Patents by Inventor Takaharu Echigo
Takaharu Echigo 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: 6880681Abstract: A brake drum includes a ring-shaped drum body (13), and a friction member (16) secured to the inner circumferential surface (18) of the drum body. Because the drum body is formed of a lightweight Al alloy and the friction member is formed of an Al-base composite material, the brake drum can be reduced in weight as a whole. Further, because the friction member, having projecting portions (17a) formed on its outer periphery (17), is cast-enveloped by molten metal of the Al alloy, the friction member and the drum body can be firmly fastened together. Thus, even when a great braking force is applied to the drum brake, the friction member can be prevented from being undesirably detached from the drum body.Type: GrantFiled: May 23, 2001Date of Patent: April 19, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Takashi Koizumi, Takaharu Echigo, Hiroto Shoji, Yasuhiro Nakao, Kunitoshi Sugaya
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Publication number: 20050072640Abstract: A brake drum includes a ring-shaped drum body, and a friction member secured to the inner circumferential surface of the drum body. Because the drum body is formed of a lightweight Al alloy and the friction member is formed of an Al-base composite material, the brake drum can be reduced in weight as a whole. Further, because the friction member, having projection portions formed on its outer periphery, is cast enveloped by molten metal of the Al alloy, the friction member and the drum body can be firmly fastened together. Thus, even when a great braking force is applied to the drum brake, the friction member can be prevented from being undesirably detached from the drum body.Type: ApplicationFiled: November 23, 2004Publication date: April 7, 2005Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Takashi Koizumi, Takaharu Echigo, Hiroto Shoji, Yasuhiro Nakao, Kunitoshi Sugaya
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Patent number: 6871691Abstract: A method for injection molding a metallic material is disclosed in which an injecting material comprised of a half-solidified metallic material and a molten metallic material is injected into a cavity of a die from an injection cylinder through a gate thereof. A non-product portion remaining at the gate of the die is separated from a product portion while it is still hot. The separated high-temperature non-product portion is press-formed into a billet in the injection cylinder. Utilization of heat from the injecting material in melting the high-temperature billet enables reuse of the non-product portion remained at the gate and reduction of heat energy required in melting the billet.Type: GrantFiled: November 20, 2002Date of Patent: March 29, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo
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Publication number: 20040244935Abstract: An aluminum casting process using a casting mold in which after the cavity (25) is filled with an inert gas, magnesium is introduced into the cavity to have a magnesium layer (58a) deposited on the cavity wall. Then, nitrogen gas is introduced into the cavity to form magnesium nitride (58b) on the surface of the magnesium layer after the cavity wall is heated to a specific temperature. Then, molten aluminum is supplied to have an aluminum casting molded, while the surface of the molten aluminum (39) is reduced with magnesium nitride. This makes it possible to form magnesium nitride within a short time and decrease the amount of nitrogen gas as required.Type: ApplicationFiled: December 30, 2003Publication date: December 9, 2004Inventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo, Satoshi Matsuura
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Publication number: 20040206469Abstract: An aluminum casting method includes the step of applying in advance a mold release agent including magnesium to a mold surface. Thereafter, a nitrogen gas is injected into a cavity to cause reaction between the magnesium in the surface of the mold release agent and the nitrogen gas, thereby forming magnesium nitride. Since the nitrogen gas reacts only with the magnesium exposed in the surface of the mold release agent, the forming time of the magnesium nitride is reduced and also the amount of nitrogen gas used is reduced.Type: ApplicationFiled: February 2, 2004Publication date: October 21, 2004Inventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi sugaya, Takshi Kato, Takaharu Echigo, Satoshi Matsuura, Kenichi Kawasaki
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Publication number: 20040194274Abstract: A method of feeding a blank (31) by cutting a billet (11) for plastic working includes the steps of superimposing a plurality of annular members (15 to 18) having a coefficient of linear expansion smaller than that of the billet and an inside diameter slightly greater than the outside diameter of the billet on one another to assemble a tubular jig (12), inserting the billet into the assembled jig, heating the billet and the jig to a temperature at which the billet is half-molten, and cutting the billet into at least one blank by moving the annular members adjacent to one another in opposite directions. The cutting of the billet does not need a cutting tool, thus causing no wear of blades, and thereby allowing reduction in production cost. The billet can be cut into a plurality of pieces at a time, increasing productivity. Since the blanks can be fed together with the annular members, there is no need to reheat the blanks, providing increased productivity.Type: ApplicationFiled: January 20, 2004Publication date: October 7, 2004Inventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo, Satoshi Matsuura
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Publication number: 20040187965Abstract: A cast-bonding process includes a magnesium coating step and a magnesium nitride-forming step. The magnesium-coating step is carried out by supplying gasified magnesium into a mold in which a cast-in insert formed from an aluminum alloy, or an aluminum-based composite material is set, so that magnesium may coat the insert. The magnesium nitride-forming step is carried out by supplying nitrogen gas into the mold so that the coating magnesium and nitrogen gas may react to form magnesium nitride. Then, a molten aluminum alloy is poured into the mold for cast-bonding the insert.Type: ApplicationFiled: January 20, 2004Publication date: September 30, 2004Inventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo, Satoshi Matsuura
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Publication number: 20040000386Abstract: A molded brake disc having a central hub portion and an annular disc portion extending from the hub portion in a radial outward direction for frictional engagement with brake pads, wherein the disc portion is formed of metal matrix composite having a reinforcing material added to a metal matrix, and the hub portion is formed of metal which is inexpensive as compared to the metal matrix composition. Due to a limited use of the expensive metal matrix composite, the molded brake disc as a whole is inexpensive as compared to a conventional molded brake disc entirely formed of metal matrix composite.Type: ApplicationFiled: June 27, 2003Publication date: January 1, 2004Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo
