Patents by Inventor Teiichirou Chiba
Teiichirou Chiba 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: 9252523Abstract: An interlock mechanism of a motor, includes a terminal box configured to store a terminal used to connect a power supply cable to the motor; a lid configured to close the terminal box; a fixing member configured to fix the lid to the terminal box; a first connector attached to the lid; a second connector capable of being coupled with the first connector and configured to cover the fixing member in a state that the second connector is coupled with the first connector.Type: GrantFiled: November 14, 2012Date of Patent: February 2, 2016Assignee: Komatsu Ltd.Inventors: Hiroyuki Tokunaga, Akira Okabe, Teiichirou Chiba
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Patent number: 9077225Abstract: A stator is provided with a core and a winding. The core includes a plurality of slots and a plurality of teeth formed between the slots. The winding is composed of a plurality of wires W bundled in an irregular arrangement. The winding includes a plurality of coil portions wound on each of the teeth, and a connecting portion connecting the coil portions together. The winding has a twisted shape in the connecting portion.Type: GrantFiled: December 21, 2009Date of Patent: July 7, 2015Assignee: KOMATSU LTD.Inventors: Teiichirou Chiba, Daisuke Yoshida, Shunichi Koshiyama
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Patent number: 8946965Abstract: An armature of an electric motor includes a core and a winding. The core has a plurality of slots and a plurality of teeth formed between the slots. The winding is composed of a plurality of wires. The winding has a plurality of coil parts and connecting portions. The coil parts are inserted into the slots and wound around and across the teeth. The connecting portions connect the coil parts together. The winding has a twisted shape in the connecting portions.Type: GrantFiled: December 21, 2009Date of Patent: February 3, 2015Assignee: Komatsu Ltd.Inventors: Teiichirou Chiba, Tsuyoshi Kobayakawa, Daisuke Yoshida
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Publication number: 20140349516Abstract: An interlock mechanism of a motor, includes a terminal box configured to store a terminal used to connect a power supply cable to the motor; a lid configured to close the terminal box; a fixing member configured to fix the lid to the terminal box; a first connector attached to the lid; a second connector capable of being coupled with the first connector and configured to cover the fixing member in a state that the second connector is coupled with the first connector.Type: ApplicationFiled: November 14, 2012Publication date: November 27, 2014Applicant: Komatsu Ltd.Inventors: Hiroyuki Tokunaga, Akira Okabe, Teiichirou Chiba
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Publication number: 20140339937Abstract: An electrical motor that includes a circular stator attached to an inner side of a housing and a rotor disposed at an inner side of the stator in a radial direction, the electrical motor includes: a terminal connected to a power supply cable drawn from a coil of the stator; a terminal box that is attached to the housing and stores the terminal; and an insulating material that is disposed between the terminal box and the terminal and separable from the terminal.Type: ApplicationFiled: November 14, 2012Publication date: November 20, 2014Inventors: Hiroyuki Tokunaga, Ryo Ono, Akira Okabe, Natsuki Watanabe, Teiichirou Chiba
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Patent number: 8629594Abstract: A lubrication structure of a generator motor, includes: at least two bearings rotatably supporting an input/output shaft of the generator motor; a gap provided between the two bearings; a cylindrical-shaped bearing attaching member attached to inner peripheral parts of the two bearings; and a through hole penetrating the bearing attaching member outward in a radial direction and opening in a position overlapping with the gap.Type: GrantFiled: March 26, 2012Date of Patent: January 14, 2014Assignee: Komatsu Ltd.Inventors: Yukihiko Sugimoto, Teiichirou Chiba
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Publication number: 20130334912Abstract: A motor cooling structure for cooling a motor, which includes a shaft transmitting power and a rotor core attached to an outside of the shaft, by a cooling medium, includes: a cooling medium supply passage that extends to an inside of the shaft in an axial direction of the shaft and passes the cooling medium through the cooling medium supply passage; and a plurality of cooling medium passages that are branched from the cooling medium supply passage to cool the rotor core while flowing the cooling medium without branching the cooling medium in the axial direction and then eject the cooling medium from a plurality of ejection holes opened to a surface of the rotor core, wherein distances from a cooling medium inlet, through which the cooling medium flows into the cooling medium supply passage, to the respective ejection holes are equal between the plurality of cooling medium passages.Type: ApplicationFiled: March 1, 2012Publication date: December 19, 2013Applicant: KOMATSU LTD.Inventors: Hiroyuki Tokunaga, Akira Okabe, Kazuhiro Okamoto, Teiichirou Chiba, Natsuki Watanabe
