yoshiyuki Honjyo
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Publication number: 20050077395Abstract: A fuel injector having a fuel inlet, a fuel outlet, and a fuel passageway extending from the fuel inlet to the fuel outlet along a longitudinal axis. The fuel injector includes a body, a needle slidingly disposed within the body and a seat disposed at the fuel outlet. The seat has a plurality of passages, each of the plurality of passages having a central axis having an angle of inclination relative to the longitudinal axis.Type: ApplicationFiled: August 22, 2003Publication date: April 14, 2005Inventors: Hidekazu Michioka, Jeff Pace, Vernon Warner, Daniel Baker
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Patent number: 6874939Abstract: A ball screw comprises a screw shaft, a nut assembled with the screw shaft, a number of balls disposed in the ball rolling passage formed by a ball rolling groove formed to the screw shaft and a loaded ball rolling groove formed to the nut, a number of spacers disposed between the balls in the ball rolling passage, and a circulation member for circulating the balls and spacers in accordance with a relative motion of the nut with respect to the screw shaft. The circulation member is provided with a scoop-up groove for scooping the balls, when contacting the ball rolling in the ball rolling passage, at both side edge portions of the scoop-up groove and is also provided with a spacer scoop-up portion which contacts and scoops the spacer moving in the ball rolling passage without contacting the balls. Such circulation member will be preferably utilized for a motion guide device such as linear motion guide or spline shaft.Type: GrantFiled: June 23, 2003Date of Patent: April 5, 2005Assignee: THK Co., Ltd.Inventors: Hidekazu Michioka, Yasuyuki Abe
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Patent number: 6830378Abstract: An object of the invention is to provide a method of manufacturing a rolling element string wherein a smaller rolling element string can be manufactured easily at low cost, and a rolling element string being superior in the tensile strength and the flexural strength even after downsizing can be manufactured.Type: GrantFiled: August 22, 2003Date of Patent: December 14, 2004Assignee: THK Co., Ltd.Inventors: Hidekazu Michioka, Yasuhiro Matsumoto, Hiroshi Nakabayashi, Katsuya Iida, Daisuke Yatsushiro
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Publication number: 20040184685Abstract: A rolling element interference preventer for a guide device prevents a number of rolling elements rolling at regular intervals in a continuous circulation path of the guide device from interfering with each other. The rolling element interference preventer is formed of a thermoplastic resin elastomer having a physical property in accordance with an expression, (A×B)÷C≧18, where A represents a 10% elongation stress, B represents a tensile strength, and C represents a bending modulus of elasticity.Type: ApplicationFiled: March 29, 2004Publication date: September 23, 2004Applicant: THK Co., Ltd.Inventors: Hidekazu Michioka, Katsuya Iida, Tomozumi Murata, Yoshiyuki Honjyo
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Publication number: 20040177711Abstract: A wiper ring to be applied to a nut of a ball screw having a screw shaft comprises a plurality of segments each constituted as independent element having a seal portion to be contacted to the screw shaft, support pins extending in an axial direction of the screw shaft so as to correspond to the segments, respectively, the segments being arranged in a circumferential direction of the screw shaft to be rotatable about the pins, the pins being connected to each other through support members so as to limit the relative movement of the respective pins, and a spring member for urging the segments arranged circumferential direction of the screw shaft so as to be directed towards radially central side of the screw shaft.Type: ApplicationFiled: March 30, 2004Publication date: September 16, 2004Applicant: THK Co., Ltd.Inventors: Hidekazu Michioka, Katsuya Iida, Tetsuhiro Nishide
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Publication number: 20040170343Abstract: A motion guide device is provided with a rolling member connection belt for holding a series of rolling members which circulate in a circulation passage provided with a loaded rolling passage, a non-loaded return passage and a pair of rolling direction changing members connecting the loaded rolling passage and the non-loaded return passage to thereby constitute the circulation passage. The rolling member connection belt is formed from a metal plate member having a corrugated-shape, in section in a longitudinal direction thereof, formed at least to one portion thereof or entire portion thereof in the longitudinal direction, and the corrugated-shape has peak and valley portions each extending in a direction normal to the longitudinal direction of the metal plate member.Type: ApplicationFiled: February 9, 2004Publication date: September 2, 2004Applicant: THK CO., LTD.Inventor: Hidekazu Michioka
