Patents by Inventor Chih-An Ku
Chih-An Ku 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: 20230178360Abstract: A cleaning device comprises a carrier and a cleaning unit. On the surface of the carrier, the cleaning unit comprises cleaning bodies of trapezoidal cylinders with a first surface and two inclined planes. The first surface is parallel to the surface of the carrier. The inclined planes face the circumference of the carrier and are separately located between adjacent two of the cleaning bodies. The first surface has a distance of 6.5 mm±10% to the surface of the carrier. The inclined planes at two sides have an angle of 50°±10% in between. When the cleaning body starts contacting a wafer, one of the inclined planes is deformed as a beginning. Then, gentle area changes is formed from contacting until departing between the cleaning body and the wafer. The wafer is thus stably forced to improve cleaning ability of scrubbing and stabilize surface friction of the wafer.Type: ApplicationFiled: December 6, 2021Publication date: June 8, 2023Inventors: Chih-An Ku, Tzu-Yen Chuang, Hung-Chieh Chao, Fu-Qiang Zhang, Ming-Chin Tsai
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Patent number: 11109667Abstract: A cleaning brush is provided. A cleaning unit comprises cleaning beans fixed on a surface of the carrier in a bi-spiral arrangement. The cleaning beans are arranged in an unequally-spaced manner on center of the carrier along a baseline; and, thus, bi-spirals are formed on the center and coiled in two different outward directions. Two annular spiral curve paths are formed with the cleaning beans as coiling the carrier and extending along the two directions. When the carrier cleans an electronic device, a solution or cleaning agent is discharged along the curve paths in spiral tangential directions. Hence, the bi-spiral cleaning unit obtains positive and negative directions on rotating to create a plurality of flow fields. Dirt is discharged easily with water distribution enhanced as compared to unidirectional spiral cleaning devices while a large contact surface, a good cleaning efficiency, and a high decontamination ratio are achieved.Type: GrantFiled: October 16, 2019Date of Patent: September 7, 2021Assignee: Tung An Development Ltd.Inventors: Chih-An Ku, Tzu-Yen Chuang, Hung-Chieh Chao, Fu-Qiang Zhang
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Publication number: 20210112961Abstract: A cleaning brush is provided. A cleaning unit comprises cleaning beans fixed on a surface of the carrier in a bi-spiral arrangement. The cleaning beans are arranged in an unequally-spaced manner on center of the carrier along a baseline; and, thus, bi-spirals are formed on the center and coiled in two different outward directions. Two annular spiral curve paths are formed with the cleaning beans as coiling the carrier and extending along the two directions. When the carrier cleans an electronic device, a solution or cleaning agent is discharged along the curve paths in spiral tangential directions. Hence, the bi-spiral cleaning unit obtains positive and negative directions on rotating to create a plurality of flow fields. Dirt is discharged easily with water distribution enhanced as compared to unidirectional spiral cleaning devices while a large contact surface, a good cleaning efficiency, and a high decontamination ratio are achieved.Type: ApplicationFiled: October 16, 2019Publication date: April 22, 2021Inventors: Chih-An Ku, Tzu-Yen Chuang, Hung-Chieh Chao, Fu-Qiang Zhang
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Patent number: 10758946Abstract: A cleaning brush comprising a carrier and a cleaning unit is provided. The cleaning unit comprises a plurality of cleaning beans set on a surface of the carrier in a spiral arrangement. A spiral coiling around the carrier from an end of the carrier to the other end is formed. A spiral curve path is formed to coil the carrier circumferentially by extendedly arranging the cleaning beans. Hence, the present invention uses the cleaning beans of the cleaning unit to be set on surface of the carrier. On rotating in a fixed direction, the spiral cleaning unit generates a flow field which not only comprises a vertical flow for an object to be cleaned but also a horizontal flow forming a parallel stream. Thus, dirt can be removed more easily than by using a traditional matrix cleaning device.Type: GrantFiled: January 23, 2019Date of Patent: September 1, 2020Assignee: Tung An Development Ltd.Inventors: Chih-An Ku, Tzu-Yen Chuang, Hung-Chieh Chao
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Publication number: 20200230656Abstract: A cleaning brush comprising a carrier and a cleaning unit is provided. The cleaning unit comprises a plurality of cleaning beans set on a surface of the carrier in a spiral arrangement. A spiral coiling around the carrier from an end of the carrier to the other end is formed. A spiral curve path is formed to coil the carrier circumferentially by extendedly arranging the cleaning beans. Hence, the present invention uses the cleaning beans of the cleaning unit to be set on surface of the carrier. On rotating in a fixed direction, the spiral cleaning unit generates a flow field which not only comprises a vertical flow for an object to be cleaned but also a horizontal flow forming a parallel stream. Thus, dirt can be removed more easily than by using a traditional matrix cleaning device.Type: ApplicationFiled: January 23, 2019Publication date: July 23, 2020Inventors: Chih-An Ku, Tzu-Yen Chuang, Hung-Chieh Chao
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Patent number: 8950032Abstract: A novel cleaning tool is provided. A net-like carrier is twined on an inner cylinder. Protrusions of the inner cylinder are butted again a cleaning unit. With the net-like carrier and the protrusions, a bond between the cleaning unit and the inner cylinder is enhanced to strengthen the whole structure. Thus, stability of high-speed rotation of the cleaning unit is further improved to avoid separating the cleaning unit and the inner cylinder.Type: GrantFiled: July 27, 2011Date of Patent: February 10, 2015Assignee: Tung An Development Ltd.Inventors: Tung-Chung Cheng, Chih-An Ku, Hung-Chia Chen, Jung-Pin Mao
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Publication number: 20120096660Abstract: A novel cleaning tool is provided. A net-like carrier is twined on an inner cylinder. Protrusions of the inner cylinder are butted again a cleaning unit. With the net-like carrier and the protrusions, a bond between the cleaning unit and the inner cylinder is enhanced to strengthen the whole structure. Thus, stability of high-speed rotation of the cleaning unit is further improved to avoid separating the cleaning unit and the inner cylinder.Type: ApplicationFiled: July 27, 2011Publication date: April 26, 2012Applicant: TUNG AN DEVELOPMENT LTD.Inventors: Tung-Chung Cheng, Chih-An Ku, Hung-Chia Chen, Jung-Pin Mao
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Publication number: 20100212100Abstract: A cleaning apparatus is provided to clean a sophisticated electric device. The apparatus has cleaning units and each of the cleaning units has a cambered top. Thus, coordinated with an actuating device, a sophisticated electric device can be cleaned by using the cleaning apparatus with cleaning units having cambered tops.Type: ApplicationFiled: January 11, 2010Publication date: August 26, 2010Applicant: TUNG AN DEVELOPMENT LTD.Inventors: Chih-An Ku, Terry Cheng, Roy Chen