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Patent number: 8569919Abstract: A generator motor includes a flange, stationary-side members, rotor-side members, and latching members. The flange is removably mounted on a first end side in an axial direction. The stationary-side members are fixed on a second end side that is on an opposite side from the first end side in the axial direction. The rotor-side members are configured to move toward the first end side in the axial direction with respect to the stationary-side members in a state in which the flange has been removed. The latching members are configured to restrict relative movement of the flange in the axial direction with respect to the rotor-side members.Type: GrantFiled: March 26, 2012Date of Patent: October 29, 2013Assignee: Komatsu Ltd.Inventors: Yukihiko Sugimoto, Teiichirou Chiba, Takashi Kikuchi
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Publication number: 20130119803Abstract: A generator motor includes a flange, stationary-side members, rotor-side members, and latching members. The flange is removably mounted on a first end side in an axial direction. The stationary-side members are fixed on a second end side that is on an opposite side from the first end side in the axial direction. The rotor-side members are configured to move toward the first end side in the axial direction with respect to the stationary-side members in a state in which the flange has been removed. The latching members are configured to restrict relative movement of the flange in the axial direction with respect to the rotor-side members.Type: ApplicationFiled: March 26, 2012Publication date: May 16, 2013Inventors: Yukihiko Sugimoto, Teiichirou Chiba, Takashi Kikuchi
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Publication number: 20130057094Abstract: A lubrication structure of a generator motor, includes: at least two bearings rotatably supporting an input/output shaft of the generator motor; a gap provided between the two bearings; a cylindrical-shaped bearing attaching member attached to inner peripheral parts of the two bearings; and a through hole penetrating the bearing attaching member outward in a radial direction and opening in a position overlapping with the gap.Type: ApplicationFiled: March 26, 2012Publication date: March 7, 2013Applicant: KOMATSU LTD.Inventors: Yukihiko Sugimoto, Teiichirou Chiba
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Patent number: 8232697Abstract: An output shaft and an input shaft are connected with a connection member interposed therebetween, and a motor rotor is provided outside the connection member. Part of oil flowing down from an oil supply opening 11a of a motor housing MH is supplied to a first spline joint section of the input shaft and the connection member through a space and an opening of a bearing flange fixed to the motor housing MH. The oil lubricating the first spline joint section moves along an inner circumferential surface of a hole by a centrifugal force generated by rotation of the connection member, the oil moves in a radial direction along an end face on one end section side of the connection member 40 in one end section of the connection member, and the oil is supplied to a second spline joint section of the output shaft and the connection member.Type: GrantFiled: July 18, 2008Date of Patent: July 31, 2012Assignee: Komatsu Ltd.Inventors: Teiichirou Chiba, Yukihiko Sugimoto
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Patent number: 8084908Abstract: A generator/motor includes a ring-shaped stator core (20) fixed to a motor housing (10), and a motor rotor (30). The motor rotor (30) includes a ring-shaped rotor yoke (35) which rotates in cooperation with the crankshaft (1) and which is opposed to an inner peripheral surface of the stator core (20) with a predetermined gap therebetween. The motor rotor (30) also includes a rotor flange (31) which fixes and supports the rotor yoke (35) at its outer peripheral surface. The rotor flange (31) is rotatably supported by a support member (51a) of the motor housing (10) through a bearing (60). A cylindrical shaft portion (40) is interposed between the crankshaft (1) and the motor rotor (30), and the crankshaft (1) is spline coupled to the cylindrical shaft portion (40).Type: GrantFiled: May 9, 2006Date of Patent: December 27, 2011Assignee: Komatsu Ltd.Inventor: Teiichirou Chiba
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Publication number: 20110210641Abstract: An armature of an electric motor includes a core and a winding. The core has a plurality of slots and a plurality of teeth formed between the slots. The winding is composed of a plurality of wires. The winding has a plurality of coil parts and connecting portions. The coil parts are inserted into the slots and wound around and across the teeth. The connecting portions connect the coil parts together. The winding has a twisted shape in the connecting portions.Type: ApplicationFiled: December 21, 2009Publication date: September 1, 2011Applicant: KOMATSU LTD.Inventors: Teiichirou Chiba, Tsuyoshi Kobayakawa, Daisuke Yoshida
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Publication number: 20110210642Abstract: A stator is provided with a core and a winding. The core includes a plurality of slots and a plurality of teeth formed between the slots. The winding is composed of a plurality of wires W bundled in an irregular arrangement. The winding includes a plurality of coil portions wound on each of the teeth, and a connecting portion connecting the coil portions together. The winding has a twisted shape in the connecting portion.Type: ApplicationFiled: December 21, 2009Publication date: September 1, 2011Applicant: KOMATSU LTD.Inventors: Teiichirou Chiba, Daisuke Yoshida, Shunichi Koshiyama