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Publication number: 20040159822Abstract: A coolant in a state of solution in which a water-soluble substance is dissolved is further included a sodium nitrite as additive by an amount of not less than 0.345 weight % for preventing crevice corrosion from causing particularly to a machining device such as machining center.Type: ApplicationFiled: August 20, 2003Publication date: August 19, 2004Inventors: Takeki Shirai, Hidekazu Michioka, Yuuichi Katayama, Shigetoshi Kobuchi, Makoto Kumada
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Patent number: 6733179Abstract: A rolling element interference preventer for a guide device prevents a number of rolling elements rolling at regular intervals in a continuous circulation path of the guide device from interfering with each other. The rolling element interference preventer is formed of a thermoplastic resin elastomer having a physical property in accordance with an expression, (A×B)÷C≧18, where A represents a 10% elongation stress, B represents a tensile strength, and C represents a bending modulus of elasticity.Type: GrantFiled: August 6, 2002Date of Patent: May 11, 2004Assignee: THK Co., Ltd.Inventors: Hidekazu Michioka, Katsuya Iida, Tomozumi Murata, Yoshiyuki Honjyo
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Patent number: 6732599Abstract: A wiper ring to be applied to a nut of a ball screw having a screw shaft comprises a plurality of segments each constituted as independent element having a seal portion to be contacted to the screw shaft, support pins extending in an axial direction of the screw shaft so as to correspond to the segments, respectively, the segments being arranged in a circumferential direction of the screw shaft to be rotatable about the pins, the pins being connected to each other through support members so as to limit the relative movement of the respective pins, and a spring member for urging the segments arranged circumferential direction of the screw shaft so as to be directed towards radially central side of the screw shaft.Type: GrantFiled: November 23, 2001Date of Patent: May 11, 2004Assignee: THK, Co., Ltd.Inventors: Hidekazu Michioka, Katsuya Iida, Tetsuhiro Nishide
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Patent number: 6729759Abstract: The present invention provides a track rail mounting structure of a rectilinear guide apparatus comprising a track rail having a rotating/running surface where a plenty of rotating/running bodies rotate and run; an endless circulation route for guiding the plenty of rotating/running bodies; and a slider movably arranged with respect to the track rail via the rotating/running bodies; wherein a base where the track rail is mounted has a groove for inserting a bottom portion of the track rail, so that the bottom portion of the track rail is inserted into the groove, and a pressure member is provided for pressing at least one side surface of the track rail toward an inner side surface of the groove.Type: GrantFiled: May 29, 2002Date of Patent: May 4, 2004Assignee: THK Co., Ltd.Inventors: Takeki Shirai, Hidekazu Michioka, Genjirou Ise, Hiroaki Kishi
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Patent number: 6715207Abstract: A method of manufacturing sliding bearings of the type in which a sliding guide surface is formed by using a resin liner, including fixing a thermosetting resin, which constitutes the resin liner, on the whole or a part of a sliding guide surface of a first member by an injection molding operation using the first member as a core, thereafter molding a second member, which covers a sliding guide surface of the first member, by a metal molding operation with the resin liner-fixed first member placed firmly as a core in a metal mold, and thermally curing the resin liner with the heat working on the sliding surface of the first member during the molding of this second member.Type: GrantFiled: February 15, 2002Date of Patent: April 6, 2004Assignee: THK Co., Ltd.Inventors: Hidekazu Michioka, Tomozumi Murata
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Publication number: 20040057640Abstract: An object of the invention is to provide a method of manufacturing a rolling element string wherein a smaller rolling element string can be manufactured easily at low cost, and a rolling element string being superior in the tensile strength and the flexural strength even after downsizing can be manufactured.Type: ApplicationFiled: August 22, 2003Publication date: March 25, 2004Applicant: THK CO., LTDInventors: Hidekazu Michioka, Yasuhiro Matsumoto, Hiroshi Nakabayashi, Katsuya Iida, Daisuke Yatsushiro
