Patents by Inventor Yasuro Kikuchi
Yasuro Kikuchi 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: 20210407788Abstract: A short-arc discharge lamp includes a pair of electrodes disposed facing each other inside a light-emitting tube, a scale-like structure being formed on an outer surface of at least one electrode of the pair of electrodes, and a coating film covering the outer surface on which the scale-like structure is formed. The scale-like structure includes a plurality of flaky protrusions protruding from the outer surface in a direction inclined with respect to a normal direction of the outer surface, each flaky protrusion having a front surface whose angle formed with the outer surface is an obtuse angle and a back surface whose angle formed with the outer surface is an acute angle. The coating film contains at least one of metal oxides, metal carbides, metal borides, metal silicides, and metal nitrides. A part of the coating film enters a space sandwiched between the back surface and the outer surface.Type: ApplicationFiled: June 18, 2021Publication date: December 30, 2021Applicant: Ushio Denki Kabushiki KaishaInventors: Yasuro KIKUCHI, Takumi YAMANE
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Patent number: 11211240Abstract: A short-arc discharge lamp includes a pair of electrodes disposed facing each other inside a light-emitting tube, a scale-like structure being formed on an outer surface of at least one electrode of the pair of electrodes, and a coating film covering the outer surface on which the scale-like structure is formed. The scale-like structure includes a plurality of flaky protrusions protruding from the outer surface in a direction inclined with respect to a normal direction of the outer surface, each flaky protrusion having a front surface whose angle formed with the outer surface is an obtuse angle and a back surface whose angle formed with the outer surface is an acute angle. The coating film contains at least one of metal oxides, metal carbides, metal borides, metal silicides, and metal nitrides. A part of the coating film enters a space sandwiched between the back surface and the outer surface.Type: GrantFiled: June 18, 2021Date of Patent: December 28, 2021Assignee: Ushio Denki Kabushiki KaishaInventors: Yasuro Kikuchi, Takumi Yamane
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Patent number: 8143787Abstract: A xenon lamp having a lamp tube made of silica glass containing titanium oxide and having a discharge chamber with a light emitting part containing xenon and in which a cathode and an anode are arranged in opposition to each other, the cathode and anode being mounted on an end of a respective lead rod, the lamp tube also having side tube parts extending from each of opposite sides of the light emitting part, each lead rod being sealed by a gradient binding part which is arranged in a respective side tube part, and the side tube parts having a narrowed shrink part in a region facing the light emitting part, wherein a conductive film is provided on an outer surface area of the shrink part and an adjoining area of an outer surface of the light emitting part at the cathode side of the lamp tube; and wherein the conductive film is electrically connected to the cathode.Type: GrantFiled: May 26, 2009Date of Patent: March 27, 2012Assignee: Ushiodenki Kabushiki KaishaInventors: Yasuro Kikuchi, Kyosuke Fujina
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Patent number: 7719193Abstract: A discharge lamp includes a cathode and an anode which face each other in an arc tube, wherein the cathode is made of tungsten in which thorium oxide is doped. The cathode has a cylindrical body portion, a tip portion having a cone shape, and a middle portion formed between the body portion and the tip portion, wherein an angle ?1 of the tip portion is set to a range of 55 degrees??1?65 degrees, and an angle ?2 formed by side faces of the middle portion is smaller than that of the tip portion.Type: GrantFiled: January 30, 2008Date of Patent: May 18, 2010Assignee: Ushio Denki Kabushiki KaishaInventors: Yasuro Kikuchi, Kyosuke Fujina
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Publication number: 20090295289Abstract: A xenon lamp having a lamp tube made of silica glass containing titanium oxide and having a discharge chamber with a light emitting part containing xenon and in which a cathode and an anode are arranged in opposition to each other, the cathode and anode being mounted on an end of a respective lead rod, the lamp tube also having side tube parts extending from each of opposite sides of the light emitting part, each lead rod being sealed by a gradient binding part which is arranged in a respective side tube part, and the side tube parts having a narrowed shrink part in a region facing the light emitting part, wherein a conductive film is provided on an outer surface area of the shrink part and an adjoining area of an outer surface of the light emitting part at the cathode side of the lamp tube; and wherein the conductive film is electrically connected to the cathode.Type: ApplicationFiled: May 26, 2009Publication date: December 3, 2009Applicant: Ushiodenki Kabushiki KaishaInventors: Yasuro KIKUCHI, Kyosuke FUJINA
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Patent number: 7586263Abstract: A high pressure discharge lamp, in which an anode and a cathode are disposed opposite each other in a bulb, achieves a long service life due to thorium (Th) being stably supplied to the cathode tip for a long time after lamp operation has been commence since the formation of the flicker phenomenon is suppressed over a long time due to the cathode being made of tungsten which contains thorium oxide on a surface space from the cathode tip, a carbide layer of tungsten carbide is formed and the cathode being bordered by an emitter containing body of tungsten which contains thorium dioxide, and a carbide layer of tungsten carbide being formed at least in a region bordering the cathode.Type: GrantFiled: March 29, 2007Date of Patent: September 8, 2009Assignee: Ushiodenki Kabushiki KaishaInventors: Shunichi Morimoto, Norihiro Inaoka, Yasuro Kikuchi
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Publication number: 20080185965Abstract: A discharge lamp comprises a cathode and an anode which face each other in an arc tube, wherein the cathode is made of tungsten in which thorium oxide is doped. The cathode has a cylindrical body portion, a tip portion having a cone shape, and a middle portion formed between the body portion and the tip portion, wherein an angle ?1 of the tip portion is set to a range of 55 degrees??1?65 degrees, and an angle ?2 formed by side faces of the meddle portion is smaller than that of the tip portion.Type: ApplicationFiled: January 30, 2008Publication date: August 7, 2008Applicant: USHIO DENKI KABUSHIKI KAISHAInventors: Yasuro Kikuchi, Kyosuke Fujina
