Patents by Inventor Naohiko Tsuzuki
Naohiko Tsuzuki 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: 7686067Abstract: A die casting machine 100 to fill by injecting molten metal into a die cavity 24 includes a variable displacement pump 16 driven by a servo motor 17 for discharging hydraulic fluid from a hydraulic fluid tank 40, an injection cylinder 11 with a slidable piston 12 assembled therein, hydraulic fluid pipes a and c for supplying hydraulic fluid discharged by the variable displacement pump 16 to the injection cylinder 11, hydraulic fluid pipes d, e1, g and a logic valve 14 connected to hydraulic fluid pipe c for supplying hydraulic fluid ejected from the injection cylinder 11 to hydraulic fluid pipe c with the piston 12 slid by the hydraulic fluid supplied to the injection cylinder 11.Type: GrantFiled: May 15, 2007Date of Patent: March 30, 2010Assignees: Denso Corporation, Toyo Machinery & Metal Co., Ltd.Inventors: Hideaki Harada, Hiromi Takagi, Naohiko Tsuzuki
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Publication number: 20070267166Abstract: A die casting machine 100 to fill by injecting molten metal into a die cavity 24 includes a variable displacement pump 16 driven by a servo motor 17 for discharging hydraulic fluid from a hydraulic fluid tank 40, an injection cylinder 11 with a slidable piston 12 assembled therein, hydraulic fluid pipes a and c for supplying hydraulic fluid discharged by the variable displacement pump 16 to the injection cylinder 11, hydraulic fluid pipes d, e1, g and a logic valve 14 connected to hydraulic fluid pipe c for supplying hydraulic fluid ejected from the injection cylinder 11 to hydraulic fluid pipe c with the piston 12 slid by the hydraulic fluid supplied to the injection cylinder 11.Type: ApplicationFiled: May 15, 2007Publication date: November 22, 2007Applicants: DENSO CORPORATION, TOYO MACHINERY & METAL CO., LTD.Inventors: Hideaki Harada, Hiromi Takagi, Naohiko Tsuzuki
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Patent number: 7159639Abstract: A direct-acting type diecasting machine having an inexpensive and simplified hydraulic circuit is provided, which includes: a mold clamping cylinder for clamping and opening/closing a mold in a direct-acting manner; a single two-way hydraulic pump driven by a driving motor for supplying hydraulic fluid to the mold clamping cylinder in two directions; a hydraulic circuit for driving the mold clamping cylinder by controlling supply of hydraulic fluid from the two-way hydraulic pump to the mold clamping cylinder and discharge of hydraulic fluid from the mold clamping cylinder which proceeds in accordance with movement of a piston of the mold clamping cylinder; and a hydraulic controller for controlling rotational speed of the driving motor associated with the two-way hydraulic pump in opening/closing the mold at high speed and controlling torque of the driving motor in clamping the mold.Type: GrantFiled: November 13, 2003Date of Patent: January 9, 2007Assignees: Toyo Machinery & Metal Co., Ltd., Denso CorporationInventors: Naohiko Tsuzuki, Hideaki Harada, Hiromi Takagi, Hitoshi Oosawa
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Patent number: 7004224Abstract: A diecasting machine capable of realizing highly precise injection of molten metal at high-speed without using an accumulator is provided, which includes: an injection cylinder for loading molten metal into a mold cavity by injection; a single two-way hydraulic pump driven by a driving motor for supplying hydraulic fluid to the injection cylinder in two directions; a hydraulic circuit for driving the injection cylinder by controlling supply of hydraulic fluid from the two-way hydraulic pump to the injection cylinder and discharge of hydraulic fluid from the injection cylinder which proceeds in accordance with movement of a piston of the injection cylinder; and a hydraulic controller for controlling rotational speed of the driving motor associated with the two-way hydraulic pump in injection/loading the molten metal and controlling torque of the driving motor in dwelling.Type: GrantFiled: November 13, 2003Date of Patent: February 28, 2006Assignees: Toyo Machinery and Metal Co., Ltd., Denso CorporationInventors: Naohiko Tsuzuki, Hideaki Harada, Hiromi Takagi, Hitoshi Oosawa
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Publication number: 20040099400Abstract: A diecasting machine capable of realizing highly precise injection of molten metal at high-speed without using an accumulator is provided, which includes: an injection cylinder for loading molten metal into a mold cavity by injection; a single two-way hydraulic pump driven by a driving motor for supplying hydraulic fluid to the injection cylinder in two directions; a hydraulic circuit for driving the injection cylinder by controlling supply of hydraulic fluid from the two-way hydraulic pump to the injection cylinder and discharge of hydraulic fluid from the injection cylinder which proceeds in accordance with movement of a piston of the injection cylinder; and a hydraulic controller for controlling rotational speed of the driving motor associated with the two-way hydraulic pump in injection/loading the molten metal and controlling torque of the driving motor in dwelling.Type: ApplicationFiled: November 13, 2003Publication date: May 27, 2004Applicants: Toyo Machinery & Metal Co., Ltd., Denso CorporationInventors: Naohiko Tsuzuki, Hideaki Harada, Hiromi Takagi, Hitoshi Oosawa
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Publication number: 20040099401Abstract: A direct-acting type diecasting machine having an inexpensive and simplified hydraulic circuit is provided, which includes: a mold clamping cylinder for clamping and opening/closing a mold in a direct-acting manner; a single two-way hydraulic pump driven by a driving motor for supplying hydraulic fluid to the mold clamping cylinder in two directions; a hydraulic circuit for driving the mold clamping cylinder by controlling supply of hydraulic fluid from the two-way hydraulic pump to the mold clamping cylinder and discharge of hydraulic fluid from the mold clamping cylinder which proceeds in accordance with movement of a piston of the mold clamping cylinder; and a hydraulic controller for controlling rotational speed of the driving motor associated with the two-way hydraulic pump in opening/closing the mold at high speed and controlling torque of the driving motor in clamping the mold.Type: ApplicationFiled: November 13, 2003Publication date: May 27, 2004Applicants: Toyo Machinery & Metal Co., Ltd., Denso CorporationInventors: Naohiko Tsuzuki, Hideaki Harada, Hiromi Takagi, Hitoshi Oosawa