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Patent number: 6705430Abstract: This invention relates to a dust preventing structure of a guide unit comprising a track shaft and a sliding member engaging the track shaft via a plurality of rolling bodies such that it is capable of reciprocating in a length direction thereof. Elastic members in firm contact with the track shaft are overlaid in the length direction of the track shaft. A lubricant pocket forming member having a concave groove portion for forming a lubricant pocket constituted of the elastic members and filled with lubricant by a help of the surface of the track shaft as well is provided so as to achieve a smooth reciprocating motion of the sliding member with respect to the track shaft with less sliding friction. Particularly, under even a severe use condition in which use of coolant is required or dust, dirt, wooden pieces, cutting powder or the like falls on the guide unit, a smooth reciprocating motion of the sliding member with respect to the track shaft can be maintained in a long period.Type: GrantFiled: May 14, 2002Date of Patent: March 16, 2004Assignee: THK Co., Ltd.Inventors: Hidekazu Michioka, Yoshiaki Saitou, Yasuhide Katsumata, Mitsuaki Honma
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Patent number: 6685354Abstract: A guide apparatus includes a track rail having raceway surfaces for rolling elements formed longitudinally, a slider having a load raceway surface opposing the raceway surface and a return path for rolling elements disposed in parallel with the load raceway surface, and having paired reversal-of-direction paths completing an endless circulation path for rolling elements by connecting the load raceway surface with either end of the return path and is attached to the track rail to enable their relative movement, and plural rolling elements susceptible to load at a position between a load raceway surface of the slider and the raceway surface of the track rail and circulating in the endless circulation path. A step where the load raceway surface becomes lower than a sidewall surface at an inner diameter of the reversal-of-direction path is formed at a location where the reversal-of-direction path is connected to the load raceway surface.Type: GrantFiled: November 15, 2001Date of Patent: February 3, 2004Assignee: THK Co., Ltd.Inventors: Hidekazu Michioka, Tomozumi Murata
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Publication number: 20040000208Abstract: A ball screw comprises a screw shaft, a nut assembled with the screw shaft, a number of balls disposed in the ball rolling passage formed by a ball rolling groove formed to the screw shaft and a loaded ball rolling groove formed to the nut, a number of spacers disposed between the balls in the ball rolling passage, and a circulation member for circulating the balls and spacers in accordance with a relative motion of the nut with respect to the screw shaft. The circulation member is provided with a scoop-up groove for scooping the balls, when contacting the ball rolling in the ball rolling passage, at both side edge portions of the scoop-up groove and is also provided with a spacer scoop-up portion which contacts and scoops the spacer moving in the ball rolling passage without contacting the balls. Such circulation member will be preferably utilized for a motion guide device such as linear motion guide or spline shaft.Type: ApplicationFiled: June 23, 2003Publication date: January 1, 2004Applicant: THK CO., LTD.Inventors: Hidekazu Michioka, Yasuyuki Abe
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Publication number: 20030123951Abstract: A circulation member of a ball screw for circulating a ball rolling on a spiral ball rolling groove formed on a screw shaft comprises a central portion and a pair of leg portions disposed at both ends of the central portion so as to extend therefrom and so that free ends of the leg portions are disposed in the spiral ball rolling groove at different positions to thereby form a ball circulation passage. The leg portions have inner peripheries having center lines inclined in directions different from each other with respect to a center line of an inner periphery of the central portion.Type: ApplicationFiled: December 4, 2002Publication date: July 3, 2003Inventors: Hidekazu Michioka, Yasuyuki Abe, Hiroshi Niwa, Katsuya Iida, Toshiaki Kakuno, Takeki Shirai, Hironori Shoji
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Patent number: 6553855Abstract: A drive system comprises a track table comprising a flat portion, perpendicular side portions extending in parallel to each other along both lateral side edges of the flat portion and at least one partition section formed to the flat portion at a portion between the perpendicular side portions so as to extend in parallel to thereto, the movable tables fitted into a space between one of the perpendicular side portions and the partition section, the movable tables each having lateral side surfaces to which loaded ball rolling surfaces constituting ball circulation passages are formed so as to correspond to the ball rolling surfaces of the track table, a number of balls disposed and arranged in the ball circulation passages so as to circulate therein in accordance with relative movement between the track table and movable table, and a driving unit for driving the track table and the movable table relatively.Type: GrantFiled: March 29, 2001Date of Patent: April 29, 2003Assignee: THK Co., Ltd.Inventors: Kenji Takahashi, Hidekazu Michioka, Hiroshi Takamatsu