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Publication number: 20030159896Abstract: A brake drum includes a ring-shaped drum body (13), and a friction member (16) secured to the inner circumferential surface (18) of the drum body. Because the drum body is formed of a lightweight Al alloy and the friction member is formed of an Al-base composite material, the brake drum can be reduced in weight as a whole. Further, because the friction member, having projecting portions (17a) formed on its outer periphery (17), is cast-enveloped by molten metal of the Al alloy, the friction member and the drum body can be firmly fastened together. Thus, even when a great braking force is applied to the drum brake, the friction member can be prevented from being undesirably detached from the drum body.Type: ApplicationFiled: November 26, 2002Publication date: August 28, 2003Inventors: Takashi Koizumi, Takaharu Echigo, Hiroto Shoji, Yasuhiro Nakao, Kunitoshi Sugaya
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Patent number: 6609286Abstract: A part is manufactured from a composite material containing an aluminum alloy as a metal matrix. Blanks are prepared from a billet of the composite material, and worked on in a press, while they are held at a temperature ranging from the solidus temperature, Ta, of the aluminum alloy minus 50 (Ta−50) deg. C. to Ta deg. C. At a temperature below (Ta−50), the blanks have too high a resistance to plastic deformation to be easily worked on. At a temperature over Ta, a liquid phase is produced and makes the blanks likely to crack easily during plastic deformation.Type: GrantFiled: May 3, 2001Date of Patent: August 26, 2003Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo
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Publication number: 20030070891Abstract: A molded brake disc having a central hub portion and an annular disc portion extending from the hub portion in a radial outward direction for frictional engagement with brake pads, wherein the disc portion is formed of metal matrix composite having a reinforcing material added to a metal matrix, and the hub portion is formed of metal which is inexpensive as compared to the metal matrix composition. Due to a limited use of the expensive metal matrix composite, the molded brake disc as a whole is inexpensive as compared to a conventional molded brake disc entirely formed of metal matrix composite.Type: ApplicationFiled: November 20, 2002Publication date: April 17, 2003Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo
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Publication number: 20030070785Abstract: A method for injection molding a metallic material is disclosed in which an injecting material comprised of a half-solidified metallic material and a molten metallic material is injected into a cavity of a die from an injection cylinder through a gate thereof. A non-product portion remaining at the gate of the die is separated from a product portion while it is still hot. The separated high-temperature non-product portion is press-formed into a billet in the injection cylinder. Utilization of heat from the injecting material in melting the high-temperature billet enables reuse of the non-product portion remained at the gate and reduction of heat energy required in melting the billet.Type: ApplicationFiled: November 20, 2002Publication date: April 17, 2003Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo
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Patent number: 6505670Abstract: A method for injection molding a metallic material is disclosed in which an injecting material comprised of a half-solidified metallic material and a molten metallic material is injected into a cavity of a die from an injection cylinder through a gate thereof. A non-product portion remaining at the gate of the die is separated from a product portion while it is still hot. The separated high-temperature non-product portion is press-formed into a billet in the injection cylinder. Utilization of heat from the injecting material in melting the high-temperature billet enables reuse of the non-product portion remained at the gate and reduction of heat energy required in melting the billet.Type: GrantFiled: July 10, 2001Date of Patent: January 14, 2003Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo
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Publication number: 20020020510Abstract: A method for injection molding a metallic material is disclosed in which an injecting material comprised of a half-solidified metallic material and a molten metallic material is injected into a cavity of a die from an injection cylinder through a gate thereof. A non-product portion remaining at the gate of the die is separated from a product portion while it is still hot. The separated high-temperature non-product portion is press-formed into a billet in the injection cylinder. Utilization of heat from the injecting material in melting the high-temperature billet enables reuse of the non-product portion remained at the gate and reduction of heat energy required in melting the billet.Type: ApplicationFiled: July 10, 2001Publication date: February 21, 2002Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo
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Publication number: 20010039710Abstract: A part is manufactured from a composite material containing an aluminum alloy as a metal matrix. Blanks are prepared from a billet of the composite material, and worked on in a press, while they are held at a temperature ranging from the solidus temperature, Ta, of the aluminum alloy minus 50 (Ta−50) deg. C to Ta deg. C. At a temperature below (Ta−50), the blanks have too high a resistance to plastic deformation to be easily worked on. At a temperature over Ta, a liquid phase is produced and makes the blanks likely to crack easily during plastic deformation.Type: ApplicationFiled: May 3, 2001Publication date: November 15, 2001Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo
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Patent number: 6303236Abstract: A method for manufacturing an aluminum-based composite plate is disclosed. The method comprises the step of producing an aluminum-based composite billet. The billet production step includes reducing, by magnesium nitride, an oxide-based ceramic as a porous molded body. The reduced oxide-based ceramic has improved wettability. An aluminum alloy is then caused to infiltrate into porous sections of the reduced oxide-based ceramic to thereby provide the aluminum-based composite billet. The billet is extrusion molded into a flat plate form by using an extrusion press. Plates of desired shapes are punched from the molded flat plate by using a press.Type: GrantFiled: February 11, 2000Date of Patent: October 16, 2001Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiro Nakao, Hiroto Shoji, Kunitoshi Sugaya, Takashi Kato, Takaharu Echigo