Patents by Inventor Chih-Kuan Shih
Chih-Kuan Shih 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: 11739642Abstract: The disclosed embodiment is related to a manufacturing method of a die-formed 3-dimensional plastic impeller of a centrifugal pump and the impeller manufactured thereby, including a mold for twisted blade and a mold for impeller outlet, the mold for twisted blade is configured to form a twisted blade portion of each blade of the impeller, the mold for impeller outlet is configured to form a rear portion of each blade, a hub rim part of the impeller, and a shroud rim part of the impeller so that the hub rim part, the shroud rim part, and the blades are formed in a single piece at the same molding process.Type: GrantFiled: September 25, 2019Date of Patent: August 29, 2023Assignee: ASSOMA INC.Inventors: Chih-Hsien Shih, Chih-Kuan Shih, Huan-Jan Chien, Shu-Yen Chien, Chin-Cheng Wang, Yuan Hung Lin, Peng-Hsiang Chen
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Publication number: 20220213897Abstract: The disclosed embodiment is related to a manufacturing method of a die-formed 3-dimensional plastic impeller of a centrifugal pump and the impeller manufactured thereby, including a mold for twisted blade and a mold for impeller outlet, the mold for twisted blade is configured to form a twisted blade portion of each blade of the impeller, the mold for impeller outlet is configured to form a rear portion of each blade, a hub rim part of the impeller, and a shroud rim part of the impeller so that the hub rim part, the shroud rim part, and the blades are formed in a single piece at the same molding process.Type: ApplicationFiled: September 25, 2019Publication date: July 7, 2022Inventors: Chih-Hsien SHIH, Chih-Kuan SHIH, Huan-Jan CHIEN, Shu-Yen CHIEN, Chin-Cheng WANG, Yuan Hung Lin, PENG-HSIANG CHEN
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Patent number: 10267327Abstract: A sealless magnetic drive pump features in improving the stiffness of a stationary shaft. More particularly, the metal magnetic drive pump has an anti-corrosion casing liner. The magnetic drive pump is used in manufacture processes related to corrosive fluid. The pump is especially used in a highly corrosive and high-temperature (up to 200° C.) condition to improve the stiffness of a front support. The stationary shaft includes a metal front support integrated with the pump casing at a pump inlet and encapsulated with a resin enclosure made of a fluoropolymer; a rear shaft seat positioned on a sealed bottom side of a containment shell for offering auxiliary support for the stationary shaft; an impeller including a channel for reducing an inlet flow velocity to offer a low NPSHr.Type: GrantFiled: April 30, 2017Date of Patent: April 23, 2019Assignee: ASSOMA INC.Inventors: Huan-Jan Chien, Chin-Cheng Wang, Chih-Hsien Shih, Chih-Kuan Shih
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Patent number: 10190593Abstract: A sealless magnetic drive pump features in improving the stiffness of a stationary shaft. More particularly, the metal magnetic drive pump has an anti-corrosion casing liner. The magnetic drive pump is used in manufacture processes related to corrosive fluid. The pump is especially used in a highly corrosive and high-temperature (up to 200° C.) condition to improve the stiffness of a front support. The stationary shaft includes a metal front support integrated with the pump casing at a pump inlet and encapsulated with a resin enclosure made of a fluoropolymer; a rear shaft seat positioned on a sealed bottom side of a containment shell for offering auxiliary support for the stationary shaft; an impeller including a channel for reducing an inlet flow velocity to offer a low NPSHr.Type: GrantFiled: April 30, 2017Date of Patent: January 29, 2019Assignee: ASSOMA INC.Inventors: Huan-Jan Chien, Chin-Cheng Wang, Chih-Hsien Shih, Chih-Kuan Shih
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Patent number: 9897102Abstract: A structure improvement of a pump casing with a Polyfluoroalkoxy (PFA) liner which improves manufacturing efficiency, reduces manufacturing cost and improves yield strength, more particular to keep the stiffness of the shaft support and improve yield of the pump casing. The metal pump casing with the PFA liner used for handling corrosive liquids includes a suction casing with PFA liner, and a volute casing with PFA liner for accommodating an impeller. The volute casing also collects and then ejects the liquid through a discharge. The suction casing with the PFA liner and the volute casing with the PFA liner are separately formed as two workpieces by injection molding process and then assembled to form the pump casing so as to reduce the residual stress applied in the PFA liner.Type: GrantFiled: November 23, 2015Date of Patent: February 20, 2018Assignee: ASSOMA INC.Inventors: Chin-Cheng Wang, Chih-Hsien Shih, Chih-Kuan Shih, Yu-Lun Jhang, Huan-Jan Chien, Shu-Yen Chien
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Publication number: 20170234326Abstract: A sealless magnetic drive pump features in improving the stiffness of a stationary shaft. More particularly, the metal magnetic drive pump has an anti-corrosion casing liner. The magnetic drive pump is used in manufacture processes related to corrosive fluid. The pump is especially used in a highly corrosive and high-temperature (up to 200° C.) condition to improve the stiffness of a front support. The stationary shaft includes a metal front support integrated with the pump casing at a pump inlet and encapsulated with a resin enclosure made of a fluoropolymer; a rear shaft seat positioned on a sealed bottom side of a containment shell for offering auxiliary support for the stationary shaft; an impeller including a channel for reducing an inlet flow velocity to offer a low NPSHr.Type: ApplicationFiled: April 30, 2017Publication date: August 17, 2017Applicant: ASSOMA INC.Inventors: Huan-Jan CHIEN, Chin-Cheng WANG, Chih-Hsien SHIH, Chih-Kuan SHIH
