Patents by Inventor King Sang Tsui

King Sang Tsui 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).

  • Apparatus for dispensing measured quantities of liquid
    Patent number: 8220661
    Abstract: A liquid dispensing apparatus is provided which has a syringe for storing and dispensing a liquid, and a connector passage connected to the syringe. A positive pressure passage is connected to an air source for supplying positive pressure to the syringe, and there is a pressure valve located along the positive pressure passage that is operative to control the flow of air along the positive pressure passage. A vacuum passage is connected to a vacuum generator for supplying vacuum pressure to the syringe, and there is a vacuum valve located along the vacuum passage that is operative to control the flow of air along the vacuum passage. The positive pressure passage and vacuum passage are connected to the connector passage. A pressure sensor is also provided to measure the pressure in the connector passage.
    Type: Grant
    Filed: August 4, 2008
    Date of Patent: July 17, 2012
    Assignee: ASM Assembly Automation Ltd
    Inventors: Hon Yu Peter Ng, Dazhang Liao, Wing Fung Jacob Cheung, Ping Kong Choy, King Sang Tsui
  • APPARATUS FOR DISPENSING MEASURED QUANTITIES OF LIQUID
    Publication number: 20100025428
    Abstract: A liquid dispensing apparatus is provided which has a syringe for storing and dispensing a liquid, and a connector passage connected to the syringe. A positive pressure passage is connected to an air source for supplying positive pressure to the syringe, and there is a pressure valve located along the positive pressure passage that is operative to control the flow of air along the positive pressure passage. A vacuum passage is connected to a vacuum generator for supplying vacuum pressure to the syringe, and there is a vacuum valve located along the said vacuum passage that is operative to control the flow of air along the vacuum passage. The positive pressure passage and vacuum passage are connected to the connector passage. A pressure sensor is also provided to measure the pressure in the connector passage.
    Type: Application
    Filed: August 4, 2008
    Publication date: February 4, 2010
    Inventors: Hon Yu Peter NG, Dazhang LIAO, Wing Fung Jacob CHEUNG, Ping Kong CHOY, King Sang TSUI