Patents Assigned to Sigma Co., Ltd.
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Patent number: 8033793Abstract: The present invention provides an impeller in which a metallic bush can be inserted correctly into a synthetic resin impeller main body manufactured by resin molding using a die, and a determination as to whether or not the impeller has been manufactured correctly can be made easily. The impeller comprises: a metallic bush comprising a circumferential boss portion having a substantially truncated cone-shaped throttle portion positioned on a front surface axial end side, a periaxial support boss portion positioned in an axial center, and a circumferential protruding portion positioned on a back surface axial end side; and an impeller main body made of synthetic resin and formed with a V-shaped bulging portion that bulges axially in the center of a front surface side of a disk-shaped vane portion fulcrum, in which a plurality of vanes are formed integrally on the periphery of the V-shaped bulging portion.Type: GrantFiled: August 9, 2007Date of Patent: October 11, 2011Assignees: Sigma Co., Ltd., Yamada Manufacturing Co., Ltd.Inventors: Kazuo Ikeda, Yasutaka Okuda, Ryouhei Adachi, Satoshi Maruyama, Satoshi Hoshino
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Patent number: 7934908Abstract: The present invention provides a manufacturing method for an impeller with which molding and high-quality finishing can be performed extremely easily and quickly through resin molding using a die, and an impeller manufactured by the impeller manufacturing method. A metallic bush is disposed in a die, whereupon a resin material is injected through a gate in the die. A connecting portion between an unnecessary resin portion formed from residual resin material in the gate and a resin impeller main body molded around the bush is formed to be thin, and the unnecessary resin portion is removed from the impeller main body using pushing or withdrawing means.Type: GrantFiled: August 9, 2007Date of Patent: May 3, 2011Assignees: Sigma Co., Ltd., Yamada Manufacturing Co., Ltd.Inventors: Kazuo Ikeda, Yasutaka Okuda, Satoshi Maruyama, Ryouhei Adachi
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Publication number: 20090165653Abstract: To provide an apparatus for gasifying and separating a liquid medium, which is of an automatic type and which can be increased in size.Type: ApplicationFiled: December 15, 2006Publication date: July 2, 2009Applicant: Techno Sigma Co., Ltd.Inventors: Shigeru Torii, Kouichi Miki, Katsumi Koretomo
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Publication number: 20080107539Abstract: The present invention provides a manufacturing method for an impeller with which molding and high-quality finishing can be performed extremely easily and quickly through resin molding using a die, and an impeller manufactured by the impeller manufacturing method. A metallic bush is disposed in a die, whereupon a resin material is injected through a gate in the die. A connecting portion between an unnecessary resin portion formed from residual resin material in the gate and a resin impeller main body molded around the bush is formed to be thin, and the unnecessary resin portion is removed from the impeller main body using pushing or withdrawing means.Type: ApplicationFiled: August 9, 2007Publication date: May 8, 2008Applicants: Sigma Co., Ltd., YAMADA MANUFACTURING CO., LTD.Inventors: Kazuo Ikeda, Yasutaka Okuda, Satoshi Maruyama, Ryouhei Adachi
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Publication number: 20080104837Abstract: The present invention provides an impeller in which a metallic bush can be inserted correctly into a synthetic resin impeller main body manufactured by resin molding using a die, and a determination as to whether or not the impeller has been manufactured correctly can be made easily. The impeller comprises: a metallic bush comprising a circumferential boss portion having a substantially truncated cone-shaped throttle portion positioned on a front surface axial end side, a periaxial support boss portion positioned in an axial center, and a circumferential protruding portion positioned on a back surface axial end side; and an impeller main body made of synthetic resin and formed with a V-shaped bulging portion that bulges axially in the center of a front surface side of a disk-shaped vane portion fulcrum, in which a plurality of vanes are formed integrally on the periphery of the V-shaped bulging portion.Type: ApplicationFiled: August 9, 2007Publication date: May 8, 2008Applicants: SIGMA CO., LTD., YAMADA MANUFACTURING CO., LTD.Inventors: Kazuo Ikeda, Yasutaka Okuda, Ryouhei Adachi, Satoshi Maruyama, Satoshi Hoshino
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Patent number: 4976529Abstract: A shape memory alloy is used for face-contacting parts (1, 3, 4, 5; 101) and lens-fixing parts (2) of a spectacle frame, and parts (12, 13; 103) connected thereto are formed of titanium, a titanium alloy, nickel, or a chromium alloy. These parts are suitable soldered by a soldering material (111) formed of 5-15 wt. % of palladium, 5-15 wt. % of gallium, and a balance consisting of silver.Type: GrantFiled: April 13, 1989Date of Patent: December 11, 1990Assignee: Sigma Co., Ltd.Inventors: Kazuo Segoshi, Toshiyuki Okuda, Kenji Okamura, Mizuo Yoshida
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Patent number: 4953966Abstract: A spectacle frame comprises a face-contacting portion such as a side and a lens-fixing portion such as a rim, both the portions being made of a shape memory alloy, and connecting members to be connected with the face-contacting portion and the lens-fixing portion. The connecting member is made of a titanium alloy, preferably .beta.-phase. The face-contacting portion and the lens-fixing portion are soldered to the connecting member with a palladium-based soldering material.Type: GrantFiled: January 6, 1989Date of Patent: September 4, 1990Assignee: Sigma Co., Ltd.Inventors: Kazuo Segoshi, Toshiyuki Okuda, Kenji Okamura, Mizuo Yoshida