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Publication number: 20110001400Abstract: An output shaft and an input shaft are connected with a connection member interposed therebetween, and a motor rotor is provided outside the connection member. Part of oil flowing down from an oil supply opening 11a of a motor housing MH is supplied to a first spline joint section of the input shaft and the connection member through a space and an opening of a bearing flange fixed to the motor housing MH. The oil lubricating the first spline joint section moves along an inner circumferential surface of a hole by a centrifugal force generated by rotation of the connection member, the oil moves in a radial direction along an end face on one end section side of the connection member 40 in one end section of the connection member, and the oil is supplied to a second spline joint section of the output shaft and the connection member.Type: ApplicationFiled: July 18, 2008Publication date: January 6, 2011Applicant: KOMATSU LTD.Inventors: Teiichirou Chiba, Yukihiko Sugimoto
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Publication number: 20090302720Abstract: A generator/motor includes a ring-shaped stator core (20) fixed to a motor housing (10), and a motor rotor (30). The motor rotor (30) includes a ring-shaped rotor yoke (35) which rotates in cooperation with the crankshaft (1) and which is opposed to an inner peripheral surface of the stator core (20) with a predetermined gap therebetween. The motor rotor (30) also includes a rotor flange (31) which fixes and supports the rotor yoke (35) at its outer peripheral surface. The rotor flange (31) is rotatably supported by a support member (51a) of the motor housing (10) through a bearing (60). A cylindrical shaft portion (40) is interposed between the crankshaft (1) and the motor rotor (30), and the crankshaft (1) is spline coupled to the cylindrical shaft portion (40).Type: ApplicationFiled: May 9, 2006Publication date: December 10, 2009Applicant: KOMATSU LTD.Inventor: Teiichirou Chiba
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Patent number: 6810061Abstract: A film is formed on the discharge parts of the main discharge electrodes. In order to prevent erosion of the discharge parts by the halogen gas contained in the laser gas, a substance that tends not to react with the halogen gas, i.e., a halogen-resistant substance, is used for this film. Furthermore, in order to prevent deformation of the discharge parts by the bombardment and heat of the main discharge, a substance that has a higher hardness than the metal of the main discharge electrodes or a substance that has a higher melting point than the metal of the main discharge electrodes is used for this film. As a result, deterioration of the electrodes can be inhibited, so that a stable laser output can be obtained, and the replacement interval of the electrodes can be extended.Type: GrantFiled: August 22, 2002Date of Patent: October 26, 2004Assignees: Komatsu Ltd., Gigaphoton Inc.Inventors: Tsukasa Hori, Akira Sumitani, Takayuki Yabu, Teiichirou Chiba, Hakaru Mizoguchi, Osamu Wakabayashi, Junichi Fujimoto
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Patent number: 6777820Abstract: To provide a semiconductor wafer having dot marks produced by irradiating laser beam capable of selecting a marking region capable of reading and writing marks in a state in which the marks hardly vanish and the semiconductor wafer is contained in a wafer cassette, inscribing information of an identification number or electric properties in the region and grasping past history by a unit of the wafer in processing steps or semiconductor fabrication steps thereafter, a very small dot mark is formed by irradiating laser having a diameter of 1 through 13 &mgr;m on an inner wall face of a notch (1) formed on an outer peripheral face of a semiconductor wafer (W), particularly on an inclined face of its peripheral edge.Type: GrantFiled: January 27, 2000Date of Patent: August 17, 2004Assignee: Komatsu Electronic Metals Co., Ltd.Inventors: Teiichirou Chiba, Etsurou Satou, Jun Tajika
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Patent number: 6774340Abstract: A dot mark forming method for obtaining a dot mark includes a liquid crystal mask in which the maximum length of each pixel is 50 to 2,000 &mgr;m and is irradiated with a homogenized laser beam. The energy density of a split laser beam passed through the liquid crystal mask is set to 1.0 to 15.0 J/cm2 and is condensed after the mask by a lens unit so that the maximum length of each dot becomes 1 to 15 &mgr;m. A single dot mask is formed on each laser irradiated point. The dot mark has a protrusion in the center which protrudes upward from the surface of the article to be marked. The length along the surface of the article is 1 to 15 &mgr;m and the height of the protrusion is 0.01 to 5 &mgr;m.Type: GrantFiled: May 23, 2000Date of Patent: August 10, 2004Assignee: Komatsu LimitedInventors: Teiichirou Chiba, Ryuusuke Komura
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Publication number: 20030042436Abstract: A film is formed on the discharge parts of the main discharge electrodes. In order to prevent erosion of the discharge parts by the halogen gas contained in the laser gas, a substance that tends not to react with the halogen gas, i.e., a halogen-resistant substance, is used for this film. Furthermore, in order to prevent deformation of the discharge parts by the bombardment and heat of the main discharge, a substance that has a higher hardness than the metal of the main discharge electrodes or a substance that has a higher melting point than the metal of the main discharge electrodes is used for this film. As a result, deterioration of the electrodes can be inhibited, so that a stable laser output can be obtained, and the replacement interval of the electrodes can be extended.Type: ApplicationFiled: August 22, 2002Publication date: March 6, 2003Inventors: Tsukasa Hori, Akira Sumitani, Takayuki Yabu, Teiichirou Chiba, Hakaru Mizoguchi, Osamu Wakabayashi, Junichi Fujimoto