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Patent number: 7397191Abstract: A high pressure discharge lamp in which the cathode has a cylindrical body part and a conical part which is doped with thorium dioxide (ThO2), and with a diameter which decreases in a direction from the body part toward the tip area of the conical part by at least one light receiving surface area being formed between the body part and the tip area of the cone in a base part of the conical part. The light receiving area lies at an angle with respect to the center axis of the conical part and the body part, said angle which is measured from the side of the body part being greater than the angle of inclination which is formed between the outer periphery of the conical part in the tip area of the cone and the center axis.Type: GrantFiled: November 3, 2004Date of Patent: July 8, 2008Assignee: Ushiodenki Kabushiki KaishaInventors: Yasuro Kikuchi, Norihiro Inaoka, Kyosuke Fujina
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Publication number: 20070228982Abstract: A high pressure discharge lamp, in which an anode and a cathode are disposed opposite each other in a bulb, achieves a long service life due to thorium (Th) being stably supplied to the cathode tip for a long time after lamp operation has been commence since the formation of the flicker phenomenon is suppressed over a long time due to the cathode being made of tungsten which contains thorium oxide on a surface space from the cathode tip, a carbide layer of tungsten carbide is formed and the cathode being bordered by an emitter containing body of tungsten which contains thorium dioxide, and a carbide layer of tungsten carbide being formed at least in a region bordering the cathode.Type: ApplicationFiled: March 29, 2007Publication date: October 4, 2007Applicant: USHIODENKI KABUSHIKI KAISHAInventors: Shunichi MORIMOTO, Norihiro INAOKA, Yasuro KIKUCHI
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Patent number: 7057345Abstract: A short arc discharge lamp has improved starting properties in which there is no danger of damaging the arc tube that surrounds a discharge space and in which the radiant light from the arc tube is not adversely shielded. This is achieved by providing the short arc discharge lamp with a first electrode having an electrical potential and to which a high voltage is applied, and a second electrode opposite the first at a in spaced relationship. Additionally, in the discharge space, there is positioned at least one conductive component with a tip projecting into the discharge space. The conductive component has an electrical potential which is identical to the electrical potential of the first electrode and has a tip spaced a distance from the second electrode which is greater than the distance between the first and the second electrode.Type: GrantFiled: July 15, 2003Date of Patent: June 6, 2006Assignee: Ushiodenki Kabushiki KaishaInventors: Yasuro Kikuchi, Yoichiro Higashimoto, Takeo Matsushima
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Publication number: 20050099121Abstract: A high pressure discharge lamp in which the cathode has a cylindrical body part and a conical part which is doped with thorium dioxide (ThO2), and with a diameter which decreases in a direction from the body part toward the tip area of the conical part by at least one light receiving surface area being formed between the body part and the tip area of the cone in a base part of the conical part. The light receiving area lies at an angle with respect to the center axis of the conical part and the body part, said angle which is measured from the side of the body part being greater than the angle of inclination which is formed between the outer periphery of the conical part in the tip area of the cone and the center axis.Type: ApplicationFiled: November 3, 2004Publication date: May 12, 2005Applicant: Ushiodenki Kabushiki KaishaInventors: Yasuro Kikuchi, Norihiro Inaoka, Kyosuke Fujina
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Publication number: 20040075390Abstract: A short arc discharge lamp has improved starting properties in which there is no danger of damaging the arc tube that surrounds a discharge space and in which the radiant light from the arc tube is not adversely shielded. This is achieved by providing the short arc discharge lamp with a first electrode having an electrical potential and to which a high voltage is applied, and a second electrode opposite the first at a in spaced relationship. Additionally, in the discharge space, there is positioned at least one conductive component with a tip projecting into the discharge space. The conductive component has an electrical potential which is identical to the electrical potential of the first electrode and has a tip spaced a distance from the second electrode which is greater than the distance between the first and the second electrode.Type: ApplicationFiled: July 15, 2003Publication date: April 22, 2004Applicant: Ushiodenki Kabushiki KaishaInventors: Yasuro Kikuchi, Yoichiro Higashimoto, Takeo Matsushima
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Patent number: 6657383Abstract: A discharge lamp of the short arc type having a trigger wire which can be installed in a state which is suitable for a directional capacity of the electrode regardless of what type of base the lamp has is achieved by the trigger wire on the outside surface of an arc tube having the following characteristic: an annular area that is formed by a portion of the trigger wire which is looped around the arc tube and elastically held against the outside surface of the arc tube; a first holding part which adjoins a first end of the portion of the trigger wire that forms the annular area and which extends in an axial direction along the arc tube; a second holding part which adjoins a second end of end of the portion of the trigger wire that forms the annular area and which extends in the axial direction along the arc tube.Type: GrantFiled: June 7, 2002Date of Patent: December 2, 2003Assignee: Ushiodenki Kabushiki KaishaInventors: Takeo Matsushima, Yasuro Kikuchi, Kyosuke Fujina
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Publication number: 20020185972Abstract: A discharge lamp of the short arc type having a trigger wire which can be installed in a state which is suitable for a directional capacity of the electrode regardless of what type of base the lamp has is achieved by the trigger wire on the outside surface of an arc tube having the following characteristic:Type: ApplicationFiled: June 7, 2002Publication date: December 12, 2002Applicant: Ushiodenki Kabushiki kaishaInventors: Takeo Matsushima, Yasuro Kikuchi, Kyosuke Fujina