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Publication number: 20170234327Abstract: A sealless magnetic drive pump features in improving the stiffness of a stationary shaft. More particularly, the metal magnetic drive pump has an anti-corrosion casing liner. The magnetic drive pump is used in manufacture processes related to corrosive fluid. The pump is especially used in a highly corrosive and high-temperature (up to 200° C.) condition to improve the stiffness of a front support. The stationary shaft includes a metal front support integrated with the pump casing at a pump inlet and encapsulated with a resin enclosure made of a fluoropolymer; a rear shaft seat positioned on a sealed bottom side of a containment shell for offering auxiliary support for the stationary shaft; an impeller including a channel for reducing an inlet flow velocity to offer a low NPSHr.Type: ApplicationFiled: April 30, 2017Publication date: August 17, 2017Applicant: ASSOMA INC.Inventors: Huan-Jan CHIEN, Chin-Cheng WANG, Chih-Hsien SHIH, Chih-Kuan SHIH
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Patent number: 9670934Abstract: A sealless magnetic drive pump features in improving the stiffness of a stationary shaft. More particularly, the metal magnetic drive pump has an anti-corrosion casing liner. The magnetic drive pump is used in manufacture processes related to corrosive fluid. The pump is especially used in a highly corrosive and high-temperature (up to 200° C.) condition to improve the stiffness of a front support. The stationary shaft includes a metal front support integrated with the pump casing at a pump inlet and encapsulated with a resin enclosure made of a fluoropolymer; a rear shaft seat positioned on a sealed bottom side of a containment shell for offering auxiliary support for the stationary shaft; an impeller including a channel for reducing an inlet flow velocity to offer a low NPSHr.Type: GrantFiled: October 22, 2012Date of Patent: June 6, 2017Assignee: ASSOMA INC.Inventors: Huan-Jan Chien, Chin-Cheng Wang, Chih-Hsien Shih, Chih-Kuan Shih
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Publication number: 20160363130Abstract: A structure improvement of a pump casing with a Polyfluoroalkoxy (PFA) liner which improves manufacturing efficiency, reduces manufacturing cost and improves yield strength, more particular to keep the stiffness of the shaft support and improve yield of the pump casing. The metal pump casing with the PFA liner used for handling corrosive liquids includes a suction casing with PFA liner, and a volute casing with PFA liner for accommodating an impeller. The volute casing also collects and then ejects the liquid through a discharge. The suction casing with the PFA liner and the volute casing with the PFA liner are separately formed as two workpieces by injection molding process and then assembled to form the pump casing so as to reduce the residual stress applied in the PFA liner.Type: ApplicationFiled: November 23, 2015Publication date: December 15, 2016Inventors: CHIN-CHENG WANG, CHIH-HSIEN SHIH, CHIH-KUAN SHIH, YU-LUN JHANG, HUAN-JAN CHIEN, SHU-YEN CHIEN
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Patent number: 9169842Abstract: A permanent magnet canned motor pump features in its corrosion-protection housing which comprises a reinforced bracket, motor casing and a motor rear casing. The reinforced bracket is made of corrosion-resistance plastic and the motor casing and the motor rear casing are made of aluminum alloy. Accordingly, the corrosion-protection housing is capable of preventing the corrosion of the chemical liquid to the aluminum alloy components. Beside, the permanent magnet canned motor pump provides a heat dissipation mechanism while meeting the structural need of the corrosion-protection housing, so that the motor can dissipate heat in a sufficient rate.Type: GrantFiled: October 22, 2012Date of Patent: October 27, 2015Assignee: ASSOMA INC.Inventors: Huan-Jan Chien, Chin-Cheng Wang, Chih-Hsien Shih, Chih-Kuan Shih
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Patent number: 8597000Abstract: The present invention discloses structure improvement of a canned motor pump, and more particular to a canned motor pump which is a plastic pump or a pump with plastic lining to transfer chemical liquids, wherein a support structure of a rotor system is improved to provide a high-rigidity cantilever stationary shaft to satisfy all kinds of requirements.Type: GrantFiled: March 18, 2010Date of Patent: December 3, 2013Assignee: Assoma Inc.Inventors: Huan-Jan Chien, Ching-Chang Wang, Chih-Kuan Shih
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Publication number: 20100284804Abstract: The present invention discloses structural improvement of the vertical submerged pump for chemical application. The present invention is focus on reducing the crystal lump generated from high speed etching process. Structural improvement includes a shaft seal device, a diffuser and an upper inner plate. The shaft seal device offer extra flow resistance to balance the differential pressure between the inner space and pump front casing, the function are prevents air bubbles be sucked into the pump, and reduces flow leakage from the front casing into inner space, also absorbs high-pressure back-flush to avoid liquid splash in dry surface of inner space of support column. The diffuser in the support column offer extra inducer function to guides the liquid from the inner space flowing out to the tank, so as to get a stable liquid level in the inner space, thereby largely reducing splashing of the liquid.Type: ApplicationFiled: May 11, 2009Publication date: November 11, 2010Inventors: HUAN-JAN CHIEN, CHING-CHANG WANG, CHIH-KUAN SHIH, SHU-YEN CHIEN
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Publication number: 20100272592Abstract: The present invention discloses structure improvement of a canned motor pump, and more particular to a canned motor pump which is a plastic pump or a pump with plastic lining to transfer chemical liquids, wherein a support structure of a rotor system is improved to provide a high-rigidity cantilever stationary shaft to satisfy all kinds of requirements.Type: ApplicationFiled: March 18, 2010Publication date: October 28, 2010Inventors: Huan-Jan Chien, Ching-Chang Wang, Chih-Kuan Shih